Transportation structure without motion friction

Abstract

The invention relates to the technical field of welding, in particular to a transport structure without motion friction, which comprises two groups of oppositely arranged frames, first conveying pieces are arranged on the frames, and a plurality of rows of first support pieces are distributed on the first conveying pieces; a first conveying part is arranged on the frame, a plurality of rows of second supporting parts are distributed on the second conveying part, and the second supporting parts can move relative to the frame in the vertical direction. And the second supporting piece can be switched between a third position for supporting the product and a fourth position for separating from the product. Through rotation and switching actions of the rod A and the rod B, alternate connection and non-sliding friction contact of products on the two sets of supporting pieces are achieved, compared with a traditional chain guide rail structure, the problems of abrasion, jamming and product scratching caused by lubrication failure at the high temperature are avoided, the service life of equipment is remarkably prolonged, and the stability of the equipment is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding technology, in particular to a transport structure without motion friction. BACKGROUND

[0002] In the field of electronic manufacturing, reflow soldering equipment is the core equipment for realizing surface mount technology, which melts the solder through high temperature heating to complete the welding of electronic components and circuit boards.

[0003] Traditional reflow soldering equipment adopts horizontal structure and mainly relies on guide rail chain to transport circuit boards. However, with the development of miniaturization and high density of electronic products, the horizontal reflow soldering equipment has problems of large floor area, low thermal efficiency and unobvious capacity improvement, so there is a demand for the development of vertical structure for reflow soldering equipment.

[0004] However, in the structural design from horizontal reflow soldering equipment to vertical reflow soldering equipment, the traditional transport structure faces multiple problems: first, although the traditional guide rail chain is hardened, it is easy to deform and warp under high temperature of about 300℃ for long-term operation, which increases the risk of chain jamming and circuit board falling off; in addition, there is sliding friction between the chain and the guide rail, and the lubrication failure at high temperature aggravates the wear, which requires frequent maintenance, and the friction resistance also affects the transportation accuracy, resulting in displacement deviation of the circuit board and reducing the welding yield; finally, the horizontal chain transport cannot be directly converted into vertical multi-layer lifting, and complex transmission mechanisms are needed during the transformation process, which further increases the risk of board jamming and maintenance cost.

[0005] Therefore, a transport structure without motion friction is proposed. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the present application provides a transport structure without motion friction.

[0007] To solve the above technical problems, the present application provides the following technical solutions: a transport structure without motion friction, comprising two groups of oppositely arranged frames, the frames being provided with first conveying members, the first conveying members being provided with a plurality of columns of first supporting members, the first supporting members being arranged to be switchable between a first position for supporting products and a second position for separating from the products, the frames being provided with second conveying members, the second conveying members being provided with a plurality of columns of second supporting members, the second supporting members being arranged to be movable in a vertical direction relative to the frames, and the second supporting members being arranged to be switchable between a third position for supporting products and a fourth position for separating from the products, the first conveying members being A rods, the frames being provided above with A rod connecting plates, the A rods being connected to the A rod connecting plates in a vertical direction, the second conveying members being B rods, the B rods being connected to the frames in a vertical direction and being connected to the frames as a whole, the first supporting members being A rod supporting plate shafts, and the second supporting members being B rod supporting plate shafts, the A rod supporting plate shafts and the B rod supporting plate shafts both being cylindrical shafts, the A rod supporting plate shafts and the B rod supporting plate shafts both being bolted, and the A rods and the B rods both being provided with screw holes for being threadedly connected with the bolts.

[0008] As a preferred technical solution of the present application, the frames are provided with driving assemblies for providing driving force for the first supporting members and the second supporting members, the driving assemblies comprising lifting platforms, the frames being provided below with upper fixed platforms and lower fixed platforms, both ends of the upper fixed platforms and the lower fixed platforms being rotatably connected with lead screws, the lifting platforms being arranged between the upper fixed platforms and the lower fixed platforms and being threadedly connected with the lead screws, both of the lead screws being connected with sprockets, the two sprockets being connected through a chain transmission, the lower fixed platforms being provided with lifting motors for driving the lead screws to rotate, the A rods being rotatably connected with the upper fixed platforms, the B rods being slidably connected with the upper fixed platforms, the bottom ends of the B rods being rotatably connected with the lifting platforms and being connected to the lifting platforms as a whole, the lower fixed platforms being provided with A rod transmission motors, the transmission shafts of the A rod transmission motors being connected with the A rods, the lifting platforms being provided with B rod transmission motors, the transmission shafts of the B rod transmission motors being connected with the B rods.

[0009] As a preferred technical solution of the present application, the number of the A rods and the B rods is multiple, the multiple A rods and the multiple B rods being staggered with each other, one of the A rods penetrating through the lifting platform and being connected with the transmission shaft of the A rod transmission motor, the transmission shaft of the B rod transmission motor being connected with one of the B rods, the corresponding surfaces of the upper fixed platforms and the lifting platforms both being connected with sliding rails, the sliding rails being slidably connected with sliding seats, the sliding seats being connected with fork sleeves, the fork sleeves being provided with a plurality of fork holes, the bottom ends of the A rods being connected with A rod forks, the bottom ends of the B rods being connected with B rod forks, the A rod forks corresponding to the fork sleeves on the upper fixed platforms and being inserted into the fork holes, the B rod forks corresponding to the fork sleeves on the lifting platforms and being inserted into the fork holes.

[0010] As a preferred technical solution of the present application, the number of the frames of each group is two, the two frames of each group being distributed on two sides, the products being lifted on one side of the frames and being lowered on the other side of the frames.

[0011] As a preferred technical solution of the present application, the frame is provided with a driving assembly for providing driving force for the first support and the second support, which can perform the following actions: S1, driving the first support to move from the first position to the second position to disengage the product, at this time the product is supported by the second support; S2, driving the second support and the product supported thereby to ascend by one column height, driving the first support to return from the second position to the first position, at this time the first support is located below the product to support the product; S3, driving the second support supporting the product to move from the third position to the fourth position to disengage the product, at this time the product is supported by the first support, driving the second support to descend by one column height to the initial height, and driving the second support to return from the fourth position to the third position; S4, by performing S1 to S4, the product is lifted by one column height relative to the initial position, repeating S1 to S4 to realize continuous lifting and transportation of the product; the driving assembly is further configured to be capable of switching the lifting actions to perform S1 to S4, so that the product gradually descends by one column height relative to the frame, realizing continuous descending transportation of the product; before performing the actions of moving the first support from the first position to the second position to disengage the product and returning the second position to the first position, and before performing the actions of moving the second support from the third position to the fourth position to disengage the product and returning the fourth position to the third position, a space is left between the product and the frame by controlling the lifting of the B rod.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] 1. Through the rotation and switching actions of the A rod and the B rod, the product is alternately transferred on the two groups of supports without sliding friction contact, compared with the traditional chain guide structure, the wear, jamming and product scratching problems caused by lubrication failure at high temperature are avoided, the equipment life and stability are significantly improved, and the structure is simple, reducing the production and maintenance costs.

[0014] 2. Through the design of two groups of frame partitions cooperating with layer-by-layer conveying actions, the product is lifted on one side while the other side is lowered synchronously, and the loading, heating, cooling and unloading processes are seamlessly connected, greatly improving the capacity efficiency of the vertical reflow soldering equipment.

[0015] 3. The A rod and the B rod are directly screwed to the rod body by bolts, and can be independently and quickly replaced when damaged, without the need to disassemble the whole transmission structure, the fork sleeve synchronous mechanism simplifies the multi-axis linkage, and reduces the maintenance complexity.

[0016] 4. The product is always supported by at least one group of supports, and a safety gap is left by lifting the B rod before transfer, avoiding collision between the product and the product when the support plate shaft rotates, the cylindrical support plate shaft reduces the stress concentration point, further eliminating the risk of plate jamming.

[0017] 5. The screw rod and sprocket synchronous lifting motor realizes multi-rod linkage, and cooperates with the fork sleeve single motor to drive the multi-rod synchronous rotation, which greatly reduces the amount of motor used. The integrated design of the frame and drive components saves space for vertical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the outer side structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the inner side structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the lateral structure of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the shift fork sleeve of the present invention;

[0023] Figure 6 It is a schematic diagram of the connection structure between the shift fork sleeve and the slide rail of the present invention.

[0024] Among them: 10. Frame; 11. Rod A; 12. Rod B; 13. Rod A support plate shaft; 14. Rod B support plate shaft; 15. Rod A connecting plate; 16. Upper fixed platform; 17. Lower fixed platform; 18. Lifting platform; 19. Rod A transmission motor; 20. Rod B transmission motor; 21. Lifting motor; 22. Rod A shift fork; 23. Rod B shift fork; 24. Slide rail; 25. Fork sleeve; 26. Screw rod; 27. Slide rod; 28. Sprocket; 29. ​​Chain; 30. Shift hole. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific examples, but the following examples are only preferred embodiments of the present invention, not all. Based on the examples in the implementation manner, other embodiments obtained by those skilled in the art without making creative work are all within the scope of protection of the present invention. The experimental methods in the following examples, unless otherwise specified, are all conventional methods, and the materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels.

[0026] Example: Figure 1As shown in the figure, a transport structure without motion friction includes two sets of oppositely arranged frames 10, the frames 10 are provided with first conveying members, which are A rods 11, the frames 10 are provided with A rod connecting plates 15 above, the A rod connecting plates 15 are not connected with the frames 10, the A rod connecting plates 15 are used for fixedly connecting on reflow soldering equipment, the A rods 11 are rotatably connected with the A rod connecting plates 15 in a vertical direction, the rotatable connection is a known technology, which is realized by means of a rotating bearing arranged in an opening or a slot, and the rotating bearing is connected to realize the rotatable connection, which will not be described here, the frames 10 are provided with through holes for the A rods 11 to pass through, the first conveying members are provided with multiple columns of first supporting members at equal intervals, the first supporting members are A rod supporting plate shafts 13, and the A rod supporting plate shafts 13 are specifically cylindrical shafts connected to the surfaces of the A rods 11.

[0027] As shown in the figure, Figure 1 the frames 10 are provided with second conveying members, which are B rods 12, the B rods 12 are rotatably connected with the frames 10 in a vertical direction and are connected with the frames 10 as a whole, the second conveying members are provided with multiple columns of second supporting members, the second supporting members are B rod supporting plate shafts 14, and the B rod supporting plate shafts 14 are specifically cylindrical shafts connected to the surfaces of the B rods 12, the A rod supporting plate shafts 13 and the B rod supporting plate shafts 14 are all bolts, and the A rods 11 and the B rods 12 are both provided with screw holes for threadedly connecting with the bolts.

[0028] As shown in the figure, Figure 1 , Figure 2 and Figure 3As shown, the frame 10 is provided with a drive assembly for providing driving force for the first support and the second support, the drive assembly includes a lifting platform 18, the frame 10 is provided below with an upper fixed platform 16 and a lower fixed platform 17, the upper fixed platform 16 and the lower fixed platform 17 are arranged in an up-down distribution, both ends of the upper fixed platform 16 and the lower fixed platform 17 are rotatably connected with a lead screw 26, the lifting platform 18 is arranged between the upper fixed platform 16 and the lower fixed platform 17 and is threadedly connected with the lead screw 26, the four corners of the upper fixed platform 16 and the lower fixed platform 17 are fixedly connected with a sliding rod 27, a sprocket 28 is slidably connected with the sliding rod 27, the sliding connection is a known technology, which is realized by opening a hole and arranging a sliding bearing, and the sliding connection is realized by connecting the sliding bearing, which will not be described here, both the lead screws 26 are connected with the sprockets 28, the two sprockets 28 are drivingly connected through a chain 29, the lower fixed platform 17 is provided with a lifting motor 21 for driving the lead screw 26 to rotate, the upper fixed platform 16 and the lower fixed platform 17 are left with a spacing for the lifting of the lifting platform 18, the A rod 11 is rotatably connected with the upper fixed platform 16, the B rod 12 is slidably connected with the upper fixed platform 16, and the bottom end of the B rod 12 is rotatably connected with the lifting platform 18 and is connected with the lifting platform 18 as a whole, the lower fixed platform 17 is provided with an A rod transmission motor 19, a transmission shaft of the A rod transmission motor 19 is connected with the A rod 11, the A rod transmission motor 19 can drive the A rod 11 to rotate in opposite directions when started, the lifting platform 18 is provided with a B rod transmission motor 20, a transmission shaft of the B rod transmission motor 20 is connected with the B rod 12, the B rod transmission motor 20 can drive the B rod 12 to rotate in opposite directions when started.

[0029] As shown in Figure 1 , Figure 2 and Figure 3 , the first support is arranged to be switchable between a first position for supporting a product and a second position for disengaging from the product, the switching manner is to control the rotation of the A rod 11 through the A rod transmission motor 19, and then control the angle of the A rod support plate shaft 13, the first position is corresponding to the angle of the corresponding faces of the two groups of frames 10, and the second position is an angle of ninety degrees to two hundred and seventy degrees, the second support is arranged to be movable in a vertical direction relative to the frame 10, specifically, the lifting motor 21 is started to drive the lead screw 26 to rotate, the lead screw 26 drives the lifting platform 18 to rise and fall along the sliding rod 27 through the threaded connection with the lifting platform 18, the B rod 12 connected with the lifting platform 18 rises and falls together with the frame 10, so that the B rod support plate shaft 14 rises and falls, and the second support is arranged to be switchable between a third position for supporting a product and a fourth position for disengaging from the product, the switching manner is to control the rotation of the B rod 12 through the B rod transmission motor 20, and then control the angle of the B rod support plate shaft 14, the third position is corresponding to the angle of the corresponding faces of the two groups of frames 10, and the fourth position is an angle of ninety degrees to two hundred and seventy degrees.

[0030] As shown in Figure 4 , Figure 5 and Figure 6As shown, there are multiple A rods 11 and multiple B rods 12, and the multiple A rods 11 and multiple B rods 12 are distributed horizontally and staggered with each other. One of the A rods 11 passes through the lifting platform 18 and is connected to the drive shaft of the A rod drive motor 19. The drive shaft of the B rod drive motor 20 is connected to one of the B rods 12. The corresponding surfaces of the upper fixed platform 16 and the lifting platform 18 are connected with slide rails 24, and a slide seat is slidably connected to the slide rail 24, and a shift fork sleeve 25 is connected to the slide seat. A plurality of shift holes 30 are provided on the shift fork sleeve 25. The bottom end of the A rod 11 is connected to the A rod fork 22, and the bottom end of the B rod 12 is connected to the B rod fork 23. The A rod fork 22 corresponds to the fork sleeve 25 on the upper fixed platform 16 and is inserted into the shift hole 30, and the B rod fork 23 corresponds to the fork sleeve 25 on the lifting platform 18 and is inserted into the shift hole 30.

[0031] The drive assembly performs the following steps during operation:

[0032] S1. The A-rod transmission motor 19 is started to drive the A-rod 11 connected thereto to rotate 90 degrees. When the A-rod 11 rotates, the A-rod shift fork 22 pushes the shift fork sleeve 25 to slide through the shift hole 30. When the shift fork sleeve 25 slides, it shifts the A-rods 11 in other positions to rotate together, so that the first support member moves from the first position to the second position and disengages from the product. At this time, the product is supported by the second support member.

[0033] S2, the lifting motor 21 is started to rotate the screw rod 26, which drives the lifting platform 18 to rise. The lifting platform 18 pushes the B rod 12 and the frame 10 to rise until the second support member and the product supported by it are driven to rise to a row height. The A rod transmission motor 19 is started to drive the A rod 11 connected to it to rotate 90 degrees to reset, driving the first support member to return from the second position to the first position. At this time, the first support member is located below the product to support the product;

[0034] S3, the B-rod transmission motor 20 is started to drive the B-rod 12 connected thereto to rotate 90 degrees. When the B-rod 12 rotates, the B-rod shift fork 23 pushes the shift fork sleeve 25 to slide through the shift hole 30. When the shift fork sleeve 25 slides, it shifts the B-rod 12 in other positions to rotate together, so that the second support member supporting the product moves from the third position to the fourth position and is separated from the product. At this time, the product is supported by the first support member. The lifting motor 21 is started to rotate the screw rod 26 in the opposite direction to reset. The screw rod 26 drives the lifting platform 18 to descend. The lifting platform 18 drives the B-rod 12 and the frame 10 to descend, driving the second support member to descend one column height to the initial height;

[0035] S4, by executing S1 to S4, the product rises one column height relative to the initial position, and S1 to S4 are repeated to achieve continuous lifting and transportation of the product;

[0036] The driving assembly is further arranged to be capable of exchanging the lifting actions S1-S4, specifically, the first support is moved from the first position to the second position to disengage the product, the second support and the product supported thereby are driven to descend by one row of height, the first support is driven to return from the second position to the first position, at this time, the first support is located below the product to support the product, the second support supporting the product is driven to move from the third position to the fourth position to disengage the product, the second support is driven to ascend by one row of height to the initial height, and the second support is driven to return from the fourth position to the third position, so that the product is gradually lowered by one row of height relative to the frame 10, and the continuous descending transportation of the product is realized.

[0037] As shown in Figure 1 The number of each group of frames 10 is two, and the two groups of frames 10 of each group are distributed on two sides, one side is the heating ascending area, and the other side is the cooling descending area. The product is loaded on the frame 10 on the heating ascending area side and then lifted, and is unloaded after being lowered on the frame 10 on the cooling descending area side.

[0038] Before the product handover action is performed, that is, before the actions of the first support moving from the first position to the second position to disengage the product and returning from the second position to the first position, and before the actions of the second support moving from the third position to the fourth position to disengage the product and returning from the fourth position to the third position, a space is left between the product and the frame 10 by controlling the lifting of the B rod 12, so as to avoid the movement of the first support rubbing the product.

[0039] Working principle:

[0040] The product is inserted into a pair of frames 10 in the heating ascending area in a horizontal direction from the inlet, and then the driving assembly performs the action of lifting the product layer by layer. After a layer is lifted and reset, the product can be continuously inserted into the lower layer.

[0041] When the product is lifted to the top layer, it is pushed to the frame 10 on the cooling descending area side by the push plate device, and then the action of the heating ascending area is repeated in reverse by program control, so as to lift the product layer by layer until the bottom layer, and then the product is pushed out of the machine by the push plate device, thereby completing the production process of the product.

[0042] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A transport structure without motion friction, characterized in that: The invention comprises two sets of frames (10) arranged in opposition to each other, wherein a first conveying member is arranged on the frame (10), and a plurality of rows of first supporting members are distributed on the first conveying member, and the first supporting members are arranged to be switchable between a first position supporting a product and a second position detached from the product; The frame (10) is provided with a second conveying member, and a plurality of rows of second supporting members are distributed on the second conveying member. The second supporting members are configured to be movable in a vertical direction relative to the frame (10), and the second supporting members are configured to be switchable between a third position supporting a product and a fourth position detached from the product. The frame (10) is provided with a driving assembly for providing driving force to the first support member and the second support member, and the driving assembly can perform the following actions: S1, driving the first support member to move from the first position to the second position to separate from the product, at which time the product is supported by the second support member; S2, driving the second support member and the product supported by it to rise by one column height, and driving the first support member to return from the second position to the first position, at which point the first support member is located below the product and supports the product; S3: driving the second support member supporting the product to move from the third position to the fourth position, disengaging from the product. At this point, the product is supported by the first support member. The second support member is driven to descend one column height to the initial height. The second support member is driven to return from the fourth position to the third position. S4, by executing S1 to S4, the product rises one column height relative to the initial position, and S1 to S4 are repeated to achieve continuous lifting and transportation of the product; The driving assembly is further configured to be able to switch the lifting and lowering actions to perform S1 to S4, so that the product gradually descends a row height relative to the frame (10), thereby realizing continuous descending transportation of the product.

2. A transport structure without motion friction according to claim 1, characterized in that: The first conveying member is an A-rod (11), an A-rod connecting plate (15) is provided above the frame (10), and the A-rod (11) is connected to the A-rod connecting plate (15) by rotating in a vertical direction. The second conveying member is a B-rod (12), and the B-rod (12) is connected to the frame (10) by rotating in a vertical direction and is connected to the frame (10) as a whole.

3. A transport structure without motion friction according to claim 2, characterized in that: The first supporting member is the A-rod supporting plate shaft (13), and the second supporting member is the B-rod supporting plate shaft (14). Both the A-rod supporting plate shaft (13) and the B-rod supporting plate shaft (14) are cylindrical shafts.

4. A transport structure without motion friction according to claim 3, characterized in that: The A-rod supporting plate shaft (13) and the B-rod supporting plate shaft (14) are both bolts, and the A-rod (11) and the B-rod (12) are both provided with screw holes for threaded connection with the bolts.

5. A transport structure without motion friction according to claim 2, characterized in that: The driving assembly includes a lifting platform (18), an upper fixed platform (16) and a lower fixed platform (17) are arranged below the frame (10), both ends of the upper fixed platform (16) and the lower fixed platform (17) are rotatably connected with a screw rod (26), the lifting platform (18) is arranged between the upper fixed platform (16) and the lower fixed platform (17) and is threadedly connected to the screw rod (26), the two screw rods (26) are connected with a sprocket (28), the two sprockets (28) are connected by a chain (29), and the lower fixed platform (17) is equipped with a chain for driving the screw rod (26). 6) a rotating lifting motor (21), the A rod (11) is rotatably connected to the upper fixed platform (16), the B rod (12) is slidably connected to the upper fixed platform (16), and the bottom end of the B rod (12) is rotatably connected to the lifting platform (18) and connected to the lifting platform (18) as a whole, the A rod transmission motor (19) is installed on the lower fixed platform (17), the transmission shaft of the A rod transmission motor (19) is connected to the A rod (11), and the B rod transmission motor (20) is installed on the lifting platform (18), and the transmission shaft of the B rod transmission motor (20) is connected to the B rod (12).

6. A transport structure without motion friction according to claim 5, characterized in that: The number of the A rods (11) and the B rods (12) is multiple, and the multiple A rods (11) and the multiple B rods (12) are staggered and distributed with each other. One of the A rods (11) passes through the lifting platform (18) and is connected to the transmission shaft of the A rod transmission motor (19), and the transmission shaft of the B rod transmission motor (20) is connected to one of the B rods (12). The corresponding surfaces of the upper fixed platform (16) and the lifting platform (18) are connected with a slide rail (24), and the slide rail (24) is slidably connected to the upper fixed platform (16). A slide is provided, and a shift fork sleeve (25) is connected to the slide, and a plurality of shift holes (30) are provided on the shift fork sleeve (25). The bottom end of the A rod (11) is connected to the A rod shift fork (22), and the bottom end of the B rod (12) is connected to the B rod shift fork (23). The A rod shift fork (22) corresponds to the shift fork sleeve (25) on the upper fixed platform (16) and is inserted into the shift hole (30). The B rod shift fork (23) corresponds to the shift fork sleeve (25) on the lifting platform (18) and is inserted into the shift hole (30).

7. The transport structure without motion friction according to claim 1, characterized in that: The number of the frames (10) in each group is two, and the two groups of frames (10) in each group are distributed on both sides.

8. The transport structure without motion friction according to claim 6, characterized in that: Before the product transfer operation is performed, a distance is created between the product and the B rod (12) by controlling the lifting and lowering of the rod.

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