CN221158912U - Chain transmission structure of vacuum reflow soldering furnace - Google Patents

Abstract

The application discloses a chain transmission structure of a vacuum reflow soldering furnace, which comprises a furnace body, wherein an installation groove is formed in the furnace body, a chain guide combined device is arranged in the installation groove and can transport a jig, the chain guide combined device comprises transport assemblies symmetrically arranged in the installation groove, two groups of chain wheel groups are correspondingly arranged at one side, close to the two groups of transport assemblies, of chain wheel groups, guide chains are meshed on the chain wheel groups, and support parts are arranged on the guide chains and can support the jig for transport; the sprocket group is including the adjustable sprocket that can remove, it is connected through the flexible compensation arrangement with setting up on the transportation subassembly, at the in-process that adjustable sprocket constantly displaces, flexible compensation arrangement can support adjustable sprocket and reset adjustable sprocket, thereby guarantee the tensioning force of guide chain constantly, thereby avoid the guide chain to appear tripping and the card problem of being in the beginning because of the length change that temperature variation leads to, guarantee that the tool can steadily transport, avoid the tool to remove the in-process and appear jumping, lead to the original position of components and parts to change in the tool, and then can improve production quality.

Description

Chain transmission structure of vacuum reflow soldering furnace

Technical Field

The disclosure relates to the technical field of vacuum welding furnaces, in particular to an elevator safety tongs and a tongs seat.

Background

With the development of vacuum welding technology, vacuum reflow soldering has been successfully applied to the fields of electronic device welding, electronic component repair, packaging technology and the like, and due to the continuous perfection and development of vacuum welding furnace technology, the application of large-scale industrialized vacuum welding furnaces is popularized, in the design of large-scale vacuum welding furnaces, channel type welding furnaces, namely channels are generally set with different temperature ranges, and a jig sequentially passes through each process chamber according to the process sequence to complete the whole welding process, so that a reliable and stable transmission mechanism is required in the moving process of the jig.

In the prior art, a motor is generally arranged on a transmission device to drive a gear, the gear drives a roller in an execution device to rotate, and the gear is matched with a guide wheel in the transmission process, so that the direction problem in the moving process can be continuously regulated, but the transmission guide wheel and a jig repeatedly pass through the high temperature and the transformation of the room temperature in the process flow to cause overlarge internal temperature stress, deformation and incapability of regulating the position of the roller, so that the jig can jump in the moving process, and the original position distribution of components in the jig is changed to cause quality defects.

Disclosure of Invention

In view of the foregoing drawbacks or shortcomings in the prior art, it is desirable to provide a vacuum reflow soldering oven chain drive structure.

In a first aspect, the present application provides a chain drive structure for a vacuum reflow soldering oven, comprising:

the furnace body is provided with an opening at the top and is movably provided with a sealing cover, and an installation groove communicated with the opening is formed in the furnace body;

the guide chain combination device is arranged in the mounting groove and used for driving the jig to transport along the first direction, the guide chain combination device comprises two groups of parallel and symmetrically arranged transport assemblies, chain wheel groups are correspondingly arranged on one sides, close to the two groups of transport assemblies, of the two groups of transport assemblies, guide chains are arranged on the chain wheel groups in a meshed manner, and supporting parts are arranged on one sides, close to the two guide chains, of the two groups of transport assemblies and used for supporting the jig;

The sprocket set includes an adjustable sprocket movable in a second direction, the second direction being perpendicular to the first direction;

The flexible compensation device is arranged on one side, far away from the chain wheel group, of the conveying assembly, corresponds to the adjustable chain wheel and is used for supporting the adjustable chain wheel and resetting the adjustable chain wheel so as to ensure the tension force of the guide chain.

According to the technical scheme provided by the embodiment of the application, the transportation assembly comprises the entrance plate extending along the first direction, and the two groups of chain wheels are respectively and correspondingly arranged on the side walls of the two entrance plates close to each other;

The sprocket set further comprises a first driven sprocket and a second driven sprocket, and the first driven sprocket and the second driven sprocket are respectively arranged at two ends of the top of the side wall of the plate;

The sprocket group still including being located first driven sprocket with between the driven sprocket of second and two non-regulation sprocket, drive sprocket and two non-regulation sprocket all follow the first direction is arranged in proper order on the income board, just drive sprocket and two non-regulation sprocket is in dislocation set in the second direction, adjustable sprocket is located drive sprocket with keep away from between the non-regulation sprocket of driven sprocket of second.

According to the technical scheme provided by the embodiment of the application, the inlet plate is provided with holes corresponding to the first driven sprocket, the second driven sprocket, the driving sprocket and the two non-adjusting sprockets, a high-temperature bearing is arranged in each hole, the first driven sprocket, the second driven sprocket, the driving sprocket and the two non-adjusting sprockets are coaxially and fixedly connected to the inner ring side wall of the high-temperature bearing, and a hole retainer ring is arranged in each hole and used for axially limiting the high-temperature bearing.

According to the technical scheme provided by the embodiment of the application, the guide chain is provided with an inner side and an outer side, the first driven sprocket, the second driven sprocket, the driving sprocket and the non-adjusting sprocket far away from the second driven sprocket are all meshed with the inner side of the guide chain, and the adjustable sprocket and the non-adjusting sprocket close to the second driven sprocket are all meshed with the outer side of the guide chain;

The top of the entering plate is provided with a chain guide rail between the first driven sprocket and the second driven sprocket, and the chain guide penetrates through the chain guide rail.

According to the technical scheme provided by the embodiment of the application, the flexible compensation device comprises:

The length direction of the base fixing block extends along the first direction, and the base fixing block is arranged on the side wall of the inlet plate far away from the chain wheel group;

The bottom ends of the two sliding rods are respectively connected to the two ends of the top of the base fixing block, and the two sliding rods are arranged in an extending mode along the second direction;

the limiting fixed block is arranged parallel to the base fixed block, and two ends of the bottom of the limiting fixed block are respectively connected with the top ends of the two sliding rods;

the tensioning support is provided with a cylindrical block and a rectangular block which are fixedly connected, sliding blocks are fixedly arranged on two opposite side walls of the rectangular block, sliding holes are formed in the sliding blocks in a penetrating mode along the second direction, and the sliding blocks are connected with the sliding rods in a sliding mode through the sliding holes;

the cylindrical block is fixedly arranged on the side wall of the rectangular block, which is close to the inlet plate, and a round hole is formed in the rectangular block in a penetrating manner along a third direction, a high-temperature bearing is arranged in the round hole, a hole retainer ring is arranged in the round hole and used for limiting the high-temperature bearing axially, and the third direction is perpendicular to the second direction and the first direction;

The two elastic pieces are respectively sleeved on the outer walls of the two sliding rods, and the top and the bottom of each elastic piece are respectively connected with the sliding block and the base fixing block.

According to the technical scheme provided by the embodiment of the application, the movable groove extending along the second direction is formed in the inlet plate, the cylindrical block is movably arranged in the movable groove, and the adjustable chain wheel is coaxially and fixedly connected to the side wall of the inner ring of the high-temperature bearing in the round hole;

The first driven sprocket, the second driven sprocket, the adjustable sprocket and the two non-adjustable sprockets are all rotatably provided with sprocket shafts, the sprocket shafts are close to one end surfaces of the sprocket sets and are provided with a straight groove, the other ends of the sprocket shafts penetrate through the inner ring of the high-temperature bearing, and the circumferential outer wall of the high-temperature bearing is provided with threads and locked through nuts.

According to the technical scheme provided by the embodiment of the application, the furnace body is provided with a power device for driving the driving sprocket to rotate, the furnace body is provided with a first side wall, the first side wall is parallel to the first direction, and the power device comprises:

the motor is arranged on the first side wall through a motor support, the motor is provided with an output shaft, and the output shaft is arranged along the third direction;

One end of the hexagonal shaft is connected with the output shaft through a first coupler, and the other end of the hexagonal shaft movably penetrates through the first side wall along the third direction to extend into the mounting groove and sequentially penetrates through the two driving sprockets;

and the driving sprocket is coaxially provided with an inner hexagonal through hole matched with the hexagonal shaft in a penetrating way.

According to the technical scheme provided by the embodiment of the application, the power device further comprises a magnetic fluid sealing piece sleeved on the outer wall of the hexagonal shaft, and the magnetic fluid sealing piece is positioned outside the furnace body and used for guaranteeing the tightness of the furnace body.

According to the technical scheme provided by the embodiment of the application, the tops of the two ends of the inner wall of the bottom of the mounting groove in the first direction are respectively provided with a sliding rail extending along the third direction, and the two ends of the bottom of the plate are respectively provided with a first sliding groove matched with the sliding rails;

Two copper bush sliding blocks are arranged at two ends of the bottom of the side wall, far away from the plate, of the plate, a second sliding groove matched with the sliding rail is formed in the copper bush sliding blocks, and the copper bush sliding blocks are connected with the sliding rail in a sliding mode.

According to the technical scheme provided by the embodiment of the application, the entering plate far away from the first side wall can reciprocate along the sliding rail in the mounting groove through the driving mechanism, the driving mechanism comprises the driving motor arranged on the first side wall through the bracket, the driving shaft of the driving motor extends into the bracket and is connected with the screw rod through the transmission assembly, one end of the screw rod far away from the bracket movably penetrates through the first side wall along the third direction and extends into the mounting groove, and sequentially penetrates through the two entering plates, and the screw rod is in threaded connection with the entering plate far away from the first side wall.

To sum up, this technical scheme specifically discloses a vacuum reflow soldering furnace chain drive structure, including the furnace body, the furnace body is inside to set up the mounting groove, be provided with the chain guide composite set in the mounting groove, be used for transporting the tool along first direction, the chain guide composite set is including the transportation subassembly of symmetry setting in the mounting groove, one side that two sets of transportation subassemblies are close to corresponds and is provided with the sprocket group, the meshing has the chain guide on the sprocket group, and one side that two chain guides are close to all is provided with the supporting part, when the sprocket group rotates and drives the chain guide motion, supporting part along with chain guide synchronous motion, thereby can transport the tool, the sprocket group is including the adjustable sprocket that can follow the second direction and remove, it is through being connected with the flexible compensation device that sets up in transportation subassembly keeping away from sprocket group one side, in the continuous in-process of displacement of adjustable sprocket, flexible compensation device can support the adjustable sprocket and reset the adjustable sprocket, thereby the problem that the chain guide leads to the dropout, can avoid chain guide to lead to the length increase or reduce because of temperature variation, can keep steady transportation, the tool is moved in order to avoid the position to take place in the production condition, the improvement of the tool, and further quality change in the production condition.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

Fig. 1 is a schematic diagram of a chain drive structure of a vacuum reflow soldering furnace.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is an enlarged view at B in fig. 1.

Fig. 4 is a top view of a chain drive structure of a vacuum reflow soldering oven.

Fig. 5 is a rear view of the inlet plate adjacent the first sidewall.

Fig. 6 is a front view of the entrance plate away from the first sidewall.

Fig. 7 is a cross-sectional view of a flexible compensation device.

Reference numerals in the drawings: 1. a furnace body; 2. a cover; 3. a guide chain; 4. a support part; 5. an adjustable sprocket; 6. entering a plate; 7. a first driven sprocket; 8. a second driven sprocket; 9. a drive sprocket; 10. a non-adjusting sprocket; 11. a chain guide track; 12. a base fixing block; 13. a slide bar; 14. limiting fixed blocks; 15. tensioning a bracket; 16. an elastic member; 17. chain wheel shaft; 18. a first sidewall; 19. a motor; 20. a motor support; 21. a hexagonal shaft; 22. a first coupling; 23. a magnetic fluid seal; 24. a slide rail; 25. a copper sleeve slide block; 26. a bracket; 27. a screw rod; 28. a shaft sleeve; 29. a connecting block; 30. a connecting plate; 31. a rotating rod; 32. a first drive worm gear; 33. a second drive worm gear; 34. a first worm wheel; 35. a second worm wheel; 36. a transmission rod; 37. and driving the motor.

Detailed Description

The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

Referring to fig. 1, a chain transmission structure of a vacuum reflow soldering furnace comprises a furnace body 1, wherein the top of the furnace body 1 is provided with an opening, a sealing cover 2 is movably arranged, an installation groove communicated with the opening is arranged in the furnace body 1, and the furnace body 1 is provided with a first side wall 18;

further, the furnace comprises at least two furnace bodies 1, and the side walls of the two furnace bodies 1 in the first direction are provided with channels communicated with the mounting grooves for moving the jig, wherein the first direction is the horizontal direction in fig. 2;

The guide chain combination device is arranged in the mounting groove and can drive the jig to transport along the first direction, the guide chain combination devices are arranged in the mounting grooves of the two furnace bodies 1, each guide chain combination device comprises two groups of parallel and symmetrically arranged transport assemblies, chain wheel groups are correspondingly arranged on one sides, close to the two groups of transport assemblies, of the two groups of transport assemblies, guide chains 3 are meshed on the chain wheel groups, and supporting parts 4 are arranged on one sides, close to the two guide chains 3, of the two groups of transport assemblies and used for supporting the jig to move;

One set of transport assemblies is adjacent to the first side wall 18 and the other set of transport assemblies can be adjacent to or away from the first side wall 18 in a third direction, which is vertical in fig. 2.

The conveying assembly comprises an inlet plate 6 extending along a first direction, chain wheel groups are correspondingly arranged on the side walls of the two inlet plates 6, which are close to each other, each chain wheel group comprises a first driven chain wheel 7 and a second driven chain wheel 8, and the first driven chain wheels 7 and the second driven chain wheels 8 are respectively and rotatably arranged at two ends of the top of the side wall of the inlet plate 6;

the sprocket group further comprises a driving sprocket 9, an adjustable sprocket 5 and two non-adjustable sprockets 10, wherein the driving sprocket 9, the adjustable sprocket 5 and the two non-adjustable sprockets 10 are all located between the first driven sprocket 7 and the second driven sprocket 8, are sequentially arranged along a first direction and are arranged in a staggered manner along a second direction, and the second direction is the vertical direction in fig. 1.

The guide chain 3 has an inner side and an outer side, the first driven sprocket 7, the second driven sprocket 8, the driving sprocket 9 and the non-adjusting sprocket 10 far from the second driven sprocket 8 are all meshed with the inner side of the guide chain 3, the adjustable sprocket 5 and the non-adjusting sprocket 10 near the second driven sprocket are all meshed with the outer side of the guide chain 3, and the non-adjusting sprocket 10 can tension the guide chain 3 and can standardize the travelling path of the guide chain 3 so as to avoid collision with other parts;

Go into board 6 top and be provided with chain guide track 11 between first driven sprocket 7 and the second driven sprocket 8, chain guide 3 runs through chain guide track 11, and chain guide 3 bottom can with chain guide track 11 contact, chain guide track 11 can support chain guide 3, prevents chain guide 3 because of the radian that self gravity produced, influences the stability of tool transportation.

The adjustable chain wheel 5 can reciprocate along the second direction on the inlet plate 6, and is supported and reset by the flexible compensation device so as to ensure the tension of the guide chain 3;

specifically, offer the movable groove that extends along the second direction on going into board 6, flexible compensation arrangement sets up on going into board 6 and keeping away from the lateral wall of sprocket group, and flexible compensation arrangement includes:

The length direction of the base fixing block 12 extends along the first direction, and is arranged on the side wall of the inlet plate 6 far away from the chain wheel group, and fixing grooves are formed at two ends of the top of the base fixing block 12;

the bottom ends of the two slide bars 13 are respectively connected to the two ends of the top of the base fixing block 12 and are positioned in the fixing groove, and the length directions of the two slide bars 13 extend along the second direction;

The limiting fixed block 14 is arranged on the inlet plate 6 in parallel to the base fixed block 12 and is positioned above the base fixed block 12, fixed grooves are formed in two ends of the bottom of the limiting fixed block 14, and the top ends of the two sliding rods 13 are respectively positioned in the two fixed grooves;

The tensioning support 15 is provided with a cylindrical block and a rectangular block which are fixedly connected, sliding blocks are fixedly arranged on two opposite side walls of the rectangular block, sliding holes are formed in the sliding blocks in a penetrating mode along the second direction, the sliding blocks are connected with the sliding rod 13 in a sliding mode through the sliding holes, and shaft sleeves 28 are arranged on the inner walls of the sliding holes and used for protecting the surfaces of the sliding rod 13;

The cylindrical block is fixedly arranged on the side wall of the rectangular block, which is close to the inlet plate 6, a round hole is formed in the rectangular block in a penetrating manner along a third direction, a high-temperature bearing is arranged in the round hole, a hole retainer ring is arranged in the round hole and used for axially limiting the high-temperature bearing, and the cylindrical block is movably arranged in the movable groove;

the two elastic pieces 16 are respectively sleeved on the outer walls of the two slide bars 13, and the top and the bottom of each elastic piece 16 are respectively connected with the slide block and the base fixing block 12; the elastic member 16 may be selected to be a spring;

The adjustable chain wheel 5 is coaxially and fixedly connected to the side wall of the inner ring of the high-temperature bearing in the round hole.

The feeding plate 6 is provided with holes corresponding to the first driven sprocket 7, the second driven sprocket 8, the driving sprocket 9 and the two non-adjusting sprockets 10 in a penetrating way, a high-temperature bearing is arranged in each hole, the driven sprocket, the driving sprocket 9 and the two non-adjusting sprockets 10 are coaxially and fixedly connected to the inner ring side wall of the high-temperature bearing, and a hole retainer ring is arranged in each hole and used for axially limiting the high-temperature bearing;

the first driven sprocket 7, the second driven sprocket 8, the adjustable sprocket 5 and the two non-adjustable sprockets 10 are all rotatably provided with sprocket shafts 17, the sprocket shafts 17 are close to one end surface of the sprocket set and are provided with a straight groove, the other end of each sprocket shaft penetrates through the inner ring of the high-temperature bearing, the circumferential outer wall of each sprocket shaft is provided with threads, and the high-temperature bearing is locked through nuts and can be limited in axis.

The furnace body 1 is provided with a power device for driving the driving chain wheel 9 to rotate, so that other chain wheels of the chain wheel group and the guide chain 3 can move to convey the jig;

The power device comprises:

A motor 19, the motor 19 being mounted on the first side wall 18 by a motor mount 20, the motor 19 having an output shaft, the output shaft being arranged in a third direction;

One end of the hexagonal shaft 21 is connected with the output shaft through a first coupler 22, and the other end of the hexagonal shaft 21 movably penetrates through the first side wall 18 along the third direction to extend into the mounting groove and sequentially penetrates through the two driving chain wheels 9;

An inner hexagonal through hole matched with the hexagonal shaft 21 is coaxially and penetratingly arranged on the driving sprocket 9;

it should be noted that, the motor support 20 is a U-shaped sheet metal bending structure, and has two first plates parallel to the third direction and two second plates fixedly connected to the first plates and parallel to the first direction, wherein the two first plates have ear plates bent at 90 ° from one end away from the second plates to the direction away from each other, and the ear plates are connected to the first side wall 18 by bolts;

further, the motor 19 is mounted on the side wall of the second plate far away from the first plate through bolts, the motor 19 is provided with an output shaft, the output shaft penetrates through the second plate movably to be connected with the first coupler 22, and one end of the hexagonal shaft 21, which is positioned outside the furnace body 1, is connected with the output shaft of the motor 19 through the first coupler 22, so that torque transmission can be ensured; the first coupling 22 may be selected as a slip coupling;

Further, a magnetic fluid sealing piece 23 is arranged on the outer wall of one end of the hexagonal shaft 21, which is positioned outside the furnace body 1, through holes are formed in the first side wall 18 corresponding to the hexagonal shaft 21, and the magnetic fluid sealing piece 23 is used for sealing the through holes so as to ensure the tightness of the furnace body 1.

The tops of the two ends of the inner wall of the bottom of the mounting groove in the first direction are respectively provided with a sliding rail 24 extending along the third direction, the two ends of the bottom of the inlet plate 6 are respectively provided with a first sliding groove matched with the sliding rails 24, and the two ends of the bottom of the side wall, far away from the two inlet plates 6, are respectively provided with a copper sleeve sliding block 25;

Specifically, on the inlet plate 6 close to the first side wall, two ends of one side of the inlet plate close to the first side wall are respectively provided with a connecting block 29, and the connecting blocks 29 are connected with the top of the copper sleeve sliding block 25 through bolts;

On the plate 6 far away from the first side wall, two ends of one side of the plate away from the first side wall are respectively provided with a connecting plate 30, and the connecting plates 30 are connected with the top of the copper bush sliding block 25 through bolts;

The connection block 29 and the connection plate 30 are both selected as L-shaped plates, and each L-shaped plate is provided with two mounting plates with 90 degrees, wherein one mounting plate is connected with the inlet plate 6 through bolts, and the other mounting plate is connected with the copper sleeve slide block 25 through bolts;

The bottom end surface of the copper bush sliding block 25 is provided with a second sliding groove matched with the sliding rail 24, the copper bush sliding block 25 is in sliding connection with the sliding rail 24, and the inlet plate 6 far away from the first side wall can reciprocate along the sliding rail 24 under the driving of a driving mechanism arranged on the furnace body 1;

Specifically, the driving mechanism comprises a bracket 26, the first side walls 18 of the two furnace bodies 1 are respectively provided with a bracket 26, the driving mechanism further comprises a motor bracket, the motor bracket is arranged on the first side wall 18 of one furnace body 1 and positioned on one side of the upper bracket 26 far away from the other bracket 26, a driving motor 37 is arranged on the side wall of the motor bracket far away from the bracket 26 close to the motor bracket, the driving motor 37 is provided with a driving shaft, the driving shaft is connected with a screw rod 27 through a transmission assembly, one end of the screw rod 27 far away from the transmission assembly movably penetrates through the first side wall 18 along a third direction to extend into a mounting groove and sequentially penetrates through the two inlet plates 6, and the screw rod 27 is in threaded connection with the inlet plate 6 far away from the first side wall 18;

Further, the transmission assembly comprises a rotating rod 31, the rotating rods 31 are arranged in the two brackets 26 along the second direction, two ends of the rotating rod 31 are respectively in rotary connection with the top and bottom side walls of the brackets 26, a first transmission worm wheel 32 and a second transmission worm wheel 33 are fixedly sleeved on the outer wall of the rotating rod 31, and the first transmission worm wheel 32 is positioned above the second transmission worm wheel 33;

Further, a first worm wheel 34 and a second worm wheel 35 are oppositely arranged in the two brackets 26 along the first direction, and the first worm wheel 34 and the second worm wheel 35 are respectively positioned at two sides of the first transmission worm wheel 32 and are meshed with the first transmission worm wheel 32; the driving shaft of the driving motor 37 penetrates through the motor bracket and extends into the motor bracket and is connected with a first worm gear rod through a second coupler, and one end of the first worm gear rod, which is far away from the driving motor 37, is fixedly connected with the first worm gear 34 in a coaxial manner;

The transmission assembly further comprises a transmission rod 36, wherein the transmission rod 36 is arranged along the first direction and is positioned between the two brackets 26, one end of the transmission rod 36 movably penetrates through the bracket 26 close to the driving motor 37 and is fixedly connected with the second worm wheel 35 in the transmission rod, the other end of the transmission rod 36 movably penetrates through the other bracket 26 and is fixedly connected with the first worm wheel 34 in the transmission rod, one side, far away from the transmission rod 36, of the second worm wheel 35 in the bracket 26 is fixedly connected with the second worm wheel rod in a coaxial manner, and one end, far away from the second worm wheel 35 connected with the second worm wheel rod, of the second worm wheel rod penetrates through and extends to the bracket 26 and is externally connected with a hand wheel 37;

A third worm wheel is meshed with one side, close to the first side wall 18, of the two second transmission worm wheels 33, a screw rod 27 is coaxially and fixedly connected with the side wall, far away from the second transmission worm wheels 33, of the third worm wheel, and the screw rod 27 movably penetrates through the first side wall 18, extends into the mounting groove and sequentially penetrates through the two inlet plates 6;

The outer walls of the screw rods 27 are provided with threads, the two inlet plates 6 are provided with mounting holes corresponding to the screw rods 27, the mounting holes of the inlet plates 6 far away from the first side wall 18 are internally provided with threads matched with the outer walls of the screw rods 27, and the inlet plates 6 are in threaded connection with the screw rods 27;

By starting the driving motor 37, the driving shaft drives the first worm wheel rod to rotate and enables the first worm wheel 34 close to the driving motor 37 to rotate, so that under the meshing condition, the rotating rod 31 close to the driving motor 37 and the second worm wheel 35 are driven to rotate, the first worm wheel 34, the second worm wheel 35 and the rotating rod 31 far away from the driving motor 37 rotate under the connecting action of the transmission rod 36, the two rotating rods 31 synchronously rotate, the first transmission worm wheel 32 and the second transmission worm wheel 33 on the two rotating rods synchronously rotate, and therefore the screw rods 27 in the two furnace bodies 1 can synchronously rotate, and meanwhile the entering plates 6 far away from the first side walls 18 in the two furnace bodies 1 are driven to reciprocate along the sliding rails 24.

Working principle: the jig enters an internal installation groove of the furnace body 1 through a channel, a power device is started, an output shaft of a motor 19 rotates, a hexagonal shaft 21 is driven to rotate through a first coupler 22, and as the hexagonal shaft 21 is matched with an inner hexagonal through hole of a driving sprocket 9, the driving sprocket 9 can be driven to rotate, under the meshing condition, the driving sprocket 9 rotates to enable a guide chain 3 to move, and then a first driven sprocket 7, a second driven sprocket 8, an adjustable sprocket 5 and two non-adjustable sprockets 10 rotate, a supporting part 4 on the guide chain 3 is driven to synchronously move in the moving process of the guide chain 3, the jig can be driven by the supporting part 4 to be transported along a first direction, and the two non-adjustable sprockets 10 can tension the guide chain 3 and can standardize the advancing path of the guide chain 3;

The adjustable chain wheel 5 can reciprocate in the second direction, the flexible compensation device arranged on the feeding plate 6 can reset the adjustable chain wheel 5, the tensioning support 15 is displaced along with the displacement of the adjustable chain wheel 5, the tensioning support 15 is reset under the action of the elastic force of the elastic piece 16 sleeved on the sliding rod 13, so that the adjustable chain wheel 5 is driven to reset, the adjustable chain wheel 5 and the flexible compensation device jointly play a compensation role, the tensioning work of the guide chain 3 is carried out at any time, the problem that the guide chain 3 is tripped or blocked due to the fact that the length of the guide chain 3 is increased or reduced due to temperature is solved, and stable transportation working conditions can be maintained;

Through setting up the guide chain track 11 at the income board 6 top, can support the guide chain 3, prevent that the guide chain 3 from influencing the stability of tool transportation because of the radian that self gravity produced.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (10)

1. A vacuum reflow soldering oven chain drive structure, comprising:

The furnace comprises a furnace body (1), wherein the top of the furnace body (1) is provided with an opening, a sealing cover (2) is movably arranged, and a mounting groove communicated with the opening is formed in the furnace body (1);

The guide chain combination device is arranged in the mounting groove and used for driving the jig to transport along the first direction, the guide chain combination device comprises two groups of parallel and symmetrically arranged transport assemblies, chain wheel groups are correspondingly arranged on the sides, close to the two groups of transport assemblies, of the two groups of transport assemblies, guide chains (3) are arranged on the chain wheel groups in a meshed manner, and supporting parts (4) are arranged on the sides, close to the two guide chains (3), of the two guide chains and used for supporting the jig;

The sprocket set comprises an adjustable sprocket (5) movable in a second direction, the second direction being perpendicular to the first direction;

The flexible compensation device is arranged on one side, far away from the chain wheel group, of the conveying assembly and corresponds to the adjustable chain wheel (5) and is used for supporting and resetting the adjustable chain wheel (5) so as to ensure the tensioning force of the guide chain (3).

2. A chain transmission structure of a vacuum reflow soldering oven according to claim 1, wherein the transport assembly comprises an inlet plate (6) extending in the first direction, and two groups of the chain wheels are respectively and correspondingly arranged on the side walls of the two inlet plates (6) close to each other;

The chain wheel set further comprises a first driven chain wheel (7) and a second driven chain wheel (8), and the first driven chain wheel (7) and the second driven chain wheel (8) are respectively arranged at two ends of the top of the side wall of the inlet plate (6);

The chain wheel set further comprises a driving chain wheel (9) and two non-adjusting chain wheels (10) which are arranged between the first driven chain wheel (7) and the second driven chain wheel (8), the driving chain wheel (9) and the two non-adjusting chain wheels (10) are sequentially arranged on the inlet plate (6) along the first direction, the driving chain wheel (9) and the two non-adjusting chain wheels (10) are arranged in a staggered mode in the second direction, and the adjustable chain wheel (5) is arranged between the driving chain wheel (9) and the non-adjusting chain wheels (10) which are far away from the second driven chain wheel (8).

3. The chain transmission structure of the vacuum reflow soldering furnace according to claim 2, wherein the inlet plate (6) is provided with holes corresponding to the first driven sprocket (7), the second driven sprocket (8), the driving sprocket (9) and the two non-adjusting sprockets (10), and high-temperature bearings are arranged in the holes, and the first driven sprocket (7), the second driven sprocket (8), the driving sprocket (9) and the two non-adjusting sprockets (10) are coaxially and fixedly connected to the inner ring side wall of the high-temperature bearings, and hole check rings are arranged in the holes and used for axially limiting the high-temperature bearings.

4. A vacuum reflow soldering oven chain transmission structure in accordance with claim 3, wherein the guide chain (3) has an inner side and an outer side, the first driven sprocket (7), the second driven sprocket (8), the driving sprocket (9) and the non-adjusting sprocket (10) remote from the second driven sprocket (8) are all engaged with the inner side of the guide chain (3), and the adjustable sprocket (5) and the non-adjusting sprocket (10) close to the second driven sprocket (8) are all engaged with the outer side of the guide chain (3);

The top of the entering plate (6) is positioned between the first driven sprocket (7) and the second driven sprocket (8) and provided with a chain guide rail (11), and the chain guide (3) penetrates through the chain guide rail (11).

5. The chain transmission structure of a vacuum reflow soldering oven of claim 4, wherein the flexible compensation means comprises:

A base fixing block (12) which extends in the first direction in the length direction and is mounted on a side wall of the inlet plate (6) away from the sprocket group;

The bottom ends of the two sliding rods (13) are respectively connected to the two ends of the top of the base fixing block (12), and the two sliding rods (13) are arranged in an extending mode along the second direction;

The limiting fixed block (14) is arranged parallel to the base fixed block (12), and two ends of the bottom of the limiting fixed block are respectively connected with the top ends of the two sliding rods (13);

The tensioning support (15) is provided with a cylindrical block and a rectangular block which are fixedly connected, sliding blocks are fixedly arranged on two opposite side walls of the rectangular block, sliding holes are formed in the sliding blocks in a penetrating mode along the second direction, and the sliding blocks are connected with the sliding rods (13) in a sliding mode through the sliding holes;

The cylindrical block is fixedly arranged on the side wall of the rectangular block, which is close to the inlet plate (6), and a round hole is formed in the rectangular block in a penetrating manner along a third direction, a high-temperature bearing is arranged in the round hole, a hole retainer ring is arranged in the round hole and used for axially limiting the high-temperature bearing, and the third direction is perpendicular to the second direction and the first direction;

The two elastic pieces (16) are respectively sleeved on the outer walls of the two sliding rods (13), and the top and the bottom of each elastic piece (16) are respectively connected with the sliding block and the base fixing block (12).

6. The chain transmission structure of the vacuum reflow soldering furnace according to claim 5, wherein the inlet plate (6) is provided with a movable groove extending along the second direction, the cylindrical block is movably arranged in the movable groove, and the adjustable chain wheel (5) is coaxially and fixedly connected to the side wall of the inner ring of the high-temperature bearing in the round hole;

The novel high-temperature bearing is characterized in that a chain wheel shaft (17) is rotatably arranged on the first driven chain wheel (7), the second driven chain wheel (8), the adjustable chain wheel (5) and the two non-adjustable chain wheels (10), a straight groove is formed in the surface of one end, close to the chain wheel group, of the chain wheel shaft (17), the other end penetrates through the inner ring of the high-temperature bearing, threads are arranged on the circumferential outer wall of the inner ring of the high-temperature bearing, and the inner ring of the high-temperature bearing is locked through nuts.

7. A chain transmission structure of a vacuum reflow soldering oven according to claim 6, wherein the oven body (1) is provided with a power device for driving the driving sprocket (9) to rotate, the oven body (1) has a first sidewall (18), the first sidewall (18) is parallel to the first direction, the power device comprises:

-a motor (19), the motor (19) being mounted on the first side wall (18) by means of a motor mount (20), the motor (19) having an output shaft, and the output shaft being arranged in the third direction;

One end of the hexagonal shaft (21) is connected with the output shaft through a first coupler (22), and the other end of the hexagonal shaft (21) movably penetrates through the first side wall (18) along the third direction, extends into the mounting groove and sequentially penetrates through the two driving chain wheels (9);

an inner hexagonal through hole matched with the hexagonal shaft (21) is coaxially and penetratingly arranged on the driving chain wheel (9).

8. The chain transmission structure of the vacuum reflow soldering oven according to claim 7, wherein the power device further comprises a magnetic fluid sealing member (23) sleeved on the outer wall of the hexagonal shaft (21), and the magnetic fluid sealing member (23) is located outside the oven body (1) and used for guaranteeing the tightness of the oven body (1).

9. The chain transmission structure of the vacuum reflow soldering furnace according to claim 8, wherein sliding rails (24) extending along the third direction are arranged on the top of the two ends of the inner wall of the bottom of the mounting groove in the first direction, and first sliding grooves matched with the sliding rails (24) are formed in the two ends of the bottom of the entering plate (6);

Copper bush sliding blocks (25) are arranged at two ends of the bottom of the side wall, away from the inlet plate (6), of each inlet plate, second sliding grooves matched with the sliding rails (24) are formed in the copper bush sliding blocks (25), and the copper bush sliding blocks (25) are connected with the sliding rails (24) in a sliding mode.

10. A chain transmission structure of a vacuum reflow soldering oven according to claim 9, wherein the entrance plate (6) far away from the first side wall (18) can reciprocate along the slide rail (24) in the mounting groove by a driving mechanism, the driving mechanism comprises a driving motor (37) arranged on the first side wall (18) by a bracket (26), a driving shaft of the driving motor (37) extends into the bracket (26) and is connected with a screw rod (27) by a transmission component, one end of the screw rod (27) far away from the bracket (26) movably penetrates through the first side wall (18) to the mounting groove along the third direction and sequentially penetrates through two entrance plates (6), and the screw rod (27) is in threaded connection with the entrance plate (6) far away from the first side wall (18).