CN114309936B

CN114309936B - Metal splice chain clamping and welding device

Info

Publication number: CN114309936B
Application number: CN202111663431.2A
Authority: CN
Inventors: 罗钦杨
Original assignee: Shenzhen Luofuxin Technology Co ltd
Current assignee: Shenzhen Luofuxin Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2024-04-12
Anticipated expiration: 2041-12-31
Also published as: CN114309936A

Abstract

The invention provides a metal chain splicing clamping and welding device which comprises a driving mechanism, a chain conveying mechanism, a chain guiding mechanism, a chain clamping mechanism and a welding mechanism, wherein the driving mechanism is used for driving a chain to move along a chain path: the chain conveying mechanism comprises a pushing device, a pressing device rotatably connected with the pushing device and a chain conveying claw which is fixed on the pressing device and used for pushing the metal chain to move, and the pressing device is also connected with an output shaft of the driving mechanism; the chain guide mechanism comprises a base and a chain guide groove die, wherein the base is arranged corresponding to the chain feeding claw, the chain guide groove die is arranged on the base, and a chain guide groove for limiting a metal chain is arranged on the chain guide groove die; the chain clamping mechanism comprises a pushing device connected with an output shaft of the driving mechanism and a compressing device rotatably arranged on two sides of the base and pushed by the pushing device to rotate so as to compress the metal chain; the welding mechanism comprises a support frame fixed on the frame and a welding device arranged on the support frame and corresponding to the chain guide groove. The invention does not need air source driving and has extremely high production efficiency.

Description

Metal splice chain clamping and welding device

Technical Field

The invention belongs to the technical field of jewelry processing, and particularly relates to a metal split chain clamp welding device.

Background

At present, in the domestic gold jewelry industry, because the automatic production efficiency of the woven chains is high, the cost is low, and light-weight products can be produced, the product is sold by gold jewelry which is currently mainstream, the two woven chains are spliced together, the product can be more atmosphere, more choices are available on matched products, and the product is a product which is hot in the market and is not required for long-term supply. The production of the existing double-spliced chain is generally carried out by a manual welding or automatic welding method, the manual welding is carried out by workers to enable a fire gun to carry out manual welding, the production efficiency of the mode is very low, the color formation of gold products is difficult to ensure by adopting welding powder for welding, and the requirements of people on gold ornaments at present are difficult to meet.

The conventional automatic welding with more use generally adopts an air cylinder, an electromagnetic valve and the like as power sources for driving welding, the driving of the air cylinder and the electromagnetic valve is greatly influenced by an air source, and when the whole production line is provided with a plurality of air cylinders and electromagnetic valves, the mutual interference is large, so that the processing efficiency is influenced, and in addition, the driving efficiency of the air cylinder is low, so that the requirement of high-speed operation cannot be met. Moreover, in the prior art, the automatic welding of the welding device is mostly controlled through electricity, and because the electricity has the system defect which can not be overcome, the defective rate of the processing is increased, and the quality and the efficiency of the processing are further affected.

Disclosure of Invention

The invention aims to provide a metal split chain clamping welding device which does not need air source driving and has extremely high production efficiency aiming at the defects of the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme:

a metal splice chain clamping and welding device comprises a driving mechanism, a chain conveying mechanism, a chain guiding mechanism, a chain clamping mechanism and a welding mechanism:

a drive mechanism for powering the chain feed mechanism and the chain clamping mechanism;

the chain conveying mechanism is used for pushing the metal chain to move to the next welding point and comprises a pushing device, a pressing device rotatably connected with the pushing device and a chain conveying claw which is arranged on the pressing device and used for pushing the metal chain to move, and the pressing device and the pushing device are also connected with the driving mechanism;

the chain guide mechanism is used for guiding and limiting a metal chain and providing a welding platform for the metal chain, and comprises a base and a chain guide groove die, wherein the base is arranged corresponding to the chain feeding claw, the chain guide groove die is arranged on the base, and a chain guide groove for guiding and limiting the metal chain is arranged on the chain guide groove die;

the chain clamping mechanism is used for clamping the metal chain in the chain guide groove and comprises a pushing device connected with an output shaft of the driving mechanism and a pressing device which is rotatably arranged on two sides of the base and is pushed by the pushing device to rotate so as to press the metal chain in the chain guide groove;

The welding mechanism is used for welding the metal chains in the chain guide grooves and is arranged corresponding to the chain guide grooves;

the metal chain to be splice welded is introduced into the chain guide groove, the driving mechanism rotates to drive the pushing device to move in the direction close to the metal chain, the pushing device pushes the clamping device, the clamping device is forced to rotate to press the metal chain in the chain guide groove, the welding mechanism welds the metal chain in the chain guide groove, then the driving mechanism drives the pushing device to move away from the metal chain, the pressing device resets to loosen the metal chain along with the pushing device, then the driving mechanism drives the pushing device to push the chain feeding claw to move to the metal chain in the chain guide groove, the pressing device rotates under the driving of the driving mechanism to drive the chain feeding claw on the pushing device to rotate to press the metal chain, and the pushing device continues to move to push the chain feeding claw on the pressing device and the metal chain pressed by the chain feeding claw to advance to the next welding point.

Further, the propelling device comprises a first eccentric wheel connected with the driving mechanism, a first connecting rod mechanism, a first connecting block and a push rod, one end of the first connecting rod mechanism is hinged with the first eccentric wheel, the other end of the first connecting block is hinged with the first connecting block, the push rod is fixedly connected with the first connecting block, and the pressing device is rotatably connected with the push rod.

Further, the propelling device further comprises at least two first guide rails arranged on the frame, the push rod is slidably arranged in the at least two first guide rails, and the at least two first guide rails are respectively arranged at two ends of the push rod.

Further, the driving mechanism comprises at least one motor, and the pushing device and the pressing device are connected with the same motor of the driving device, or the pushing device and the pressing device are respectively connected with different motors of the driving device.

Further, the pressing device comprises a first cam sleeved on an output shaft of the driving mechanism, a lifting mechanism with one end in contact with the first cam, a first lever mechanism with one end connected with the other end of the lifting mechanism, and a chain feeding claw swing rod which is correspondingly arranged with the other end of the first lever mechanism, wherein one end of the chain feeding claw swing rod, far away from the first lever mechanism, is connected with the frame through a third elastic component, the chain feeding claw swing rod is separately arranged with the first lever mechanism, a rotating shaft is fixedly arranged on the chain feeding claw swing rod, the rotating shaft is rotatably arranged in the pushing device, the chain feeding claw is arranged on the rotating shaft, when one end of the first lever mechanism is pushed to rotate in one direction by the lifting mechanism, the other end of the first lever mechanism rotates to press the chain feeding claw in the opposite direction, and the chain feeding claw swing rod is forced to rotate so as to drive the rotating shaft and the chain feeding claw on the rotating shaft to rotate so as to press the metal chain.

Further, elevating system includes along radial setting of first cam second guide rail in the frame, sliding connection be in slider in the second guide rail, one end with the connecting rod that the slider is connected, the lift arm of being connected with the other end of connecting rod and set up the first roller component of keeping away from the one end of connecting rod on the lift arm, first roller component is connected with the tread contact of first cam the one end that is close to on the lift arm still is provided with the second roller component first cam pivoted in-process, first cam passes through first roller component drive the lift arm with the second roller component is straight reciprocating motion along the second guide rail.

Further, the lifting mechanism further comprises a limiting device, the limiting device comprises a first elastic component, one end of the first elastic component is connected with the connecting rod, the other end of the first elastic component is connected with the frame, the first elastic component is arranged in the process that the connecting rod reciprocates on the second guide rail, and the first elastic component is always in a stretching state so that the first cam is always in contact connection with the first roller assembly under elastic acting force.

Further, the first roller assembly comprises a first nut fixed on the end of the first lever, a first screw rod connected with the first nut through threads, a first roller seat fixedly connected with the first screw rod, and a first roller rotatably arranged in the first roller seat, wherein the roller surface of the first roller is in contact connection with the roller surface of the first cam.

Further, the first lever mechanism comprises a first lever rotatably arranged on the frame, a jacking block arranged at one end of the first lever and in contact connection with the lifting mechanism, a third nut arranged at the other end of the first lever and an adjusting screw in threaded connection with the third nut, wherein the adjusting screw extends towards the direction of the chain feeding claw swing rod, and when the low-point working surface of the first cam is in contact connection with the lifting mechanism, the adjusting screw is not in contact with the chain feeding claw swing rod, when the high-point working surface of the first cam is in contact connection with the lifting mechanism, the lifting mechanism pushes the first lever, the adjusting screw arranged at the other end of the first lever presses the chain feeding claw swing rod, and the chain feeding claw swing rod is forced to rotate to drive the rotating shaft and the chain feeding claw on the rotating shaft.

Further, the first lever is connected with the lifting device through a second elastic component, one end of the second elastic component is connected with the first lever, the other end of the second elastic component is connected with the lifting mechanism, and the second elastic component is in a stretching state.

Further, a third roller for reducing hard friction is arranged at one end of the chain feeding claw swing rod, which corresponds to the first lever, and the diameter of the third roller is larger than the width of the chain feeding claw swing rod.

Further, the base includes the annular first chassis of fixing in the frame, along circumference setting up annular slide on first chassis and the annular second chassis of slip joint in the slide, first chassis with the second chassis is still through pin fixed connection, loosens the pin, the second chassis is in can rotate on the first chassis, wherein, be provided with a plurality of chain guide groove mould installing ports along its circumference on the second chassis, the chain guide groove mould sets up in chain guide groove mould installing port department.

Further, the chain guide groove die comprises a welding work platform fixed on the base, a guide plate assembly arranged on the welding work platform and used for guiding the metal chain, and a movable template assembly arranged on the welding work platform and used for limiting the metal chain, wherein the movable template assembly is positioned at the downstream of the guide plate assembly.

Further, the guide plate assembly comprises a first guide plate seat clamped on one side of the base, a second guide plate seat clamped on the opposite side of the base, a first guide plate fixed on the first guide plate seat and a second guide plate fixed on the second guide plate seat, threaded holes are formed in the first guide plate seat and the second guide plate seat, a reverse tooth screw rod sequentially penetrates through the threaded holes in the first guide plate seat, the through holes in the second chassis and the threaded holes in the second guide plate seat to connect the three, the reverse tooth screw rod is screwed in one direction, the first guide plate seat and the second guide plate seat do movement close to each other, the reverse tooth screw rod is screwed in the reverse direction, and the first guide plate seat and the second guide plate seat do movement far away from each other.

Further, the first guide plate and the second guide plate are arranged in a splayed shape, a guide groove for the metal chain to pass through is formed at the interval between the first guide plate and the second guide plate, and the width of the guide groove gradually decreases along with the approach of the movable template component.

Further, the movable template assembly comprises a template seat, a first movable template and a second movable template, wherein the template seat is arranged on the welding work platform and positioned at the downstream of the guide plate assembly, the first movable template and the second movable template are movably arranged on the template seat, and the first movable template and the second movable template are arranged on the template seat at intervals, and a chain guide groove for limiting a metal chain is formed at intervals between the first movable template and the second movable template.

Further, the template seat is connected with the first movable template and the second movable template through fastening screws respectively, strip-shaped adjusting holes are formed in the first movable template and the second movable template, the fastening screws penetrate through the adjusting holes to connect the first movable template with the template seat and the second movable template with the template seat, the first movable template or the second movable template is moved along the length direction of the adjusting holes, and therefore the distance between the first movable template and the second movable template can be adjusted, and the width of the chain guide groove can be adjusted.

Further, guide plate is still provided with at the upper reaches of leading positive board subassembly, guide plate keep away from the one end downward sloping setting of leading positive board subassembly and guide plate be close to the one end of leading positive board subassembly with the base is tangent, still is provided with the arc of supplying the welding to accomplish to lead out the groove at movable mould board subassembly's low reaches, the arc is led out the groove and is fixed on the base.

Further, the pushing device comprises a second cam sleeved on an output shaft of the driving mechanism and a second lever mechanism with one end selectively contacted and connected with the second cam, in the rotation process of the second cam, a low-point working surface of the second cam is not contacted with one end of the second lever mechanism, when the second cam gradually rotates to a high-point working surface on the second cam to be contacted and connected with one end of the second lever mechanism, the second cam presses one end of the second lever mechanism in a direction far away from the metal chain, and the other end of the second lever mechanism moves close to the metal chain to push the pressing device to rotate and press the metal chain in the chain guide groove.

Further, the second lever mechanism comprises a second lever rotatably arranged on the frame, a third roller assembly arranged at one end of the second lever and selectively contacted and connected with the second cam, and a push rod arranged at the other end of the second lever, a low-point working surface of the second cam is not contacted with the third roller assembly in the rotation process, a high-point working surface of the second cam presses the third roller assembly, the third roller assembly is pressed to drive the second lever to rotate, and a push rod at the other end of the second lever is driven to move close to the metal chain, so that the pushing device is pushed to compress the metal chain in the chain guide groove.

Further, one end of the ejector rod facing the pressing device is in a conical shape, and the cross section size of the ejector rod gradually decreases along with the approaching of the pressing device.

Further, the compressing device comprises a first swing arm rotatably arranged on one side of the base, a second swing arm rotatably arranged on the opposite side of the base, a first clamping knife arranged on one end of the first swing arm, which is far away from the jacking device and used for compressing a metal chain on one side in the chain guide groove, and a second clamping knife arranged on one end of the second swing arm, which is far away from the jacking device and used for compressing the metal chain on the other side in the chain guide groove, wherein the first swing arm and the second swing arm are of V-shaped structures and are oppositely and symmetrically arranged, the chain guide groove is positioned in the interval between the first swing arm and the second swing arm, a crack is formed between the end part, which is close to the pushing device, of the first swing arm and the end part, which is close to the pushing device, of the second swing arm, and when the pushing device pushes the first swing arm and the second swing arm upwards from the crack, the first clamping knife positioned at the other end of the first swing arm and the second clamping knife positioned at the second swing arm are pushed simultaneously to rotate oppositely so as to compress the metal chain in the chain guide groove from two sides.

Further, a sliding wheel is rotatably arranged at the end part of the first swing arm, which is close to the pushing device, and the end part of the second swing arm, which is close to the pushing device.

Further, the end part of the first swing arm, which is close to the pushing device, is connected with the end part of the second swing arm, which is close to the pushing device, through a third elastic component, and when the pushing device pushes the first swing arm and the second swing arm, the third elastic component is in a stretching state, so that the pushing device moves in the crack towards the direction close to the metal chain, and the pushing device is always in contact connection with the end parts of the first swing arm and the second swing arm.

Further, a third guide rail is further arranged on the frame, the pressing device is slidably connected in the third guide rail through a moving block, the pressing device is further selectively connected with the pushing device, a fixing rod extending towards the direction of the pressing device is further arranged on the pushing device, when the pushing device is required to be connected with the pressing device, the fixing rod is connected with the moving block through a fastening piece, when the pressing device is not connected with the pushing device, the connection between the fixing rod and the moving block is disconnected, and the moving card is fixed in the third guide rail.

Further, the welding mechanism comprises a support frame arranged on the frame and a welding part fixed on the support frame and arranged corresponding to the metal chain in the chain guide groove.

Further, one end of the supporting frame is rotatably arranged on the frame through a pin shaft, and the welding part is fixed on the other end of the supporting frame.

28. The metal splice chain pinch welding apparatus of claim 27, wherein the welding mechanism further comprises a pushing device for pushing the support frame to rotate.

Further, two opposite sides of the support frame are respectively connected with the frame through fourth elastic components, and the fourth elastic components are used for limiting free rotation of the support frame and helping the support frame to reset.

Further, the pushing device comprises a second eccentric wheel connected with the driving mechanism, a second connecting rod mechanism with one end hinged with the second eccentric wheel, and a pushing rod hinged with the other end of the second connecting rod mechanism, a third guide rail is further arranged on the frame, the pushing rod is slidably arranged in the third guide rail, the pushing rod is driven to reciprocate in the third guide rail by the second connecting rod mechanism in the process of rotation of the second eccentric wheel, the pushing rod moves towards the direction of the supporting frame or away from the supporting frame, and when the pushing rod moves towards the direction of the supporting frame to the limit position, the pushing rod pushes the supporting frame to rotate, so that the welding device on the pushing rod is driven to weld other welding spots on the metal chain.

Compared with the prior art, the invention has the beneficial effects that:

1) The invention adopts pure mechanical transmission, does not need components such as an air cylinder, an electromagnetic valve and the like, solves the problems of influence and interference caused by the instability of an air source, can drive the whole device to operate by one motor, and has the operating efficiency which is greatly improved by the rotating speed of the motor; in addition, the invention overcomes the control defect problem of the traditional electric control system due to pure mechanical transmission, greatly reduces the defective rate and greatly improves the production efficiency and the processing precision;

2) The chain feeding mode is flexible, a chain feeding claw can be adopted to push the metal chains to advance, in addition, in order to prevent the two metal chains to be splice welded from being misplaced to influence the processing quality under the pushing of the chain feeding claw after the production for a period of time, a pressing device can be used for pressing the metal chains, and then the metal chains can be pushed to advance to the next welding point by pushing the pressing device;

3) The invention can realize multi-point welding by pushing the support frame to rotate, thereby further improving the welding efficiency and flexibility.

Drawings

FIG. 1 is a front view of a metal splice chain pinch welding device according to an embodiment of the present invention;

FIG. 2 is a top view of a metal splice chain pinch welding device according to an embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of the pressing device in the J-J direction of FIG. 2;

FIG. 4 is a partial cross-sectional view of the pressing device in the direction A-A of FIG. 1;

FIG. 5 is a schematic structural view of a guide plate assembly of a metal splice chain clamping device according to an embodiment of the present invention;

fig. 6 is a partial cross-sectional view of the compression device of fig. 1 taken along A-A.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. In the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention.

The invention will be further illustrated, but is not limited, by the following examples.

As shown in fig. 1 and 2, the invention provides a metal splice chain clamping and welding device, which comprises a driving mechanism, a chain conveying mechanism, a chain guiding mechanism, a chain clamping mechanism and a welding mechanism. The driving mechanism is used for providing power for the chain feeding mechanism and the chain clamping mechanism, in the embodiment, the driving mechanism comprises a motor and a transmission mechanism connected with the motor, the transmission mechanism can be a driving synchronous pulley connected with an output shaft of the motor, a driven synchronous pulley 100 connected with the driving synchronous pulley through a synchronous belt, a wheel shaft 101 of the driven synchronous pulley 100 is rotatably arranged on the frame, and the wheel shaft 101 of the driven synchronous pulley 100 is used as an output shaft of the driving mechanism and used for driving the chain feeding mechanism and the chain guiding mechanism to move. Of course, other transmission mechanisms, such as chain sprockets, etc., that perform the same function may be selected in other embodiments.

The chain feeding mechanism comprises a pushing device, a pressing device rotatably connected with the pushing device, and a chain feeding claw 225 fixed on the pressing device and used for pushing the metal chain to move. The propulsion device comprises a first eccentric wheel 200, a first connecting rod mechanism 201, a connecting block 202 and a push rod 203, wherein one end of the first connecting rod mechanism 201 is hinged with the first eccentric wheel 200, the connecting block 202 is hinged with the other end of the first connecting rod mechanism 201, and the push rod 203 is fixedly connected with the connecting block 202. If the structure of the device is to be simplified, the first eccentric wheel 200 can be connected with the wheel axle 101 of the driven synchronous pulley 100 through another transmission mechanism, and the eccentric wheel 200 is driven to rotate through the wheel axle 101 of the driven synchronous pulley 100; if more precise control is desired, the drive mechanism further comprises a separate motor, with which the first eccentric 200 is connected, by means of which the first eccentric 200 is driven in rotation. The first link mechanism includes a first link having one end hinged to the first eccentric wheel 200 and a second link having the other end hinged to the other end of the first link, the other end of the second link being hinged to the connection block 202, and the push rod 203 is horizontally fixed to the connection block 202. When the first eccentric wheel 200 rotates, the first eccentric wheel drives the connecting block 202 and the push rod 203 to do horizontal reciprocating motion through the first connecting rod and the second connecting rod. In order to make the reciprocating movement of the push rod 203 smoother, the pushing device further comprises a first guide rail 204 arranged on the frame, and the push rod 203 is slidably arranged in the first guide rail 204. In order to prevent the first eccentric wheel 200 from driving the push rod 203 to move when rotating at a high speed so that the push rod 203 generates tremble in a vertical direction to affect the processing precision, at least two first guide rails 204 may be provided, in this embodiment, in order to simplify the device structure, the pushing device includes two first guide rails 204, the push rod 203 is slidably provided in the two first guide rails 204, and the two first guide rails 204 are separately provided at two ends of the push rod 203 so that the two first guide rails 204 limit the push rod 203 at two sides, thereby not only ensuring that the push rod 203 moves more stably in a horizontal direction, but also preventing the end of the push rod 203 far away from the first eccentric wheel 200 from generating more obvious tremble to affect the processing precision in the process of high-speed operation.

Referring to fig. 3 and 4, the pressing device includes a first cam 205 sleeved on the wheel shaft 101 of the driven synchronous pulley 100, a lifting mechanism in contact with the first cam 205, a first lever mechanism with one end connected with the lifting mechanism, and a chain claw swing rod 206 corresponding to the other end of the first lever mechanism. The first cam 205 is sleeved on the wheel shaft 101 of the driven synchronous pulley 100 in a tight fit mode, and the driven synchronous pulley 100 rotates to drive the first cam 205 to rotate. The lifting mechanism comprises a second guide rail 207 arranged on the frame along the radial direction of the first cam 205, a sliding block 208 slidingly connected in the second guide rail 207, a connecting rod 209 with one end connected with the sliding block 208, a lifting arm 210 connected with the other end of the connecting rod 209, a first roller assembly arranged on the lifting arm 210 at one end far away from the connecting rod 209 and in contact connection with the first cam 205, and a second roller assembly arranged on the lifting arm 210 at one end close to the connecting rod 209. In the present embodiment, the first roller assembly includes a first nut 211 fixed on an end of the lifting arm 210 remote from the connecting rod 209, a first screw 212 screwed with the first nut 211, a first roller seat 213 fixedly connected with the first screw 212, and a first roller 214 rotatably provided in the first roller seat 213 and in contact with the first cam 205. In actual use, the extension length of the first screw 212 in the first nut 211 may be adjusted according to the minimum radius of the first cam 205 so that the tread of the first roller 214 is always in contact with the tread of the first cam 205, specifically, the first screw 212 is screwed so that the distance between the axis of the first roller 214 and the axis of the first cam 205 is equivalent to the minimum radius of the first cam 205, so that the first cam 205 is always in contact with the first roller 214 during rotation. The first cam 205 can drive the first roller 214, the lifting arm 210 and the connecting rod 209 to reciprocate up and down in the second guide rail 207 during rotation due to the structural characteristics thereof; specifically, when the low-point working surface of the first cam 205 is gradually turned from the high-point working surface thereon to contact the first roller 214, the first cam pushes the first roller 214 upward, so that the lifting arm 210 connected to the first roller 214 and the second roller assembly connected to the lifting arm 210 also move upward along the second rail 207, and when the high-point working surface of the first cam 205 is gradually turned from the low-point working surface thereon to contact the first roller 214, the first cam 205 drives the first roller 214, the lifting arm 210 and the second roller assembly to move downward along the second rail 207. In order to prevent the jump or vibration between the first roller 214 and the first cam 210 during the high-speed rotation, the lifting mechanism further includes a limiting device, which includes a first elastic member, in this embodiment, the first elastic member may be a spring, one end of which is connected to the connecting rod 209, and the other end of which is connected to the frame below the connecting rod. In order to ensure that the first roller 214 always keeps in contact with the first cam 210, the spring is set to be in a stretched state all the time when the connecting rod 209 moves up and down to a limit position in the second guide rail 207, so that the tension generated by the spring acts on the first roller 214 through the connecting rod 209 and the lifting arm 210, and the first roller 214 always closely adheres to the wheel surface of the first cam 205 under the action of the tension of the spring and the gravity of the first roller.

The lifting arm 210 is further provided with a second roller assembly at one end close to the connecting rod 209, the second roller assembly has a structure similar to that of the first roller assembly, the second roller assembly comprises a second nut 215 fixed on the lifting arm 210 at one end close to the connecting rod 209, a second screw 216 connected with the second nut 215 through threads, a second roller seat 217 fixedly connected with the second screw 216, and a second roller 218 rotatably arranged in the second roller seat 217, and the second roller 218 is in contact connection with the first lever mechanism. In the present embodiment, the first lever mechanism includes a first lever 219 rotatably provided on the frame, a top block 220 provided at one end of the first lever 219 in contact with and connected to the second roller 218, a third nut 221 provided at the other end of the first lever 219, and an adjustment screw 222 screwed with the third nut 221. The first lever 219 is rotatably provided to the frame by a pin or the like. In order to ensure that the second roller 218 is in effective contact with the top block 220, a second spring is further provided, one end of the second spring is connected with the first lever 219, and the other end of the second spring is connected with the lifting arm 210, so that the second roller 218 is always in contact connection with the top block 220 through elastic acting force of the second spring. The extension length of the adjusting screw 222 in the third nut 221 is adjusted according to actual needs, specifically, the extension length of the adjusting screw 222 is as follows: when the low-point working surface of the first cam 205 is in contact connection with the first roller 214, the lifting arm 210 is lowered to the limit position at this time, the adjusting screw 222 is not in contact with the chain claw swing link 206, and when the high-point working surface of the first cam 205 is in contact with the first roller 2, the lifting arm 210 is raised to the limit position at this time, and the adjusting screw 222 presses the chain claw swing link 206 downward. After the adjustment is completed, when the first roller 214 moves downward under the drive of the first cam 205, the lifting arm 210 connected with the first roller 214 drives the connecting rod 209 and the sliding block thereon to move downward in the second guide rail 207, correspondingly, the second roller 218 also drives the first lever 219 to rotate downward, the adjusting screw 222 at the other end of the first lever 219 rotates upward, and at this time, the adjusting screw 222 is not in contact with the chain claw swing rod 206; when the high-point working surface of the first cam 210 contacts with the first roller 214, the first roller 214 drives the lifting arm 210 and the second roller 218 to lift, the second roller 218 lifts and pushes the first lever 219 to rotate upwards, and the adjusting screw 222 at the other end of the first lever 219 rotates downwards to press the chain claw swing rod 206. In order to facilitate the rotation of the chain claw swing link 206, a rotating shaft 223 is fixed in the middle of the chain claw swing link 206, a bearing is sleeved on the rotating shaft 223, a bearing seat 224 is arranged on the push rod 203 of the propulsion device, and the bearing is arranged in the bearing seat 224. In order to facilitate the free rotation of the rotating shaft, the rotating shaft 223 is rotatably arranged in the bearing 224 in a penetrating way, the rotating shaft 223 is rotatably arranged in the chain feeding claw mounting seat 224, and the chain feeding claw 225 is fixed on the rotating shaft and is driven to rotate by the rotating shaft 223. When the adjusting screw 222 presses the chain claw swing link 206 downward, the chain claw swing link 206 and the rotating shaft 223 thereon rotate to drive the chain claw 225 to rotate and press on the metal chain. When the adjusting screw 222 is separated from the chain feeding claw, in order to facilitate automatic reset of the chain feeding claw swing rod 206, a third elastic component is arranged at one end of the chain feeding claw swing rod 206 away from the adjusting screw, in this embodiment, the third elastic component is a tension spring 226, one end of the tension spring 226 is connected with the chain feeding claw swing rod 206, the other end of the tension spring 226 is connected with the frame, and when the adjusting screw 222 is separated from the chain feeding claw swing rod 206, the chain feeding claw swing rod 206 can be automatically reset under the action of the tension spring 226. In addition, when the first lever 219 is provided with the end of the adjusting screw 222 to rotate downwards, in order to prevent the chain claw swing link 206 from wearing the bottom surface of the first lever 219, a third roller 227 is provided at the end of the chain claw swing link 206 near the adjusting screw 222, the diameter of the third roller is larger than the width of the chain claw swing link, so that when the adjusting screw 222 rotates downwards to press the chain claw swing link 206, the third roller 227 contacts with the bottom surface of the first lever 219, and the direct contact of the chain claw swing link 206 and the first lever 219 is avoided, thereby reducing the hard friction to the first lever 219.

Referring to fig. 1, the chain guide mechanism is used for providing a welding platform for a metal chain, and comprises a base corresponding to the chain feeding claw 225, and a chain guide groove die arranged on the base and used for limiting the metal chain. In order to enable the clamping welding device to be suitable for welding metal chains of various forms, the base comprises a circular first chassis fixed on the frame, a circular slideway arranged on the first chassis along the circumferential direction, a circular second chassis 300 slidably connected in the slideway, and a plurality of guide groove die mounting openings arranged on the second chassis 300 along the circumferential direction, wherein the first chassis and the second chassis 300 are all circular, so that when the metal chains walk on the metal chains, the metal chains can be better attached to a welding platform under the action of gravity. The first chassis and the second chassis 300 are fixedly connected through pins, the pins are loosened, the second chassis 300 can rotate on the first chassis, when metal chains in different forms are required to be welded, a required chain guide groove die can be arranged on the mounting port of other guide groove dies, and the second chassis 300 is rotated to enable the die to rotate to the corresponding position of the welding mechanism, and then the second chassis 300 is fixedly connected with the first chassis through the pins.

The chain guide groove die comprises a welding work platform 307 fixed at the mounting opening of the second chassis upper guide groove die, a guide plate component arranged on the welding work platform 307 and a movable template component arranged on the welding work platform. Referring to fig. 5, the guide plate assembly includes a first guide plate seat 301 clamped on one side of the second chassis, a second guide plate seat 302 clamped on the other side opposite to the second chassis, a first guide plate 303 fixed on the first guide plate seat 301, and a second guide plate 304 fixed on the second guide plate seat 302. The first guide plate seat 301 and the second guide plate seat 302 are respectively provided with a threaded hole which penetrates through, and an inverse thread screw 305 sequentially penetrates through the threaded hole on the first guide plate seat 301, the through hole on the second chassis and the threaded hole on the second guide plate seat 302 to connect the three, the inverse thread screw is screwed in one direction, the first guide plate seat 301 and the second guide plate seat 302 do mutual approaching movement, the inverse thread screw 305 is screwed reversely, and the first guide plate seat 301 and the second guide plate seat 302 do mutual separating movement. The first guide plate 303 and the first guide plate seat 301 and the second guide plate 304 and the second guide plate seat 302 are fixedly connected through fasteners such as pins, the first guide plate 303 and the second guide plate 304 after being installed are arranged on a welding workbench in an splayed mode, a guide groove 306 for a metal chain to pass through is formed at intervals between the first guide plate 303 and the second guide plate seat 304, the guide groove 306 gradually decreases along with approaching to a movable template assembly, and in addition, the width of the guide groove 306 can be adjusted through screwing the anti-tooth screw 305 so as to adapt to the metal chains with different sizes. The movable platen assembly includes a platen base 308 disposed on the soldering work platform 307 and located downstream of the guide plate assembly, and a first movable platen 309 and a second movable platen 310 movably disposed on the platen base 308. The template seat 308 is connected with the first movable template 309 and the template seat 308 is connected with the second movable template 310 through fastening screws 311, and the first movable template 309 and the second movable template 310 after being installed are arranged on the template seat at intervals, and a chain guide groove 312 for limiting a metal chain is formed at intervals between the first movable template 309 and the second movable template 310. In order to conveniently adjust the width between the chain guide grooves 312 to adapt to the use of metal chains of various specifications, the first movable die plate 309 and the second movable die plate 310 are respectively provided with a strip-shaped adjusting hole 313, wherein one fastening screw passes through the adjusting hole on the first movable die plate 309 to be connected with the die plate seat 308, and the other fastening screw passes through the adjusting hole on the second movable die plate 310 to be connected with the die plate seat 308, so that the first movable die plate 309 and the second movable die plate 310 are respectively limited on the die plate seat 308, the first movable die plate 309 or the second movable die plate 310 are moved along the adjusting hole, namely, the distance between the first movable die plate 309 and the second movable die plate 310 can be adjusted by adjusting the position of the fastening screw 311 in the strip-shaped adjusting hole 313, and then the width of the chain guide groove 312 is adjusted according to the width of the metal chain. In order to facilitate the smooth introduction of the metal chain into the guide plate assembly, a guide plate is further arranged at the upstream of the guide plate assembly, one end of the guide plate, which is far away from the guide plate assembly, is arranged in a downward inclined manner, and one end of the guide plate, which is close to the guide plate assembly, is tangential to the second chassis, and the metal chain smoothly enters the guide groove 306 through the guide of the guide plate. In addition, an arc-shaped guiding groove is further arranged at the downstream of the movable template component, the arc-shaped guiding groove is arranged on the second chassis 300, and the connection structure of the arc-shaped guiding groove and the second chassis is identical to the connection structure of the guide plate component and the second chassis. The radian of the arc top guide groove is equal to that of the arc at the corresponding position of the second chassis 300, so that the welded metal split chains are conveniently attached to the arc guide groove and led out.

The chain clamping mechanism is used for clamping the metal chain in the chain guide groove and comprises a jacking device connected with the wheel shaft 101 of the driven synchronous pulley 100 and clamping devices which are rotatably arranged on two sides of the base and are pushed by the jacking device to rotate so as to compress the metal chain. The jacking device comprises a second cam 400 sleeved on the driven synchronous pulley shaft, and a second lever mechanism with one end selectively contacted and connected with the second cam 400. The second lever mechanism includes a second lever 401 rotatably disposed on the frame through a pin, a third roller assembly 415 disposed at one end of the second lever 401 and selectively contacting and connected with the second cam 400, and a push rod 402 disposed at the other end of the second lever 401, where the third roller assembly 415 is similar to the first roller assembly in structure, and the structure of the third roller assembly 415 is not described herein. The low-point working surface on the second cam 400 is not contacted with the third roller assembly 415 in the rotation process, the high-point working surface on the second cam presses the third roller assembly 415 downwards, and the third roller assembly 415 is pressed to drive the second lever 401 to rotate so as to drive the ejector rod 402 at the other end of the second lever 401 to move upwards to push the pressing device. To facilitate the resetting of the second lever 402, the second lever 402 may be connected to the frame through an elastic member such as a spring or an elastic sleeve, so that the second lever 402 is reset under the action of the elastic member such as the spring or the elastic sleeve when the cam 200 is separated from the roller assembly.

Referring to fig. 6, the pressing device includes a first swing arm 404 rotatably disposed at one side of the second chassis 300 through a first rotation shaft 403, a second swing arm 406 rotatably disposed at the opposite side of the second chassis 300 through a second rotation shaft 405, a first clamping knife 407 disposed at an end of the first swing arm 404 away from the ejector rod 402 for pressing a metal chain at one side of the chain guide groove 312, and a second clamping knife 408 disposed at an end of the second swing arm 406 away from the ejector rod 402 for pressing a metal chain at the opposite side of the chain guide groove 312. The first swing arm 404 and the second swing arm 406 are V-shaped structures and are arranged in opposite directions, a quadrilateral-like opening is formed between the first swing arm and the second swing arm after being mounted, and the base is arranged through the opening. In addition, a gap is formed between the end of the first swing arm 404 away from the first clamping knife 407 and the end of the second swing arm 406 away from the second clamping knife 408, and the ejector rod 402 is correspondingly arranged in the gap. In this embodiment, in order to facilitate the movement of the first swing arm 404 and the second swing arm 406 simultaneously, the end of the ejector rod 402 away from the second lever is configured as a tapered structure with a cross-sectional dimension gradually decreasing along with the approaching chain guide slot, the tapered end of the ejector rod is disposed in the nip, when the second lever 401 pushes the ejector rod 402 to move along the nip toward the approaching chain guide slot, the ejector rod 402 can simultaneously push the first swing arm 404 and the second swing arm 405 to rotate around their corresponding rotation axes, during the rotation, the end of the first swing arm 404 away from the ejector rod 402 and the end of the second swing arm 406 away from the ejector rod 402 simultaneously rotate in opposite directions near the chain guide slot 312 to drive the first clamp blade 407 and the second clamp blade 408 to rotate from two sides to press the metal chain in the chain guide slot 312, and when the ejector rod 402 moves downward from the nip between the first swing arm 404 and the second swing arm 406, the end of the first clamp blade 407 away from the first clamp blade 407 and the end of the second clamp blade 408 rotate toward each other, and correspondingly, the first clamp blade 407 and the second clamp blade 408 simultaneously rotate away from each other, so that the metal chain guide slot 312 is released. In order to make the movement of the first swing arm 404 and the second swing arm 406 pushed by the ejector rod 402 smoother, a sliding wheel 409 is rotatably arranged at one end of the first swing arm 404 far away from the first clamping cutter 407 and one end of the second swing arm 406 far away from the second clamping cutter 408, so that the ejector rod 402 can be conveniently pushed to move the first swing arm 404 and the second swing arm 406 when moving up and down, and hard friction between the ejector rod 402 and the first swing arm 404 and hard friction between the ejector rod 402 and the second swing arm 406 can be reduced. In order to enable the first swing arm 404 and the second swing arm 406 to be automatically reset, the end of the first swing arm 404 close to the ejector rod 402 and the end of the second swing arm 406 close to the ejector rod 402 are further connected through a third spring 410, so that when the ejector rod 402 moves downwards from the gap between the first swing arm 404 and the second swing arm 406, the first swing arm 404 and the second swing arm 406 are automatically reset under the tension of the third spring 410. In order to keep the contact relationship with the first swing arm 404 and the second swing arm 406 all the time when the push rod 402 moves upwards, the third spring 410 is set to be in a stretched state all the time, and under the action of the tension of the third spring 410, the sliding wheel 409 on the first swing arm 404 and the sliding wheel 409 on the second swing arm 406 are pulled to be close to each other, so that the push rod 402 can well push the first swing arm 404 and the second swing arm 406 when moving upwards. The first clamping blade 407 is fixed to the first swing arm 404 by a first clamping blade holder 411, and the second clamping blade 408 is fixed to the second swing arm 406 by a second clamping blade holder 412. In addition, in order to prevent the metal chain to be splice welded from being dislocated under the pushing of the chain feeding claw 225 after a period of production, the pressing device may be further connected to the push rod 203, in which case the push rod 203 pushes the pressing device to move so as to push the metal chain to advance to the next welding point. Specifically, a third guide rail is further disposed on the frame, the first rotation shaft 403 is rotatably disposed on the first rotation shaft seat 413, the second rotation shaft 405 is rotatably disposed on the second rotation shaft seat 414, the first rotation shaft seat 413 and the second rotation shaft seat 414 are both connected with a moving block, the moving block slides in the third guide rail, and when the chain feeding claw 225 feeds, the moving block is fixed in the third guide rail by a fastener such as a screw. The push rod 203 is further provided with a fixing rod extending in the direction of the moving block. When the metal chain is required to be pushed to advance by adopting the clamping device, the moving block and the fixed rod are fixedly connected through fasteners such as jackscrews, the fasteners such as screws on the moving block are loosened, and then the chain feeding claw 225 on the rotating shaft is removed. During operation, the ejector rod 402 pushes the first swing arm 404 and the second swing arm 406 to rotate so that the first clamping knife 407 and the second clamping knife 408 clamp the metal chain, and then drives the first eccentric wheel 200 to drive the push rod 203 to advance so as to drive the first swing arm 404 and the second swing arm 406 connected with the moving block to advance, and then the first clamping knife 407 connected with the first swing arm 404 and the second clamping knife 408 connected with the second swing arm 406 compress the metal chain to advance to the next welding point. When the metal chain is not required to be pushed to move by the pressing device, that is, the chain feeding claw 225 is used for feeding the chain, the moving block can be fixed on the third guide rail by a fastener such as a screw and the like, the connection between the fixed rod and the moving block is disconnected, and the chain feeding claw 225 is arranged on the rotating shaft 223.

The welding mechanism is used for welding the metal chain and comprises a support frame 500 fixed on the frame and a welding part which is arranged on the support frame 500 and corresponds to the metal chain in the chain guide groove. One end of the supporting frame 500 is rotatably provided on the frame through a pin shaft, and a welding part is fixed to the other end of the supporting frame 500. In order to prevent the support frame 500 from freely rotating under the action of gravity, two opposite sides of the support frame 500 are respectively connected with the frame through a plurality of fourth springs, so that the support frame 500 is limited at a proper position through the elastic acting force of the fourth springs. In order to realize multi-point welding, the welding mechanism further comprises a pushing device for pushing the supporting frame 500 to rotate, the pushing device has a structure similar to that of the pushing device, the pushing device comprises a second eccentric wheel 502, a second link mechanism 503 with one end hinged with the second eccentric wheel 502, a pushing rod hinged with the other end of the second link mechanism 503, and a third guide rail for guiding the pushing rod, the third guide rail is fixed on the frame, and the pushing rod is slidingly connected in the third guide rail. The second eccentric 502 may be connected to the wheel shaft 101 of the driven synchronous pulley 100 via a further transmission or may be connected to a separate motor. The wheel shaft 101 of the driven synchronous pulley 100 or other independent motors drive the second eccentric wheel to rotate, the second eccentric wheel 502 drives the pushing block to reciprocate on the third guide rail close to or far away from the support frame 500 through the second connecting rod mechanism 503, when the pushing rod moves to the limit position in the direction of the support frame 500, the pushing rod pushes the support frame 500 to rotate, thereby driving the welding part to weld other welding spots on the metal chain, and when the second eccentric wheel 502 drives the pushing rod to move far away from the support frame 500 through the second connecting rod mechanism 503, the support frame 500 resets under the action of the fourth spring. The welding part includes a laser welder 501 fixed to the supporting frame 500, and a welding head of the laser welder 501 is located directly above the chain guide slot 312.

When the metal chain clamping welding device of this embodiment is used, two metal chains to be welded are led in along the guide plate, the guide groove 306 and the chain guide groove 312, the driving motor rotates to drive the driven synchronous pulley 100 to rotate so as to drive the first cam 205 and the second cam 400 on the driven synchronous pulley to rotate, because the high-point working surfaces of the first cam 205 and the second cam are arranged in a staggered manner, when the high-point working surface of the second cam 400 presses the third roller assembly downwards, the low-point working surface of the first cam 205 is in contact connection with the first roller, and the ejector rod 402 at the other end of the second lever 401 moves upwards to push the first swing arm 404 and the second swing arm 406 to rotate, so that the first clamping cutter 407 and the second clamping cutter 408 are driven to rotate oppositely to press the metal chains in the chain guide groove 312, and at this time, the laser welder performs splice welding on the two metal chains. After welding, the second cam 400 is gradually separated from the third roller assembly in the process of continuing to rotate, the second lever 401 is reset, the ejector rod 402 moves downwards from the gap between the first swing arm 404 and the second swing arm 406, under the tension of the third spring 410, one end of the first swing arm 404, which is close to the ejector rod 402, and one end of the second swing arm 406, which is close to the ejector rod 402, rotate close to each other, and then the first clamping knife 407 and the second clamping knife 408 rotate away from each other, so that the metal chain in the chain guide groove 312 is loosened. In this process, the first eccentric wheel 200 drives the first link mechanism 201 to move so as to drive the push rod 203 to move close to the metal chain, when the chain feeding claw 225 on the push rod 203 moves to the position 306 of the guide groove, the high-point working surface of the first cam 205 contacts and connects with the first roller 214, the lifting arm moves upwards to drive the second roller 219 at the other end to push the first lever 219 upwards, the first lever 219 is forced to rotate, the adjusting screw 222 at the other end of the first lever 219 presses the chain feeding claw swing rod 206 downwards, the chain feeding claw swing rod 206 is pressed to drive the rotating shaft 223 to rotate so as to enable the chain feeding claw 225 to rotate downwards and press on the metal chain, and at the moment, the push rod 203 continues to advance so as to drive the chain feeding claw 225 to push the metal chain to advance to the next welding point. Then, as the first cam 205 continues to rotate, the first lever 219 is driven to move downwards, so that the adjusting screw 222 at the end of the first lever 219 is separated from the chain feeding claw swing rod 206, the chain feeding swing rod 206 is reset under the action of the tension spring 226 to drive the rotating shaft 223 to rotate in a reset manner, so that the chain feeding claw 225 releases the metal chain, and at this time, the push rod 203 is driven by the first eccentric wheel 200 to drive the chain feeding claw 225 to retract to the initial position.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the teachings of the present invention, and all such variations are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a metal pin chain presss from both sides and welds device which characterized in that includes actuating mechanism, chain guide mechanism, chain mechanism and welding mechanism send:

the metal chain to be splice welded is introduced into the chain guide groove, the driving mechanism rotates to drive the pushing device to move in the direction close to the metal chain, the pushing device pushes the clamping device, the clamping device is forced to rotate to press the metal chain in the chain guide groove, at the moment, the welding mechanism welds the metal chain in the chain guide groove, then the driving mechanism drives the pushing device to move away from the metal chain, the pressing device resets along with the pushing device to loosen the metal chain, then the driving mechanism drives the pushing device to push the chain feeding claw to move to the metal chain in the chain guide groove, the pressing device rotates under the driving of the driving mechanism to drive the chain feeding claw on the pushing device to rotate to press the metal chain, and the pushing device continues to move to push the chain feeding claw on the pressing device and the metal chain pressed by the chain feeding claw to advance to the next welding point.

2. The welding device of claim 1, wherein the pushing device comprises a first eccentric wheel connected with the driving mechanism, a first connecting rod mechanism with one end hinged with the first eccentric wheel, a first connecting block hinged with the other end of the first connecting rod mechanism, and a push rod fixedly connected with the first connecting block, and the pressing device is rotatably connected with the push rod.

3. The metal chain splice welding device of claim 2, wherein the pushing device further comprises at least two first guide rails arranged on the frame, the pushing rod is slidably arranged in the at least two first guide rails, and the at least two first guide rails are respectively arranged at two ends of the pushing rod.

4. The metal splice chain pinch welding device of claim 1, wherein the driving mechanism comprises at least one motor, the pushing device and the pressing device are connected with the same motor of the driving device, or the pushing device and the pressing device are respectively connected with different motors on the driving device.

5. The metal chain splicing welding device according to claim 1, wherein the pressing device comprises a first cam sleeved on an output shaft of the driving mechanism, a lifting mechanism with one end in contact with the first cam, a first lever mechanism with one end connected with the other end of the lifting mechanism, and a chain feeding claw swing rod corresponding to the other end of the first lever mechanism, one end of the chain feeding claw swing rod, which is far away from the first lever mechanism, is connected with the frame through a third elastic component, wherein the chain feeding claw swing rod is separated from the first lever mechanism, a rotating shaft is fixedly arranged on the chain feeding claw swing rod, the rotating shaft is rotatably arranged in the pushing device, the chain feeding claw is arranged on the rotating shaft, when one end of the first lever mechanism is pushed to rotate in one direction by the lifting mechanism, the other end of the first lever mechanism rotates to press the chain feeding claw swing rod in the opposite direction, and the chain feeding claw swing rod is forced to rotate to drive the rotating shaft and the chain feeding claw on the rotating shaft to rotate to press the metal chain.

6. The device according to claim 5, wherein the lifting mechanism comprises a second guide rail arranged on the frame along the radial direction of the first cam, a sliding block slidingly connected in the second guide rail, a connecting rod with one end connected with the sliding block, a lifting arm connected with the other end of the connecting rod, and a first roller assembly arranged on the lifting arm and far away from one end of the connecting rod, the first roller assembly is in contact connection with the wheel surface of the first cam, a second roller assembly is further arranged on the lifting arm and near one end of the connecting rod, and the first cam drives the lifting arm and the second roller assembly to do linear reciprocating motion along the second guide rail through the first roller assembly in the process of rotating the first cam.

7. The metal chain splice welding device of claim 6, wherein the lifting mechanism further comprises a limiting device, the limiting device comprises a first elastic component, one end of the first elastic component is connected with the connecting rod, the other end of the first elastic component is connected with the frame, wherein the first elastic component is arranged in a stretching state all the time in the process that the connecting rod reciprocates on the second guide rail, and therefore the first cam and the first roller assembly are always in contact connection under elastic acting force.

8. The apparatus of claim 6, wherein the first roller assembly comprises a first nut fixed to the one end of the first lever, a first screw threaded with the first nut, a first roller seat fixedly connected with the first screw, and a first roller rotatably disposed in the first roller seat, wherein a roller surface of the first roller is in contact with a roller surface of the first cam.

9. The metal chain splice welding device according to claim 5, wherein the first lever mechanism comprises a first lever rotatably arranged on the frame, a top block arranged at one end of the first lever and in contact connection with the lifting mechanism, a third nut arranged at the other end of the first lever, and an adjusting screw in threaded connection with the third nut, the adjusting screw extends towards the direction of the chain feed claw swing rod, when the low-point working surface of the first cam is in contact connection with the lifting mechanism, the adjusting screw is not in contact with the chain feed claw swing rod, when the high-point working surface of the first cam is in contact connection with the lifting mechanism, the lifting mechanism pushes the first lever, the adjusting screw arranged at the other end of the first lever presses the chain feed claw swing rod, and the chain feed claw swing rod is forced to rotate to drive the rotating shaft and the chain feed claw thereon to rotate.

10. The metal splice chain pinch welding device of claim 9, wherein the first lever and the lifting device are further connected by a second elastic member, one end of the second elastic member is connected with the first lever, the other end of the second elastic member is connected with the lifting mechanism, and the second elastic member is in a stretched state.

11. The metal chain splice welding device of claim 9, wherein a third roller for reducing hard friction is arranged at one end of the chain feed claw swing rod corresponding to the first lever, and the diameter of the third roller is larger than the width of the chain feed claw swing rod.

12. The metal splice chain clamp welding device according to claim 1, wherein the base comprises an annular first chassis fixed on the frame, an annular slideway arranged on the first chassis along the circumferential direction, and an annular second chassis slidingly connected in the slideway, the first chassis and the second chassis are fixedly connected through a pin, the pin is loosened, the second chassis can rotate on the first chassis, wherein a plurality of chain guide groove die mounting openings are arranged on the second chassis along the circumferential direction of the second chassis, and the chain guide groove die is arranged at the chain guide groove die mounting openings.

13. The metal splice chain pinch welding device of claim 12, wherein the chain guide slot die comprises a welding work platform fixed on a base, a guide plate assembly arranged on the welding work platform and used for guiding the metal chain, and a movable die plate assembly arranged on the welding work platform and used for limiting the metal chain, wherein the movable die plate assembly is positioned at the downstream of the guide plate assembly.

14. The device of claim 13, wherein the guide plate assembly comprises a first guide plate seat clamped on one side of the base, a second guide plate seat clamped on the opposite side of the base, a first guide plate fixed on the first guide plate seat, and a second guide plate fixed on the second guide plate seat, threaded holes are formed in the first guide plate seat and the second guide plate seat, a counter screw rod sequentially penetrates through the threaded holes in the first guide plate seat, the through hole in the second chassis and the threaded holes in the second guide plate seat to connect the three, the counter screw rod is screwed in one direction, the first guide plate seat and the second guide plate seat move close to each other, the counter screw rod is reversely screwed, and the first guide plate seat and the second guide plate seat move away from each other.

15. The apparatus of claim 14, wherein the first guide plate and the second guide plate are arranged in a splayed configuration, and a distance between the first guide plate and the second guide plate forms a guide groove for the metal chain to pass through, and the width of the guide groove gradually decreases as the guide groove approaches the movable die plate assembly.

16. The apparatus of claim 13, wherein the movable die plate assembly comprises a die plate seat disposed on the welding platform and downstream of the guide plate assembly, a first movable die plate and a second movable die plate movably disposed on the die plate seat, wherein the first movable die plate and the second movable die plate are disposed on the die plate seat at intervals, and a spacing therebetween forms a chain guide slot for limiting the metal chain.

17. The device for welding the metal chain splice according to claim 16, wherein the die plate seat is connected with the first movable die plate and the die plate seat is connected with the second movable die plate through fastening screws, elongated adjusting holes are formed in the first movable die plate and the second movable die plate, the fastening screws penetrate through the adjusting holes to connect the first movable die plate with the die plate seat and connect the second movable die plate with the die plate seat, and the first movable die plate or the second movable die plate can be moved along the length direction of the adjusting holes, so that the distance between the first movable die plate and the second movable die plate can be adjusted, and the width of the chain guide groove can be adjusted.

18. The metal splice chain clamping welding device according to claim 13, wherein a guide plate is further arranged at the upstream of the guide plate assembly, one end of the guide plate, which is far away from the guide plate assembly, is arranged in a downward inclined mode, one end of the guide plate, which is close to the guide plate assembly, is tangential to the base, an arc-shaped guiding groove for guiding out a welded metal chain is further arranged at the downstream of the movable die plate assembly, and the arc-shaped guiding groove is fixed on the base.

19. The welding device of claim 1, wherein the pushing device comprises a second cam sleeved on the output shaft of the driving mechanism and a second lever mechanism with one end selectively contacted and connected with the second cam, the low-point working surface of the second cam is not contacted with one end of the second lever mechanism in the rotation process of the second cam, and when the high-point working surface of the second cam gradually rotates to be contacted and connected with one end of the second lever mechanism, the second cam presses one end of the second lever mechanism in a direction far away from the metal chain, and the other end of the second lever mechanism moves close to the metal chain to push the pressing device to rotate and press the metal chain in the chain guide groove.

20. The welding device of claim 19, wherein the second lever mechanism comprises a second lever rotatably arranged on the frame, a third roller assembly arranged at one end of the second lever and selectively contacted with the second cam, and a push rod arranged at the other end of the second lever, wherein a low-point working surface of the second cam is not contacted with the third roller assembly in the rotation process, a high-point working surface of the second cam presses the third roller assembly, and the third roller assembly is pressed to drive the second lever to rotate so as to drive the push rod at the other end of the second lever to move close to the metal chain, and the pushing device compresses the metal chain in the chain guide groove.

21. The metal splice chain pinch welding device of claim 20, wherein an end of the carrier rod facing the hold-down device is tapered with a cross-sectional dimension that gradually decreases as the carrier rod approaches the hold-down device.

22. The metal chain splice welding device according to claim 1, wherein the pressing device comprises a first swing arm rotatably arranged on one side of the base, a second swing arm rotatably arranged on the opposite side of the base, a first clamping knife arranged on one end of the first swing arm far away from the jacking device and used for pressing a metal chain on one side of the chain guide groove, and a second clamping knife arranged on one end of the second swing arm far away from the jacking device and used for pressing a metal chain on the other side of the chain guide groove, wherein the first swing arm and the second swing arm are of V-shaped structures and are oppositely and symmetrically arranged, the chain guide groove is positioned in a space between the first swing arm and the second swing arm, a crack is formed between an end part, close to the jacking device, of the first swing arm and an end part, close to the jacking device, of the second swing arm, and when the jacking device pushes the first swing arm and the second swing arm upwards from the crack, a first clamping knife positioned at the other end of the first swing arm and a second clamping knife positioned at the other end of the second swing arm are pushed to simultaneously rotate oppositely so as to press the metal chain in the chain guide groove from two sides.

23. The metal splice chain pinch welding device of claim 22, wherein a sliding wheel is rotatably disposed at both an end of the first swing arm proximate the pusher and an end of the second swing arm proximate the pusher.

24. The metal chain splice welding device of claim 22, wherein the end of the first swing arm adjacent to the pusher and the end of the second swing arm adjacent to the pusher are further connected by a third elastic member, and when the pusher pushes the first swing arm and the second swing arm, the third elastic member is in a stretched state so that the pusher moves in the nip toward the direction adjacent to the metal chain, the pusher is always in contact connection with the ends of the first swing arm and the second swing arm.

25. The metal splice chain pinch welding device of claim 22, wherein a third guide rail is further provided on the frame, the pressing device is slidably connected in the third guide rail through a moving block, the pressing device is further selectively connected with the pushing device, the fixing rod extending toward the pressing device is further provided on the pushing device, when the pushing device is required to be connected with the pressing device, the fixing rod is connected with the moving block through a fastening piece, when the pressing device is not connected with the pushing device, the connection between the fixing rod and the moving block is disconnected, and the moving card is fixed in the third guide rail.

26. The apparatus according to claim 1, wherein the welding mechanism comprises a supporting frame provided on the frame and a welding portion fixed to the supporting frame and provided corresponding to the metal chain in the chain guide groove.

27. The apparatus according to claim 26, wherein one end of the supporting frame is rotatably provided to the frame through a pin, and the welding portion is fixed to the other end of the supporting frame.

29. The device of claim 27 or 28, wherein opposite sides of the support frame are respectively connected to the frame by a fourth elastic member, the fourth elastic member being configured to limit free rotation of the support frame and assist in repositioning the support frame.

30. The welding device of claim 28, wherein the pushing device comprises a second eccentric wheel connected with the driving mechanism, a second link mechanism with one end hinged with the second eccentric wheel, and a pushing rod hinged with the other end of the second link mechanism, a third guide rail is further arranged on the frame, the pushing rod is slidably arranged in the third guide rail, the pushing rod is driven to reciprocate in the third guide rail by the second link mechanism in the process of rotating the second eccentric wheel, and when the pushing rod moves to a limit position in the direction of the supporting frame, the pushing rod pushes the supporting frame to rotate, so that the welding device on the pushing rod is driven to weld other welding spots on the metal chain.