CN113510424A

CN113510424A - Assembly workbench for assembling chain wheel and main shaft and assembly method thereof

Info

Publication number: CN113510424A
Application number: CN202110734852.3A
Authority: CN
Inventors: 王灼建; 虞继明; 董波
Original assignee: Ningbo Hongda Elevator Co Ltd
Current assignee: Ningbo Hongda Elevator Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-10-19
Anticipated expiration: 2041-06-30
Also published as: CN113510424B

Abstract

The invention provides an assembling workbench and an assembling method thereof for assembling a chain wheel and a main shaft, and belongs to the technical field of assembling equipment of the chain wheel and the main shaft. The assembling device solves the problems that the assembling precision cannot be improved and the welding efficiency cannot be improved in the existing assembling device. The invention relates to an assembling workbench for assembling a chain wheel and a main shaft, which comprises a base, a fixed shell, a left positioning assembly, a left clamping shaft assembly, a sliding frame, a right clamping shaft assembly, a right positioning assembly and a positioning mechanism. According to the invention, one chain wheel is positioned and placed on the left positioning component, the other chain wheel is positioned and placed on the right positioning component, the positioning mechanism supports the two chain wheels, and the main shaft is placed on the movable frame, so that the central axis of the main shaft is coincident with the central axes of the two chain wheels, and the main shaft and the chain wheels can be accurately assembled together.

Description

Assembly workbench for assembling chain wheel and main shaft and assembly method thereof

Technical Field

The invention belongs to the technical field of assembling equipment of a chain wheel and a main shaft, and relates to an assembling workbench and an assembling method for assembling the chain wheel and the main shaft.

Background

An escalator or an escalator for moving pedestrians, a handrail elevator and an escalator are transportation tools for transporting pedestrians in a transportation belt mode. The escalator is generally inclined, so that the steps automatically walking by the pedestrians at one end station of the escalator can be automatically taken to the other end of the escalator, and the steps can be kept horizontal all the way. Handrails which move synchronously with the steps are arranged at two sides of the escalator and are held by users.

The chain wheel is an important component in the escalator, and in the process of chain wheel installation, the chain wheel and the main shaft need to be installed and welded, and manual installation and manual welding are often adopted in the process, so that a plurality of workers are required to operate together, the assembling cost of the main shaft and the chain wheel is increased, the installation efficiency is low, and the accuracy of the chain wheel and the main shaft which are assembled manually cannot be guaranteed.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides an assembling workbench and an assembling method thereof for assembling a chain wheel and a main shaft, which can improve assembling accuracy and welding efficiency.

The purpose of the invention can be realized by the following technical scheme: an assembly station for assembling a sprocket with a spindle, comprising:

the device comprises a base, wherein a fixed shell is arranged on one side of the base;

the left positioning assembly is rotatably arranged in the fixed shell, a left clamping shaft assembly is movably clamped in the left positioning assembly, and a driving mechanism for driving the left positioning assembly to rotate is arranged in the fixed shell;

the sliding frame is slidably arranged on the base, and a right clamping shaft assembly is movably arranged on the sliding frame;

and the right positioning assembly is movably sleeved on the right clamping shaft assembly, and a positioning mechanism for supporting the chain wheel is arranged on the base.

In foretell be used for assembling the equipment workstation of sprocket and main shaft, left side locating component is including changeing the cover, change and install the master gear of being connected with actuating mechanism on the cover, change and sheathe in the activity cover and be equipped with two at least snap rings of being connected with the set casing, be equipped with the outer bearing between snap ring and the commentaries on classics cover.

In foretell equipment workstation that is used for assembling sprocket and main shaft, the one end card of commentaries on classics cover is equipped with the card shell, left side card axle subassembly includes the outer sleeve and the card axle spare that can change the cover relatively and remove, card axle spare activity card is located in the card shell, be connected through the push rod between outer sleeve and the card axle spare.

In the above assembling workbench for assembling the chain wheel and the main shaft, the carriage is provided with a right cylinder body for driving the right clamping shaft assembly to move, and the right cylinder body is provided with a right cylinder rod for installing the right clamping shaft assembly and the right positioning assembly.

In foretell be used for assembling the equipment workstation of sprocket and main shaft, right side card axle subassembly includes that the movable sleeve locates the cutting ferrule on the right cylinder pole, can dismantle on the right cylinder pole and be connected with the anticreep cover that prevents the cutting ferrule dislocation removal, install left bearing between cutting ferrule and the right cylinder pole.

In foretell be used for assembling the equipment workstation of sprocket and main shaft, right locating component is including the fixed cover of cover establishing on right cylinder pole, fixed cover and right cylinder pole can dismantle with the connection, right cylinder pole can remove fixed cover relatively.

In foretell be used for assembling the equipment workstation of sprocket and main shaft, the movable sleeve is equipped with right position sleeve on the fixed cover, be equipped with a plurality of right lugs on the right position sleeve, be equipped with right bearing between right position sleeve and the fixed cover.

In foretell be used for assembling sprocket and main shaft's equipment workstation, positioning mechanism includes the lift seat and is used for driving the lift subassembly that the lift seat goes up and down, one side of lift seat is equipped with the plug bush, the plug bush interpolation is equipped with the depression bar, be equipped with two at least braking components in the balladeur train, each braking component is connected through same connecting rod, the depression bar is located the top of connecting rod.

In foretell assembly workbench for assembling sprocket and main shaft, actuating mechanism includes first pivot, second pivot and the third pivot of movable mounting in the set casing, second gear and third gear are installed to first pivot, install fourth gear and fifth gear in the second pivot, fourth gear and third gear meshing, install the sixth gear with master gear meshing in the third pivot, sixth gear and fifth gear meshing.

An assembly method of an assembly table for assembling a sprocket with a spindle, comprising:

step S1, one chain wheel is positioned and placed on the left positioning component, the other chain wheel is positioned and placed on the right positioning component, the positioning mechanism supports the two chain wheels, and then the main shaft is placed on the moving frame;

step S2, the sliding frame is pushed towards the direction of the fixed shell until two ends of the main shaft respectively pass through the chain wheels, meanwhile, one end of the left clamping shaft assembly is inserted into the main shaft, and one end of the right clamping shaft assembly is inserted into the main shaft;

step S3, separating a positioning rod on the positioning mechanism from the chain wheel, braking the sliding frame on the guide rail by the braking assembly, and then separating a pressure rod on the positioning mechanism from the braking assembly;

step S3, unfolding a shaft clamping piece of the left shaft clamping assembly to clamp the shaft clamping piece in the main shaft, and driving the left positioning assembly and the left shaft clamping assembly to synchronously rotate by the driving mechanism to synchronously rotate the main shaft and the chain wheel;

step S4, welding the inner side connecting part between the main shaft and the chain wheel by a welding gun;

step S5, after welding, the brake assembly is released, and the driving mechanism stops running;

step S6, moving the carriage away from the fixed seat, and simultaneously, controlling the left clamping shaft assembly to push the carriage towards the left positioning assembly and controlling the right clamping shaft assembly to move towards the fixed shell towards the right positioning assembly;

step S7, when the left positioning component and the right positioning component are respectively separated from the corresponding chain wheel, the sliding frame stops moving, and the sliding frame is braked on the guide rail by the braking component;

step S8, the driving mechanism drives the left positioning component and the left clamping shaft component to synchronously rotate so as to enable the main shaft and the chain wheel to synchronously rotate;

step S9, welding the outer side connecting part between the main shaft and the chain wheel by a welding gun;

and step S10, when the welding is finished, the driving mechanism stops running, the left clamping shaft assembly resets, and the right clamping shaft assembly resets.

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

1. according to the invention, one chain wheel is positioned and placed on the left positioning component, the other chain wheel is positioned and placed on the right positioning component, the positioning mechanism supports the two chain wheels, and the main shaft is placed on the movable frame, so that the central axis of the main shaft is coincident with the central axes of the two chain wheels, and the main shaft and the chain wheels can be accurately assembled together.

2. Through the use of this equipment workstation for people can weld the inside and outside junction of sprocket smoothly, thereby guarantee the stability of being connected between sprocket and the main shaft.

3. Through the use of this equipment workstation, realize main shaft and sprocket synchronous rotation, afterwards, people only need hold welder or control the manipulator and press from both sides tight welder to aim at inboard junction and outside junction with this welder, alright weld inboard junction and outside junction, so, effectively improve welding efficiency between main shaft and the sprocket, reduce manual operation's the degree of difficulty.

4. When the left clamping shaft assembly and the right clamping shaft assembly are inserted into the main shaft respectively, the positioning mechanism does not need to provide supporting force for the chain wheel, so that people can control the lifting assembly to drive the lifting seat to move downwards until the positioning rod is separated from the chain wheel, the positioning mechanism can be used as a power source for driving the brake assembly to lock the guide rail, and therefore people do not need to apply downward pressure to the brake assembly, and operation of people is facilitated.

5. By the assembling method, not only can the accurate installation between the chain wheel and the main shaft be ensured, but also the inner and outer connecting parts of the chain wheel can be smoothly welded, and meanwhile, the operation difficulty of people can be effectively reduced by the method.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a cross-sectional view at a-a of fig. 2.

FIG. 4 is a schematic view of the left positioning assembly and the left chuck assembly after being assembled.

Fig. 5 is a schematic structural diagram of a limiting block.

FIG. 6 is a schematic view of the right positioning assembly and the right chuck assembly in half section after assembly.

Fig. 7 is a schematic structural view of the brake assembly.

Fig. 8 is an enlarged schematic view of B in fig. 3.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 8, an assembly table for assembling a sprocket and a main shaft according to the present invention includes a base 100, a fixed housing 200, a left positioning assembly 300, a left shaft-clamping assembly 400, a carriage 110, a right shaft-clamping assembly 600, a right positioning assembly 500, and a positioning mechanism 700.

In the present invention, the sprocket adjacent to the right chuck shaft assembly 600 is referred to as a right sprocket, and the sprocket adjacent to the left chuck shaft assembly 400 is referred to as a left sprocket.

In the invention, the inner side connection point refers to a connection point which is located between the chain wheel and the main shaft and between the two chain wheels, and the outer side connection point refers to a connection point which is located between the chain wheel and the main shaft and is not located between the two chain wheels.

One side of the base 100 is provided with a fixed shell 200, the left positioning component 300 is rotatably installed in the fixed shell 200, the left positioning component 300 is movably clamped with a left clamping shaft component 400, the fixed shell 200 is internally provided with a driving mechanism 800 for driving the left positioning component 300 to rotate, the sliding frame 110 is slidably installed on the base 100, the sliding frame 110 is movably installed with a right clamping shaft component 600, the right positioning component 500 is movably sleeved on the right clamping shaft component 600, the base 100 is provided with a positioning mechanism 700 for supporting a chain wheel, the sliding frame 110 is internally provided with at least two braking components 120, the base 100 is provided with at least two guide rails 140 for guiding the movable sliding frame 110, the guide rails 140 are connected with a movable frame 150 for supporting a main shaft in a rolling manner, the braking components 120 are positioned right above the guide rails 140, in the process of assembling the chain wheel and the main shaft together, a chain wheel needs to be positioned on the left positioning component 300 firstly, positioning another sprocket on the right positioning assembly 500, allowing the positioning mechanism 700 to support the two sprockets, disposing the main shaft on the moving frame 150, pushing the sliding frame 110 toward the fixed housing 200 until the two ends of the main shaft respectively pass through the sprockets, simultaneously inserting one end of the left clamping shaft assembly 400 into the main shaft and one end of the right clamping shaft assembly 600 into the main shaft, separating the positioning mechanism 700 from the sprockets, i.e., pressing the braking assembly 120 downward by the positioning mechanism 700, so that the braking assembly 120 brakes the sliding frame 110 on the guide rail 140, thereafter, returning the positioning mechanism 700 to the initial position, thereafter, expanding one end of the left clamping shaft assembly 400 inserted into the main shaft, so that one end of the left clamping shaft assembly 400 inserted into the main shaft is clamped in the main shaft, and thereafter, the driving mechanism 800 drives the left positioning assembly 300 and the left clamping shaft assembly 400 to synchronously rotate so that the main shaft and the sprockets synchronously rotate, thus, a user only needs to hold the welding gun to weld the inner joint, after the welding is completed, the brake assembly 120 is released from braking, the driving mechanism 800 stops operating, then the carriage 110 moves away from the fixed seat, at the same time, the left clamping shaft assembly 400 is controlled to push the carriage 110 direction relative to the left positioning assembly 300, the left clamping shaft assembly 400 is controlled to move towards the fixed shell 200 direction relative to the left positioning assembly 300, so that the left positioning assembly 300 and the right positioning assembly 500 are separated from the corresponding chain wheels respectively, when the left positioning assembly 300 and the right positioning assembly 500 are separated from the corresponding chain wheels respectively, the carriage 110 stops moving, the braking assembly 120 brakes the carriage 110 on the guide rail 140, the driving mechanism 800 drives the left positioning assembly 300 and the left clamping shaft assembly 400 to synchronously rotate, so that the main shaft and the chain wheels synchronously rotate, and then the welding gun welds the outer joint, after the joints of the chain wheel and the main shaft are welded, namely the main shaft and the chain wheel form a whole, the driving mechanism 800 stops running, the left clamping shaft assembly 400 resets, the right clamping shaft assembly 600 resets, and the stability of the main shaft and the chain wheel in the welding process is effectively improved through the use of the assembling workbench; and main shaft and sprocket are at the welded in-process, and removal frame 150 supports the main shaft all the time for when left calorie of axle subassembly 400 and main shaft separation and right calorie of axle subassembly 600 and main shaft separation, this main shaft also can not drop from removal frame 150, so, makes things convenient for people to remove the main shaft after the welding.

Furthermore, when the main shaft and the chain wheel rotate synchronously, the welding gun can be clamped by the mechanical arm and aligned to the inner side joint and the outer side joint, and the inner side joint and the outer side joint can be welded, so that the welding efficiency between the main shaft and the chain wheel is effectively improved.

As shown in fig. 1 to 5, the left positioning assembly 300 includes a rotary sleeve 310, a main gear 311 connected to the driving mechanism 800 is installed on the rotary sleeve 310, a left positioning sleeve 320 for installing a chain wheel is sleeved on one end of the rotary sleeve 310, a plurality of left protrusions 321 are disposed on the left positioning sleeve 320, when the chain wheel is installed in a positioning manner, one needs to place the chain wheel on the left positioning sleeve 320 and make the left protrusions 321 penetrate through the chain wheel, the bottom of the chain wheel is positioned on two positioning rods 713, so as to realize the positioning and installation of the chain wheel on the assembly workbench, when the left chain wheel is to be welded, the positioning mechanism 700 needs to be separated from the left chain wheel, so that when the driving mechanism 800 drives the main gear 311 to rotate synchronously with the rotary sleeve 310, the rotary sleeve 310 can drive the left positioning sleeve 320 and the left chain wheel to rotate synchronously, because the left shaft clamping assembly 400 is clamped in the left positioning assembly 300 at this time, so that the left positioning assembly 300 can drive the left shaft clamping assembly 400 to rotate synchronously with the main shaft assembly 400, secondly, the rotating sleeve 310 is movably sleeved with at least two snap rings 312 connected with the fixed shell 200, and an outer bearing 313 is arranged between the snap rings 312 and the rotating sleeve 310, so that the rotating sleeve 310 can rotate circumferentially relative to the fixed shell 200.

A clamping shell 410 is clamped at one end of the rotary sleeve 310, the left clamping shaft assembly 400 comprises an outer sleeve 420 and a clamping shaft member 430 which can move relative to the rotary sleeve 310, the clamping shaft member 430 is movably clamped in the clamping shell 410, the outer sleeve 420 is connected with the clamping shaft member 430 through a push rod 440, a left cylinder body 450 for pushing the outer sleeve 420 to move relative to the rotary sleeve 310 is arranged on the fixed shell 200, the rotary sleeve 310 is provided with a left limit plate 330, the push rod 440 penetrates through the left limit plate 330, a spring 340 is arranged between the outer sleeve 420 and the left limit plate 330, a right limit plate 350 is arranged inside the rotary sleeve 310 and between the left limit plate 330 and the clamping shell 410, a limit block 441 is sleeved on the push rod 440, a plurality of left limit strips 331 are arranged on the left limit plate 330, a plurality of right limit strips 351 are arranged on the right limit plate 350, a left limit hole 441a corresponding to the left limit strip 331 is arranged on the limit block 441, a right limit hole 441 corresponding to the right limit strip 351 is arranged on the block 441, the length of the left limit bar 331 is far greater than that of the left limit hole 441a, the left cylinder body 450 is provided with a left cylinder rod 451, an inner sleeve 421 is movably installed in the outer sleeve 420, one end of the left cylinder rod 451 is clamped in the inner sleeve 421, a block 422 for preventing the left cylinder rod 451 from being separated is arranged in the inner sleeve 421, an inner bearing 423 is arranged between the outer sleeve 420 and the inner sleeve 421, when the left cylinder body 450 pushes out the left cylinder rod 451, the outer sleeve 420 moves along with the outer sleeve, because one end of the push rod 440 is connected with the outer sleeve 420, the other end of the push rod 440 is connected with the shaft clamping member 430, and the clamping shell 410 props against the inside of the main shaft at the moment, so that the shaft clamping member 430 is unfolded and penetrates through the clamping shell 410, the spring 340 is stressed and compressed, when the shaft clamping member 430 presses the inner wall of the main shaft, the left cylinder body 450 stops working, so that the left shaft clamping assembly 400 is connected with the main shaft through the shaft clamping member 430, and in the process, the left limit bar 331 always penetrates through the left limit hole 441a, the left limiting plate 330 is fixedly connected with the rotating sleeve 310, so that when the rotating sleeve 310 rotates, the left limiting plate 330 drives the limiting block 441, the push rod 440, the outer sleeve 420, the clamping shell 410, the main shaft and the clamping shaft piece 430 to synchronously rotate, and thus, the left positioning assembly 300, the left clamping shaft assembly 400, the main shaft and the left chain wheel can synchronously rotate, and people can conveniently weld the inner side joint of the left chain wheel; when welding the outer side joint of the left sprocket, one needs to move the carriage 110, the left cylinder body 450 is operated to push the left cylinder rod 451 out continuously until the left limiting hole 441a is separated from the left limiting strip 331 and the right limiting strip 351 on the right limiting plate 350 passes through the right limiting hole 441b, after that, the left cylinder body 450 stops working, in the process, the main shaft moves away from the left positioning component 300, so that when the push rod 440 pushes the clamping shell 410 to move away from the rotating sleeve 310, the clamping shaft 430 is always clamped in the main shaft, and thus, when the rotary sleeve 310 rotates, the right limiting plate 350 drives the limiting block 441, the push rod 440, the outer sleeve 420, the clamping shell 410, the main shaft and the clamping shaft 430 to rotate synchronously, therefore, the left positioning component 300, the left clamping shaft component 400, the main shaft and the left chain wheel can synchronously rotate, and people can conveniently weld the outer side connecting part of the left chain wheel; after the welding operation is finished, the left cylinder body 450 retracts the left cylinder rod 451, and the outer sleeve 420, the push rod 440 and the clamping shell 410 move synchronously because the outer sleeve 420 and the inner sleeve 421 are connected through the inner bearing 423, in the process, the clamping shaft 430 retracts into the clamping shell 410 again, when the clamping shell 410 clamps the rotating sleeve 310 again and the left cylinder rod 451 continues to retract, the clamping shaft 430 retracts into the clamping shell 410 completely, in addition, when the left clamping shaft assembly 400 performs the reset movement, one end of the spring 340 abuts against the outer sleeve 420, the other end of the spring 340 abuts against the left limiting plate 330, and the left limiting plate 330 is fixedly connected with the rotating sleeve 310, so that the spring 340 has a certain pushing force on the outer sleeve 420, and the left clamping shaft assembly 400 can be further ensured to reset.

Further, when the outer sleeve 420 rotates, the inner sleeve 421 is movably connected to the outer sleeve 420 through the inner bearing 423, and one end of the left cylinder rod 451 is clamped in the inner sleeve 421, so that the inner sleeve 421 and the left cylinder rod 451 are not affected during the rotation of the outer sleeve 420, thereby ensuring the normal operation of the left clamping shaft assembly 400.

The shaft clamping member 430 includes a claw block 431 movably penetrating through the clamping housing 410, a plurality of claws 432 are hinged on the claw block, the claws 432 movably penetrate through the side surface of the clamping housing 410, when the clamping housing 410 abuts against the inner wall of the spindle and the claw block 431 is continuously inserted into the clamping housing 410, because one end of the claw 432 is hinged with the claw block 431, the other end of the claw 432 is penetrated through the side surface of the clamping housing 410, so that the claw 432 extends out of the clamping housing 410, and further the claw 432 presses the inner wall of the spindle, that is, the shaft clamping member 430 is clamped on the inner wall of the spindle.

As shown in fig. 1 to 3 and 6, the carriage 110 is provided with a right cylinder 111 for driving the right clamping shaft assembly 600 to move, the right cylinder 111 is provided with a right cylinder 111a for mounting the right clamping shaft assembly 600 and the right positioning assembly 500, the right clamping shaft assembly 600 includes a clamping sleeve 610 movably sleeved on the right cylinder 111a, the right cylinder 111a is detachably connected with an anti-falling sleeve 620 for preventing the clamping sleeve 610 from moving in a dislocation manner, a left bearing 630 is mounted between the clamping sleeve 610 and the right cylinder 111a, the right positioning assembly 500 includes a fixing sleeve 510 sleeved on the right cylinder 111a, the fixing sleeve 510 is detachably connected with the right cylinder 111a, the right cylinder 111a can move relative to the fixing sleeve 510, the fixing sleeve 510 is movably sleeved with a right positioning sleeve 520, the right positioning sleeve 520 is provided with a plurality of right protrusions 521, and a right bearing 530 is disposed between the right positioning sleeve 520 and the fixing sleeve 510.

When welding the inner side joint of the right sprocket, one needs to first place the sprocket on the positioning mechanism 700, place the main shaft on the movable frame 150, and pass the right protrusion 521 through the sprocket, when one moves the carriage 110, one end of the main shaft is inserted into the sprocket and has a certain friction with the sprocket, at the same time, the cutting ferrule 610 is inserted into the main shaft, and a certain friction is provided between the cutting ferrule 610 and the main shaft, so that when the main shaft rotates, the main shaft can drive the sprocket to rotate synchronously, specifically, because the sprocket is installed on the right positioning sleeve 520 through the right protrusion 521, and the right positioning sleeve 520 is movably installed on the fixing sleeve 510 through the right bearing 530, so that the right positioning sleeve 520 and the sprocket can rotate synchronously relative to the fixing sleeve 510, and the cutting ferrule 610 is inserted into the main shaft, the cutting ferrule 610 is movably installed on the right cylinder rod 111a through the left bearing 630, so that the main shaft and the 610 can rotate synchronously relative to the right cylinder rod 111a, and the one end of main shaft inserts in this sprocket to realize that the main shaft drives this sprocket synchronous revolution, secondly, through foretell structure, realized the accurate positioning of sprocket, also can realize the accurate installation between sprocket and the main shaft, afterwards, people only need aim at the inboard junction of right sprocket with welder, just can carry out stable welding with the inboard junction of right sprocket.

When the outer side joint of the right sprocket is to be welded, one needs to move the carriage 110 away from the stationary case 200, meanwhile, the right cylinder 111 pushes out the right cylinder rod 111a, and as the cutting sleeve 610 is movably mounted on the right cylinder rod 111a through the left bearing 630, the cutting sleeve 610 is driven by the right cylinder rod 111a to move, thereby ensuring that the cutting sleeve 610 is always inserted in the main shaft in the moving process of the sliding rack 110, when the right protrusion 521 is separated from the right sprocket and a certain distance is reached between the right positioning sleeve 520 and the right sprocket, the movement of the carriage 110 and the operation of the right cylinder 111 are stopped, and thereafter, the main shaft is rotated, therefore, the welding of the inner side joint of the right chain wheel is completed, so that the right chain wheel can synchronously rotate along with the main shaft, and after that, people only need align the welding gun to the outer side joint of the right chain wheel, and then the outer side joint of the right chain wheel can be stably welded.

Through above-mentioned welding process, alright weld the inside and outside junction of right sprocket to make main shaft and sprocket can be stably connected, simultaneously, also make things convenient for people to operate.

As shown in fig. 1-3 and 7-8, the positioning mechanism 700 includes a lifting seat 710 and a lifting assembly 720 for driving the lifting seat 710 to lift, an insertion sleeve 711 is disposed on one side of the lifting seat 710, a pressing rod 712 is inserted into the insertion sleeve 711, each braking assembly 120 is connected by a same connecting rod 130, the pressing rod 712 is disposed above the connecting rod 130, at least two positioning rods 713 are disposed on the lifting seat 710, when a sprocket is placed, a person needs to manipulate the lifting assembly 720 to drive the lifting seat 710 to ascend to a predetermined position, then place the sprocket on the two positioning rods 713, insert the left protrusion 321 into the left sprocket and insert the right protrusion 521 into the right sprocket, so as to achieve accurate positioning of the sprocket; when the left shaft-clamping assembly 400 and the right shaft-clamping assembly 600 are respectively inserted into the main shaft, the positioning mechanism 700 does not need to provide a supporting force for the chain wheel, so that a user can control the lifting assembly 720 to drive the lifting seat 710 to move downwards until the positioning rod 713 is separated from the chain wheel, and the positioning mechanism 700 can be used as a power source for driving the brake assembly 120 to lock the guide rail 140, specifically, because the pressing rod 712 is positioned above the connecting rod 130, the pressing rod 712 is inserted into the inserting sleeve 711, the inserting sleeve 711 is connected with the lifting seat 710, and the two brake assemblies 120 are connected through the connecting rod 130, so that in the process that the lifting seat 710 drives the inserting sleeve 711 and the pressing rod 712 to move downwards, the pressing rod 712 can press the connecting rod 130 to move downwards, and the brake assembly 120 can lock the guide rail 140.

The lifting component 720 comprises at least two lifting rods 721 connected with the lifting base 710 and a rotating rod 722 for driving the lifting rods 721 to move, a lifting motor 723 for driving the rotating rod 722 to rotate is arranged on the base 100, a worm wheel seat 724 is arranged on the base 100, a worm wheel (not marked in the figure) is movably clamped in the worm wheel seat 724, one end of the lifting rod 721 is inserted in the worm wheel, a worm 725 meshed with the worm wheel is arranged on the rotating rod 722, when the lifting seat 710 is required to be lifted relative to the base 100, people only need to control the lifting motor 723 to drive the rotating rod 722 to rotate, because the worm 725 is installed on the rotating rod 722, the worm wheel is movably clamped in the turbine seat, and the lifting rod 721 is inserted into the worm wheel through a thread, the lifting rod 721 is fixedly connected with the lifting base 710, when the worm 725 drives the worm wheel, the worm wheel drives the lifting rod 721 to lift relative to the base 100, so as to achieve the lifting of the lifting base 710 relative to the base 100.

Each brake assembly 120 includes a pair of first hinge rods 121, a pair of second hinge rods 122 and a through rod 123, one end of each first hinge rod 121 is hinged, one end of each second hinge rod 122 is hinged through a connecting plate 124, each first hinge rod 121 is hinged with the adjacent second hinge rod 122, a hinge block 125 is arranged on the through rod 123, the hinge block 125 is hinged with the joint of the two first hinge rods 121, an angle (not marked in the figures) is formed between each first hinge rod 121 and each second hinge rod 122, the angle is an obtuse angle, a brake block 126 is arranged at one end of each second hinge rod 122 far away from the first hinge rod 121, each through rod 123 is provided with a moving plate 123a, each moving plate 123a is slidably connected with the carriage 110, the through rod 123 is connected with the connecting rod 130, when the brake assembly 120 is braked on the guide rail 140, one only needs to operate a lifting motor 723 to enable the lifting seat 710 to descend, because a pressure rod 712 is installed on the lifting seat 710 through an insert sleeve 711, and the pressing rod 712 is located above the connecting rod 130, so that when the pressing rod 712 descends, the pressing rod 712 can press the connecting rod 130 and the moving plate 123a to move towards the base 100 synchronously, because the penetrating rod 123 is connected with the connecting rod 130, the penetrating rod 123 is hinged with the connection part of the two first hinge rods 121 through the hinge block 125, so that after the connecting plate 124 butts against the corresponding guide rail 140, the penetrating rod 123 drives the hinge block 125 to move towards the guide rail 140, because one end of the two first hinge rods 121 is hinged, the first hinge rod 121 is hinged with the adjacent second hinge rod 122, so that the angle between the first hinge rod 121 and the second hinge rod 122 is gradually reduced, that is, the two first hinge rods 121 are unfolded, and in this process, because one end of the two second hinge rods 122 is hinged through the connecting plate 124, the brake block 126 and the first hinge rod 121 are located at the two ends of the second hinge rod 122 respectively, so that the two brake blocks 126 are folded towards the center therebetween, that the corresponding guide rail 140 is clamped by the brake block 126, in the process, the moving plate 123a is movably clamped in the carriage 110 all the time, so that when the braking assembly 120 brakes on the guide rail 140, the braking assembly 120 limits the carriage 110 to move on the guide rail 140, thereby ensuring that the main shaft and the chain wheel can stably rotate when people weld the outer and inner joints.

The base 100 is provided with a guide plate 151, one end of the press rod 712 is provided with a guide wheel 151a movably clamped in the guide plate 151, when the lifting seat 710 is lifted relative to the base 100, the guide wheel 151a is arranged on the press rod 712, and the guide wheel 151a is movably arranged in the guide plate 151, so that the guide wheel 151a can move along the track of the guide plate 151, and the press rod 712 can stably ascend or descend.

The pressing rod 712 is provided with at least two openings 712a corresponding to the connecting rod 130, when the inner side connection is welded, the pressing rod 712 is just below one opening 712a, so that when the pressing rod 712 moves downwards, the pressing rod 712 just fits into the opening 712a, so that the pressing rod 712 can stably press the connecting rod 130 downwards, and when the outer side connection is welded, the pressing rod 712 is just below the other opening 712a, so that when the pressing rod 712 moves downwards, the pressing rod 712 just fits into the opening 712a, so that the pressing rod 712 can stably press the connecting rod 130 downwards.

The driving mechanism 800 includes a first rotating shaft 810, a second rotating shaft 820 and a third rotating shaft 830 movably installed in the stationary housing 200, the first rotating shaft 810 is installed with a second gear 811 and a third gear 812, the second rotating shaft 820 is installed with a fourth gear 821 and a fifth gear 822, the fourth gear 821 is engaged with the third gear 812, the third rotating shaft 830 is installed with a sixth gear 831 engaged with the main gear 311, the sixth gear 831 is engaged with the fifth gear 822, the stationary housing 200 is provided with a driving motor 840, the driving motor 840 is provided with a first gear 841 engaged with the second gear 811, when the driving motor 840 drives the first gear 841 to rotate, the second gear 811, the third gear 812, the fourth gear 821, the fifth gear 822, the sixth gear 831 and the main gear 311 rotate simultaneously, and the diameter of the second gear 811 is larger than that of the fourth gear 821, the first gear 841, the third gear 812, the fourth gear 821, the fifth gear 822, the sixth gear 831 and the main gear 311 are larger than that of the first gear 841, The diameters of the fifth gear 822, the sixth gear 831 and the main gear 311 are the same, and the diameter of the fourth gear 821 is larger than the diameter of the first gear 841, so that the rotation speed output from the main gear 311 is gradually reduced, that is, the rotation speed of the main gear 311 is much smaller than the rotation speed of the first gear 841, so that the driving mechanism 800 can stably drive the left positioning assembly 300 and the left clamping shaft assembly 400 to synchronously rotate, thereby facilitating welding.

step S1, a left chain wheel is placed on the left positioning sleeve 320, the left lug 321 penetrates through the left chain wheel, the bottom of the left chain wheel is positioned on the two positioning rods 713, so that the left chain wheel is positioned, similarly, the right chain wheel is placed on the right positioning sleeve 520, the right lug 521 penetrates through the right chain wheel, the bottom of the right chain wheel is positioned on the two positioning rods 713, so that the right chain wheel is positioned, the spindle is placed on the moving frame 150, the sliding frame and the moving frame are both arranged on the guide rail in a rolling manner, and the central axis of the left clamping shaft assembly coincides with the central axis of the right clamping shaft assembly and coincides with the central axis of the spindle, so that the central axis of the spindle can coincide with the central axes of the two chain wheels;

step S2, the sliding frame 110 is pushed towards the fixed housing 200 until the two ends of the main shaft respectively pass through the corresponding chain wheels, meanwhile, the clamping housing 410 of the left clamping shaft assembly 400 is inserted into the main shaft and abuts against the inside of the main shaft, and the clamping sleeve 610 of the right clamping shaft assembly 600 is inserted into the main shaft;

step S3, separating the positioning rods 713 on the positioning mechanism 700 from the two sprockets, and braking the carriage 110 on the guide rail 140 by the braking assembly 120, so as to avoid the carriage 110 from moving in a dislocation manner during the subsequent welding process and affecting the welding, and thereafter, separating the pressing rod 712 on the positioning mechanism 700 from the braking assembly 120, that is, the lifting assembly 720 drives the lifting seat 710 to rise for a certain distance, and the two positioning rods 713 are not in contact with the sprockets, so as to avoid the positioning rods 713 from affecting the rotation of the sprockets;

in step S3, the left cylinder 450 pushes the left cylinder rod 451, the outer sleeve 420 moves along with the push rod 440, one end of the push rod 440 is connected to the outer sleeve 420, the other end of the push rod 440 is connected to the shaft-locking member 430, and the clamping shell 410 is pressed against the inner part of the spindle at this time, so that the clamping shaft member 430 is unfolded and passes through the clamping shell 410, the spring 340 is compressed by force, when the shaft clamping member 430 presses the inner wall of the main shaft, the left cylinder 450 stops working, so that the left shaft clamping assembly 400 is connected with the main shaft through the shaft clamping member 430, in the process, the left limiting strip 331 always passes through the left limiting hole 441a, the left limiting plate 330 is fixedly connected with the rotating sleeve 310, so that when the rotary sleeve 310 rotates, the left limiting plate 330 drives the limiting block 441, the push rod 440, the outer sleeve 420, the clamping shell 410, the main shaft and the clamping shaft 430 to rotate synchronously, therefore, the synchronous rotation of the left positioning component 300, the left clamping shaft component 400, the main shaft and the left chain wheel can be realized;

step S4, welding the inner side joints of the two chain wheels by a welding gun;

step S5, after the welding is completed, manually lifting the connecting rod 130 upward, releasing the brake of the brake assembly 120, and simultaneously stopping the operation of the driving mechanism 800;

step S6, moving the carriage 110 away from the fixed seat, and at the same time, controlling the left cylinder 450 and the right cylinder 111 to make the push rod 440 push the clamp shell 410 to move away from the rotary sleeve 310, the right cylinder 111 pushing the right cylinder rod 111a and the clamp sleeve 610, and during this process, the clamp shaft 430 is always clamped on the main shaft and the clamp shell 410 is pressed against the main shaft, the clamp sleeve 610 is always inserted in the main shaft, so that the left sprocket and the left positioning sleeve 320 can be separated, and the right sprocket and the right positioning sleeve 520 can be separated;

step S7, after the left positioning assembly 300 and the right positioning assembly 500 are separated from the corresponding sprockets, the sliding frame 110 stops moving, and the lifting assembly 720 drives the lifting seat 710 to descend, so that the braking assembly 120 brakes the sliding frame 110 on the guide rail 140;

step S8, the driving mechanism 800 drives the left positioning component 300 and the left clamping shaft component 400 to rotate synchronously, so that one end of the main shaft is mounted on the left clamping shaft component 400 through the clamping shaft member 430, the other end of the main shaft is movably mounted on the right cylinder rod 111a through the clamping sleeve 610, and the joint of the inner sides of the two chain wheels is welded to enable the main shaft and the chain wheels to rotate synchronously;

step S10, after the welding is completed, the driving mechanism 800 stops operating, the left shaft clamping assembly 400 resets, the right shaft clamping assembly 600 resets, and the main shaft and the sprocket support the main shaft all the time during the welding process, so that the main shaft does not fall off from the moving frame 150 when the left shaft clamping assembly 400 is separated from the main shaft and the right shaft clamping assembly 600 is separated from the main shaft, and thus, the welded main shaft is convenient for people to move.

Through the assembling method for the chain wheel and the main shaft, not only can the accurate installation between the chain wheel and the main shaft be ensured, but also the inner and outer connecting parts of the chain wheel can be smoothly welded, and meanwhile, through the method, the operation difficulty of people can be effectively reduced.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Claims

1. An assembly table for assembling a sprocket with a spindle, comprising:

2. An assembly workbench according to claim 1, wherein the left positioning assembly comprises a rotary sleeve, the rotary sleeve is provided with a main gear connected with a driving mechanism, the rotary sleeve is movably sleeved with at least two snap rings connected with the fixed shell, and an outer bearing is arranged between the snap rings and the rotary sleeve.

3. The assembly workbench according to claim 2, wherein a clamping shell is clamped at one end of the rotary sleeve, the left clamping shaft assembly comprises an outer sleeve capable of moving relative to the rotary sleeve and a clamping shaft member, the clamping shaft member is movably clamped in the clamping shell, and the outer sleeve is connected with the clamping shaft member through a push rod.

4. The assembly workbench according to claim 1, wherein the carriage is provided with a right cylinder for driving the right shaft-clamping assembly to move, and the right cylinder is provided with a right cylinder rod for mounting the right shaft-clamping assembly and the right positioning assembly.

5. The assembly workbench for assembling the chain wheel and the main shaft as claimed in claim 4, wherein the right clamping shaft assembly comprises a clamping sleeve movably sleeved on the right cylinder rod, the right cylinder rod is detachably connected with an anti-dropping sleeve for preventing the clamping sleeve from moving in a dislocation manner, and a left bearing is installed between the clamping sleeve and the right cylinder rod.

6. The assembly station of claim 4, wherein said right positioning assembly comprises a fixed sleeve disposed on the right cylinder rod, said fixed sleeve being detachably connected to the right cylinder rod, said right cylinder rod being movable relative to the fixed sleeve.

7. An assembly workbench according to claim 6, wherein a right positioning sleeve is movably sleeved on the fixed sleeve, a plurality of right protrusions are arranged on the right positioning sleeve, and a right bearing is arranged between the right positioning sleeve and the fixed sleeve.

8. The assembly workbench according to claim 1, wherein the positioning mechanism comprises a lifting seat and a lifting assembly for driving the lifting seat to lift, an insertion sleeve is arranged on one side of the lifting seat, a pressing rod is inserted into the insertion sleeve, at least two braking assemblies are arranged in the carriage, each braking assembly is connected through a same connecting rod, and the pressing rod is located above the connecting rod.

9. An assembly workbench according to claim 2, wherein the driving mechanism comprises a first rotating shaft, a second rotating shaft and a third rotating shaft movably mounted in the fixed housing, the first rotating shaft is mounted with a second gear and a third gear, the second rotating shaft is mounted with a fourth gear and a fifth gear, the fourth gear is engaged with the third gear, the third rotating shaft is mounted with a sixth gear engaged with the main gear, and the sixth gear is engaged with the fifth gear.

10. An assembling method of an assembling table for assembling a sprocket with a spindle, comprising: