CN113816086A - A delivery wagon and assembly line for assembly line - Google Patents

Abstract

The invention discloses a transport vehicle for an assembly production line and the assembly production line, wherein the assembly production line comprises two guide rails which are vertical to each other and the transport vehicle, and the transport vehicle comprises: the vehicle body assembly comprises a vehicle frame for bearing a workpiece and a supporting seat positioned below the vehicle frame, and the vehicle frame can rotate relative to the supporting seat; the wheel assembly is used for driving the vehicle body assembly to move and arranged on the vehicle frame and is movably matched with the guide rail; the lifting mechanism is arranged on the supporting seat and can drive the wheel assembly to move up and down; wherein, be provided with actuating mechanism between supporting seat and the frame, actuating mechanism can drive the relative supporting seat of frame and rotate. Through the cooperation of elevating system, actuating mechanism and supporting seat, can realize the switching of the moving direction of delivery wagon, it is convenient to commutate, and labour saving and time saving is favorable to using in the production line, and the effectual wheel subassembly that prevents receives wearing and tearing.

Description

A delivery wagon and assembly line for assembly line

Technical Field

The invention relates to the technical field of machine assembly production lines, in particular to a conveying vehicle for an assembly production line and the assembly production line.

Background

Existing machine assembly lines typically complete the assembly process by moving a work-piece-bearing transport vehicle along an endless track to pass through various stations; however, when the moving direction of the existing conveying vehicle is switched, the conveying vehicle is manually pushed to rotate and change the direction, or a rotating mechanism is arranged by digging a pit on the bottom surface of the rail change position to drive the conveying vehicle to rotate and change the direction.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a conveying vehicle for an assembly production line, which is convenient to reverse and is beneficial to use in the production line.

The invention further provides an assembly production line applying the conveying vehicle for the assembly production line.

The carrier vehicle for an assembly line according to an embodiment of a first aspect of the present invention includes: the vehicle body assembly comprises a vehicle frame for bearing a workpiece and a supporting seat positioned below the vehicle frame, and the vehicle frame can rotate relative to the supporting seat; the wheel assembly is used for driving the vehicle body assembly to move and arranged on the vehicle frame; the lifting mechanism is arranged on the vehicle body assembly and can drive the vehicle body assembly to move up and down so as to enable the wheel assemblies to move in the same direction; the supporting seat and the frame are provided with a driving mechanism, and the driving mechanism can drive the frame to rotate relative to the supporting seat.

The conveying vehicle for the assembly production line provided by the embodiment of the invention at least has the following beneficial effects: by adopting the structure, when the frame needs to switch the moving direction, the lifting mechanism drives the wheel assembly to move upwards, so that the wheel assembly is moved away from the contact surface, and at the moment, the driving mechanism drives the frame to rotate relative to the supporting seat, so that the moving direction of the frame is switched. Compared with the prior art, this technical scheme need not artifical the promotion, also need not to install the rotating electrical machines through digging pit, through the cooperation of elevating system, actuating mechanism and supporting seat, can realize the switching of the moving direction of delivery wagon, and the switching-over is convenient, and labour saving and time saving is favorable to using in the production line, and the effectual wheel subassembly that prevents receives wearing and tearing.

According to some embodiments of the invention, the drive mechanism comprises: the first driving motor is arranged on the frame; the driving gear is fixedly connected to an output shaft of the first driving motor; the internal gear is arranged on the supporting seat and meshed with the driving gear.

According to some embodiments of the invention, the lifting mechanism comprises: the first worm gear box is arranged on the supporting seat; the first worm is rotatably arranged in the first worm gear box, and two ends of the first worm extend out of the first worm gear box; the first worm wheel is rotatably arranged on the first worm gear box and meshed with the first worm; the first screw rod penetrates through the first worm wheel and is in threaded connection with the first worm wheel; and the second driving motor is arranged on the supporting seat, and an output shaft of the second driving motor is fixedly connected with the first worm.

According to some embodiments of the present invention, the frame includes a first bearing platform and two second bearing platforms respectively located at two sides of the first bearing platform, the second bearing platforms are movably connected to the first bearing platform, and the second bearing platforms can move to extend out or be accommodated in the first bearing platform relative to the first bearing platform.

According to some embodiments of the invention, the first bearing table is provided with a telescopic mechanism, and a telescopic end of the telescopic mechanism is in transmission connection with the second bearing table.

According to some embodiments of the invention, the telescoping mechanism comprises: the second worm gear box is arranged on the first bearing table; the second worm is rotatably arranged in the second worm gear box, and two ends of the second worm extend out of the second worm gear box; the second worm wheel is rotatably arranged on the second worm gear box and is meshed with the second worm; the second screw rod penetrates through the second worm wheel, is in threaded connection with the second worm wheel, and is connected with the second bearing table at one end; and the output shaft of the third driving motor is fixedly connected with the second worm.

The assembly line according to the second aspect embodiment of the present invention includes two guide rails perpendicular to each other, and the transport vehicle for the assembly line according to the first aspect embodiment, wherein the wheel assembly is movably engaged with the guide rails.

The assembly line provided by the embodiment of the invention at least has the following beneficial effects: through guide rail and wheel subassembly removal cooperation, the delivery wagon walks along the predetermined orbit of guide rail, through elevating system drive wheel subassembly rebound, thereby make wheel subassembly remove the guide rail, at this moment, rotate through the relative supporting seat of actuating mechanism drive frame, wheel subassembly and another guide rail contact and move along the guide rail, thereby accomplish and make the changeable its moving direction of delivery wagon, compared with the prior art, this technical scheme need not artifical promotion, also need not to install the rotating electrical machines through digging the pit, through elevating system, the cooperation of actuating mechanism and supporting seat, can realize the switching of the moving direction of delivery wagon, it is convenient to commutate, time saving and labor saving, be favorable to using in the production line, effectually prevent that wheel subassembly from receiving wearing and tearing.

According to some embodiments of the invention, both of the rails are power supply tracks; the frame is provided with a wireless control module and a conducting device electrically connected with the wireless control module, and the conducting device is electrically connected with the two guide rails and can supply power to the wireless control module. According to some embodiments of the invention, an RFID card reader is disposed on the frame and electrically connected to the wireless control module.

According to some embodiments of the present invention, the conductive device includes a first conductive member located at one side of the wheel assembly, one end of the first conductive member being in contact with the wheel assembly, the rail being capable of conducting electricity to the first conductive member by being in contact with the wheel assembly; the second conductive assembly is positioned on one side of the lifting mechanism, one end of the second conductive assembly is connected with the lifting mechanism, and the second conductive assembly can contact with the guide rail along with the lifting mechanism to obtain electric power.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a first perspective structural view of a transport vehicle according to an embodiment of the present invention;

FIG. 2 is a second perspective view of the transport vehicle according to the embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of FIG. 2;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

FIG. 5 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a lifting mechanism and a second conductive assembly according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of the configuration of the two guide rails and the cooperation of the transfer cart of the assembly line according to the embodiment of the present invention;

reference numerals:

the vehicle body assembly 10, the frame 11, the first bearing platform 111, the second bearing platform 112, the supporting seat 12, the fourth driving motor 13 and the wheel assembly 20;

the lifting mechanism 30, the first worm gear case 31, the first worm 32, the first screw rod 33, the flange 331, the insulating block 332 and the second driving motor 34;

a drive mechanism 40, a first drive motor 41, a drive gear 42,

An internal gear 43;

a telescoping mechanism 50, a second worm gear box 51, a second worm 52, a second screw 53 and a third driving motor 54;

guide rails 60, a wireless control module 70, an RFID card reader 80;

a first conductive member 91, a second conductive member 92.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1 to 3 and 5 to 7, a cart for an assembly line according to an embodiment of a first aspect of the present invention includes: the vehicle body assembly 10 comprises a vehicle frame 11 for bearing a workpiece and a supporting seat 12 positioned below the vehicle frame 11, wherein the vehicle frame 11 can rotate relative to the supporting seat 12; the wheel assembly 20 is used for driving the vehicle body assembly 10 to move, and the wheel assembly 20 is arranged on the frame 11; the lifting mechanism 30 is arranged on the supporting seat 12, and the lifting mechanism 30 can drive the wheel assembly 200 to move up and down; wherein, a driving mechanism 40 is arranged between the support base 12 and the frame 11, and the driving mechanism 40 can drive the frame 11 to rotate relative to the support base 12.

According to the conveying vehicle for the assembly line of the embodiment of the invention, with the structure, when the vehicle frame 11 needs to switch the moving direction, the lifting mechanism 30 drives the wheel assembly 20 to move upwards, so that the wheel assembly 20 is moved away from the contact surface, and at the moment, the driving mechanism 40 drives the vehicle frame 11 to rotate relative to the supporting seat 12, so that the moving direction of the vehicle frame 11 is switched. Compared with the prior art, this technical scheme need not artifical the promotion, also need not to install the rotating electrical machines through digging the pit, through elevating system 30, actuating mechanism 40 and supporting seat 12's cooperation, can realize the switching of the moving direction of delivery wagon, and the switching-over is convenient, and labour saving and time saving is favorable to using in the production line, and effectual wheel subassembly 20 that prevents receives wearing and tearing.

It should be noted that, in some embodiments of the present invention, the lifting mechanism 30 is disposed on the supporting seat 12, and the lifting mechanism 30 drives the supporting seat 12 to move upward, so that the frame 11 moves upward, and then drives the wheel assembly 20 to move upward, thereby disengaging from the contact surface. Of course, in some embodiments, the lifting mechanism may also be disposed on the frame 11, the wheel assembly 20 is in transmission connection with the lifting mechanism 30, and the lifting mechanism 30 can drive the wheel assembly 20 to move up and down.

It will be appreciated that in some embodiments of the invention, as shown in figures 3 and 5, the drive mechanism 40 comprises: a first drive motor 41 provided to the frame 11; a drive gear 42 fixedly connected to an output shaft of the first drive motor 41; the internal gear 43 is provided on the support base 12, and the internal gear 43 meshes with the drive gear 42. Adopt above-mentioned structure, when elevating system 30 drive supporting seat 12 rebound, make frame 11 along with rebound, thereby drive wheel subassembly 20 and break away from the contact surface, at this moment, the first driving motor 41 drive gear 42 of accessible rotates, because the fixed setting of inner gear 43 relative supporting seat 12, first driving motor 41 is fixed to be set up relative frame 11, inner circle and the drive gear 42 internal gearing through inner gear 43, thereby drive gear 42 rotates along the inner circle of inner gear 43, then drive frame 11 and rotate, thereby accomplish the switching-over, the transmission precision is high, the transmission efficiency is high, and the reliable operation, long service life, and application scope is wide.

Of course, in some embodiments, the driving mechanism 40 may also be a crank-type rotating mechanism, which still has the above-mentioned effects, and is not limited herein.

It will be appreciated that, as shown in fig. 1, 2, 3 and 6, in some embodiments of the invention, the lift mechanism 30 comprises: a first worm gear case 31 provided on the support base 12; the first worm 32 is rotatably arranged on the first worm gear case 31, and two ends of the first worm 32 extend out of the first worm gear case 31; a first worm wheel rotatably provided in the first worm gear case 31 and engaged with the first worm 32; the first screw rod 33 penetrates through the first worm wheel, and the first screw rod 33 is in threaded connection with the first worm wheel; and the second driving motor 34 is arranged on the supporting seat 12, and an output shaft of the second driving motor 34 is fixedly connected with the first worm 32. It should be noted that, the one end of keeping away from supporting seat 12 on the first lead screw 33 is provided with ring flange 331, adopt above-mentioned structure, rotate through the first worm 32 of second driving motor 34 drive, thereby it rotates to drive first worm wheel, make first lead screw 33 remove supporting seat 12 dorsad then, with through ring flange 331 butt contact surface, raise supporting seat 12 and frame 11 then, thereby take off the contact with the bottom surface and the contact surface of wheel subassembly 20, then drive frame 11 through actuating mechanism 40 and rotate, in order to realize the switching-over, moreover, the steam generator is simple in structure, easily realize, manufacturing cost is lower, the automation degree is high, the work efficiency is effectively improved, and the production demand is met.

It should be noted that, in some embodiments of the present invention, the number of the lifting mechanisms 30 is four, and the four lifting mechanisms 30 are respectively disposed at four corners of the supporting base 12 at intervals, so that the supporting base 12 is relatively stable when moving. Of course, in some embodiments, the number of the lifting mechanisms 30 may be other, and is not limited herein.

Of course, in some embodiments, the lifting mechanism 30 may be configured as an electric push rod or a lead screw nut, which still has the above-mentioned effects, and is not limited herein.

It is understood that, as shown in fig. 1 to 4, in some embodiments of the present invention, the frame 11 includes a first platform 111 and two second platforms 112 respectively disposed at two sides of the first platform 111, the second platforms 112 are movably connected to the first platform 111, and the second platforms 112 can move to extend out of or be accommodated in the first platform 111 relative to the first platform 111. With the above structure, the second bearing platform 112 moves to extend out of the first bearing platform 111, so that the carrying area of the frame 11 is increased; when the second platform 112 moves to be accommodated in the first platform 111, the overall size of the frame 11 is further reduced, which is convenient for storage or transportation, and the frame has various structures and a wide application range.

It can be understood that, in some embodiments of the present invention, the first bearing platform 111 is provided with the telescopic mechanism 50, and the telescopic end of the telescopic mechanism 50 is in transmission connection with the second bearing platform 112, so that the structure is simple, the transmission is stable and reliable, and the automatic operation is realized.

As shown in fig. 2, 3 and 4, in some embodiments of the present invention, the telescoping mechanism 50 comprises: a second worm gear case 51 provided on the first stage 111; a second worm 52 rotatably disposed on the second worm gear case 51, and two ends of the second worm 52 extend out of the second worm gear case 51; a second worm wheel rotatably provided in the second worm gear case 51 and engaged with the second worm 52; the second screw 53 penetrates through the second worm wheel, the second screw 53 is in threaded connection with the second worm wheel, and one end of the second screw 53 is connected with the second bearing table 112; and a third driving motor 54 disposed on the first stage 111, wherein an output shaft of the third driving motor 54 is fixedly connected to the second worm 52. By adopting the structure, the third driving motor 54 drives the second worm 52 to rotate, so as to drive the second worm wheel to rotate, and then the second lead screw 53 drives the second bearing platform 112 to move relative to the first bearing platform 111, so that the second bearing platform 112 extends out or is contained in the first bearing platform 111.

It should be noted that, in some embodiments of the present invention, the wheel assembly 20 is connected to the first bearing platform 111, the number of the telescopic mechanisms 50 is four, and each two groups of telescopic mechanisms 50 are matched with one second bearing platform 112, so that the movement stability is good. Of course, in some embodiments, the number of the telescopic mechanisms 50 may be other, and is not limited herein.

Of course, in some embodiments, the telescopic mechanism 50 may be configured as an electric push rod or a lead screw nut, which still has the above-mentioned effect, and is not limited herein.

As shown in fig. 1 to 3 and 5 to 7, the assembly line according to the second embodiment of the present invention includes two guide rails 60 perpendicular to each other and the conveyor car for the assembly line of the first embodiment, and the wheel assemblies 20 are movably engaged with the guide rails 60.

According to the assembly production line provided by the embodiment of the invention, the guide rail 60 is movably matched with the wheel assembly 20, the transport vehicle travels along the preset track of the guide rail 60, the wheel assembly 20 is driven to move upwards by the lifting mechanism 30, so that the wheel assembly 20 is moved away from the guide rail 60, at the moment, the frame 11 is driven by the driving mechanism 40 to rotate relative to the supporting seat 12, and the wheel assembly 20 is contacted with the other guide rail 60 and moves along the guide rail 60, so that the transport vehicle can switch the moving direction of the transport vehicle.

It should be noted that, when the frame 11 rotates relative to the support base 12, the support base 12 is fixed relative to the guide rail 60 by the self weight of the support base 12 and the self weight of the lifting mechanism 30.

As shown in fig. 2, 3 and 7, in some embodiments of the invention, both rails 60 are power supply tracks; the frame 11 is provided with a wireless control module 70 and a conductive device electrically connected with the wireless control module 70, wherein the conductive device is electrically connected with the two guide rails 60 and can supply power to the wireless control module 70. By adopting the structure, the wireless control module 70 can be controlled wirelessly, so that the motion and power on-off of the delivery wagon are controlled, the power consumption is greatly saved while the operation personnel is protected, and the production efficiency is favorably improved.

As shown in fig. 2 and 3, in some embodiments of the present invention, an RFID reader 80 is disposed on the frame 11, and the RFID reader 80 is electrically connected to the wireless control module 70. The RFID card reader 80 is used for identifying the position information of the transport vehicle so as to control the residence time of the transport vehicle at each station and improve the assembly production efficiency.

As shown in fig. 2, 3 and 6, in some embodiments of the present invention, the conductive device includes a first conductive member 91, the first conductive member 91 being located at one side of the wheel assembly 20, one end of the first conductive member 91 being in contact with the wheel assembly 20, the guide rail 60 being capable of conducting electricity to the first conductive member 91 by being in contact with the wheel assembly 20; and a second conductive member 92, the second conductive member 92 being located at one side of the lifting mechanism 30, one end of the second conductive member 92 being connected to the lifting mechanism 30, the second conductive member 92 being capable of receiving power when the lifting mechanism 30 contacts the guide rail 60. It should be noted that the second conductive member 92 is connected to the flange 331 of the lifting mechanism 30 by bolts. With the above-described structure, when the wheel assembly 20 moves along one of the guide rails 60, the guide rail 60 supplies power to the first conductive member 91 by contacting the wheel assembly 20; when switching the moving direction of delivery wagon, the ring flange 331 butt and the guide rail 60 of first lead screw 53 through upgrading mechanism, second conductive component 92 butt guide rail 60 simultaneously this moment, thereby supply power in second conductive component 92, it is rotatory to drive frame 11 through actuating mechanism 40 afterwards, elevating system 30's first lead screw 53 resets, wheel subassembly 20 contacts with another guide rail 60, thereby realize the switching-over, the outage phenomenon appears when the switching moving direction of delivery wagon has been prevented, moreover, the steam generator is simple and reasonable in structure, and easy to manufacture, the normal driving of delivery wagon is not influenced simultaneously.

It should be noted that, in some embodiments of the present invention, an end surface of the flange 331 of the first lead screw 53 facing the guide rail 60 is connected to an insulating block 332, an end of the second conductive element 92 is connected between the insulating block 332 and the flange 331, and the flange 331 abuts against the guide rail 60 through the insulating block 332, so that current generated by the frame 11 due to conduction through the first lead screw 53 is avoided, and safety performance is improved.

It can be understood that, as shown in fig. 1 to 3 and fig. 6, in some embodiments of the present invention, each of the first conductive component 91 and the second conductive component 92 includes a mounting bracket, a sliding block, a spring, and a conductive block, the mounting bracket of the first conductive component 91 is connected to the frame 11, the mounting bracket of the second conductive component 92 is connected to the flange 331 of the first lead screw 53, the mounting bracket is provided with a positioning boss, the sliding block is mounted on one end of the positioning boss facing away from the mounting bracket through a fixing bolt, the sliding block can be slidably disposed relative to the fixing bolt, the spring is sleeved on the positioning boss, one end of the spring abuts against the mounting bracket, the other end abuts against the sliding block, and the conductive block is mounted on one end face of the sliding block facing away from the mounting bracket. By adopting the structure, the conductive block is in elastic contact with the guide rail 60, so that the buffer effect is achieved, and the service life is prolonged.

It should be noted that, in some embodiments of the present invention, the frame 11 is further provided with a fourth driving motor 14 for driving the wheel assembly 20 to rotate; the number of the wheel assemblies 20 is two, wherein one wheel assembly 20 is in transmission connection with the fourth driving motor 13; the wheel assembly 20 comprises a rotating shaft and a plurality of wheels connected with the rotating shaft, and an insulating part is arranged between each wheel and the rotating shaft, so that the wheels are prevented from conducting electricity on the rotating shaft, and the safety performance is improved; the intersection of the two guide rails 60 is provided with a limiting groove to limit the lifting mechanism 30 to slide relative to the guide rails 60, so as to improve the stability of the conveying vehicle when the driving mechanism 40 drives the vehicle frame 11 to rotate.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (10)

1. A delivery wagon for assembling line, characterized by comprising:

the vehicle body assembly (10) comprises a vehicle frame (11) for bearing a workpiece and a supporting seat (12) positioned below the vehicle frame (11), wherein the vehicle frame (11) can rotate relative to the supporting seat (12);

the wheel assembly (20) is used for driving the vehicle body assembly (10) to move, and the wheel assembly (20) is arranged on the vehicle frame (11);

a lifting mechanism (30) which is arranged on the vehicle body assembly (10), wherein the lifting mechanism (30) can drive the wheel assembly (20) to move up and down;

a driving mechanism (40) is arranged between the supporting seat (12) and the frame (11), and the driving mechanism (40) can drive the frame (11) to rotate relative to the supporting seat (12).

2. Conveyor car for assembly lines according to claim 1, characterized in that said drive mechanism (40) comprises:

a first drive motor (41) provided to the frame (11);

a drive gear (42) fixedly connected to an output shaft of the first drive motor (41);

and an internal gear (43) which is provided on the support base (12) and in which the internal gear (43) is meshed with the drive gear (42).

3. The conveyor car for an assembly line according to claim 1, characterized in that the lifting mechanism (30) comprises:

a first worm gear case (31) arranged on the support base (12);

the first worm (32) is rotatably arranged on the first worm gear box (31), and two ends of the first worm (32) extend out of the first worm gear box (31);

a first worm wheel rotatably provided in the first worm gear case (31) and engaged with a first worm (32);

the first screw rod (33) penetrates through the first worm wheel, and the first screw rod (33) is in threaded connection with the first worm wheel;

the second driving motor (34) is arranged on the supporting seat (12), and an output shaft of the second driving motor (34) is fixedly connected with the first worm (32).

4. The trolley for an assembly line according to claim 1, wherein the frame (11) comprises a first bearing platform (111) and two second bearing platforms (112) respectively located at two sides of the first bearing platform (111), the second bearing platforms (112) are movably connected to the first bearing platform (111), and the second bearing platforms (112) can move relative to the first bearing platform (111) to extend out or be accommodated in the first bearing platform (111).

5. Transport carriage for an assembly line according to claim 4, characterized in that a telescopic mechanism (50) is arranged on the first carriage (111), and a telescopic end of the telescopic mechanism (50) is in driving connection with the second carriage (112).

6. Conveyor car for assembly lines according to claim 5, characterized in that said telescopic mechanism (50) comprises:

a second worm gear case (51) provided on the first stage (111);

the second worm (52) is rotatably arranged on the second worm gear box (51), and two ends of the second worm (52) extend out of the second worm gear box (51);

a second worm wheel rotatably provided in the second worm gear case (51) and engaged with a second worm (52);

the second screw rod (53) penetrates through the second worm wheel, the second screw rod (53) is in threaded connection with the second worm wheel, and one end of the second screw rod (53) is connected with the second bearing table (112);

and the third driving motor (54) is arranged on the first bearing table (111), and an output shaft of the third driving motor (54) is fixedly connected with the second worm (52).

7. Assembly line, characterized in that it comprises two mutually perpendicular guide rails (60) and a conveyor car for an assembly line according to any one of claims 1 to 6, said wheel assembly (20) being in mobile engagement with said guide rails (60).

8. Assembly line according to claim 7, wherein both said guide rails (60) are power supply tracks;

the bicycle frame (11) is provided with a wireless control module (70) and a conducting device electrically connected with the wireless control module (70), wherein the conducting device is electrically connected with the two guide rails (60) and can supply power to the wireless control module (70).

9. The assembly line according to claim 8, characterized in that an RFID reader (80) is arranged on the carriage (11), the RFID reader (80) being electrically connected to the wireless control module (70).

10. The assembly line of claim 9, wherein the conductive means comprises:

a first conductive member (91), the first conductive member (91) being located at one side of the wheel assembly (20), one end of the first conductive member (91) being in contact with the wheel assembly (20), the rail (60) being capable of conducting electricity to the first conductive member (91) by being in contact with the wheel assembly (20);

the second conductive assembly (92) is positioned on one side of the lifting mechanism (30), one end of the second conductive assembly (92) is connected with the lifting mechanism (30), and the second conductive assembly (92) can obtain power along with the contact between the lifting mechanism (30) and the guide rail (60).

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