CN211811900U - Automatic workpiece transport vehicle - Google Patents

Abstract

The utility model discloses a work piece automatic transportation car for carry out automated transportation and operation to the work piece after being heated between each process cell body of thermal treatment production line, it includes: the device comprises a vehicle body, a walking device, a lifting device, a guide device and a control device; the bottom of the vehicle body is provided with a workpiece inlet and a workpiece outlet which penetrate through the inside and the outside of the vehicle body; the walking device comprises a plurality of wheels which are symmetrically distributed around the workpiece inlet and outlet at the bottom of the vehicle body and a driving motor which is arranged on the vehicle body and drives the wheels to move and turn; the lifting device comprises a lifting frame arranged in the vehicle body and a lifting drive which is arranged on the vehicle body and can drive the lifting frame to lift up and down, and the lifting frame can place the workpiece in the process tank body or take the workpiece out of the process tank body and keep the workpiece in the vehicle body under the drive of the lifting drive; the guide device and the control device are arranged on the vehicle body and are electrically connected with each other; the control device is electrically connected with the driving motor and the lifting drive.

Description

Automatic workpiece transport vehicle

Technical Field

The utility model relates to a work piece transfer equipment especially relates to a work piece automatic transport vehicle that is used for carrying out automated transportation and operation to the work piece after being heated between each process cell body of thermal treatment production line.

Background

At present, in the field of workpiece heat treatment, a roller hearth furnace is mostly adopted for heating workpieces (particularly bearing workpieces), after the workpieces are heated, mesh belts, roller rods, truss manipulators or roller rod platforms are usually adopted to match with the truss manipulator device to carry out transfer to the procedures of quenching, tempering (or isothermal), air cooling, cleaning, unloading and the like, wherein the procedures of quenching, isothermal, cleaning and the like are usually operated by using a trough body. In actual production, the above workpiece transfer mode has the following disadvantages: 1. the workpiece transfer system has more components, more complex system structure and higher investment and operation cost; 2. the truss manipulator needs to be arranged above the process equipment, so that the operation space occupied by the workpiece transfer system constructed by the truss manipulator is huge, the operation and maintenance are inconvenient, and the safety coefficient is low; 3. the work transfer system constructed by the mesh belt, the roller bar and the truss manipulator is generally operated linearly, that is, the transfer of the heated work among the processes is performed on duty according to the structure of the work transfer system, so that the work transfer operation efficiency is not high, and if the process sequence is adjusted or the related processes are supplemented/cancelled, the work transfer system needs to be reconstructed, so that the operation flexibility and expansibility are poor; 4. once a problem occurs in a certain process link in the middle of the workpiece transfer system constructed by the device, the whole workpiece transfer system needs to be stopped for maintenance, and the production efficiency of the whole workpiece heat treatment production line is influenced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the technical scheme is to provide the automatic workpiece transport vehicle which can simplify the structure of the workpiece transfer system of the heat treatment production line, reduce the occupation of the workpiece transfer operation space, improve the flexibility and expansibility of the process operation, reduce the maintenance difficulty and improve the heat treatment production efficiency of the workpiece.

In order to solve the technical problem, the technical scheme provides an automatic workpiece transport vehicle which is used for automatically transporting and operating a heated workpiece between all process groove bodies of a heat treatment production line, and comprises: the device comprises a vehicle body, a walking device, a lifting device, a guide device and a control device; wherein, the bottom of the vehicle body is provided with a workpiece inlet and a workpiece outlet which run through the inside and the outside of the vehicle body; the walking device comprises a plurality of wheels and a driving motor, wherein the wheels are symmetrically distributed around a workpiece inlet and a workpiece outlet at the bottom of the vehicle body; the lifting device comprises a lifting frame and a lifting drive, wherein the lifting frame is arranged in the vehicle body, and the lifting drive is arranged on the vehicle body and can drive the lifting frame to lift up and down so that the lifting frame can place the workpiece in the process tank body or take out the workpiece from the process tank body and place the workpiece in the vehicle body; the guide device and the control device are arranged on the vehicle body and are electrically connected with each other; the control device is electrically connected with the driving motor and the lifting drive. Therefore, the automatic workpiece transport vehicle can be used as an independent operation transfer unit for carrying the heated workpieces, so that the processing and transfer operation of the workpieces can be carried out among the process groove bodies of the heat treatment production line, the application of conveying members (such as mesh belts, roller rods and the like) and process operation members (such as mechanical arms, lifting devices and the like) among the processes can be saved, the structure of the heat treatment production line is simplified, the occupation of the workpiece transfer operation space is reduced, and the operation cost is reduced; in addition, flexible adjustment and expansion of relevant procedures in the heat treatment production line can be realized (such as adjusting the operation sequence of the procedures or adding new procedures), and multi-task parallel operation can be realized, so that the heat treatment production efficiency of workpieces is improved; in addition, the automatic workpiece transport vehicle with faults can be replaced and maintained in time, the maintenance difficulty of the workpiece transfer system is reduced, and the stable operation of a heat treatment production line is ensured.

As another implementation of the technical scheme, the automatic workpiece transport vehicle further comprises a liquid receiving device, wherein the liquid receiving device comprises two L-shaped guide rails, two guide chains, a furling motor and a liquid receiving disc; wherein the horizontal sections of the two L-shaped guide rails are symmetrically arranged at the outer side of the bottom of the vehicle body and positioned at two sides of the workpiece inlet and outlet, the vertical sections of the two L-shaped guide rails extend from the end parts of the horizontal sections and are formed upwards and are positioned at one side of the vehicle body, the joint part of the horizontal section and the vertical section is in a round angle shape, the horizontal section, the vertical section and the joint part of the L-shaped guide rail are provided with guide grooves which are communicated with each other integrally, and the guide grooves of the two L-shaped guide rails are oppositely arranged and the joint part is provided with a notch facing the vehicle body, the two guide chains are arranged in the two guide grooves in a penetrating way, the length of the guide chains is less than that of the guide grooves, the furling motor is fixedly arranged at the outer side of the vehicle body, is adjacent to the combining part and is electrically connected with the control device, two chain wheels are sleeved on an output long shaft of the furling motor, the two chain wheels are meshed with the guide chains in the guide groove through notches in the joint parts of the two L-shaped guide rails, and a liquid receiving disc is arranged between the two guide chains in the area below the inlet and the outlet of the workpiece. Therefore, the two chain wheels are driven by the furling motor to rotate forwards or reversely, so that the two guide chains can be driven to move in the guide grooves of the two L-shaped guide rails, and the liquid receiving disc is controlled to be positioned below the workpiece inlet and outlet or moved away from the lower part of the workpiece inlet and outlet. The arrangement of the liquid receiving device can effectively prevent the medium (such as quenching salt, quenching oil or cleaning liquid) adhered to the workpiece in the vehicle body from dropping on the road surface of the passage between the working procedures after the workpiece is subjected to certain working procedure operations (such as quenching or cleaning).

As another implementation of the technical scheme, the liquid receiving plate is formed by splicing two end liquid receiving jointed plates, at least one middle liquid receiving jointed plate and a plurality of penetrating rods, and the end liquid receiving jointed plates and the middle liquid receiving jointed plates are rectangular; the long edge of the adjacent joint part of the middle liquid-receiving jointed plate is formed with a first turned edge with a circular arc-shaped section and an upward opening, and the long edge of the joint part away from the first turned edge is formed with a second turned edge with a circular arc-shaped section and a downward opening; an upward flange is formed on the end liquid-receiving jointed plate of the adjacent joint part towards the long edge of the joint part, and a second turned edge is formed on the long edge far away from the joint part; the edge of the long edge of the end liquid-receiving jointed plate far away from the joint part and facing the joint part is formed with a first turned edge, and the edge of the long edge far away from the joint part is formed with an upward flange; the short edge edges of the end liquid-receiving jointed boards and the middle liquid-receiving jointed boards are both provided with upward flanges; the flanges formed at the edges of the long sides and the short sides of the end liquid-receiving jointed boards and the flanges formed at the edges of the short sides of the middle liquid-receiving jointed boards form liquid-receiving spaces together; the liquid receiving plates at the end parts of the adjacent joint parts, the liquid receiving plates at the at least one middle part and the liquid receiving plates at the end parts far away from the joint parts form the liquid receiving plate through the mutual sleeving of the first turned edge and the second turned edge and the penetration rods at the sleeving parts, and the two ends of the penetration rods are respectively fixed at the chain links of the two guide chains. Therefore, the liquid receiving disc can move along with the displacement of the two guide chains, and can deform at the joint part of the L-shaped guide rail without liquid leakage.

As another implementation of the technical scheme, the liquid receiving jointed board at the end part far away from the joint part is provided with an inclined board surface which is concave downwards towards the middle part and a liquid collecting box which is arranged on the lower side surface, and the bottom of the inclined board surface is provided with a leakage opening communicated with the inside of the liquid collecting box. Accordingly, the liquid in the liquid receiving tray can be conveniently collected.

In another embodiment of the present invention, the vehicle body is rectangular and includes a plurality of steel frame rods and a plurality of heat-insulating inner panels, the ends of the steel frame rods are connected to form long sides and short sides of the vehicle body, the plurality of heat-insulating inner panels are mounted and fixed between the long sides and the short sides of the vehicle body to form a surface of the rectangular vehicle body, and the work entrance and exit are provided on the heat-insulating inner panels at the bottom of the vehicle body. Therefore, the heat exchange degree of the inside and the outside of the vehicle body can be reduced, the temperature of the workpiece in the vehicle body in the transfer process is ensured, and the subsequent processing quality of the workpiece is ensured.

In another implementation of the technical scheme, the fixed heat-insulating inner container plate is not installed at the bottom of the vehicle body, and the bottom of the vehicle body directly forms a workpiece inlet and a workpiece outlet which penetrate through the inside and the outside of the vehicle body. Thereby, the manufacturing cost of the vehicle body can be simplified.

As another implementation of the technical scheme, metal plate bodies are arranged on the inner side and the outer side of the heat-insulation inner container plate and fixed on the steel frame rod. The metal plate body can effectively prevent medium vapor emitted from the workpiece after the working procedure operation from permeating to the outside of the vehicle body.

As another implementation of the technical solution, the lifting drive is a lifting motor, the lifting frame includes a beam frame, four suspension arms, two suspension arms, and two lifting rack bars, the beam frame is a rectangular frame, the four suspension arms are respectively and vertically fixed below two opposite frame sides of the beam frame, the two suspension arms on each frame side have the same interval and are correspondingly arranged, the two suspension arms are respectively and horizontally fixed between the two suspension arms on each frame side, one side of each of the two lifting rack bars has a tooth portion, the two lifting rack bars are vertically penetrated through the upper portion of the vehicle body, the lower end portions of the two lifting rack bars are symmetrically and fixedly connected to the two opposite frame sides of the beam frame, the upper end portions of the two lifting rack bars penetrate through and extend out of the upper portion of the vehicle body, two guide seats guiding the lifting rack bars to move up and down are arranged at the penetrating positions of the two lifting rack bars on the upper portion of the vehicle body, the lifting motor is fixed on, the two gears are meshed with the teeth parts of the two lifting toothed bars at the two guide seats. Therefore, the lifting motor can stably control the lifting of the lifting frame.

As another implementation of the present technical solution, the automatic workpiece transporting vehicle further includes: the material carrying basket is composed of multiple groups of ㄩ -shaped steel plates, a heat insulation layer plate and at least four lifting handles, the multiple groups of ㄩ -shaped steel plates are fixedly arranged on the lower side surface of the heat insulation layer plate side by side at the same distance, the at least four lifting handles are divided into two groups and are vertically and fixedly arranged on the upper side surface of the heat insulation layer plate corresponding to the two lifting rods, hook parts are arranged at the upper ends of the lifting handles, and the workpiece is placed in a cavity formed by the multiple groups of ㄩ -shaped steel plates and the heat insulation layer plate in a surrounding mode. Therefore, the workpieces can be uniformly placed in the process medium (quenching salt, quenching oil or cleaning fluid and the like) during the process operation, and the heat insulation and preservation laminated plate can effectively prevent the interference of the external environment temperature during the process operation, thereby ensuring the processing quality of the workpieces.

As another implementation of the technical scheme, the driving motor comprises two traveling motors and two steering motors which are electrically connected with the control device, the number of the wheels is four, and the wheels are symmetrically distributed around a workpiece inlet and a workpiece outlet at the bottom of the vehicle body, wherein the two wheels on one diagonal are driving wheels and are respectively provided with one traveling motor and one steering motor, the traveling motors can drive the driving wheels to move, and the steering motors can drive the driving wheels to change directions; and two wheels on the other diagonal line are driven universal bearing wheels. Therefore, the control device can realize the advancing or retreating and flexible steering of the two driving wheels on the same diagonal line, and meanwhile, the two driven universal bearing wheels on the other diagonal line can move or steer along with the driving wheels and can bear the weight of the vehicle body and the workpiece, so that the automatic workpiece transport vehicle can accurately and flexibly move among the processes of the heat treatment production line.

Drawings

FIG. 1 is a top view of an automated production line for heat treatment of workpieces having a process transfer cart according to the present disclosure;

FIG. 2 is a schematic view of the automatic workpiece transporting vehicle in the quenching tank for extracting the workpiece according to the present disclosure;

FIG. 3 is a side sectional view of the automatic workpiece transporter in accordance with the present teachings;

FIG. 4 is a front cross-sectional view of another embodiment of an automated workpiece transporter in accordance with the teachings of the present disclosure;

FIG. 5 is a schematic view of the driving wheel structure according to the present embodiment;

FIG. 6 is another schematic view of the driving wheel structure of the present embodiment;

FIG. 7 is a schematic view of a liquid receiving tray in the automatic workpiece transport vehicle according to the present disclosure;

FIG. 8 is a schematic view of a loading basket in the automatic workpiece transport vehicle according to the present disclosure;

FIG. 9 is a front cross-sectional view of another embodiment of an automated workpiece transporter in accordance with the teachings of the present disclosure;

fig. 10 is a schematic view of the automatic workpiece transport vehicle in the technical scheme lowering the loading basket loaded with the workpiece into the process tank body.

Fig. 11 is a schematic view of the operation of the automatic workpiece transport vehicle between the process tanks in the technical scheme.

Symbolic illustration in the drawings:

1 automatic production line for heat treatment of workpieces with automatic process transfer transport vehicles; 2 heating the furnace body; 3, automatic workpiece transport vehicle; 31 a vehicle body; 32 a guide device; 33 a control device; 4, a groove body; 41 quenching tank; 411 quenching tank body; 412 a workpiece lifting device; 4121 a thermally insulated housing; 4122 lifting drive motor; 4123 lifting and lowering frames; 4124 carrying a tray; 4125 a first conveying member; 4126 a first conveyance drive motor; 413 a workpiece extraction tank body; 4131 a second conveyance member; 42, a process lane; 51 wheels of the vehicle; a 52 walking motor; 53 steering motor; 6, lifting a frame; 61 beam frames; 62, a suspension arm; 63 a boom; 64 lifting the toothed bar; 65 a guide seat; 66 a lift motor; a 7L-shaped guide rail; 71 a horizontal segment; 72 a vertical section; 73 a joining part; 74 guide grooves; 75 a guide chain; 76 a furling motor; 8, a liquid receiving disc; the 81 end part is connected with a liquid splicing plate; 82 connecting the liquid splicing plates in the middle; 83 penetrating a rod; 84 a first curl; 85 second curling edge; 86 a flange; 87 a liquid collection box; 9, a loading basket; 91 ㄩ steel plate; 92 heat insulation and preservation layer plate; 93 a handle; 931 hook part; 10, workpiece; 11 a workpiece pressure quenching system; 111 pressure quenching transfer car; 112 quenching press; 113 pressure quenching and oil cleaning machine; 114 and returning the pressure quenched workpiece to the platform.

Detailed Description

The technical details and technical contents of the present invention are described below with reference to the drawings, but the drawings are only for reference and illustration and are not intended to limit the present invention.

A conventional heat treatment line is generally composed of process members such as a workpiece handling apparatus, a heating furnace, a quenching tank, an isothermal tank, a cleaning tank, a cooling apparatus, and a workpiece transfer system. The technical scheme provides the automatic production line for workpiece heat treatment, which can simplify the structure of the workpiece transfer system of the heat treatment production line, reduce the occupation of the workpiece transfer operation space, improve the flexibility and expansibility of the process operation, realize the accurate operation of the automatic transfer of the workpiece, reduce the maintenance difficulty and improve the production efficiency of the workpiece heat treatment. The technical scheme utilizes the automatic workpiece transport vehicle to replace a workpiece transfer system and part of operation components in the traditional heat treatment production line, so that the heat treatment production line has the advantages of saving conveying components such as mesh belts, roller rods and the like and saving operation components such as manipulators, lifting devices and the like, and can replace and maintain the automatic fault workpiece transport vehicle at any time, thereby reducing the operation cost and improving the production efficiency.

As shown in fig. 1, it is an embodiment of the present technical solution: a top view of an automatic production line for heat treatment of a workpiece having a process transfer automatic transport vehicle, hereinafter referred to as an automatic production line 1 for heat treatment of a workpiece. This workpiece heat treatment automatic production line 1 includes: the heating furnace comprises a workpiece heating system, a plurality of process tanks 4, at least one automatic workpiece transport vehicle 3 and a central control system (not shown), wherein the workpiece heating system can comprise a feeding table (not shown), a front cleaning machine (not shown), a transition table (not shown) and a heating furnace body 2, the heating furnace body 2 can be various workpiece heating furnace bodies, and the technical scheme is exemplified by a roller-hearth type heating furnace body with protective atmosphere. The plurality of process tank bodies 4 are arranged at the discharge end of the heating furnace body 2 according to the process sequence, the plurality of process tank bodies 4 can comprise a quenching tank, an isothermal tank, a tempering tank, a cleaning tank, a draining tank and the like, the types and the number of the process tank bodies 4 can be flexibly arranged according to the actual operation requirement of the automatic workpiece heat treatment production line 1, and a discharge platform (not shown) is usually arranged at the tail end of the plurality of process tank bodies 4 so as to load and unload the workpieces processed by the automatic workpiece heat treatment production line 1 on a carrying tool. Referring to fig. 3, the automatic workpiece transporter 3 of the present embodiment has a guiding device 32 and a control device 33 electrically connected to each other, the central control system can guide the at least one automatic workpiece transporter 3 to move on the process lanes 42 between the plurality of process tanks 4 through the guiding device 32, and the central control system can control the at least one automatic workpiece transporter 3 to place or take out the workpieces heated by the workpiece heating system on the process tanks 4 through the control device 33. Accordingly, the automatic workpiece transport vehicle 3 with the guide device 32 and the control device 33 can perform subsequent process operation on the workpiece heated by the workpiece heating system, the automatic workpiece transport vehicle 3 can be used as an independent operation transfer unit for carrying the workpiece, and the central control system can precisely control the automatic workpiece transport vehicle 3 to travel among the process tank bodies 4 and operate the workpiece on the process tank bodies 4 through the guide device 32 and the control device 33, so that application of conveying members (such as mesh belts, roller rods and the like) and process operation members (such as mechanical arms, lifting devices and the like) among the processes can be saved, the structure of the automatic workpiece heat treatment production line 1 is simplified, occupation of workpiece transfer operation space is reduced, and investment of operation cost is reduced; in addition, flexible adjustment and expansion of related processes (such as isothermal process, tempering process, cleaning process, draining process and the like) in the automatic workpiece heat treatment production line 1 can be realized (such as adjustment of the operation sequence of process tanks or addition of new process tanks), and multi-task simultaneous operation of a single automatic workpiece transport vehicle or multi-task parallel operation of a plurality of automatic workpiece transport vehicles can be realized, so that the workpiece heat treatment production efficiency is improved; in addition, the automatic workpiece transport vehicle with faults can be replaced and maintained in time, the maintenance difficulty of the workpiece transfer system is reduced, and the stable operation of the automatic workpiece heat treatment production line is ensured. In addition, in order to improve the production efficiency of the workpieces, the automatic production line for workpiece heat treatment can comprise more than two sets of workpiece heating systems, and the more than two sets of workpiece heating systems can be used for executing subsequent process operations by using the workpiece automatic transport vehicle to share the plurality of process tanks.

In more detail, in order to facilitate the automatic workpiece transporting vehicle 3 to collect the workpiece heated and quenched by the workpiece heating system, as shown in fig. 2, the plurality of process tanks include: a quenching tank 41; the quenching tank 41 includes: a quenching tank 411, a workpiece lifting device 412 and a workpiece extraction tank 413; wherein the quenching tank 411 is arranged at the discharge end of the heating furnace body 2, the workpiece lifting device 412 is arranged above the quenching tank 411, the workpiece extracting tank 413 is combined at one side of the quenching tank 411 far away from the discharge end and communicated with the quenching tank 411, and an opening is arranged above the workpiece extracting tank 413 so that the workpiece automatic transport vehicle 3 can collect the workpiece 10 on the workpiece extracting tank 413. The workpiece lifting device 412 places the heated workpiece 10 conveyed out of the discharging end in the quenching tank 411 for quenching operation, and after the quenching operation is finished, the workpiece lifting device 412 transfers the workpiece 10 from the quenching tank 411 to the workpiece extracting tank 413, and the automatic workpiece transport vehicle 3 takes out the workpiece 10 from the workpiece extracting tank 413. Therefore, the continuous automatic operation that the heated workpieces 10 are taken out from the discharging end, quenched and collected by the automatic workpiece transport vehicle 3 can be realized, and the double-task synchronous operation that the workpieces 10 are quenched and the workpieces 10 are collected by the automatic workpiece transport vehicle 3 can be realized, namely two workpieces 10 are in an operating state in the quenching tank 41, so that the heat treatment efficiency of the workpieces is further improved. Further, the workpiece lifting device 412 includes: the heat insulation shell 4121, the lifting driving motor 4122, the lifting frame 4123, the bearing plate 4124, the first transmission part 4125 and the first transmission driving motor 4126, wherein the heat insulation shell 4121 is covered and fixed above the quenching tank 411 and combined with the outer side of the discharge end of the workpiece heating system, one side of the adjacent discharge end of the heat insulation shell 4121 is provided with a feed inlet so as to communicate the inside of the heat insulation shell 4121 with the discharge end, the lifting driving motor 4122 and the first transmission driving motor 4126 are both arranged outside the heat insulation shell 4121, the lifting frame 4123 penetrates through the top of the heat insulation shell 4121, the lower end of the lifting frame 4121 is connected and fixed with the bearing plate 4124, the first transmission part 4125 is arranged at the bottom of the bearing plate 4124, the lifting driving motor 4122 drives the lifting frame 4123 to lift up and down, and the first transmission driving motor 4126 drives the first transmission; the workpiece retrieving groove 413 further comprises a second transmission driving motor (not shown), a second transmission member 4131 driven by the second transmission driving motor is disposed at the bottom of the workpiece retrieving groove, the second transmission member 4131 receives the workpiece 10 transmitted by the first transmission member 4125, wherein the first transmission member 4125 and the second transmission member 4131 are both formed by a plurality of roller bars and can be driven by the first transmission driving motor 4126 and the second transmission driving motor respectively to rotate, and a positioning device (not shown) electrically connected to the first transmission driving motor and the second transmission driving motor is further disposed at the first transmission member 4125 and the second transmission member 4131 to accurately position the workpiece. Therefore, the heated workpiece can be smoothly conveyed to the bearing plate from the discharge end, and can be smoothly conveyed to the workpiece extracting groove body from the bearing plate after quenching, and the workpiece is prevented from being influenced by the external environment temperature in the quenching operation.

As shown in fig. 3 and 4, the automatic workpiece transporting vehicle 3 in the present embodiment runs on a process lane between process tanks in the automatic workpiece heat treatment production line 1 to perform subsequent process operations on the workpiece heated by the heating furnace body, such as quenching, isothermal treatment, cleaning, unloading, and the like. In order to ensure the safety of the traveling route of the automatic workpiece transport vehicle, the process lane can be provided with upward convex edges at two sides for preventing wheels from going out of bounds. The process tank body related to in the technical scheme comprises a quenching tank, an isothermal tank, a cleaning tank and other process operation tank bodies, and also comprises a tank body for loading and taking workpieces and a tank body for unloading the workpieces, wherein the notch part of the process tank body is positioned on a roadbed surface of an operation area of the automatic workpiece transport vehicle, the tank body part is positioned below the roadbed surface, and the automatic workpiece transport vehicle moves right above the process tank body during operation so as to collect or place the workpieces. This automatic workpiece transport cart 3 includes: a vehicle body 31, a traveling device, a lifting device, a guide device 32, and a control device 33; wherein, the bottom of the vehicle body 31 is provided with a workpiece inlet and outlet (not marked in the figure) which penetrates through the inside and outside of the vehicle body 31; the walking device comprises a plurality of wheels 51 and a driving motor, wherein the wheels 51 are symmetrically distributed around a workpiece inlet and a workpiece outlet at the bottom of the vehicle body 31, and the driving motor is arranged on the vehicle body and can drive the wheels 51 to move and turn; the lifting device comprises a lifting frame 6 and a lifting drive, wherein the lifting frame 6 is arranged in the vehicle body 31, the lifting drive is arranged on the vehicle body 31 and can drive the lifting frame 6 to lift up and down, so that the lifting frame 6 can place a workpiece in the process tank or take the workpiece out of the process tank and retain the workpiece in the vehicle body; the guiding device 32 and the control device 33 are disposed on the vehicle body 31 and electrically connected to each other; the control device 33 is electrically connected to the driving motor and the lifting drive. Therefore, the automatic workpiece transport vehicle 3 can be used as an independent operation transfer unit for carrying the heated workpieces, so that the processing and transfer operation of the workpieces can be carried out among the process tanks of the heat treatment production line.

In the embodiment, the vehicle body 31 is rectangular and is composed of a plurality of steel frame rods (not shown) and a plurality of heat-insulating inner liner plates (not shown), wherein the ends of the steel frame rods are connected to form long sides and short sides of the vehicle body 31, the heat-insulating inner liner plates are installed and fixed between the long sides and the short sides of the vehicle body 31 to form a surface of the rectangular vehicle body, and the workpiece inlet and outlet are opened on the heat-insulating inner liner plates at the bottom of the vehicle body 31, so that the degree of heat exchange between the inside and the outside of the vehicle body 31 can be reduced, the temperature of the workpiece in the vehicle body 31 during the transfer process is ensured, and the quality of the subsequent processing of the workpiece is ensured. In order to further simplify the structure of the vehicle body 31 and reduce the manufacturing cost, the bottom of the vehicle body 31 may be directly formed as a work entrance penetrating the inside and outside of the vehicle body 31 without attaching and fixing a heat insulating inner panel to the bottom of the vehicle body 31. The inner side and the outer side of the heat insulation inner container plate can also be provided with metal plate bodies (not marked in the figure), and the metal plate bodies are fixed on the steel frame rods, so that medium steam emitted from the workpiece after the working procedure operation can be effectively prevented from permeating to the outside of the vehicle body 31. In this embodiment, the steel frame rod may be a light-weight steel frame rod, the heat-insulating liner plate may be an asbestos plate, and the metal plate may be a stainless steel plate.

In this embodiment, the lifting drive is a lifting motor, but the present technical solution is not limited thereto, and the lifting drive may also be a hydraulic or pneumatic cylinder, and the lifting frame is driven to lift by driving the cylinder to extend and retract. As shown in fig. 3 and 4, in the embodiment, the lifting motor 66 is taken as an example for illustration, in order to cooperate with the operation of the lifting motor 66, the lifting frame 6 includes a beam frame 61, four suspension arms 62, two suspension rods 63 and two lifting toothed bars 64, wherein the beam frame 61 is a rectangular frame, the four suspension arms 62 are respectively and vertically fixed below two opposite frame sides of the beam frame 61, the two suspension arms 62 of each frame side are respectively and correspondingly arranged at the same interval, the two suspension rods 63 are respectively and transversely fixed between the two suspension arms 62 of each frame side, one side of each of the two lifting toothed bars 64 is provided with a toothed part, the two lifting toothed bars 64 are vertically arranged on the upper part of the vehicle body 31, namely on the top of the vehicle body 31 formed by two layers of metal plates and a heat insulation inner container plate clamped therein, the lower end parts of the two lifting toothed bars 64 are symmetrically fixed on two opposite frame sides of the beam frame side of the beam frame 61, the upper end of the car body 31 extends out of the upper part of the car body 31, and two guide seats 65 guiding the lifting rack 64 to move up and down are arranged at the position where the two lifting racks 64 penetrate out on the upper part of the car body 31, the guide seats 65 are bases with vertical sliding grooves, the bases are fixed on the top of the car body 31, the lifting racks 64 penetrate through the vertical sliding grooves, teeth of the lifting racks 64 face the outside of the vertical sliding grooves, the lifting motor 66 is fixed on the upper part of the car body 31, output long shafts of the lifting motor 66 are perpendicular to the two lifting racks 64, and two gears (not shown) are sleeved on the lifting racks and meshed with the teeth of the two lifting racks 64 at the vertical sliding grooves of the two bases, so that the two lifting racks 64 can be driven to move up and down smoothly in the vertical sliding grooves of the two guide seats 65 through the rotation of the output long shafts of the lifting motor 66, and. In addition, in order to enhance the stability of the rotation of the output long shaft of the lifting motor, a fixed bearing (not shown) may be further sleeved at the end of the output long shaft of the lifting motor, and the fixed bearing is fixed at the top of the vehicle body. In addition, in order to ensure the stability of the lifting frame in the vertical lifting process, two vertical guide rail grooves can be correspondingly arranged on two opposite side surfaces in the vehicle body, and corresponding guide devices are arranged on the frame edges of the adjacent guide rail grooves of the beam frame, and are embedded in the guide rail grooves through the guide devices, so that the stability of the lifting frame in the vertical lifting process is ensured in an auxiliary manner.

In this embodiment, the driving motor includes two traveling motors and two steering motors electrically connected to the control device 33, the number of the wheels 51 is four, and the wheels are symmetrically distributed around the workpiece entrance and exit at the bottom of the vehicle body 31, wherein the two wheels 51 on one diagonal are driving wheels and are respectively provided with one traveling motor and one steering motor, the traveling motor can drive the driving wheels to travel, and the steering motors can drive the driving wheels to change directions; the two wheels 51 on the other diagonal are driven universal load-bearing wheels. The structure of the walking motor and the steering motor for driving the driving wheel to advance and turn is the prior art, one of the structures is shown in fig. 5, the steering motor 53 is fixedly arranged at the bottom of the vehicle body and is positioned beside the wheel mounting position, the wheel mounting position is provided with a mounting hole, a bearing is sleeved on the mounting hole, the driving wheel is provided with a steering shaft, a steering fluted disc and a wheel body from top to bottom, the steering shaft penetrates through the bearing and enables the steering fluted disc to be positioned outside the bearing, the steering motor 53 can drive the driving wheel to turn by meshing of a fluted disc at the output end of the steering motor 53 and the steering fluted disc of the driving wheel, and the output shaft of the walking motor 52 can be; as shown in fig. 6, another structure is shown, the arrangement of the steering motor 53 is the same as the above structure, the walking motor 52 is arranged in the installation cavity extending into the vehicle body from the installation hole, the walking motor 52 is meshed with the gear teeth at one end of the transmission shaft through the gear teeth at the output end, the gear teeth at the other end of the transmission shaft are meshed with the gear teeth at the end part of the driving wheel axle, so that the walking motor 52 arranged in the installation cavity is not influenced by the external environment, and the driving wheel structure is more compact. Therefore, the control device can realize the advancing or retreating and flexible steering of the two driving wheels on the same diagonal line, and meanwhile, the two driven universal bearing wheels on the other diagonal line can move or steer along with the driving wheels and can bear the weight of the vehicle body and the workpiece, so that the automatic workpiece transport vehicle can accurately and flexibly move among the processes of the heat treatment production line.

As another embodiment of the present technical solution, as shown in fig. 3, 4 and 7, the automatic workpiece transporting vehicle 3 further includes a liquid receiving device, which includes two L-shaped guide rails 7, two guide chains 75, a furling motor 76 and a liquid receiving tray 8; wherein the horizontal sections 71 of the two L-shaped guide rails 7 are symmetrically disposed at the outer side of the bottom of the vehicle body 31 and located at two sides of the workpiece inlet/outlet, the vertical sections 72 of the two L-shaped guide rails 7 are formed by extending the end portions of the horizontal sections 71 and upward and located at one side of the vehicle body 31, the joint portion 73 of the horizontal sections 71 and the vertical sections 72 is in a shape of a circular horn, the horizontal sections 71, the vertical sections 72 and the joint portion 73 of the L-shaped guide rails 7 have guide grooves 74 integrally communicated with each other, the guide grooves 74 of the two L-shaped guide rails 7 are oppositely disposed and have notches (not shown) facing the vehicle body 31 at the joint portion 73, the two guide chains 75 are inserted into the two guide grooves 74, the length of the guide chains 75 is smaller than the length of the guide grooves 74, the furling motor 76 is fixedly disposed at the outer side of the vehicle body 31 and adjacent to the joint portion 73 and electrically connected to the control device 33, two sprockets, the two chain wheels are meshed with guide chains 75 in the guide grooves 74 through notches on the combining parts 73 of the two L-shaped guide rails 7, and a liquid receiving disc 8 is arranged between the two guide chains 75 in the area below the workpiece inlet and outlet. Accordingly, the retraction motor 76 drives the two chain wheels to rotate forward or reversely, so as to drive the two guide chains 75 to displace in the guide grooves 74 of the two L-shaped guide rails 7, thereby controlling the liquid receiving disc to be positioned below or moved away from the workpiece inlet and outlet. In addition, in order to enhance the stability of the rotation of the output long shaft of the furling motor, a fixed bearing (not shown) can be sleeved at the end part of the output long shaft of the furling motor, and the fixed bearing is fixed on the vehicle body. In addition, in order to make the guide chain move more smoothly in the guide groove, a spring element (not shown) can be arranged at the end part in the guide groove of the vertical section of the L-shaped guide rail to connect the end part of the guide chain, so as to assist the take-up motor to output the chain wheel on the long shaft and restrain the guide chain from moving in the guide groove. The arrangement of the liquid receiving device can effectively prevent the medium (such as quenching salt, quenching oil or cleaning liquid) adhered to the workpiece in the vehicle body from dropping on the road surface of the passage between the working procedures after the workpiece is subjected to certain working procedure operations (such as quenching or cleaning).

More specifically, the liquid receiving plate can be made of a deformable thin metal plate, such as a snowflake board, and the manner adopted in this embodiment is that, as shown in fig. 7, the liquid receiving plate 8 is formed by splicing two end liquid receiving jointed plates 81, at least one middle liquid receiving jointed plate 82 and a plurality of through rods 83, and the end liquid receiving jointed plates 81 and the middle liquid receiving jointed plates 82 are both rectangular; a first turned edge 84 with a circular arc-shaped cross section and an upward opening is formed at the edge of the long edge of the adjacent joint part of the middle liquid-receiving jointed plate 82, and a second turned edge 85 with a circular arc-shaped cross section and a downward opening is formed at the edge of the long edge far away from the joint part; the end liquid-receiving jointed boards 81 at the adjacent joint parts are provided with upward flanges 86 towards the long edges of the joint parts, and the edges of the long edges far away from the joint parts are provided with second turned edges 85; the edge of the long edge of the liquid receiving jointed board 81 at the end far away from the joint part and facing the joint part is formed with a first turned edge 84, and the edge of the long edge far away from the joint part is formed with an upward flange 86; the short edge of the end liquid-receiving jointed board 81 and the middle liquid-receiving jointed board 82 are both formed with an upward flange 86; the flanges 86 formed on the edges of the long sides and the short sides of the end liquid-receiving jointed boards 81 and the flanges 86 formed on the edges of the short sides of the middle liquid-receiving jointed boards 82 form liquid-receiving spaces together; the liquid receiving plate 81 at the end of the adjacent joint part, at least one middle liquid receiving plate 82 and the liquid receiving plate 81 at the end far from the joint part are mutually sleeved by a first turned edge 84 and a second turned edge 85, and a penetrating rod 83 penetrates through the sleeved part to form the liquid receiving plate 8, and two ends of the penetrating rods 83 are respectively fixed at the chain links of the two guide chains. Therefore, the liquid receiving disc can move along with the displacement of the two guide chains, and can deform at the joint part of the L-shaped guide rail without liquid leakage. In addition, the plate bodies of the end liquid-receiving jointed plate and the middle liquid-receiving jointed plate can be slightly inclined downwards (not shown) from the adjacent joint parts to the direction far away from the joint parts, so that the dripping liquid is collected in each plate body and is not easy to flow into the joint of the first turned edge and the second turned edge; the liquid receiving jointed board at the end part far away from the joint part is also provided with an inclined board surface (not shown) which is concave downwards towards the middle part and a liquid collecting box 87 which is arranged at the lower side surface, and the bottom of the inclined board surface is provided with a leak (not shown) which is communicated with the inside of the liquid collecting box so as to be convenient for collecting the liquid in the liquid receiving plate.

In this embodiment, the heated workpiece may be carried by any carrier having a suspension member, and the carrier may be suspended from the suspension member by the suspension member. In order to facilitate the subsequent operation of the heated workpiece, as shown in fig. 8, in another embodiment of the present disclosure, the automatic workpiece transporting cart further includes: the material carrying basket 9 comprises a plurality of groups of ㄩ -shaped steel plates 91, heat insulation laminates 92 and at least four handles 93, the plurality of groups of ㄩ -shaped steel plates 91 are fixedly arranged on the lower side surfaces of the heat insulation laminates 92 side by side at the same intervals, the at least four handles 93 are divided into two groups and are vertically and fixedly arranged on the upper side surfaces of the heat insulation laminates 92 corresponding to the two suspension rods, hook portions 931 are arranged at the upper ends of the handles 93, and the workpieces 10 are placed in cavities formed by the groups of ㄩ -shaped steel plates 91 and the heat insulation laminates 92 in a surrounding mode. When the automatic workpiece transporting vehicle collects the quenched workpieces, as shown in fig. 2, the loading basket 9 is lowered by the lifting frame and placed on the second conveying part 4131 through the workpiece entrance/exit, and at this time, the ㄩ -shaped steel plates 91 of the loading basket 9 are respectively located at the intervals between the plurality of roller bars, so that the workpieces 10 can be conveyed by the plurality of roller bars and directly placed in the cavity enclosed by the ㄩ -shaped steel plates 91 and the heat-insulating laminate 92. The structure of the material carrying basket is convenient for receiving the workpiece conveyed by the second conveying component, the workpiece can be directly placed into the material carrying basket, the workpiece can be uniformly placed in a process medium (cleaning liquid and the like) during process operation, and the heat insulation and preservation laminate can effectively prevent the interference of the external environment temperature during process operation, so that the processing quality of the workpiece is ensured.

In this technical scheme, this guider can be the laser navigator, thereby this central control system passes through laser beam guide laser navigator can control work piece automatic transport vehicle very accurately and advance. The control device can be provided with a wireless communication module, and the central control system controls the automatic workpiece transport vehicle to place or take out the workpiece in the process tank body through data exchange with the wireless communication module, so that the central control system can control the operation of the automatic workpiece transport vehicle in real time without being blocked and interfered by facilities in a site. In practical application, a plurality of automatic workpiece transport vehicles are usually operated simultaneously in a heat treatment production line, and in order to increase the operation safety factor of the whole system, in another embodiment of the technical scheme, a safety collision avoidance system (not shown in the figure) electrically connected with the control device is further installed on the vehicle body, and collision between the automatic workpiece transport vehicles, or between the automatic workpiece transport vehicles and other equipment facilities, or between the automatic workpiece transport vehicles and operators can be effectively avoided through signal feedback of the safety collision avoidance system. The automatic workpiece transport vehicle can adopt a wired power supply mode and also can adopt a mode of loading a rechargeable storage battery for supplying power. In addition, in the technical scheme, the quenching medium in the quenching tank can be quenching salt, an intensity meter (not shown in the figure) can be arranged in the quenching tank, and the water content in the molten salt is accurately measured on line through the intensity meter, so that the water supplement amount is automatically controlled to reach the stable cooling speed required by the salt solution to meet the operation requirement; and a salt water concentration controller (not shown) can be adopted in the cleaning tank to automatically control the concentration change of the cleaning tank caused by salt brought by the workpiece, the concentrated salt-containing tank water is used as the water supplementing of the quenching tank molten salt for recycling, the redundant salt water can be sent to a salt evaporator (not shown), and the distilled salt crystals are sent to a salt tank for recycling so as to realize zero emission of salt.

As shown in fig. 9 to 11, in the present technical solution, when the automatic workpiece transport cart 3 is operated, the workpiece 10 is first stored in the cart body 31, and then the automatic workpiece transport cart is guided by the guide device 32 to move to a position above the process tank 4, the lifting frame 6 is driven by the lifting motor 66 to place the workpiece 10 in the process tank 4 for the operation of the relevant process, at this time, the automatic workpiece transport cart 3 not carrying the workpiece can perform the operation of taking out the workpiece 10 from another process tank 4, after the operation of the process is completed, the automatic workpiece transport cart 3 moves to a position above the process tank 4, the lifting frame 6 is driven by the lifting motor 66 to lift and withdraw the workpiece 10 into the cart body 31, and then the automatic workpiece transport cart 3 moves to the next process to be performed to repeat the above operations.

In this technical solution, as shown in fig. 1, the automatic production line 1 for workpiece heat treatment may further include a workpiece pressure quenching system 11 disposed at a discharge end of the workpiece heating system, and the workpiece pressure quenching system 11 may include: the quenching transfer vehicle 111, the quenching press 112, the oil cleaning machine 113 after pressure quenching and the pressure quenching workpiece return table 114, and the side wall of the heat insulation shell of the quenching tank can be provided with a discharge hole with a closed door in a matching way. The workpiece lifting device of the quenching tank receives the workpiece from the discharge end of the workpiece heating system, then the workpiece is descended for quenching operation (or the descending quenching operation is not needed), then the workpiece is ascended to the original position and the side wall closing door is opened, the workpiece is received by the pressure quenching transfer vehicle 111 and transferred to the quenching press 112 for pressure quenching operation, then the pressure quenching transfer vehicle 111 transfers the pressure quenched workpiece to the pressure quenched oil cleaning machine 113 for cleaning operation, then the workpiece is transferred to the pressure quenched workpiece returning platform 114, and the workpiece is collected by the workpiece automatic transport vehicle 3 to execute the subsequent process operation. The position relation of each device in the workpiece pressure quenching system is not limited in the technical scheme.

The automatic production line for workpiece heat treatment in the technical scheme can simplify the structure of the workpiece transfer system, reduce the occupation of the workpiece transfer operation space, realize flexible adjustment and expansion of related procedures, realize multi-task parallel operation and improve the production efficiency of workpiece heat treatment; in addition, the automatic workpiece transport vehicle with faults can be replaced and maintained in time, maintenance difficulty is reduced, and stable operation of a heat treatment production line is ensured.

The above are only preferred embodiments of the present disclosure, and are not intended to limit the scope of the present disclosure, and other equivalent changes made by applying the patent concepts of the present disclosure should fall within the scope of the present disclosure.

Claims (10)

1. The utility model provides a work piece automatic transportation car for carry out automatic transportation and operation to the work piece after being heated between each process cell body of thermal treatment production line, its characterized in that includes: the device comprises a vehicle body, a walking device, a lifting device, a guide device and a control device; the bottom of the vehicle body is provided with a workpiece inlet and a workpiece outlet which penetrate through the inside and the outside of the vehicle body; the walking device comprises a plurality of wheels and a driving motor, the wheels are symmetrically distributed around a workpiece inlet and a workpiece outlet at the bottom of the vehicle body, and the driving motor is arranged on the vehicle body and drives the wheels to move and turn; the lifting device comprises a lifting frame and a lifting drive, the lifting frame is arranged in the vehicle body, the lifting drive is arranged on the vehicle body and drives the lifting frame to lift up and down, so that the lifting frame can place the workpiece in the process tank body or take out the workpiece from the process tank body and place the workpiece in the vehicle body; the guide device and the control device are arranged on the vehicle body and are electrically connected with each other; the control device is electrically connected with the driving motor and the lifting drive.

2. The automatic workpiece transport vehicle according to claim 1, further comprising a liquid receiving device, wherein the liquid receiving device comprises two L-shaped guide rails, two guide chains, a furling motor and a liquid receiving disc; the horizontal sections of the two L-shaped guide rails are symmetrically arranged on the outer side of the bottom of the vehicle body and positioned on two sides of the inlet and the outlet of the workpiece, the vertical sections of the two L-shaped guide rails extend from the end parts of the horizontal sections and are upwards formed and positioned on one side of the vehicle body, the joint parts of the horizontal sections and the vertical sections are in a round angle shape, the horizontal sections, the vertical sections and the joint parts of the L-shaped guide rails are provided with guide grooves which are integrally communicated, the guide grooves of the two L-shaped guide rails are oppositely arranged, notches facing the vehicle body are formed in the joint parts, the two guide chains are arranged in the two guide grooves in a penetrating manner, the length of each guide chain is smaller than that of each guide groove, the furling motor is fixedly arranged on the outer side of the vehicle body and is adjacent to the joint parts and is electrically connected with the control device, two chain wheels are sleeved on the output long shaft of the furling motor, and the liquid receiving disc is arranged between the two guide chains in the area below the workpiece inlet and outlet.

3. The automatic transport vehicle for workpieces as claimed in claim 2, wherein the liquid receiving tray is formed by splicing two end liquid receiving jointed boards, at least one middle liquid receiving jointed board and a plurality of through rods, and the end liquid receiving jointed boards and the middle liquid receiving jointed boards are rectangular; the long edge of the adjacent joint part of the middle liquid-receiving jointed plate is formed with a first turned edge with a circular arc-shaped section and an upward opening, and the long edge of the joint part away from the first turned edge is formed with a second turned edge with a circular arc-shaped section and a downward opening; the edge of the long edge of the end liquid receiving jointed board, facing the joint part, of the adjacent joint part is provided with an upward flange, and the edge of the long edge, far away from the joint part, of the end liquid receiving jointed board is provided with a second turned edge; the first flange is formed on the edge of the long edge, facing the joint part, of the end liquid receiving jointed board far away from the joint part, and an upward flange is formed on the edge of the long edge, far away from the joint part, of the end liquid receiving jointed board; the short edge edges of the end liquid-receiving jointed boards and the middle liquid-receiving jointed boards are both provided with upward flanges; the flanges formed at the edges of the long sides and the short sides of the end liquid-receiving jointed boards and the flanges formed at the edges of the short sides of the middle liquid-receiving jointed boards form liquid-receiving spaces together; the liquid receiving plates at the end parts of the adjacent joint parts, the liquid receiving plates at the at least one middle part and the liquid receiving plates at the end parts far away from the joint parts are mutually sleeved through the first turned edges and the second turned edges, the penetrating rods penetrate through the sleeved parts to form the liquid receiving discs, and two ends of the penetrating rods are respectively fixed at chain links of the two guide chains.

4. The automatic workpiece conveying vehicle as claimed in claim 3, wherein the liquid receiving panels at the ends far away from the joint part are provided with inclined panel surfaces which are concave downwards towards the middle part and liquid collecting boxes which are arranged on the lower side surfaces, and the bottoms of the inclined panel surfaces are provided with leakage openings communicated with the interiors of the liquid collecting boxes.

5. The automatic workpiece conveying vehicle according to claim 1, wherein the vehicle body is rectangular and is composed of a plurality of steel frame rods and a plurality of heat-insulating inner container plates, the ends of the steel frame rods are connected with each other to form long sides and short sides of the vehicle body, the heat-insulating inner container plates are fixedly installed between the long sides and the short sides of the vehicle body to form a surface of the rectangular vehicle body, and the workpiece inlet and outlet are formed in the heat-insulating inner container plates at the bottom of the vehicle body.

6. The automatic workpiece transport vehicle as claimed in claim 5, wherein the bottom of the vehicle body is not provided with a fixed heat insulation liner plate, and the bottom of the vehicle body directly forms the workpiece inlet and outlet penetrating the inside and outside of the vehicle body.

7. The automatic workpiece conveying vehicle as claimed in claim 5 or 6, wherein metal plate bodies are mounted on the inner side and the outer side of the heat-insulating liner plate, and the metal plate bodies are fixed on the steel frame rods.

8. The automatic workpiece transport vehicle according to claim 1, wherein the lifting drive is a lifting motor, the lifting frame comprises a beam frame, four suspension arms, two suspension rods and two lifting rack bars, the beam frame is a rectangular frame, the four suspension arms are respectively and vertically fixed below two opposite frame sides of the beam frame, the two suspension arms of each frame side have the same interval and are correspondingly arranged, the two suspension rods are respectively and horizontally fixed between the two suspension arms of each frame side, one side of each lifting rack bar is provided with a tooth part, the two lifting rack bars are vertically penetrated through the upper part of the vehicle body, the lower end parts of the two lifting rack bars are symmetrically and fixedly connected to the two opposite frame sides of the beam frame, the upper end parts of the two lifting rack bars penetrate out of the upper part of the vehicle body, and two guide seats for guiding the lifting rack bars to move up and down are arranged at the positions where the two lifting rack bars penetrate out, the lifting motor is fixed on the upper part of the vehicle body, the output long shaft of the lifting motor is perpendicular to the two lifting toothed bars, and the two gears are sleeved with the two lifting toothed bars and meshed with the tooth parts of the two lifting toothed bars at the two guide seats.

9. The automatic workpiece transport cart of claim 8, further comprising: carry the charging basket, carry the charging basket and constitute by array ㄩ shape steel sheet, thermal-insulated heat preservation plywood and four at least handles, array ㄩ shape steel sheet separates the same distance and sets firmly side by side in thermal-insulated heat preservation plywood downside, four at least handles divide into two sets ofly and correspond two jib and set firmly perpendicularly in the thermal-insulated heat preservation plywood to the side, the handle upper end has colludes the portion, the work piece is placed in array ㄩ shape steel sheet encloses synthetic cavity with thermal-insulated heat preservation plywood.

10. The automatic workpiece transport vehicle according to claim 1, wherein the driving motor comprises two traveling motors and two steering motors electrically connected with the control device, the number of the wheels is four, and the wheels are symmetrically distributed around the workpiece inlet and outlet at the bottom of the vehicle body, wherein two wheels on one diagonal line are driving wheels and are respectively provided with one traveling motor and one steering motor, the traveling motors drive the driving wheels to travel, and the steering motors drive the driving wheels to change directions; and two wheels on the other diagonal line are driven universal bearing wheels.

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