Large workpiece transfer device

Abstract

A large workpiece transfer device comprises a gantry support, a transverse moving mechanism, a longitudinal moving mechanism and a clamping jaw assembly, the clamping jaw assembly is composed of a bearing frame, four I-shaped channel steel rails, a clamping jaw, a rack, a clamping jaw motor and a driving shaft, the bearing frame is in a square shape, and the upper portion of the bearing frame is connected with the longitudinal moving mechanism; the four I-shaped channel steel rails are fixedly arranged on the lower portion of the bearing frame along the diagonal lines of the bearing frame respectively, rail grooves are formed in the two sides of each I-shaped channel steel rail, and the clamping jaws are embedded in the rail grooves through the rollers. The four racks are divided into two groups, are respectively arranged at the upper parts of the two clamping jaws which relatively move along the same linear direction and the other linear direction and are respectively positioned above and below the rollers, the clamping jaw motor is arranged at the center of the upper part of the bearing frame, the driving shaft is arranged at the center of the bearing frame in a penetrating manner, and the upper end part of the driving shaft is connected with the driving end of the clamping jaw motor; the driving shaft is fixedly sleeved with the two gears and engaged with the two sets of racks correspondingly. Therefore, the four clamping jaws can grab and rectify the deviation of the large workpiece at the same time.

Description

Technical Field

[0001] The utility model relates to a workpiece transfer device, in particular to a large workpiece transfer device which is suitable for grasping and transferring large ferrule-type workpieces. Background Art

[0002] With the rapid development of my country's equipment manufacturing industry, the demand for heat treatment of large bearing workpieces has come one after another. The original light manipulator workpiece transfer device has weak correction ability for large workpieces, especially large ring workpieces, limited load capacity, low positioning accuracy and other shortcomings. It has gradually become difficult to meet the transfer needs of large workpieces in process operations such as press quenching. Therefore, this field urgently needs a large workpiece transfer device with strong correction ability, high load capacity and positioning accuracy to meet the needs of the development of the equipment manufacturing industry. Utility Model Content

[0003] The main technical problem to be solved by this technical solution is how to provide a large workpiece transfer device suitable for large workpieces, especially large ring-type workpieces, with strong correction capabilities.

[0004] In order to solve the above-mentioned main technical problems, the present technical scheme provides a large-scale workpiece transfer device, which includes: a gantry support, a transverse moving mechanism, a longitudinal moving mechanism and a clamping jaw assembly, wherein the transverse moving mechanism is installed on the upper part of the gantry support, the longitudinal moving mechanism is installed on the transverse moving mechanism, and the clamping jaw assembly is installed on the lower part of the longitudinal moving mechanism, wherein the clamping jaw assembly is mainly composed of a supporting frame, four I-shaped channel steel rails, four clamping jaws, four racks, a clamping jaw motor and a driving shaft, the supporting frame is horizontally arranged and its transverse cross-section is square, the upper part of the supporting frame is connected to the longitudinal moving mechanism, the four I-shaped channel steel rails are horizontally and respectively fixedly arranged on the lower part of the supporting frame along the diagonal of the supporting frame, and the outer ends of the four I-shaped channel steel rails are respectively located at the four corners of the supporting frame, and the inner ends of the four I-shaped channel steel rails are close to the center of the transverse cross-section of the supporting frame, Both sides of the steel track are provided with track grooves, and the four clamping jaws are respectively embedded in the track grooves of the four I-shaped steel tracks through rollers and are movably arranged at the lower part of the four I-shaped steel tracks. The four racks are horizontally arranged and divided into two groups, the two racks of one group are respectively arranged at the upper part of the two clamping jaws that move relatively along the same straight line direction and are located above the roller, and the two racks of the other group are respectively arranged at the upper part of the two clamping jaws that move relatively along another straight line direction and are located below the roller. The clamping jaw motor is installed at the upper center of the supporting frame with its driving end facing downward, the driving shaft is vertically and rotatably penetrated through the center of the supporting frame, and the upper end of the driving shaft is connected to the driving end of the clamping jaw motor, and two gears are fixedly sleeved on the driving shaft corresponding to the two groups of racks and are respectively meshed with the two groups of racks. The four clamping jaws are driven by the clamping jaw motor to move closer to or farther away from each other along the diagonal direction of the supporting frame. Accordingly, by movably embedding the rollers in the track grooves on both sides of the I-shaped steel track, the clamping jaws can offset the load generated by correcting the position of the workpiece when grasping the workpiece in the form of a simply supported beam, thereby improving the bearing strength of the clamping jaws; in addition, two sets of racks located at different heights are simultaneously transmitted by two gears fixedly mounted on the driving shaft at intervals, which can prevent interference between the racks during movement, and the four clamping jaws that move relatively along the diagonal of the square-shaped supporting frame have symmetrical moving paths and the same moving distances, so that correction operations can be performed when grasping large workpieces, especially large ring-type workpieces, to improve the correction capability of the workpiece.

[0005] As another implementation of the technical solution, the clamping jaw is composed of a mounting portion, a claw body and a claw head from top to bottom, wherein the mounting portion is composed of a horizontally arranged bottom plate, two vertically parallel guide plates arranged at intervals, and four rollers, the lower ends of the two guide plates are fixedly coupled to the two opposite ends of the bottom plate, the four rollers are divided into two groups and are respectively and spaced apart on the two opposite side surfaces of the two guide plates, the claw body is in the shape of a strip plate and is vertically arranged parallel to the guide plates, the upper end of the claw body is fixedly coupled to the lower part of the bottom plate, the claw head is fixedly coupled to the lower end of the claw body and the claw head extends horizontally for a distance in the direction of the extension line of the drive shaft, and the clamping jaw is movably arranged at the lower part of the I-channel steel rail by embedding the rollers on the two opposite side surfaces of the two guide plates in the two side grooves of the I-channel steel rail. Accordingly, the clamping claw can be stably and slidably embedded in the rail groove of the I-shaped steel rail, and the structure in which the claw head protrudes toward the driving shaft can support the bottom of the workpiece when grasping the workpiece to enhance the firmness of the grasping.

[0006] As another implementation of the technical solution, the two racks of one group are fixedly arranged with their tooth surfaces facing each other and their two ends far away from each other on the upper ends of two guide plates on the two jaws moving relatively in the same linear direction, so that the two ends of the two racks of one group that are close to each other are meshed with the two sides of the gear on the upper part of the driving shaft, and the two racks of the other group are also fixedly arranged with their tooth surfaces facing each other and their two ends far away from each other on the lower parts of the side edges on the non-same sides of the bottom plates of the two jaws moving relatively in another linear direction, so that the two ends of the two racks of the other group that are close to each other are meshed with the two sides of the gear on the lower part of the driving shaft. In this way, interference between the racks can be prevented during the process of being driven to move.

[0007] As another implementation of the technical solution, the gantry support is mainly composed of several bearing columns, two long beams and two short beams. The several bearing columns are divided into two groups, each group contains the same number of bearing columns that are spaced at the same interval and vertically arranged. The bearing columns of the two groups are fixedly arranged on the ground or the base along two parallel straight lines spaced at a distance. The two long beams are parallel and fixedly arranged on the upper ends of the bearing columns of the two groups, and the two short beams are fixedly connected between the two ends of the two long beams. Accordingly, the gantry support can have a strong structural strength and a large load-bearing capacity.

[0008] As another implementation of the present technical solution, the transverse movement mechanism is mainly composed of two guide rails, two long transverse racks, a transverse movement frame, four guide wheels, a transverse movement motor and a transverse drive shaft, wherein the two guide rails are horizontally arranged and fixedly arranged on the upper parts of the two long beams, respectively, the two long transverse racks are also horizontally arranged and fixedly arranged on the opposite side walls of the two long beams, respectively, the transverse movement frame is horizontally arranged and its transverse cross-section is rectangular and the four guide wheels are respectively installed at the four corners of its lower part, and a rectangular hollow installation opening is formed in the middle part of the transverse movement frame, and the transverse movement motor is installed on the transverse movement frame at On one side between the two guide rails, the transverse driving shaft is rotatably passed through two bearing parts on the one side of the transverse moving frame at both ends so that it is horizontal and perpendicular to the transverse long rack and is arranged between the two guide rails, and the middle part of the transverse driving shaft is drivingly connected with the driving end of the transverse moving motor, and the two ends of the transverse driving shaft are respectively fixed with gears, and the transverse moving frame is guided and moved on the two guide rails through four guide wheels installed at the four corners of its lower part, and the gears at the two ends of the transverse driving shaft are meshed with the two transverse long racks, and the transverse moving frame is driven by the transverse moving motor to move horizontally along the guide rails. Accordingly, the transverse moving mechanism can be moved smoothly on the two long beams of the gantry bracket.

[0009] As another implementation of the present technical solution, the longitudinal moving mechanism is mainly composed of two bearing plates, two longitudinal guide grooves, a longitudinal moving frame, two longitudinal guide rails, two longitudinal long racks, a longitudinal moving motor and a longitudinal driving shaft, wherein the two bearing plates are vertically and parallelly spaced opposite to each other and are respectively fixedly arranged on the inner sides of two opposite edges of the mounting opening between the two long beams, the two longitudinal guide grooves are vertically and opposite to each other with grooves and are respectively fixedly arranged on two opposite side walls of the two bearing plates, the longitudinal moving frame is composed of two main beams vertically and parallelly spaced apart and a number of auxiliary beams horizontally connected between the two main beams, the lower ends of the two main beams are connected to the upper part of the bearing frame, the two longitudinal guide rails are vertically and parallelly spaced apart and are respectively fixedly arranged on the inner sides of two opposite edges of the mounting opening between the two long beams, the two longitudinal guide grooves are vertically and opposite to each other with grooves and are respectively fixedly arranged on two opposite side walls of the two bearing plates, the longitudinal moving frame is composed of two main beams vertically and parallelly spaced apart and a number of auxiliary beams horizontally connected between the two main beams, the lower ends of the two main beams are connected to the upper part of the bearing frame, the two longitudinal guide rails are vertically The two main beams are fixedly arranged on the outer sides away from each other and are movably embedded in the two longitudinal guide grooves. The two longitudinal long racks are respectively fixedly arranged on the sides of the two main beams facing the same long beam in the vertical direction. The longitudinal moving motor is fixedly installed on the outer side of one of the bearing plates. The longitudinal driving shaft is horizontal and its two ends are rotatably arranged on the two opposite side walls of the two bearing plates through bearings and are adjacent to the longitudinal long racks. The fixed sleeves on the longitudinal driving shaft are provided with two gears and mesh with the two longitudinal long racks respectively. One end of the longitudinal driving shaft adjacent to the longitudinal moving motor passes through the bearing plate and is connected to the driving end of the longitudinal moving motor. The two main beams are driven by the longitudinal moving motor to drive the clamping jaw assembly to rise or fall. Accordingly, the longitudinal moving mechanism is changed from the single-arm structure commonly used in the existing moving device to a frame structure to increase its load-bearing capacity and support force. At the same time, the guide system of the longitudinal moving mechanism is changed from the matching structure of the composite roller and the forklift channel steel to a linear guide structure, so that its positioning accuracy is higher and the operation is more stable and reliable.

[0010] As another implementation of the present technical solution, the clamp assembly also includes: a heat-insulating structure reinforcement plate, which is horizontally fixedly coupled to the upper part of the load-bearing frame, the clamp motor is installed at the upper center of the heat-insulating structure reinforcement plate, the drive shaft is vertically and rotatably passed through the center of the heat-insulating structure reinforcement plate and its upper end is connected to the drive end of the clamp motor, and the lower ends of the two main beams have a joint and are connected to the upper part of the heat-insulating structure reinforcement plate through a number of floating connectors. Accordingly, the heat-insulating structure reinforcement plate can not only strengthen the structural strength of the clamp assembly itself, but also effectively isolate the high-temperature atmosphere below to prevent adverse effects on the drive device when grasping workpieces in process operations such as press quenching; in addition, the connection between the longitudinal moving mechanism and the clamp assembly with a floating connector can also increase the safety gap between the clamp and equipment such as a press during the falling process to prevent the impact caused by the rigid connection.

[0011] As another implementation of the present technical solution, the gripper motor, the lateral movement motor and the longitudinal movement motor are all matching structures of a servo motor and a reducer.

[0012] As another implementation of the technical solution, the large workpiece transfer device further includes: a travel control unit, which is electrically connected to the clamping motor, the lateral movement motor and the longitudinal movement motor, respectively. Accordingly, the automation level of the large workpiece transfer device can be improved.

[0013] As another implementation of the technical solution, a maintenance platform is provided on the outer side of the upper part of the gantry support, so as to facilitate maintenance and repair operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a side schematic diagram of the large workpiece transfer device of the utility model;

[0015] Figure 2 It is a top view schematic diagram of the large workpiece transfer device of the utility model;

[0016] Figure 3 It is a top perspective view of the clamping jaw assembly in the utility model;

[0017] Figure 4 It is a side perspective view of the clamping jaw assembly with the rack located above the roller in the utility model;

[0018] Figure 5 It is a side perspective view of the clamping jaw assembly with the rack located below the roller in the utility model;

[0019] Figure 6 It is a schematic diagram of the longitudinal movable frame in the present invention.

[0020] Explanation of symbols in the accompanying drawings: 1 gantry support; 11 load-bearing column; 12 long beam; 13 short beam; 2 transverse moving mechanism; 21 guide rail; 22 transverse long rack; 23 transverse moving frame; 231 mounting opening; 24 guide wheel; 25 transverse moving motor; 26 transverse driving shaft; 3 longitudinal moving mechanism; 31 load-bearing plate; 32 longitudinal guide groove; 33 longitudinal moving frame; 331 main beam; 3311 joint; 332 auxiliary beam; 34 longitudinal guide rail; 35 longitudinal long rack; 36 longitudinal moving motor; 37 longitudinal driving shaft; 38 reinforcing beam; 4 clamping jaw assembly; 41 load-bearing frame; 42 I-shaped channel steel track; 421 track groove; 43 clamping jaw; 431 bottom plate; 432 guide plate; 433 roller; 434 claw body; 435 claw head; 44 rack; 45 clamping jaw motor; 46 driving shaft; 47 gear; 48 insulation structure reinforcing plate; 5 maintenance platform; A workpiece. DETAILED DESCRIPTION

[0021] The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings. However, the accompanying drawings are only provided for reference and description and are not intended to limit the present invention.

[0022] In the context of this specification, any two or more embodiments of the present invention may be arbitrarily combined, and the technical solution thus formed belongs to part of the original disclosure of this specification and also falls within the protection scope of the present invention.

[0023] like Figure 1 and Figure 2 As shown, it is a schematic diagram of a specific embodiment of the large workpiece transfer device of the utility model. The large workpiece transfer device includes a gantry support 1, a lateral moving mechanism 2, a longitudinal moving mechanism 3 and a clamping jaw assembly 4. Among them, the lateral moving mechanism 2 is installed on the upper part of the gantry support 1, the longitudinal moving mechanism 3 is installed on the lateral moving mechanism 2, and the clamping jaw assembly 4 is installed on the lower part of the longitudinal moving mechanism 3. During operation, the lateral moving mechanism 2 and the longitudinal moving mechanism 3 respectively drive the clamping jaw assembly 4 to move horizontally and vertically to pick up, place and transfer the large workpiece A. A maintenance platform 5 can also be provided on the outer side of the upper part of the gantry support 1 to facilitate maintenance and maintenance operations.

[0024] Combination Figure 3 , Figure 4 and Figure 5 As shown, the clamp assembly 4 in the utility model is mainly composed of a load-bearing frame 41, four I-shaped channel steel rails 42, four clamps 43, four racks 44, a clamp motor 45 and a drive shaft 46. Among them, the load-bearing frame 41 is horizontally arranged and its transverse cross section is square. It can be composed of four identical beams, a plate body, or a combination of the above beams and plates. The utility model does not limit this. The upper part of the load-bearing frame 41 is connected to the longitudinal moving mechanism 3. The four I-shaped channel steel rails 42 are horizontally and fixedly arranged at the lower part of the load-bearing frame 41 along the diagonal of the load-bearing frame 41, and the outer ends of the four I-shaped channel steel rails 42 are respectively located at the four corners of the load-bearing frame 41, and the inner ends of the four I-shaped channel steel rails 42 are close to the center of the transverse cross section of the load-bearing frame 41. Both sides of the I-shaped channel steel rails 42 have rail grooves 421. The four clamping jaws 43 are respectively embedded in the track grooves 421 of the four I-shaped steel rails 42 through rollers 433 and are movably arranged at the bottom of the four I-shaped steel rails 42. The four racks 44 are all arranged horizontally and divided into two groups, and the two racks 44 of one group are respectively arranged at the upper part of the two clamping jaws 43 that move relatively along the same straight line direction (one of the diagonal directions) and are located above the rollers 433 (such as Figure 4 The other set of two racks 44 are respectively arranged on the upper part of the two clamping jaws 43 that move relatively along another straight line direction (another diagonal direction) and are located below the roller 433 (as shown in FIG. Figure 5). The clamping motor 45 is installed at the center of the upper part of the carrying frame 41 with its driving end facing downward. The driving shaft 46 is vertically and rotatably penetrates the center of the carrying frame 41 through a bearing (not shown in the figure), and the upper end of the driving shaft 46 is connected to the driving end of the clamping motor 45. Two gears 47 are fixedly sleeved on the driving shaft 46 corresponding to the two sets of racks 44 and mesh with the two sets of racks 44 respectively. The four clamping jaws 43 can be driven by the clamping motor 45 to move closer to or farther from each other along the diagonal direction of the carrying frame 41. Accordingly, the large workpiece transfer device of the utility model is movably embedded in the track groove 421 on both sides of the I-shaped channel steel track 42 through the roller 433, so that the clamping jaw 43 can offset the load generated by correcting the position of the workpiece A when grasping the large workpiece A in the form of a simply supported beam, thereby improving the bearing strength of the clamping jaw 43; in addition, the two gears 47 fixedly sleeved on the driving shaft 46 at intervals simultaneously transmit the two sets of racks 44 located at different heights, which can prevent the racks 44 from interfering with each other during movement, and the four clamping jaws 43 that move relative to each other along the diagonal of the square-shaped supporting frame 41 have symmetrical moving paths and the same moving distances. When grasping large workpieces A, especially large ring-type workpieces, the thrust of the moving clamping jaws 43 can be used to perform correction operations to improve the correction capability of workpiece A.

[0025] More specifically, the clamping jaw 43 is composed of a mounting portion, a claw body 434 and a claw head 435 from top to bottom. The mounting portion is composed of a bottom plate 431 arranged horizontally, two guide plates 432 arranged vertically and parallelly at intervals, and four rollers 433. The lower ends of the two guide plates 432 are fixedly coupled to two opposite ends of the bottom plate 431, respectively. The four rollers 433 are divided into two groups and are respectively spaced apart on two opposite sides of the two guide plates 432. The claw body 434 is in the shape of a strip plate and is arranged vertically parallel to the guide plates 432. The upper end of the claw body 434 is fixedly coupled to the lower part of the bottom plate 431. The claw head 435 is fixedly coupled to the lower end of the claw body 434 and the claw head 435 extends horizontally for a distance in the direction of the extension line of the drive shaft 46. By embedding the rollers 433 on the two opposite sides of the two guide plates 432 into the two side grooves 421 of the I-shaped steel track 42, the clamping jaws 43 are stably and slidably arranged at the lower part of the I-shaped steel track 42, and the structure of the claw head 435 protruding toward the drive shaft 46 can support the bottom of the workpiece A when grasping the workpiece A, thereby enhancing the firmness of the grasping.

[0026] Further, the two racks 44 of one group are fixedly arranged on the upper ends of two guide plates 432 on the non-same sides of the two clamping jaws 43 that move relatively along the same linear direction with their tooth surfaces facing each other and the two ends of the two racks 44 that are far away from each other, so that the two ends of the two racks 44 of one group that are close to each other are meshed on both sides of the gear 47 on the upper part of the driving shaft 46; the two racks 44 of the other group are also fixedly arranged on the lower parts of the non-same side edges of the bottom plates 431 of the two clamping jaws 43 that move relatively along the other linear direction with their tooth surfaces facing each other and the two ends of the two racks 44 that are far away from each other, so that the two ends of the two racks 44 of the other group are meshed on both sides of the gear 47 on the lower part of the driving shaft 46, thereby preventing the racks 44 from interfering with each other during the process of being driven to move. In addition, a fixing portion (not shown in the figure) fixedly combined with the racks 44 can be provided on the supporting frame 41 or the I-shaped channel steel rail 42 to strengthen the structural strength of the racks 44 and prevent them from being deformed during the meshing transmission process of the gears 47.

[0027] Combination Figure 1 and Figure 2 As shown, the gantry support 1 in this embodiment is mainly composed of a number of bearing columns 11, two long beams 12 and two short beams 13. Among them, the several bearing columns 11 are divided into two groups, each group contains a plurality of bearing columns 11 of the same number and spaced at the same interval and arranged vertically, and the plurality of bearing columns 11 of the two groups are fixedly arranged on the ground or the base along two parallel straight lines spaced at a distance. The two long beams 12 are parallel and fixedly arranged at the upper ends of the plurality of bearing columns 11 of the two groups, respectively. The two short beams 13 are fixedly connected between the two ends of the two long beams 12, respectively. In this way, the gantry support 1 has a stronger structural strength and a larger load-bearing capacity.

[0028] The transverse moving mechanism 2 in this embodiment is mainly composed of two guide rails 21, two transverse long racks 22, a transverse moving frame 23, four guide wheels 24, a transverse moving motor 25 and a transverse driving shaft 26. Among them, the two guide rails 21 are horizontally arranged and fixedly arranged on the upper part of the two long beams 12 respectively. The two transverse long racks 22 are also horizontally arranged and fixedly arranged on the opposite side walls of the two long beams 12 respectively. The transverse moving frame 23 is arranged horizontally and its transverse cross section is rectangular and the four guide wheels 24 are respectively installed at the four corners of its lower part, and a rectangular hollow installation opening 231 is formed in the middle of the transverse moving frame 23. The transverse moving frame 23 can be surrounded by four beams. The transverse moving motor 25 is installed on one side of the transverse moving frame 23 located between the two guide rails 21. The transverse drive shaft 26 is rotatably provided at both ends through two bearings (not shown) on one side of the transverse moving frame 23 so that it is horizontal and perpendicular to the transverse long rack 22 and is arranged between the two guide rails 21, and the middle part of the transverse drive shaft 26 is drivingly connected with the driving end of the transverse moving motor 25 (specifically, the driving connection can be achieved by the bevel gears (not shown) respectively fixedly sleeved on the driving end of the transverse moving motor and the middle part of the driving shaft being engaged with each other), and the two ends of the transverse drive shaft 26 are respectively fixedly provided with gears (not shown). The transverse moving frame 23 is guided and movable on the two guide rails 21 through four guide wheels 24 installed at the four corners of its lower part, and the gears at the two ends of the transverse drive shaft 26 are engaged with the two transverse long racks 22, and the transverse moving frame 23 is driven by the transverse moving motor 25 to move smoothly along the guide rails.

[0029] The longitudinal moving mechanism 3 in this embodiment is mainly composed of two bearing plates 31, two longitudinal guide grooves 32, a longitudinal moving frame 33, two longitudinal guide rails 34, two longitudinal long racks 35, a longitudinal moving motor 36 and a longitudinal driving shaft 37. The two bearing plates 31 are vertically and parallelly spaced opposite to each other and fixedly arranged on the inner sides of two opposite edges of the installation opening 231 between the two long beams 12, and a plurality of reinforcing beams 38 can be connected between the two bearing plates 31 to strengthen the structural strength of the longitudinal moving mechanism 3. The two longitudinal guide grooves 32 are vertically and fixedly arranged on the two opposite side walls of the two bearing plates 31 with the grooves opposite to each other. Figure 6As shown, the longitudinal moving frame 33 is composed of two main beams 331 arranged vertically and parallelly at intervals and a plurality of auxiliary beams 332 connected horizontally between the two main beams 331. The lower ends of the two main beams 331 are connected to the upper part of the supporting frame 41. The two longitudinal guide rails 34 are vertically fixedly arranged on the outer sides of the two main beams 331 away from each other and are movably embedded in the two longitudinal guide grooves 32. The two longitudinal long racks 35 are vertically fixedly arranged on the sides of the two main beams 331 facing the same long beam 12. The longitudinal moving motor 36 is fixedly installed on the outer side of one of the supporting plates 31. The longitudinal drive shaft 37 is horizontal and its two ends are rotatably arranged on the two opposite side walls of the two bearing plates 31 and adjacent to the longitudinal long racks 35 through bearings (not shown in the figure). The fixed sleeves on the longitudinal drive shaft 37 are provided with two gears (not shown in the figure) and mesh with the two longitudinal long racks 35 respectively. One end of the longitudinal drive shaft 37 adjacent to the longitudinal moving motor 36 passes through the bearing plate 31 and is connected to the driving end of the longitudinal moving motor 36. The two main beams 331 are driven by the longitudinal moving motor 36 to drive the clamping jaw assembly 4 to rise or fall, so that the longitudinal moving mechanism 3 can be changed from the single-arm structure commonly used in the existing moving device to a frame structure to increase its carrying capacity and support force. At the same time, the guide system of the longitudinal moving mechanism 3 is changed from the matching structure of the composite roller and the forklift channel steel to a linear guide structure, so that its positioning accuracy is higher and the operation is more stable and reliable.

[0030] Combination Figure 4 and Figure 5 As shown, the clamp assembly 4 in this embodiment may also include a heat insulation structure reinforcement plate 48, which is horizontally fixedly combined with the upper part of the load-bearing frame 41, the clamp motor 45 is installed at the upper center of the heat insulation structure reinforcement plate 48, the drive shaft 46 is vertically and rotatably penetrated through the center of the heat insulation structure reinforcement plate 48 and its upper end is connected to the driving end of the clamp motor 45, and the lower ends of the two main beams 331 are both provided with a joint 3311 and connected to the upper part of the heat insulation structure reinforcement plate 48 through a number of floating connectors (not shown in the figure). The heat insulation structure reinforcement plate 48 can not only strengthen the structural strength of the clamp assembly 4 itself, but also effectively isolate the high-temperature atmosphere below to prevent adverse effects on the drive device when grasping the workpiece A in the process of press quenching and other process operations. In addition, the connection between the longitudinal moving mechanism 3 and the clamp assembly 4 with a floating connector can also increase the safety gap between the clamp and the equipment such as the press during the falling process to prevent the impact caused by the rigid connection.

[0031] In addition, the gripper motor, the lateral movement motor and the longitudinal movement motor in this embodiment are all cooperation structures of a servo motor and a reducer, thereby ensuring that the motor can output sufficient torque.

[0032] As another embodiment of the utility model, the large workpiece transfer device may also include a stroke control unit (not shown) electrically connected to the gripper motor, the lateral movement motor and the longitudinal movement motor respectively. The stroke control unit may be a control panel with command buttons, or an automatic control unit composed of a programmable logic control circuit (PLC), or composed of a centralized control circuit, a centralized control system or a host computer, or a control unit connected to the entire production system, etc. The utility model does not limit the mode of the stroke control unit. At present, most of the existing workpiece heat treatment production lines have realized automatic control, and in view of the fact that the application of the stroke control unit to control the operation of each drive component according to the input or written instructions has long been a very widely used and common control method in the field of automatic control, that is, the existing control technology, therefore, the application of the stroke control unit in the utility model to control the operation of the above-mentioned drive components will not be described in detail.

[0033] The above are only preferred embodiments of the present utility model and are not intended to limit the patent scope of the present utility model. Other equivalent changes made using the patent concept of the present utility model should all fall within the patent protection scope of the present utility model.

Claims

1. A large workpiece transfer device, comprising: The gantry bracket, the transverse moving mechanism, the longitudinal moving mechanism and the clamping jaw assembly, the transverse moving mechanism is installed on the upper part of the gantry bracket, the longitudinal moving mechanism is installed on the transverse moving mechanism, and the clamping jaw assembly is installed on the lower part of the longitudinal moving mechanism, characterized in that the clamping jaw assembly is mainly composed of a supporting frame, four I-shaped channel steel rails, four clamping jaws, four racks, a clamping jaw motor and a driving shaft, the supporting frame is horizontally arranged and its transverse cross-section is square, the upper part of the supporting frame is connected to the longitudinal moving mechanism, the four I-shaped channel steel rails are horizontally and respectively fixedly arranged on the lower part of the supporting frame along the diagonal of the supporting frame, and the outer ends of the four I-shaped channel steel rails are respectively located at the four corners of the supporting frame, the inner ends of the four I-shaped channel steel rails are close to the center of the transverse cross-section of the supporting frame, both sides of the I-shaped channel steel rail have rail grooves, and the four clamping jaws are respectively The four racks are horizontally arranged and divided into two groups, the two racks in one group are respectively arranged on the upper parts of the two clamping jaws that move relative to each other along the same straight line direction and are located above the roller, and the two racks in the other group are respectively arranged on the upper parts of the two clamping jaws that move relative to each other along another straight line direction and are located below the roller. The clamping jaw motor is installed at the upper center of the supporting frame with its driving end facing downward, the driving shaft is vertically and rotatably penetrated through the center of the supporting frame, and the upper end of the driving shaft is connected to the driving end of the clamping jaw motor, and two gears are fixedly sleeved on the driving shaft corresponding to the two groups of racks and are respectively meshed with the two groups of racks. The four clamping jaws are driven by the clamping jaw motor to move closer to or farther away from each other along the diagonal direction of the supporting frame.

2. The large workpiece transfer device according to claim 1, characterized in that: The clamping jaw is composed of a mounting portion, a claw body and a claw head from top to bottom, and the mounting portion is composed of a horizontally arranged bottom plate, two vertically parallel guide plates spaced apart and four rollers, the lower ends of the two guide plates are fixedly coupled to the two opposite ends of the bottom plate, the four rollers are divided into two groups and are spaced apart on the two opposite side surfaces of the two guide plates, the claw body is in the shape of a strip plate and is vertically arranged parallel to the guide plates, the upper end of the claw body is fixedly coupled to the lower part of the bottom plate, the claw head is fixedly coupled to the lower end of the claw body and the claw head extends horizontally by a distance in the direction of the extension line of the drive shaft, and the clamping jaw is movably arranged at the lower part of the I-channel steel rail by embedding the rollers on the two opposite side surfaces of the two guide plates in the two side grooves of the I-channel steel rail.

3. The large workpiece transfer device according to claim 2, characterized in that: The two racks of one group are fixedly arranged on the upper ends of two guide plates on non-same sides of the two clamping jaws that move relative to each other along the same linear direction with their tooth surfaces facing each other and their two ends far away from each other, so that the two ends of the two racks of one group that are close to each other are meshed on both sides of the gear on the upper part of the driving shaft, and the two racks of the other group are also fixedly arranged on the lower parts of non-same side edges of the bottom plates of the two clamping jaws that move relative to each other along another linear direction with their tooth surfaces facing each other and their two ends far away from each other, so that the two ends of the two racks of the other group that are close to each other are meshed on both sides of the gear on the lower part of the driving shaft.

4. The large workpiece transfer device according to claim 1, characterized in that: The gantry support is mainly composed of several load-bearing columns, two long beams and two short beams. The several load-bearing columns are divided into two groups, each group contains a plurality of load-bearing columns of the same number and spaced at the same intervals and arranged vertically. The multiple load-bearing columns of the two groups are fixedly arranged on the ground or the base one by one along two parallel straight lines spaced at a distance. The two long beams are parallel and fixedly arranged on the upper ends of the multiple load-bearing columns of the two groups, and the two short beams are fixedly connected between the two ends of the two long beams.

5. The large workpiece transfer device according to claim 4, characterized in that: The lateral movement mechanism is mainly composed of two guide rails, two long lateral racks, a lateral movement frame, four guide wheels, a lateral movement motor and a lateral drive shaft. The two guide rails are horizontally arranged and fixedly arranged on the upper parts of the two long beams, and the two long lateral racks are also horizontally arranged and fixedly arranged on the opposite side walls of the two long beams. The lateral movement frame is horizontally arranged and its lateral cross-section is rectangular, and the four guide wheels are respectively installed at the four corners of its lower part, and a rectangular hollow installation opening is formed in the middle part of the lateral movement frame. The lateral movement motor is installed on one side of the lateral movement frame between the two guide rails. The driving shaft can be rotatably passed through the two bearing parts on one side of the transverse moving frame through its two ends so that it is horizontal and perpendicular to the transverse long racks and is arranged between the two guide rails, and the middle part of the transverse driving shaft is drivingly connected to the driving end of the transverse moving motor, and gears are fixedly installed on both ends of the transverse driving shaft. The transverse moving frame can be guided and moved on the two guide rails through the four guide wheels installed at the four corners of its lower part, and the gears at the two ends of the transverse driving shaft are meshed with the two transverse long racks, and the transverse moving frame is driven by the transverse moving motor to move horizontally along the guide rails.

6. The large workpiece transfer device according to claim 5, characterized in that: The longitudinal moving mechanism is mainly composed of two bearing plates, two longitudinal guide grooves, a longitudinal moving frame, two longitudinal guide rails, two longitudinal long racks, a longitudinal moving motor and a longitudinal driving shaft. The two bearing plates are vertically and parallelly spaced opposite to each other and are respectively fixedly arranged on the inner sides of two opposite edges of the mounting opening between the two long beams. The two longitudinal guide grooves are vertically and opposite to each other with grooves and are respectively fixedly arranged on two opposite side walls of the two bearing plates. The longitudinal moving frame is composed of two main beams vertically and parallelly spaced apart and several auxiliary beams horizontally connected between the two main beams. The lower ends of the two main beams are connected to the upper part of the bearing frame. The two longitudinal guide rails are vertically fixedly arranged on the two main beams away from each other. The outer side of the two wheels is fixedly mounted on the two main beams, and the two ends of the two main beams are rotatably arranged on the two opposite side walls of the two supporting plates through bearings, and are adjacent to the two longitudinal long racks. Two gears are provided on the fixed sleeves spaced apart on the longitudinal driving shaft and are respectively meshed with the two longitudinal long racks. One end of the longitudinal driving shaft adjacent to the longitudinal moving motor passes through the supporting plate and is connected to the driving end of the longitudinal moving motor. The two main beams are driven by the longitudinal moving motor to drive the clamping jaw assembly to rise or fall.

7. The large workpiece transfer device according to claim 6, characterized in that: The clamp assembly also includes: a heat insulation structure reinforcement plate, the heat insulation structure reinforcement plate is horizontally fixedly combined with the upper part of the supporting frame, the clamp motor is installed at the upper center of the heat insulation structure reinforcement plate, the drive shaft is vertically and rotatably passed through the center of the heat insulation structure reinforcement plate and its upper end is connected to the driving end of the clamp motor, and the lower ends of the two main beams have a joint and are connected to the upper part of the heat insulation structure reinforcement plate through a plurality of floating connectors.

8. The large workpiece transfer device according to claim 6, characterized in that: The gripper motor, the lateral movement motor and the longitudinal movement motor are all cooperative structures of a servo motor and a reducer.

9. The large workpiece transfer device according to claim 6, characterized in that: Also includes: A stroke control unit is electrically connected to the clamping jaw motor, the lateral movement motor and the longitudinal movement motor respectively.

10. The large workpiece transfer device according to claim 1, characterized in that: A maintenance platform is arranged on the outer side of the upper part of the gantry support.

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