A liftable workpiece pallet transfer vehicle

Abstract

The present invention relates to the field of semiconductor processing technology, and specifically to a liftable workpiece pallet transfer vehicle, in which a fixed frame, a lifting mechanism, a mobile frame and a pressure rod mechanism are all installed on a bottom frame, the lifting mechanism is used to control the position height of the front pin shaft interface, and is powered by a lithium battery; the fixed frame is used to provide a horizontal movement track for the mobile frame, and the mobile frame is used for horizontal movement to increase the operating range; the pressure rod mechanism is used to expand the operating range of the mobile frame, amplify the torque, and convert the rotational action into a lifting action. The present invention has a simple structure, a high assembly fault tolerance rate, is powered by a lithium battery, is free from the limitation of the power cord, and has a wide movable range. The pressure rod mechanism is used to lengthen the operating range of the mobile frame, amplify the torque, and convert the rotational action into a lifting action, and the workpiece pallet is directly moved into the high-temperature cavity of the processing equipment without manual labor, ensuring that the workpiece pallet is in a horizontal state during the transfer process, reducing the risk of the workpiece falling and being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor processing, and in particular to a liftable workpiece pallet transfer vehicle. Background Art

[0002] In the semiconductor processing industry, coating (thin film deposition) is a process that deposits a thin film on a material's surface, thereby modifying its properties or enhancing its functionality. Coating processes are widely used in materials science, semiconductor manufacturing, optics, and electronic device manufacturing. In order to improve the coating quality, it is necessary to create a high temperature and vacuum state in the cavity of the processing equipment during the coating process of parts; the process of placing the parts to be processed into the processing equipment is usually to use a small raising column to lift the parts to be processed and place them on the workpiece pallet, so that a gap is formed between the parts to be processed and the workpiece pallet, and the parts to be processed and the workpiece pallet are placed together in a fixed position in the cavity of the processing equipment, and the door of the processing equipment is closed to form a sealed cavity in the processing equipment. In order to improve processing efficiency and processing quality, the processing equipment needs to be preheated to a certain temperature before placing the parts to be processed. This temperature is usually higher than 200°C, and manual handling methods pose a risk of burns to operators; in order to improve processing efficiency, multiple parts to be processed will be placed each time, and the total weight of the workpiece pallet and the processed parts is large. Moreover, since the workpiece pallet and the parts to be processed are not fixedly connected, manual handling methods cannot ensure that the workpiece pallet remains horizontal during transportation, and there is a risk of falling and damage to the parts to be processed. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a liftable workpiece pallet transfer vehicle.

[0004] The specific technical solutions are as follows:

[0005] A liftable workpiece pallet transfer vehicle comprises a bottom frame, a lifting mechanism, a fixed frame, a movable frame and a pressure rod mechanism;

[0006] The fixed frame, lifting mechanism, mobile frame and pressure rod mechanism are all installed on the bottom frame. The lifting mechanism is used to control the position height of the front pin shaft interface and is powered by a lithium battery; the fixed frame is used to provide a horizontal movement track for the mobile frame, and the mobile frame is used for horizontal movement to increase the operating range; the pressure rod mechanism is used to expand the operating range of the mobile frame, amplify the torque, and convert the rotational motion into a lifting motion.

[0007] The bottom frame includes a lifting column bottom plate, on which a frame consisting of aluminum profiles A, aluminum profiles B, aluminum profiles C and aluminum profiles D is installed; aluminum profile end covers A are provided on both end surfaces of the aluminum profile B.

[0008] The lifting mechanism includes a pair of electric lifting columns, a lithium battery and a lifting column controller; the pair of electric lifting columns are arranged symmetrically on both sides of the lifting column base plate; a lithium battery rack is set in the middle position of the inner side of the aluminum profile C, and the lithium battery is hung on the lithium battery rack; a lifting column controller is set on the side of the lithium battery above the lifting column base plate, and the lifting column controller can synchronously control the two electric lifting columns.

[0009] The fixed frame is a bilaterally symmetrical structure, including a lifting column top plate and a circular track. The lifting column top plate is fixed above the electric lifting column. A frame composed of aluminum profiles G, aluminum profiles H, aluminum profiles I and aluminum profiles J is arranged above the lifting column top plate, and an aluminum profile end cover B is arranged on the exposed aluminum profile end face; two baffles are arranged on the side of the aluminum profile H for placing the pressure rod mechanism, and an operation panel is arranged on the side of the tail of the aluminum profile H. The operation panel adjusts the height of the electric lifting column and the preset height in real time; two groups of aluminum profiles E are arranged on both sides of the two aluminum profiles I, two in each group, and an aluminum profile F is arranged above each group of aluminum profiles E. The connection between the aluminum profile F and the tail aluminum profile E uses a free angle bracket, and the connection with the front aluminum profile E uses a connecting plate to lock from the side. The installation position of the connecting plate and the aluminum profile F is a long waist hole, and a pressure block is used to press the connecting plate and the aluminum profile F from the outside to fix it.

[0010] A lower rectangular tube and an upper rectangular tube are respectively provided on both sides of the movable frame, a workpiece support plate is placed on the two upper rectangular tubes, a limit connecting plate is provided under the tail of the lower rectangular tube, the limit connecting plate is L-shaped, a screw pad is provided on the inner wall of the tail of the lower rectangular tube, the limit connecting plate is connected and fixed to the lower rectangular tube with screws, an aluminum profile K is provided on the inner side of the tail of the two lower rectangular tubes, the limit connecting plate is connected to the bottom of the aluminum profile K, a hole is opened at the end face position of the aluminum profile K corresponding to the lower rectangular tube, and the two lower rectangular tubes are connected to the aluminum profile K with screws; an aluminum profile L is provided at the tail of the movable frame, two pressure rod support plates are provided in the middle position of the aluminum profile L, and the two pressure rod support plates are provided at the middle position of the two pressure rods. Two pressure rods are arranged between the pressure rod support plates, a knob plunger is arranged on the outer side of the pressure rod support plate on one side, aluminum profile adapter blocks and rotating brackets are respectively arranged on the end faces of both sides of the aluminum profile L, a groove is arranged on the side of the aluminum profile adapter block, and the rotating shaft A is installed in the groove; multiple through holes are respectively processed on the sides of the upper and lower rectangular tubes, bushings are arranged in the through holes, and the rotating shaft A passes through the tail of the lower rectangular tube through the bushing, and the lower part of the lifting connecting rod is connected to the rotating shaft A with screws; a rotating shaft B is arranged in the bushing in the through hole at the tail of the upper rectangular tube, and the rotating shaft B is a stepped shaft, the outer side of which is connected to the mounting hole above the lifting connecting rod, and the inner side is connected to the mounting hole above the rotating bracket;

[0011] Two sets of lifting link mechanisms are set in the middle and front positions of each set of upper and lower rectangular tubes. The lifting link mechanisms include two sets of lifting links, bushings and rotating shafts D. The rotating shafts D are optical axes, and threaded mounting holes are set in the middle of the two end faces. The bushings and rotating shafts D are passed through the through holes set on the sides of the upper and lower rectangular tubes to connect the upper and lower mounting holes of the lifting links with the two rotating shafts D. A bushing is set on the outer side above the front end lifting link mechanism, and the bushing is connected to the rotating shaft D with screws.

[0012] Two groups of roller mechanisms are respectively arranged at the bottom of the two lower rectangular tubes of the mobile frame, and two arc notches are arranged on the outer side of the side of the lower rectangular tube. A rotating shaft C, a bearing, a roller, a bushing A and a roller mounting block are arranged in sequence in each notch. The rotating shaft C is a stepped shaft, and the middle position of the roller is an inner arc groove. The inner arc radius corresponds to the circular track. Grooves are arranged on both sides, and bearings are arranged in the grooves. Screws are used to lock the roller mounting blocks from the inner sides of the lower rectangular tubes on both sides to fix the rotating shaft C and the roller; the rotating shaft E in the roller mechanism arranged at the front end of the mobile frame is longer than the rotating shaft C, and the end face extends out of the roller mounting block.

[0013] Two positioning pins are set above each upper rectangular tube of the mobile frame. The positioning pins have round heads. A limiting bending plate is set at the tail of the upper rectangular tube. A screw pad is set on the inner wall of the upper rectangular tube at the corresponding position. Screws are used to pass through the limiting bending plate and the upper rectangular tube to connect and fix them.

[0014] The main body of the pressure rod mechanism is an aluminum profile H, and an aluminum profile end cover C is set at the tail end face of the aluminum profile H, a handle is set on the side of the tail, and pressure rod limit A and pressure rod limit B are respectively set on both sides of the front section. The two structures are symmetrical, a circular groove is opened on the upper part of the front end, a chamfer is set at the bottom, and a circular hole is set on the side for inserting the knob plunger.

[0015] A caster mounting plate is provided at the bottom of the aluminum profile B, a caster support block is provided between the two sides of the aluminum profile B and the caster mounting plate, and a caster is provided at the bottom of the caster mounting plate. The caster is a universal anti-static type with a brake and the tread is a markless polyurethane.

[0016] A limit baffle is provided at the tail of the aluminum profile F, and the upper part of the limit baffle is higher than the upper end surface of the aluminum profile F; a limit plate is provided on the front side of the aluminum profile F, and a pad is provided between the limit plate and the aluminum profile F, and two notches are provided in the front and above the limit plate respectively, and a slope is processed in front of the upper notch; a docking block is provided at the front end of the aluminum profile F, and a docking groove is processed at the front end of the docking block, two semicircular grooves are processed on the top, and a docking pin is provided in the outer semicircular groove; a track pad is provided above the aluminum profile F, an arc groove is processed on the top of the track pad, and a conical countersunk hole and a threaded hole are processed on the bottom, and the track pad is locked upward from the bottom of the aluminum profile F with screws, and a circular track is provided in the arc groove of the track pad, and the front end of the circular track is placed in the semicircular groove inside the docking block.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The present invention has a simple structure and a high assembly fault tolerance rate. The position height of the front pin interface is controlled by an electric lifting column. It is powered by a lithium battery, is free from the limitation of the power line, and has a wide movable range. The pressure rod mechanism is used to extend the operating range of the mobile frame, amplify the torque, and convert the rotation action into a lifting action. The workpiece pallet is directly moved into the high-temperature cavity of the processing equipment without manual labor, ensuring that the workpiece pallet is in a horizontal state during the transportation process, reducing the risk of the workpiece falling and being damaged, and preventing the high temperature in the cavity of the processing equipment from causing burns to the operators, improving the stability of the workpiece pallet during transportation, and reducing the difficulty of the workpiece pallet lifting action. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the transfer vehicle of the present invention;

[0020] Figure 2 for Figure 1 Exploded diagram;

[0021] Figure 3 This is a schematic structural diagram of the bottom frame of the transfer vehicle of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the fixed frame of the transfer vehicle of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the mobile frame of the transfer vehicle of the present invention;

[0024] Figure 6 This is a schematic structural diagram of the pressure rod mechanism of the transfer vehicle of the present invention;

[0025] Figure 7-10 This is a working schematic diagram of the transfer vehicle of the present invention;

[0026] In the figure, 1. Electric lifting column; 2. Lithium battery; 3. Lifting column controller; 4. Operation panel; 5. Workpiece support plate; 6. Lifting column bottom plate; 7. Aluminum profile A; 8. Caster; 9. Caster mounting plate; 10. Aluminum profile end cover A; 11. Caster support block; 12. Aluminum profile B; 13. Aluminum profile C; 14. Lithium battery rack; 15. Aluminum profile D; 16. Lifting column top plate; 17. Baffle; 18. Aluminum profile E; 19. Connecting plate; 20. Press block; 21. Pad; 22. Limit plate; 23. Docking block; 24. Track bottom plate; 25. Docking pin; 26. Circular track; 27. Aluminum profile F; 28. Limit baffle; 29. ​​Aluminum profile G; 30. Aluminum profile end cover B; 31. Aluminum profile H; 32. Free angle bracket; 33. Aluminum profile L; 34. 4. Pressure rod support plate; 35. Pressure rod; 36. Knob plunger; 37. Screw pad; 38. Aluminum profile adapter block; 39. Rotating bracket; 40. Limit connecting plate; 41. Rotating shaft A; 42. Bushing; 43. Rotating shaft B; 44. Lifting connecting rod; 45. Roller mounting block; 46. Bushing A; 47. Bearing; 48. Roller; 49. Rotating shaft C; 50. Lower rectangular tube; 51. Upper rectangular tube; 52. Rotating shaft D; 53. Bushing B; 54. Rotating shaft E; 55. Locating pin; 56. Limit bending plate; 57. Aluminum profile H; 58. Pressure rod limit A; 59. Pressure rod limit B; 60. Handle; 61. Aluminum profile end cover C; 62. Aluminum profile I; 63. Aluminum profile J; 64. Aluminum profile K; 65. Processing equipment track; 66. Notch; 67. Long waist hole. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited by the accompanying drawings.

[0028] Figure 1 This is a schematic structural diagram of the transfer vehicle of the present invention. Figure 2 for Figure 1 Exploded diagram, Figure 3 This is a schematic structural diagram of the bottom frame of the transfer vehicle of the present invention. Figure 4 This is a schematic structural diagram of the fixed frame of the transfer vehicle of the present invention. Figure 5 This is a schematic structural diagram of the mobile frame of the transfer vehicle of the present invention. Figure 6 This is a structural diagram of the pressure rod mechanism of the transfer vehicle of the present invention, as shown in the figure:

[0029] The liftable workpiece pallet transfer vehicle of the present invention comprises a bottom frame, a lifting mechanism, a fixed frame, a movable frame and a pressure rod mechanism;

[0030] The fixed frame, lifting mechanism, mobile frame and pressure rod mechanism are all installed on the bottom frame. The lifting mechanism is used to control the position height of the front pin shaft interface and is powered by a lithium battery; the fixed frame is used to provide a horizontal movement track for the mobile frame, and the mobile frame is used for horizontal movement to increase the operating range; the pressure rod mechanism is used to expand the operating range of the mobile frame, amplify the torque, and convert the rotational motion into a lifting motion.

[0031] The bottom frame includes a lifting column base plate 6, mounted on which is a frame composed of aluminum profiles A7, B12, C13, and D15. Aluminum end caps A10 are attached to both ends of aluminum profile B12. Caster mounting plates 9 are attached to the bottom of aluminum profile B12, with caster support blocks 11 located between each side of aluminum profile B12 and the caster mounting plates 9. Casters 8 are mounted on the bottom of the caster mounting plates 9. These casters are universal, anti-static, and have brakes and non-marking polyurethane treads.

[0032] The lifting mechanism includes a pair of electric lifting columns 1, a lithium battery 2 and a lifting column controller 3; the pair of electric lifting columns 1 are arranged symmetrically on both sides of the lifting column base plate 6; a lithium battery rack 14 is set in the middle position on the inner side of the aluminum profile C13, and the lithium battery 2 is hung on the lithium battery rack 14. The lifting column controller 3 is set on the side of the lithium battery 2 above the lifting column base plate 6. The lifting column controller 3 can synchronously control the two electric lifting columns 1.

[0033] The fixed frame is a bilaterally symmetrical structure, including a lifting column top plate 16 and a circular track 26. The lifting column top plate 16 is fixed above the electric lifting column 1. A frame composed of aluminum profiles G29, aluminum profiles H31, aluminum profiles I62 and aluminum profiles J63 is set above the lifting column top plate 16. Aluminum profile end covers B30 are set on the exposed aluminum profile ends; two baffles 17 are set on the side of the aluminum profile H31 to place the pressure rod mechanism to prevent it from falling during the movement of the transfer vehicle. An operation panel 4 is set on the side of the tail of the aluminum profile H31. The operation panel 4. Real-time adjustment of the height of the electric lifting column 1 and the preset height. Two sets of two aluminum profiles E18 are placed on either side of the two aluminum profiles I62. Aluminum profile F27 is placed above each set of aluminum profiles E18. The aluminum profile F27 is connected to the rear aluminum profile E18 using a free-angle bracket 32 ​​and to the front aluminum profile E18 using a connecting plate 19, which is locked from the side. The connecting plate 19 and the aluminum profile F27 are mounted at the long waist hole 67. A pressure block 20 is used to press the connecting plate 19 and the aluminum profile F27 from the outside to secure them. Adjusting the long waist hole 67 of the connecting plate 19 and the free-angle bracket 32 ​​allows for fine-tuning of the level of the two aluminum profiles F27 placed above the aluminum profiles E18, improving assembly tolerance.

[0034] A lower rectangular tube 50 and an upper rectangular tube 51 are respectively provided on both sides of the mobile frame, and a workpiece support plate 5 is installed on the two upper rectangular tubes 51, and a limit connecting plate 40 is provided below the tail of the lower rectangular tube 50. The limit connecting plate 40 is L-shaped, and a screw pad 37 is provided on the inner wall of the tail of the lower rectangular tube 50. The limit connecting plate 40 is connected and fixed to the lower rectangular tube 50 with screws, and an aluminum profile K64 is provided on the inner side of the tail of the two lower rectangular tubes 50, and the limit connecting plate 40 is connected to the bottom of the aluminum profile K64. A hole is opened at the end face position of the aluminum profile K64 corresponding to the lower rectangular tube 50, and the two lower rectangular tubes 50 are connected to the aluminum profile K64 with screws; an aluminum profile L33 is provided at the tail of the mobile frame, and two pressure rod support plates 34 are provided in the middle position of the aluminum profile L33. Two pressure rods 35 are set between the rod support plates 34, and a knob plunger 36 is set on the outer side of the pressure rod support plate 34 on one side. Aluminum profile adapter blocks 38 and rotating brackets 39 are respectively set on the end faces of both sides of the aluminum profile L33, and grooves are set on the sides of the aluminum profile adapter blocks 38, and the rotating shaft A41 is installed in the grooves; multiple through holes are respectively processed on the sides of the upper rectangular tube 51 and the lower rectangular tube 50, and bushings 42 are set in the through holes. The rotating shaft A41 passes through the tail of the lower rectangular tube 50 through the bushings 42, and the lower part of the lifting connecting rod 44 is connected to the rotating shaft A41 with screws; a rotating shaft B43 is set in the bushing 42 in the through hole at the tail of the upper rectangular tube 51. The rotating shaft B43 is a stepped shaft, and the outer side is connected to the mounting hole above the lifting connecting rod 44, and the inner side is connected to the mounting hole above the rotating bracket 39;

[0035] Two sets of lifting link mechanisms are set in the middle and front positions of each set of upper rectangular tubes 51 and lower rectangular tubes 50. The lifting link mechanisms include two sets of lifting links 44, bushings 42 and rotating shafts D52. The rotating shafts D52 are optical axes, and threaded mounting holes are set in the middle of the two end faces. The bushings 42 and the rotating shafts D52 are passed through the through holes set on the sides of the upper rectangular tubes 51 and the lower rectangular tubes 50, so that the upper and lower mounting holes of the lifting links 44 are connected together with the two rotating shafts D52. A bushing is set on the outer side above the front end lifting link mechanism, and the bushing is connected to the rotating shaft D52 with screws.

[0036] Two sets of roller mechanisms are respectively provided at the bottom of the two lower rectangular tubes 50 of the mobile frame, and two arc notches are provided on the outer side of the lower rectangular tube 50. A rotating shaft C49, a bearing 47, a roller 48, a bushing A46 and a roller mounting block 45 are sequentially provided in each notch. The rotating shaft C49 is a stepped shaft, and the middle position of the roller 48 is an inner arc groove, the inner arc radius corresponds to the circular track 26, grooves are provided on both sides, and bearings 47 are provided in the grooves. Screws are used to lock the roller mounting blocks 45 from the inner sides of the lower rectangular tubes 50 on both sides to fix the rotating shaft C49 and the roller 48; the rotating shaft E54 in the roller mechanism provided at the front end of the mobile frame is longer than the rotating shaft C49, and the end face extends out of the roller mounting block 45.

[0037] Two positioning pins 55 are set above each upper rectangular tube 51 of the mobile frame. The positioning pins 55 have round heads. A limiting bending plate 56 is set at the tail of the upper rectangular tube 51, and a screw pad 37 is set on the inner wall of the upper rectangular tube 51 at the corresponding position. Screws are used to pass through the limiting bending plate 56 and the upper rectangular tube 51 to connect and fix them.

[0038] The main body of the pressure rod mechanism is an aluminum profile H57, and an aluminum profile end cover C61 is set at the tail end face of the aluminum profile H57, a handle 60 is set on the side of the tail, and pressure rod limits A58 and pressure rod limits B59 are set on both sides of the front section. The two structures are symmetrical, a circular groove 66 is opened on the upper part of the front end, a chamfer is set at the bottom, and a circular hole is set on the side for inserting the knob plunger 36.

[0039] A limit baffle 28 is provided at the tail of the aluminum profile F27, and the upper part of the limit baffle 28 is higher than the upper end surface of the aluminum profile F27; a limit plate 22 is provided on the front side of the aluminum profile F27, and a pad 21 is provided between the limit plate 22 and the aluminum profile F27, and two notches are respectively provided in the front and upper part of the limit plate, and a slope is processed in front of the upper notch; a docking block 23 is provided at the front end of the aluminum profile F27, and a docking groove is processed at the front end of the docking block 23, and two semicircular grooves are processed on the top, and a docking pin 25 is provided in the outer semicircular groove; a track pad 24 is provided above the aluminum profile F27, and an arc groove is processed on the top of the track pad 24, and a conical countersunk hole and a threaded hole are processed on the bottom. The track pad 24 is locked upward from the bottom of the aluminum profile F27 with screws, and a circular track 26 is provided in the arc groove of the track pad 24, and the front end of the circular track 26 is placed in the semicircular groove inside the docking block 23.

[0040] Figure 7-10 The workpiece support plate 5 is placed on the upper rectangular tube 51 of the mobile mechanism, the control button on the operation panel 4 is operated to move the transfer vehicle, and the height and position of the middle frame are adjusted so that the docking pin 25 and the circular track 26 of the front end of the transfer vehicle are aligned with the structure of the processing equipment; the pressure rod mechanism is clamped in the rotating mechanism pressure rod 35 at the tail end of the mobile frame, and the pressure rod mechanism is pressed down to make the upper rectangular tube lift the workpiece support plate 5 and move upward, and at the same time, the shaft sleeve 42 on the side of the upper rectangular tube 51 is separated from the limit plate 22; the pressure rod mechanism is pushed to make the mobile frame lift the workpiece support plate 5 and the workpiece into the processing cavity, and after the workpiece support plate 5 is placed, the pressure rod mechanism is pulled to make the mobile frame withdraw from the processing equipment cavity, and the pressure rod is raised to make the shaft sleeve set on the side of the mobile frame fall into the card slot of the limit plate 22, fix the mobile frame, control the electric lifting column 1 to rise, unlock the docking pin 25 interface between the front end of the transfer vehicle and the processing equipment, and the mobile transfer vehicle withdraws from the processing equipment.

Claims

1. A liftable workpiece pallet transfer vehicle, characterized by: It includes a bottom frame, a lifting mechanism, a fixed frame, a movable frame and a pressure rod mechanism; The fixed frame, lifting mechanism, mobile frame and pressure rod mechanism are all installed on the bottom frame. The lifting mechanism is used to control the position height of the front end pin shaft interface and is powered by a lithium battery. The fixed frame is used to provide a horizontal movement track for the mobile frame. The mobile frame is used for horizontal movement to increase the operating range. The pressure rod mechanism is used to expand the operating range of the mobile frame, amplify the torque, and convert the rotation action into a lifting action. A lower rectangular tube and an upper rectangular tube are respectively provided on both sides of the mobile frame, and a workpiece support plate is placed on the two upper rectangular tubes. A limit connecting plate is provided under the tail of the lower rectangular tube, and the limit connecting plate is L-shaped. A screw pad is provided on the inner wall of the tail of the lower rectangular tube, and the limit connecting plate is connected and fixed to the lower rectangular tube with screws. An aluminum profile K is provided on the inner side of the tail of the two lower rectangular tubes, and the limit connecting plate is connected to the bottom of the aluminum profile K. A hole is opened on the end surface of the aluminum profile K, and screws are used to connect the two lower rectangular tubes to the aluminum profile K; an aluminum profile L is set at the tail of the movable frame, two pressure rod support plates are set in the middle position of the aluminum profile L, two pressure rods are set between the two pressure rod support plates, a knob plunger is set on the outer side of the pressure rod support plate on one side, aluminum profile adapter blocks and rotating brackets are respectively set on the end surfaces of both sides of the aluminum profile L, grooves are set on the sides of the aluminum profile adapter blocks, and the rotating shaft A is installed in the grooves; multiple through holes are respectively processed on the sides of the upper rectangular tube and the lower rectangular tube, bushings are set in the through holes, and the rotating shaft A passes through the tail of the lower rectangular tube through the bushings, and the bottom of the lifting connecting rod is connected to the rotating shaft A with screws; a rotating shaft B is set in the bushing in the through hole at the tail of the upper rectangular tube, and the rotating shaft B is a stepped shaft, the outer side of which is connected to the mounting hole above the lifting connecting rod, and the inner side is connected to the mounting hole above the rotating bracket; Two sets of lifting link mechanisms are set in the middle and front positions of each set of upper and lower rectangular tubes. The lifting link mechanisms include two sets of lifting links, bushings and rotating shafts D. The rotating shafts D are optical axes, and threaded mounting holes are set in the middle of the two end faces. The bushings and rotating shafts D are passed through the through holes set on the sides of the upper and lower rectangular tubes to connect the upper and lower mounting holes of the lifting links with the two rotating shafts D. A bushing is set on the upper and outer sides of the front lifting link mechanism, and the bushing is connected to the rotating shaft D with screws; The main body of the pressure rod mechanism is an aluminum profile H, and an aluminum profile end cover C is set at the tail end face of the aluminum profile H, a handle is set on the side of the tail, and pressure rod limit A and pressure rod limit B are respectively set on both sides of the front section. The two structures are symmetrical, a circular groove is opened on the upper part of the front end, a chamfer is set at the bottom, and a circular hole is set on the side for inserting the knob plunger.

2. The liftable workpiece pallet transfer vehicle according to claim 1, characterized in that: The bottom frame includes a lifting column bottom plate, on which a frame consisting of aluminum profiles A, aluminum profiles B, aluminum profiles C and aluminum profiles D is installed; aluminum profile end covers A are provided on both end surfaces of the aluminum profile B.

3. The liftable workpiece pallet transfer vehicle according to claim 2, characterized in that: The lifting mechanism includes a pair of electric lifting columns, a lithium battery and a lifting column controller; the pair of electric lifting columns are arranged symmetrically on both sides of the lifting column base plate; a lithium battery rack is set in the middle position of the inner side of the aluminum profile C, and the lithium battery is hung on the lithium battery rack; a lifting column controller is set on the side of the lithium battery above the lifting column base plate, and the lifting column controller can synchronously control the two electric lifting columns.

4. The liftable workpiece pallet transfer vehicle according to claim 2, characterized in that: The fixed frame is a bilaterally symmetrical structure, including a lifting column top plate and a circular track. The lifting column top plate is fixed above the electric lifting column. A frame composed of aluminum profiles G, aluminum profiles H, aluminum profiles I and aluminum profiles J is arranged above the lifting column top plate, and an aluminum profile end cover B is arranged on the exposed aluminum profile end face; two baffles are arranged on the side of the aluminum profile H for placing the pressure rod mechanism, and an operation panel is arranged on the side of the tail of the aluminum profile H. The operation panel adjusts the height of the electric lifting column and the preset height in real time; two groups of aluminum profiles E are arranged on both sides of the two aluminum profiles I, two in each group, and an aluminum profile F is arranged above each group of aluminum profiles E. The connection between the aluminum profile F and the tail aluminum profile E uses a free angle bracket, and the connection with the front aluminum profile E uses a connecting plate to lock from the side. The installation position of the connecting plate and the aluminum profile F is a long waist hole, and a pressure block is used to press the connecting plate and the aluminum profile F from the outside to fix it.

5. The liftable workpiece pallet transfer vehicle according to claim 1, characterized in that: Two groups of roller mechanisms are respectively arranged at the bottom of the two lower rectangular tubes of the mobile frame, and two arc notches are arranged on the outer side of the side of the lower rectangular tube. A rotating shaft C, a bearing, a roller, a bushing A and a roller mounting block are arranged in sequence in each notch. The rotating shaft C is a stepped shaft, and the middle position of the roller is an inner arc groove. The inner arc radius corresponds to the circular track. Grooves are arranged on both sides, and bearings are arranged in the grooves. Screws are used to lock the roller mounting blocks from the inner sides of the lower rectangular tubes on both sides to fix the rotating shaft C and the roller; the rotating shaft E in the roller mechanism arranged at the front end of the mobile frame is longer than the rotating shaft C, and the end face extends out of the roller mounting block.

6. The liftable workpiece pallet transfer vehicle according to claim 1, characterized in that: Two positioning pins are set above each upper rectangular tube of the mobile frame. The positioning pins have round heads. A limiting bending plate is set at the tail of the upper rectangular tube. A screw pad is set on the inner wall of the upper rectangular tube at the corresponding position. Screws are used to pass through the limiting bending plate and the upper rectangular tube to connect and fix them.

7. The liftable workpiece pallet transfer vehicle according to claim 2, characterized in that: A caster mounting plate is provided at the bottom of the aluminum profile B, a caster support block is provided between the two sides of the aluminum profile B and the caster mounting plate, and a caster is provided at the bottom of the caster mounting plate. The caster is a universal anti-static type with a brake and the tread is a markless polyurethane.

8. The liftable workpiece pallet transfer vehicle according to claim 4, characterized in that: A limit baffle is provided at the tail of the aluminum profile F, and the upper part of the limit baffle is higher than the upper end surface of the aluminum profile F; a limit plate is provided on the front side of the aluminum profile F, and a pad is provided between the limit plate and the aluminum profile F, and two notches are provided in the front and above the limit plate respectively, and a slope is processed in front of the upper notch; a docking block is provided at the front end of the aluminum profile F, and a docking groove is processed at the front end of the docking block, two semicircular grooves are processed on the top, and a docking pin is provided in the outer semicircular groove; a track pad is provided above the aluminum profile F, an arc groove is processed on the top of the track pad, and a conical countersunk hole and a threaded hole are processed on the bottom, and the track pad is locked upward from the bottom of the aluminum profile F with screws, and a circular track is provided in the arc groove of the track pad, and the front end of the circular track is placed in the semicircular groove inside the docking block.

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