WO2024109425A1 - 护理床床板专用的焊接机器人变位机 - Google Patents

护理床床板专用的焊接机器人变位机 Download PDF

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Publication number
WO2024109425A1
WO2024109425A1 PCT/CN2023/126427 CN2023126427W WO2024109425A1 WO 2024109425 A1 WO2024109425 A1 WO 2024109425A1 CN 2023126427 W CN2023126427 W CN 2023126427W WO 2024109425 A1 WO2024109425 A1 WO 2024109425A1
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WO
WIPO (PCT)
Prior art keywords
bracket
end assembly
block
welding robot
bed board
Prior art date
Application number
PCT/CN2023/126427
Other languages
English (en)
French (fr)
Inventor
谢健峰
Original Assignee
厚福医疗装备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 厚福医疗装备有限公司 filed Critical 厚福医疗装备有限公司
Publication of WO2024109425A1 publication Critical patent/WO2024109425A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/047Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to the technical field related to welding processing, and in particular to a welding robot positioner dedicated to a nursing bed board.
  • nursing beds are beds used by patients with limited mobility during hospitalization.
  • the bed plates are made of steel through cutting and welding.
  • the manual welding seams are not beautiful enough and the weld surface needs to be polished later. Therefore, the workpiece can be repositioned as needed to achieve multi-angle automatic welding, which can achieve automatic welding to the greatest extent and is of great significance.
  • the authorized invention patent with announcement number CN111590263B and announcement date April 12, 2022 discloses a positioner for welding processing, including a frame and a No. 1 motor installed on the frame, the No. 1 motor is connected to a rocker, the rocker is hingedly connected to a main rocker, and a support frame hingedly connected to both of the main rocker and the frame is provided.
  • a movable seat is welded to the left front of the support frame; a position control box is installed on the movable seat, a position shaft is installed on the position control box through a bearing, and the position shaft is connected to a position disc; a position control assembly connected to the position shaft is installed in the position control box.
  • the present invention is easy to use, not only can it adjust the welding position angle and the welding deflection angle of the welded parts, but also can control the size of each rotation angle, thereby effectively improving the adjustment accuracy, achieving an effect of more convenient adjustment and facilitating welding processing, and has strong practicality.
  • the shortcoming of the prior art is that when the bed plate is welded, the insulation method between the bed plate and the positioner is relatively simple.
  • the bed plate and the positioner are separated only by using insulating components, and the role of the insulating components is limited to this.
  • the connection position between the wire and the bed plate is basically randomly placed by the technicians, which hinders the positioner from adjusting the bed plate's change position and is not conducive to improving the welding efficiency of the bed plate.
  • the purpose of the present invention is to provide a welding robot positioner dedicated to a nursing bed board to solve the technical problems in the related art.
  • the present invention provides the following technical solutions:
  • a welding robot positioner specially used for a nursing bed board comprises a machine base, on which a driving end assembly and a free end assembly are provided, the driving end assembly and the free end assembly jointly support a bracket, the driving end assembly drives the bracket to deflect, the free end assembly electrically connects the bracket to a welding unit, the driving end assembly is connected to one end of the bracket via a first insulating component, the free end assembly is connected to the other end of the bracket, and the machine base is connected to the free end assembly via a second insulating component.
  • the bracket is composed of a rectangular frame and two supporting rods arranged in parallel along the length direction of the rectangular frame, and the two supporting rods are used to install the clamp.
  • the driving end assembly is provided with a power output block, the first insulating component is fixedly connected to the output block, and the bracket is fixedly connected to the first insulating component at a position close to the driving end assembly.
  • the first insulating component includes a first insulating plate arranged between the bracket and the output block, a first pressure block is provided on the surface of the bracket facing away from the first insulating plate, and a second pressure block is provided on the surface of the output block facing away from the bracket, the first pressure block and the second pressure block are connected by a plurality of first pins, and the first pins pass through the bracket, the first insulating plate and the output block, and the first pins are connected to the output block by a first insulating sleeve.
  • a second insulating plate is provided between the output block and the second pressing block.
  • the drive end assembly is composed of an optical encoder, an electromagnetic brake, a servo motor and an RV reducer.
  • the optical encoder is electrically connected to the welding robot, and the output shaft of the RV reducer is fixedly connected to the output block.
  • the free end assembly includes a support block fixedly connected to the bracket, and a movable shaft rotatably arranged on the support block, the movable shaft is connected to the second insulating component through a bearing seat, and a conductive joint is provided on the movable shaft to connect with the welding unit.
  • the second insulating component includes a third insulating plate provided between the bearing seat and the machine base, the third insulating plate is connected to the bearing seat and the machine base through a plurality of second pins, and the second pins are connected to the bearing seat through a second insulating sleeve.
  • the rotation center axis of the bracket, the axis of the movable shaft and the power output axis of the RV reducer coincide with each other.
  • the bracket is composed of a housing fixedly connected to the first insulating member and a rectangular frame that can be telescopically changed in the width direction.
  • the support rod is a telescopic structure and can slide in the length direction of the rectangular frame.
  • a first locking mechanism is provided in the short side of the rectangular frame. When not in operation, the first locking mechanism The rectangular frame in the retracted state is locked, and during operation, the first locking mechanism locks the rectangular frame and the housing.
  • the current generated by welding can be prevented from being introduced into the driving end assembly, and on the other hand, the connection transmission between the driving end assembly and the bracket can be ensured to be stable;
  • insulation can be formed between the free end assembly and the machine base, thus preventing the welding high current loop from interfering with the operation of the positioner.
  • FIG1 is a schematic diagram of the three-dimensional structure of a welding robot positioner dedicated to a nursing bed board provided by an embodiment of the present invention
  • FIG2 is a schematic diagram of the three-dimensional structure of the main mechanical components of a welding robot positioner dedicated to a nursing bed board provided by an embodiment of the present invention
  • FIG3 is a schematic diagram of an exploded structure of a first insulating component of a welding robot positioner dedicated to a nursing bed board provided by an embodiment of the present invention
  • FIG4 is a schematic diagram of a partial cross-sectional structure of FIG3 ;
  • FIG. 5 is a schematic cross-sectional structure diagram of a bracket of a welding robot positioner dedicated to a nursing bed board provided by an embodiment of the present invention when it is not unfolded;
  • FIG. 6 is a schematic cross-sectional structural diagram of a bracket of a welding robot positioner dedicated to a nursing bed board provided by an embodiment of the present invention when it is unfolded;
  • FIG. 7 is a schematic cross-sectional structural diagram of a bracket of a welding robot positioner dedicated to a nursing bed board provided by an embodiment of the present invention when preparing to retract;
  • FIG. 8 is a schematic cross-sectional view of the second locking mechanism of a welding robot positioner dedicated to a nursing bed board provided by an embodiment of the present invention when in operation;
  • FIG. 9 is an enlarged structural schematic diagram of point A in FIG. 8 .
  • an embodiment of the present invention provides a welding robot positioner dedicated to a nursing bed board, including a base 1, on which a driving end assembly 2 and a free end assembly 3 are provided, the driving end assembly 2 and the free end assembly 3 jointly support a bracket 4, the driving end assembly 2 drives the bracket 4 to deflect, the free end assembly 3 electrically connects the bracket 4 to a welding unit, the driving end assembly 2 is connected to one end of the bracket 4 through a first insulating component 5, the free end assembly 3 is connected to the other end of the bracket 4, and the base 1 is connected to the free end assembly 3 through a second insulating component 6.
  • the welding robot positioner provided in this embodiment is used for welding the bed board of a nursing bed, wherein the bracket 4 is used to fix the bed board, and the drive end assembly 2 drives the bracket 4 to move to adjust the position of the bed board.
  • a control center such as setting a human-machine interaction interface, that is, setting a display screen to display alarm information, detecting the working status of the equipment circuit, and randomly setting the rotation angle, speed and other information of the positioner according to the interface
  • the servo channel server can receive the action command of the control center, output electric energy to drive the drive end assembly 2 to operate, then the drive end assembly 2 needs to be electrically connected to the welding robot, and a monitor that monitors the welding robot's welding workpiece at all times, such as an optical encoder, and the optical encoder converts the welding situation into an electrical signal and transmits it to the servo driver, so that the servo driver can output electric energy, then the drive end assembly 2 also needs a driving part, such as a
  • a reducer is installed at the output end of the servo motor.
  • the reducer is an RV reducer, and a high-precision low-backlash coaxial reducer is used, and a high-input end input is used.
  • the servo motor has a high speed and low torque, and the output end outputs low speed and high torque.
  • a small motor can be used to drive a large load.
  • the high precision and low backlash can control the transmission error to the maximum extent.
  • the servo motor needs to be connected to a brake mechanism, such as an electromagnetic brake.
  • a brake mechanism such as an electromagnetic brake.
  • the electromagnetic brake When the servo motor rotates, the electromagnetic brake is energized and the brake is released; when the servo motor stops rotating and the power is cut off, the electromagnetic brake coil is synchronously deenergized, and the brake locks the servo motor to prevent the servo motor from rotating under the influence of external force. In this way, the rotation of the bracket 4 can drive the angle of the welded workpiece to rotate more accurately.
  • the embodiment of the present invention sets a first insulating component 5 between the driving end assembly 2 and the bracket 4.
  • the first insulating component 5 separates the output end of the reducer from the bracket 4, so that the two are connected in an indirect manner.
  • an output block 20 can be set at the output end of the reducer, the first insulating component 5 is fixedly connected to the output block 20, and the bracket 4 is fixedly connected to the first insulating component 5, so that the first insulating component 5 can not only play an insulating role, but also play a role in transmitting the power of the output block 20 to the bracket 4.
  • the embodiment of the present invention preferably includes a bracket 30 fixed to the bracket 4, and a movable shaft 31 rotatably arranged on the bracket 30.
  • the movable shaft 31 is connected to the second insulating member 6 through a bearing seat.
  • the movable shaft 31 is provided with a conductive joint 32 connected to the welding unit.
  • the support block 30 can ensure that the bracket 4 is stably connected to the movable shaft 31, and the movable shaft 31 can ensure the normal rotation of the bracket 4, and the conductive joint 32 can export the current generated by welding to the welding unit, wherein there are many types of conductive joints 32.
  • the conductive joint 32 is a liquid metal rotary joint, which is used for rotary conduction in special industries and can conduct a current of up to 1000A in a rotating state. It has the characteristics of small size, small rotation resistance, small conductive resistance, low power consumption, etc., and is more suitable for conductive use in welding positioners.
  • the beneficial effects of the present invention are as follows: by separating the driving end assembly 2 of the bracket 4 from the free end assembly 3, power input and current output can be carried out from the two farther sides of the bracket 4.
  • the first insulating component 5 on the one hand, the current generated by welding can be prevented from being introduced into the driving end assembly 2, and on the other hand, the connection transmission stability between the driving end assembly 2 and the bracket 4 can be guaranteed.
  • the second insulating component 6 insulation can be formed between the free end assembly 3 and the base 1, thereby preventing the large welding current loop from interfering with the operation of the positioner.
  • the bracket 4 is composed of a rectangular frame 40 and two support rods 41 arranged in parallel along the length direction of the rectangular frame 40, and the two support rods 41 are used to install the clamp; specifically, the two support rods 41 are respectively arranged on the inner sides of the two wide sides of the rectangular frame 40, so that the rectangular frame 40 and the two support rods 41 assemble the bracket 4 into a " ⁇ "-shaped structure.
  • the " ⁇ "-shaped structure has many hollow parts, which is convenient for the mechanical arm of the welding robot to insert and weld.
  • the first insulating member 5 includes a first insulating plate 50 arranged between the bracket 4 and the output block 20, a first pressure block 51 is provided on the surface of the bracket 4 facing away from the first insulating plate 50, and a second pressure block 52 is provided on the surface of the output block 20 facing away from the bracket 4, the first pressure block 51 and the second pressure block 52 are connected by a plurality of first pins 53, and the first pins 53 pass through the bracket 4, the first insulating plate 50 and the output block 20, and the first pin 53 is connected to the output block 20 by a first pin insulating sleeve 54.
  • the first insulating plate 50 insulates the bracket 4 from the output block 20 to prevent the current on the bracket 4 from being introduced into the output block 20.
  • the first pressure block 51 and the second pressure block 52 cooperate with a plurality of first pins 53 to firmly connect the bracket 4 to the output block 20.
  • the first pin insulating sleeve 54 can prevent the first pin 53 from introducing the current on the bracket 4 into the output block 20.
  • a second insulating plate 55 is arranged between the output block 20 and the second pressure block 52.
  • the first insulating plate 50 and the second insulating plate 55 cooperate with a plurality of first pins 53 and a plurality of first pin insulating sleeves 54 to jointly form an enclosing isolation of the output block 20, thereby further avoiding the problem of welding current interfering with the operation of the drive end assembly 2.
  • the second insulating component 6 includes a third insulating plate 60 provided between the bearing seat and the machine base 1 , the third insulating plate 60 is connected to the bearing seat and the machine base 1 through a plurality of second pins 61 , and the second pins 61 are connected to the bearing seat through a second insulating sleeve 62 .
  • a conductive connector 32 is provided on the movable shaft 31, the bracket 4, the support block 30 and the movable shaft 31 carry current during operation, and the driving end assembly 2 and the movable end assembly are both arranged on the machine base 1, so the movable shaft 31 may be insulated from the machine base 1. Therefore, in the embodiment of the present invention, a third insulating plate 60 is provided at the connection between the bearing seat of the movable shaft 31 and the machine base 1, and a second insulating sleeve 62 is provided between the second pin rod 61 for fixing and the bearing seat, so as to completely insulate and isolate the movable shaft 31 from the machine base 1 to avoid the problem of welding current interfering with the operation of the driving end assembly 2.
  • the bracket 4 plays the role of installing the fixture to support the workpiece, so the bracket 4 needs to be replaced (different bed plates) or repaired regularly, and the existing connection between the bracket 4 and the drive end assembly 2 and the free end assembly 3 is fixed by bolts, which is time-consuming and labor-intensive to disassemble and assemble the bracket 4.
  • the existing bracket 4 is basically customized according to the size of the workpiece to be welded, and its size is large, which brings inconvenience to transportation and storage. Therefore, the present invention provides In another embodiment, as shown in FIGS.
  • the bracket 4 is composed of a shell 42 fixedly connected to the first insulating member 5 and a rectangular frame 40 that can be telescopically changed in the width direction
  • the support rod 41 is a telescopic structure and can slide in the length direction of the rectangular frame 40 to adapt to the position change when installing different clamps
  • a first locking mechanism 7 is provided in the short side of the rectangular frame 40.
  • the first locking mechanism 7 locks the rectangular frame 40 in a contracted state, that is, the overall size of the bracket 4 is shortened in the lateral direction, and is locked by the first locking mechanism 7.
  • the first locking mechanism 7 locks the rectangular frame 40 and the shell 42, and the shell 42 can be directly fixed to the drive end assembly 2.
  • a second locking mechanism 8 is provided inside the long side of the rectangular frame 40. During operation, the second locking mechanism 8 locks the support rod 41 on the long side of the rectangular frame 40 and locks the clamp on the support rod 41 at the same time. Depending on the different clamps, the clamp can be installed at a suitable position on the bracket 4 to facilitate welding operations by the welding robot, and the installation of the clamp on the bracket 4 can be locked by the second locking mechanism 8.
  • the short side of the rectangular frame 40 is composed of three sections, the middle section is connected to the shell 42, which is named the first main section 400, and the other two sections are slidably inserted into the two ends of the length direction of the first main section 400, respectively, and are named the first sub-section 401.
  • the end of the first sub-section 401 away from the first main section 400 is fixedly connected to the end of the long side of the rectangular frame 40, and the first locking mechanism 7 includes a first rod 70 that is slidably arranged in the long side of the rectangular frame 40 along the sliding direction of the first sub-section 401 in the first main section 400, and a second rod 71 is slidably arranged in the first sub-section 401 along the sliding direction of the first sub-section 401 in the first main section 400.
  • the first rod 70 is fixedly connected to the end of the second rod 71 away from the first main section 400, and the end of the second rod 71 away from the long side of the rectangular frame 40 is installed with a first block 72.
  • Two limit blocks 73 are provided in a row, and a first spring is connected between the first main section 400 and the limit block 73 (for the connection method between the first main section 400 and the shell 42, it can be that when the midline of the shell 42 in the length direction is parallel to the horizontal line, and the midline of the first main section 400 in the length direction is also parallel to the horizontal line, the first main section 400 moves in the horizontal direction perpendicular to its midline and connects with the shell 42, and then the positions of the two limit blocks 73 in the first main section 400 are symmetrically arranged in the vertical direction with the midline of the first main section 400 as the symmetry axis, and then the limit block 73 and the first main section 400 are connected by the first spring), two limit grooves 74 are arranged in parallel in the shell 42, and the two limit blocks 73 are arranged in one-to-one correspondence in the two limit grooves 74, and a space is reserved between the limit block 73 and the bottom wall of the limit groove 74.
  • the spacing between the middle parts of the two limit blocks 73 is greater than the spacing between the two ends.
  • the first extrusion surface 75 as an inclined surface between the middle part and the two ends of the limit block 73 is used for transition.
  • the first extrusion head 76 is provided at one end of the first sub-section 401 away from the long side of the rectangular frame 40. The first extrusion head 76 is attached to the first extrusion surface 75.
  • the first extrusion surface 75 has a limiting effect on the first extrusion head 76, and limits the first sub-section 401 in the direction of sliding out of the first main section 400, so as to prevent the first sub-section 401 from sliding out of the first main section 400. It slides out from the first main section 400, and a first plug block 77 is provided on the first block 72, and a first slot 78 is opened on the limit block 73. When the first sub-section 401 does not extend out from the first main section 400, the first plug block 77 is inserted into the first slot 78.
  • the first plug block 77 and the first slot 78 work together to limit the limit block 73 in the sliding direction of the first sub-section 401 in the first main section 400.
  • the first main section 400 and the first sub-section 401 have two limiting functions to further prevent the first sub-section 401 from extending out of the first main section 400 when the bracket 4 is carried.
  • the first rod 70 is pulled to drive the second rod 71 to move in the first sub-section 401, and the second rod 71 drives the first block 72 to move, so that the first plug block 77 is first disengaged from the first slot 78, and the movement direction of the limit block 73 toward the limit slot 74 is not restricted, and then the first block 72 continues to be moved and will contact the first extrusion head 76, and the movement of the first block 72 is restricted by the first extrusion head 76, so that the entire first sub-section 401 will have a tendency to slide in the first main section 400, and the first extrusion head 76 will press the first extrusion surface 75 produces an extrusion effect, so that the limit block 73 can have a power to move toward the bottom of the limit groove 74.
  • the embodiment of the present invention sets the position where the first extrusion head 76 contacts the first extrusion surface 75 to a wedge-shaped structure, and the moving direction of the limit block 73 is restricted. After the first extrusion head 76 applies force to the first extrusion surface 75, the limit block 73 will begin to overcome the elastic force of the first spring and move toward the limit groove 74 until the first extrusion surface 75 is completely separated from the first extrusion head 76. Then, the sliding of the first sub-section 401 in the first main section 400 is unrestricted, thereby completing the extension of the bracket 4 in the width direction.
  • a second extrusion head 79 is slidably provided in the first extrusion head 76, and a second spring is connected between the two.
  • the second spring gives the first extrusion head 76 a force that makes the first sub-section 401 extend out of the first main section 400, and the elastic force of the first spring makes the first extrusion surface 75 generate an extrusion force on the first extrusion head 76, so that the first sub-section 401 cannot extend out of the first main section 400.
  • the above two forces make the first sub-section 401 stably stuck in the first main section 400, and the limit block 73 is close to the rectangular frame 40
  • a second extrusion surface 790 is provided at the end of the long side. In the process of first extending the first main section 400, the second extrusion head 79 slides in contact with the limit block 73.
  • the second extrusion head 79 will separate from the first extrusion head 76 by a certain distance.
  • the second extrusion head 79 will be at a position of the movement stroke with the second extrusion surface 790, and at this time, the first extrusion head 76 no longer has an extrusion effect on the limit block 73. In this way, the limit block 73 tends to separate from the limit groove 74 under the action of the rebound force of the first spring.
  • the second The extrusion surface 790 will abut against the second extrusion head 79 to limit the second extrusion head 79 in the length direction of the first main section 400, and the second extrusion head 79 will limit the movement of the limit block 73.
  • the limit block 73 will not completely disengage from the limit groove 74, so there is still a locking effect between the first main section 400 and the shell 42. Since the limit block 73 is partially disengaged from the limit groove 74, its end will limit the end of the first sub-section 401, so that the first sub-section 401 can no longer retract into the first main section 400. In this way, the first main section 400 and the shell 42 are locked, and the first main section 400 and the first sub-section 401 are also locked.
  • the first rod 70 needs to be pulled forcefully to drive the second rod 71 to move away from the first main section 400, so that the first block 72 generates a pulling force on the second extrusion head 79, allowing the second extrusion head 79 to compress the second spring and gradually approach the first extrusion head 76.
  • the second extrusion head 79 and the second extrusion surface 790 are also arranged in a wedge-shaped structure.
  • the second extrusion head 79 In the process of the second extrusion head 79 gradually approaching the first extrusion head 76, the second extrusion head 79 generates an extrusion effect on the second extrusion surface 790, so that the limit block 73 overcomes the elastic force of the first spring and moves toward the limit groove 74 until the limit block 73 is fully plugged into the limit groove 74. At this time, the limit block 73 can no longer limit the retraction of the first sub-section 401 into the first main section 400, but in order to avoid limiting When the positioning block 73 is reset due to the rebound force of the first spring, a second block 791 is provided at the end of the second extrusion head 79 away from the first extrusion head 76 in the embodiment of the present invention.
  • the second block 791 limits the reset of the positioning block 73, so that the first sub-section 401 can be pushed in the reverse direction to retract into the first main section 400. After the first sub-section 401 is completely retracted into the first main section 400, the second block 791 no longer has a restrictive effect on the positioning block 73 because it enters the larger space in the middle of the two positioning blocks 73.
  • the positioning block 73 is completely reset under the elastic force of the first spring, and then the first rod 70 is pushed to drive the second rod 71 to move toward the direction close to the first main section 400, so that the first plug block 77 on the first block 72 is inserted into the first slot 78, and the first main section 400 and the first sub-section 401 are in a locked state, and the first main section 400 is in locking contact with the shell 42.
  • the second locking mechanism 8 includes a first rod 70 A plurality of third rods 80 are arranged in parallel in the length direction, and a third block 81 is installed at one end of the third rod 80 away from the first rod 70, wherein the support rod 41 is also composed of three sections, including a second main section 82, and two second sub-sections 83 slidably arranged at the ends of the second main section 82 in the length direction, and the second sub-section 83 is connected to the long side of the rectangular frame 40 by a clamping block 84, and a mounting seat 85 is inserted on the clamping block 84, and the mounting seat 85 is used to be fixed with the clamp, and a swing rod 86 is hinged to the cavity in the clamping block 84, and a torsion spring is provided on the hinge shaft to provide torsional resistance, a second plug-
  • the rocker arm 86 forms a certain angle with the moving path.
  • the moving path is a horizontal line
  • the midline of the rocker arm in the length direction forms an angle of 10° with the horizontal line.
  • the third block 81 moves toward the rocker arm 86, it will first enter a part of the angle.
  • the third block has a total length of 10 cm, and it will contact the rocker arm 86 after entering the angle 4 cm.
  • the third block 81 has 6 cm left and wants to enter the angle again, which will squeeze the rocker arm 86.
  • the rocker arm 86 rotates around the hinge point with the block 84 as the axis, so that the angle becomes larger.
  • the rocker arm 86 is squeezed and swung, thereby driving the second plug block 87 to move toward the second slot 88, so that the second plug block 87 can limit the mounting seat 85 from being separated from the block 84, so as to achieve the installation of the fixture.
  • the first lever 70 When the first lever 70 is in the forward direction, the first lever 70 is in the forward direction, and ...
  • the rod 86 is reset under the action of the torsion spring rebound force, driving the second plug block 87 to disengage from the second slot 88, thereby unlocking the mounting seat 85 and the block 84; therefore, only after the first sub-section 401 extends the maximum distance of the first main section 400 and is locked, as shown in FIG6, when the first rod 70 is pushed to move toward the center position of the first main section 400, as shown in FIG8, the third rod 80 will bring the third block 81 into the block 84 to produce an extrusion effect on the swing rod 86, and the first rod 70 can be pushed to move toward the first main section 400.
  • the first rod 70 will push the third rod 80 to drive the third block 81 to squeeze the swing rod 86.
  • the swing of the swing rod 86 increases the elastic force of the torsion spring, and the swing rod 86 will be affected by the elastic force to act on the third block 81 in the opposite direction, so that the third block 81 tends to move away from the swing rod 86.
  • the swing rod 86 when the swing rod 86 is in contact with the third block 81 Positions, respectively provided with a third extrusion surface 89 and a fourth extrusion surface 90, the places where the third block 81 contacts the third extrusion surface 89 are set as wedge structures, after the third block 81 finishes extruding the third extrusion surface 89, the third block 81 contacts the fourth extrusion surface 90, and the fourth extrusion surface 90 is perpendicular to the moving direction of the second sub-section 83 in the second main section 82 based on the extrusion force direction of the third block 81, so that the third block 81 will not be moved in the opposite direction by the rocker arm 86, thereby firmly locking the clamp.
  • the same action is performed as when the first sub-section 401 is retracted into the first main section 400, that is, the first rod 70 is pulled to drive the second rod 71 and the third rod 80 to move together in the direction away from the first main section 400, so that the third block 81 is separated from the rocker arm 86, and the rocker arm 86 is reset under the action of the rebound force of the torsion spring, and the second plug block 87 is separated from the second slot 88, and the clamp can be removed.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Resistance Welding (AREA)

Abstract

本发明公开了一种护理床床板专用的焊接机器人变位机,包括机座,所述机座上设有驱动端总成和自由端总成,所述驱动端总成和所述自由端总成共同支撑一托架,所述驱动端总成驱动所述托架偏转,所述自由端总成将所述托架与焊接单元电连接,所述驱动端总成与所述托架一端通过第一绝缘构件连接,所述自由端总成与托架另一端连接,所述机座与所述自由端总成通过第二绝缘构件连接。

Description

护理床床板专用的焊接机器人变位机 技术领域
本发明涉及焊接加工相关技术领域,具体的说是一种护理床床板专用的焊接机器人变位机。
背景技术
公知的,护理床是行动不方便的病人在住院时使用的病床,其床板由钢材通过裁切、焊接加工而成。目前对于护理床床板的焊接加工,很难用机器人一次完成全部的焊接,这样必须在自动焊接完成后,部分机器人无法施焊的位置由技工手工焊接,而手工焊接焊缝不够美观,后续需要打磨焊缝表面,因此将工件根据需要变换位置,实现多角度自动焊接,能最大程度的实现自动焊接,具有重要意义。
如公告号为CN111590263B,公告日为2022年04年12日的授权发明专利,其公开了一种焊接加工用变位机,包括机架以及安装在机架上的一号电机,所述一号电机连接有摇杆,摇杆铰接连有主摆杆,所述主摆杆与机架之间设有与二者均铰接相连的支撑架。所述支撑架左前部焊接有活动座;所述活动座上安装有变位控制箱,变位控制箱上通过轴承安装有变位轴,变位轴连接有变位圆盘;变位控制箱内安装有与变位轴相连的变位控制组件。本发明使用方便,不仅能够对焊接件进行焊接位置角度的调节和焊接偏转角度的调节,还能够对每次旋转角度大小进行控制,从而有效提高了调节精度,达到调节更加方便并便于焊接加工的效果,具有较强的实用性。
现有技术的不足之处在于,对于床板进行焊接加工时,床板与变位机之间的绝缘方式较为简单,只是通过使用绝缘构件将床板与变位机隔开,而绝缘构件的作用也仅限于此,还有由于焊接过程中会产生较强的电流,需要将该电流导出,而导线与床板之间的连接位置基本上是技工随机放置的,这对于变位机调整床板变换位置有阻碍,不利于提高床板的焊接效率。
发明内容
本发明的目的是提供一种护理床床板专用的焊接机器人变位机,解决相关技术中的技术问题。
为了实现上述目的,本发明提供如下技术方案:
一种护理床床板专用的焊接机器人变位机,包括机座,所述机座上设有驱动端总成和自由端总成,所述驱动端总成和所述自由端总成共同支撑一托架,所述驱动端总成驱动所述托架偏转,所述自由端总成将所述托架与焊接单元电连接,所述驱动端总成与所述托架一端通过第一绝缘构件连接,所述自由端总成与托架另一端连接,所述机座与所述自由端总成通过第二绝缘构件连接。
上述的,所述托架由一矩形框和两个沿矩形框长度方向并列的设置的支杆共同组成,两个所述支杆用于安装夹具。
上述的,所述驱动端总成上设有一动力输出块,所述第一绝缘构件固接于所述输出块上,所述托架靠近所述驱动端总成的位置固接于所述第一绝缘构件上。
上述的,所述第一绝缘构件包括设在所述托架与所述输出块之间的第一绝缘板,所述托架上背离所述第一绝缘板的表面上设有第一压块,所述输出块背离所述托架的表面上设有第二压块,所述第一压块和所述第二压块之间通过若干第一销杆连接,且所述第一销杆贯穿所述托架、所述第一绝缘板以及所述输出块,所述第一销杆与所述输出块之间通过第一绝缘套连接。
上述的,所述输出块与所述第二压块之间设有第二绝缘板。
上述的,所述驱动端总成由光学编码器、电磁刹车、伺服电机以及RV减速机共同组成,光学编码器与焊接机器人电连接,RV减速机的输出轴与所述输出块固接。
上述的,所述自由端总成包括与所述托架固接的托块,以及转动设于所述托块上的活动轴,所述活动轴通过轴承座与所述第二绝缘构件连接,所述活动轴上设有一导电接头与焊接单元连接。
上述的,所述第二绝缘构件包括一设在所述轴承座与所述机座之间的第三绝缘板,所述第三绝缘板通过若干第二销杆连接于轴承座以及所述机座,所述第二销杆与轴承座之间通过第二绝缘套连接。
上述的,所述托架的转动中心轴线、所述活动轴的轴线与所述RV减速机的动力输出轴线重合。
上述的,所述托架由与第一绝缘构件固接的壳体以及可以在宽度方向伸缩变化的矩形框组成,所述支杆为伸缩结构且可在所述矩形框的长度方向上滑动,所述矩形框的短边内设有第一锁定机构,未作业时,所述第一锁定机构 将处于收缩状态的所述矩形框锁定,作业时,所述第一锁定机构将所述矩形框与所述壳体锁定。
本发明的有益效果在于:通过将托架的驱动端总成与自由端总成分开,可以将动力输入以及电流导出从托架上较远的两个边进行;
通过设置第一绝缘构件,一方面可以避免焊接产生的电流导入驱动端总成,另一方面可以保障驱动端总成与托架之间的连接传动稳定;
通过设置第二绝缘构件,在自由端总成与机座之间可以形成绝缘,如此可以避免焊接大电流回路干扰变位机的运行。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明中记载的一些实施例,对于本领域普通技术人员来讲,还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种护理床床板专用的焊接机器人变位机的立体结构示意图;
图2为本发明实施例提供的一种护理床床板专用的焊接机器人变位机的主要机械构件立体结构示意图;
图3为本发明实施例提供的一种护理床床板专用的焊接机器人变位机的第一绝缘构件爆炸结构示意图;
图4为图3的局部剖面结构示意图;
图5为本发明实施例提供的一种护理床床板专用的焊接机器人变位机的托架未展开时的剖面结构示意图;
图6为本发明实施例提供的一种护理床床板专用的焊接机器人变位机的托架展开时的剖面结构示意图;
图7为本发明实施例提供的一种护理床床板专用的焊接机器人变位机的托架准备收缩时的剖面结构示意图;
图8为本发明实施例提供的一种护理床床板专用的焊接机器人变位机的第二锁定机构作业时的剖面结构示意图;
图9为图8的A处放大结构示意图图。
附图标记说明:
1、机座;2、驱动端总成;20、输出块;3、自由端总成;30、托块;31、
活动轴;32、导电接头;4、托架;40、矩形框;400、第一主节;401、第一副节;41、支杆;42、壳体;5、第一绝缘构件;50、第一绝缘板;51、第一压块;52、第二压块;53、第一销杆;54、第一绝缘套;55、第二绝缘板;6、第二绝缘构件;60、第三绝缘板;61、第二销杆;62、第二绝缘套;7、第一锁定机构;70、第一杆;71、第二杆;72、第一块;73、限位块;74、限位槽;75、第一挤压面;76、第一挤压头;77、第一插块;78、第一插槽;79、第二挤压头;790、第二挤压面;791、第二块;8、第二锁定机构;80、第三杆;81、第三块;82、第二主节;83、第二副节;84、卡块;85、安装座;86、摆杆;87、第二插块;88、第二插槽;89、第三挤压面;90、第四挤压面。
具体实施方式
为了使本领域的技术人员更好地理解本发明的技术方案,下面将结合附图对本发明作进一步的详细介绍。
如图1至图4所示,本发明实施例提供的一种护理床床板专用的焊接机器人变位机,包括机座1,所述机座1上设有驱动端总成2和自由端总成3,所述驱动端总成2和所述自由端总成3共同支撑一托架4,所述驱动端总成2驱动所述托架4偏转,所述自由端总成3将所述托架4与焊接单元电连接,所述驱动端总成2与所述托架4一端通过第一绝缘构件5连接,所述自由端总成3与托架4另一端连接,所述机座1与所述自由端总成3通过第二绝缘构件6连接。
具体的,本实施例提供的焊接机器人变位机用于护理床床板的焊接,其中托架4用于床板的固定,驱动端总成2驱动托架4运动以实现对床板位置的调整,通过设置控制中心(如设置人机交互界面,即设置显示屏可以显示报警信息,检测设备电路工作状态,同时可以根据界面随机设置变位机的旋转角度、速度等信息)以及伺服驱动器,伺服渠道服器可以接收控制中心的动作指令,输出电能驱动驱动端总成2运行,则驱动端总成2需要与焊接机器人电连接,时刻监测着焊接机器人焊接工件的情况的监测器,如光学编码器,光学编码器并且将焊接情况转换成电信号传输给伺服驱动器,如此伺服驱动器便可以输出电能,则驱动端总成2还需要一个驱动件,如伺服电机,伺服电机获得电能后为托架4的转动提供动力,由于伺服电机的转速较快,而工件变换角度的速度不需要多块,则在伺服电机的输出端安装一减速机,优选的,减速机为RV减速机,采用高精度低背隙同轴减速机,输入端输入高 速低扭矩,输出端输出低速大扭矩,能用较小的电机驱动大的负荷,高精度低背隙能最大限度控制传动误差,当托架4带动工件偏转到指定角度后,伺服电机需要及时的停止工作,以避免托架4转动角度过大的情况出现,因此伺服电机还需连接一刹车机构,如电磁刹车,伺服电机转动时,电磁刹车通电,松开刹车;伺服电机停止转动断电时,电磁刹车线圈同步断电,刹车锁住伺服电机,防止伺服电机受外力影响转动,如此便可以实现托架4转动带动被焊工件角度更为精确的转动,以上焊接装置的现有技术,不一一赘述具体的细节实现结构。
由于工件焊接时会产生较强的电流,因此本发明实施例在驱动端总成2与托架4之间设置第一绝缘构件5,第一绝缘构件5将减速机输出端与托架4之间隔开,使得二者以间接连接的方式连接,如此在减速机的输出端可以设置一输出块20,第一绝缘构件5与输出块20固接,托架4与第一绝缘构件5固接,以使得第一绝缘构件5起到绝缘作用的同时,还可以起到将输出块20动力传递给托架4的作用。
焊接加工过程中,产生的电流需要导引走,且导引的位置应远离驱动端总成2,由于没有绝对的绝缘体,在电流够大时,绝缘体也可以变成导体,因此为避免其干扰驱动端总成2的正常运行,本发明实施例优选的,自由端总成3包括与托架4固接的托块30,以及转动设于托块30上的活动轴31,活动轴31通过轴承座与第二绝缘构件6连接,活动轴31上设有一导电接头32与焊接单元连接,为保证托架4被驱动端总成2带着正常转动,则托架4的转动中心轴线、活动轴31的轴线与RV减速机的动力输出轴线重合,托块30可以保证托架4稳定的与活动轴31连接,而活动轴31可以保证托架4的正常转动,导电接头32可以将焊接产生的电流导出至焊接单元,其中导电接头32的种类很多,本发明实施例优选的,导电接头32为液态金属旋转接头,该接头为特殊行业旋转导电用,可在旋转状态下传导最高达1000A的电流,具有体积小,转动阻力微小小,导电电阻小,功耗低等特点,较为适合焊接变位机导电使用。
本发明的有益效果在于:通过将托架4的驱动端总成2与自由端总成3分开,可以将动力输入以及电流导出从托架4上较远的两个边进行,通过设置第一绝缘构件5,一方面可以避免焊接产生的电流导入驱动端总成2,另一方面可以保障驱动端总成2与托架4之间的连接传动稳定,通过设置第二绝缘构件6,在自由端总成3与机座1之间可以形成绝缘,如此可以避免焊接大电流回路干扰变位机的运行。
优选的,所述托架4由一矩形框40和两个沿矩形框40长度方向并列的设置的支杆41共同组成,两个所述支杆41用于安装夹具;具体的,两个支杆41分别布置于矩形框40的两个宽边的内侧,如此矩形框40和两个支杆41将托架4组装呈目字型结构,目字型结构镂空部位多,便于焊接机器人的机械臂穿插焊接。
优选的,所述第一绝缘构件5包括设在所述托架4与所述输出块20之间的第一绝缘板50,所述托架4上背离所述第一绝缘板50的表面上设有第一压块51,所述输出块20背离所述托架4的表面上设有第二压块52,所述第一压块51和所述第二压块52之间通过若干第一销杆53连接,且所述第一销杆53贯穿所述托架4、所述第一绝缘板50以及所述输出块20,所述第一销杆53与所述输出块20之间通过第一销绝缘套54连接。
具体的,第一绝缘板50将托架4与输出块20绝缘隔离,避免托架4上的电流导入输出块20,第一压块51和第二压块52配合若干第一销杆53,可以将托架4与输出块20稳固连接,第一销绝缘套54可以避免第一销杆53将托架4上的电流导入输出块20,且本发明实施例中,在输出块20与第二压块52之间设置第二绝缘板55,则第一绝缘板50、第二绝缘板55配合若干第一销杆53和若干第一销绝缘套54,共同形成对输出块20的包围式隔离,进一步的避免了焊接电流干扰驱动端总成2运行的问题出现。
优选的,所述第二绝缘构件6包括一设在所述轴承座与所述机座1之间的第三绝缘板60,所述第三绝缘板60通过若干第二销杆61连接于轴承座以及所述机座1,所述第二销杆61与轴承座之间通过第二绝缘套62连接。
具体的,因为活动轴31上设有导电接头32,因此托架4、托块30以及活动轴31在作业时是带有电流的,而驱动端总成2与活动端总成均设在机座1上,因此也许将活动轴31与机座1做绝缘隔离,因此本发明实施例在活动轴31的轴承座与机座1的连接处设置第三绝缘板60,且用于固定的第二销杆61与轴承座之间设置第二绝缘套62,将活动轴31彻底与机座1之间绝缘隔离,以避免焊接电流干扰驱动端总成2运行的问题出现。
在本发明实施例中,变位机在使用过程中,托架4起到安装夹具承托工件的作用,因此需要定期的对托架4进行更换(不同床板)或检修,而现有的托架4与驱动端总成2以及自由端总成3之间的连接均是通过螺栓固接,这对托架4的拆装较为费时费力,还有现有托架4基本上是根据被焊接工件的尺寸定制而成,其尺寸较大,对于搬运存放带来不便,因此本发明提供的 另一个实施例中,如图5至图9所示,进一步的,托架4由与第一绝缘构件5固接的壳体42以及可以在宽度方向进行伸缩变化的矩形框40组成,支杆41为伸缩结构且可在矩形框40的长度方向上滑动,以适应安装不同夹具时的位置变化,且在矩形框40的短边内设有第一锁定机构7,未作业时,所述第一锁定机构7将处于收缩状态的所述矩形框40锁定,即将托架4的整体尺寸在横向上缩短,并通过第一锁定机构7进行锁定,避免托架4在搬运过程中出现伸缩变化,造成搬运不便,作业时,所述第一锁定机构7将所述矩形框40与所述壳体42锁定,壳体42可以直接先与驱动端总成2固接,在使用托架4时,先解开第一锁定机构7对矩形框40短边的锁定,然后将矩形框40沿宽度方向拉伸,将拉伸后的矩形框40,短边中间部分与壳体42连接,再使用第一锁定机构7将矩形框40该部分与壳体42之间锁定,如此即可完成托架4的安装。
所述矩形框40的长边内设有第二锁定机构8,作业时,所述第二锁定机构8将所述支杆41锁定在所述矩形框40的长边上,同时将夹具锁定在所述支杆41上,可以根据夹具的不同,将夹具安装在托架4上合适的位置,以便焊接机器人焊接操作,而且夹具在托架4上的安装可以由第二锁定机构8锁定。
其中矩形框40的短边由三节组成,位于中间的一节是与壳体42连接的,将其命名为第一主节400,其余两节分别滑动插接在第一主节400的长度方向两端,命名为第一副节401,第一副节401远离第一主节400的一端与矩形框40的长边端部固接,则第一锁定机构7包括沿第一副节401在第一主节400内滑动方向滑动设置于矩形框40长边内的第一杆70,第一副节401内沿第一副节401在第一主节400内滑动方向滑动设有第二杆71,第一杆70与第二杆71远离第一主节400的一端固接,第二杆71远离矩形框40长边的一端安装有第一块72,第一主节400内并列设有两个限位块73,且第一主节400与限位块73之间连接有第一弹簧(对于第一主节400与壳体42之间的连接方式,可以是当壳体42长度方向的中线与水平线平行,第一主节400长度方向的中线也与水平线平行时,第一主节400以朝着水平垂直其中线方向移动与壳体42连接,然后两个限位块73在第一主节400内的位置,则是在竖向方向上以第一主节400中线为对称轴对称设置,然后限位块73与第一主节400之间再通过第一弹簧连接),壳体42内并列开设有两个限位槽74,两个限位块73在两个限位槽74内一一对应布置,限位块73与限位槽74的底壁间预留一间 隙,两个限位块73中部之间的间距大于两端之间的间距,限位块73上中部与两端之间作为斜面的第一挤压面75进行过度,第一副节401远离矩形框40长边的一端设有第一挤压头76,第一挤压头76贴合于第一挤压面75上,在第一副节401没有从第一主节400内伸出时,在第一弹簧的弹力作用下,第一挤压面75对第一挤压头76产生限位作用,且在第一副节401从第一主节400内滑出方向上进行限制,避免第一副节401从第一主节400内滑出,且在第一块72上设有第一插块77,在限位块73上开设有第一插槽78,在第一副节401没有从第一主节400内伸出时,第一插块77插进第一插槽78内,此时第一插块77和第一插槽78共同作用在垂直于第一副节401在第一主节400内滑动方向上对限位块73进行限制,如此第一主节400与第一副节401有两处限位作用,以进一步的避免搬运托架4时,第一副节401从第一主节400内伸出。
上述在作业时,第一副节401要从第一主节400内滑出时,通过拉动第一杆70带动第二杆71在第一副节401内移动,第二杆71则带动第一块72移动,则第一插块77先从第一插槽78内脱离,限位块73朝着限位槽74的移动方向上不受限制,然后第一块72继续被带着移动便会接触第一挤压头76,且第一块72的移动被第一挤压头76限制,如此整个第一副节401便会有在第一主节400内滑动的趋势,则第一挤压头76便会对第一挤压面75产生挤压作用,使得限位块73可以有个朝着限位槽74的槽底方向移动的动力,因此本发明实施例将第一挤压头76与第一挤压面75接触的位置均设置成楔形结构,而限位块73的移动方向受限制,则第一挤压头76给予第一挤压面75力后,限位块73便会开始克服第一弹簧的弹力朝着限位槽74内移动,直到第一挤压面75与第一挤压头76完全脱离,则第一副节401在第一主节400内的滑动便不受限制,如此以完成托架4在宽度方向上的伸展。
但是在第一副节401伸出第一主节400最大距离后,为防止在作用过程中出现松动,则需对二者再次进行锁定,因此本发明实施例中,在第一挤压头76内滑动设有第二挤压头79,且二者之间连接有第二弹簧,在第一副节401完全缩进第一主节400内时,第二弹簧被压缩,第一挤压头76与第二挤压头79相互抵靠,此时第二弹簧给予第一挤压头76一个使得第一副节401伸出第一主节400的力,而第一弹簧的弹力使得第一挤压面75对第一挤压头76产生挤压力,使得第一副节401无法伸出第一主节400,上述两个力使得第一副节401稳定的卡在第一主节400内,其中还在限位块73靠近矩形框40 长边的端部开设第二挤压面790,在第一伸出第一主节400的过程中,第二挤压头79与限位块73之间滑动接触,则在第二弹簧的弹力作用下,第二挤压头79会与第一挤压头76脱离一定距离,在第一副节401伸出第一主节400最大距离后,第二挤压头79便会在与第二挤压面790移动行程的位置上,且此时第一挤压头76不再对限位块73有挤压作用,如此限位块73在第一弹簧的回弹力作用下有脱离限位槽74的趋势,则在限位块73逐渐远离限位槽74的行程中,第二挤压面790便会与第二挤压头79抵靠以实现对第二挤压头79在第一主节400长度方向的限位,则第二挤压头79便会对限位块73的移动起到了限制作用,限位块73又不会完全脱离限位槽74,则第一主节400与壳体42之间还存在锁定作用,限位块73由于脱离了限位槽74一部分,则其端部便会对第一副节401的端部产生限位,使得此时第一副节401无法再缩进第一主节400内,如此第一主节400与壳体42被锁定,第一主节400与第一副节401之间也被锁定。
在第一副节401需要缩进第一主节400内时,则先强力需要拉动第一杆70带动第二杆71朝着远离第一主节400的方式移动,使得第一块72对第二挤压头79产生拉力,让第二挤压头79压缩第二弹簧自己逐渐靠近第一挤压头76,为便于第二挤压头79与第二挤压面790脱离,第二挤压头79与第二挤压面790也均设置成楔形结构,则在第二挤压头79逐渐靠近第一挤压头76的过程中,第二挤压头79对第二挤压面790产生挤压作用,使得限位块73克服第一弹簧的弹力朝着限位槽74内移动,直到限位块73与限位槽74完全插接,此时限位块73不再可以对第一副节401缩进第一主节400产生限制,但是为避免限位块73受第一弹簧回弹力作用出现复位的情况,则本发明实施例在第二挤压头79远离第一挤压头76的端部设置第二块791,第二块791对限位块73的复位进行限制,如此便可反向推动第一副节401缩进第一主节400内,等到第一副节401完全缩进第一主节400内后,第二块791由于进入到两个限位块73中部的较大空间内对于限位块73不再有限制作用,则限位块73在第一弹簧的弹力作用下完全复位,再推动第一杆70带动第二杆71朝着靠近第一主节400的方向移动,使得第一块72上的第一插块77插进第一插槽78内,第一主节400与第一副节401呈锁定状态,第一主节400与壳体42之间的锁定接触。
由于夹持工件的夹具是设置在支杆41上的,因此为便于夹具的安装与拆卸,本发明实施例中设置第二锁定机构8,第二锁定机构8包括沿第一杆70 长度方向并列设置的多个第三杆80,第三杆80远离第一杆70的一端安装有第三块81,其中支杆41也由三节组成,包括一第二主节82,和两个在第二主节82长度方向端部滑动设置的第二副节83,第二副节83与矩形框40长边之间由卡块84连接,卡块84上插接有安装座85,安装座85用于与夹具固接,在卡块84内的空腔铰接有摆杆86且铰接轴上设有扭簧以提供扭转阻力,摆杆86上安装有第二插块87,在安装座85上开设有第二插槽88,第三块81朝着靠近第二主节82方向移动时,会对摆杆86产生挤压(第三块81对于摆杆86产生挤压的原因如在第三块81的移动路径上,摆杆86与该移动路径呈一定角度的夹角,如移动路径为一水平线,而摆杆长度方向上的中线与该水平线呈10°夹角,则在第三块81朝着摆杆86移动时,会先进入该夹角内一部分,如第三块总长10cm,进入夹角4cm后便与摆杆86接触,之后第三块81剩余6cm再想进入该夹角便会对摆杆86产生挤压,如此摆杆86以其与卡块84的铰接点为轴进行转动,使得该夹角角度变大),摆杆86受挤压摆动,从而带动第二插块87朝着第二插槽88内移动,使得第二插块87可以限制安装座85脱离卡块84,以实现对夹具的安装。
在作业时,第一副节401伸出第一主节400最大距离后,此时二者直接被锁定,第一块72朝着第一主节400方向移动时,不会对该锁定产生影响(第一副节401未开始有伸出第一主节400的趋势时,如图5所示,此时第一块72受限位块73阻碍,第一杆70是无法朝着第一主节400中心位置移动的,则第三块81便不会与摆杆86接触,摆杆86在扭簧弹力作用下,带动第二插块87完全处于卡块84内;在第一副节401伸出第一主节400最大距离并锁定,需要对二者进行解锁时,如图7所示,则拉动第一杆70朝着远离第一主节400中心位置移动,同时第一杆70的移动会带动第三杆80同步移动,此时第三块81是远离摆杆86的,如此摆杆86在扭簧回弹力作用下复位,带动第二插块87从第二插槽88内脱离,实现安装座85与卡块84之间的解锁;因此只有在第一副节401伸出第一主节400最大距离并锁定后,如图6所示,推动第一杆70朝着第一主节400中心位置移动时,如图8所示,第三杆80才会带着第三块81进入卡块84内对摆杆86产生挤压作用),便可以推动第一杆70朝着靠近第一主节400方向移动,则第一杆70便会推动第三杆80带动第三块81挤压摆杆86,摆杆86的摆动使得扭簧的弹力增加,则摆杆86便会受弹力影响反向作用第三块81,使得第三块81有远离摆杆86的趋势,为避免夹具的安装不稳定,则本发明实施例中,在摆杆86与第三块81接触的 位置,分别设有第三挤压面89以及第四挤压面90,第三块81与第三挤压面89接触的地方均设置为楔形结构,在第三块81挤压第三挤压面89结束后,第三块81与第四挤压面90接触,第四挤压面90基于第三块81的挤压力方向与第二副节83在第二主节82内移动方向垂直,如此第三块81便不会受摆杆86作用反向移动,从而将夹具稳固锁定。
需要拆卸夹具时,跟需要第一副节401缩进第一主节400内做相同的动作,即拉动第一杆70带动第二杆71和第三杆80共同朝着远离第一主节400的方向移动,使得第三块81脱离摆杆86,则摆杆86在扭簧的回弹力作用下复位,第二插块87从第二插槽88内脱离,则夹具即可被拆下。
以上只通过说明的方式描述了本发明的某些示范性实施例,毋庸置疑,对于本领域的普通技术人员,在不偏离本发明的精神和范围的情况下,可以用各种不同的方式对所描述的实施例进行修正。因此,上述附图和描述在本质上是说明性的,不应理解为对本发明权利要求保护范围的限制。

Claims (10)

  1. 一种护理床床板专用的焊接机器人变位机,包括机座,其特征在于:所述机座上设有驱动端总成和自由端总成,所述驱动端总成和所述自由端总成共同支撑一托架,所述驱动端总成驱动所述托架偏转,所述自由端总成将所述托架与焊接单元电连接;
    所述驱动端总成与所述托架一端通过第一绝缘构件连接,所述自由端总成与托架另一端连接,所述机座与所述自由端总成通过第二绝缘构件连接。
  2. 根据权利要求1所述的护理床床板专用的焊接机器人变位机,其特征在于,所述托架由一矩形框和两个沿矩形框长度方向并列设置的支杆共同组成,两个所述支杆用于安装夹具。
  3. 根据权利要求1所述的护理床床板专用的焊接机器人变位机,其特征在于,所述驱动端总成上设有一动力输出块,所述第一绝缘构件固接于所述输出块上,所述托架靠近所述驱动端总成的位置固接于所述第一绝缘构件上。
  4. 根据权利要求3所述的护理床床板专用的焊接机器人变位机,其特征在于,所述第一绝缘构件包括设在所述托架与所述输出块之间的第一绝缘板,所述托架上背离所述第一绝缘板的表面上设有第一压块,所述输出块背离所述托架的表面上设有第二压块,所述第一压块和所述第二压块之间通过若干第一销杆连接,且所述第一销杆贯穿所述托架、所述第一绝缘板以及所述输出块,所述第一销杆与所述输出块之间通过第一绝缘套连接。
  5. 根据权利要求3所述的护理床床板专用的焊接机器人变位机,其特征在于,所述输出块与所述第二压块之间设有第二绝缘板。
  6. 根据权利要求3所述的护理床床板专用的焊接机器人变位机,其特征在于,所述驱动端总成由光学编码器、电磁刹车、伺服电机以及RV减速机共同组成,光学编码器与焊接机器人电连接,RV减速机的输出轴与所述输出块固接。
  7. 根据权利要求1所述的护理床床板专用的焊接机器人变位机,其特征在于,所述自由端总成包括与所述托架固接的托块,以及转动设于所述托块上的活动轴,所述活动轴通过轴承座与所述第二绝缘构件连接,所述活动轴上设有一导电接头与焊接单元连接。
  8. 根据权利要求7所述的护理床床板专用的焊接机器人变位机,其特征在于,所述第二绝缘构件包括一设在所述轴承座与所述机座之间的第三绝缘板,所述第三绝缘板通过若干第二销杆连接于轴承座以及所述机座,所述第二销杆与轴承座之间通过第二绝缘套连接。
  9. 根据权利要求7所述的护理床床板专用的焊接机器人变位机,其特征在于,所述托架的转动中心轴线、所述活动轴的轴线与所述RV减速机的动力输出轴线重合。
  10. 根据权利要求2所述的护理床床板专用的焊接机器人变位机,其特征在于,所述托架由与第一绝缘构件固接的壳体以及可以在宽度方向伸缩变化的矩形框组成,所述支杆为伸缩结构且可在所述矩形框的长度方向上滑动;
    所述矩形框的短边内设有第一锁定机构,未作业时,所述第一锁定机构将处于收缩状态的所述矩形框锁定,作业时,所述第一锁定机构将所述矩形框与所述壳体锁定。
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