Welding auxiliary positioning equipment for supporting and connecting piece of bed board of nursing bed

Abstract

The invention relates to the related technical field of metal welding equipment manufacturing, discloses welding auxiliary positioning equipment for a nursing bed board supporting and connecting piece, and aims to solve the problem that positioning is tedious due to the fact that bed boards are uniformly positioned and then welded, bed board longitudinal beams are positioned through vertical positioning frames, and bed board cross beams are positioned and supported through supporting wheels; during welding, the mechanical arm welding assembly welds connecting points of longitudinal beams and cross beams of a bed board, then the lifting driving assembly pushes the welded cross beams upwards according to the lifting support, then the next cross beam is placed on the supporting wheels again to be positioned and welded, and the aim of stepping feeding and welding of the cross beams is achieved by repeating the steps.

Description

Technical Field

[0001] This invention relates to the technical field of metal welding equipment manufacturing, and in particular to a welding auxiliary positioning device for a nursing bed board support connector. Background Technology

[0002] The welding of the nursing bed board support connectors primarily involves firmly linking the various components together to create a stable and sturdy overall frame for the bed board. This provides it with strong load-bearing capacity, enabling it to safely and reliably support the weight of patients of different body types and preventing accidental injuries caused by loosening or breakage of the bed board structure. Simultaneously, the welding process ensures the stability of the bed board structure. Even during long-term, frequent use and repeated lifting, lowering, and moving operations, it maintains its precise shape and dimensions without deformation or wobbling, providing stable and comfortable support for patients and ensuring the accuracy and safety of nursing procedures.

[0003] According to the search, the announcement number CN201950412U discloses a welding fixture for a CT bed board trolley, which includes: using multiple positioning devices to accurately position and fix the corresponding parts to be welded, and then using several clamping devices to clamp and fix the parts to be welded to avoid positional changes during the welding process, so as to accurately position the parts to be welded as a whole and improve the quality of the finished product.

[0004] Currently, the common practice in welding nursing bed panels is to first position all components uniformly before welding. This method does ensure precise positioning between the various parts of the bed panel to a certain extent, guaranteeing that the welded structure meets design requirements. However, due to the relatively large number of positioning mechanisms required, each panel needs to be connected and fixed individually during the positioning process. This not only increases the complexity and tediousness of the operation but also reduces welding efficiency, lengthens the overall production cycle, and increases production costs, thus hindering the improvement of nursing bed production efficiency to some extent. Summary of the Invention

[0005] This invention proposes a welding auxiliary positioning device for the connecting parts of the bed board support of a nursing bed, which has the advantages of step feeding welding, and solves the problem of cumbersome positioning caused by the unified positioning and welding of the bed board mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a welding auxiliary positioning device for a nursing bed board support connector, comprising: a base, a vertical positioning frame for positioning the longitudinal beams of the bed board fixedly mounted on its surface, and a support frame movably mounted on the side of the vertical positioning frame, and a support wheel for positioning the crossbeams movably mounted on the side of the support frame; a robotic arm welding assembly for welding the connection points of the longitudinal beams and the crossbeams; a lifting frame, which moves up and down along the side of the vertical positioning frame via a lifting drive assembly, and a movable cantilever extending under the control of a switching drive assembly is movably mounted on the side of the lifting frame; a lifting support is mounted on the surface of the movable cantilever; after the longitudinal beams and the crossbeams are welded, the lifting drive assembly pushes the lifting frame upward, and the lifting support on the movable cantilever pushes the welded crossbeam upward; after the next crossbeam is placed on the support wheel and welded again, the lifting support pushes the welded crossbeam upward again, thereby realizing the fixed-distance feeding and welding of multiple crossbeams.

[0007] Furthermore, positioning wheels are fixedly installed on the side of the vertical positioning frame.

[0008] Furthermore, an upper pressure plate is movably installed inside the vertical positioning frame, a hydraulic cylinder is fixedly installed on the top of the vertical positioning frame, and a lower piston rod that is fixedly connected to the upper pressure plate is movably fitted inside the bottom sealed part of the hydraulic cylinder. An upper piston rod is movably sealed in the middle of the hydraulic cylinder cavity, and a detection spring is provided between the upper piston rod and the top of the hydraulic cylinder cavity. Liquid medium is injected into the hydraulic cylinder cavity.

[0009] Furthermore, a stepped surface is provided on the inner side of the hydraulic cylinder body.

[0010] Furthermore, a return oil pipe is fixedly connected to the top of the outer side of the hydraulic cylinder body, and the return oil pipe is connected to the oil tank; a one-way oil inlet pipe is fixedly connected to the middle of the outer side of the hydraulic cylinder body, and the one-way oil inlet pipe is connected to the oil pump in the oil tank through a fitting.

[0011] Furthermore, a downward pressure wheel frame is movably installed on the side of the movable cantilever. By adjusting the distance between the downward pressure wheel frame and the top of the lifting support, the distance between the crossbeams to be welded can be adjusted.

[0012] Furthermore, the support wheel is movably mounted to the side of the support frame using a dovetail seat, and a lifting spring is provided between the support frame and the support wheel. A positioning detection component is fixedly installed on the top of the dovetail seat.

[0013] Furthermore, there are two support wheels, and the pressure wheel frame is located on one side of the support wheels.

[0014] Furthermore, by controlling the extension length of the lifting drive component, the distance between the crossbeams can be adjusted.

[0015] The present invention has the following beneficial effects:

[0016] This invention provides a welding auxiliary positioning device for a nursing bed board support connector. It utilizes a vertical positioning frame to position the longitudinal beams of the bed board; simultaneously, it uses support wheels to position and support the transverse beams of the bed board in the horizontal direction. Subsequently, a robotic arm welding assembly positions the intersection point of the longitudinal and transverse beams and performs the welding operation.

[0017] After one welding operation is completed, the lifting drive assembly raises the welded crossbeam a certain distance via the lifting support, making room for the new crossbeam to be welded. The next crossbeam is then placed on the support wheel, and the above positioning and welding steps are repeated to achieve continuous stepping feeding and welding of the crossbeams. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention.

[0019] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0020] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the front of each component on the base of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the back of each component on the base of the present invention;

[0023] Figure 4 This is a schematic diagram showing the position and three-dimensional structure of each component on the support frame of the present invention;

[0024] Figure 5 This is a schematic diagram showing the position and three-dimensional structure of each component on the lifting frame of the present invention;

[0025] Figure 6 This is a schematic diagram showing the location and three-dimensional structure of the internal components of the hydraulic cylinder of the present invention;

[0026] Figure 7 This is a simplified schematic diagram of the welding process between the bed board and the support plate of the present invention;

[0027] Figure 8 This is a schematic diagram showing the state of the support plate of the present invention before and after being pressed by the lower pressure wheel frame when the size of the support plate is too short.

[0028] In the diagram: 1. Robotic arm welding assembly; 2. Base; 201. Vertical positioning frame; 202. Positioning wheel; 3. Lifting frame; 301. Lifting drive assembly; 4. Movable cantilever; 401. Switching drive assembly; 5. Lifting support; 6. Lower pressure wheel frame; 7. Support frame; 701. Lifting spring; 8. Support wheel; 9. Hydraulic cylinder body; 901. Lower piston rod; 902. One-way oil inlet pipe; 903. Upper piston rod; 904. Detection spring; 905. Return oil pipe; 10. Upper pressure plate; 11. Position detection assembly. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1, please refer to Figures 1-3 It can be seen that the base 2 can be fixedly installed in the required position using the pre-drilled bolt holes. Two vertical positioning frames 201 are fixedly installed on the surface of the base 2 to position the longitudinal beam of the bed board. Each vertical positioning frame 201 has a positioning wheel 202 fixedly installed on its side. In this application, the longitudinal beam of the bed board is L-shaped. After being placed inside the vertical positioning frame 201 and positioned and restricted by the positioning wheel 202, the longitudinal beam can only move up and down vertically along the vertical direction of the vertical positioning frame 201. Figure 3 As shown, the vertical positioning frame 201 has a support frame 7 that is vertically movable using guide rails on its side. Once the support frame 7 is adjusted to the required height, it can be locked in place using bolts. Support wheels 8 are movably mounted on the side of the support frame 7. Figure 4 It can be seen that the support wheel 8 is equipped with a frustum-shaped wheel. When the bed board crossbeam is placed on the support wheel 8, the side of the crossbeam is restricted by the frustum at the top of the support wheel 8, and both ends of the crossbeam abut against the inner side of the corresponding longitudinal beam, thereby completing the positioning between the bed board crossbeam and the longitudinal beam. A robotic arm welding assembly 1 is provided on one side of the base 2. The robotic arm welding assembly 1 can be used to weld the connection points between the bed board longitudinal beam and the crossbeam, thereby ensuring a stable connection between the longitudinal beam and the crossbeam.

[0031] A lifting frame 3, which moves up and down along a guide rail, is movably mounted on the side of the vertical positioning frame 201. Figure 3 and Figure 5As can be seen, a lifting drive assembly 301 for driving the lifting frame 3 to move up and down is fixedly installed on the surface of the base 2. The lifting drive assembly 301 includes, but is not limited to, a cylinder or hydraulic cylinder, etc., and only needs to ensure that the lifting drive assembly 301 can control the lifting frame 3 to move up and down along the guide rail. A movable cantilever 4 is movably installed on the side of the lifting frame 3. The movable cantilever 4 is U-shaped, and a switching drive assembly 401 is fixedly installed on the side of the lifting frame 3. The switching drive assembly 401 can be used to move the movable cantilever 4 along the side of the lifting frame 3. A lifting support 5 is bolted to the surface of the movable cantilever 4, and the top of the lifting support 5 is L-shaped, which is used to support the crossbeam.

[0032] In practical application of this embodiment, the longitudinal beam of the bed board is positioned in the vertical positioning frame 201. The lifting drive assembly 301 drives the lifting frame 3 downward, and the switching drive assembly 401 pushes out the movable cantilever 4. At this time, the top of the lifting support 5 is relatively lower than the support wheel 8.

[0033] The bed frame crossbeam is positioned above the support wheels 8, with both ends of the crossbeam attached to the longitudinal beams on both sides. The connection points between the longitudinal and crossbeams are welded using the robotic arm welding assembly 1. Then, the lifting drive assembly 301 pushes the lifting frame 3 upwards, which in turn pushes the movable cantilever 4 upwards. This causes the lifting support 5 on the movable cantilever 4 to push the crossbeam upwards, allowing the welded crossbeam to move the longitudinal beams upwards along the vertical positioning frame 201. During this upward movement, the crossbeam disengages from the support wheels 8.

[0034] The new crossbeam is placed back onto the support wheel 8 using a robotic arm, and then welded again using the robotic arm welding assembly 1. After welding, the switching drive assembly 401 pulls the support wheel 8 out from the bottom of the crossbeam, and the lifting drive assembly 301 drives the lifting frame 3 downward, moving the lifting support 5 below the support wheel 8. Then, the switching drive assembly 401 extends the lifting support 5 again, and as the lifting drive assembly 301 pushes the lifting frame 3 upward again, the lifting support 5 pushes the crossbeam upward once more.

[0035] Finally, the crossbeam is placed back on the support wheel 8, and the process is repeated in the same way to achieve continuous step feeding and welding of the bed board crossbeam.

[0036] Example 2 is a further improvement on Example 1. Please refer to Example 1. Figures 1-3 and Figure 6 It can be seen that an upper pressure plate 10 is movably installed on the inner side of the vertical positioning frame 201, and the upper pressure plate 10 can only move up and down along the inner wall of the vertical positioning frame 201. A hydraulic cylinder 9 is fixedly installed on the top of the vertical positioning frame 201, and a lower piston rod 901, which is fixedly connected to the upper pressure plate 10, is movably and sealed at the bottom of the hydraulic cylinder 9. Figure 6As shown, the hydraulic cylinder body 9 has a stepped surface on its inner side. An upper piston rod 903, located on the stepped surface, is movably sealed in the middle of the inner cavity of the hydraulic cylinder body 9. A detection spring 904 is installed between the upper piston rod 903 and the top of the inner side of the hydraulic cylinder body 9. Pushed downwards by the spring, the upper piston rod 903 is forced to always tend to push downwards. During application, sufficient liquid medium, preferably lubricating oil, is injected into the inner cavity of the hydraulic cylinder body 9. The input and output of the medium are controlled by... Figure 6 As can be seen, a return oil pipe 905 is fixedly connected to the top of the outer side of the hydraulic cylinder body 9, and the return oil pipe 905 is generally connected to the oil tank. A one-way oil inlet pipe 902 is fixedly connected to the middle of the outer side of the hydraulic cylinder body 9, and the one-way oil inlet pipe 902 is connected to the oil pump in the oil tank via a fitting. After the oil pump starts, the medium in the oil tank will be input into the inner cavity of the hydraulic cylinder body 9. When there is too much hydraulic oil in the inner cavity of the hydraulic cylinder body 9, the excess medium will flow back to the oil tank through the return oil pipe 905.

[0037] In practical application of this second embodiment, after the longitudinal beam is placed on the vertical positioning frame 201, the medium is input into the hydraulic cylinder 9 using an oil pump. At this time, the medium inside the hydraulic cylinder 9 will preferentially push the upper pressure plate 10 downwards using the lower piston rod 901 until the upper pressure plate 10 abuts against the top of the longitudinal beam. As the medium is continuously input into the hydraulic cylinder 9, the upper piston rod 903 moves upwards under the influence of the medium pressure and compresses the detection spring 904 until the upper piston rod 903 crosses the stepped surface inside the hydraulic cylinder 9. Then, the excess medium inside the hydraulic cylinder 9 returns through the return oil pipe 905, and finally, the oil pump stops working. Thus, the upward compression and limiting of the longitudinal beam is completed.

[0038] Following the method described in Embodiment 1, after the crossbeam is positioned and welded, the lifting support 5 pushes the crossbeam upward. As the crossbeam pushes the upper pressure plate 10 upward via the longitudinal beam, the upper pressure plate 10 pushes the lower piston rod 901 to further compress the medium inside the hydraulic cylinder 9, forcing the upper piston rod 903 upward and over the step surface again. Thus, by using the lifting support 5 to push the crossbeam upward, and the upper pressure plate 10 to push the longitudinal beam downward, the connection point between the crossbeam and the longitudinal beam is compressed, thereby enabling the detection of the weld's firmness.

[0039] Furthermore, as described in Embodiment 1, with the increase in the number of welded crossbeams, the height to which the crossbeams push the longitudinal beams upward also increases relatively. The key point is that when the upper pressure plate 10 pushes the lower piston rod 901 upward, after the upper piston rod 903 crosses the step surface, excess medium will flow back into the oil tank from the return oil pipe 905. Therefore, as the longitudinal beams continue to move upward, the detection spring 904 will not be further compressed. It is well known that the strength of a spring increases with the amount of compression. In this Embodiment 2, the medium is used for intermediate transmission to ensure that excess medium is discharged during the upward movement of the lower piston rod 901. Therefore, the strength required to open the upper piston rod 903 each time is relatively constant. Using this method, during the upward movement of the longitudinal beams by the lifting support 5 via the crossbeams, the detection force at the connection points between the crossbeams and longitudinal beams at different positions is similar.

[0040] Example 3 is a further improvement on Example 2. In order to ensure that the distance of the crossbeam moving upward is always constant, the first method is to control the maximum extension length of the lifting drive component 301, thereby ensuring that the stroke of the lifting drive component 301 pushing the lifting frame 3 upward is consistent, and realizing the fixed-distance feeding of the crossbeam.

[0041] The second method, from Figure 2 and Figure 5 It can be seen that a downward pressure wheel bracket 6 is movably mounted on the side of the movable cantilever 4, and after the height of the downward pressure wheel bracket 6 is adjusted, it is locked onto the movable cantilever 4 with bolts. Figure 7 As shown, after the lifting support 5 pushes the welded crossbeam upwards, the crossbeam is placed back onto the support wheel 8. Then, as the lower piston rod 901 pushes the upper pressure plate 10 downwards, the lifting support 5 pushes the movable cantilever 4 downwards synchronously. During the downward movement of the movable cantilever 4 and the lower pressure wheel frame 6, the lower pressure wheel frame 6 eventually abuts against the crossbeam. The hydraulic cylinder 9 presses the crossbeam, ensuring further pressing and limiting of the crossbeam. Furthermore, the distance between the lower pressure wheel frame 6 and the top of the lifting support 5 ensures that the distance between the two crossbeams is consistent. This cycle ensures that the distance between the crossbeams is fixed, and the distance between the crossbeams can be adjusted according to the change in the extension height of the lower pressure wheel frame 6.

[0042] Based on this, combined Figure 3 and Figure 4It can be seen that the support wheel 8 is movably mounted to the side of the support frame 7 using a dovetail seat, and a lifting spring 701 is provided between the support frame 7 and the support wheel 8. Under normal conditions, the spring pushes the lifting spring 701, causing it to tend to push the support wheel 8 upward until the lifting spring 701 is in a free extension state. A positioning detection component 11 is fixedly installed on the top of the dovetail seat on the support wheel 8. The positioning detection component 11 is such as a switch or sensor. When the positioning detection component 11 reaches the top of the support frame 7, it indicates that the support wheel 8 has moved to the correct position. In actual application, since the elastic force of the lifting spring 701 is relatively smaller than that of the lower piston rod 901, when the upper pressure plate 10 pushes the longitudinal beam downward, the crossbeam presses down the lifting support 5 to make the lifting frame 3 move downward. After the lower pressure wheel frame 6 is attached to the crossbeam on the support wheel 8, the lower pressure wheel frame 6 pushes the crossbeam to move further downward. After the crossbeam pushes the support wheel 8 to the correct position, the positioning detection component 11 will input a signal to the control system to ensure that the crossbeam is in place. Conversely, the beam is not in place.

[0043] There are several possible interpretations for the failure of the positioning detection component 11 to send a signal. First, the crossbeam may not be in place. Alternatively, if the seal between the upper piston rod 903 or the lower piston rod 901 fails after prolonged use, the pressure inside the hydraulic cylinder 9 will not increase. This would prevent the upper pressure plate 10 from pressing down on the longitudinal beam, and there would be insufficient strength to force the support wheel 8 downward and compress the lifting spring 701. Therefore, it can be roughly determined whether there are problems such as sealing failure in the internal components of the hydraulic cylinder 9.

[0044] Moreover, from Figure 4 and Figure 8 It can be seen that there are two support wheels 8, and the lower pressure wheel frame 6 is located on one side of the support wheel 8. The advantage of this arrangement is that, for reference... Figure 8 As shown, the crossbar is initially positioned, denoted as T0, and is horizontally arranged with both ends abutting the inner side of the longitudinal beam. If the length of the crossbar is consistent with the spacing between the longitudinal beams, during the downward pressing of the pressure roller 6, the pressure roller 6 will push the crossbar downward synchronously until both positioning detection components 11 on the support roller 8 are fully engaged, indicating that the length of the crossbar is accurate and the placement is precise.

[0045] Conversely, if the length of the crossbeam is shortened, when one end of the lower pressure wheel frame 6 is pressed down, the crossbeam will deflect clockwise around the support wheel 8 near the lower pressure wheel frame 6 as a fulcrum. Figure 8 As shown in state T1, only the positioning detection component 11 on one support wheel 8 will be activated when the crossbeam moves downwards. This signal is used to determine if the crossbeam is too short to be properly positioned. More specifically, as... Figure 1As shown, an alarm light can be installed on the top of the vertical positioning frame 201. When only one support wheel 8 is engaged, the alarm light flashes to warn the operator that there is a problem with the dimensions of the beam in that part and that it needs to be inspected.

Claims

1. A welding assist positioning apparatus for a care bed deck support connection, characterized by, The base (2) is fixedly installed with vertical positioning frames (201) for positioning the longitudinal beams of the bed plate, and the side of the vertical positioning frames (201) is movably installed with support frames (7), and the side of the support frames (7) is movably installed with support wheels (8) for positioning the cross beams; The mechanical arm welding assembly (1) is used for welding the connecting points of the longitudinal beams and the cross beams; The lifting frame (3) moves up and down along the side of the vertical positioning frames (201) through the lifting driving assembly (301), and the lifting frame (3) is movably installed with movable cantilevers (4) controlled to extend by the switching driving assembly (401); the movable cantilevers (4) are installed with lifting supports (5) on the surface. After the longitudinal beams and the cross beams are welded, the lifting driving assembly (301) pushes the lifting frame (3) to move upwards, the lifting supports (5) on the movable cantilevers (4) push the cross frames that have been welded upwards, after the next cross frame is placed on the support wheels (8) and welded again, the lifting supports (5) are used to push the welded cross frames upwards again, so that the multiple cross frames are fed and welded at a distance. The side of the vertical positioning frames (201) is fixedly installed with positioning wheels (202).

2. The weld assist positioning device for a care bed deck support connection of claim 1, wherein, The inside of the vertical positioning frames (201) is movably installed with upper pressing plates (10), the top of the vertical positioning frames (201) is fixedly installed with hydraulic cylinder bodies (9), the inside of the hydraulic cylinder bodies (9) is movably and sealingly installed with lower piston rods (901) fixedly connected with the upper pressing plates (10), the inside of the hydraulic cylinder bodies (9) is movably and sealingly installed with upper piston rods (903), the upper piston rods (903) and the inside of the hydraulic cylinder bodies (9) are provided with detection springs (904) at the top end, and the inside of the hydraulic cylinder bodies (9) is injected with liquid medium.

3. The weld assist positioning device for a care bed deck support connection of claim 1, wherein, The inside of the hydraulic cylinder bodies (9) is provided with a stepped surface.

4. The weld assist positioning device for a care bed deck support connection of claim 3, wherein, The top of the outside of the hydraulic cylinder bodies (9) is fixedly and continuously installed with an oil return pipe (905) in communication with an oil tank; the middle of the outside of the hydraulic cylinder bodies (9) is fixedly and continuously installed with a one-way oil inlet pipe (902) connected with an oil pump in the oil tank by a pipe fitting.

5. The weld assist positioning device for a care bed deck support connection of claim 3, wherein, The side of the movable cantilevers (4) is movably installed with lower pressing wheel frames (6), the distance between the lower pressing wheel frames (6) and the top of the lifting supports (5) is adjusted, and the distance between the cross beams to be welded is adjusted.

6. The weld assist positioning device for a care bed deck support connection of claim 4, wherein, The support wheels (8) are movably installed on the side of the support frames (7) by dovetail seats, and the support frames (7) and the support wheels (8) are provided with jacking springs (701), and the top of the dovetail seats is fixedly installed with a position detection assembly (11).

7. The weld assist positioning device for a care bed deck support connection of claim 6, wherein, The number of the support wheels (8) is two, and the lower pressing wheel frames (6) are located on one side of the support wheels (8).

8. The weld assist positioning device for a care bed deck support connection of claim 7, wherein, The extension length of the lifting driving assembly (301) is controlled, and the distance between the cross beams is adjusted.

9. The weld assist positioning device for a care bed deck support connection of claim 1, wherein, ​

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