Lifting device and method for workpiece discharging trolley of welding workshop and welding workshop

Abstract

The invention belongs to the technical field of lifting storage positions, and provides a lifting device and method for a workpiece discharging trolley in a welding workshop and the welding workshop, the lifting device comprises two racks arranged in a mirror image mode, and lifting mechanisms, positioning mechanisms, locking mechanisms and guiding mechanisms which are arranged on the racks; the workpiece discharging trolley can be lifted according to the robot after height lifting, the requirement for the operation range of the robot is lowered, and the operation range of a welding workshop is guaranteed; meanwhile, through the arrangement of a positioning mechanism, a locking mechanism and a guiding mechanism, guiding and locking of the workpiece discharging trolley are achieved, the stability of the workpiece discharging trolley in the lifting process is guaranteed, the lifting distance of the workpiece discharging trolley is determined through a first proximity switch and a second proximity switch, and therefore the workpiece discharging trolley is more stable. And the locking position needed by the workpiece discharging trolley is determined through the third proximity switch, the locking device can be tightly combined with the operation process of a welding workshop, and the operation efficiency and safety are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of lifting storage positions, and in particular relates to a lifting device and method for a workpiece unloading trolley in a welding workshop, and a welding workshop. Background Art

[0002] In the welding workshop, there are requirements for the height of steel structures when unloading parts, and the robot needs to meet the height requirements. Therefore, it is necessary to increase the height of the robot base and other methods to make the robot height meet the requirements; after the height of the robot is increased, if the robot is used to place the steel structure onto the unloading trolley, the height of the trolley must also be increased, and the height of the trolley can only be met by lifting.

[0003] At present, there is no device for lifting the unloading trolley in the welding workshop, which makes high requirements on the operating range of the robot and limits the operation scope of the welding workshop; if the unloading trolley is lifted by a conventional lifting device, there are problems such as instability of the unloading trolley during the lifting process, which may easily cause rollover, and the judgment and control process of the lifting distance, movement and position of the unloading trolley are all achieved through experience, which is not closely integrated with the operation process of the welding workshop, affecting the efficiency and safety of the operation. Summary of the invention

[0004] In order to solve the above-mentioned problem, the present invention proposes a lifting device, method and welding workshop for a lower part trolley in a welding workshop. Through the lifting mechanism, the lower part trolley can be lifted according to the robot after the height is lifted; at the same time, through the provided positioning mechanism, locking mechanism and guiding mechanism, the lower part trolley is guided and locked, thereby ensuring the stability of the lower part trolley during the lifting process, and the lifting distance of the lower part trolley is determined by the first proximity switch and the second proximity switch, and the required locking position of the lower part trolley is determined by the third proximity switch, which can be closely integrated with the operation process of the welding workshop to ensure operation efficiency and safety.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present invention provides a lifting device for a trolley for unloading parts in a welding workshop, which adopts the following technical scheme:

[0006] A lifting device for a workpiece unloading trolley in a welding workshop, comprising two frames arranged in a mirror image, and a lifting mechanism, a positioning mechanism, a locking mechanism and a guiding mechanism arranged on each frame;

[0007] The guide mechanism is arranged on the frame through the lifting mechanism, and the positioning mechanism and the locking mechanism are respectively arranged at two ends of the guide mechanism;

[0008] The lifting mechanism includes a first proximity switch and a second proximity switch, and the positioning mechanism is provided with a third proximity switch; the lifting distance of the unloading trolley is determined according to the first proximity switch and the second proximity switch, and the required locking position of the unloading trolley is determined by the third proximity switch.

[0009] Furthermore, the frame includes a base, vertical beams vertically arranged at both ends of the base, and a horizontal beam arranged at one end of the vertical beam away from the base.

[0010] Furthermore, a first slide groove is provided on the vertical beam; the lifting mechanism includes a cylinder arranged on the base, a moving beam arranged on the cylinder, sprockets arranged at both ends of the moving beam, and a chain arranged on the sprocket; the two ends of the moving beam are respectively slidably connected to the first slide groove through a first slider; one end of the chain is fixed on the moving beam, and the other end is connected to the guide mechanism after passing around the sprocket.

[0011] Furthermore, the lifting mechanism also includes a pulley arranged on the vertical beam, and a steel wire arranged on the pulley.

[0012] Furthermore, the pulley includes a first pulley and a second pulley at both ends of a vertical beam, and a third pulley and a fourth pulley at both ends of another vertical beam in two frames that are respectively arranged in a mirror-image manner; the steel wire includes a first steel wire and a second steel wire; one end of the first steel wire is fixed to one of the guide mechanisms, and the other end is fixed to the other guide mechanism after passing through the first pulley and the second pulley respectively; one end of the second steel wire is fixed to one of the guide mechanisms, and the other end is fixed to the other guide mechanism after passing through the third pulley and the fourth pulley respectively.

[0013] Furthermore, the first proximity switch and the second proximity switch are respectively arranged at different positions of the vertical beam; and a tank chain is arranged between the vertical beam and the locking mechanism.

[0014] Furthermore, the positioning mechanism also includes a buffer, a photoelectric switch and a pin hole; the photoelectric switch is used to detect the steel structure condition on the unloading trolley.

[0015] Furthermore, a second slide groove is provided on the vertical beam; the guide mechanism includes a track, and a guide block and a limit block arranged at one end of the track, and an inclined portion is arranged at one end of the guide block away from the track; the track is slidably connected to the second slide groove through a second slider;

[0016] The locking mechanism is arranged at one end of the track located at the guide block, and the locking mechanism comprises a block driving source and a block arranged on the driving source.

[0017] In order to achieve the above-mentioned purpose, in a second aspect, the present invention also provides a lifting method for a welding workshop unloading trolley, which adopts the following technical scheme:

[0018] A lifting method for a welding workshop trolley, using the lifting device for a welding workshop trolley as described in the first aspect, comprising: pushing the trolley onto the guide mechanism, positioning the trolley by the positioning mechanism; locking the trolley by the locking mechanism when the third proximity switch detects the trolley;

[0019] The guide mechanism is lifted by the lifting mechanism to drive the unloading trolley to rise, and when the first proximity switch detects the unloading trolley, the lifting mechanism works;

[0020] After the robot assembles the steel structure on the lower part trolley, the guide mechanism is lowered through the lifting mechanism to drive the lower part trolley to descend. When the second proximity switch detects the lower part trolley, the lifting mechanism works and the locking mechanism opens.

[0021] In order to achieve the above-mentioned purpose, in a third aspect, the present invention also provides a welding workshop, which adopts the following technical solution:

[0022] A welding workshop is provided with a lifting device for a welding workshop unloading trolley as described in the first aspect.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention designs a storage location with a lifting mechanism, which can lift the unloading trolley according to the robot after the height is lifted, thereby reducing the requirements on the operating range of the robot and ensuring the operation scope of the welding workshop; at the same time, through the provided positioning mechanism, locking mechanism and guiding mechanism, the unloading trolley is guided and locked, thereby ensuring the stability of the unloading trolley during the lifting process, and the lifting distance of the unloading trolley is determined by the first proximity switch and the second proximity switch, and the required locking position of the unloading trolley is determined by the third proximity switch, which can be closely integrated with the operation process of the welding workshop and ensure the operation efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of a rack according to Embodiment 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of the steel wire arrangement of Example 1 of the present invention;

[0029] Figure 4 This is a schematic diagram of a positioning mechanism according to Embodiment 1 of the present invention;

[0030] Figure 5 This is a schematic diagram of a locking mechanism according to Embodiment 1 of the present invention;

[0031] Among them, 1, frame; 101, base; 102, vertical beam; 1021, first slide; 1022, second slide; 103, cross beam; 2, lifting mechanism; 201, cylinder; 202, moving beam; 203, first slider; 204, sprocket; 205, chain; 206, pulley; 2061, first pulley; 2062, second pulley; 2063, third pulley; 2064, fourth pulley; 207, steel wire; 2071, first steel wire; 207 2. Second steel wire; 208. First proximity switch; 209. Second proximity switch; 210. Tank chain; 211 Protective cover; 3. Positioning mechanism; 301. Buffer; 302. Third proximity switch; 303. Photoelectric switch; 304. Pin hole; 4. Locking mechanism; 401. Block driving source; 402. Block; 5. Guide mechanism; 501. Track; 502. Guide block; 503. Limit block; 504. Second slider; 6. Valve island; 7. Single valve group. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0034] Embodiment 1:

[0035] like Figure 1 and Figure 2 As shown, this embodiment provides a lifting device for a workpiece unloading trolley in a welding workshop, comprising two frames 1 arranged in a mirror image, and a lifting mechanism 2, a positioning mechanism 3, a locking mechanism 4, a guide mechanism 5, a valve island 6 and a single valve group 7 arranged on each frame 1;

[0036] Optionally, the guide mechanism 5 is arranged on the frame 1 through the lifting mechanism 2, and the positioning mechanism 3 and the locking mechanism 4 are respectively arranged at two ends of the guide mechanism 5;

[0037] The lifting mechanism 2 includes a first proximity switch 208 and a second proximity switch 209, and the positioning mechanism 3 is provided with a third proximity switch 302; the lifting distance of the unloading trolley is determined according to the first proximity switch 208 and the second proximity switch 209, and the required locking position of the unloading trolley is determined by the third proximity switch 302.

[0038] It is understandable that the unloading trolley can be implemented by a conventional material transport trolley, etc.; two mirror-imaged guide mechanisms 5 guide the wheels on both sides of the unloading trolley respectively; and two mirror-imaged positioning mechanisms 3 and two mirror-imaged locking mechanisms 4 position and lock the two sides of the unloading trolley respectively. Specifically, through the lifting mechanism 2, the unloading trolley can be lifted according to the robot after the height is lifted, which reduces the requirements for the robot's operating range and ensures the operating scope of the welding workshop; at the same time, through the positioning mechanism 3, the locking mechanism 4 and the guiding mechanism 5, the unloading trolley is guided and locked, ensuring the stability of the unloading trolley during the lifting process, and the lifting distance of the unloading trolley is determined by the first proximity switch 208 and the second proximity switch 209, and the required locking position of the unloading trolley is determined by the third proximity switch 302, which can be closely integrated with the operating process of the welding workshop to ensure operating efficiency and safety.

[0039] like Figure 1 and Figure 2 As shown, the frame 1 includes a base 101, vertical beams 102 vertically arranged at both ends of the base 101, and a horizontal beam 103 arranged at one end of the vertical beam 102 away from the base 101. A first slide groove 1021 and a second slide groove 1022 are respectively provided on two different sides of the vertical beam 102;

[0040] Optionally, the base 101 may be configured as a steel plate or other structure, and the vertical beam 102 and the horizontal beam 103 may be configured as square steel or other structure. The base 101 and the vertical beam 102, and the vertical beam 102 and the horizontal beam 103 may be connected by welding or bolts.

[0041] like Figure 2 The lifting mechanism 2 includes a cylinder 201 arranged on the base 101, a moving beam 202 arranged on the cylinder 201, sprockets 204 arranged at both ends of the moving beam 202, a protective cover 211 arranged on the sprocket 204, and a chain 205 arranged on the sprocket 204; the two ends of the moving beam 202 are slidably connected to the first slide groove 1021 through a first slider 203 respectively; one end of the chain 205 is fixed on the moving beam 202, and the other end is connected to the guide mechanism 5 after passing through the sprocket 204.

[0042] Optionally, the cylinder 201 is a locked cylinder to ensure that the lower trolley does not fall when it stops at the rising position after the gas is cut off, and the protective cover 211 can prevent the sprocket 204 from accidentally injuring workers when it suddenly rotates. The bottom end of the cylinder 201 is set on the base 101 by bolts or the like; the moving beam 202 can be made of square steel or steel plate and is set on the telescopic rod of the cylinder 201 by bolts or the like.

[0043] Specifically, when the guide mechanism 5 needs to lift or lower the lower trolley, the cylinder 201 lifts or lowers the movable beam 202. At this time, the sprocket 204 rotates, driving the chain 205 to move relative to the sprocket 204, thereby driving the guide mechanism 5 to lift, or the guide mechanism 5 to lower under the action of gravity. The structure of the lifting mechanism 2 in this embodiment enables the guide mechanism 5 and the lower trolley to have good stability during the lifting process.

[0044] like Figure 2 and Figure 3 As shown, the lifting mechanism 2 further includes a pulley 206 arranged on the vertical beam 102, and a steel wire 207 arranged on the pulley 206. Optionally, the pulley 206 includes a first pulley 2061 and a second pulley 2062 at both ends of one vertical beam 102, and a third pulley 2063 and a fourth pulley 2064 at both ends of the other vertical beam 102, respectively arranged in two mirror-imaged frames 1; the steel wire 207 includes a first steel wire 2071 and a second steel wire 2072; one end of the first steel wire 2071 is fixed to one of the guide mechanisms 5, and the other end is fixed to the other guide mechanism 5 after passing through the first pulley 2061 and the second pulley 2062 respectively; one end of the second steel wire 2072 is fixed to one of the guide mechanisms 5, and the other end is fixed to the other guide mechanism 5 after passing through the third pulley 2063 and the fourth pulley 2064 respectively.

[0045] Specifically, when the guide mechanism 5 rises, one end of the first steel wire 2071 rises, and the remaining amount of the first steel wire 2071 passes through the first pulley 2061 and the second pulley 2062, and is transferred to the other end of the first steel wire 2071, meeting the rising demand of the other guide mechanism 5, and the rising distances of the two guide mechanisms 5 are limited by the remaining amount of the steel wire, and the rising distances are equal; at this time, one end of the second steel wire 2072 rises, and the remaining amount of the second steel wire 2072 passes through the fourth pulley 2064 and the third pulley 2063, and is transferred to the other end of the second steel wire 2072. Similarly, when the guide mechanism 5 descends, one end of the first steel wire 2071 descends, and the excess of the first steel wire 2071 passes through the first pulley 2061 and the second pulley 2062, and is transferred to the other end of the first steel wire 2071, meeting the rising demand of the other guide mechanism 5, and the descending distances of the two guide mechanisms 5 are limited by the excess of the steel wire, and the descending distances are equal; at this time, one end of the second steel wire 2072 descends, and the excess of the second steel wire 2072 passes through the fourth pulley 2064 and the third pulley 2063, and is transferred to the other end of the second steel wire 2072.

[0046] like Figure 1 As shown, in this embodiment, the first proximity switch 208 and the second proximity switch 209 are respectively arranged at different positions of the vertical beam 102; a tank chain 210 is arranged between the vertical beam 102 and the locking mechanism 4.

[0047] Specifically, when the guide mechanism 5 rises to the second proximity switch 209, it means that it has risen to the highest position, and the requirement for unloading is met, and the rise is stopped; similarly, when the guide mechanism 5 descends to the first proximity switch 208, it means that it has descended to the lowest position, and the requirement for unloading the trolley is met, and the descent is stopped. One end of the tank chain 210 is connected to the dead mechanism 4, and the other end is connected to the vertical beam 102, which improves the connection strength and flexibility.

[0048] like Figure 4As shown, the positioning mechanism 3 also includes a buffer 301, a photoelectric switch 303 and a pin hole 304; the photoelectric switch 303 is used to detect the steel structure on the unloading trolley. Optionally, the buffer 301 can adopt a buffer structure with a spring and a shaft, etc.; the photoelectric switch 303 can adopt an image recognition device or a laser device, etc. Specifically, a pin shaft is welded at the front end of the unloading trolley. When the front end of the unloading trolley moves to the positioning mechanism 3, the pin shaft is inserted into the pin hole 304 to preliminarily position the unloading trolley; when the unloading trolley and the buffer 301, the buffer 301 buffers the unloading trolley to avoid collision with the positioning mechanism 3; after the third proximity switch 302 recognizes the unloading trolley, it controls the locking mechanism 4 to lock the trolley with the help of control, etc.

[0049] like Figure 1 , Figure 2 and Figure 5 As shown, the guide mechanism 5 includes a track 501, and a guide block 502 and a limit block 503 arranged at one end of the track 501, and the guide block 502 is provided with an inclined portion at the end away from the track 501 to guide the wheels of the unloading trolley; the track 501 is slidably connected to the second slide groove 1022 through a second slider 504; the locking mechanism 4 is arranged at one end of the track 501 located at the guide block 502, and the locking mechanism 4 includes a block driving source 401, and a block 402 arranged on the driving source 401.

[0050] Specifically, the wheels on both sides of the lower piece trolley enter the track 501 along the guide block 502 and the limit block 503; when locking is required, the block driving source 401 drives the block 402 to rotate outward to block the rear end of the lower piece trolley for locking. The block driving source 401 can adopt a motor or other structure.

[0051] It can be understood that the cylinder 201, the first proximity switch 208, the second proximity switch 209, the third proximity switch 302, the photoelectric switch 303, the block drive source 401, the valve island 6 and the single valve group 7 in this embodiment are all connected to the controller, and the controller has functions such as issuing processing and generating control instructions.

[0052] One of the working principles or processes of this embodiment is:

[0053] The lifting mechanism 2 is in the descending position at the position of the first proximity switch 208. The first proximity switch 208 has a signal. The worker pushes the unloading trolley into the storage position through the guide mechanism 5. After it is pushed to a certain position, it slowly moves into place under the action of the buffer 301. The pin shaft on the buffer is inserted into the pin hole 304 to control the left and right direction position. The unloading trolley reaches the third proximity switch 302. The third proximity switch 302 receives a signal, the valve island 6 is ventilated, and the locking mechanism 4 is activated. After the worker retreats to the safe area, he presses the button, the single valve 7 is ventilated, and the cylinder 201 extends and rotates through the sprocket 204. The chain 205 and the tank chain 210 are driven to rise, wherein the pulley 206 and the steel wire 207 ensure the synchronization of the lifting and lowering of the two sides. After the lowering trolley rises to the position, the second proximity switch 209 receives a signal, the cylinder 201 receives a signal and is locked, and the signal is fed back to the robot end. The robot grabs the workpiece to release the workpiece. After the workpiece is released into the position, the photoelectric switch 303 receives a signal, the single valve 7 controls to open the cylinder 201, the cylinder 201 retracts, the guide mechanism 5 descends to the position, the first proximity switch 208 has a signal, the valve island 6 controls the locking mechanism 4 to open, and the worker pushes the trolley to leave and enter the next cycle.

[0054] Embodiment 2:

[0055] This embodiment provides a lifting method for a welding workshop unloading trolley, using the lifting device for the welding workshop unloading trolley as described in Example 1, including: pushing the unloading trolley onto the guide mechanism 5, positioning the unloading trolley by the positioning mechanism 3; when the third proximity switch 302 detects the unloading trolley, locking the unloading trolley by the locking mechanism 4;

[0056] The guide mechanism 5 is lifted by the lifting mechanism 2 to drive the unloading trolley to rise. When the first proximity switch 208 detects the unloading trolley, the lifting mechanism 2 works;

[0057] After the robot assembles the steel structure to the lower part trolley, the guide mechanism 5 is lowered through the lifting mechanism 2 to drive the lower part trolley to descend. When the second proximity switch 209 detects the lower part trolley, the lifting mechanism 2 works and the locking mechanism 4 opens.

[0058] Embodiment 3:

[0059] This embodiment provides a welding workshop, which is provided with a lifting device for a welding workshop unloading trolley as described in Embodiment 1; the robots and other equipment in the welding workshop can be realized by conventional technologies and will not be described in detail here.

[0060] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A lifting device for a trolley for unloading parts in a welding workshop, characterized in that: It comprises two racks (1) arranged in a mirror image, and a lifting mechanism (2), a positioning mechanism (3), a locking mechanism (4) and a guiding mechanism (5) arranged on each rack (1); The guide mechanism (5) is arranged on the frame (1) through the lifting mechanism (2), and the positioning mechanism (3) and the locking mechanism (4) are respectively arranged at two ends of the guide mechanism (5); The lifting mechanism (2) comprises a first proximity switch (208) and a second proximity switch (209), and the positioning mechanism (3) is provided with a third proximity switch (302); the lifting distance of the unloading trolley is determined according to the first proximity switch (208) and the second proximity switch (209), and the required locking position of the unloading trolley is determined by the third proximity switch (302).

2. A lifting device for a welding workshop unloading trolley as claimed in claim 1, characterized in that: The frame (1) comprises a base (101), vertical beams (102) vertically arranged at both ends of the base (101), and a horizontal beam (103) arranged at one end of the vertical beam (102) away from the base (101).

3. A lifting device for a welding workshop unloading trolley as claimed in claim 2, characterized in that: The vertical beam (102) is provided with a first slide groove (1021); the lifting mechanism (2) comprises a cylinder (201) arranged on the base (101), a moving beam (202) arranged on the cylinder (201), sprocket wheels (204) arranged at both ends of the moving beam (202), and a chain (205) arranged on the sprocket wheel (204); the two ends of the moving beam (202) are respectively slidably connected to the first slide groove (1021) through a first slider (203); one end of the chain (205) is fixed on the moving beam (202), and the other end is connected to the guide mechanism (5) after passing around the sprocket wheel (204).

4. A lifting device for a welding workshop unloading trolley as claimed in claim 2, characterized in that: The lifting mechanism (2) further comprises a pulley (206) arranged on the vertical beam (102), and a steel wire (207) arranged on the pulley (206).

5. A lifting device for a welding workshop unloading trolley as claimed in claim 4, characterized in that: The pulley (206) comprises a first pulley (2061) and a second pulley (2062) at two ends of one vertical beam (102), and a third pulley (2063) and a fourth pulley (2064) at two ends of the other vertical beam (102), respectively arranged in two mirror-imaged frames (1); the steel wire (207) comprises a first steel wire (2071) and a second steel wire (2072); one end of the first steel wire (2071) is fixed to one of the guide mechanisms (5), and the other end is fixed to the other guide mechanism (5) after passing through the first pulley (2061) and the second pulley (2062); one end of the second steel wire (2072) is fixed to one of the guide mechanisms (5), and the other end is fixed to the other guide mechanism (5) after passing through the third pulley (2063) and the fourth pulley (2064).

6. A lifting device for a welding workshop unloading trolley as claimed in claim 2, characterized in that: The first proximity switch (208) and the second proximity switch (209) are respectively arranged at different positions of the vertical beam (102); and a tank chain (210) is arranged between the vertical beam (102) and the locking mechanism (4).

7. A lifting device for a welding workshop unloading trolley as claimed in claim 1, characterized in that: The positioning mechanism (3) further comprises a buffer (301), a photoelectric switch (303) and a pin hole (304); the photoelectric switch (303) is used to detect the condition of the steel structure on the unloading trolley.

8. A lifting device for a welding workshop unloading trolley as claimed in claim 2, characterized in that: The vertical beam (102) is also provided with a second slide groove (1022); the guide mechanism (5) comprises a track (501), and a guide block (502) and a limit block (503) arranged at one end of the track (501); an inclined portion is arranged at one end of the guide block (502) away from the track (501); the track (501) is slidably connected to the second slide groove (1022) via a second slider (504); The locking mechanism (4) is arranged on the track (501) at one end of the guide block (502), and the locking mechanism (4) comprises a block driving source (401) and a block (402) arranged on the driving source (401).

9. A lifting method for a trolley for unloading parts in a welding workshop, characterized in that: The lifting device for the unloading trolley in the welding workshop as claimed in any one of claims 1 to 8 is used, comprising: pushing the unloading trolley onto the guide mechanism (5), positioning the unloading trolley by the positioning mechanism (3); locking the unloading trolley by the locking mechanism (4) when the third proximity switch (302) detects the unloading trolley; The guide mechanism (5) is lifted by the lifting mechanism (2), driving the unloading trolley to rise, and when the first proximity switch (208) detects the unloading trolley, the lifting mechanism (2) starts to operate; After the robot assembles the steel structure on the lower part trolley, the guide mechanism (5) is lowered through the lifting mechanism (2), driving the lower part trolley to descend. When the second proximity switch (209) detects the lower part trolley, the lifting mechanism (2) works and the locking mechanism (4) opens.

10. A welding workshop, characterized in that: A lifting device for a welding workshop unloading trolley is provided as described in any one of claims 1 to 8.

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