General assembly lifting appliance switching work station
By designing the assembly of the sling switch workstation, using RFID chips and automatic switching devices, the problems of insufficient differences in the sling support vehicle models and large workloads for workers in the existing technology are solved, and efficient and automated sling switch is achieved, which improves the Productivity and vehicle number.
Patent Information
- Application Number
- CN202411796497.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-02-14
AI Technical Summary
The existing automobile assembly workshop has insufficient differences in the spreader support models, resulting in a small number of production models. Workers need to manually switch the spreader fixed support, which has a large workload and affects production efficiency.
Design a total assembly sling switching workstation, including three workstations of OP01, OP02, and OP03 and a leg switchable sling. The sling is realized using RFID chips, leg positioning devices, leg position detection devices and leg automatic switching devices. Automatic switching and position detection with legs.
It improves the automation of spreader switching, reduces manpower and material resources, is suitable for the production of a variety of models, and improves production efficiency and number of models.
Smart Images
Figure CN119428927A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of automobile final assembly production line equipment, and in particular to a final assembly hoist switching workstation. Background Art
[0002] With the rapid development of the automobile manufacturing industry, the degree of automation is getting higher and higher, and the efficiency of automobile production has been greatly improved. In order to reduce production costs, most automobile manufacturers will use one production line to produce several models, and the fixed support needs to be switched for each model.
[0003] At present, the models supported by the hangers in the general assembly workshop cannot be too different, resulting in a small number of models produced in the general assembly workshop. The switching of the hanger fixed support is generally completed manually. However, when the model is switched frequently, the workload of the workers in switching the hanger fixed support will increase, and the production efficiency will be affected. At this stage, there are problems such as poor work efficiency and a relatively single number of production models. Summary of the invention
[0004] The purpose of the present invention is to provide a general assembly sling switching work account, which solves the problem that the sling support model of the general assembly workshop in the market cannot be too different, resulting in a small number of models produced in the general assembly workshop, and the switching of the sling fixed support is generally completed manually. However, when the model is switched frequently, the workload of the workers switching the sling fixed support will increase, and the production efficiency will be affected.
[0005] The technical solution adopted by the present invention is as follows: A general assembly hanger switching workstation includes three workstations OP01, OP02, and OP03 and a switchable leg hanger. The switchable leg hanger can be moved along a track between the OP01 workstation and the OP03 workstation in sequence. The switchable leg hanger includes a frame, a front switching leg, a rear switching leg and an RFID chip. The front switching leg and the rear switching leg are installed under the frame. The front switching leg and the rear switching leg are arranged corresponding to each other. The OP01 workstation and the OP03 workstation both include a leg positioning device, a leg position detection device and an RFID information reading and writing device. The leg positioning device and the leg position detection device are respectively arranged at the front switching leg and the rear switching leg. The OP02 workstation also includes an automatic leg switching device and a fixed base. The automatic leg switching device is installed on the upper end surface of the fixed base.
[0006] The front switching leg comprises a front arm, an inner leg, an outer leg and a locking block, the outer leg comprises an outer leg frame and an outer leg positioning plate, the outer leg positioning plate is installed at the bottom of the outer leg frame, the outer leg frame and the front arm are detachably connected, a positioning sleeve is provided on the outer leg positioning plate, an outer leg positioning pin is inserted in the positioning sleeve, a cavity is provided inside the outer leg frame, the inner leg comprises an inner leg telescopic arm and an inner leg positioning pin, the inner leg telescopic arm can be slidably arranged in the cavity of the outer leg frame, a telescopic positioning pin is provided on the inner leg telescopic arm, an inner leg positioning plate is provided at the rear of the inner leg telescopic arm, a positioning sleeve is provided on the inner leg positioning plate, the inner leg positioning pin is inserted in the positioning sleeve, the locking block comprises a locking block body and a locking block lock tongue, two grooves are provided on the inner leg telescopic arm, and the locking block lock tongue is engaged in the groove.
[0007] It is further defined that the rear switching leg includes a rear arm, an inner leg, an outer leg and a locking block, the outer leg includes the outer leg frame and the outer leg positioning plate, the outer leg positioning plate is installed below the outer leg frame, the outer leg frame and the rear arm are detachably connected, a positioning sleeve is provided on the outer leg positioning plate, an outer leg positioning pin is inserted in the positioning sleeve, a cavity is provided inside the outer leg frame, and the inner leg includes the inner leg telescopic The arm and the inner leg locating pin, the inner leg telescopic arm is slidably arranged in the cavity of the outer leg frame, the inner leg telescopic arm is provided with a supporting block, the rear part of the inner leg telescopic arm is provided with the inner leg positioning plate, the inner leg positioning plate is provided with a positioning sleeve, the inner leg locating pin is inserted in the positioning sleeve, the locking block includes a locking block body and a locking block lock tongue, the inner leg telescopic arm is provided with two grooves, and the locking block lock tongue is engaged in the groove.
[0008] It is further defined that the leg positioning device includes a positioning mounting bracket and a positioning telescopic cylinder, an "L"-shaped support plate is provided on the positioning mounting bracket, the positioning telescopic cylinder is installed on the other end surface of the support plate away from the positioning mounting bracket, the output shaft of the positioning telescopic cylinder is connected to the outer leg positioning pin, driving the outer leg positioning pin to move up and down.
[0009] It is further defined that the leg position detection device includes a detection bracket, a photoelectric switch and a distance sensor, the distance detection sensor is installed on the upper part of the detection bracket, a transverse fixing bracket is provided in the middle part of the detection bracket, and the photoelectric switch is installed on the transverse fixing bracket.
[0010] It is further defined that the automatic switching device for the outriggers is respectively arranged corresponding to the front switching outriggers and the rear switching outriggers and is located on the upper end surface of the fixed base, the automatic switching device for the outriggers includes a first fixed bracket and a second fixed bracket, the first fixed bracket is installed on the upper end surface of the fixed base, a transverse cylinder, a transverse slide rail, a transverse slider, a left limit block and a right limit block are installed on the first fixed bracket, the transverse slider is slidably arranged on the transverse slide rail, a moving block is arranged on the transverse slider, a first telescopic cylinder is installed on the moving block, the first telescopic cylinder is connected to the inner leg locating pin and drives the inner leg locating pin to move up and down, the left limit block and the right limit block are respectively installed on the left and right sides of the transverse slide rail, the second fixed bracket is installed on the upper end surface of the fixed base away from the first fixed bracket, a second telescopic cylinder is installed on the second fixed bracket, a cylinder end plate is installed on the output shaft of the second telescopic cylinder, the cylinder end plate is located directly below the locking tongue of the locking block, and the action of the second telescopic cylinder drives the cylinder end plate to move up and down.
[0011] It is further defined that a plurality of supporting feet are arranged on the side of the fixed base, and the plurality of supporting feet are all installed on the ground.
[0012] The beneficial effects of the present invention compared to the current technology are: 1. After the spreader enters the workstation, it is fixed and the spreader leg detection device reads the inner legs of the spreader. At the same time, the RFID information reading and writing device reads and writes the information of the RFID chip on the spreader, thereby obtaining the position information of the inner legs of the spreader. After reading the information, the PLC compares the position information of the inner legs of the spreader obtained from the MES with the position information of the inner legs of the spreader detected by the leg detection device. If the information is consistent, it directly enters the workstation OP20. If the information is inconsistent, an alarm is issued, and then manual intervention is performed. It is convenient and fast to use, not prone to errors, and has a high degree of automation.
[0013] 2. The PLC confirms the switching plan of the inner outrigger of the spreader according to the issued MES task. If switching is required, the outrigger switching of the spreader is realized through the outrigger automatic switching device. After the switching is completed, the outrigger position detection information of the spreader is used to detect whether the outrigger has been successfully switched. At the same time, the position information of the inner outrigger of the spreader is written into the RFID chip of the spreader through the RFID information reading and writing device, and the switching is automatically determined, which reduces manpower and material resources and is suitable for adapting to more vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional schematic diagram of three working stations in the present invention; Figure 2 It is a three-dimensional schematic diagram of the sling with switchable legs of the present invention; Figure 3 It is a schematic diagram of the connection relationship between the inner leg, the outer leg and the locking block in the front switching leg of the present invention; Figure 4 It is a schematic diagram of the connection relationship between the inner leg, the outer leg and the locking block in the rear switching leg of the present invention; Figure 5 It is a three-dimensional schematic diagram of the workstations OP01 and OP03 and the leg-switchable lifting device in the present invention; Figure 6 It is a three-dimensional schematic diagram of the outrigger positioning device in the present invention; Figure 7 It is a three-dimensional schematic diagram of the outrigger position detection device in the present invention; Figure 8 It is a three-dimensional schematic diagram of the workstation OP02 and the leg switchable lifting device in the present invention.
[0015] Fig. 9 It is a three-dimensional schematic diagram of the automatic switching device for outriggers in the present invention.
[0016] The markings in the figure correspond to: 1-OP01, 2-OP02, 3-OP03, 4-frame, 5-front switching leg, 51-front arm, 52-outer leg frame, 53-outer leg positioning plate, 533-positioning sleeve, 54-outer leg positioning pin, 55-inner leg telescopic arm, 56-inner leg positioning pin, 57-telescopic positioning pin, 58-inner leg positioning plate, 59, limit card block, 6-rear switching leg, 61-rear arm, 7-locking block body, 71-locking block lock tongue, 8-groove, 9-support block, 10-leg positioning device, 101-positioning mounting bracket, 102-positioning telescopic cylinder, 103-support plate, 11-leg position detection device, 111-detection bracket, 112-photoelectric switch, 113-distance detection sensor, 114-lateral fixed bracket, 12-leg automatic switching device, 121-first fixed bracket, 1211-lateral cylinder, 1212-lateral slide rail, 1213-lateral slider, 1214-moving block, 1215-first telescopic cylinder, 122-second fixed bracket, 1221-second telescopic cylinder, 1222-cylinder end plate, 13-fixed base, 14-limiting groove, 15-support foot. DETAILED DESCRIPTION
[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. Example
[0018] like Figure 1-9As shown, a general assembly hanger switching workstation includes an OP01 station 1, an OP02 station 2, an OP03 station 3 and a leg switchable hanger. The leg switchable hanger can be moved along the track between the OP01 station 1-OP03 station 3 in sequence. The leg switchable hanger is mainly used to carry different automobile bodies. The leg switchable hanger includes a frame 4, a front switching leg 5, a rear switching leg 6 and an RFID chip. The front switching leg 5 and the rear switching leg 6 are installed under the frame 4. The front switching leg 5 includes a front arm 51, an inner leg, an outer leg and a locking block. The outer leg includes an outer leg frame 52 and an outer leg positioning plate 53. The positioning plate 53 is installed below the outer leg frame 52. The outer leg frame 52 and the front arm 51 are detachably connected. A positioning sleeve 533 is provided on the outer leg positioning plate 53. An outer leg positioning pin 54 is inserted in the positioning sleeve 533. A cavity is provided inside the outer leg frame 52. The inner leg includes an inner leg telescopic arm 55 and an inner leg positioning pin 56. The inner leg telescopic arm 55 is slidably arranged in the cavity of the outer leg frame 52. A telescopic positioning pin 57 is provided on the inner leg telescopic arm 55. An inner leg positioning plate 58 is provided at the rear of the inner leg telescopic arm 55. A positioning sleeve 533 is provided on the inner leg positioning plate 58. The inner leg positioning pin 56 is inserted in the inner leg positioning pin 56. In the positioning sleeve 533, the locking block includes a locking block body 7 and a locking block lock tongue 71. Two grooves 8 are provided on the inner leg telescopic arm 55. The locking block lock tongue 71 is engaged in the groove 8, so that the locking block can lock the inner leg telescopic arm 55 to play a limiting role. The rear switching leg 6 includes a rear arm 61, an inner leg, an outer leg and a locking block. The outer leg includes an outer leg frame 52 and an outer leg positioning plate 53. The outer leg positioning plate 53 is installed below the outer leg frame 52. The outer leg frame 52 and the rear arm 61 are detachably connected. A positioning sleeve 533 is provided on the outer leg positioning plate 53. An outer leg positioning pin 54 is inserted in the positioning sleeve 533. A cavity is provided inside the outer leg frame 52, and the inner leg includes an inner leg telescopic arm 55 and an inner leg locating pin 56. The inner leg telescopic arm 55 is slidably arranged in the cavity of the outer leg frame 52, and a supporting block 9 is arranged on the inner leg telescopic arm 55. An inner leg locating plate 58 is arranged at the rear of the inner leg telescopic arm 55, and a locating sleeve 533 is arranged on the inner leg locating plate 58. The inner leg locating pin 56 is inserted into the locating sleeve 533, and the locking block includes a locking block body 7 and a locking block lock tongue 71. The inner leg telescopic arm 55 is provided with two grooves 8, and the locking block lock tongue 71 is engaged in the groove 8, so that the locking block can lock the inner leg telescopic arm 55 to play a limiting role.
[0019] The OP01 station includes a leg positioning device 10, a leg position detection device 11 and an RFID information reading and writing device. The leg positioning device 10 is used to position the leg switchable sling, the leg position detection device 11 is used to detect the leg position of the leg switchable sling, and the RFID information reading and writing device is used to obtain the information of the leg position of the sling by reading the RFID chip information on the leg switchable sling. There are four leg positioning devices 10 and four leg position detection devices 11, which are respectively arranged on the ground at the two front switching legs 5 and the two rear switching legs 6. The leg positioning device 10 includes a positioning mounting bracket 101 and a positioning extension bracket 102. The telescopic cylinder 102 is an L-shaped support plate 103 provided on the positioning and mounting bracket 101. The positioning and telescopic cylinder 102 is installed on the other end face of the support plate 103 away from the positioning and mounting bracket 101. The output shaft of the positioning and telescopic cylinder 102 is connected to the outer leg positioning pin 54 to drive the outer leg positioning pin 54 to move up and down. The leg position detection device 11 includes a detection bracket 111, a photoelectric switch 112 and a distance detection sensor 113. The distance detection sensor 113 is installed on the upper part of the detection bracket 111. A horizontal fixing frame 114 is provided in the middle part of the detection bracket 111, and the photoelectric switch 112 is installed on the horizontal fixing frame 114.
[0020] In addition to the outrigger positioning device 10, the outrigger position detection device 11 and the RFID information reading and writing device, the OP02 station is also provided with an outrigger automatic switching device 12, which is used to switch the position of the inner outrigger on the outrigger switchable sling. There are four outrigger automatic switching devices, which are respectively installed at the corresponding positions of the two front switching outriggers 5 and the two rear switching outriggers 6, and are located at the upper end surface of the fixed base 13. The outrigger automatic switching device includes a first fixed bracket 121 and a second fixed bracket 122, a plurality of legs 15 are arranged beside the fixed base 13 and placed on the ground, a first fixed bracket 121 is installed on the upper end surface of the fixed base 13, a transverse cylinder 1211, a transverse slide rail 1212, a transverse slider 1213, a left limit block and a right limit block are installed on the first fixed bracket 121, the transverse slider 1213 is slidably arranged on the transverse slide rail 1212, a moving block 1214 is arranged on the transverse slider 1213, and a first telescopic cylinder 1215 is installed on the moving block 1214 The first telescopic cylinder 1215 is connected to the inner leg positioning pin 56 and drives the inner leg positioning pin 56 to move up and down. The left limit block and the right limit block are respectively installed on the left and right sides of the transverse slide rail 1212. The left limit block and the right limit block limit the movement of the transverse slider 1213. The second fixed bracket 122 is installed on the upper end surface of the fixed base 13 away from the first fixed bracket 121. The second fixed bracket 122 is installed with a second telescopic cylinder 1221. The output shaft of the second telescopic cylinder 1221 A cylinder end plate 1222 is installed on it, and the cylinder end plate 1222 is located just below the locking block lock tongue 71. The action of the second telescopic cylinder 1221 drives the cylinder end plate 1222 to move up and down. When moving upward, the cylinder end plate 1222 hits the locking block lock tongue 71, causing the locking block lock tongue 71 to leave the groove 8 of the inner leg telescopic arm 55. When moving downward, the cylinder end plate 1222 leaves the locking block lock tongue 71, and the locking block lock tongue 71 is engaged in the groove 8 of the inner leg telescopic arm 55, thereby limiting the movement of the inner leg telescopic arm 55.
[0021] The device in the OP03 station is the same as the device on the OP01 station, which is mainly used to confirm the position of the inner leg in the switchable spreader. After the spreader enters the OP01 station, the spreader with switchable legs is fixed, and the position of the inner leg is read by the leg position detection device. At the same time, the RFID information reading and writing device reads and writes the information of the RFID chip on the spreader, thereby obtaining the position information of the inner leg of the spreader. After reading the information, the position information of the inner leg of the spreader obtained from the MES is compared with the position information of the inner leg of the spreader detected by the leg detection device through the PLC. If the information is consistent, it directly enters the OP02 station. If the information is inconsistent, an alarm is issued, and then manual intervention is performed. After the spreader enters the OP02 station, the spreader is fixed, and the RFID information reading and writing device reads and writes the information of the RFID chip on the spreader, thereby obtaining the position information of the inner leg of the spreader. The switching plan of the inner leg of the spreader is confirmed by the PLC according to the issued MES task. If switching is required, the switching of the legs of the spreader is achieved through the automatic leg switching device. After the switching is completed, the detection information of the leg position detection device is used to detect whether the spreader legs have been switched successfully. At the same time, the inner leg position information of the spreader is written into the RFID chip of the spreader through the RFID information reading and writing device. If switching is not required, directly enter the OP03 station. After the spreader enters the OP03 station from the OP02 station, the leg-switchable spreader is fixed, and the position of the inner leg of the spreader is read by the leg position detection device. At the same time, the RFID information reading and writing device reads and writes the information of the RFID chip on the spreader, thereby obtaining the position information of the inner leg of the spreader. After reading the information, the position information of the inner leg of the spreader obtained from the MES is compared with the position information of the inner leg of the spreader detected by the leg position detection device through the PLC. If the information is consistent, directly enter the next station. If the information is inconsistent, an alarm is issued, and then manual intervention is performed.
[0022] During the switching process, the positioning telescopic cylinder 102 is actuated to drive the outer leg positioning pin 54 to be inserted into the positioning sleeve 533 on the outer leg positioning plate 53, thereby fixing the outer leg positioning plate 53. The output shaft of the second telescopic cylinder 1221 drives the cylinder end plate 1222 to move upward and press against the locking block lock tongue 71, so that the locking block lock tongue 71 leaves the groove 8 of the inner leg telescopic arm 55. At this time, the inner leg telescopic arm can slide in the cavity of the outer leg frame 52. The first telescopic cylinder 1215 is started, and the output shaft drives the inner leg The locating pin 56 moves upward and is inserted into the locating sleeve 533 on the inner leg locating plate 58. The transverse telescopic cylinder 1213 drives the moving block 1214 to move on the transverse slide rail 1212, thereby driving the inner leg telescopic arm 55 to slide in the cavity of the outer leg frame 52. At the same time, limiting grooves 14 are provided on the front and rear side walls of the outer leg frame 52, and limiting blocks 59 are provided on the front and rear side walls of the inner leg telescopic arm 55. The limiting blocks 59 are clamped in the limiting grooves 14, which can limit the inner leg telescopic arm 55.
[0023] In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "first", "second", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0024] The above is a detailed introduction to an assembly hoist switching workstation provided by the present invention. The description of the specific embodiment is only used to help understand the method and core idea of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims
1. A general assembly hanger switching workstation, characterized by: The invention comprises an OP01 station (1), an OP02 station (2), an OP03 station (3) and a leg switchable sling, wherein the leg switchable sling can be moved along a track in sequence between the OP01 station (1) and the OP03 station (3), and is characterized in that: the leg switchable sling comprises a frame (4), a front switch leg (5), a rear switch leg (6) and an RFID chip, the front switch leg (5) and the rear switch leg (6) are installed below the frame (4), and the front switch leg (5) and the rear switch leg (6) are mutually opposed. It should be provided that the OP01 station (1) and the OP03 station (3) both include a leg positioning device (10), a leg position detection device (11) and an RFID information reading and writing device, the leg positioning device (10) and the leg position detection device (11) are respectively arranged at the front switching leg (5) and the rear switching leg (6), and the OP02 station (2) further includes an automatic leg switching device (12) and a fixed base (13), and the automatic leg switching device (12) is installed on the upper end surface of the fixed base (13).
2. The assembly hanger switching workstation according to claim 1, characterized in that: The front switching leg (5) comprises a front support arm (51), an inner support leg, an outer support leg and a locking block; the outer support leg comprises an outer support leg frame (52) and an outer support leg positioning plate (53); the outer support leg positioning plate (53) is installed below the outer support leg frame (52); the outer support leg frame (52) and the front support arm (51) are detachably connected; a positioning sleeve (533) is provided on the outer support leg positioning plate (53); an outer support leg positioning pin (54) is inserted into the positioning sleeve (533); a cavity is provided inside the outer support leg frame (52); the inner support leg comprises an inner support leg telescopic arm (55) and an inner support leg positioning pin (56); The inner leg telescopic arm (55) is slidably arranged in the cavity of the outer leg frame (52); a telescopic positioning pin (57) is arranged on the inner leg telescopic arm (55); an inner leg positioning plate (58) is arranged at the rear of the inner leg telescopic arm (55); a positioning sleeve (533) is arranged on the inner leg positioning plate (58); the inner leg positioning pin (56) is inserted into the positioning sleeve (533) of the inner leg positioning plate (58); the locking block includes a locking block body (7) and a locking block lock tongue (71); two grooves (8) are opened on the inner leg telescopic arm (55); the locking block lock tongue (71) is engaged in the groove (8).
3. The assembly hanger switching workstation according to claim 2, characterized in that: The rear switching leg (6) comprises a rear support arm (61), an inner support leg, an outer support leg and a locking block; the outer support leg comprises the outer support leg frame (52) and the outer support leg positioning plate (53); the outer support leg positioning plate (53) is installed below the outer support leg frame (52); the outer support leg frame (52) and the rear support arm (61) are detachably connected; a positioning sleeve (533) is provided on the outer support leg positioning plate (53); an outer support leg positioning pin (54) is inserted into the positioning sleeve (533); a cavity is provided inside the outer support leg frame (52); the inner support leg comprises the inner support leg telescopic arm (55) and the inner support leg positioning pin (54); 6), the inner leg telescopic arm (55) is slidably arranged in the cavity of the outer leg frame (52), the inner leg telescopic arm (55) is provided with a support block (9), the rear of the inner leg telescopic arm (55) is provided with an inner leg positioning plate (58), the inner leg positioning plate (58) is provided with a positioning sleeve (533), the inner leg positioning pin (55) is inserted into the positioning sleeve (533) of the inner leg positioning plate (58), the locking block includes a locking block body (7) and a locking block lock tongue (71), the inner leg telescopic arm (55) is provided with two grooves (8), and the locking block lock tongue (71) is engaged in the groove (8).
4. The assembly hanger switching workstation according to claim 3, characterized in that: The outrigger positioning device (10) comprises a positioning mounting bracket (101) and a positioning telescopic cylinder (102); an "L"-shaped support plate (103) is provided on the positioning mounting bracket (101); the positioning telescopic cylinder (102) is mounted on the other end surface of the support plate (103) away from the positioning mounting bracket (101); an output shaft of the positioning telescopic cylinder (102) is connected to the outer outrigger positioning pin (54) to drive the outer outrigger positioning pin (54) to move up and down.
5. The assembly hanger switching workstation according to claim 3, characterized in that: The leg position detection device (11) comprises a detection bracket (111), a photoelectric switch (112) and a distance detection sensor (113); the distance detection sensor (113) is mounted on the upper portion of the detection bracket (111); a transverse fixing bracket (114) is provided in the middle portion of the detection bracket (111); and the photoelectric switch (112) is mounted on the transverse fixing bracket (114).
6. The assembly hanger switching workstation according to claim 3, characterized in that: The automatic leg switching device (12) is respectively arranged corresponding to the front switching leg (5) and the rear switching leg (6) and is located on the upper end surface of the fixed base (13). The automatic leg switching device (12) comprises a first fixed bracket (121) and a second fixed bracket (122). The first fixed bracket (121) is installed on the upper end surface of the fixed base (13). A transverse cylinder (1211), a transverse slide rail (1212), a transverse slider (1213), a left limit block and a right limit block are installed on the first fixed bracket (121). The transverse slider (1213) is slidably arranged on the transverse slide rail (1212). A moving block (1214) is arranged on the transverse slider (1213). A first extension block (1214) is installed on the moving block (1214). The first telescopic cylinder (1215) is connected to the inner leg positioning pin (56) and drives the inner leg positioning pin (56) to move up and down. The left limit block and the right limit block are respectively installed on the left and right sides of the transverse slide rail (1212). The second fixed bracket (122) is installed on the upper end surface of the fixed base (13) away from the first fixed bracket (121). The second fixed bracket (122) is installed with a second telescopic cylinder (1221). The output shaft of the second telescopic cylinder (1221) is installed with a cylinder end plate (1222). The cylinder end plate (1222) is located directly below the locking block lock tongue (71). The second telescopic cylinder (1221) drives the cylinder end plate (1222) to move up and down.
7. The assembly hanger switching workstation according to claim 6, characterized in that: A plurality of supporting feet (15) are arranged on the side of the fixed base (13), and the plurality of supporting feet (15) are all installed on the ground.
8. The assembly hanger switching workstation according to claim 3, characterized in that: Limiting grooves (14) are provided on the front and rear side walls of the outer leg frame (52), and limiting clamping blocks (59) are provided on the front and rear side walls of the inner leg telescopic arm (55), and the limiting clamping blocks (59) are clamped in the limiting grooves (14).