Multi-shaft winding machine assembly line for electromagnetic wire production
By designing the winding mechanism of automated pick-up and placement components and hydraulic cylinder drives on the multi-axis winding machine assembly line for electromagnetic wire production, the cumbersome problem of electromagnetic cylinder pick-up and placement in the existing technology is solved, automated production is realized, and efficiency and product quality are improved.
Patent Information
- Application Number
- CN202421354680.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-14
AI Technical Summary
In the existing multi-axis winding machine assembly line for electromagnetic wire production, the pick-up and placement of multiple electromagnetic cylinders requires manual operation, which leads to cumbersome and time-consuming operation, and increases the intensity of manual labor.
A multi-axis winding machine assembly line is designed, using mechanical devices such as pick-and-place components and hydraulic cylinders. Through an automated clamping and moving mechanism, the electromagnetic cylinder is replaced by manual pick-up and placement of the electromagnetic cylinder on the multi-axis column, and the guide column and moving plate are driven to move through the hydraulic cylinder to achieve uniform winding of the electromagnetic lines.
The process of automatic picking and discharge of electromagnetic cylinders is realized, reducing manual operation time and labor intensity, improving production efficiency, ensuring uniform winding of electromagnetic lines, and improving product quality.
Smart Images

Figure CN222785157U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of multi-axis winding machine production lines for electromagnetic wire production, in particular to a multi-axis winding machine production line for electromagnetic wire production. Background Art
[0002] The multi-axis winding machine assembly line for electromagnetic wire production is a special equipment for producing electromagnetic wire. It is mainly used in motors, transformers, coils and other fields. These devices usually have multiple axes and can wind multiple wires at the same time. With the continuous development of electronic products, the demand for electromagnetic wire is also increasing. The multi-axis winding machine needs to have the ability of high-speed winding to meet the market demand for production efficiency and capacity.
[0003] A technical solution for a multi-axis winding machine is disclosed in the prior art, in which a fixed axis mechanism, a main axis mechanism, a pay-off mechanism and a controller are provided. The fixed axis mechanism includes two spaced apart supports, a cross bar rotatably mounted on the two supports, and at least one group of fixed axes fixedly arranged in the length direction of the cross bar. The main axis mechanism includes a group of rotatable main axes and a drive motor that is the same number as each group of fixed axes. The drive motor is drive-connected to the main axis, and each main axis has at least one lead tube. The controller is electrically connected to the pay-off mechanism and the drive motor. The wire paid out by the pay-off mechanism is pulled through the lead tube and fixed to a to-be-wound skeleton fixedly mounted on the fixed axis. As the main axis rotates, the wire is wound around the skeleton.
[0004] In this solution, the electromagnetic wire is wound on the electromagnetic cylinder in multiple axes. Since the multiple electromagnetic cylinders need to be manually placed by the operator, the multi-axis process is cumbersome and increases the operator's workload, which is time-consuming.
[0005] Therefore, it is necessary to provide a multi-axis winding machine assembly line for electromagnetic wire production to solve the above technical problems. Utility Model Content
[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a multi-axis winding machine assembly line for electromagnetic wire production, which can replace manual operation to place multiple electromagnetic cylinders on the multi-axis, thereby reducing the working time of operators and reducing the labor intensity.
[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0008] A multi-axis winding machine assembly line for electromagnetic wire production includes: an electromagnetic wire multi-axis winding machine mechanism and a pick-and-place assembly, wherein the electromagnetic wire multi-axis winding machine mechanism includes a workbench, movable grooves are provided on both sides of the workbench, a movable block is slidably connected to the inside of the movable groove, a first movable rod and a second movable rod are connected to the movable block by welding, a threaded screw rod is penetrated inside the first movable rod, one end of the threaded screw rod is connected to a rotating motor by bolts, the rotating motor is connected to one end of the workbench by bolts, and the first movable rod and the second movable rod are connected to the inside of the first movable rod by screws. The rod is fixedly installed with a first clamping plate, the first clamping plate is provided with a plurality of curved grooves, the first moving rod and the second moving rod are provided with sliding grooves inside, the sliding grooves are slidably connected with sliding blocks, the sliding blocks are connected and fixed to the second clamping plate by welding, the second clamping plate is provided with a plurality of curved grooves, a clamping guide column is installed on the upper end of the second clamping plate, the clamping guide column is fixedly installed on the clamping cylinder, the clamping cylinder is connected to the upper ends of the first moving rod and the second moving rod by bolts, and the first clamping plate and the second clamping plate clamp an electromagnetic cylinder.
[0009] Preferably, the upper end of the workbench is connected and fixed to a support plate by welding, one end of the support plate is penetrated by a plurality of multi-axis columns, one end of the multi-axis column is sleeved with an electromagnetic tube, the multi-axis column is connected with a gear by bolts, a rotating shaft is installed at one end of the gear, a servo motor is installed at one end of the rotating shaft, the multiple multi-axis columns are meshed with gears through transmission belts, and the meshing of the multiple gears and the transmission belt can drive the multi-axis columns to rotate.
[0010] Preferably, one end of the workbench is connected and fixed to the mounting plate by bolts, a hydraulic cylinder is installed at one end of the mounting plate, a lifting guide column is installed at one end of the hydraulic cylinder, one end of the lifting guide column is connected and fixed to the movable plate by bolts, one end of the movable plate is fixedly installed with a supporting guide column, the supporting guide column is connected to the inside of a guide sleeve through a through connection, and the through connection of the guide sleeve is connected to the inside of both sides of the support plate.
[0011] Preferably, one end of the movable plate is connected and fixed to a fixed block by bolts, a movable shaft is connected through the interior of the fixed block, the movable shaft is installed inside a bearing, the movable shaft is connected through an electromagnetic winding tube, the electromagnetic winding tube is connected to a support block by bolts, and the support block is connected to one end of the movable plate by welding.
[0012] Preferably, one end of the movable plate is connected and fixed with several tension adjustment components by bolts, and the tension adjustment component includes a straight plate, and one end of the straight plate is connected and fixed with an articulated sleeve and a connecting block by welding, and the articulated sleeve and the internal hinged connection of the connecting block are provided with a movable bolt, and a guide cylinder is installed on the outer side of the movable bolt, and a movable plate is installed on the outer side of the movable bolt, and one end of the movable plate is connected with an electromagnetic wire reel.
[0013] Preferably, a spring is installed inside the guide cylinder, a movable guide column is installed on the upper end of the spring, a movable bolt is installed on one end of the movable guide column and is hingedly connected to the lower end of the movable plate.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] (1) The utility model utilizes a pick-and-place assembly and moves the first clamping plate and the second clamping plate to a plurality of multi-axis column position areas, places a plurality of electromagnetic tubes on the multi-axis columns, and takes out the electromagnetic tubes in the same manner, thereby reducing the manual work of picking up and placing the electromagnetic tubes. The process of automatically clamping and moving the electromagnetic tubes can be completed quickly and accurately, thereby speeding up the work on the production line, reducing the need for manual work of picking up and placing the electromagnetic tubes, and reducing manual labor time.
[0016] (2) The utility model utilizes a hydraulic cylinder, a lifting guide column, a supporting guide column and a moving plate. The hydraulic cylinder is driven to move the lifting guide column, which further drives the moving plate to move, and further drives the supporting guide column to move inside the guide sleeve. The electromagnetic wire can be evenly wound on the electromagnetic cylinder through the moving plate and the back and forth movement.
[0017] (3) The utility model utilizes a tension adjustment component to automatically adjust the tension, thereby ensuring that the tension applied to the electromagnetic wire during the winding process is uniform, avoiding stretching or relaxation of the wire due to uneven tension, thereby ensuring the quality of the final product. Appropriate tension can avoid breakage or damage of the electromagnetic wire during the winding process due to excessive or insufficient tension. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A first-view structural diagram of a multi-axis winding machine assembly line for electromagnetic wire production provided by the utility model;
[0019] Figure 2 A second perspective structural schematic diagram of a multi-axis winding machine assembly line for electromagnetic wire production provided by the utility model;
[0020] Figure 3 A schematic diagram of the gear and transmission belt structure of a multi-axis winding machine assembly line for electromagnetic wire production provided by the utility model;
[0021] Figure 4 A schematic diagram of the structure of the pick-and-place assembly of a multi-axis winding machine assembly line for electromagnetic wire production provided by the utility model;
[0022] Figure 5 A schematic diagram of the clamping plate structure of a multi-axis winding machine assembly line for electromagnetic wire production provided by the utility model;
[0023] Figure 6 A schematic diagram of the structure of the tension adjustment assembly and the electromagnetic winding drum of the multi-axis winding machine assembly line for electromagnetic wire production provided by the utility model;
[0024] Figure 7 A schematic diagram of the structure of an electromagnetic wire bobbin of a multi-axis winding machine assembly line for producing electromagnetic wires provided by the utility model;
[0025] Figure 8 A schematic diagram of the structure of the spring and movable guide pillar of the multi-axis winding machine assembly line for electromagnetic wire production provided by the utility model;
[0026] Among them, the names corresponding to the reference numerals are: 100, electromagnetic wire multi-axis winding machine mechanism; 101, support plate; 102, workbench; 103, moving groove; 104, guide sleeve; 105, support guide column; 106, hydraulic cylinder; 107, mounting box plate; 108, servo motor; 109, multi-axis column; 110, rotating shaft; 112, transmission belt; 113, gear; 114, moving plate; 115, fixed block; 116, support block; 117, bearing; 118, movable shaft; 119, mounting plate; 120, lifting guide column; 121, electromagnetic winding cylinder; 200, pick-and-place assembly; 20 1. Rotating motor; 202. Threaded screw; 203. First moving rod; 204. Second moving rod; 205. Moving block; 206. Clamping cylinder; 207. First clamping plate; 208. Second clamping plate; 209. Electromagnetic cylinder; 210. Clamping guide post; 211. Sliding block; 212. Curved groove; 213. Curved groove; 214. Sliding groove; 300. Tension adjustment assembly; 301. Straight plate; 302. Movable bolt; 303. Articulated sleeve; 304. Movable plate; 306. Guide cylinder; 307. Connecting block; 309. Electromagnetic wire reel; 311. Moving guide post; 312. Spring. DETAILED DESCRIPTION
[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.
[0028] First embodiment:
[0029] like Figure 1 , Figure 4-5As shown, the utility model provides a multi-axis winding machine assembly line for electromagnetic wire production, including: an electromagnetic wire multi-axis winding machine mechanism 100 and a pick-and-place assembly 200, the electromagnetic wire multi-axis winding machine mechanism 100 includes a workbench 102, and movable grooves 103 are provided on both sides of the workbench 102. The interior of the movable groove 103 is connected with a movable block 205 by sliding, and the movable block 205 is connected with a first movable rod 203 and a second movable rod 204 by welding. The interior of the first movable rod 203 is connected with a threaded screw 202 by passing through, and one end of the threaded screw 202 is connected with a rotating motor 201 by bolts. The rotating motor 201 is connected to one end of the workbench 102 by bolts, and the first moving rod 203 and the second moving rod 204 are fixedly installed with a first clamping plate 207, and the first clamping plate 207 has a plurality of curved grooves 212. The first moving rod 203 and the second moving rod 204 have sliding grooves 214 inside, and the sliding groove 214 is connected to a sliding block 211 by sliding. The sliding block 211 is connected and fixed to the second clamping plate 208 by welding, and the second clamping plate 208 has a plurality of curved grooves 213. A clamping guide column 210 is installed on the upper end of the second clamping plate 208, and the clamping guide column 210 The clamping cylinder 206 is fixedly mounted on the clamping cylinder 206, which is connected to the upper ends of the first moving rod 203 and the second moving rod 204 by bolts. The first clamping plate 207 and the second clamping plate 208 clamp the electromagnetic tube 209. In actual use, when the operator places multiple electromagnetic tubes 209 on the curved groove 212 and the curved groove 213 of the first clamping plate 207 and the second clamping plate 208, the clamping guide column 210 is driven to move by driving the clamping cylinder 206, and further drives the sliding block 211 to move inside the sliding groove 214 of the first moving rod 203 and the second moving rod 204. Move, and drive the second clamping plate 208 to move, clamp the multiple electromagnetic tubes 209, and then further drive the rotating motor 201 to drive the threaded screw 202 to rotate, further drive the moving block 205 and the first moving rod 203 and the second moving rod 204 to move inside the moving groove 103, and move the first clamping plate 207 and the second clamping plate 208 to the position area of multiple multi-axis columns 109, place multiple electromagnetic tubes 209 on the multi-axis column 109, and take out the electromagnetic tube 209 with the same operation, which can reduce the manual work of taking and placing the electromagnetic tube 209.
[0030] In this embodiment, by utilizing the pick-and-place assembly 200 and moving the first clamping plate 207 and the second clamping plate 208 to the position areas of multiple multi-axis columns 109, multiple electromagnetic tubes 209 are placed and sleeved on the multi-axis columns 109, and the electromagnetic tubes 209 are taken out in the same manner, which can reduce manual picking and placing of the electromagnetic tubes 209. The process of automatically clamping and moving the electromagnetic tubes 209 can be completed quickly and accurately, thereby speeding up the work speed on the production line, reducing the need for manual picking and placing of the electromagnetic tubes 209, and reducing manual labor time.
[0031] Second embodiment:
[0032] like Figure 1-3 As shown, the upper end of the workbench 102 is connected and fixed to the support plate 101 by welding, one end of the support plate 101 is penetrated by a plurality of multi-axis columns 109, one end of the multi-axis column 109 is sleeved with an electromagnetic tube 209, the multi-axis column 109 is connected with a gear 113 by bolts, one end of the gear 113 is installed with a rotating shaft 110, one end of the rotating shaft 110 is installed with a servo motor 108, the plurality of multi-axis columns 109 are meshed with the gear 113 through a transmission belt 112, and the meshing of the plurality of gears 113 with the transmission belt 112 can drive the multi-axis columns 109 to rotate. In actual use, the rotating shaft 110 is driven to rotate by driving the servo motor 108, and the gear 113 is further driven to rotate. The meshing of the plurality of gears 113 with the transmission belt 112 can drive the multi-axis columns 109 to rotate, and the electromagnetic wire is further wound around the electromagnetic tube 209.
[0033] Third embodiment:
[0034] like Figure 1-2 As shown in , 6, one end of the workbench 102 is connected and fixed to the mounting plate 119 by bolts, and a hydraulic cylinder 106 is installed at one end of the mounting plate 119, and a lifting guide column 120 is installed at one end of the hydraulic cylinder 106. One end of the lifting guide column 120 is connected and fixed to the moving plate 114 by bolts, and one end of the moving plate 114 is fixedly installed with a supporting guide column 105. The supporting guide column 105 is connected to the inside of the guide sleeve 104 through a penetration, and the penetration of the guide sleeve 104 is connected to the inside of both sides of the support plate 101. In actual use, when the electromagnetic wire is wound around the electromagnetic tube 209, the lifting guide column 120 is driven to move by driving the hydraulic cylinder 106, which further drives the moving plate 114 to move, and further drives the supporting guide column 105 to move inside the guide sleeve 104. Through the moving plate 114 and the back and forth movement, the electromagnetic wire can be evenly wound around the electromagnetic tube 209.
[0035] In this embodiment, by utilizing the hydraulic cylinder 106, the lifting guide column 120, the support guide column 105 and the moving plate 114, the hydraulic cylinder 106 is driven to drive the lifting guide column 120 to move, further drive the moving plate 114 to move, and further drive the support guide column 105 to move inside the guide sleeve 104. Through the moving plate 114 and the back and forth movement, the electromagnetic wire can be evenly wound on the electromagnetic tube 209.
[0036] Fourth embodiment:
[0037] like Figure 6 As shown, one end of the movable plate 114 is connected and fixed to the fixed block 115 by bolts, and a movable shaft 118 is connected through the interior of the fixed block 115, and the movable shaft 118 is installed inside the bearing 117. The movable shaft 118 is connected through an electromagnetic winding cylinder 121, and the electromagnetic winding cylinder 121 is connected to the support block 116 by bolts. The support block 116 is connected to one end of the movable plate 114 by welding. The electromagnetic winding cylinder 121 can release the electromagnetic wire, and the electromagnetic winding cylinder 121 can rotate automatically.
[0038] Fifth embodiment:
[0039] like Figure 6-8 As shown, one end of the movable plate 114 is connected and fixed with several tension adjustment components 300 by bolts, and the tension adjustment component 300 includes a straight plate 301, and one end of the straight plate 301 is connected and fixed with an articulated sleeve 303 and a connecting block 307 by welding, and the articulated sleeve 303 and the connecting block 307 are internally hingedly connected with a movable bolt 302. The movable bolt 302 is provided with a guide cylinder 306 on the outside, and a movable plate 304 is provided on the outside of the movable bolt 302. One end of the movable plate 304 is connected with an electromagnetic wire cylinder 309, and a spring 312 is provided inside the guide cylinder 306. A movable guide column 311 is provided on the upper end of the spring 312, and a movable guide column 311 is provided on one end of the movable guide column 311. The bolt 302 is hingedly connected to the lower end of the movable plate 304. In actual use, when the electromagnetic wire is released from the electromagnetic winding cylinder 121, and the electromagnetic wire is wound on the electromagnetic cylinder 209 through the rotation of the multi-axis column 109, the tension is automatically adjusted and controlled by the movable plate 304 and the electromagnetic wire cylinder 309 according to the tension swing of the electromagnetic wire. The movable plate 304 is rotated on the movable bolt 302, and the guide column 311 is further moved to rotate at the lower end of the movable plate 304, and the guide column 311 is further moved to move inside the guide cylinder 306, and the spring 312 is driven to compress and rebound, so as to further control the tension of the movable plate 304 and the electromagnetic wire.
[0040] In this embodiment, by utilizing the tension adjustment component 300 and automatically adjusting the tension, it is possible to ensure that the tension to which the electromagnetic wire is subjected during the winding process is uniform, thereby avoiding stretching or relaxation of the wire due to uneven tension, thereby ensuring the quality of the final product. Appropriate tension can avoid breakage or damage of the electromagnetic wire during the winding process due to excessive or insufficient tension.
[0041] When in use, the operator first places multiple electromagnetic tubes 209 on the curved grooves 212 and the curved grooves 213 of the first clamping plate 207 and the second clamping plate 208, and drives the clamping cylinder 206 to move the clamping guide column 210, and further drives the sliding block 211 to move inside the sliding grooves 214 of the first moving rod 203 and the second moving rod 204, and drives the second clamping plate 208 to move, and clamps the multiple electromagnetic tubes 209. After that, the rotating motor 201 is further driven to drive the threaded screw 202 to rotate, and further drives the moving block 205 and the first moving rod 203 and the second moving rod 204 to move inside the moving groove 103, and moves the first clamping plate 207 and the second clamping plate 208 to multiple multi-axis. In the column 109 position area, multiple electromagnetic tubes 209 are placed and sleeved on the multi-axis column 109, and the same operation is performed to take out the electromagnetic tube 209. Then, the servo motor 108 is driven to drive the rotating shaft 110 to rotate, and the gear 113 is further driven to rotate. The multi-axis column 109 can be driven to rotate by meshing the multiple gears 113 with the transmission belt 112, and the electromagnetic wire can be further wound on the electromagnetic tube 209. When the electromagnetic wire is wound on the electromagnetic tube 209, the lifting guide column 120 is driven to move by driving the hydraulic cylinder 106, and the moving plate 114 is further driven to move, and the supporting guide column 105 is further driven to move inside the guide sleeve 104. The electromagnetic wire can be evenly wound on the electromagnetic tube 209 through the moving plate 114 and the back and forth movement.
[0042] The above embodiment is only one of the preferred implementation modes of the present utility model and should not be used to limit the protection scope of the present utility model. Any changes or modifications that are made to the main design concept and spirit of the present utility model without any substantive significance, as long as the technical problems solved are still consistent with the present utility model, should be included in the protection scope of the present utility model.
Claims
1. Multi-axis winding machine production line for electromagnetic wire production, characterized in that: include: An electromagnetic wire multi-axis winding machine mechanism (100) and a pick-and-place assembly (200), wherein the electromagnetic wire multi-axis winding machine mechanism (100) comprises a workbench (102), movable grooves (103) are provided on both sides of the workbench (102), a movable block (205) is slidably connected to the inside of the movable groove (103), the movable block (205) is connected to a first movable rod (203) and a second movable rod (204) by welding, a threaded screw (202) is penetrated inside the first movable rod (203), one end of the threaded screw (202) is connected to a rotating motor (201) by bolts, the rotating motor (201) is connected to one end of the workbench (102) by bolts, and a first clamping plate (207) is fixedly installed on the first movable rod (203) and the second movable rod (204). The first clamping plate (207) is provided with a plurality of curved grooves (212); the first moving rod (203) and the second moving rod (204) are provided with sliding grooves (214); the sliding grooves (214) are connected to sliding blocks (211) by sliding; the sliding blocks (211) are connected and fixed to the second clamping plate (208) by welding; the second clamping plate (208) is provided with a plurality of curved grooves (213); a clamping guide column (210) is installed at the upper end of the second clamping plate (208); the clamping guide column (210) is fixedly installed on the clamping cylinder (206); the clamping cylinder (206) is connected to the upper ends of the first moving rod (203) and the second moving rod (204) by bolts; the first clamping plate (207) and the second clamping plate (208) clamp an electromagnetic tube (209).
2. The multi-axis winding machine assembly line for electromagnetic wire production according to claim 1, characterized in that: The upper end of the workbench (102) is connected and fixed to the support plate (101) by welding, one end of the support plate (101) is penetrated by a plurality of multi-axis columns (109), one end of the multi-axis column (109) is sleeved with an electromagnetic tube (209), the multi-axis column (109) is connected to a gear (113) by bolts, one end of the gear (113) is installed with a rotating shaft (110), one end of the rotating shaft (110) is installed with a servo motor (108), the plurality of multi-axis columns (109) are meshed with the gear (113) via a transmission belt (112), and the meshing of the plurality of gears (113) with the transmission belt (112) can drive the multi-axis columns (109) to rotate.
3. The multi-axis winding machine assembly line for electromagnetic wire production according to claim 2, characterized in that: One end of the workbench (102) is connected and fixed to a mounting plate (119) by means of bolts, one end of the mounting plate (119) is installed with a hydraulic cylinder (106), one end of the hydraulic cylinder (106) is installed with a lifting guide column (120), one end of the lifting guide column (120) is connected and fixed to a movable plate (114) by means of bolts, one end of the movable plate (114) is fixedly installed with a supporting guide column (105), the supporting guide column (105) is connected to the inside of a guide sleeve (104) through a through hole, and the through hole of the guide sleeve (104) is connected to the inside of both sides of the support plate (101).
4. The multi-axis winding machine assembly line for electromagnetic wire production according to claim 3, characterized in that: One end of the movable plate (114) is connected and fixed to a fixed block (115) by means of bolts; a movable shaft (118) is connected through the interior of the fixed block (115); the movable shaft (118) is installed inside a bearing (117); the movable shaft (118) is connected through an electromagnetic winding cylinder (121); the electromagnetic winding cylinder (121) is connected to a support block (116) by means of bolts; and the support block (116) is connected to one end of the movable plate (114) by means of welding.
5. The multi-axis winding machine assembly line for electromagnetic wire production according to claim 3, characterized in that: One end of the movable plate (114) is connected and fixed with a plurality of tension adjustment components (300) by means of bolts. The tension adjustment component (300) comprises a straight plate (301). One end of the straight plate (301) is connected and fixed with a hinge sleeve (303) and a connecting block (307) by means of welding. The hinge sleeve (303) and the connecting block (307) are hingedly connected to each other internally with a movable bolt (302). The movable bolt (302) is provided with a guide cylinder (306) on the outside of the movable bolt (302). The movable plate (304) is provided with a movable plate (304) on the outside of the movable bolt (302). One end of the movable plate (304) is connected with an electromagnetic wire reel (309).
6. The multi-axis winding machine assembly line for electromagnetic wire production according to claim 5, characterized in that: A spring (312) is installed inside the guide cylinder (306), a movable guide column (311) is installed on the upper end of the spring (312), and a movable bolt (302) is installed on one end of the movable guide column (311) and is hingedly connected to the lower end of the movable plate (304).