Feeding trolley matched with traction type AGV

Abstract

The utility model discloses a feeding trolley matched with a traction type AGV (automatic guided vehicle), which comprises a flat frame, universal wheels and directional wheels are respectively arranged at the front end and the rear end of the flat frame, and a first lifting hook, a tray frame and an auxiliary material frame with a U-shaped stop lever are arranged on the flat frame. A front guide plate with a clamping hook and a rear guide plate with a lock catch are arranged at the front end and the rear end of the flat frame respectively, the lock catch comprises a guide plate, an upper clamping groove is formed in the guide plate, a bearing plate is arranged below the guide plate, a lower clamping groove is formed in the bearing plate, and a hook plate and a baffle are rotationally arranged between the guide plate and the bearing plate. A first tension spring is arranged between the second pin shaft on the hook plate and the first pin shaft on the guide plate, a second tension spring is arranged between the third pin shaft on the baffle and the first pin shaft on the guide plate, the hook plate is arranged between the upper clamping groove and the lower clamping groove in a blocking mode, the baffle abuts against the blocking groove of the hook plate, and a switch plate is arranged on the baffle. According to the utility model, the loading efficiency can be improved, and quick connection and quick disassembly can be realized.

Description

Technical Field

[0001] The utility model relates to the field of material transportation, in particular to a feeding trolley cooperating with a towing type AGV. Background Art

[0002] In large factories or workshops, the distances between tool warehouses, raw material warehouses and finished product warehouses and production workstations are relatively long. This requires using feeding trolleys to transport tools and raw materials for processing to the production workstations, and also using feeding trolleys to transport the processed products to the finished product warehouses. Currently, in order to achieve automated transportation, generally AGV equipment is used for transportation. An AGV can transport the tools and raw materials required by each production equipment from the tool warehouse and raw material warehouse to the corresponding production workstations according to the preset track path and program, and then transport the produced finished products to the corresponding finished product warehouses. Currently, there are latent AGVs, back-mounted AGVs and towing type AGVs on the market. Latent AGVs and back-mounted AGVs can only transport one feeding trolley at a time, with low efficiency, while a towing type AGV can tow multiple connected feeding trolleys at one time, greatly improving the work efficiency. The loading effect of the current feeding trolleys on the market is not good, and the connection structure between the feeding trolleys is relatively complex, and quick disassembly and quick connection cannot be achieved. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a feeding trolley cooperating with a towing type AGV that can load different materials and can also be quickly connected and quickly disassembled.

[0004] To achieve the above object, the technical solution adopted by the present utility model is as follows: A feeding trolley cooperating with a towing type AGV, comprising: a flat frame, with a universal wheel respectively arranged on the left and right sides of the front end of the flat frame, and a directional wheel respectively arranged on the left and right sides of the rear end of the flat frame. Vertical columns are vertically arranged at both the front and rear ends of the flat frame. A cross bar is arranged between the tops of the two vertical columns. A first hook is arranged on the right side wall of the cross bar. A tray frame is arranged between the two vertical columns, and the tray frame is located on the left side of the flat frame. An auxiliary material frame is arranged on the right side of the flat frame, and a number of U-shaped blocking rods are arranged at intervals in the auxiliary material frame. A front guide plate is arranged at the front end of the flat frame, and a hook is arranged forward on the front guide plate. A rear guide plate is arranged at the rear end of the flat frame, and a lock is arranged backward on the rear guide plate. The lock comprises: a guide plate, with an upper card slot arranged on the rear end wall of the guide plate, a through hole, a first pin shaft and an arc-shaped hole arranged on the guide plate. A receiving plate is arranged below the guide plate, and a lower card slot aligned with the upper card slot is arranged on the rear end wall of the receiving plate. A hook plate and a baffle are rotatably arranged between the guide plate and the receiving plate. An L-shaped lock tongue and a blocking slot are arranged on the hook plate. The rotation center of the hook plate is concentric with the center of the arc-shaped hole. A second pin shaft is arranged on the hook plate, and the second pin shaft is slidably clamped in the arc-shaped hole. A first tension spring is arranged between the second pin shaft and the first pin shaft. A third pin shaft is arranged on the baffle, and the third pin shaft passes through the through hole and extends upward out of the guide plate. A second tension spring is arranged between the third pin shaft and the first pin shaft. After the hook plate overcomes the pulling force of the first tension spring, the L-shaped lock tongue on the hook plate is blocked between the upper card slot and the lower card slot. The baffle abuts against the blocking slot of the hook plate under the pulling force of the second tension spring. A switch plate is arranged downward on the baffle.

[0005] Further, for the above-mentioned feeding trolley cooperating with a towing type AGV, a rotating shaft is arranged in the front guide plate, and a brake plate is rotatably arranged on the rotating shaft. The top wall and the front side wall of the end of the brake plate connected to the rotating shaft are connected by an arc surface in transition, and the center of the arc surface is located on the central axis of the rotating shaft. The top wall and the rear side wall of this end are connected by a right angle. A blocking plate is arranged in the front guide plate above the brake plate, and a pushing electric cylinder capable of pushing the brake plate is arranged on the blocking plate.

[0006] Further, for the above-mentioned feeding trolley cooperating with a towing type AGV, a first limiting part is respectively folded outward on the left and right side walls of the front guide plate, and a second limiting part is respectively folded outward on the left and right side walls of the rear guide plate.

[0007] Furthermore, the aforementioned feeding trolley that cooperates with the traction-type AGV, wherein the connection structure between the guide plate and the rear guide plate is: a connecting plate is welded on the rear guide plate, two through holes are provided on the connecting plate, a fixing plate is welded on the front end of the guide plate, rib plates are welded on the left and right sides of the guide plate respectively, the two rib plates are welded to the fixing plate, two long holes are provided on the fixing plate, the fixing plate is abutted against the connecting plate, the two long holes are aligned one by one with the two through holes respectively, and bolts are passed through between the relatively aligned long holes and the through holes.

[0008] Furthermore, the aforementioned feeding trolley that cooperates with the traction-type AGV is provided with a hook-increasing frame on the right side wall of the cross bar, a plurality of second hooks are arranged at intervals on the hook-increasing frame, and a plurality of third hooks are arranged at intervals on the right side wall of the pallet frame.

[0009] Furthermore, the aforementioned feeding trolley that cooperates with the traction-type AGV is provided with annular push handles at both the front and rear ends of the cross bar.

[0010] Furthermore, in the aforementioned feeding trolley that cooperates with the traction-type AGV, the upper card slot on the guide plate and the rear end wall are connected by a smooth transition of the arc surface, and the lower card slot on the receiving plate and the rear end wall are also connected by a smooth transition of the arc surface.

[0011] Furthermore, the aforementioned feeding trolley that cooperates with the traction-type AGV, wherein the guide plate and the receiving plate are connected by connecting bolts, and a spacer is mounted on the connecting bolts. The guide plate and the receiving plate are respectively resting on the two ends of the spacer, and two T-shaped swivel sleeves are also arranged between the guide plate and the receiving plate. The lower end of the T-shaped swivel sleeve is on the receiving plate, and the upper end of the T-shaped swivel sleeve is passed through the guide plate, and a connecting bolt is passed through the T-shaped swivel sleeve. The baffle and the hook plate are respectively rotatably mounted in the two T-shaped swivel sleeves, and the axis center of the T-shaped swivel sleeve with the hook plate is concentric with the center center of the arc hole, and a gasket is mounted on the T-shaped swivel sleeve, and the gaskets on the two T-shaped swivel sleeves are respectively located above the baffle and the hook plate.

[0012] The advantages of the present invention are: by arranging a pallet frame on the flat frame, the pallet can be carried, so that materials such as production tools can be loaded through the pallet; by arranging the first hook, the second hook and the third hook, annular materials and materials with packaging bags can be hoisted; by arranging the auxiliary material frame with a U-shaped baffle, tubular materials can be loaded, so that different types of materials can be loaded, which greatly improves the loading effect; hooks and locks are respectively provided at the front and rear ends of the feeding trolley, and the lock on the front feeding trolley can be connected with the hook on the rear feeding trolley. The unlocking and locking structure of the lock is simple and easy to use, and can realize quick connection and quick disassembly between the feeding trolleys. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a three-dimensional structural schematic diagram of the feeding trolley cooperating with the towed AGV described in the present utility model.

[0014] Figure 2 It is Figure 1 A schematic diagram of the connection structure between the front guide plate, the brake plate and the pushing electric cylinder in

[0015] Figure 3 It is Figure 1 A reverse three-dimensional structural schematic diagram of the lock in

[0016] Figure 4 It is Figure 3 A three-dimensional structural schematic diagram of after removing the guide plate, the fixing plate and the rib plate in

[0017] Figure 5 It is Figure 3 A sectional structural schematic diagram of

[0018] Figure 6 It is a structural schematic diagram when the lock is in the locked state.

[0019] Figure 7 It is a structural schematic diagram when the lock is in the open state.

[0020] Figure 8 It is a structural schematic diagram of the cooperation between the feeding trolley cooperating with the towed AGV described in the present utility model and the track. Specific embodiments

[0021] The technical solution described in the present utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0022] Such as Figures 1 to 8As shown, the feeding trolley matched with the traction type AGV described in the present invention comprises: a flat frame 1, a universal wheel 11 is respectively provided on the left and right sides of the front end of the flat frame 1, a directional wheel 12 is respectively provided on the left and right sides of the rear end of the flat frame 1, a front guide plate 2 is provided at the front end of the flat frame 1, a hook 21 is provided on the front guide plate 2, the feeding trolley can be connected to the traction type AGV through the hook 21, a rotating shaft 22 is provided in the front guide plate 2, a brake plate 23 is rotatably provided on the rotating shaft 22, and the top wall and the front side wall of the end where the brake plate 23 is connected to the rotating shaft are connected by an arc surface transition connection, the arc The center of the circle of the surface is located on the central axis of the rotating shaft 22, and the top wall and the rear side wall of the end are connected by a right angle. A shift plate 24 is provided in the front guide plate 2 located above the brake plate 23. The brake plate 23 will rotate downward under its own weight and rest against the bottom wall of the track. The track described in this embodiment is a track used in conjunction with a traction-type AGV. The shape of this track is a groove shape, which is laid on the ground with the groove facing upward. The front guide plate 2 is movably stuck in the track. When the feeding trolley moves backward, the brake plate 23 will be subjected to the forward force and then rotate forward and upward, and the arc surface between the top wall and the front side wall of the brake plate 23 can avoid the shift plate 2 4 makes the brake plate 23 rotate forward and upward smoothly, there is no interference between the bottom wall of the track and the brake plate 23, and the feeding trolley can move backward. When the feeding trolley moves forward, the brake plate 23 will be subjected to the backward force and rotate backward and upward. The right angle between the top wall and the rear side wall of the brake plate 23 will interfere with the shift plate 24, so that the brake plate 23 cannot rotate backward and upward smoothly. The brake plate 23 abuts against the bottom wall of the track, and the feeding trolley cannot move forward, playing a braking role. A pushing electric cylinder 25 is provided on the shift plate 24 to push the brake plate 23. When the feeding trolley needs to move forward, the pushing electric cylinder 25 drives the pushing cylinder 25 to push the brake plate 23. The rod moves downward, and the pushing rod abuts against the top wall of the brake plate 23, driving the brake plate 23 to rotate upward and leave the bottom wall of the track. When braking is needed, the pushing electric cylinder 25 drives the pushing rod to move upward, and the brake plate 23 is no longer subjected to the thrust of the pushing rod and rotates under its own weight to abut against the bottom wall of the track. First limiting parts 26 are folded outward on the left and right side walls of the front guide plate 2, respectively. The first limiting parts 26 are located below the rotating shaft 22. The two first limiting parts 26 are clamped in the track and abut against the two inner side walls of the track, which can not only play a guiding role, but also reduce the contact surface between the front guide plate 2 and the track, thereby reducing the friction between the front guide plate 2 and the track.

[0023] A rear guide plate 3 is provided at the rear end of the flat frame 1. The rear guide plate 3 is also movably clamped in the track. Second limiting portions 31 are respectively folded outward on the left and right side walls of the rear guide plate 3. The function of the second limiting portion 31 is the same as that of the first limiting portion 26. A connecting plate 32 is welded to the rear end of the rear guide plate 3. Two through holes are provided on the connecting plate 32. A lock catch 4 capable of cooperating with the hook 21 is provided on the connecting plate 32. The lock catch 4 includes: a guiding plate 41. A fixing plate 42 is welded to the front end of the guiding plate 41. Rib plates 43 are respectively welded on the left and right sides of the guiding plate 41. The two rib plates 43 are welded to the fixing plate 42 to strengthen the connection strength between the guiding plate 41 and the fixing plate 42. Two long strip holes 421 are provided on the fixing plate 42. The fixing plate 42 abuts against the connecting plate 32. The two long strip holes 421 are respectively aligned with the two through holes. Bolts are inserted through the aligned long strip holes 421 and through holes. An upper clamping groove 411 is provided on the rear end wall of the guiding plate 41. The upper clamping groove 411 and the rear end wall of the guiding plate 41 are smoothly connected through an arc surface. A through hole 412, a first pin shaft 413 and an arc-shaped hole 414 are provided on the guiding plate 41. A receiving plate 44 is provided below the guiding plate 41. A lower clamping groove 441 aligned with the upper clamping groove 411 is provided on the rear end wall of the receiving plate 44. The lower clamping groove 441 and the rear end wall of the receiving plate 44 are also smoothly connected through an arc surface. The guiding plate 41 and the receiving plate 44 are connected by a connecting bolt. A spacer sleeve 45 is sleeved on the connecting bolt. The guiding plate 41 and the receiving plate 44 respectively abut against both ends of the spacer sleeve 45, leaving an installation gap between the guiding plate 41 and the receiving plate 44. Two T-shaped rotating sleeves 46 are provided between the guiding plate 41 and the receiving plate 44. The lower ends of the T-shaped rotating sleeves 46 abut against the receiving plate 44. The upper ends of the T-shaped rotating sleeves 46 are inserted into the guiding plate 41. Connecting bolts are inserted through the T-shaped rotating sleeves 46. A baffle 47 and a hook plate 48 are respectively movably sleeved on the two T-shaped rotating sleeves 46 to improve the rotation stability of the baffle 47 and the hook plate 48 and prevent the baffle 47 or the hook plate 48 from shaking during rotation. The baffle 47 and the hook plate 48 are located in the installation gap between the guiding plate 41 and the receiving plate 44. An L-shaped locking tongue and a retaining groove are provided on the hook plate 48. Gaskets 461 are sleeved on the T-shaped rotating sleeves 46. The gaskets 461 on the two T-shaped rotating sleeves 46 are respectively located above the baffle 47 and the hook plate 48. The axis of the T-shaped rotating sleeve 46 sleeved with the hook plate 48 is concentric with the center of the arc-shaped hole 414. A second pin shaft 481 is provided on the hook plate 48. The second pin shaft 481 is slidably clamped in the arc-shaped hole 414. When the hook plate 48 rotates, the second pin shaft 481 can move along the arc-shaped hole 414. The arc-shaped hole 414 limits the rotation angle of the hook plate 48 by blocking the second pin shaft 481. A first tension spring 482 is provided between the second pin shaft 481 and the first pin shaft 413. A third pin shaft 471 is provided on the baffle 47. The third pin shaft 471 passes through the through hole 412 and extends upward out of the guiding plate 41.The third pin shaft 471 can move in the through hole 412. A second tension spring 472 is provided between the third pin shaft 471 and the first pin shaft 413. After the hook plate 48 overcomes the pulling force of the first tension spring 482, the L-shaped locking tongue on the hook plate 48 is blocked between the upper card slot 411 and the lower card slot 441. The baffle 47 abuts against the retaining groove of the hook plate 48 under the pulling force of the second tension spring 472. A switch plate 473 is arranged downward on the baffle 47. The baffle 47 and the hook plate 48 tend to move upward along the T-shaped rotating sleeve 46 under the pulling forces of the second tension spring 472 and the first tension spring 482 respectively. After the spacer 461 is sleeved on the two T-shaped rotating sleeves 46, the baffle 47 and the hook plate 48 will abut against the corresponding spacer 461, thereby ensuring the rotational flexibility of the baffle 47 and the hook plate 48.,

[0024] When a towing AGV towes multiple feeding trolleys, the feeding trolleys are connected through the clamping structure between the latch 4 and the catch 21. To facilitate the clamping between the feeding trolleys, a pushing mechanism capable of pushing the switch plate 473 is provided on the tracks of the production station, finished product warehouse, tool cart, and raw material warehouse. For example, a cam or link mechanism driven by a cylinder. Setting a pushing mechanism on the track is a relatively conventional technical solution in the prior art and will not be elaborated here. Moreover, the driving of the switch plate 473 can also be completed manually by the staff. During clamping, the brake plate 23 on the previous feeding trolley rotates downward and abuts against the track to stop. The switch plate 473 in the latch 4 of the previous feeding trolley is pushed to the right by the pushing mechanism on the track or the manual operation of the staff, so that the baffle 47 rotates away from the hook plate 48 against the tension of the second tension spring 472, and the baffle 47 disengages from the retaining groove on the hook plate 48. At this time, the hook plate 48 rotates under the tension of the first tension spring 472, and the L-shaped locking tongue on the hook plate 48 no longer blocks the upper clamping groove 411 and the lower clamping groove 441. After releasing the switch plate 473, the baffle 47 will automatically abut against the hook plate 48 under the tension of the second tension spring 472. The pushing electric cylinder 25 on the subsequent feeding trolley drives the push rod to push the brake plate 23 downward, so that the brake plate 23 rotates upward and disengages from the track. This feeding trolley moves forward along the track, and the catch 21 on this feeding trolley is inserted into the upper clamping groove 411 and the lower clamping groove 441 of the latch 4. The catch 21 pushes the hook plate 48 forward. When the catch 21 pushes the hook plate 48, the hook plate 48 rotates reversely against the tension of the first tension spring 482. When the hook plate 48 rotates reversely until the L-shaped locking tongue blocks the upper clamping groove 411 and the lower clamping groove 441 again, the baffle 47 is reinserted into the retaining groove of the hook plate 48 under the tension of the second tension spring 472 to lock the hook plate 48, and the catch 21 cannot disengage from the upper clamping groove 411 and the lower clamping groove 441, completing the clamping. After completion of the clamping, the pushing electric cylinder 25 on the subsequent feeding trolley pushes the brake plate 23 downward again to make it away from the track. When it is necessary to separate two feeding trolleys during transportation, the subsequent feeding trolley stops through the brake plate 23, and this feeding trolley pushes the switch plate 473 to the right through the pushing mechanism on the track or the manual operation of the staff. The baffle 47 no longer locks the hook plate 48. The hook plate 48 rotates under the tension of the first tension spring 482. The previous feeding trolley continues to move forward under the drive of the towing AGV, and the catch 21 on the subsequent feeding trolley will disengage from the latch 4 on the previous feeding trolley, and the latch 4 on the previous feeding trolley is in an open state, facilitating subsequent clamping.

[0025] Vertical poles 13 are provided at both ends of the front and rear of the flat frame 1, a cross bar 131 is provided between the tops of the two vertical poles 13, a first hook 132 is provided in the middle position of the right side wall of the cross bar 131, an additional hook frame 133 is provided on the right side wall of the cross bar 131, and a plurality of second hooks 134 are provided at intervals on the additional hook frame 133. The first hook 132 and the second hook 134 can lift annular materials or materials with packaging bags. A pallet frame 14 is provided between the two vertical poles 13. The pallet frame 14 is located on the left side of the flat frame 1. The pallet frame 14 can not only be used to carry pallets, but also can be used to place production tools or other production tools on the pallets. Materials, and the pallet frame 14 can enhance the connection strength between the two vertical poles 13. A number of third hooks 141 are arranged at intervals on the right side wall of the pallet frame 14. The third hooks 141 are also used to lift annular materials or materials with packaging bags. An auxiliary material frame 15 is provided on the right side of the flat frame 1. A number of U-shaped baffles 151 are arranged at intervals in the auxiliary material frame 15. Tubular materials can be placed in the auxiliary material frame 15. Annular push handles 135 are provided at the front and rear ends of the cross bar 131. When the feeding trolley is not connected to the AGV, the staff can hold any one of the annular push handles 135 to push or pull the feeding trolley to move along the track.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A feeding trolley cooperating with a towing AGV, comprising: The flat frame is characterized in that: a universal wheel is respectively provided on the left and right sides of the front end of the flat frame, a fixed wheel is respectively provided on the left and right sides of the rear end of the flat frame, vertical poles are vertically provided at the front and rear ends of the flat frame, a cross bar is provided between the tops of the two vertical poles, a first hook is provided on the right side wall of the cross bar, a pallet frame is provided between the two vertical poles, the pallet frame is located on the left side of the flat frame, an auxiliary material frame is provided on the right side of the flat frame, a plurality of U-shaped baffles are arranged at intervals in the auxiliary material frame, a front guide plate is provided at the front end of the flat frame, a hook is provided on the front guide plate forwardly, a rear guide plate is provided at the rear end of the flat frame, and a lock buckle is provided on the rear guide plate backwardly, the lock buckle comprises: a guide plate, an upper slot is provided on the rear end wall of the guide plate, a through hole, a first pin shaft and an arc are provided on the guide plate The latch assembly is mounted on a rear portion of the guide plate, and the latch assembly is mounted on a rear portion of the guide plate, wherein the latch assembly is mounted on a rear portion of the guide plate, wherein the latch assembly is mounted on a rear portion of the guide plate.

2. The feeding trolley cooperating with the towing type AGV according to claim 1, characterized in that: A rotating shaft is provided in the front guide plate, and a brake plate is rotatably provided on the rotating shaft. The top wall and the front side wall of the end portion where the brake plate is connected to the rotating shaft are transitionally connected by an arc surface, and the center of the arc surface is located on the central axis of the rotating shaft. The top wall and the rear side wall of the end portion are connected by a right angle. A shift plate is provided in the front guide plate located above the brake plate, and a pushing electric cylinder capable of pushing the brake plate is provided on the shift plate.

3. The feeding trolley cooperating with the towing AGV according to claim 2, wherein: A first limiting portion is folded outward on the left and right side walls of the front guide plate, and a second limiting portion is folded outward on the left and right side walls of the rear guide plate.

4. The feeding trolley cooperating with the towing type AGV according to claim 3, characterized in that: The connection structure between the guide plate and the rear guide plate is as follows: a connecting plate is welded on the rear guide plate, two through holes are provided on the connecting plate, a fixing plate is welded on the front end of the guide plate, rib plates are welded on the left and right sides of the guide plate respectively, the two rib plates are welded to the fixing plate, two long holes are provided on the fixing plate, the fixing plate is abutted against the connecting plate, the two long holes are aligned one by one with the two through holes respectively, and bolts are passed between the relatively aligned long holes and the through holes.

5. The feeding trolley cooperating with the towing type AGV according to claim 1, characterized in that: A hook-increasing frame is arranged on the right side wall of the crossbar, a plurality of second hooks are arranged at intervals on the hook-increasing frame, and a plurality of third hooks are arranged at intervals on the right side wall of the tray frame.

6. The feeding trolley cooperating with the towed AGV according to claim 1, characterized in that: Annular push handles are provided at the front and rear ends of the cross bar.

7. The feeding trolley cooperating with the towing AGV according to claim 1, characterized in that: The upper clamping groove on the guide plate and the rear end wall are connected through a smooth transition of the arc surface, and the lower clamping groove on the receiving plate and the rear end wall are also connected through a smooth transition of the arc surface.

8. The feeding trolley cooperating with the towing AGV according to claim 1, characterized in that: The guiding plate and the receiving plate are connected by connecting bolts. A spacer sleeve is sleeved on the connecting bolts. The guiding plate and the receiving plate respectively abut against both ends of the spacer sleeve. Two T-shaped rotating sleeves are further arranged between the guiding plate and the receiving plate. The lower end of the T-shaped rotating sleeve abuts on the receiving plate, and the upper end of the T-shaped rotating sleeve is inserted into the guiding plate. A connecting bolt is inserted into the T-shaped rotating sleeve. The baffle plate and the hook plate are respectively rotatably sleeved in the two T-shaped rotating sleeves. The axis of the T-shaped rotating sleeve sleeved with the hook plate is concentric with the center of the arc-shaped hole. A gasket is sleeved on the T-shaped rotating sleeve. The gaskets on the two T-shaped rotating sleeves are respectively located above the baffle plate and the hook plate.

Images