A safety unloading door lock catch device
By using a motor-driven threaded rod system and suction cup fixation, the problem of difficult and unsafe opening of the grain unloading truck when it is full of grain has been solved, enabling safe and efficient grain unloading operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN QINGLIU COUNTY GRAIN PURCHASE & SALES CO LTD
- Filing Date
- 2025-09-22
- Publication Date
- 2026-06-23
AI Technical Summary
In existing technologies, opening the doors of grain storage vehicles when they are full is laborious and poses safety hazards. Existing devices cannot unload grain efficiently, resulting in low work efficiency.
The system employs a motor-driven threaded rod system, which drives the sliding collar to open the movable rod and straight rod to insert into the door latch. Combined with suction cup fixation, this achieves stable operation and prevents grain leakage.
It achieves a safe and efficient grain unloading process, avoiding manpower consumption and safety hazards, and improving operational convenience and work efficiency.
Smart Images

Figure CN224394082U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of door lock latching devices, and in particular to a safe grain unloading door lock latching device. Background Technology
[0002] The safe unloading door lock device is a safety device used in the process of unloading grain into the warehouse. During the storage, processing and transportation of grain, grain warehouses, silos, unloading ports and transport vehicles (such as bulk grain trucks, containers, etc.) are usually equipped with openable warehouse doors or unloading ports to facilitate grain loading and unloading operations.
[0003] The existing patent number is CN206267680U, which discloses a door lock device for a van, including a wrench, a locking rod, and a wrench seat. The wrench seat is fitted onto the locking rod, and there are locking blocks at both ends of the wrench seat on the locking rod. The wrench is movably mounted on the wrench seat, and the end of the wrench is bent. The wrench is placed on a handle seat, and a lock hole seat is movably mounted on one end of the handle seat. The lock hole seat has a plurality of first lock holes, and a plurality of second lock holes are opened at the other end of the handle seat. A fixing plate extends from the lower end of the handle seat, and a lock is fixed on the fixing plate. A bolt is provided inside the lock, and the bolt passes through the first lock holes and the second lock holes.
[0004] In the above solution, although a locking bar is used to lock the truck, and the fixing plate on the handle seat is fixed to the lock, which makes installation and operation more convenient and prevents errors during installation from causing the truck to fail to lock, when the truck is full of grain, the grain inside will pile up at the door. When the staff tries to open the door directly by hand, the impact inside can cause instantaneous injury to the staff opening the door. If other tools are used to assist in opening the door, it will consume a lot of manpower and resources and reduce work efficiency. Utility Model Content
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a safe grain unloading door locking device, comprising: a support plate, a fixed plate fixedly installed on one side of the support plate, a motor fixedly installed on the outer surface of the fixed plate, a threaded rod fixedly connected to the output shaft of the motor, a movable collar movably sleeved on the outer surface of the threaded rod, a movable groove formed on the inner surface of the center of the support plate, a guide post provided inside the movable groove, the bottom of the movable collar slidably connected to the outer surface of the guide post, round shafts fixedly connected to the inner surfaces of the support plate near both sides, limit rods movably connected to the top of the two round shafts, movable rod one movably connected to the top of the movable collar near both sides, the two limit rods movably connected to the outer surfaces of the two movable rods one, a straight rod movably connected to one end of the two movable rods one, and movable rod two movably connected to the two sides of the movable collar near one side, the two movable rods two movably connected to the outer surfaces of the two straight rods.
[0006] The technical effect of adopting the above-mentioned further solution is as follows: when the motor is started, the output shaft of the motor drives the threaded rod to rotate. The rotation of the threaded rod will cause the movable ring to slide on its outer surface. At this time, the bottom of the movable ring will slide back and forth on the guide post, making the movable ring more stable when sliding. When the movable ring slides forward, the movable rod one and movable rod two on both sides will open to both sides under the movable connection of the limit rod. At this time, the straight rod will also open to both sides.
[0007] In a preferred embodiment, the other end of both straight rods can be detachably connected with a buckle.
[0008] The technical advantage of adopting the above-mentioned further solution is that the buckle is used to install on the door. When in use, the straight rod can be inserted into the buckle for direct use, and the entire device can also be carried more conveniently.
[0009] In a preferred embodiment, a connecting block is fixedly installed at the bottom of each of the two buckles, and a limit block is fixedly connected to the opposite side of each of the two connecting blocks.
[0010] The technical effect of adopting the above-mentioned further solution is that the connecting block is used to lock the silo door, preventing the silo door panel from opening by itself and causing grain to leak out.
[0011] In a preferred embodiment, telescopic strips are fixedly installed on opposite sides of the two connecting blocks, a handle is fixedly installed on the top of the fixing plate, and L-shaped support frames are fixedly connected to both sides of the handle. The other side of the two L-shaped support frames is fixedly connected to both sides of the support plate.
[0012] The technical effect of adopting the above-mentioned further solution is that the handle and L-shaped support frame are used to connect the fixed plate and the support plate, and the handle makes it easy for the staff to hold the support plate and fit it against the door.
[0013] In a preferred embodiment, two suction cups are fixedly installed on the bottom of the support plate.
[0014] The technical effect of adopting the above-mentioned further solution is that the suction cup is used to adhere to the compartment door, enabling the equipment to be fixed for operation.
[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0016] In use, when the motor is started, the output shaft of the motor drives the threaded rod to rotate. The rotation of the threaded rod causes the movable ring to slide on its outer surface. At this time, the bottom of the movable ring will slide back and forth on the guide post, making the sliding of the movable ring more stable. When the movable ring slides forward, the movable rod one and movable rod two on both sides will open to both sides under the movable connection of the limiting rod. At this time, the straight rod will also open to both sides. Because the straight rod is fixedly connected to the buckle, the opening of the buckle on both sides causes the limiting block to release part of the restriction on the door lock. The telescopic bar is also stretched to a certain distance at this time, and the grain accumulated inside the grain cart at the door is sprayed out.
[0017] In this invention, when in use, the suction cup is pressed to completely adhere to the outer surface of the door for fixation, and then the two straight rods are inserted into the buckle on the door lock for fixation. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of a safe grain unloading door locking device proposed in this utility model;
[0019] Figure 2 This is a side view of the structure of a safe grain unloading door locking device proposed in this utility model;
[0020] Figure 3 This is a side-tilt structure diagram of a safe grain unloading door locking device proposed in this utility model;
[0021] Figure 4 This is a schematic diagram of the guide column of a safe grain unloading door locking device proposed in this utility model.
[0022] Legend: 101, Support plate; 102, Fixed plate; 103, Motor; 104, Threaded rod; 105, Moving collar; 106, Movable groove; 107, Suction cup; 108, Guide column; 109, Round shaft; 110, Limiting rod; 111, Movable rod one; 112, Movable rod two; 113, Straight rod; 114, Buckle; 115, Connecting block; 116, Limiting block; 117, Telescopic strip; 118, Handle; 119, L-shaped support frame. Detailed Implementation
[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0025] Please see Figures 1 to 4 This utility model provides a safe grain unloading door locking device, including: a support plate 101, a fixing plate 102 fixedly installed on one side of the support plate 101, a motor 103 fixedly installed on the outer surface of the fixing plate 102, a threaded rod 104 fixedly connected to the output shaft of the motor 103, a movable collar 105 movably sleeved on the outer surface of the threaded rod 104, a movable groove 106 opened on the inner surface of the center of the support plate 101, a guide post 108 provided inside the movable groove 106, the bottom of the movable collar 105 slidably connected to the outer surface of the guide post 108, round shafts 109 fixedly connected to the inner surfaces of the support plate 101 near both sides, limit rods 110 movably connected to the top of the two round shafts 109, and movable rods 111 movably connected to the top of the movable collar 105 near both sides. 10 is movably connected to the outer surface of two movable rods 111. One end of each movable rod 111 is movably connected to a straight rod 113. Movable ring 105 is movably connected to two movable rods 112 on both sides near one side. The two movable rods 112 are movably connected to the outer surface of the two straight rods 113. When the motor 103 is started, the output shaft of the motor 103 drives the threaded rod 104 to rotate. The rotation of the threaded rod 104 will cause the movable ring 105 to slide on its outer surface. At this time, the bottom of the movable ring 105 will slide back and forth on the guide post 108, making the sliding of the movable ring 105 more stable. When the movable ring 105 slides forward, the movable rods 111 and 112 on both sides will open to both sides under the movable connection of the limiting rod 110. At this time, the straight rod 113 will also open to both sides.
[0026] like Figures 1 to 4 As shown, the other end of each of the two straight rods 113 can be detachably connected to a buckle 114. The buckle 114 is used to install on the door. When in use, the straight rod 113 can be inserted into the buckle 114 for direct use, and it is also more convenient to carry the entire device.
[0027] like Figures 1 to 4 As shown, a connecting block 115 is fixedly installed at the bottom of each of the two buckles 114. A limit block 116 is fixedly connected to the opposite side of each of the two connecting blocks 115. The connecting block 115 is used to lock the silo door to prevent the silo door panel from opening by itself, which would cause the grain to leak out.
[0028] like Figures 1 to 4As shown, telescopic strips 117 are fixedly installed on opposite sides of the two connecting blocks 115, and handles 118 are fixedly installed on the top of the fixing plate 102. L-shaped support frames 119 are fixedly connected to both sides of the handles 118, and the other side of the two L-shaped support frames 119 is fixedly connected to both sides of the support plate 101. The handles 118 and L-shaped support frames 119 are used to connect the fixing plate 102 and the support plate 101. The handles 118 make it easy for workers to hold the support plate 101 and fit it against the door.
[0029] like Figure 3 As shown, two suction cups 107 are fixedly installed on the bottom of the support plate 101. The suction cups 107 are used to adhere to the door so that the equipment can be fixed for operation.
[0030] The working principle of this utility model is as follows: During use, pushing the handle 118 causes the suction cup 107 to fully adhere to the outer surface of the door for fixation. Then, the two straight rods 113 are inserted into the latches 114 on the door lock for fixation. Starting the motor 103 causes the output shaft of the motor 103 to drive the threaded rod 104 to rotate. The rotation of the threaded rod 104 causes the movable collar 105 to slide on its outer surface. At this time, the bottom of the movable collar 105 will slide back and forth on the guide post 108, making the sliding of the movable collar 105 more stable. When the movable collar 105 slides forward... When the movable rods 111 and 112 on both sides are connected by the limit rod 110, they will open to both sides. At this time, the straight rod 113 will also open to both sides. Because the straight rod 113 is fixedly connected to the buckle 114, the buckle 114 opens to both sides, causing the limit block 116 to release part of the restriction on the door lock. The telescopic bar 117 will also be stretched to a certain distance. At this time, the grain accumulated inside the grain car at the door will be sprayed out, preventing the staff from being injured when pulling the door. After the grain accumulated at the door is unloaded, the door lock can be completely opened for unloading.
[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.
Claims
1. A safe grain unloading door locking device, comprising: A support plate (101) is characterized in that: a fixing plate (102) is fixedly installed on one side of the support plate (101), a motor (103) is fixedly installed on the outer surface of the fixing plate (102), a threaded rod (104) is fixedly connected to the output shaft of the motor (103), a movable collar (105) is movably sleeved on the outer surface of the threaded rod (104), a movable groove (106) is opened on the inner surface of the center of the support plate (101), a guide post (108) is provided inside the movable groove (106), and the bottom of the movable collar (105) is slidably connected to the outer surface of the guide post (108). 01) Round shafts (109) are fixedly connected to the inner surfaces near both sides. Limiting rods (110) are movably connected to the top of the two round shafts (109). Movable rods (111) are movably connected to the top of the movable collar (105) near both sides. The two limiting rods (110) are movably connected to the outer surfaces of the two movable rods (111). A straight rod (113) is movably connected to one end of the two movable rods (111). Movable rods (112) are movably connected to both sides of the movable collar (105) near one side. The two movable rods (112) are movably connected to the outer surfaces of the two straight rods (113).
2. The safe grain unloading door locking device according to claim 1, characterized in that: The other end of each of the two straight rods (113) is detachably connected to a buckle (114).
3. The safe grain unloading door locking device according to claim 2, characterized in that: A connecting block (115) is fixedly installed at the bottom of each of the two buckles (114), and a limit block (116) is fixedly connected to the opposite side of each of the two connecting blocks (115).
4. The safe grain unloading door locking device according to claim 3, characterized in that: Telescopic strips (117) are fixedly installed on opposite sides of the two connecting blocks (115).
5. A safe grain unloading door locking device according to claim 4, characterized in that: A handle (118) is fixedly installed on the top of the fixed plate (102), and L-shaped support frames (119) are fixedly connected to both sides of the handle (118). The other side of the two L-shaped support frames (119) is fixedly connected to both sides of the support plate (101).
6. The safe grain unloading door locking device according to claim 5, characterized in that: Two suction cups (107) are fixedly installed on the bottom of the support plate (101).