A high-safety, universal double-girder gantry crane

Abstract

This utility model discloses a high-safety, universal double-girder gantry crane, comprising a double-girder gantry frame. A PLC controller and a buzzer alarm are sequentially installed on the double-girder gantry frame. A first electromagnetic brake motor is evenly installed at the top of the double-girder gantry frame, and the output end of the first electromagnetic brake motor is connected to a ball screw. During operation, the user can change to a suitable-sized cargo net according to the size and specifications of the goods, utilizing the installation of fixed hanging rings and fixed hooks. During subsequent lifting operations, the goods only need to be placed inside the cargo net. Compared to the current cargo hook structure connected to a traction rope, this design is more versatile. It can be used to load goods that are not secured with straps for connecting to cargo hooks, as well as long, irregularly shaped goods. This gives the device a universal cargo-carrying structure, strong applicability, and ease of promotion.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, specifically a high-safety universal double-girder gantry crane. Background Technology

[0002] Double girder gantry cranes have become indispensable heavy equipment in the industrial field due to their high load capacity, flexible mobility and environmental adaptability. They play a key material handling role, especially in industries such as logistics, manufacturing and energy. They are suitable for indoor environments such as factory workshops and warehouses. However, there are still some problems when this type of lifting equipment is actually in operation.

[0003] The horizontal and vertical travel structures of current double-girder gantry cranes often continue to slide a distance due to inertia after closing, and it is also difficult to detect and provide feedback on the lifted weight. This makes the device prone to collisions and breakage, resulting in insufficient safety performance. Furthermore, its cargo-carrying structure is often only connected by cargo hooks and straps on the outer wall of the cargo, making it inconvenient to load goods that are not secured with straps to connect to the cargo hooks, or to load excessively long goods. It has poor versatility, is not easy to promote, and cannot meet the lifting requirements of different goods. Based on this, we propose a new type of high-safety, universal double-girder gantry crane. Utility Model Content

[0004] The purpose of this utility model is to provide a high-safety, universal double-girder gantry crane to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-safety universal double-girder gantry crane, comprising a double-girder gantry frame, on which a PLC controller and a buzzer alarm are sequentially installed; a first electromagnetic brake motor is evenly installed at the top of the double-girder gantry frame, the output end of the first electromagnetic brake motor is connected to a ball screw, a nut seat is helically fitted on the ball screw, and a transverse drive base plate is fixed between adjacent nut seats; a first telescopic cylinder matching the ball screw is installed at the top of the double-girder gantry frame; and a vertical electric hoist is installed at the bottom of the transverse drive base plate. The vertical electric hoist has a traction rope at its output end, a tension sensor at the bottom of the traction rope, and an installation cylinder at the bottom of the tension sensor. Installation ropes are evenly tied to the installation cylinder, and a cargo net is connected to the bottom of the installation rope. Ground tracks are provided at both ends of the double-beam portal frame. Longitudinal walking housings are provided at the four corners of the bottom of the double-beam portal frame. Electric wheels matching the ground tracks are movably connected to the bottom of the longitudinal walking housing. A second telescopic cylinder is fixed to the outer wall of the longitudinal walking housing, and a rubber anti-slip foot is connected to the output end of the second telescopic cylinder.

[0006] Preferably, there are two of each of the first telescopic cylinder and the first electromagnetic brake motor.

[0007] Preferably, the top two sides of the double-beam portal frame are provided with limiting slide cavities that match the ball screw and nut seat, and the limiting slide cavities and the nut seat form a sliding connection.

[0008] Preferably, the output end of the first telescopic cylinder extends laterally through one end of the double-beam portal frame and into the interior of the limiting slide cavity, and the adjacent limiting slide cavities are symmetrically distributed about the vertical center line of the double-beam portal frame.

[0009] Preferably, there are 8 installation ropes, and the installation cylinder and the carrying net bag both form a detachable and detachable installation structure with the installation ropes.

[0010] Preferably, the top edge of the carrying net is provided with fixing rings evenly distributed, and the installation rope is provided with fixing hooks that match the fixing rings.

[0011] Preferably, the top of the carrying net is fixed with a silicone rubber reinforcing strip.

[0012] Preferably, a drive unit is fixed to the bottom end of the double-beam portal frame, and a second electromagnetic brake motor is installed inside the drive unit. A reducer connected to the electric vehicle wheel is installed at the output end of the second electromagnetic brake motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) The high-safety general-purpose double-girder gantry crane optimizes its performance by installing a PLC controller, etc. On the one hand, the two first electromagnetic brake motors symmetrically installed on the top of the double-girder gantry frame, together with the corresponding ball screw and nut seat, can drive the horizontal drive base plate and the goods to move horizontally automatically. After moving to the corresponding horizontal position, the first electromagnetic brake motor is turned off. Based on its own electromagnetic self-locking protection, it ensures that the ball screw is not easy to rotate and loosen. The first telescopic cylinder will open simultaneously, and its output end will extend and press the tail end of the ball screw, further improving the stability of the ball screw. Furthermore, the second electromagnetic brake motor inside the drive box fixed on the double-girder gantry frame starts. With the deceleration transmission of the reducer, it can drive the electric wheel at the bottom of the longitudinal travel housing to rotate. This allows the electric wheel to move inside the ground track fixed by screws on the operating ground, which facilitates the horizontal movement of goods. When the device moves to a suitable transport position, the PLC controller activates the second telescopic cylinder, causing its output rubber anti-slip feet to press down onto the ground for locking. This active braking locking structure and the electromagnetic self-locking protection of the second electromagnetic brake motor provide double locking protection for the device's horizontal and longitudinal drive structure, mitigating safety hazards caused by the electric vehicle wheels loosening due to inertia. Simultaneously, the vertical electric hoist can be activated to rewind the traction rope, lifting the cargo net and its contents upwards. During this process, the tension sensor monitors the tension value in real time and feeds the data back to the PLC controller. When the weight of the cargo exceeds a preset safety value, the PLC controller activates a buzzer alarm to alert personnel. This dual locking protection structure of the lifting tension monitoring structure and the horizontal travel drive mechanism enhances the stability and safety of the device during operation, achieving a high level of safety.

[0015] (2) The high-safety universal double-girder gantry crane optimizes its structure by installing a cargo net, etc. Users can replace the cargo net with a suitable size according to the size and specifications of the goods by using the installation function of the fixed hanging ring and fixed hook. During subsequent lifting operations, the goods only need to be placed inside the cargo net. Compared with the current cargo hook structure that connects to the traction rope, it has stronger versatility. It can be used to load goods that are not tied with straps to connect to the cargo hook, as well as long and irregularly shaped goods. This makes the device have a universal cargo structure, strong applicability, and easy to promote. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present invention;

[0017] Figure 2 This is a partial cross-sectional view of the present invention from below;

[0018] Figure 3 This is a front view structural diagram of the vertical electric hoist of this utility model;

[0019] Figure 4 This is a front view cross-sectional structural diagram of the drive unit box of this utility model;

[0020] Figure 5 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0021] In the diagram: 1. Double-beam portal frame; 2. Vertical electric hoist; 3. Loading net; 4. PLC controller; 5. Buzzer alarm; 6. Drive housing; 7. First telescopic cylinder; 8. Limiting slide cavity; 9. Ball screw; 10. Lateral drive base plate; 11. Nut seat; 12. First electromagnetic brake motor; 13. Traction rope; 14. Installation rope; 15. Tension sensor; 16. Fixed hanging ring; 17. Fixed hook; 18. Installation cylinder; 19. Second electromagnetic brake motor; 20. Reducer; 21. Second telescopic cylinder; 22. Rubber anti-slip feet; 23. Electric vehicle wheel; 24. Ground track; 25. Longitudinal walking housing. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-5 An embodiment of this utility model is provided: a high-safety universal double-beam gantry crane, including a double-beam gantry frame 1, a PLC controller 4 and a buzzer alarm 5 are installed sequentially on the double-beam gantry frame 1, a first electromagnetic brake motor 12 is evenly installed at the top of the double-beam gantry frame 1, a ball screw 9 is connected to the output end of the first electromagnetic brake motor 12, a nut seat 11 is spirally fitted on the ball screw 9, a transverse drive base plate 10 is fixed between adjacent nut seats 11, and a first telescopic cylinder 7 matching the ball screw 9 is installed at the top of the double-beam gantry frame 1;

[0024] In use, the two first electromagnetic brake motors 12 symmetrically installed on the top of the double beam portal frame 1 are activated. Together with the corresponding ball screw 9 and nut seat 11, they form a transmission action that can drive the transverse drive base plate 10 and the goods to move automatically horizontally. After moving to the corresponding horizontal position, the first electromagnetic brake motors 12 are turned off. Based on its own electromagnetic self-locking protection, it is ensured that the ball screw 9 is not easy to rotate and loosen. At the same time, the first telescopic cylinder 7 will open, and its output end will extend and press the tail end of the ball screw 9, further improving the stability of the ball screw 9.

[0025] A vertical electric hoist 2 is installed at the bottom of the horizontal drive base plate 10. A traction rope 13 is provided at the output end of the vertical electric hoist 2. A tension sensor 15 is installed at the bottom of the traction rope 13. An installation cylinder 18 is installed at the bottom of the tension sensor 15.

[0026] Installation ropes 14 are evenly tied to the installation cylinder 18, and a cargo net 3 is connected to the bottom of the installation ropes 14.

[0027] Eight installation ropes 14 are provided, and the installation cylinder 18 and the cargo net 3 are both connected to the installation ropes 14 to form a disassembly and installation structure.

[0028] The top edge of the cargo net bag 3 is evenly provided with fixing rings 16, and the installation rope 14 is provided with fixing hooks 17 that match the fixing rings 16.

[0029] The top of the cargo net 3 is fixed with a silicone rubber reinforcing strip;

[0030] When in use, the user can replace the cargo net bag 3 of an appropriate size according to the size and specifications of the goods by using the installation function of the fixed hanging ring 16 and the fixed hook 17. During subsequent lifting operations, the goods only need to be placed inside the cargo net bag 3. Compared with the current cargo hook structure that connects to the towing rope 13, it has stronger versatility. It can be used to load goods that are not tied with straps to connect to the cargo hook, as well as long and irregularly shaped goods. This makes the device have a universal cargo structure and strong applicability.

[0031] Both ends of the double beam portal frame 1 are equipped with ground tracks 24. The four corners at the bottom of the double beam portal frame 1 are equipped with longitudinal walking housings 25. The bottom of the longitudinal walking housing 25 is movably connected to electric vehicle wheels 23 that match the ground tracks 24. The outer wall of the longitudinal walking housing 25 is fixed with a second telescopic cylinder 21. The output end of the second telescopic cylinder 21 is connected to a rubber anti-slip foot 22.

[0032] The bottom end of the double beam portal frame 1 is fixed with a drive box 6. The drive box 6 is equipped with a second electromagnetic brake motor 19. The output end of the second electromagnetic brake motor 19 is equipped with a reducer 20 connected to the electric vehicle wheel 23.

[0033] In use, the second electromagnetic brake motor 19 inside the drive box 6 fixed on the double beam portal frame 1 starts, and with the deceleration transmission of the reducer 20, it can drive the electric wheel 23 at the bottom of the longitudinal walking housing 25 to rotate. This allows the electric wheel 23 to move inside the ground track 24 fixed by screws on the operating ground, which facilitates the horizontal and longitudinal movement of goods and products. When it moves to a suitable handling position, the PLC controller 4 controls the second telescopic cylinder 21 to start, which drives the rubber anti-slip foot 22 at its output end to press down to the ground for locking and fixing. Then, through the active braking locking structure and the electromagnetic self-locking protection effect of the second electromagnetic brake motor 19, the device achieves double locking protection for the horizontal and longitudinal drive structure of the device, reducing the safety hazards caused by the loosening of the electric wheel 23 due to inertial offset.

[0034] Two of each of the first telescopic cylinder 7 and the first electromagnetic brake motor 12 are provided;

[0035] The top two sides of the double beam portal frame 1 are equipped with limiting slide cavities 8 that match the ball screw 9 and nut seat 11. The limiting slide cavity 8 and the nut seat 11 form a sliding connection.

[0036] The output end of the first telescopic cylinder 7 extends laterally through one end of the double beam portal frame 1 and into the interior of the limiting slide cavity 8. The adjacent limiting slide cavities 8 are symmetrically distributed about the vertical center line of the double beam portal frame 1.

[0037] In this embodiment, when in use: With an external power supply, the user can first replace the cargo net 3 with a suitable size according to the size and specifications of the goods, utilizing the installation of the fixed hanging ring 16 and fixed hook 17. During subsequent lifting operations, simply place the goods inside the cargo net 3. Compared to the current cargo hook structure connected to the traction rope 13, this design is more versatile. It can be used to load goods that are not secured with straps for connecting to the cargo hook, as well as longer, irregularly shaped goods. This gives the device a universal cargo-carrying structure and strong applicability. In actual operation, the two symmetrically installed at the top of the double-beam portal frame 1 are activated. The first electromagnetic brake motor 12, in conjunction with the corresponding ball screw 9 and nut seat 11, forms a transmission mechanism that drives the lateral drive base plate 10 and the goods to move horizontally automatically. After moving to the corresponding horizontal position, the first electromagnetic brake motor 12 shuts off. Based on its own electromagnetic self-locking protection, it ensures that the ball screw 9 is not prone to rotational loosening. Simultaneously, the first telescopic cylinder 7 opens, with its output end extending and pressing against the tail end of the ball screw 9, further improving the stability of the ball screw 9. Furthermore, the second electromagnetic brake motor 19 inside the drive housing 6 fixed on the double beam portal frame 1 starts, cooperating with the reducer 20 to reduce the speed of the transmission. The device can drive the electric wheel 23 at the bottom of the longitudinal walking housing 25 to rotate, allowing the electric wheel 23 to move within the ground track 24 fixed by screws on the operating ground. This facilitates the horizontal and longitudinal movement of goods. When the goods are moved to a suitable handling position, the PLC controller 4 controls the second telescopic cylinder 21 to start, causing its output end rubber anti-slip foot 22 to press down and lock the device in place. Through this active braking locking structure and the electromagnetic self-locking protection effect of the second electromagnetic brake motor 19, the device achieves double locking protection for the horizontal and longitudinal drive structure, reducing the weight of the electric wheel. 23. Safety hazards caused by inertial offset and loosening. Secondly, the vertical electric hoist 2 is started, which can drive the traction rope 13 to wind up and lift the cargo net 3 and the goods inside it upward. During this process, the tension sensor 15 will monitor the tension value in real time and feed the monitored data back to the PLC controller 4. When the weight of the goods exceeds the preset safety value, the PLC controller 4 will control the buzzer alarm 5 to sound an alarm to remind the staff. In this way, the stability and safety of the device during operation are improved through the double locking protection structure of the lifting tension monitoring structure and the horizontal walking drive mechanism, realizing the advantage of high safety use.

Claims

1. A high-safety, universal double-girder gantry crane, characterized in that, The system includes a double-beam portal frame (1), on which a PLC controller (4) and a buzzer alarm (5) are installed in sequence. A first electromagnetic brake motor (12) is evenly installed at the top of the double-beam portal frame (1). A ball screw (9) is connected to the output end of the first electromagnetic brake motor (12). A nut seat (11) is spirally fitted onto the ball screw (9). A horizontal drive base plate (10) is fixed between adjacent nut seats (11). A first telescopic cylinder (7) matching the ball screw (9) is installed at the top of the double-beam portal frame (1). A vertical electric hoist (2) is installed at the bottom of the horizontal drive base plate (10). A traction rope (13) is provided at the output end of the vertical electric hoist (2). A tension sensor (15) is installed at the bottom of the 13), and an installation cylinder (18) is installed at the bottom of the tension sensor (15). An installation rope (14) is evenly tied on the installation cylinder (18). A cargo net (3) is connected to the bottom of the installation rope (14). Ground tracks (24) are provided at both ends of the double beam portal frame (1). A longitudinal walking housing (25) is provided at the four corners of the bottom of the double beam portal frame (1). An electric vehicle wheel (23) matching the ground track (24) is movably connected to the bottom of the longitudinal walking housing (25). A second telescopic cylinder (21) is fixed on the outer wall of the longitudinal walking housing (25). A rubber anti-slip foot (22) is connected to the output end of the second telescopic cylinder (21).

2. The high-safety universal double-girder gantry crane according to claim 1, characterized in that: Two of each of the first telescopic cylinder (7) and the first electromagnetic brake motor (12) are provided.

3. A high-safety universal double-girder gantry crane according to claim 1, characterized in that: The double beam portal frame (1) has a limiting slide cavity (8) on both sides of the top, which matches the ball screw (9) and nut seat (11). The limiting slide cavity (8) and the nut seat (11) form a sliding connection.

4. A high-safety universal double-girder gantry crane according to claim 3, characterized in that: The output end of the first telescopic cylinder (7) extends laterally through one end of the double beam portal frame (1) and into the interior of the limiting slide cavity (8). The adjacent limiting slide cavities (8) are symmetrically distributed about the vertical center line of the double beam portal frame (1).

5. A high-safety universal double-girder gantry crane according to claim 1, characterized in that: There are 8 installation ropes (14), and the installation cylinder (18) and the cargo net (3) are connected to the installation ropes (14) to form a disassembly and installation structure.

6. A high-safety universal double-girder gantry crane according to claim 1, characterized in that: The top edge of the carrying net (3) is evenly provided with fixing rings (16), and the mounting rope (14) is provided with fixing hooks (17) that match the fixing rings (16).

7. A high-safety universal double-girder gantry crane according to claim 1, characterized in that: The top of the cargo net (3) is fixed with a silicone rubber reinforcing strip.

8. A high-safety universal double-girder gantry crane according to claim 1, characterized in that: The bottom end of the double beam portal frame (1) is fixed with a drive box (6), and the drive box (6) is equipped with a second electromagnetic brake motor (19). The output end of the second electromagnetic brake motor (19) is equipped with a reducer (20) connected to the electric vehicle wheel (23).

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