Double-drive bevel gear hoist

By designing a dual-drive bevel gear starter, using a triangular top plate and a triangular groove structure and a meshing gear driven by a double-head drive motor, the problem of clamping caused by sediment accumulation during the application of the existing opening and closing machine at the exit of the river is solved, and the smooth movement of the gate assembly and the normal operation of the opening and closing machine are achieved.

CN120099917AInactive Publication Date: 2025-06-06YANGZHOU UNIV
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Patent Information

Application Number
CN202510514149.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-23
Publication Date
2025-06-06
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

When existing opening and closing machines are used at river outlets, sediment is prone to accumulate, resulting in the movement of the gate being blocked, and thus damage the opening and closing machines.

Method used

A dual-drive bevel gear starter is designed, which adopts a gate assembly composed of an upper gate plate and a lower gate plate. A triangular top plate is provided at the top of the lower gate plate. The triangle top plate is embedded in a triangle groove at the bottom of the upper gate plate to reduce the obstacles to sediment accumulation, and the double-headed drive motor drives the shaft and bevel gear meshing to achieve the smooth movement of the upper and lower gate plates.

Benefits of technology

It effectively reduces the blocking obstacles of silt and sand on the gate assembly, ensures the normal operation and service life of the starter and shutdown machine, and avoids damage to the jamming machine caused by silt and sand accumulation.

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Abstract

The invention relates to the technical field of hoists, in particular to a double-drive bevel gear hoist which comprises a riverway and a flashboard assembly arranged at an outlet of the riverway, the flashboard assembly comprises an upper flashboard and a lower flashboard, a frame body is fixedly installed on the upper surface of the riverway, and an opening and closing assembly is arranged at the top of the frame body; the gate plate assembly is composed of the upper gate plate and the lower gate plate, the top of the lower gate plate is a triangular top plate, the two sides of the top of the triangular top plate are inclined faces, and the upper gate plate and the lower gate plate are inclined faces. And after the opening and closing assembly drives the upper flashboard to move downwards, the triangular top plate on the lower flashboard is embedded into the triangular groove in the bottom of the upper flashboard, so that a complete flashboard assembly can be formed to block the river channel outlet, and by arranging the triangular top plate and the triangular groove, the blocking effect of the silt on the river channel outlet blocked by the flashboard assembly can be reduced.
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Description

Technical Field

[0001] The invention relates to the technical field of gate hoists, and in particular to a double-drive bevel gear gate hoist. Background Art

[0002] The function of the existing gate hoist is mainly to control the opening and closing of the equipment, such as adjusting the operating status of the gate, valve or pump station, ensuring that the equipment works according to the predetermined program, and providing safety protection and operation recording functions. For example, in water conservancy projects, the gate hoist is often used to control the opening or closing of the gate to achieve the purpose of regulating water flow, controlling water volume, managing water level, and preventing the water level from being too high or too low. The moving stroke of the existing gate hoist is mostly preset in advance according to needs. When the gate hoist is used in conjunction with the gate to control the water flow at the river outlet, and the river water contains a large amount of sand, the silt is easy to accumulate at the bottom of the river. The accumulated silt will hinder the movement of the gate, thereby causing the gate hoist to jam and be damaged. To this end, a double-drive bevel gear gate hoist is proposed. Summary of the invention

[0003] The object of the present invention is to provide a double-drive bevel gear hoist to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dual-drive bevel gear opening and closing machine, comprising a river channel and a gate assembly arranged at the river channel outlet, the gate assembly comprising an upper gate and a lower gate, a frame is fixedly installed on the upper surface of the river channel, an opening and closing assembly is arranged on the top of the frame, the opening and closing assembly drives the upper gate to move up and down at the river channel outlet to control the opening and closing of the river channel outlet, the lower gate is arranged at the bottom of the river channel, and the lower gate is located below the upper gate, a triangular top plate is fixedly connected to the top of the lower gate, and a triangular groove matching the triangular top plate is opened at the bottom of the upper gate.

[0005] Preferably, a groove is provided at the bottom of the inner surface of the river channel, the lower gate plate is adapted to the groove, and a moving component is provided inside the groove, the moving component enables the lower gate plate to move into or out of the groove, and scraping components are provided on both sides of the groove opening, the scraping components are used to clean the triangular top plate.

[0006] Preferably, the opening and closing assembly includes a double-headed drive motor arranged in the middle of the upper surface of the frame, the output shafts at both ends of the double-headed drive motor are fixedly connected to the rotating shaft, and the two sides of the upper surface of the frame are fixedly connected to the support sleeve plates, and the two groups of the rotating shafts are rotatably installed inside the corresponding support sleeve plates, and both ends of the rotating shafts are fixedly connected to the annular plates, and a traction rope is arranged between the two groups of the annular plates, one end of the traction rope is wound around the rotating shaft, and the other end of the traction rope is fixedly connected to the upper gate plate.

[0007] Preferably, mounting plates are fixedly connected to both sides of the bottom of the double-head drive motor, and the mounting plates are connected to the frame through fixing bolts.

[0008] Preferably, the moving assembly includes ball seats fixedly mounted on both sides of the bottom of the lower gate plate, and slide grooves matching the ball seats are opened on both sides of the groove. A screw rod is sleeved inside the ball seat, and the screw rod is rotatably mounted inside the slide groove. The upper end of the screw rod is fixedly connected to a connecting rod, and the upper end of the connecting rod passes through the top of the frame and is fixedly connected to a first bevel gear. The end of the rotating shaft close to the first bevel gear is fixedly connected to a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0009] Preferably, the scraping assembly includes scrapers arranged on both sides of the groove opening, one end of the scraper is inserted into the inside of the groove side wall and fixedly connected to a connecting plate, both sides of the groove side wall are provided with inner grooves adapted to the connecting plate, a first spring is fixedly connected between the connecting plate and the inner groove, a cylinder is fixedly connected to the inside of the inner groove, the cylinder passes through the connecting plate and slides with it, and the first spring is sleeved on the outer surface of the cylinder.

[0010] Preferably, sealing strips are fixedly connected to both sides of the contact surface between the inner groove and the scraper, and the scraper and the sealing strips are slidably sealed.

[0011] Preferably, a hydraulic rod is fixedly installed at the top of the inner surface outlet of the river channel, and a limiting groove matched with the telescopic end of the hydraulic rod is opened on one side of the outer surface of the upper gate plate, and the telescopic end of the hydraulic rod can be moved into or out of the limiting groove.

[0012] Preferably, a cylindrical groove is opened inside the upper gate plate, a guide rod is slidably connected inside the cylindrical groove, the upper end of the guide rod is fixedly connected to the frame, a second spring is sleeved on the outer surface of the guide rod, the upper end of the second spring is fixedly connected to the frame, and the lower end of the second spring is fixedly connected to the upper gate plate.

[0013] Preferably, moving blocks are fixedly connected to both sides of the top of the upper gate plate, and moving grooves adapted to the moving blocks are opened on both sides of the frame body, and the moving blocks are slidably installed inside the corresponding moving grooves.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The gate assembly in the present invention consists of an upper gate and a lower gate, and the top of the lower gate is a triangular top plate, and the two sides of the top of the triangular top plate are inclined surfaces, which are difficult to deposit silt. After the opening and closing assembly drives the upper gate to move downward, the triangular top plate on the lower gate is embedded in the triangular groove at the bottom of the upper gate, thereby forming a complete gate assembly to block the river outlet. By arranging the triangular top plate and the triangular groove, the obstruction of silt to the gate assembly in blocking the river outlet can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 A partial cross-sectional view of the present invention; Figure 4 It is a structural schematic diagram of the opening and closing assembly of the present invention; Figure 5 is a cross-sectional view of the upper gate of the present invention; Figure 6 For the present invention Figure 1 The enlarged view of point A in the middle; Figure 7 For the present invention Figure 3 Enlarged view of point B in the middle.

[0016] In the accompanying drawings, the list of parts represented by each number is as follows: 1 river channel; 2 frame; 3 upper gate; 4 opening and closing assembly, 41 double-headed drive motor; 42 rotating shaft; 43 annular plate; 44 traction rope; 45 support sleeve; 46 mounting plate; 47 fixing bolt; 5 moving assembly, 51 first bevel gear; 52 second bevel gear; 53 connecting rod; 54 slide groove; 55 screw rod; 56 ball seat; 6 moving groove; 7 lower gate; 8 triangular top plate; 9 scraping assembly, 91 connecting plate; 92 inner groove; 93 first spring; 94 cylinder; 95 scraper; 96 sealing strip; 10 hydraulic rod; 11 triangular groove; 12 groove; 13 guide rod; 14 limit groove; 15 moving block; 16 cylindrical groove; 17 second spring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 7 In the figure, a double-drive bevel gear gate opening and closing machine includes a river channel 1 and a gate assembly arranged at the outlet of the river channel 1. The gate assembly includes an upper gate 3 and a lower gate 7. A frame 2 is fixedly installed on the upper surface of the river channel 1. An opening and closing assembly 4 is arranged on the top of the frame 2. The opening and closing assembly 4 drives the upper gate 3 to move up and down at the outlet of the river channel 1 to control the opening and closing of the outlet of the river channel 1. The lower gate 7 is arranged at the bottom of the river channel 1, and the lower gate 7 is located below the upper gate 3. A triangular top plate 8 is fixedly connected to the top of the lower gate 7, and a triangular groove 11 adapted to the triangular top plate 8 is opened at the bottom of the upper gate 3.

[0019] The gate assembly in this embodiment consists of an upper gate plate 3 and a lower gate plate 7, and the top of the lower gate plate 7 is a triangular top plate 8, and the two sides of the top of the triangular top plate 8 are inclined surfaces, which are difficult to deposit silt. After the opening and closing assembly 4 drives the upper gate plate 3 to move downward, the triangular top plate 8 on the lower gate plate 7 is embedded in the triangular groove 11 at the bottom of the upper gate plate 3, thereby forming a complete gate assembly to block the outlet of the river channel 1, and by setting the triangular top plate 8 and the triangular groove 11, the obstruction of silt to the gate assembly in blocking the outlet of the river channel 1 can be reduced.

[0020] Furthermore, a groove 12 is opened at the bottom of the inner surface of the river channel 1, the lower gate plate 7 is adapted to the groove 12, and a moving component 5 is arranged inside the groove 12, the moving component 5 enables the lower gate plate 7 to move into or out of the groove 12, and scraping components 9 are arranged on both sides of the opening of the groove 12, and the scraping components 9 are used to clean the triangular top plate 8.

[0021] In this embodiment, the moving component 5 can drive the lower gate plate 7 to be stored in the groove 12, thereby reducing the obstruction of the lower gate plate 7 to the water flow and ensuring the normal discharge of the water flow inside the river channel 1. By setting up the scraping component 9, the surface of the lower gate plate 7 can be cleaned to ensure that the upper gate plate 3 and the lower gate plate 7 can be normally combined.

[0022] Furthermore, the opening and closing assembly 4 includes a double-headed drive motor 41 arranged in the middle of the upper surface of the frame 2, and the output shafts at both ends of the double-headed drive motor 41 are fixedly connected to the rotating shaft 42, and the support sleeves 45 are fixedly connected to both sides of the upper surface of the frame 2. The two groups of rotating shafts 42 are respectively rotatably installed inside the corresponding support sleeves 45, and both ends of the rotating shaft 42 are fixedly connected to the annular plates 43. A traction rope 44 is arranged between the two groups of annular plates 43, and one end of the traction rope 44 is wound around the rotating shaft 42, and the other end of the traction rope 44 is fixedly connected to the upper gate plate 3.

[0023] Furthermore, mounting plates 46 are fixedly connected to both sides of the bottom of the double-headed driving motor 41 , and the mounting plates 46 are connected to the frame 2 via fixing bolts 47 .

[0024] Furthermore, moving blocks 15 are fixedly connected to both sides of the top of the upper gate plate 3 , and moving grooves 6 adapted to the moving blocks 15 are opened on both sides of the frame body 2 , and the moving blocks 15 are slidably installed inside the corresponding moving grooves 6 .

[0025] Furthermore, a hydraulic rod 10 is fixedly installed at the top of the inner surface outlet of the river channel 1, and a limiting groove 14 adapted to the telescopic end of the hydraulic rod 10 is opened on one side of the outer surface of the upper gate plate 3, and the telescopic end of the hydraulic rod 10 can be moved into or out of the limiting groove 14.

[0026] In this embodiment, when the limit groove 14 on the outer surface of the upper gate plate 3 moves up to be aligned with the telescopic end of the hydraulic rod 10, the hydraulic rod 10 is driven to extend so that the telescopic end of the hydraulic rod 10 is inserted into the limit groove 14, thereby limiting the upper gate plate 3 and ensuring the safety of the river channel 1 outlet when it is opened.

[0027] Furthermore, a cylindrical groove 16 is opened inside the upper gate plate 3, and a guide rod 13 is slidably connected inside the cylindrical groove 16. The upper end of the guide rod 13 is fixedly connected to the frame body 2. A second spring 17 is sleeved on the outer surface of the guide rod 13. The upper end of the second spring 17 is fixedly connected to the frame body 2, and the lower end of the second spring 17 is fixedly connected to the upper gate plate 3.

[0028] In this embodiment, when the opening and closing assembly 4 drives the upper gate plate 3 to move upward, the second spring 17 is compressed, and when the opening and closing assembly 4 drives the upper gate plate 3 to move downward, the compressed second spring 17 is extended to further push the upper gate plate 3 to move downward.

[0029] In this embodiment, the double-headed drive motor 41 is used to drive the rotating shaft 42 to rotate forward and reverse to realize the winding or unwinding of the traction rope 44. When the double-headed drive motor 41 drives the rotating shaft 42 to rotate forward to wind up the traction rope 44, it can drive the upper gate plate 3 to move upward to open the outlet of the river channel 1; when the double-headed drive motor 41 drives the rotating shaft 42 to rotate reversely to unwind the traction rope 44, it can drive the upper gate plate 3 to move downward to block the outlet of the river channel 1.

[0030] Furthermore, the moving component 5 includes ball seats 56 fixedly installed on both sides of the bottom of the lower gate plate 7, and slide grooves 54 compatible with the ball seats 56 are opened on both sides of the groove 12. A screw rod 55 is sleeved inside the ball seat 56, and the screw rod 55 is rotatably installed inside the slide groove 54. The upper end of the screw rod 55 is fixedly connected to a connecting rod 53, and the upper end of the connecting rod 53 passes through the top of the frame 2 and is fixedly connected to the first bevel gear 51. The end of the rotating shaft 42 close to the first bevel gear 51 is fixedly connected to the second bevel gear 52, and the first bevel gear 51 is meshed with the second bevel gear 52.

[0031] In this embodiment, when the double-headed driving motor 41 drives the rotating shaft 42 to rotate forward and move the upper gate plate 3 upward, the second bevel gear 52 located at the end of the rotating shaft 42 also rotates accordingly. Since the second bevel gear 52 is meshingly arranged with the first bevel gear 51, when the second bevel gear 52 rotates, the first bevel gear 51 also rotates accordingly, and the screw rod 55 connected to the first bevel gear 51 through the connecting rod 53 also rotates accordingly, and the ball seat 56 mounted on the screw rod 55 moves downward, thereby driving the lower gate plate 7 and the triangular top plate 8 on the top of the lower gate plate 7 to move into the groove 12, so that the lower gate plate 7 and the triangular top plate 8 will not form an obstacle to the water flow, ensuring that the obstacle can be discharged normally from the outlet of the river channel 1.

[0032] Similarly, when the double-headed driving motor 41 drives the rotating shaft 42 to reverse and move the upper gate plate 3 downward, the second bevel gear 52 located at the end of the rotating shaft 42 also rotates accordingly. Since the second bevel gear 52 is meshingly arranged with the first bevel gear 51, when the second bevel gear 52 rotates, the first bevel gear 51 also rotates accordingly, and the screw rod 55 connected to the first bevel gear 51 through the connecting rod 53 also rotates accordingly, and the ball seat 56 mounted on the screw rod 55 moves upward, thereby driving the lower gate plate 7 and the triangular top plate 8 on the top of the lower gate plate 7 to move out of the groove 12, so that the upper gate plate 3 and the lower gate plate 7 can be combined.

[0033] It should be noted that the differential ratio between the first bevel gear 51 and the second bevel gear 52 can be set according to actual conditions, that is, it can ensure that when the upper gate plate 3 is opened, the lower gate plate 7 is just moved into the groove 12; when the upper gate plate 3 is closed, the lower gate plate 7 is just moved out of the groove 12.

[0034] Furthermore, the scraping assembly 9 includes scrapers 95 arranged on both sides of the opening of the groove 12, one end of the scraper 95 is inserted into the side wall of the groove 12 and fixedly connected to a connecting plate 91, both sides of the side wall of the groove 12 are provided with inner grooves 92 adapted to the connecting plate 91, a first spring 93 is fixedly connected between the connecting plate 91 and the inner groove 92, a cylinder 94 is fixedly connected to the inner groove 92, the cylinder 94 passes through the connecting plate 91 and slides therewith, and the first spring 93 is sleeved on the outer surface of the cylinder 94.

[0035] Furthermore, sealing strips 96 are fixedly connected to both sides of the contact surface between the inner groove 92 and the scraper 95 , and the scraper 95 and the sealing strip 96 are slidably sealed.

[0036] In this embodiment, when the lower gate plate 7 and the triangular top plate 8 are located inside the groove 12, the scrapers 95 on both sides of the groove 12 are in contact with the inclined surfaces on both sides of the triangular top plate 8 respectively. During the upward movement of the lower gate plate 7 and the triangular top plate 8, the scraper 95 and the connecting plate 91 are pushed to move toward the inside of the inner groove 92. During this process, the first spring 93 is compressed, and the scraper 95 is pressed against the inclined surface of the triangular top plate 8 by the reverse force of the first spring 93. Therefore, during the upward movement of the triangular top plate 8, the scraper 95 can scrape off the soil adhering to the inclined surface of the triangular top plate 8 so that the triangular top plate 8 can be completely embedded in the triangular groove 11.

[0037] It should be noted that: in this embodiment, the switch interface of the double-headed drive motor 41 and the hydraulic rod 10 are connected to the external power supply through wires, wherein the circuits and related driver programs involved are conventional technologies, which will not be described here. Here, the models of the double-headed drive motor 41 and the hydraulic rod 10 are not required.

[0038] In addition, in this embodiment, a cover can be provided on the frame 2 to protect the transmission parts such as the double-headed drive motor 41, the first bevel gear 51 and the second bevel gear 52, so as to ensure normal use in rainy and snowy weather and increase their service life.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-drive bevel gear hoist, comprising a river channel (1) and a gate assembly arranged at an outlet of the river channel (1), characterized in that: The gate assembly comprises an upper gate (3) and a lower gate (7); a frame (2) is fixedly mounted on the upper surface of the river channel (1); an opening and closing assembly (4) is arranged on the top of the frame (2); the opening and closing assembly (4) drives the upper gate (3) to move up and down at the outlet of the river channel (1) to control the opening and closing of the outlet of the river channel (1); the lower gate (7) is arranged at the bottom of the river channel (1), and the lower gate (7) is located below the upper gate (3); a triangular top plate (8) is fixedly connected to the top of the lower gate (7); and a triangular groove (11) adapted to the triangular top plate (8) is opened at the bottom of the upper gate (3).

2. A double-drive bevel gear hoist according to claim 1, characterized in that: A groove (12) is provided at the bottom of the inner surface of the river channel (1), the lower gate plate (7) is adapted to the groove (12), and a moving component (5) is provided inside the groove (12), the moving component (5) enables the lower gate plate (7) to move into or out of the groove (12), and scraping components (9) are provided on both sides of the opening of the groove (12), the scraping components (9) being used to clean the triangular top plate (8).

3. A double-drive bevel gear hoist according to claim 2, characterized in that: The opening and closing assembly (4) comprises a double-headed driving motor (41) arranged in the middle of the upper surface of the frame (2), the output shafts at both ends of the double-headed driving motor (41) are fixedly connected to the rotating shaft (42), the two sides of the upper surface of the frame (2) are fixedly connected to the supporting sleeves (45), the two groups of the rotating shafts (42) are rotatably mounted inside the corresponding supporting sleeves (45), the two ends of the rotating shafts (42) are fixedly connected to the annular plates (43), and a traction rope (44) is arranged between the two groups of the annular plates (43), one end of the traction rope (44) is wound around the rotating shaft (42), and the other end of the traction rope (44) is fixedly connected to the upper gate plate (3).

4. A dual-drive bevel gear hoist according to claim 3, characterized in that: Both sides of the bottom of the double-headed driving motor (41) are fixedly connected to mounting plates (46), and the mounting plates (46) are connected to the frame (2) via fixing bolts (47).

5. The double-drive bevel gear hoist according to claim 4, characterized in that: The moving assembly (5) comprises ball seats (56) fixedly mounted on both sides of the bottom of the lower gate plate (7), and slide grooves (54) matching the ball seats (56) are provided on both sides of the groove (12). A screw rod (55) is sleeved inside the ball seat (56), and the screw rod (55) is rotatably mounted inside the slide groove (54). The upper end of the screw rod (55) is fixedly connected to a connecting rod (53), and the upper end of the connecting rod (53) passes through the top of the frame (2) and is fixedly connected to a first bevel gear (51). One end of the rotating shaft (42) close to the first bevel gear (51) is fixedly connected to a second bevel gear (52), and the first bevel gear (51) is meshed with the second bevel gear (52).

6. A double-drive bevel gear hoist according to claim 5, characterized in that: The scraping assembly (9) comprises scrapers (95) arranged on both sides of the opening of the groove (12); one end of the scraper (95) is inserted into the inside of the side wall of the groove (12) and fixedly connected to a connecting plate (91); both sides of the side wall of the groove (12) are provided with inner grooves (92) adapted to the connecting plate (91); a first spring (93) is fixedly connected between the connecting plate (91) and the inner groove (92); a cylinder (94) is fixedly connected inside the inner groove (92); the cylinder (94) passes through the connecting plate (91) and slidably cooperates with the connecting plate (91); and the first spring (93) is sleeved on the outer surface of the cylinder (94).

7. A dual-drive bevel gear hoist according to claim 6, characterized in that: Sealing strips (96) are fixedly connected to both sides of the contact surface between the inner groove (92) and the scraper (95), and the scraper (95) and the sealing strip (96) are slidably sealed.

8. The double-drive bevel gear hoist according to claim 1, characterized in that: A hydraulic rod (10) is fixedly mounted on the top of the outlet of the inner surface of the river channel (1), and a limiting groove (14) adapted to the telescopic end of the hydraulic rod (10) is provided on one side of the outer surface of the upper gate plate (3), and the telescopic end of the hydraulic rod (10) can be moved into or out of the limiting groove (14).

9. A double-drive bevel gear hoist according to claim 8, characterized in that: A cylindrical groove (16) is provided inside the upper gate plate (3), a guide rod (13) is slidably connected inside the cylindrical groove (16), the upper end of the guide rod (13) is fixedly connected to the frame (2), a second spring (17) is sleeved on the outer surface of the guide rod (13), the upper end of the second spring (17) is fixedly connected to the frame (2), and the lower end of the second spring (17) is fixedly connected to the upper gate plate (3).

10. A double-drive bevel gear hoist according to claim 9, characterized in that: Both sides of the top of the upper gate plate (3) are fixedly connected with moving blocks (15), and both sides of the frame (2) are provided with moving grooves (6) adapted to the moving blocks (15), and the moving blocks (15) are slidably installed inside the corresponding moving grooves (6).