Lifting device for maintenance of rail transit gearbox

Abstract

The utility model belongs to the technical field of rail transit, and discloses a lifting device for maintenance of a rail transit gear box, which comprises a lifting mechanism, a lifting mechanism, a lifting mechanism and a lifting mechanism, and the lifting mechanism comprises a working platform and a hydraulic cylinder for driving the working platform to lift; the anti-toppling mechanism comprises four sets of extending screw cylinders capable of synchronously moving and extending outwards in the driving box, side edge plates are installed on one sides of the extending screw cylinders, and long screw rods are connected to the side edge plates in a threaded mode. Compared with the prior art, the anti-toppling mechanism has the advantages that the anti-toppling mechanism is additionally arranged, and four sets of auxiliary gears are driven to rotate synchronously through operation of the main gear. When the auxiliary gear rotates, the inner screw rod is driven to rotate in the extending screw cylinders, so that the extending screw cylinders on the periphery extend towards the periphery of the working platform. And after extending in place, the long screw drives the side support plate to descend to be in contact with the ground, so that the periphery below the working platform can be effectively supported, the shaking of the working platform is obviously reduced during maintenance operation, the toppling risk is greatly reduced, and the operation safety is obviously improved.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit technology, and specifically relates to a lifting device for the maintenance of rail transit gearboxes. Background Technology

[0002] The gearbox is a crucial component of rail transit vehicles. Due to prolonged operation, gearboxes are prone to wear and damage, requiring regular maintenance at repair shops. Lifting equipment is often used to assist in gearbox repairs.

[0003] Chinese Patent Publication No. CN218579595U, published on 2023-03-07, discloses a lifting device for the maintenance of gearboxes in rail transit. Section 0033 of the specification describes that the worker places the work to be repaired on two auxiliary platforms and stands on the plane formed by the combination of the two auxiliary platforms. By activating four hydraulic cylinders, the four hydraulic cylinders drive the main platform and the two auxiliary platforms to rise. When the worker is raised to a suitable height, the four hydraulic cylinders stop working, and the worker can then perform the maintenance work while standing on the two auxiliary platforms.

[0004] However, in practical applications, it has been found that the device lacks an anti-tipping structure, causing the platforms to sway and posing a safety hazard of tipping over when workers are operating on the main and auxiliary platforms. Therefore, this application proposes a new lifting device for the maintenance of rail transit gearboxes, aiming to solve the aforementioned problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a lifting device for the maintenance of rail transit gearboxes. By adding an anti-tipping mechanism, the main gear rotates, driving the surrounding auxiliary gears to rotate synchronously. When the auxiliary gears rotate, they drive the inner screw to rotate within the extension cylinders. Utilizing the principle of threaded transmission, the extension cylinders extend outwards to the four sides of the work platform. Once extended into position, the long screw drives the side support plates to descend and contact the ground, effectively supporting the four sides of the work platform. During maintenance operations, the swaying of the work platform is significantly reduced, greatly lowering the risk of tipping and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A lifting device for repairing rail transit gearboxes includes: a lifting mechanism, comprising a work platform and a hydraulic cylinder for driving the lifting and lowering movement of the work platform; an anti-tipping mechanism, comprising four sets of extension screws that can synchronously extend outward within the drive box, a side plate installed on one side of each extension screw, a long screw threadedly connected to the side plate, and a side support plate installed at the lower end of the long screw; and a support mechanism, comprising a support base plate for lowering and supporting the work platform, wherein a set of wheel openings are respectively opened around the support base plate, and universal wheels for driving the work platform to move are provided in the wheel openings.

[0008] In a preferred embodiment, a fixed plate is provided below the working platform, and a platform entrance is provided on one side of the working platform. A set of hydraulic cylinders is installed around the fixed plate, and the extension and retraction ends of the four sets of hydraulic cylinders are connected to the working platform. The drive box is located below the fixed plate, and the lower end of the hydraulic cylinder is fixedly connected to the drive box.

[0009] In a preferred embodiment, the drive box has a gear cavity, and a main gear is provided in the gear cavity. Four sets of auxiliary gears are meshed below the main gear, and both the main gear and the auxiliary gears are bevel gears.

[0010] In a preferred embodiment, a drive motor is mounted on top of the drive box, and the output shaft of the drive motor is fixedly connected to the main gear.

[0011] In a preferred embodiment, each of the four sets of auxiliary gears is connected to a set of internal screws on one side, the drive box has four sets of cylindrical grooves, the extension screw is located in the cylindrical grooves, and the internal screws are threadedly connected to the extension screws.

[0012] In a preferred embodiment, guide grooves are provided on both sides of the inner wall of the cylindrical groove, and side guide bars are provided in the guide grooves. The side guide bars are fixedly connected to the extension screw cylinder.

[0013] In a preferred embodiment, the support base plate is located below the drive box, and a lifting cylinder is installed at the center of the support base plate. The lifting cylinder is internally threaded to a lifting screw, and the upper end of the lifting screw is fixedly connected to the main gear.

[0014] In a preferred embodiment, the upper end of the caster wheel is fixedly connected to the drive box via a connecting rod, and a set of guide rods are installed around the bottom of the drive box, with the lower end of the guide rods penetrating the support base plate.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are:

[0016] 1. By adding an anti-tipping mechanism, before maintenance work begins, the main gear rotates, driving the surrounding auxiliary gears to rotate synchronously. As the auxiliary gears rotate, they drive the inner screw to rotate within the extension cylinders. Utilizing the principle of threaded transmission, the extension cylinders extend outwards from the work platform. Once in place, the long screw drives the side support plates to descend and contact the ground, effectively supporting the work platform from all sides. When workers perform maintenance work on the raised platform, platform sway is significantly reduced, greatly lowering the risk of tipping and significantly improving operational safety.

[0017] 2. Through the design of the support mechanism, when the main gear rotates, it also drives the lifting screw, causing the lifting cylinder to descend smoothly. This, in turn, pushes the support base plate downwards until it makes close contact with the ground. At this point, the support base plate provides stable support for the work platform, and the casters smoothly enter the wheel wells, preventing the work platform from moving accidentally due to contact between the casters and the ground. When it is necessary to move the work platform, the support base plate is raised, and the casters then make contact with the ground, allowing the work platform to return to its movable state for convenient and flexible position adjustment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a lifting device for the maintenance of a rail transit gearbox according to the present invention.

[0020] Figure 2 This is a structural schematic diagram from another perspective of the lifting device for the maintenance of a rail transit gearbox according to this utility model.

[0021] Figure 3 This is a structural schematic diagram of a lifting device for the maintenance of a rail transit gearbox, presented in this utility model, from an elevation perspective.

[0022] Figure 4 This is a top-view cross-sectional view of the lifting device for repairing a rail transit gearbox according to the present invention.

[0023] Figure 5 This is a schematic diagram of the connection structure of the main gear, auxiliary gear, internal screw, and extension screw in a lifting device for repairing a rail transit gearbox according to the present invention.

[0024] Figure 6 for Figure 2 Enlarged schematic diagram of part A.

[0025] In the diagram, 1. Lifting mechanism; 11. Working platform; 12. Hydraulic cylinder; 13. Platform entrance; 14. Fixed plate; 2. Anti-tipping mechanism; 21. Drive box; 22. Side plate; 23. Long screw; 24. Side support plate; 25. Gear cavity; 26. Main gear; 27. Secondary gear; 28. Extension screw; 29. ​​Side guide bar; 210. Slot; 211. Guide slot; 212. Inner screw; 213. Drive motor; 3. Support mechanism; 31. Support base plate; 32. Lifting screw; 33. Lifting screw; 34. Connecting rod; 35. Caster wheel; 36. Wheel opening; 37. Guide rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1 to 6 As shown: A lifting device for maintenance of rail transit gearboxes includes: a lifting mechanism 1, including a working platform 11 and a hydraulic cylinder 12 for driving the working platform 11 to move up and down; an anti-tipping mechanism 2, including four sets of extension screws 28 that can move outward synchronously within a drive box 21, a side plate 22 installed on one side of the extension screw 28, a long screw 23 threadedly connected to the side plate 22, and a side support plate 24 installed at the lower end of the long screw 23; and a support mechanism 3, including a support base plate 31 for lowering and supporting the working platform 11, a set of wheel openings 36 respectively opened around the support base plate 31, and universal wheels 35 for driving the working platform 11 to move inside the wheel openings 36. When the universal wheels 35 are in contact with the ground, the working platform 11 can be in a movable state.

[0028] like Figures 1 to 2 As shown: A fixed plate 14 is provided below the working platform 11, and a platform entrance 13 is opened on one side of the working platform 11. A set of hydraulic cylinders 12 are installed around the fixed plate 14. The telescopic ends of the four sets of hydraulic cylinders 12 are connected to the working platform 11. The drive box 21 is located below the fixed plate 14, and the lower end of the hydraulic cylinder 12 is fixedly connected to the drive box 21.

[0029] like Figure 4 As shown: The drive box 21 has a gear cavity 25, and the gear cavity 25 has a main gear 26. Four sets of auxiliary gears 27 are meshed below the main gear 26. Both the main gear 26 and the auxiliary gears 27 are bevel gears. When the main gear 26 rotates, it can drive the four sets of auxiliary gears 27 to rotate simultaneously through the meshing transmission of the main gear 26.

[0030] like Figure 2 As shown: A drive motor 213 is mounted on top of the drive box 21, and the output shaft of the drive motor 213 is fixedly connected to the main gear 26.

[0031] like Figure 5 As shown: Each of the four sets of auxiliary gears 27 is connected to an internal screw 212 on one side. The drive box 21 has four sets of cylindrical grooves 210. The extension screw 28 is located in the cylindrical grooves 210. The internal screw 212 is threadedly connected to the extension screw 28.

[0032] like Figure 6 As shown: Guide grooves 211 are provided on both sides of the inner wall of the cylindrical groove 210. Side guide strips 29 are provided in the guide grooves 211. The side guide strips 29 are fixedly connected to the extension screw 28. During the outward movement of the extension screw 28, the side guide strips 29 fixed on it slide along the path of the guide grooves 211 to ensure that the extension action is smooth and stable.

[0033] like Figures 3 to 5 As shown: The support base plate 31 is located below the drive box 21. A lifting screw cylinder 32 is installed at the center of the support base plate 31, and a lifting screw rod 33 is internally threaded into the lifting screw cylinder 32. The upper end of the lifting screw rod 33 is fixedly connected to the main gear 26. When the main gear 26 rotates, the lifting screw rod 33 gradually descends within the lifting screw cylinder 32. The lifting screw cylinder 32 drives the support base plate 31 to descend synchronously.

[0034] like Figure 2 As shown: The upper end of the caster wheel 35 is fixedly connected to the drive box 21 via the connecting rod 34. A set of guide rods 37 are installed around the bottom of the drive box 21. The lower end of the guide rod 37 passes through the support base plate 31 and can slide along the outside of the guide rod 37 when the support base plate 31 descends, ensuring that the descent process is stable and does not deviate.

[0035] In practical use, the working principle of this utility model is as follows:

[0036] In actual operation, the drive motor 213 is started, and its output shaft drives the main gear 26 to rotate. The main gear 26 engages in transmission, simultaneously driving the four sets of auxiliary gears 27 to rotate. The auxiliary gears 27 then drive the inner screw 212 to rotate within the extension cylinder 28, using the principle of threaded transmission to push the extension cylinder 28 to extend smoothly outward along the track of the cylinder groove 210. During the outward movement of the extension cylinder 28, the side guide strips 29 fixed to it slide along the path of the guide groove 211, ensuring smooth and stable extension action, and simultaneously driving the four sets of side plates 22 to unfold orderly around the bottom of the work platform 11. At the same time, the rotation of the main gear 26 also links the lifting screw 33 to gradually descend within the lifting cylinder 32. The lifting cylinder 32 drives the support base plate 31 to descend synchronously until the support base plate 31 contacts the ground, providing stable support for the drive box 21 and the support platform. When the support base plate 31 descends, it causes the wheel well 36 to descend outside the caster 35. Then, as the support base plate 31 supports the work platform 11, the caster 35 simultaneously detaches from the ground. The support base plate 31 also slides along the outside of the guide rod 37, ensuring stability and preventing deviation during descent. This prevents the caster 35 from contacting the ground, effectively avoiding the risk of accidental displacement of the work platform 11 due to the rolling of the caster 35. Subsequently, the long screw 23 is rotated, causing the side support plate 24 to descend until it is in close contact with the ground, providing support around the work platform 11. Once ready, workers enter the work platform 11 through the platform entrance 13 and operate the hydraulic cylinder 12 to smoothly raise the work platform 11, allowing for maintenance work on the rail vehicle gearbox. Due to the support of the side support plates 24, the swaying of the work platform 11 in the raised state is significantly reduced, the risk of tipping is significantly lowered, and operational safety is improved.

[0037] When the position of the work platform 11 needs to be adjusted, the operator first evacuates from the work platform 11, reverses the long screw 23, and raises the side support plate 24. Then, the drive motor 213 is restarted, causing the main gear 26 to rotate in the opposite direction. The reverse transmission of the main gear 26 drives the lifting screw 33 to rise within the lifting cylinder 32, raising the support base plate 31 accordingly. The casters 35 then re-engage with the ground, and the work platform 11 returns to its movable state, allowing for convenient and flexible adjustment to the desired position. During the raising of the support base plate 31, the four sets of extension cylinders 28 retract synchronously, causing the side plate 22 to retract quickly, effectively reducing the space occupied and facilitating transportation.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting device for rail transit gear box maintenance, characterized in that, Include: Lifting mechanism (1), including work platform (11) and drive work platform (11) lifting movement of hydraulic cylinder (12); Anti toppling mechanism (2), including four groups of extension cylinder (28) which can move outwardly synchronously in the drive box (21), one side of the extension cylinder (28) is installed with side plate (22), the side plate (22) is threadedly connected with long screw (23), the lower end of the long screw (23) is installed with side support plate (24); Support mechanism (3), including support bottom plate (31) for supporting work platform (11) to descend, a set of wheel opening (36) is respectively arranged around the support bottom plate (31), universal wheel (35) for driving work platform (11) to move is arranged in the wheel opening (36).

2. A rail transit gearbox maintenance lifting device as claimed in claim 1, characterized in that: The lower side of the work platform (11) is provided with a fixed plate (14), and a platform entrance (13) is formed on one side of the work platform (11), a set of hydraulic cylinders (12) is respectively arranged around the fixed plate (14), the telescopic ends of the four sets of hydraulic cylinders (12) are connected with the work platform (11), the drive box (21) is arranged below the fixed plate (14), and the lower end of the hydraulic cylinder (12) is fixedly connected with the drive box (21).

3. A rail transit gearbox maintenance lifting device as claimed in claim 2, characterized in that: The drive box (21) is provided with a gear cavity (25), and a main gear (26) is arranged in the gear cavity (25), four sets of auxiliary gears (27) are engaged and connected below the main gear (26), and the main gear (26) and the auxiliary gear (27) are bevel gears.

4. A rail transit gearbox maintenance lifting device as claimed in claim 3, characterized in that: The drive motor (213) is arranged above the drive box (21), and the output shaft of the drive motor (213) is fixedly connected with the main gear (26).

5. A rail transit gearbox maintenance hoist as claimed in claim 4, characterised in that: One side of the four sets of auxiliary gears (27) is connected with a set of inner screw (212), four sets of cylinder grooves (210) are formed in the drive box (21), the extension cylinder (28) is located in the cylinder groove (210), and the inner screw (212) is threadedly connected with the extension cylinder (28).

6. A rail transit gearbox maintenance hoist as claimed in claim 5 wherein: Guide grooves (211) are formed on both sides of the inner wall of the cylinder groove (210), side guide strips (29) are arranged in the guide grooves (211), and the side guide strips (29) are fixedly connected with the extension cylinder (28).

7. A rail transit gearbox maintenance lifting device as claimed in claim 4, characterized in that: The support bottom plate (31) is arranged below the drive box (21), the lifting cylinder (32) is arranged at the center of the support bottom plate (31), the lifting screw rod (33) is threadedly connected in the lifting cylinder (32), and the upper end of the lifting screw rod (33) is fixedly connected with the main gear (26).

8. A rail transit gearbox maintenance lifting device as claimed in claim 7, characterized in that: The upper end of the universal wheel (35) is fixedly connected with the drive box (21) through the connecting rod (34), a set of guide rods (37) is respectively arranged around the lower side of the drive box (21), and the lower end of the guide rod (37) penetrates the support bottom plate (31).

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