Self-lubricating bridge crane

Abstract

The utility model provides a self-lubricating bridge crane which is characterized in that a connecting seat is arranged at the upper end of a lifting hook, a first movable pulley is arranged on the front side of the connecting seat, and a second movable pulley is arranged on the rear side of the connecting seat; a third fixed pulley is arranged on the lower side of the upper connecting frame; a first shell, a second shell and a third shell are correspondingly arranged on the outer sides of the first movable pulley, the second movable pulley and the third fixed pulley; a first liquid storage tank is arranged between the first shell and the second shell, the first liquid storage tank communicates with two liquid conveying pipelines, the two liquid conveying pipelines extend into the first shell and the second shell correspondingly, and liquid outlets are located over the first movable pulley and the second movable pulley; a second liquid storage tank is arranged at the top of the third shell; the second liquid storage tank is connected with a liquid conveying pipeline, the liquid conveying pipeline extends into the third shell, and a liquid outlet is located over the third fixed pulley. The self-lubricating bridge crane can respectively add lubricating oil to the fixed pulley of the crane and the movable pulley of the lifting appliance for lubrication.

Description

Technical Field

[0001] This utility model relates to a lifting device, specifically, to a self-lubricating bridge crane. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also called an overhead crane, gantry crane, or hoist. A bridge crane is a lifting device that spans across workshops, warehouses, and material yards for material handling. Because its two ends rest on tall concrete pillars or metal supports, it resembles a bridge. The bridge frame of a bridge crane runs longitudinally along tracks laid on elevated supports on both sides, making full use of the space beneath the bridge frame for material handling without being obstructed by ground equipment. It is the most widely used and numerous type of lifting machinery. Lubricating oil is a liquid or semi-solid lubricant used in various mechanical equipment to reduce friction and protect machinery and processed parts. Its main functions include lubrication, cooling, rust prevention, cleaning, sealing, and cushioning. During the use of a crane, it is also necessary to periodically add lubricating oil to certain parts of the crane to ensure smooth operation.

[0003] To facilitate the addition of lubricants, many cranes are now equipped with lubrication devices. For example, Chinese patent CN222063907U discloses a self-lubricating gantry crane. However, the self-lubricating function of this crane only lubricates the pulleys of the lifting trolley on the upper side of the gantry frame and cannot lubricate other parts such as the lifting gear.

[0004] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a self-lubricating bridge crane.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A self-lubricating bridge crane includes a ground rail, a gantry mounted on the ground rail, and an electric hoist mounted on the gantry. The gantry includes a crossbeam and legs mounted on the lower sides of both ends of the crossbeam. A trolley traveling mechanism is mounted on the lower end of each leg and cooperates with the ground rail. A trolley traveling mechanism is mounted on the upper side of the electric hoist, and a trolley traveling track is correspondingly mounted on the crossbeam. The trolley traveling mechanism cooperates with the trolley traveling track. The electric hoist includes an upper connecting frame, and a lifting drum is mounted on the lower side of the upper connecting frame. The lifting drum and a lifting device are connected by a wire rope. The lifting device includes a hook, and a connecting seat is mounted on the upper end of the hook. A first movable pulley is mounted on the front side of the connecting seat, and a second movable pulley is mounted on the rear side of the connecting seat. A third fixed pulley is provided on the lower side of the upper connecting frame; the wire rope led out from the hoisting drum passes sequentially around the second movable pulley, the third fixed pulley, and the first movable pulley; a first housing, a second housing, and a third housing are respectively provided on the outer sides of the first movable pulley, the second movable pulley, and the third fixed pulley; a first liquid storage tank is provided between the first housing and the second housing, and the first liquid storage tank is connected to two liquid delivery pipes, which extend into the first housing and the second housing respectively, with their outlets located directly above the first movable pulley and the second movable pulley; a second liquid storage tank is provided on the top of the third housing; the second liquid storage tank is connected to a liquid delivery pipe, which extends into the third housing and has its outlet located directly above the third fixed pulley.

[0008] The upper connecting frame is a rectangular frame, and four sets of L-shaped connecting plates are arranged on the upper side of the rectangular frame, which are symmetrical in pairs; the two sets of symmetrical L-shaped connecting plates are connected by connecting columns, and mounting plates are arranged at both ends of the connecting columns; each mounting plate is equipped with a rotating wheel as a trolley traveling mechanism; at least one mounting plate is equipped with a drive motor, and the output end of the drive motor is connected to the rotating wheel for transmission.

[0009] At least one of the mounting plates has a support plate connected to its side, and the lower side of the support plate is connected to the mounting plate by several reinforcing plates; the drive motor is fixed to the upper side of the support plate.

[0010] The first and second housings are circular housings. The circular housings are coaxially arranged with the first and second movable pulleys. The first and second movable pulleys are rotatably connected to the circular housings respectively. The upper sides of the circular housings are provided with notches to facilitate the entry and exit of the wire rope.

[0011] The third housing includes a top plate fixedly connected to a rectangular frame, and a front cover plate and a rear cover plate disposed on both sides of the top plate; a third fixed pulley is located between the front cover plate and the rear cover plate and is rotatably connected to the front cover plate and the rear cover plate.

[0012] The first movable pulley, the second movable pulley, and the third fixed pulley have arc-shaped grooves on their sides that are tangent to the wire rope, and the wire rope falls into the corresponding arc-shaped grooves.

[0013] Compared to existing technologies, the advantages of this invention are that it provides a self-lubricating bridge crane that allows for the separate addition of lubricating oil to the fixed pulleys and movable pulleys of the lifting device. Specifically, a first and a second liquid storage tank are used to store lubricating oil. After the equipment has been used for a period of time, the first and second liquid storage tanks inject lubricating oil into the tops of the first movable pulley, the second movable pulley, and the third fixed pulley. As the pulleys rotate, the lubricating oil is evenly applied to the pulleys. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the electric hoist in this utility model.

[0016] In the diagram: 1. Outrigger; 2. Crossbeam; 3. Trolley traveling mechanism; 4. Electric hoist; 5. Upper connecting frame; 6. Lifting drum; 7. First movable pulley; 8. Second movable pulley; 9. Third fixed pulley; 10. First liquid storage tank; 11. Second liquid storage tank; 12. L-shaped connecting plate; 13. Mounting plate; 14. Rotary wheel; 15. Top plate; 16. Circular shell. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. "Installed," "equipped with," and "connected" can employ conventional means in the prior art, such as integral installation, snap-fit ​​installation, welding connection, adhesive connection, bolted connection, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances and select suitable connection, setting, or installation methods from the existing technology.

[0019] like Figure 1-2As shown, a self-lubricating bridge crane includes a ground rail (not shown), a gantry mounted on the ground rail, and an electric hoist 4 mounted on the gantry. The gantry includes a crossbeam 2 and legs 1 located on the lower sides of both ends of the crossbeam 2. A trolley traveling mechanism 3 is provided at the lower end of the legs 1, and the trolley traveling mechanism 3 cooperates with the ground rail. Specifically, the trolley traveling mechanism 3 mainly includes a lower end beam, traveling wheels mounted on the lower end beam, and a drive motor that drives the traveling wheels to rotate. During use, the traveling wheels can move along the ground rail.

[0020] The electric hoist 4 has a trolley traveling mechanism on its upper side, and a trolley traveling track is correspondingly provided on the crossbeam 2. The trolley traveling mechanism cooperates with the trolley traveling track. The electric hoist 4 includes an upper connecting frame 5, and a lifting drum 6 is provided on the lower side of the upper connecting frame 5. The lifting drum 6 and the lifting device are connected by a wire rope. The lifting device includes a hook, and a connecting seat is provided at the upper end of the hook. A first movable pulley 7 is provided on the front side of the connecting seat, and a second movable pulley 8 is provided on the rear side of the connecting seat. A third fixed pulley 9 is provided on the lower side of the upper connecting frame 5. The wire rope led out from the lifting drum 6 passes sequentially around the second movable pulley 8, the third fixed pulley 9, and the first movable pulley 7 (the end of the wire rope is connected to the upper connecting frame 5). The side of the third housing is equipped with three sets of pulleys to ensure the stability of the lifting process. The first movable pulley 7, the second movable pulley 8, and the third fixed pulley 9 are respectively arranged on the outside of the first housing, the second housing, and the third housing. A first liquid storage tank 10 is arranged between the first housing and the second housing. The first liquid storage tank 10 is connected to two liquid delivery pipes. The two liquid delivery pipes extend into the first housing and the second housing respectively, and the liquid outlet is located directly above the first movable pulley 7 and the second movable pulley 8. A second liquid storage tank 11 is arranged on the top of the third housing. The second liquid storage tank 11 is connected to a liquid delivery pipe. The liquid delivery pipe extends into the third housing and the liquid outlet is located directly above the third fixed pulley 9.

[0021] The first and second liquid storage tanks 10 and 11 are used to store lubricating oil. After a period of use, the first and second liquid storage tanks 10 and 11 inject lubricating oil into the tops of the first movable pulley 7, the second movable pulley 8, and the third fixed pulley 9. As the pulleys rotate, the pulleys are evenly coated with lubricating oil. In addition, to facilitate the addition of lubricating oil to the first and second liquid storage tanks 10 and 11, the tops of the first and second liquid storage tanks 10 and 11 can be provided with filling ports and detachable top covers (e.g., threaded connections). To control the filling process, the first and second liquid storage tanks 10 and 11 can each be equipped with a miniature delivery pump. The miniature delivery pump connects the inside of the liquid storage tank to the delivery pipeline. The first and second liquid storage tanks 10 and 11 can each be equipped with a battery box, which can be located outside the liquid storage tank to power the miniature delivery pump. In addition, the miniature delivery pump can be controlled by a remote control. The connection circuit and control circuit of the remote control and the miniature delivery pump all adopt existing technology, which can turn on the miniature delivery pump and add lubricating oil as needed.

[0022] In one embodiment, the upper connecting frame 5 is a rectangular frame, with four sets of L-shaped connecting plates 12 arranged symmetrically in pairs on the upper side of the rectangular frame; the two sets of symmetrical L-shaped connecting plates 12 are connected by connecting columns, and mounting plates 13 are respectively provided at both ends of the connecting columns; each mounting plate 13 is provided with a rotating wheel 14 as a trolley traveling mechanism; at least one mounting plate 13 is provided with a drive motor, the output end of which is connected to the rotating wheel 14 for transmission, specifically, through a transmission gear. During use, the drive motor drives the rotating wheel 14 to move along the trolley traveling track.

[0023] In one embodiment, at least one of the mounting plates 13 has a support plate connected to its side, and the lower side of the support plate is connected to the mounting plate 13 by a plurality of reinforcing plates; the drive motor is fixed to the upper side of the support plate.

[0024] In one embodiment, the first housing and the second housing are circular housings 16, which are coaxially arranged with the first movable pulley 7 and the second movable pulley 8, and the first movable pulley 7 and the second movable pulley 8 are rotatably connected to the circular housing 16; the upper two sides of the circular housing 16 are respectively provided with notches to facilitate the entry and exit of the wire rope. Specifically, a circular housing refers to a housing with a circular cross-section.

[0025] In one embodiment, the third housing includes a top plate 15 fixedly connected to a rectangular frame and a front cover plate and a rear cover plate disposed on both sides of the top plate 15; a third fixed pulley 9 is located between the front cover plate and the rear cover plate and is rotatably connected to the front cover plate and the rear cover plate.

[0026] In one embodiment, the first movable pulley 7, the second movable pulley 8, and the third fixed pulley 9 are provided with arc-shaped grooves on their sides that are tangent to the wire rope. The wire rope falls into the arc-shaped grooves accordingly, which prevents the wire rope from coming out and also facilitates the addition of lubricating oil.

[0027] The above embodiments can be combined with each other.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A self-lubricating bridge crane, comprising a ground rail, a gantry mounted on the ground rail, and an electric hoist mounted on the gantry; the gantry includes a crossbeam and legs mounted on the lower sides of both ends of the crossbeam, the lower ends of the legs being provided with a trolley traveling mechanism, the trolley traveling mechanism cooperating with the ground rail; the upper side of the electric hoist is provided with a trolley traveling mechanism, the crossbeam being correspondingly provided with a trolley traveling track, the trolley traveling mechanism cooperating with the trolley traveling track; characterized in that: The electric hoist includes an upper connecting frame, with a lifting drum mounted on the lower side of the upper connecting frame. The lifting drum and the lifting device are connected by a wire rope. The lifting device includes a hook, with a connecting seat at the upper end of the hook. A first movable pulley is mounted on the front side of the connecting seat, and a second movable pulley is mounted on the rear side of the connecting seat. A third fixed pulley is mounted on the lower side of the upper connecting frame. The wire rope leading from the lifting drum passes sequentially around the second movable pulley, the third fixed pulley, and the first movable pulley. A first housing, a second housing, and a third housing are respectively mounted on the outer sides of the first movable pulley, the second movable pulley, and the third fixed pulley. A first liquid storage tank is located between the first housing and the second housing. The first liquid storage tank is connected to two liquid delivery pipes, which extend into the first housing and the second housing, respectively, with their outlets located directly above the first and second movable pulleys. A second liquid storage tank is located on the top of the third housing. The second liquid storage tank is connected to a liquid delivery pipe, which extends into the third housing, with its outlet located directly above the third fixed pulley.

2. The self-lubricating bridge crane according to claim 1, characterized in that: The upper connecting frame is a rectangular frame, and four sets of L-shaped connecting plates are arranged on the upper side of the rectangular frame, which are symmetrical in pairs; the two sets of symmetrical L-shaped connecting plates are connected by connecting columns, and mounting plates are arranged at both ends of the connecting columns; each mounting plate is equipped with a rotating wheel as a trolley traveling mechanism; at least one mounting plate is equipped with a drive motor, and the output end of the drive motor is connected to the rotating wheel for transmission.

3. The self-lubricating bridge crane according to claim 2, characterized in that: At least one of the mounting plates has a support plate connected to its side, and the lower side of the support plate is connected to the mounting plate by several reinforcing plates; the drive motor is fixed to the upper side of the support plate.

4. The self-lubricating bridge crane according to claim 3, characterized in that: The first and second housings are circular housings. The circular housings are coaxially arranged with the first and second movable pulleys. The first and second movable pulleys are rotatably connected to the circular housings respectively. The upper sides of the circular housings are provided with notches to facilitate the entry and exit of the wire rope.

5. The self-lubricating bridge crane according to claim 4, characterized in that: The third housing includes a top plate fixedly connected to a rectangular frame, and a front cover plate and a rear cover plate disposed on both sides of the top plate; a third fixed pulley is located between the front cover plate and the rear cover plate and is rotatably connected to the front cover plate and the rear cover plate.

6. The self-lubricating bridge crane according to claim 5, characterized in that: The first movable pulley, the second movable pulley, and the third fixed pulley have arc-shaped grooves on their sides that are tangent to the wire rope, and the wire rope falls into the corresponding arc-shaped grooves.

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