Portable lifting mechanism for supporting foot plate and crane

Abstract

The utility model discloses a portable lifting mechanism for a supporting foot disc, and belongs to the technical field of engineering machinery. Comprising a fixing device used for fixing a supporting foot plate, a driving device is arranged on the side portion of the fixing device, and a guiding device is arranged at the top of the fixing device; the driving device is connected with a steel wire rope, and the steel wire rope penetrates through the guiding device and is used for lifting the supporting foot disc. In the vehicle running state, the supporting foot plate is lifted and fixed through the worm and gear speed reducer and the fixing device, and the supporting foot plate is carried along with the vehicle; extra transport vehicles and manual carrying are not needed, so that the transport cost and the labor cost are saved.

Description

Technical Field

[0001] The utility model relates to a portable lifting mechanism of a supporting foot plate and a crane, belonging to the technical field of engineering machinery. Background Art

[0002] In the field of construction machinery, wheeled cranes are one of the equipment for lifting heavy objects. Compared with tower cranes and crawler cranes, their advantages are: fast and convenient transfer capabilities. When the vehicle arrives at the work site, the outriggers are driven by hydraulic cylinders to swing out, and the outriggers are supported under the vertical cylinders of the outriggers to increase the ground pressure. After the operation is completed, the outriggers are retracted to both sides of the frame under the drive of the swing cylinder. At present, there is no auxiliary retraction mechanism for super-large tonnage outriggers. Due to the large size and weight of the outriggers, it is impossible to achieve single-person operation and transportation on the vehicle. An auxiliary crane is required to lift it to the transport vehicle. This process increases transportation costs and affects work efficiency.

[0003] At present, when the X-leg is in the swing-back state, due to the compact layout of the vehicle, the vertical cylinder is arranged between the two tires. Due to the small distance between the tires, the space cannot be used to hang the support plate on the vertical cylinder and carry it with the vehicle. Therefore, when the vehicle is in motion, it is necessary to use an auxiliary crane to carry it or multiple people to cooperate to achieve manual transportation, and finally place the support plate on an auxiliary transport vehicle for transportation. The rotary lifting mechanism of the prior art can realize the carrying of the support plate with the vehicle, but the support plate needs to be manually hung on the rotary lifting mechanism, and the arrangement height of the rotation point has a great influence on the difficulty of manual hanging, which is not suitable for the manual hanging process of super-large tonnage metal support plates.

[0004] The existing technology of rotating lifting mechanism carrying the support plate on the vehicle saves the cost of auxiliary transportation vehicles, but requires manual hanging of the support plate on the rotating support. The movable outrigger box of super-large tonnage cranes is generally high, and the corresponding rotation hinge point is also very high. The support plate of super-large tonnage cranes is generally made of metal and its deadweight is generally greater than 80Kg. There is a certain degree of difficulty in the process of manual handling and hanging of the support plate, and there is still room for improvement in hanging efficiency. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a portable lifting mechanism and a crane for a support leg plate, so as to realize the disassembly and assembly of the support leg plate by one person, save labor costs, and realize the carrying of the support leg plate on a vehicle to save transportation costs.

[0006] In a first aspect, a portable lifting mechanism for a foot plate includes a fixing device for fixing the foot plate, a driving device is provided on the side of the fixing device, and a guiding device is provided on the top of the fixing device; the driving device is connected to a steel wire rope, and the steel wire rope passes through the guiding device for lifting the foot plate.

[0007] Optionally, a detachable locking pin is provided at the bottom of the fixing device, and both ends of the locking pin are fixed by R-type clips.

[0008] Optionally, a D-shaped shackle is provided at one end of the steel wire rope connected to the support plate.

[0009] Optionally, a guide wheel for guiding the wire rope is provided below the fixing device corresponding to the guide device.

[0010] Optionally, the guide device uses a roller bracket to fix the guide wheel.

[0011] Optionally, the driving device adopts a worm gear reducer, and the worm gear reducer is equipped with a manually rotating handle.

[0012] Optionally, the roller bracket is provided with a protective cover.

[0013] Optionally, the fixing device is provided with a guide plate for guiding the foot plate.

[0014] In a second aspect, a crane comprises the portable lifting mechanism of the support leg plate described in the first aspect, wherein the portable lifting mechanism of the support leg plate is arranged at one end of the movable support leg of the crane away from the frame.

[0015] Optionally, the movable supporting leg is provided with a vertical oil cylinder, and the top of the supporting leg plate is provided with a guide slide groove adapted to the vertical oil cylinder.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The present invention drives the worm gear reducer to operate by turning the handle, and pulls the wire rope to realize the vertical lifting of the support plate. The wire rope is connected to the support plate through a D-shaped shackle, which reduces the difficulty of manually hanging the support plate on the lifting mechanism; with the help of the self-locking feature of the worm gear reducer, the risk of the support plate falling suddenly is eliminated, and the difficulty of manually moving the support plate to lift is reduced; the installation position of the lifting mechanism in the present invention has little effect on the difficulty of manual operation, and is more suitable for the whole vehicle layout with a high installation position of the support plate, such as super-large tonnage cranes;

[0018] When the vehicle of the present invention is in driving state, the support plate is carried by the worm gear reducer and the fixing device, so that the support plate can be carried with the vehicle; no additional transport vehicle is required, thus saving transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view schematic diagram of the portable lifting mechanism of the utility model (with the support plate folded up);

[0020] Figure 2 A top view of the portable lifting mechanism of the utility model (with the support plate folded up) Figure 1 ;

[0021] Figure 3 A top view of the portable lifting mechanism of the utility model (with the support plate folded up) Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the portable lifting mechanism of the utility model (the support plate is separated);

[0023] Figure 5 This is a second schematic diagram of the portable lifting mechanism of the utility model (the support plate is separated);

[0024] Figure 6 For this utility model Figure 5 The enlarged schematic diagram of point I in the middle;

[0025] In the figure: 1. Fixing device; 2. R-type card; 3. Locking pin; 4. Support plate; 5. D-type shackle; 6. Protective cover; 7. Roller bracket; 8. Worm gear reducer; 9. Handle; 10. Movable support leg; 11. Vertical cylinder; 12. Wire rope; 1-1. Guide plate 1; 1-2. Guide plate 2. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example

[0029] like Figure 1-Figure 6 As shown, a portable lifting mechanism for a foot plate is disclosed, including a fixing device 1 for fixing the foot plate 4, a driving device is provided on the side of the fixing device, and a guiding device is provided on the top of the fixing device; the driving device is connected to a steel wire rope 12, and the steel wire rope passes through the guiding device for lifting the foot plate 4.

[0030] refer to Figure 4 In this embodiment, a removable locking pin 3 is provided at the bottom of the fixing device, and the two ends of the locking pin 3 are fixed by R-shaped clips 2. When the support plate 4 needs to be lowered, the right R-shaped clip 2 is first pulled out, and the locking pin 3 is pulled out, so that the support plate 4 will not be blocked from falling. The purpose of installing the locking pin 3 is to provide mechanical limit, which can ensure the stability of the support plate 4 when the crane is moving.

[0031] refer to Figure 4 and Figure 5 As shown, one end of the steel wire rope 12 connected to the support plate 4 is provided with a D-type shackle 5, and the D-type shackle 5 is used for quick connection and disassembly with the support plate 4. After being lowered into place, the steel wire rope 12 can be disassembled and stored.

[0032] In the embodiment, the lower part of the support leg plate is clamped in the fixing mechanism via a locking pin shaft, and the support leg plate can also be clamped in the fixing device by means of a locking baffle or bolt connection.

[0033] refer to Figure 1 and Figure 6 As shown, a guide wheel (not shown in the figure) for guiding the wire rope 12 is provided below the fixing device 1 corresponding to the guide device, and the fixing device is provided with two guide plates for guiding the support plate, namely guide plate 1-1 and guide plate 2 1-2. The guide ring is provided to ensure that the wire rope can move vertically up and down when the wire rope is retracted and released up and down, and further ensure that the support plate can move up or down smoothly in the fixing device, and prevent the support plate 4 from getting stuck due to the outward tilt of the center of gravity.

[0034] like Figure 3As shown, the driving device adopts a worm gear reducer 8, and the worm gear reducer is equipped with a manually rotated handle 9. The handle is a detachable structure or a directly connected non-detachable structure. In this embodiment, the worm gear reducer is manually driven, and can also be electrically or hydraulically driven. The purpose of manual drive is to save costs.

[0035] like Figure 4-5 As shown, the guide device uses a roller bracket 7, and the roller bracket 7 is provided with a protective cover 6. The roller bracket 7 is used to guide the wire rope to the D-type shackle fixed on the support plate. The roller bracket 7 is provided to reduce the wear of the wire rope and make the wire rope retracted and released more smoothly. The protective cover 6 protects the roller bracket and improves the overall aesthetics. Example

[0036] A crane, comprising the portable lifting mechanism of the support plate described in Example 1, wherein the portable lifting mechanism of the support plate is arranged at one end of the movable leg 10 of the crane away from the frame, the movable leg is provided with a vertical cylinder 11, and the top of the support plate 4 is provided with a guide slide groove (not shown in the figure) adapted to the vertical cylinder, such as Figure 4-Figure 6 As shown, the bottom of the vertical oil cylinder 11 is convex, which matches the concave surface exactly, thereby increasing the firmness of both.

[0037] The present invention drives the worm gear reducer to operate by turning the handle, and pulls the wire rope to realize the vertical lifting of the support plate. The wire rope is connected to the support plate through a D-shaped shackle, which reduces the difficulty of manually hanging the support plate on the lifting mechanism; with the self-locking feature of the worm gear reducer, the risk of sudden falling of the support plate is eliminated, and the difficulty of manual lifting is reduced; the installation position of the lifting mechanism in the present invention has little effect on the difficulty of manual operation, and is more suitable for carrying on a large-tonnage crane;

[0038] When the vehicle of the present invention is in driving state, the support plate is carried by the worm gear reducer and the fixing device, so that the support plate can be carried with the vehicle; no additional transport vehicle is required, thus saving transportation costs.

[0039] When using:

[0040] like Figure 6 As shown, in the hoisting preparation stage, when the support plate needs to be placed on the ground, the R-type clamp 2 must be removed first, the locking pin 3 must be pulled out, the handle 9 must be installed, and the worm gear reducer 8 must be driven by rotating the handle 9 to cause the wire rope 12 to slowly descend, thereby driving the support plate to slowly descend until it falls to the ground, and finally the D-type shackle 5 must be detached from the support plate.

[0041] After the hoisting is completed, when the support plate 4 needs to be retracted to the fixing device, first pull out the locking pin shaft 3, install the handle 9, turn the worm gear reducer 8, and let the wire rope 12 slowly fall until it is connected to the support plate 4. Turn the handle 9 in the opposite direction to make the wire rope 12 rise slowly, driving the support plate 4 to slowly rise. When the upper end of the support plate 4 begins to enter the fixing device 1, gently support the support plate 4 with one hand to ensure that the upper end of the support plate enters the fixing device along the guide tracks 1-1 and sequence 1-2, further turn the handle 9 until the support plate 4 is lifted to the highest position, and finally install the locking pin shaft 3 to ensure that the support plate 4 is clamped in the fixing device 1 through the locking pin shaft 3, install the R-type card 2 to prevent the locking pin shaft 3 from moving horizontally, and finally retract the handle 9. At this point, the support plate 4 is retracted.

[0042] Finally, the movable legs are reset so that the leg tray can be carried with the vehicle.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A portable lifting mechanism for a foot tray, characterized in that: It comprises a fixing device for fixing the supporting foot plate, a driving device is arranged on the side of the fixing device, and a guiding device is arranged on the top of the fixing device; the driving device is connected with a steel wire rope, and the steel wire rope passes through the guiding device for lifting the supporting foot plate.

2. The portable lifting mechanism for the support plate according to claim 1 is characterized in that: A detachable locking pin is provided at the bottom of the fixing device, and both ends of the locking pin are fixed by R-shaped clips.

3. The portable lifting mechanism for the support plate according to claim 1 is characterized in that: One end of the steel wire rope connected to the supporting foot plate is provided with a D-type shackle.

4. The portable lifting mechanism for a foot tray according to claim 1 is characterized in that: A guide wheel for guiding the steel wire rope is provided below the fixing device corresponding to the guide device.

5. The portable lifting mechanism for the foot tray according to claim 4 is characterized in that: The guide device adopts a roller bracket to fix the guide wheel.

6. The portable lifting mechanism for a foot tray according to claim 1, characterized in that: The driving device adopts a worm gear reducer, and the worm gear reducer is equipped with a manually rotating handle.

7. The portable lifting mechanism for a foot tray according to claim 5, characterized in that: The roller bracket is provided with a protective cover.

8. The portable lifting mechanism for a foot tray according to claim 1 is characterized in that: The fixing device is provided with a guide plate for guiding the foot plate.

9. A crane, characterized in that: It comprises the portable lifting mechanism of the support plate as described in any one of claims 1 to 8, and the portable lifting mechanism of the support plate is arranged at one end of the movable support leg of the crane away from the frame.

10. The crane according to claim 9, characterized in that The movable supporting leg is provided with a vertical oil cylinder, and the top of the supporting leg plate is provided with a guide sliding groove adapted to the vertical oil cylinder.

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