CN210366742U - Soft leg protection device of landing leg for self-walking crane - Google Patents
Soft leg protection device of landing leg for self-walking crane Download PDFInfo
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- CN210366742U CN210366742U CN201921182312.3U CN201921182312U CN210366742U CN 210366742 U CN210366742 U CN 210366742U CN 201921182312 U CN201921182312 U CN 201921182312U CN 210366742 U CN210366742 U CN 210366742U
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- supporting leg
- oil cylinder
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- connecting frame
- travel switch
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Abstract
The utility model belongs to the technical field of crane supporting legs, in particular to a soft leg protection device of supporting legs for a self-walking crane, one end of an inner movable supporting leg is movably connected with a connecting frame, the other end of the inner movable supporting leg is provided with a hinged disc, the hinged disc is movably connected with a heave oil cylinder, the other end of the heave oil cylinder is movably connected with the connecting frame, the hinged disc is also fixedly connected with an outer movable supporting leg, the outer movable telescopic supporting leg is sleeved in the outer movable supporting leg, the extending end of the outer movable telescopic supporting leg is connected with a universal supporting leg disc, and an air spring is connected between the inner movable supporting leg and the hinged disc; the end of the heave oil cylinder, which is hinged with the connecting frame, is provided with a travel switch collision plate, the connecting frame is provided with a travel switch, the travel switch controls the on-off of the electromagnetic valve, and the heave oil cylinder is in floating hinge with the connecting frame. This application fluctuation hydro-cylinder adopts unsteady connection structure, and mechanical type touches the break-make that realizes travel switch, and then control solenoid valve break-make, the safety of protection hoist, and mechanical type contact control break-make is higher than pressure detection reliability.
Description
Technical Field
The utility model belongs to the technical field of the hoist landing leg, concretely relates to soft leg protection device of landing leg for self-propelled hoist.
Background
The self-walking crane belongs to a miniature crawler crane, a synthetic rubber crawler hydraulic walking device is adopted during normal walking, supporting legs are unfolded during hoisting operation, and the hoisting operation is completed by means of the support of the large-span supporting legs. The machine is suitable for operation in narrow space where a large crane cannot be unfolded, can be widely applied to loading and unloading goods in transformer substations, building roofs, glass curtain walls, subway construction, indoor steel structures, freight yard wharfs, warehouses and the like, can greatly reduce labor intensity during loading and unloading goods, improves working efficiency and saves manpower.
The landing leg is an important mechanism of the self-walking crane and is mainly responsible for supporting the self weight and the cargo weight when the crane works, and the span formed after the landing leg is supported determines the large-amplitude lifting capacity of the crane. When in actual use, a client requires that the supporting legs are unfolded and supported on a solid ground, and the ground is collapsed or the oil cylinder is decompressed to cause the instability of one leg, so that the instability danger is easy to occur.
The existing self-walking crane is only provided with a simple torque limiting device; the soft legs of the supporting legs or the ground are soft and collapse, the crane only limits the moment and cannot detect the conditions of the supporting legs, so that the rollover phenomenon of the vehicle sometimes occurs; the soft leg protection device is installed to the external producer, and the landing leg pressure change of pure measurement reaches the restriction purpose, and in the in-service use process, because there is residual pressure or the delay of pressure measurement in the landing leg, influenced factor is more, and there is certain delay and error in this kind of structure, and the reliability is poor.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a soft leg protection device of landing leg for self-walking crane. When the supporting legs of the self-walking crane have a tendency to leave the ground or the ground collapses to cause insufficient supporting force in the hoisting operation process, the oil cylinder floats to touch the travel switch, and the on-off of the electromagnetic valve is controlled through the travel switch, so that dangerous actions in the torque increasing direction are limited, and the man-machine safety is protected.
The utility model discloses a realize through following technical scheme: a supporting leg soft leg protection device for a self-walking crane comprises an inner movable supporting leg, an outer movable supporting leg and an outer movable telescopic supporting leg, wherein one end of the inner movable supporting leg is movably connected with a connecting frame, the other end of the inner movable supporting leg is provided with a hinged disc, the hinged disc is movably connected with a heave oil cylinder, the other end of the heave oil cylinder is movably connected with the connecting frame, the hinged disc is also fixedly connected with the outer movable supporting leg, the outer movable telescopic supporting leg is sleeved in the outer movable supporting leg, the extending end of the outer movable telescopic supporting leg is connected with a universal supporting leg disc, and an air spring is connected between the inner movable supporting leg and the hinged disc; the end of the heave oil cylinder, which is hinged with the connecting frame, is provided with a travel switch collision plate, the connecting frame is provided with a travel switch, the travel switch controls the on-off of the electromagnetic valve, and the heave oil cylinder is in floating hinge with the connecting frame.
Furthermore, the travel switch collision plate comprises a bent steel plate and a cylinder welded at the free end of the steel plate.
Furthermore, a waist-shaped hole is formed in the heave oil cylinder, and the pin shaft penetrates through the waist-shaped hole of the heave oil cylinder and is in floating hinge connection with the connecting frame.
Furthermore, the waist-shaped hole is formed in the bottom of the heave oil cylinder.
The utility model has the advantages that: the fluctuation oil cylinder adopts a floating connection structure, the on-off of the travel switch is realized through mechanical touch, the on-off of the electromagnetic valve is further controlled, the safety of the crane is protected, and the reliability of mechanical contact control on-off is higher than that of pressure detection; the oil cylinder floating structure is simple to process, the travel switch is simple to arrange, and the occupied space is small; the structure is not influenced by the trend of the pressure pipeline, is easy to arrange and has reliable detection structure.
Drawings
FIG. 1 is a schematic view of the structure of the movable leg of the present invention;
FIG. 2 is a schematic view of the local structure of the soft leg protector of the present invention;
in the figure, the device comprises a platform connecting shaft 1, a connecting frame 2, a heave oil cylinder 3, an inner movable supporting leg 4, an outer movable supporting leg 5, an air spring 6, an outer movable supporting leg 7, an outer movable telescopic supporting leg 8, a universal supporting leg disc 9, a travel switch 10, a travel switch collision plate 11 and a heave oil cylinder hinge point floating hole.
Detailed Description
The invention will be further explained below with reference to the drawings and examples.
As shown in fig. 1 and 2, a leg soft leg protector for a self-walking crane comprises an inner movable leg 4, the crane comprises an outer movable supporting leg 6 and an outer movable telescopic supporting leg 7, wherein one end of the inner movable supporting leg 4 is movably connected with a connecting frame 2, the connecting frame 2 is fixed on a crane platform through a platform connecting shaft 1, the other end of the inner movable supporting leg 4 is provided with a hinged disc, the hinged disc is in a cam shape and is hinged with the inner movable supporting leg 4, one end of the hinged disc is movably connected with a heave oil cylinder 3, the other end of the heave oil cylinder 3 is movably connected with the connecting frame 2, the other end of the hinged disc is also fixedly connected with the outer movable supporting leg 6, the outer movable telescopic supporting leg 7 is sleeved in the outer movable supporting leg 6, the outer movable telescopic supporting leg 7 is fixed with the outer movable supporting leg 6 in the outer movable supporting leg 6, the extending end of the outer movable telescopic supporting leg 7 is connected with a universal supporting leg disc 8, and an air spring 5 is connected between the; the end, hinged with the connecting frame 2, of the heave oil cylinder 3 is provided with a travel switch collision plate 10, and further, the travel switch collision plate 10 comprises a bent steel plate and a cylinder welded at the free end of the steel plate. The connecting frame 2 is provided with a travel switch 9, the travel switch 9 controls the on-off of the electromagnetic valve, and the heave oil cylinder 3 is in floating hinge connection with the connecting frame 2 through a heave oil cylinder hinge point floating hole 11.
As an improvement of this embodiment, the heave oil cylinder 3 is provided with a kidney-shaped hole, the pin shaft penetrates through the kidney-shaped hole of the heave oil cylinder 3 to be in floating hinge connection with the connecting frame 2, the heave oil cylinder 3 with the kidney-shaped hole can rotate around the pin shaft, and the kidney-shaped hole can axially move in the pin shaft to achieve a floating effect. Furthermore, the waist-shaped hole is arranged at the bottom of the heave oil cylinder 3.
The self-walking crane is generally provided with four supporting legs, during operation, the universal supporting leg disc 8 is supported on the ground, and supporting reaction force is transmitted to the outward movable supporting leg 6 through the outward movable telescopic supporting leg 7 and is transmitted to the heave oil cylinder 3 to the connecting frame 2 along the axial direction of the oil cylinder through the hinge point of the inner movable supporting leg 4;
when the lifting oil cylinder works normally, the lifting oil cylinder 3 presses the pin shaft of the hinge point backwards along the axis direction of the oil cylinder to drive the travel switch collision plate 10 arranged on the lifting oil cylinder 3 to press the travel switch 9 to control the unloading valve to be disconnected, and the getting-on action can work normally without limitation.
When the soft leg of the supporting leg or the ground is soft and collapsed, the supporting leg is in an unstressed state, the heave oil cylinder 3 is pulled forwards along the axis direction of the oil cylinder, the rear end of the heave oil cylinder hinged with the floating hole 11 is in contact with a pin shaft of a hinged point, a stroke switch collision plate 10 arranged on the heave oil cylinder 3 is driven to be separated from a stroke switch 9, an unloading valve is controlled to be switched on, and the dangerous action (the extension, the downward amplitude and the lifting hook of a suspension arm) direction of the ascending moment increase is in an unloading state, so that the dangerous action is limited, and the man-machine safety is protected.
Claims (4)
1. The utility model provides a soft leg protection device of landing leg for self-walking hoist which characterized in that: the device comprises an inner movable supporting leg (4), an outer movable supporting leg (6) and an outer movable telescopic supporting leg (7), wherein one end of the inner movable supporting leg (4) is movably connected with a connecting frame (2), the other end of the inner movable supporting leg (4) is provided with a hinged disc, the hinged disc is movably connected with a fluctuation oil cylinder (3), the other end of the fluctuation oil cylinder (3) is movably connected with the connecting frame (2), the hinged disc is also fixedly connected with the outer movable supporting leg (6), the outer movable telescopic supporting leg (7) is sleeved in the outer movable supporting leg (6), the extending end of the outer movable telescopic supporting leg (7) is connected with a universal supporting leg disc (8), and an air spring (5) is connected between the inner movable supporting leg (4) and the hinged disc; a travel switch collision plate (10) is arranged at one end of the fluctuation oil cylinder (3) hinged with the connecting frame (2), a travel switch (9) is arranged on the connecting frame (2), the travel switch (9) controls the on-off of the electromagnetic valve, and the fluctuation oil cylinder (3) is hinged with the connecting frame (2) in a floating mode.
2. The leg protector for a self-propelled crane according to claim 1, wherein: the travel switch collision plate (10) comprises a bent steel plate and a cylinder welded at the free end of the steel plate.
3. The leg protector for a self-propelled crane according to claim 1, wherein: the heave oil cylinder (3) is provided with a waist-shaped hole, and the pin shaft penetrates through the waist-shaped hole of the heave oil cylinder (3) and is in floating hinge connection with the connecting frame (2).
4. The leg protector for a self-propelled crane according to claim 3, wherein: the waist-shaped hole is arranged at the bottom of the heave oil cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921182312.3U CN210366742U (en) | 2019-07-25 | 2019-07-25 | Soft leg protection device of landing leg for self-walking crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921182312.3U CN210366742U (en) | 2019-07-25 | 2019-07-25 | Soft leg protection device of landing leg for self-walking crane |
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| Publication Number | Publication Date |
|---|---|
| CN210366742U true CN210366742U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921182312.3U Active CN210366742U (en) | 2019-07-25 | 2019-07-25 | Soft leg protection device of landing leg for self-walking crane |
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| CN (1) | CN210366742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304561A (en) * | 2019-07-25 | 2019-10-08 | 徐州徐工随车起重机有限公司 | From the walking soft leg protective device of crane supporting leg |
-
2019
- 2019-07-25 CN CN201921182312.3U patent/CN210366742U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304561A (en) * | 2019-07-25 | 2019-10-08 | 徐州徐工随车起重机有限公司 | From the walking soft leg protective device of crane supporting leg |
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