CN112141914A - Automobile crane and rear supporting leg assembly thereof - Google Patents
Automobile crane and rear supporting leg assembly thereof Download PDFInfo
- Publication number
- CN112141914A CN112141914A CN201910580103.2A CN201910580103A CN112141914A CN 112141914 A CN112141914 A CN 112141914A CN 201910580103 A CN201910580103 A CN 201910580103A CN 112141914 A CN112141914 A CN 112141914A
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- Prior art keywords
- leg
- support leg
- supporting
- support
- landing leg
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to hoisting equipment, in particular to an automobile crane and a rear support leg assembly thereof. The back landing leg subassembly includes horizontal landing leg, support landing leg, articulated seat and limit structure, and the flexible end department of horizontal landing leg is provided with articulated seat, and it is articulated with articulated seat that the support landing leg passes through the landing leg articulated shaft, and the landing leg articulated shaft extends along the flexible direction of horizontal landing leg, and removable cartridge has spacing round pin axle on the articulated seat, when the support landing leg is in vertical state, carries on spacingly to the support landing leg in the both sides that support the landing leg rotation direction. When the supporting is needed, a limiting pin shaft is installed, and the limiting pin shaft limits the two sides of the supporting leg so that the supporting leg is kept vertical; when the automobile crane turns in a narrow and small place, the limiting structure is detached, the supporting legs are supported on the ground in an inclined mode, after the supporting legs extend, the supporting legs push the tail portion of the automobile crane to enable the automobile crane to rotate by a certain angle, the automobile crane is assisted to turn, and accordingly the passing performance of the automobile crane is improved.
Description
Technical Field
The invention relates to hoisting equipment, in particular to an automobile crane and a rear support leg assembly thereof.
Background
The automobile crane is one kind of crane installed on universal automobile chassis or special chassis. The automobile crane has the characteristics of high running speed and strong maneuverability, is suitable for quickly converting an operation site from a long distance, but cannot carry and run, and has long body and large turning radius, so the passing performance is poor. Generally, an automobile crane is provided with four supporting legs which are arranged on an underframe and arranged on two sides of an automobile body in an H shape or an X shape, and the supporting legs extend outwards to land during hoisting work to increase the span of a bearing surface. However, once the crane is suspended at the rear, the front legs are easily tilted away from the ground, and in a serious case, a backward tilting accident may even occur.
The chinese utility model patent with the publication number of grant CN202131034U discloses a five-legged crane, which is provided with the fifth leg on the chassis of the tail, also is the rear leg, increases the span of the chassis landing, avoids the crane to have the backward tipping accident, but still has the problem that the steering is difficult to be carried out in some narrow places, which leads to, and the passing performance is relatively poor because the automobile body is longer and the turning radius is relatively large.
Disclosure of Invention
The invention aims to provide an automobile crane with better passing performance and a rear supporting leg assembly for improving the passing performance of the automobile crane.
In order to achieve the purpose, the technical scheme of the rear leg assembly is as follows:
the rear supporting leg assembly comprises a horizontal supporting leg, a supporting leg, a hinge seat and a limiting structure, wherein the horizontal supporting leg is arranged at the tail part of the chassis of the automobile crane and stretches along the front-back direction; the hinged seat is arranged at the telescopic end of the horizontal supporting leg; the support leg is hinged with the hinge seat through a leg hinge shaft, the hinge shaft extends along the front-back direction, and the lower end of the support leg is provided with a support leg; the detachable cartridge of spacing round pin axle is on articulated seat, and when supporting the landing leg and being in vertical state, it is spacing to supporting the landing leg in the both sides that support the landing leg rotation direction, makes to support the landing leg and keeps at vertical state.
The rear supporting leg assembly has the beneficial effects that: the support leg of the rear leg assembly is hinged on the horizontal leg, and the extending direction of the hinged shaft is the same as the telescopic direction of the horizontal leg, so that the rear leg assembly can rotate in a vertical plane. When the rear supporting leg assembly is required to support, the supporting leg is limited at two sides of the rotating direction of the supporting leg through mounting limiting pin shafts, so that the supporting leg is supported in the vertical direction; when the automobile crane needs to turn on narrow and small occasions, the limiting structure can be detached, the supporting legs are supported on the ground in an inclined mode, after the supporting legs extend, the supporting legs push the tail portion of the automobile crane to enable the automobile crane to rotate in place for a certain angle, the automobile crane is assisted to turn, and therefore the passing performance of the automobile crane is improved.
Further, articulated seat includes two along fore-and-aft direction interval and parallel arrangement's support landing leg fixed plate, landing leg articulated shaft perpendicular to face wears to adorn on two support landing leg fixed plates, supports the landing leg and is located between two support landing leg fixed plates, spacing round pin axle cartridge is in the left and right sides that supports the landing leg fixed plate. Support landing leg fixed plate simple structure to intensity is great, can carry out stable support to landing leg articulated shaft and limit structure.
Furthermore, the upper end of the supporting leg fixing plate is provided with a notch with an upward opening, the shape of the notch is matched with the bottom of the telescopic end of the horizontal leg, the supporting leg fixing plate is welded with the telescopic end of the horizontal leg at the notch, the left side and the right side of the lower end of the supporting leg fixing plate are respectively provided with a lug in an outward protruding mode, and the limiting pin shaft is inserted into the lugs. Set up the opening on supporting leg fixed plate and can increase the welding area with horizontal landing leg, improve structural strength.
Furthermore, the hinged seat is provided with an opening above the limit pin shaft for the support leg to pass through, and when the support leg is in an inclined state, namely the support leg passes through the opening, the limit pin shaft blocks the support leg upwards at one side of the support leg close to the lower side. The automobile crane can swing the supporting legs to one side in the running process so as to place the supporting legs, and the passing performance of the automobile crane is improved.
Further, the stabilizer blade is articulated with the support landing leg through the stabilizer blade articulated shaft, and the stabilizer blade articulated shaft extends along fore-and-aft direction. The supporting legs can be always tightly attached to the ground after being connected with the supporting legs, and the supporting is convenient.
In order to realize the purpose, the technical scheme of the automobile crane is as follows:
the automobile crane comprises a chassis and a rear support leg assembly arranged at the tail of the chassis, wherein the rear support leg assembly comprises a horizontal support leg, a support leg, a hinge seat and a limiting structure, and the horizontal support leg is arranged at the tail of the chassis of the automobile crane and stretches back and forth; the hinged seat is arranged at the telescopic end of the horizontal supporting leg; the support leg is hinged with the hinge seat through a leg hinge shaft, the hinge shaft extends along the front-back direction, and the lower end of the support leg is provided with a support leg; the detachable cartridge of spacing round pin axle is on articulated seat, and when supporting the landing leg and being in vertical state, it is spacing to supporting the landing leg in the both sides that support the landing leg rotation direction, makes to support the landing leg and keeps at vertical state.
The automobile crane has the beneficial effects that: the support leg of the rear leg assembly of the automobile crane is hinged on the horizontal leg, and the extending direction of the hinged shaft is the same as the telescopic direction of the horizontal leg, so that the rear leg assembly can rotate in a vertical plane. When the rear supporting leg assembly is required to support, the supporting leg is limited at two sides of the rotating direction of the supporting leg through mounting limiting pin shafts, so that the supporting leg is supported in the vertical direction; when the automobile crane needs to turn on narrow and small occasions, the limiting pin shaft can be detached, the supporting legs are supported on the ground in an inclined mode, after the supporting legs extend, the supporting legs push the tail portion of the automobile crane to enable the automobile crane to rotate in situ by a certain angle, the automobile crane is assisted to turn, and accordingly the passing performance of the automobile crane is improved.
Further, articulated seat includes two along fore-and-aft direction interval and parallel arrangement's support landing leg fixed plate, landing leg articulated shaft perpendicular to face wears to adorn on two support landing leg fixed plates, supports the landing leg and is located between two support landing leg fixed plates, spacing round pin axle cartridge is in the left and right sides that supports the landing leg fixed plate. Support landing leg fixed plate simple structure to intensity is great, can carry out stable support to landing leg articulated shaft and spacing round pin axle.
Furthermore, the upper end of the supporting leg fixing plate is provided with a notch with an upward opening, the shape of the notch is matched with the bottom of the telescopic end of the horizontal leg, the supporting leg fixing plate is welded with the telescopic end of the horizontal leg at the notch, the left side and the right side of the lower end of the supporting leg fixing plate are respectively provided with a lug in an outward protruding mode, and the limiting pin shaft is inserted into the lugs. Set up the opening on supporting leg fixed plate and can increase the welding area with horizontal landing leg, improve structural strength.
Furthermore, the hinged seat is provided with an opening above the limit pin shaft for the support leg to pass through, and when the support leg is in an inclined state, namely the support leg passes through the opening, the limit pin shaft blocks the support leg upwards at one side of the support leg close to the lower side. The automobile crane can swing the supporting legs to one side in the running process so as to place the supporting legs, and the passing performance of the automobile crane is improved.
Further, the stabilizer blade is articulated with the support landing leg through the stabilizer blade articulated shaft, and the stabilizer blade articulated shaft extends along fore-and-aft direction. The supporting legs can be always tightly attached to the ground after being connected with the supporting legs, and the supporting is convenient.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a rear leg assembly of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the rear leg assembly of the present invention at the movable leg box;
FIG. 3 is a schematic view of a rear leg assembly of an embodiment of the present invention in a position for use with a mobile crane during travel;
FIG. 4 is a schematic structural view of a truck crane according to an embodiment of the present invention;
description of reference numerals: 1-oil cylinder pin shaft; 2-horizontal oil cylinder; 3-fixing the leg box; 4-a movable leg box; 5-articulated shaft of the support leg; 6-limiting pin shaft; 7-supporting the oil cylinder; 8-leg hinge axis; 9-a leg; 10-supporting leg fixing plates; 11-horizontal cylinder mounting plate; 12-oil cylinder pin shaft; 13-Chassis.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In the embodiment of the rear leg assembly of the present invention, as shown in fig. 1, the rear leg assembly mainly includes a horizontal leg and a support leg, and the horizontal leg is installed at the tail of a chassis 13 of an automobile crane and can be extended and contracted in the front-rear direction. The supporting legs are hinged to the horizontal supporting legs through supporting leg hinged shafts 5, the supporting leg hinged shafts 5 are parallel to the stretching direction of the horizontal supporting legs, and therefore the supporting legs can rotate in the plane perpendicular to the stretching direction of the horizontal supporting legs.
Specifically, as shown in fig. 1 and 2, the horizontal leg includes a fixed leg box 3, a movable leg box 4, and a horizontal cylinder 2 disposed between the fixed leg box 3 and the movable leg box 4. The movable supporting leg box 4 and the fixed supporting leg box 3 are respectively provided with one end in the two ends along the length direction as an opening structure, and the movable supporting leg box 4 is nested in the fixed supporting leg box 3 in a mode that the opening faces the fixed supporting leg box 3 and is in sliding fit with the fixed supporting leg box 3. The cylinder body of the horizontal oil cylinder 2 is fixed on the wall of the fixed supporting leg box 3 on one side in the length direction through an oil cylinder pin shaft 121, two horizontal oil cylinder mounting plates 11 arranged in the width direction of the movable supporting leg box 4 are fixed in the movable supporting leg box 4, and a piston rod of the horizontal oil cylinder 2 is fixed on the horizontal oil cylinder mounting plates 11 through the oil cylinder pin shaft 121.
The tip of activity landing leg case 4 is articulated with the support leg through articulated seat, and articulated seat includes two support leg fixed plates, supports the below of landing leg fixed plate welding at 4 rear ends of activity landing leg case, and two face perpendicular to horizontal landing leg of supporting leg fixed plate 10 are flexible direction and are arranged along the flexible direction interval of horizontal landing leg, wear to be equipped with on the support leg fixed plate 10 along the landing leg articulated shaft 5 that the flexible direction of horizontal landing leg extends. The supporting leg mainly comprises a supporting oil cylinder 7, the cylinder body of the supporting oil cylinder 7 is hinged to a supporting leg fixing plate through a supporting leg hinged shaft 5, the bottom end of the supporting leg is supported, namely the end part of a piston rod of the supporting oil cylinder 7 is hinged to a supporting leg 9 through a supporting leg 9 hinged shaft 8, the extending direction of the supporting leg 9 hinged shaft 8 is parallel to the extending direction of the supporting leg hinged shaft 5, the supporting leg is enabled to support, and the supporting leg 9 is always tightly attached to the ground.
Because the support landing leg articulates the tip at horizontal landing leg, support the landing leg and can rotate in vertical plane, in order to make the support landing leg can support mobile crane's chassis 13 under vertical state, still need set up spacing round pin axle 6 and carry on spacingly to supporting the landing leg. The two limiting pin shafts 6 are arranged on the two supporting leg fixing plates 10 in a penetrating mode, can be arranged on the two supporting leg fixing plates 10 in a penetrating mode and are symmetrically arranged on the vertical plane where the supporting leg hinge shafts 5 are located, and the distance between the two limiting pin shafts 6 is equal to the width of the corresponding position of the supporting leg and the limiting pin shafts 6 so as to stop the supporting leg on the two sides of the rotating direction of the supporting leg. As shown in fig. 3, an opening for the supporting leg to pass through is formed between the limiting pin shaft 6 and the horizontal leg, so that the limiting pin shaft 6 can limit the supporting leg in a vertical state, and also can swing the supporting leg to one side when the automobile crane is in a driving state, and the limiting pin shaft 6 stops the supporting leg upwards at the side below the supporting leg, so as to improve the distance between the bottom of the supporting leg and the ground, and further improve the passing performance of the automobile crane.
As an optimized structure of the supporting leg fixing plate, the upper end of the supporting leg fixing plate 10 is provided with a notch with an upward opening, the shape of the notch is matched with the bottom of the telescopic end of the horizontal leg, the supporting leg fixing plate is welded with the telescopic end of the horizontal leg at the notch, the left side and the right side of the lower end of the supporting leg fixing plate 10 are respectively provided with a lug in an outward protruding mode, and the limiting pin shaft is inserted into the lugs. Set up the opening on supporting leg fixed plate and can increase the welding area with horizontal landing leg, improve structural strength.
When the automobile crane needs to lift an object, the horizontal supporting leg is extended, the supporting leg is in a vertical state, the two sides of the rotating direction of the supporting leg are blocked through the limiting pin shafts, the supporting leg is limited in the vertical state, and the crane can normally lift the object. When the automobile crane runs, the supporting legs can be swung to one side, and the supporting legs are upwards blocked by the side, close to the small side, of the supporting legs through the limiting pin shaft on one side, so that the distance between the bottoms of the supporting legs and the ground is increased, and the passing performance of the automobile crane is improved. When the automobile crane needs to turn in narrow places, the limiting pin shaft can be detached, the supporting leg is obliquely supported on the ground, then the supporting leg is continuously extended, the supporting leg pushes the tail part of the automobile crane to enable the automobile crane to rotate in situ by a certain angle, the automobile crane is assisted to turn, and the passing performance of the automobile crane is further improved.
In other embodiments, the support leg hinge shaft may also be disposed in the movable support leg box, an opening for the support cylinder to extend into is formed in a box wall at the bottom of the movable support leg box, and the support cylinder extends into the movable support leg box and is connected with the support leg hinge shaft.
In other embodiments, the limiting pin shafts can also be arranged in two rows at intervals, and the limiting pin shaft in each row extends up and down, so that the blocking strength of the supporting legs is improved.
In the embodiment of the mobile crane of the present invention, as shown in fig. 4, the mobile crane includes a chassis 13, four legs arranged in an H shape are disposed on two sides of the chassis 13, a rear leg assembly is mounted in the middle of the tail of the chassis, and a horizontal leg in the rear leg assembly extends and retracts in the front-rear direction of the mobile crane. The structure of the rear leg assembly in this embodiment is the same as that in the above-described specific embodiment of the rear leg assembly, and is not described herein again.
Claims (10)
1. A rear leg assembly, comprising:
the horizontal supporting leg is used for being installed at the tail part of the chassis of the automobile crane and stretching along the front-back direction;
the hinged seat is arranged at the telescopic end of the horizontal supporting leg;
the support leg is hinged with the hinge seat through a leg hinge shaft, the hinge shaft extends along the front-back direction, and the lower end of the support leg is provided with a support leg;
the limiting pin shaft is detachably inserted into the hinge seat, and when the supporting legs are in a vertical state, the supporting legs are limited on two sides of the rotating direction of the supporting legs, so that the supporting legs are kept in the vertical state.
2. The rear leg assembly as claimed in claim 1, wherein the hinge base includes two support leg fixing plates spaced apart from each other in a front-rear direction and arranged in parallel, the leg hinge shaft is mounted to the support leg fixing plates perpendicularly to the plate surface, the support leg is disposed between the support leg fixing plates, and the stopper pin shafts are inserted into left and right sides of the support leg fixing plates.
3. The rear leg assembly as claimed in claim 2, wherein the upper end of the support leg fixing plate is provided with a notch with an upward opening, the shape of the notch is matched with the bottom of the telescopic end of the horizontal leg, the support leg fixing plate is welded with the telescopic end of the horizontal leg at the notch, the left side and the right side of the lower end of the support leg fixing plate are respectively provided with a lug in a protruding mode, and the limiting pin shaft is inserted into the lugs.
4. A rear leg assembly as claimed in claim 1, 2 or 3 wherein the hinge base has an opening above the limit pin through which the support leg passes, the limit pin stopping the support leg upwardly at a lower side of the support leg when the support leg is tilted, i.e. the support leg passes through the opening.
5. A rear leg assembly as claimed in claim 1, 2 or 3 wherein the foot is hingedly connected to the support leg by a foot hinge axis, the foot hinge axis extending in a fore-aft direction.
6. The utility model provides a mobile crane, includes the chassis and sets up the back landing leg subassembly at the chassis afterbody, characterized by, back landing leg subassembly includes:
the horizontal supporting leg is arranged at the tail part of the chassis of the automobile crane and stretches along the front and back directions of the automobile crane;
the hinged seat is arranged at the telescopic end of the horizontal supporting leg;
the support leg is hinged with the hinge seat through a leg hinge shaft, the hinge shaft extends along the front-back direction, and the lower end of the support leg is provided with a support leg;
the limiting pin shaft is detachably inserted into the hinge seat, and when the supporting legs are in a vertical state, the supporting legs are limited on two sides of the rotating direction of the supporting legs, so that the supporting legs are kept in the vertical state.
7. The automobile crane as claimed in claim 6, wherein the hinge seat comprises two support leg fixing plates spaced apart from each other in a front-rear direction and arranged in parallel, the leg hinge shaft is mounted to the support leg fixing plates perpendicular to the plate surface, the support leg is located between the support leg fixing plates, and the stopper pin shafts are inserted into left and right sides of the support leg fixing plates.
8. The automobile crane as claimed in claim 7, wherein the supporting leg fixing plate is provided with a notch with an upward opening at the upper end, the shape of the notch matches with the bottom of the telescopic end of the horizontal leg, the supporting leg fixing plate is welded with the telescopic end of the horizontal leg at the notch, the left and right sides of the lower end of the supporting leg fixing plate are respectively provided with a lug in an outward protruding manner, and the limiting pin shaft is inserted into the lug.
9. Mobile crane according to claim 6, 7 or 8, wherein the hinge base has an opening above the limit pin for the support leg to pass through, and the limit pin stops the support leg obliquely upwards at the lower side of the support leg when the support leg is in an inclined state, i.e. the support leg passes through the opening.
10. Truck crane according to claim 6 or 7 or 8, characterized in that the foot is articulated to the support leg by means of a foot articulation axis, which extends in the front-rear direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910580103.2A CN112141914A (en) | 2019-06-28 | 2019-06-28 | Automobile crane and rear supporting leg assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910580103.2A CN112141914A (en) | 2019-06-28 | 2019-06-28 | Automobile crane and rear supporting leg assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112141914A true CN112141914A (en) | 2020-12-29 |
Family
ID=73892152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910580103.2A Pending CN112141914A (en) | 2019-06-28 | 2019-06-28 | Automobile crane and rear supporting leg assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112141914A (en) |
-
2019
- 2019-06-28 CN CN201910580103.2A patent/CN112141914A/en active Pending
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