CN204297987U - Engineering machine and supporting leg device thereof - Google Patents
Engineering machine and supporting leg device thereof Download PDFInfo
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- CN204297987U CN204297987U CN201420788588.7U CN201420788588U CN204297987U CN 204297987 U CN204297987 U CN 204297987U CN 201420788588 U CN201420788588 U CN 201420788588U CN 204297987 U CN204297987 U CN 204297987U
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Abstract
The utility model relates to the technical field of engineering machinery, and discloses a support leg device of engineering machinery and the engineering machinery, wherein the support leg device comprises a frame and four support legs, each support leg comprises a fixed support leg box, a movable support leg and a horizontal oil cylinder, the tail part of the movable support leg is provided with a vertical oil cylinder, and the extending end of the vertical oil cylinder is provided with a first support leg plate; the foldable support leg is characterized in that a folding support frame is arranged on the movable support leg of at least one support leg, and a second support leg plate is arranged on the folding support frame; when each landing leg and folding support frame expand, form first span between the first supporting leg board of at least one landing leg and the first supporting leg board that is provided with the landing leg of folding support frame, and form the second span between the second supporting leg board of folding support frame, the second span is greater than first span. The support leg device of the engineering machinery can improve the anti-tipping capacity and stability of the engineering machinery when the frame works in the direction facing the support leg pair, and improve the lifting capacity of the engineering machinery in the direction facing the support leg pair.
Description
Technical Field
The utility model relates to an engineering machine tool technical field, in particular to engineering machine tool's landing leg device and engineering machine tool.
Background
In the field of engineering machinery, a plurality of engineering machinery need to be provided with a supporting leg device so as to improve the safety and stability of the engineering machinery during working.
Because the H-shaped supporting leg device does not need a supporting leg swinging space, the engineering machinery adopting the H-shaped supporting leg device can be better suitable for construction in narrow and small places.
As shown in fig. 1, the H-shaped leg assembly includes a frame 01, four legs, such as a leg 02, a leg 03, a leg 04, and a leg 05, each of which has a movable leg and a fixed leg box. In each supporting leg, a fixed supporting leg box is rigidly connected with a frame 01 in a welding mode, a movable supporting leg is arranged in the fixed supporting leg box and internally provided with a horizontal oil cylinder, one end of the horizontal oil cylinder is connected with the fixed supporting leg box, the other end of the horizontal oil cylinder is connected with the movable supporting leg, a vertical oil cylinder is arranged at the tail part of the movable supporting leg, and a foot supporting plate is arranged at the extending end of the vertical oil cylinder. As shown in fig. 1, a vertical oil cylinder 021 is installed at the tail part of the supporting leg 02, and a supporting leg plate 022 is arranged at the extending end of the vertical oil cylinder 021; the tail of the supporting leg 03 is provided with a vertical oil cylinder 031, and the extending end of the vertical oil cylinder 031 is provided with a supporting leg plate 032; a vertical oil cylinder 041 is arranged at the tail part of the supporting leg 04, and a supporting leg plate 042 is arranged at the extending end of the vertical oil cylinder 041; the tail of the supporting leg 05 is provided with a vertical oil cylinder 051, and the extending end of the vertical oil cylinder 051 is provided with a supporting leg plate 052.
Before the engineering machinery works, each supporting leg controls the movable supporting leg to horizontally extend out of the fixed supporting leg box through the horizontal oil cylinder, and then controls the supporting leg plate to extend out through the vertical oil cylinder, so that the frame 01 is supported, and the frame 01 is separated from the ground. The longitudinal span of the legs in the H-leg arrangement is shown as a in fig. 1 and the transverse span is shown as b in fig. 1.
However, since the working conditions of the engineering machine are more during operation, in order to lift an object to a set position, the longitudinal span or the transverse span of the unfolded support legs of the engineering machine cannot meet the operation requirements of the engineering machine, so that the anti-tipping capability and the stability of the engineering machine during operation are poor, and the lifting capability of the engineering machine is influenced to a certain extent.
SUMMERY OF THE UTILITY MODEL
The utility model provides an engineering machine's landing leg device and engineering machine tool, this landing leg device can improve the anti ability and the stability of overturning of engineering machine tool jack-up during operation, and then improve engineering machine tool's hoisting capacity.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a supporting leg device of engineering machinery comprises a frame and four supporting legs, wherein each supporting leg comprises a fixed supporting leg box fixed on the frame, a movable supporting leg arranged on the fixed supporting leg box and a horizontal oil cylinder driving the movable supporting leg to relatively extend and retract with the fixed supporting leg box, a vertical oil cylinder is arranged at the tail part of the movable supporting leg, and a first supporting leg plate is arranged at the extending end of the vertical oil cylinder; a folding support frame is arranged on the movable supporting leg of at least one supporting leg, and a second supporting foot plate is arranged on the folding support frame; when each landing leg and the folding support frame are unfolded, a first span is formed between the first supporting foot plate of at least one landing leg and the first supporting foot plate of the landing leg provided with the folding support frame, and a second span is formed between the first supporting foot plate of the at least one landing leg and the second supporting foot plate of the folding support frame, wherein the second span is larger than the first span.
In the above-mentioned leg support device of the construction machine, when the legs and the folding support frame are unfolded, a first span is formed between the first leg support plate of at least one leg support and the first leg support plate of the leg support provided with the folding support frame, and a second span is formed between the first leg support plate of the at least one leg support and the second leg support plate of the folding support frame; because the second span is larger than the first span, the anti-tipping capacity and the stability of the engineering machinery can be improved when the frame faces the supporting leg and works along the second span direction, and further the hoisting capacity of the engineering machinery is improved when the frame faces the supporting leg and along the second span direction.
Preferably, the folding support frame comprises at least one folding arm and a driving oil cylinder which corresponds to the folding arm one by one and drives the folding arm to unfold or fold.
Preferably, the folding support frame includes a first arm, a second arm, a first driving cylinder, a second driving cylinder, wherein:
one end of the first folding arm is mounted at the tail part of a movable support leg in the support leg through a first pivot shaft, the other end of the first folding arm is connected with one end of a second folding arm through a second pivot shaft, and the second support foot plate is mounted at the other end of the second folding arm;
one end of the first driving oil cylinder is mounted on the movable supporting leg, and the other end of the first driving oil cylinder is mounted on the first folding arm; one end of the second driving oil cylinder is installed on the first folding arm, and the other end of the second driving oil cylinder is installed on the second folding arm.
Preferably, one end of the first folding arm is mounted at the tail of a movable leg of the legs through a first pivot shaft, and specifically includes:
the tail of the movable supporting leg is fixedly provided with a connecting plate, and the first pivot shaft is fixed on the connecting plate.
Preferably, the connecting plate and the movable leg are welded, the first pivot shaft and the connecting plate are welded, and the first folding arm is provided with a through hole matched with the first pivot shaft.
Preferably, along the axial lead direction of first pivotal axis, the length of first pivotal axis is greater than the thickness of first book arm, just first pivotal axis is located the position cover that first book arm deviates from connecting plate one side is equipped with the packing ring, is located the packing ring deviates from the pinhole of first book arm one side, peg has been pegged graft in the pinhole.
Preferably, two of the four legs have the folding support frame, and the two legs provided with the folding support frame are adjacent, wherein:
the folding support frames are positioned on two sides of the frame and are parallel to the traveling direction of the engineering machinery when being unfolded; or,
the folding support frame is positioned on the same side of the frame and is vertical to the traveling direction of the engineering machinery when being unfolded.
Preferably, four of the legs are each provided with the folding support frame, wherein:
the folding support frame is completely parallel to the traveling direction of the engineering machinery when unfolded; or,
and the folding support frame is completely vertical to the walking direction of the engineering machinery when unfolded.
The utility model also provides an engineering machine tool, this engineering machine tool include an arbitrary landing leg device that provides among the above-mentioned technical scheme.
Preferably, the engineering machinery is an automobile crane.
Drawings
Fig. 1 is a schematic structural diagram of an H-shaped leg device used in a conventional construction machine;
fig. 2a to 2f are schematic views of expansion structures of several types of leg devices provided in the embodiments of the present invention;
FIG. 3 is an enlarged view of a portion of the leg assembly shown in FIG. 2a at location D;
FIG. 4 is a schematic view of the structure shown in FIG. 3 in the direction A;
FIG. 5 is a schematic view of the structure shown in FIG. 4 in the direction B;
fig. 6 is a schematic view of the folding support stand of the structure shown in fig. 5 in a folded state.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2a to 2f, wherein fig. 2a to 2f are schematic views of an expanded structure of several types of leg devices provided in an embodiment of the present invention, a direction C shown in fig. 2a to 2f is a forward direction of the engineering machine, and is set to facilitate description of working principles of the following embodiments: taking the orientation shown in any one of fig. 2a to 2f as an example, the direction indicated by the direction C shown in fig. 2a to 2f is referred to as "front", the direction opposite to the direction C is referred to as "rear", the upper side of the vehicle body frame 1 is referred to as "right", and the lower side of the vehicle body frame 1 is referred to as "left".
As shown in fig. 2a to 2f, the leg device of the engineering machine provided by the embodiment of the present invention includes a frame 1 and four legs, each leg includes a fixed leg box fixed to the frame 1, a movable leg installed in the fixed leg box, and a horizontal oil cylinder driving the movable leg to relatively extend and retract with the fixed leg box, the tail of the movable leg is provided with a vertical oil cylinder, and the extending end of the vertical oil cylinder is provided with a first leg support plate; taking the example shown in fig. 2a as an example, the leg device comprises a frame 1, a leg 2, a leg 3, a leg 4 and a leg 5, wherein, taking the leg 2 shown in fig. 2a as an example, the leg 2 comprises a fixed leg box 23 fixed on the frame 1, a movable leg 25 mounted on the fixed leg box 23, and a horizontal oil cylinder 24 driving the movable leg 25 to extend and retract relative to the fixed leg box 23, a vertical oil cylinder 21 is arranged at the tail part of the movable leg 25, and a first leg plate 22 is arranged at the extending end of the vertical oil cylinder 21; similarly, as shown in fig. 2a, the tail of the movable leg of the leg 3 is provided with a vertical cylinder 31, and the extending end of the vertical cylinder 31 is provided with a first leg plate 32; the tail part of the movable support leg of the support leg 4 is provided with a vertical oil cylinder 41, and the extending end of the vertical oil cylinder 41 is provided with a first support leg plate 42; the tail part of the movable support leg of the support leg 5 is provided with a vertical oil cylinder 51, and the extending end of the vertical oil cylinder 51 is provided with a first support leg plate 52;
wherein, a folding support frame 6 is arranged on the movable supporting leg of at least one of the four supporting legs, and a second supporting foot plate 61 is arranged on the folding support frame 6; when each leg and the folding support frame 6 are unfolded, a first span is formed between the first leg plate of at least one leg and the first leg plate of the leg provided with the folding support frame 6, and a second span is formed between the first leg plate and the second leg plate 61 of the folding support frame 6, and the second span is larger than the first span.
In the leg support device of the construction machine, when the legs and the folding support frame 6 are unfolded, a first span is formed between the first leg support of at least one leg and the first leg support of the leg on which the folding support frame 6 is provided, and a second span is formed between the first leg support and the second leg support 61 of the folding support frame 6; because the second span is larger than the first span, the anti-tipping capacity and the stability of the engineering machinery can be improved when the frame faces the supporting leg and works along the second span direction, and further the hoisting capacity of the engineering machinery is improved when the frame faces the supporting leg and along the second span direction.
Therefore, the supporting leg device can improve the anti-overturning capacity and stability of the engineering machinery during operation, and further improve the lifting capacity of the engineering machinery.
On the basis of the above embodiments, in a preferred embodiment, the folding support frame 6 includes at least one folding arm and a driving oil cylinder which corresponds to the folding arm one by one and drives the folding arm to unfold or fold.
Preferably, as shown in fig. 3, 4, 5 and 6, the folding support 6 includes a first folding arm 63, a second folding arm 64, a first driving cylinder 65 and a second driving cylinder 66, wherein:
one end of the first folding arm 63 is mounted at the tail of the movable leg of the leg through a first pivot shaft 68, the other end of the first folding arm is connected with one end of the second folding arm 64 through a second pivot shaft 67, and the second foot supporting plate 61 is mounted at the other end of the second folding arm 64;
one end of the first driving oil cylinder 65 is arranged on the movable supporting leg, and the other end is arranged on the first folding arm 63; the second driving cylinder 66 has one end mounted to the first folding arm 63 and the other end mounted to the second folding arm 64. The folding support frame 6 of above-mentioned structure can realize the expansion and folding of folding support frame 6 through first arm 63 and the second arm 64 that rolls over, can enough increase the flexibility of folding support frame 6 action, stability when can guarantee folding support frame 6 simultaneously again.
Specifically, as shown in fig. 4, taking the leg 5 as an example, one end of the first folding arm 63 is mounted at the tail of the movable leg in the leg 5 through a first pivot 68, which specifically includes:
the movable leg has a connecting plate 62 fixed to the rear thereof, and a first pivot shaft 68 fixed to the connecting plate 62.
More specifically, the connecting plate 62 is welded to the movable leg, and the first pivot shaft 68 is welded to the connecting plate 62, and the first folding arm 63 has a through hole that fits the first pivot shaft 68. The connecting plate 62 is welded to the upper part, so that the stability of connection between the connecting plate 62 and the movable leg of the leg can be ensured, and the mechanical strength of the part of the movable leg welded with the connecting plate 62 can be improved.
Preferably, with continued reference to fig. 4, along the axial line direction of the first pivot shaft 68, the length of the first pivot shaft 68 is greater than the thickness of the first folding arm 63, a gasket 681 and a pin hole 682 located on a side of the gasket 681 away from the first folding arm 63 are sleeved on a portion of the first pivot shaft 68 located on a side of the first folding arm 63 away from the connecting plate 62, and a split pin is inserted into the pin hole 682 to realize connection between the first folding arm 63 and the connecting plate 62 as well as the first pivot shaft 68.
In a preferred embodiment, as shown in fig. 4 and 6, continuing with the example of the folding support 6 provided on the leg 5, when the two legs in the pair of legs in the direction perpendicular to the traveling direction C of the construction machine have first foot rests on both sides of the frame:
the connecting plate 62 is fixed at the end of the movable leg away from the frame 1;
the axis of the first pivot shaft 68 is parallel to the telescopic direction of the movable leg relative to the fixed leg box;
the axis of the second pivot shaft 67 is parallel to the axis of the first pivot shaft 68.
In a preferred embodiment, two of the four legs have folding supports 6, and the two legs provided with folding supports 6 are adjacent, wherein:
the folding support frames 6 are positioned on two sides of the frame 1 and are parallel to the traveling direction of the engineering machinery when being unfolded; or,
the folding support frame 6 is positioned at the same side of the frame 1 and is vertical to the walking direction of the engineering machinery when being unfolded.
In one embodiment, as shown in fig. 2b, the leg 3 and the leg 4 of the four legs of the leg device are provided with folding supports 6, and the legs 3 and 4 have first leg plates at two sides of the frame 1; at this time, after the folding support frame 6 arranged on the movable leg of the leg 3 is unfolded, the second leg plate 61 is positioned at one side of a connecting line between the first leg plate 32 of the leg 3 and the first leg plate 42 of the leg 4, which is far away from the leg 2 and the leg 5; meanwhile, after the folding support frame 6 arranged on the movable support leg of the support leg 4 is unfolded, the second support leg plate 61 is positioned at one side of a connecting line between the first support leg plate 32 of the support leg 3 and the first support leg plate 42 of the support leg 4, which is far away from the support leg 2 and the support leg 5; therefore, after the leg 2, the leg 3, the leg 4, the leg 5, and the foldable support frame 6 provided by the leg 3 and the leg 4 are unfolded, along the traveling direction of the construction machine, the span formed between the first leg plate 22 of the leg 2 and the first leg plate 32 of the leg 3 is a shown in fig. 2b, and the second leg plate 61 provided on the foldable support frame 6 provided by the leg 3 and the leg 4 can increase the span along the traveling direction of the construction machine to the rear side of the frame by d, so that the span c along the traveling direction of the construction machine after the leg device of the structure shown in fig. 2b is unfolded satisfies: c is a + d; therefore, as shown in fig. 2b, the construction machine has a high anti-tipping capability and a high stability when lifted from the rear side of the frame 1, and the lifting capability of the construction machine from the rear side of the frame 1 can be increased.
Similarly, as shown in fig. 2c, in another specific embodiment, the legs 2 and 5 of the leg device are provided with the foldable support frames 6, at this time, when the legs of the leg device and the foldable support frames 6 are unfolded, along the traveling direction of the engineering machine, a span formed between the first leg plates 22 and 32 of the legs 2 and 3 is a shown in fig. 2b, and the second leg plates 61 provided on the foldable support frames 6 provided on the legs 2 and 5 can increase the span along the traveling direction of the engineering machine to the front side of the frame by f, so that the span e along the traveling direction of the engineering machine after the leg device of the structure shown in fig. 2c is unfolded satisfies: e ═ a + f; therefore, as shown in fig. 2c, the construction machine has a high anti-tipping capability and a high stability when lifted from the front side of the frame 1, and the lifting capability of the construction machine on the front side of the frame 1 can be increased.
Similarly, as shown in fig. 2e, in another specific embodiment, the legs 2 and 3 of the leg device are provided with the foldable support frames 6, at this time, when the legs of the leg device and the foldable support frames 6 are unfolded, along the direction perpendicular to the traveling direction of the engineering machine, the span formed between the first foot plate 32 of the leg 3 and the first foot plate 42 of the leg 4 is b shown in fig. 2e, and the second foot plate 61 provided on the foldable support frames 6 provided on the legs 2 and 3 can increase h the span along the direction perpendicular to the traveling direction of the engineering machine to the left side of the frame 1, so that the span k along the direction perpendicular to the traveling direction of the engineering machine after the leg device of the structure shown in fig. 2e is unfolded satisfies: k is b + h; therefore, as shown in fig. 2e, the lifting capacity of the construction machine on the left side of the frame 1 can be increased by providing high stability and high anti-tipping capacity when the construction machine is lifted on the left side of the frame 1.
Similarly, as shown in fig. 2f, in another specific embodiment, the legs 4 and 5 of the leg device are provided with the foldable support frames 6, at this time, when the legs of the leg device and the foldable support frames 6 are unfolded, along the direction perpendicular to the traveling direction of the engineering machine, the span formed between the first foot plate 32 of the leg 3 and the first foot plate 42 of the leg 4 is b shown in fig. 2e, and the second foot plate 61 provided on the foldable support frames 6 provided on the legs 4 and 5 can increase i the span along the direction perpendicular to the traveling direction of the engineering machine to the right side of the frame 1, so that the span m along the direction perpendicular to the traveling direction of the engineering machine after the leg device of the structure shown in fig. 2f is unfolded satisfies: m is b + i; therefore, as shown in fig. 2f, the lifting capacity of the construction machine on the right side of the frame 1 can be increased by providing a high anti-roll capability and a high stability when the construction machine is lifted on the right side of the frame 1.
In the leg device in the embodiment shown in fig. 2b, 2c, 2e, and 2f, only two of the four legs are provided with the folding support frame 6, so that the anti-tipping capability, the stability, and the lifting capability of the engineering machine on one side of the frame 1 can be improved.
Of course, in another preferred embodiment, four legs of the leg arrangement are each provided with a folding support 6, wherein:
when the folding support frame 6 is unfolded, the whole part is parallel to the walking direction of the engineering machinery; or,
the folding support frame 6 is completely vertical to the walking direction of the engineering machinery when unfolded.
In particular, reference may be made to the leg arrangement of the construction shown in fig. 2a and 2 d.
In the leg device of the structure shown in fig. 2a, when the leg 2 and the leg 5 are engaged with each other and the leg 3 and the leg 4 are engaged with each other, the span g of the construction machine satisfies, in the traveling direction of the construction machine (i.e., in the front-rear direction): g is a + f + d, where a is a span formed between the first leg plate 22 of the leg 2 and the first leg plate 32 of the leg 3 along the traveling direction of the construction machine, d is a span between the second leg plate 61 of the folding support frame 6 provided for the leg 3 and the first leg plate 32 of the leg 3 and located on the side where the first leg plate 32 deviates from the leg 2, and f is a span between the second leg plate 61 of the folding support frame 6 provided for the leg 2 and the first leg plate 22 of the leg 2 and located on the side where the first leg plate 22 deviates from the leg 3. Therefore, the leg device with the above structure can increase the span of the construction machine in the traveling direction of the construction machine by f toward the front side and by d toward the rear side, and can improve the anti-tipping capability and stability of the construction machine when the construction machine is lifted in the front and rear directions of the frame 1, and can improve the lifting capability of the construction machine in the front and rear directions of the frame 1.
Similarly, the leg device of the structure shown in fig. 2 is configured such that the leg 2 and the leg 3 are engaged with each other, and the leg 4 and the leg 5 are engaged with each other, and when each pair of legs is in the expanded state, the span j of the construction machine satisfies, in the direction perpendicular to the traveling direction of the construction machine (i.e., the left-right direction of the frame): j is b + i + h, wherein b is a span formed between the first leg plate 32 of the leg 3 and the first leg plate 42 of the leg 4 along a direction perpendicular to the traveling direction of the construction machine, h is a span between the second leg plate 61 of the folding support frame 6 provided for the leg 3 and the first leg plate 32 of the leg 3 and located on a side where the first leg plate 32 deviates from the leg 4, and i is a span between the second leg plate 61 of the folding support frame 6 provided for the leg 4 and the first leg plate 42 of the leg 4 and located on a side where the first leg plate 42 deviates from the leg 3. Therefore, the landing leg device with the structure can increase the span of the engineering machinery along the direction perpendicular to the walking direction of the engineering machinery to the left side by h and increase the span of the engineering machinery to the right side by i, so that the anti-overturning capacity and the stability of the engineering machinery during hoisting in the left side direction and the right side direction of the frame 1 can be improved, and the hoisting capacity of the engineering machinery in the left side direction and the right side direction of the frame 1 can be improved.
Additionally, the utility model also provides an engineering machine tool, this engineering machine tool includes the arbitrary landing leg device that provides in above-mentioned each embodiment.
It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A supporting leg device of engineering machinery comprises a frame and four supporting legs, wherein each supporting leg comprises a fixed supporting leg box fixed on the frame, a movable supporting leg arranged on the fixed supporting leg box and a horizontal oil cylinder driving the movable supporting leg to relatively extend and retract with the fixed supporting leg box, a vertical oil cylinder is arranged at the tail part of the movable supporting leg, and a first supporting leg plate is arranged at the extending end of the vertical oil cylinder; the foldable support leg is characterized in that a foldable support frame is arranged on the movable support leg of at least one support leg, and a second support leg plate is arranged on the foldable support frame; when each landing leg and the folding support frame are unfolded, a first span is formed between the first supporting foot plate of at least one landing leg and the first supporting foot plate of the landing leg provided with the folding support frame, and a second span is formed between the first supporting foot plate of the at least one landing leg and the second supporting foot plate of the folding support frame, wherein the second span is larger than the first span.
2. The leg device as claimed in claim 1, wherein the folding support frame comprises at least one folding arm and a driving oil cylinder corresponding to the folding arm one by one to drive the folding arm to unfold or fold.
3. The leg arrangement of claim 2, wherein the folding support frame comprises a first folding arm, a second folding arm, a first drive cylinder, a second drive cylinder, wherein:
one end of the first folding arm is mounted at the tail part of a movable support leg in the support leg through a first pivot shaft, the other end of the first folding arm is connected with one end of a second folding arm through a second pivot shaft, and the second support foot plate is mounted at the other end of the second folding arm;
one end of the first driving oil cylinder is mounted on the movable supporting leg, and the other end of the first driving oil cylinder is mounted on the first folding arm; one end of the second driving oil cylinder is installed on the first folding arm, and the other end of the second driving oil cylinder is installed on the second folding arm.
4. The leg device according to claim 3, wherein one end of the first folding arm is mounted to a tail portion of a movable leg of the leg through a first pivot shaft, and the leg device specifically comprises:
the tail of the movable supporting leg is fixedly provided with a connecting plate, and the first pivot shaft is fixed on the connecting plate.
5. The leg arrangement as claimed in claim 4, wherein the connecting plate is welded to the movable leg and the first pivot shaft is welded to the connecting plate, and the first folding arm has a through hole for fitting the first pivot shaft.
6. The leg device as claimed in claim 5, wherein along the axial line direction of the first pivot shaft, the length of the first pivot shaft is greater than the thickness of the first folding arm, a gasket is sleeved on the first pivot shaft at a position on one side of the first folding arm away from the connecting plate, a pin hole is arranged on one side of the gasket away from the first folding arm, and a split pin is inserted in the pin hole.
7. The leg arrangement as claimed in any one of claims 1 to 6, wherein two of the four legs have the folding support and the two legs having the folding support are adjacent, wherein:
the folding support frames are positioned on two sides of the frame and are parallel to the traveling direction of the engineering machinery when being unfolded; or,
the folding support frame is positioned on the same side of the frame and is vertical to the traveling direction of the engineering machinery when being unfolded.
8. The leg arrangement as claimed in any one of claims 1-6, wherein four of said legs are each provided with said folding support, wherein:
the folding support frame is completely parallel to the traveling direction of the engineering machinery when unfolded; or,
and the folding support frame is completely vertical to the walking direction of the engineering machinery when unfolded.
9. A working machine comprising a leg arrangement as claimed in any one of claims 1 to 8.
10. A working machine according to claim 9, characterized in that the working machine is a truck crane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420788588.7U CN204297987U (en) | 2014-12-12 | 2014-12-12 | Engineering machine and supporting leg device thereof |
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| CN201420788588.7U CN204297987U (en) | 2014-12-12 | 2014-12-12 | Engineering machine and supporting leg device thereof |
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| CN204297987U true CN204297987U (en) | 2015-04-29 |
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| CN109052199A (en) * | 2018-09-30 | 2018-12-21 | 三汽车制造有限公司 | Leg assembly and mechanical equipment |
| CN109552273A (en) * | 2017-09-26 | 2019-04-02 | 德国施维英有限公司 | Bending supporting leg with folding means |
| CN111926877A (en) * | 2020-06-04 | 2020-11-13 | 西安理工大学 | Water environment treatment dredging engineering machinery walking device |
| CN112158747A (en) * | 2020-09-12 | 2021-01-01 | 徐州市创盛工程机械有限公司 | Truck-mounted crane rear supporting leg with departure angle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109552273A (en) * | 2017-09-26 | 2019-04-02 | 德国施维英有限公司 | Bending supporting leg with folding means |
| CN108773769A (en) * | 2018-07-02 | 2018-11-09 | 合肥市春华起重机械有限公司 | A kind of crane adjustable supports and its application method |
| CN109052199A (en) * | 2018-09-30 | 2018-12-21 | 三汽车制造有限公司 | Leg assembly and mechanical equipment |
| CN109052199B (en) * | 2018-09-30 | 2024-01-19 | 三一汽车制造有限公司 | Leg assembly and mechanical equipment |
| CN111926877A (en) * | 2020-06-04 | 2020-11-13 | 西安理工大学 | Water environment treatment dredging engineering machinery walking device |
| CN112158747A (en) * | 2020-09-12 | 2021-01-01 | 徐州市创盛工程机械有限公司 | Truck-mounted crane rear supporting leg with departure angle |
| CN112158747B (en) * | 2020-09-12 | 2022-06-17 | 徐州市创盛工程机械有限公司 | Truck-mounted crane rear supporting leg with departure angle |
| CN113911934A (en) * | 2021-09-17 | 2022-01-11 | 合肥市春华起重机械有限公司 | Anti-rollover crane with high terrain adaptability |
| CN113911934B (en) * | 2021-09-17 | 2024-09-10 | 合肥市春华起重机械有限公司 | High topography adaptability's anti-rollover crane |
| CN114906748A (en) * | 2022-06-15 | 2022-08-16 | 青岛纳控智能科技有限公司 | Unit hydraulic support transfer robot |
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