CN110654996A - Supporting leg structure and crane - Google Patents
Supporting leg structure and crane Download PDFInfo
- Publication number
- CN110654996A CN110654996A CN201911063617.7A CN201911063617A CN110654996A CN 110654996 A CN110654996 A CN 110654996A CN 201911063617 A CN201911063617 A CN 201911063617A CN 110654996 A CN110654996 A CN 110654996A
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- leg
- supporting leg
- telescopic
- supporting
- assembly
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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
- B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to the field of engineering machinery, in particular to a supporting leg structure and a crane; the supporting leg structure comprises a first supporting leg, a second supporting leg and a telescopic assembly, wherein the first supporting leg is connected with the second supporting leg; the retraction assembly has an extended state and a retracted state; the telescopic component is arranged on the first supporting leg and can be matched with or separated from the second supporting leg; when the telescopic assembly is switched to the extending state and the telescopic assembly is matched with the second supporting leg, the first supporting leg and the second supporting leg are relatively fixed; when the telescopic assembly is switched to the retraction state, the telescopic assembly is separated from the second supporting leg, and the first supporting leg and the second supporting leg can rotate relatively. The support leg structure and the crane can stably fix the positions of the first support leg and the second support leg after the first support leg and the second support leg are unfolded, and risks are reduced.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a supporting leg structure and a crane.
Background
The wheel crane is widely applied to various construction operation processes due to the characteristic of convenient transition. In the case of a wheeled crane, the legs fulfill the basic function of supporting the frame by being connected to the frame.
The related art provides a wheeled crane in a structural form of a swing leg such that the leg is foldable and retractable, but it is difficult to stably fix the relative positions of a first leg and a second leg rotatably connected after the leg is unfolded, and there is a great risk.
Disclosure of Invention
The invention aims to provide a support leg structure and a crane, which can stably fix the relative positions of a first support leg and a second support leg after the first support leg and the second support leg are unfolded, and reduce risks.
The embodiment of the invention is realized by the following steps:
in a first aspect, an embodiment of the present invention provides a leg structure, including: the telescopic support comprises a first support leg, a second support leg and a telescopic assembly, wherein the first support leg is connected with the second support leg; the retraction assembly has an extended state and a retracted state; the telescopic component is arranged on the first supporting leg and can be matched with or separated from the second supporting leg; when the telescopic assembly is switched to the extending state and the telescopic assembly is matched with the second supporting leg, the first supporting leg and the second supporting leg are relatively fixed; when the telescopic assembly is switched to the retraction state, the telescopic assembly is separated from the second supporting leg, and the first supporting leg and the second supporting leg can rotate relatively.
In an alternative embodiment, the telescopic assembly comprises a telescopic oil cylinder and a fixing piece which are connected with each other, the telescopic oil cylinder is arranged on the first supporting leg, and the fixing piece is matched with or separated from the second supporting leg.
In an optional implementation mode, the second supporting leg is provided with a fixing hole, and when the first supporting leg and the second supporting leg are mutually unfolded and the telescopic oil cylinder drives the fixing piece to extend out, the fixing piece penetrates through the fixing hole.
In an optional embodiment, the first support leg comprises a first layer plate and a second layer plate which are arranged at intervals, the telescopic oil cylinder is arranged on the first layer plate, and the second layer plate is provided with a splicing hole; the telescopic oil cylinder is used for driving the fixing piece to extend out, so that the fixing piece penetrates through the insertion hole.
In an optional embodiment, the first leg is further provided with a limiting part, the limiting part is used for limiting the rotation angle of the second leg relative to the first leg, and when the second leg rotates to abut against the limiting part, the first leg and the second leg are unfolded mutually.
In an alternative embodiment, the leg structure further comprises a drive assembly disposed between the first leg and the second leg for driving the first leg and the second leg to rotate relative to each other.
In an alternative embodiment, the drive assembly includes a swing cylinder; when the swing oil cylinder extends, the first supporting leg and the second supporting leg are mutually unfolded; when the swing cylinder is shortened, the first support leg and the second support leg retract mutually.
In a second aspect, embodiments of the invention provide a crane comprising a leg structure according to any one of the preceding embodiments.
In an alternative embodiment, the crane further comprises a frame, the end of the first leg not connected to the second leg being connected to the frame.
In an alternative embodiment, the frame and the first leg are connected by at least two fasteners arranged side by side.
The supporting leg structure of the embodiment of the invention has the beneficial effects that: the support leg structure provided by the embodiment of the invention comprises the first support leg and the second support leg which can rotate mutually, when the telescopic assembly is switched to the extending state and is matched with the second support leg, the relative positions of the first support leg and the second support leg can be fixed, so that the relative positions of the first support leg and the second support leg can be stably fixed under the action of the telescopic assembly, and the first support leg and the second support leg are prevented from rotating.
The crane provided by the embodiment of the invention has the beneficial effects that: the crane provided by the embodiment of the invention comprises the support leg structure, the crane can fix the relative positions of the first support leg and the second support leg by using the telescopic assembly, and the risk caused by mutual rotation of the first support leg and the second support leg is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a leg structure according to an embodiment of the present invention;
FIG. 2 is an enlarged view taken at II in FIG. 1;
FIG. 3 is a schematic structural diagram of a crane according to an embodiment of the present invention;
fig. 4 is an enlarged view of the point iv in fig. 3.
Icon: 010-leg construction; 100-a first leg; 200-a second leg; 310-a connector; 320-a telescoping assembly; 321-a telescopic oil cylinder; 322-a fixing member; 110-a first ply; 120-a second ply; 130-a plug hole; 140-a limiting part; 150-a drive assembly; 020-crane; 400-vehicle frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like refer to orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and fig. 2, the present embodiment provides a leg structure 010, including: a first leg 100, a second leg 200, and a telescoping assembly 320, the first leg 100 and the second leg 200 being connected, the telescoping assembly 320 having an extended state and a retracted state; the telescopic assembly 320 is arranged on the first leg 100 and can be matched with or separated from the second leg 200; when the telescopic assembly 320 is switched to the extended state and the telescopic assembly is matched with the second leg support 200, the first leg support 100 and the second leg support 200 are relatively fixed; when the telescopic assembly 320 is switched to the retracted state, the telescopic assembly 320 is separated from the second leg 200, and the first leg 100 and the second leg 200 can rotate relatively.
The supporting leg structure 010 provided by the embodiment can be used for engineering machinery such as a crane 020 and an engineering vehicle.
The leg structure 010 of the embodiment can fix the relative positions of the first leg 100 and the second leg 200 when the telescopic assembly 320 is switched to the extended state and is matched with the second leg 200, so that the relative positions of the first leg 100 and the second leg 200 can be stably fixed under the action of the telescopic assembly 320, and the rotation between the first leg 100 and the second leg 200 is avoided.
Further, the leg structure 010 of the present embodiment includes a connecting member 310, the first leg 100 and the second leg 200 are connected by the connecting member 310, and the first leg 100 and the second leg 200 can relatively rotate around the connecting member 310.
The telescopic assembly 320 is disposed on the first leg 100; when first leg 100 and second leg 200 are extended from each other and retraction assembly 320 is switched to the extended state, retraction assembly 320 engages second leg 200 and first leg 100 and second leg 200 are relatively fixed.
The leg structure 010 of this embodiment is at work, can drive first leg 100 and second leg 200 and rotate around connecting piece 310 each other earlier, so that first leg 100 and second leg 200 expand each other, then will set up in the flexible subassembly 320 of first leg 100 and switch to the state of stretching out, so that flexible subassembly 320 and second leg 200 cooperate, and then with the rigidity of first leg 100 and second leg 200, at this moment, it is fixed jointly through connecting piece 310 and the flexible subassembly 320 that is located the state of stretching out between first leg 100 and the second leg 200, can avoid first leg 100 and second leg 200 to rotate around connecting piece 310 each other effectively. First leg 100 and second leg 200 are rotatable relative to each other about connection 310 only when retraction assembly 320 is switched to the retracted position and disengaged from second leg 200, i.e., first leg 100 and second leg 200 are rotatable about connection 310 to retract relative to each other only when retraction assembly 320 is switched to the retracted position and disengaged from second leg 200.
It should be noted that, referring to fig. 3 and 4, the spreading of the first leg 100 and the second leg 200 may refer to: the included angle between the first leg 100 and the second leg 200 is approximately 180 degrees, that is, the first leg 100 and the second leg 200 are arranged in a same straight line direction; the above-mentioned mutual retraction of the first leg 100 and the second leg 200 may refer to: the angle between the first leg 100 and the second leg 200 is less than 180 °, such as 135 °, 120 °, etc., i.e. the first leg 100 and the second leg 200 are not arranged in the same linear direction.
The connecting member 310 can be selected according to the requirement, and the connecting member 310 of the embodiment is a pin; in other embodiments, the connector 310 may also be a common shaft, bolt, etc.
Referring to fig. 2, the telescopic assembly 320 of the present embodiment includes a telescopic cylinder 321 and a fixing member 322 connected to each other, the telescopic cylinder 321 is disposed on the first leg 100, and the fixing member 322 is engaged with or separated from the second leg 200; when the first leg 100 and the second leg 200 are unfolded and the telescopic cylinder 321 drives the fixing member 322 to extend to match with the second leg 200, the first leg 100 and the second leg 200 are fixed relatively.
The second leg 200 of this embodiment is provided with a fixing hole (not shown), and when the first leg 100 and the second leg 200 are unfolded and the fixing member 322 is driven by the telescopic cylinder 321 to extend, the fixing member 322 is inserted into the fixing hole; therefore, when the first leg 100 and the second leg 200 are unfolded, the fixing member 322 is driven by the telescopic cylinder 321 to penetrate through the fixing hole of the second leg 200, so as to fix the positions of the first leg 100 and the second leg 200, and at this time, two connection points are provided between the first leg 100 and the second leg 200, that is, the first leg 100 and the second leg 200 are connected with the telescopic assembly 320 through the connecting member 310, so that the first leg 100 and the second leg 200 can be effectively prevented from rotating with each other. When the telescopic cylinder 321 drives the fixing member 322 to retract to be separated from the fixing hole, the first leg 100 and the second leg 200 can rotate relative to each other about the connecting member 310.
Referring to fig. 2, the first leg 100 of the present embodiment includes a first layer plate 110 and a second layer plate 120 arranged at an interval, a telescopic cylinder 321 is arranged on the first layer plate 110, and the second layer plate 120 is provided with a plugging hole 130; the telescopic cylinder 321 is used for driving the fixing member 322 to extend out, so that the fixing member 322 is inserted into the insertion hole 130. When the first leg 100 and the second leg 200 are unfolded and the telescopic cylinder 321 drives the fixing member 322 to extend, the fixing member 322 can sequentially pass through the fixing hole of the second leg 200 and the inserting hole 130 of the first leg 100, so that the positions of the first leg 100 and the second leg 200 can be more stably fixed by using the fixing member 322.
It should be noted that the first layer plate 110 and the second layer plate 120 may be arranged at an interval from top to bottom; further, a support member such as a support column is fixedly connected between the first layer plate 110 and the second layer plate 120.
The fixing member 322 can be selected according to the requirement, and the fixing member 322 of this embodiment is a bolt; in other embodiments, the fixing member 322 may also be a screw, a connecting shaft, or the like.
In other embodiments, an air cylinder, an electric push rod and the like can be selected to replace the hydraulic oil cylinder.
Referring to fig. 2, the first leg 100 of the present embodiment is further provided with a limiting portion 140, the limiting portion 140 is used for limiting a rotation angle of the second leg 200 relative to the first leg 100, and when the second leg 200 rotates to abut against the limiting portion 140, the first leg 100 and the second leg 200 are mutually unfolded; so set up, be favorable to quick, accurate with first landing leg 100 and second landing leg 200 to the state of expanding each other to make fixed orifices and spliced eye 130 relative, help flexible hydro-cylinder 321 drive mounting 322 to stretch out and peg graft with fixed orifices and spliced eye 130 in proper order, spacing portion 140's setting helps flexible subassembly 320 accurate and second landing leg 200 cooperation promptly, with the position of accurate fixed first landing leg 100 and the second landing leg 200 of expanding each other.
The specific structure of the limiting part 140 can be adjusted as required, and the limiting part 140 of this embodiment is a limiting block disposed on the first layer plate 110; in other embodiments, the position-limiting portion 140 may also be a position-limiting pillar or the like disposed on the first layer board 110.
Referring to fig. 4, the leg structure 010 of the present embodiment further includes a driving assembly 150 disposed between the first leg 100 and the second leg 200, wherein the driving assembly 150 is configured to drive the first leg 100 and the second leg 200 to rotate around the connecting member 310.
Further, the driving assembly 150 includes a swing cylinder; when the swing cylinder extends, the first leg 100 and the second leg 200 are unfolded with each other; when the swing cylinder is shortened, the first leg 100 and the second leg 200 are retracted to each other.
Both ends of the swing cylinder are rotatably connected with the first leg 100 and the second leg 200, respectively; when the swing cylinder is extended, the extended swing cylinder can push the second leg 200 and the first leg 100 to rotate around the connecting member 310 in a state of being separated and unfolded from each other; when the swing cylinder is shortened, the shortened swing cylinder can drive the second leg 200 and the first leg 100 to rotate around the connecting member 310 to a state of approaching and retracting each other.
When the supporting leg structure 010 of the embodiment is used, the swing oil cylinder can be used for driving the first supporting leg 100 and the second supporting leg 200 to be mutually unfolded, when the second supporting leg 200 is abutted to the limiting part 140 arranged on the first supporting leg 100, the fixing part 322 is driven by the hydraulic oil cylinder to extend out to be plugged into the fixing hole and the plugging hole 130, and then two connection fixing points can be formed between the unfolded first supporting leg 100 and the unfolded second supporting leg 200 under the combined action of the connecting part 310 and the telescopic assembly 320, so that the unfolded first supporting leg 100 and the unfolded second supporting leg 200 are stably fixed, and the unfolded first supporting leg 100 and the unfolded second supporting leg 200 are prevented from rotating. When the hydraulic cylinder drives the fixing member 322 to be separated from the fixing hole of the second leg 200, the swing cylinder may drive the first leg 100 and the second leg 200 to be retracted with each other.
In summary, the leg structure 010 provided in the embodiment of the present invention includes the first leg 100 and the second leg 200 that can rotate around the connecting member 310, when the first leg 100 and the second leg 200 are unfolded, the telescopic assembly 320 can be switched to the extended state, so that the telescopic assembly 320 disposed on the first leg 100 can be matched with the second leg 200, and further the first leg 100 and the second leg 200 that are unfolded can be fixed, so that the positions of the first leg 100 and the second leg 200 that are unfolded can be stably fixed under the combined action of the connecting member 310 and the telescopic assembly 320, and the first leg 100 and the second leg 200 can be prevented from rotating when the first leg 100 and the second leg 200 are unfolded.
Referring to fig. 3, the embodiment further provides a crane 020 including the leg structure 010.
The crane 020 may be a wheel crane.
The crane 020 of the embodiment can fix the positions of the first leg 100 and the second leg 200 by the connecting piece 310 and the telescopic assembly 320 together when the first leg 100 and the second leg 200 are unfolded, so that the risk caused by mutual rotation of the first leg 100 and the second leg 200 is reduced.
The number of the leg structures 010 of the crane 020 can be selected according to the requirement, and the crane 020 of the embodiment comprises four leg structures 010; in other embodiments, the crane 020 may also comprise six, eight leg structures 010, etc.
Further, referring to fig. 3 and fig. 4, in the embodiment, the crane 020 further includes a frame 400, and an end of the first leg 100 not connected to the second leg 200 is connected to the frame 400, that is, an end of the first leg 100 away from the connecting member 310 is connected to the frame 400; when the crane 020 is used, the swing oil cylinder is extended to drive the second supporting leg 200 to unfold relative to the first supporting leg 100, the telescopic assembly 320 is used for fixing the positions of the first supporting leg 100 and the second supporting leg 200, namely, the supporting leg structure 010 can be used for supporting the frame 400, two points of fixing are carried out between the unfolded first supporting leg 100 and the unfolded second supporting leg 200 through the connecting piece 310 and the telescopic assembly 320, and then the first supporting leg 100 and the second supporting leg 200 are not easy to rotate, so that the risk can be reduced.
It should be noted that the relative positions of the connecting member 310 and the telescopic assembly 320 on the first leg 100 are not specifically limited herein, since the second leg 200 can have different rotation directions by changing the relative positions of the connecting member 310 and the telescopic assembly 320 on the first leg 100.
The frame 400 and the first leg 100 of the present embodiment are connected by at least two fasteners (not shown) distributed in parallel; thus, the connection between the frame 400 and the leg structure 010 is more stable through at least two connection points between the frame 400 and the first leg 100, and the leg structure 010 is less likely to be unstable in rotation relative to the frame 400.
The fasteners may be, for example, bolts, screws, etc.
The number of the fasteners provided between each first leg 100 and the frame 400 may be, for example, 2, 3, 4, etc., and is not particularly limited herein.
It should be noted that other structures of the crane 020 are similar to those of the related art, and are not described herein again.
When the crane 020 of this embodiment is in use, the second leg 200 of each leg structure 010 can be unfolded relative to the first leg 100, and the telescopic assembly 320 is matched with the second leg 200, so that the frame 400 can be stably supported by the leg structure 010.
In summary, the crane 020 provided by the embodiment of the invention comprises the leg structure 010, and the crane 020 can fix the positions of the first leg 100 and the second leg 200 by using the connecting piece 310 and the telescopic assembly 320 together when the first leg 100 and the second leg 200 are unfolded, so that the risk caused by mutual rotation of the first leg 100 and the second leg 200 is reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A leg structure, comprising: the telescopic device comprises a first supporting leg, a second supporting leg and a telescopic assembly, wherein the first supporting leg is connected with the second supporting leg; the retraction assembly has an extended state and a retracted state; the telescopic assembly is arranged on the first supporting leg and can be matched with or separated from the second supporting leg;
when the telescopic assembly is switched to the extending state and the telescopic assembly is matched with the second supporting leg, the first supporting leg and the second supporting leg are relatively fixed; when the telescopic assembly is switched to the retraction state, the telescopic assembly is separated from the second supporting leg, and the first supporting leg and the second supporting leg can rotate relatively.
2. The leg structure of claim 1, wherein the telescopic assembly comprises a telescopic cylinder and a fixing member which are connected with each other, the telescopic cylinder is arranged on the first leg, and the fixing member is engaged with or disengaged from the second leg.
3. The leg structure of claim 2, wherein the second leg is provided with a fixing hole, and when the first leg and the second leg are unfolded and the telescopic cylinder drives the fixing member to extend, the fixing member is inserted into the fixing hole.
4. The leg structure according to claim 2, wherein the first leg comprises a first layer plate and a second layer plate which are arranged at intervals, the telescopic oil cylinder is arranged on the first layer plate, and the second layer plate is provided with a plug hole; the telescopic oil cylinder is used for driving the fixing piece to extend out, so that the fixing piece penetrates through the insertion hole.
5. The leg structure according to claim 1, wherein a stopper portion for limiting a rotation angle of the second leg with respect to the first leg is further provided on the first leg, and when the second leg is rotated to abut against the stopper portion, the first leg and the second leg are spread apart from each other.
6. The leg structure of claim 1, further comprising a drive assembly disposed between the first leg and the second leg for driving the first leg and the second leg to rotate relative to each other.
7. The leg arrangement of claim 6, wherein the drive assembly includes a swing cylinder; when the swing oil cylinder extends, the first supporting leg and the second supporting leg are mutually unfolded; when the swing oil cylinder is shortened, the first supporting leg and the second supporting leg retract mutually.
8. A crane, comprising a leg construction according to any one of claims 1-7.
9. The crane of claim 8, further comprising a frame, wherein an end of the first leg not connected to the second leg is connected to the frame.
10. The crane of claim 9 wherein said frame and said first leg are connected by at least two fasteners disposed in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911063617.7A CN110654996A (en) | 2019-11-01 | 2019-11-01 | Supporting leg structure and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911063617.7A CN110654996A (en) | 2019-11-01 | 2019-11-01 | Supporting leg structure and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110654996A true CN110654996A (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911063617.7A Pending CN110654996A (en) | 2019-11-01 | 2019-11-01 | Supporting leg structure and crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2019
- 2019-11-01 CN CN201911063617.7A patent/CN110654996A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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