An engineering machine and a support leg thereof

Abstract

The present application belongs to the field of engineering machinery, and particularly relates to an engineering machinery and a support leg thereof. The sliding groove frame is in sliding fit with the ball head and the sliding plate, the support foot disc base is fixedly rotatably connected with the sliding groove frame through the ball socket base, and the limiting frame is used for limiting the support foot disc base. The fixedly rotatable connection of the ball socket base and the sliding groove frame can conveniently realize the inclination of the support foot disc, and solves the problem that the inclination of the support foot disc cannot be realized, which greatly limits the departure angle and the approach angle of the crane vehicle. In the present application, the sliding groove frame and the ball socket base can relatively rotate, the support surface with a large inclination angle can also be stably supported without damaging the equipment, and the adaptability and service life of the support foot disc are improved. The ball head always moves in the sliding groove, and the situation that the ball head is separated from the sliding groove to cause the support foot disc to fall is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of engineering machinery, and particularly relates to an engineering machinery and a support leg thereof. BACKGROUND

[0002] The support leg is generally installed on the chassis of the engineering machinery and is a mechanism for maintaining the stability of the engineering machinery during work. The support leg is usually driven by a vertical oil cylinder. The ball head at the lower end of the vertical oil cylinder is connected to the support leg plate, thereby supporting the engineering machinery, reducing the pressure between the engineering machinery and the ground or the cushion plate, preventing the ground from sliding, and maintaining the normal work of the engineering machinery.

[0003] In order to ensure the stability of the crane during work, the size of the support leg plate is usually large. However, the existence of the support leg plate below the movable support leg after the movable support leg is retracted will affect the approach angle and the departure angle of the crane, which is not conducive to the work safety of the crane. The approach angle refers to the angle between the tangent line drawn from the protruding point at the front end of the vehicle body to the front wheel and the ground when the engineering machinery is fully loaded or stationary, as shown in FIG. 1. The departure angle refers to the angle between the tangent line drawn from the protruding point at the rear end of the vehicle body to the rear wheel and the ground when the engineering machinery is fully loaded or stationary. The larger the approach angle or the departure angle, the better the passability of the engineering machinery. Figure 6

[0004] In the conventional push-pull type support leg plate, when the support surface (such as the ground or the sleeper) is not horizontal during work, the ball socket base of the support leg plate will rotate relative to the ball head to a certain extent to adapt to the inclined support surface. However, since the slide cannot follow the rotation, when the assembly gap cannot compensate for the inclination angle, the vertical oil cylinder will interfere with the slide, thereby causing damage to the support leg plate or the oil cylinder. SUMMARY

[0005] In view of the above problems in the prior art, the present application provides an engineering machinery and a support leg thereof, which can greatly improve the approach angle and the departure angle of the vehicle.

[0006] To achieve the above-mentioned purpose, the technical scheme provided by the present application is as follows:

[0007] In a first aspect, the present application provides a support leg of an engineering machinery, which is connected to the chassis of the engineering machinery and comprises a movable support leg and a ball head on the movable support leg, and further comprises a sliding plate connected to the bottom of the chassis, a support leg plate, and a limiting frame. The support leg plate comprises a sliding groove frame and a support leg plate base. The sliding groove frame is in sliding cooperation with the ball head and the sliding plate. The support leg plate base is in fixedly rotatable connection with the sliding groove frame through a ball socket base. The limiting frame is used for limiting the support leg plate base.

[0008] ​Optionally, the chute frame is provided with an opening, and the ball socket base is provided with a ball socket surface matched with the ball head.

[0009] Optionally, the ball head is clamped in the chute frame, and the chute frame is provided with a blocking plate arranged on a side of the chute frame away from the sliding plate.

[0010] Optionally, the chute frame is detachably provided with two limiting rods, and the two limiting rods are arranged on two sides of the ball head when the movable support leg is extended to support the engineering machinery.

[0011] Optionally, the chute frame is provided with an ear plate on two sides of the opening, and the ball socket base is rotatably connected to the two ear plates through two shafts.

[0012] Optionally, the ear plate is provided with a through hole, and the ball socket base is provided with a threaded hole, and the shaft is inserted into the through hole and threadedly connected with the threaded hole.

[0013] Optionally, the limiting frame is arranged between the wheel of the engineering machinery and the support disc, and the limiting frame is provided with a pressing plate abutting against the upper surface of the support disc base.

[0014] Optionally, the chute frame is provided with two groups of insertion holes, and the two limiting rods are respectively inserted into the two groups of insertion holes.

[0015] Optionally, the blocking plate is provided with a handle.

[0016] Optionally, the chute frame comprises a top plate and a U-shaped plate, the top plate is connected with the U-shaped plate, a chute is formed between the top plate and the U-shaped plate, the top plate is provided with an opening in the direction of the chute, the ball head and the sliding plate pass through the opening and are clamped in the chute, and the opening is arranged on the U-shaped plate.

[0017] Optionally, the ball socket base is provided with a circular arc groove on two sides of the ball socket surface, the depth of the circular arc groove is less than the depth of the ball socket surface, and the circular arc groove is arranged between the ball socket surface and the ear plate.

[0018] In a second aspect, the application further provides an engineering machinery comprising a chassis and the engineering machinery support leg.

[0019] Compared with the prior art, the application has at least the following beneficial effects:

[0020] The application can realize the inclination of the support foot disc conveniently by the rotatable connection between the ball socket base and the sliding groove frame, and solves the problem that the support foot disc cannot be inclined, which greatly limits the departure angle and approach angle of the crane vehicle. In the application, the sliding groove frame and the ball socket base can rotate relative to each other, and the support surface with a large inclination angle can also be stably supported without damaging the equipment, thereby improving the adaptability and service life of the support foot disc. The ball head always moves in the sliding groove, avoiding the situation that the ball head is separated from the sliding groove and the support foot disc falls. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0022] Figure 1 FIG. 1 is a structural schematic diagram of a support leg of an engineering machine in an embodiment of the present application;

[0023] Figure 2 FIG. 2 is a structural schematic diagram of a support leg of an engineering machine in an embodiment of the present application, which is not retracted to the sliding plate;

[0024] Figure 3 FIG. 3 is a structural schematic diagram of a support foot disc in an embodiment of the present application;

[0025] Figure 4 FIG. 4 is a structural schematic diagram of a sliding groove frame in an embodiment of the present application;

[0026] Figure 5 FIG. 5 is a structural schematic diagram of a ball socket base in an embodiment of the present application;

[0027] Figure 6 FIG. 6 is a comparison of departure angles when the support foot disc base is not inclined and is inclined under the action of the limiting frame in an embodiment of the present application;

[0028] Figure 7 FIG. 7 is a structural schematic diagram of a rotating shaft in an embodiment of the present application;

[0029] Explanation of reference signs:

[0030] 1. Ball head; 2. Sliding plate; 3. Limiting bracket; 31. Pressure plate; 4. Slide bracket; 41. U-shaped plate; 411. Notch; 43. Sealing plate; 44. Handle; 45. Insertion hole; 46. Ear plate; 47. Shaft; 471. Threaded section; 472. Mating shaft; 473. Flange; 474. Groove; 5. Support plate base; 51. Reinforcing rib; 6. Ball socket base; 61. Ball socket surface; 62. Arc groove; 63. Chamfer; 64. Threaded hole; 7. Limiting rod; 71. Locking block; 8. Wheel; 9. Body; 10. Movable support leg. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0032] Example 1

[0033] like Figure 1 As shown, an outrigger for construction machinery is connected to the chassis of the construction machinery. It includes a movable outrigger 10 and a ball joint 1 on the movable outrigger 10. It also includes a sliding plate 2, a foot plate, and a limiting frame 3 connected to the bottom of the chassis. The foot plate includes a sliding groove frame 4 and a foot plate base 5. The sliding groove frame 4 is slidably engaged with both the ball joint 1 and the sliding plate 2. The foot plate base 5 is fixedly and rotatably connected to the sliding groove frame 4 through a ball socket base 6. The limiting frame 3 is used to limit the foot plate base 5 and to control the tilt direction and angle of the foot plate base 5.

[0034] When the movable outrigger 10 extends, the ball socket base 6 and the slide frame 4 are fixed relative to each other. The outrigger plate base 5 can be placed on the support surface to support the construction machinery. When the movable outrigger 10 retracts, the slide frame 4 is pushed to slide onto the sliding plate 2. When the slide frame 4 slides to the appropriate position, the ball socket base 6 is rotated to drive the outrigger plate base 5 to rotate until the angle between the outrigger plate base 5 and the support surface is equal to the angle between the tangent line drawn from the center point of the outrigger plate base 5 to the wheel 8 and the support surface. The limiting bracket 3 is used to abut against the outrigger plate base 5 to limit the outrigger plate base 5.

[0035] Example 2

[0036] The difference between this embodiment and Embodiment 1 is that: Figure 3 , Figure 4 and Figure 5As shown, the sliding plate 2 comprises a connected round steel and a circular ring, the upper end of the round steel is welded on the chassis, and the circular ring slides along the sliding groove frame 4; the sliding groove frame 4 comprises a top plate and a U-shaped plate 41, the top plate is connected with the U-shaped plate 41, and a sliding channel is formed between the top plate and the U-shaped plate 41; the top plate is provided with an opening in the direction of the sliding channel, the ball head 1 and the circular ring of the sliding plate 2 pass through the opening and are clamped in the sliding channel, the U-shaped plate 41 is provided with an opening 411 at the bottom, the ball socket base 6 is provided with a ball socket surface 61 matched with the ball head 1, the ball socket base 6 is in contact with the ball head 1 through the opening 411, and the ball head 1 is in abutment with the ball socket surface 61 of the ball socket base 6 when the movable supporting leg 10 is extended to support the engineering machinery; when the non-working state (the movable supporting leg 10 is retracted, and the sliding groove frame 4 is retracted to the sliding plate 2), there is a gap between the ball head 1 and the ball socket surface 61, the design of the opening 411 avoids the interference between the U-shaped plate 41 and the ball socket base 6 during rotation, and the design of the U-shaped plate 41 avoids the scratching and interference between the U-shaped plate 41 and the supporting leg base 5 during rotation.

[0037] The ball socket base 6 is provided with a circular arc groove 62 on both sides of the ball socket surface 61, the depth of the circular arc groove 62 is less than that of the ball socket surface 61, the circular arc groove 62 is arranged between the ball socket surface 61 and the lug plate 46, and is used for avoiding the interference between the ball head 1 and the ball socket base 6 during sliding in the sliding channel, so that the pushing and pulling functions of the supporting leg base cannot be realized. The ball socket base 6 is provided with a chamfer 63 on both sides of the ball socket surface 61, so that the rotation angle of the ball socket base 6 is increased, and the mutual interference between the ball socket base 6 and the sliding groove frame 4 is avoided. The supporting leg base 5 is provided with a reinforcing rib 51, which is used for enhancing the supporting capacity of the supporting leg.

[0038] The ball head 1 is clamped in the sliding groove frame 4, the sliding groove frame 4 is provided with a blocking plate 43, the blocking plate 43 is arranged on the side of the sliding groove frame 4 away from the sliding plate 2, and the blocking plate 43 is provided with a handle 44.

[0039] The sliding groove frame 4 is detachably provided with two limiting rods 7, in the embodiment, the detachable mode of the limiting rod 7 is that the sliding groove frame 4 is provided with two groups of insertion holes 45 (four in total, one insertion hole 45 is arranged on each side wall of the sliding groove frame 4 in each group), the two limiting rods 7 are respectively inserted into the two groups of insertion holes 45, the limiting rods 7 pass through the two side walls of the sliding groove frame 4 in sequence and are out of the sliding groove frame 4, and one end out of the sliding groove frame 4 is fixed through a clamping block 71. When the movable supporting leg 10 is extended to support the engineering machinery, the two limiting rods 7 are arranged on both sides of the ball head 1 and are in close contact with the ball head 1; when the movable supporting leg 10 is retracted and the sliding groove frame 4 is retracted to the sliding plate 2, the two limiting rods 7 are arranged between the sliding plate 2 and the ball head 1, one of the limiting rods 7 is in close contact with one side of the ball head 1 facing the sliding plate 2, the sliding groove frame 4 is prevented from moving, and the sliding groove frame 4 is prevented from sliding out of the sliding plate 2.

[0040] The sliding groove frame 4 is provided with an ear plate 46 on both sides of the gap 411, and the ball socket base 6 is rotationally connected to the two ear plates 46 through the rotating shaft 47. The connecting direction of the two rotating shafts 47 is the same as the sliding direction of the ball head 1 along the sliding groove frame 4. The rotating connection structure of the ball socket base 6 and the ear plate 46 is that a through hole is formed in the ear plate 46, a threaded hole 64 is formed in the ball socket base 6, the rotating shaft 47 is inserted into the through hole and is threadedly connected with the threaded hole 64. As shown in Figure 7 the embodiment, the rotating shaft 47 includes a threaded section 471, a matching shaft 472 and a flange plate 473 connected in sequence, the threaded end is threadedly connected with the threaded hole 64 in the ball socket base 6, the matching shaft 472 is rotationally connected with the through hole in the ear plate 46, the flange plate 473 is clamped on one side of the ear plate 46, a hexagonal recess 474 is formed in the flange plate 473 to facilitate tightening, the diameter of the matching shaft 472 is greater than that of the threaded section 471, and the matching shaft 472 can play a limiting role when being tightened. The ball socket base 6 is rotationally connected to the ear plate 46 by rotating the flange plate 473.

[0041] The limiting frame 3 is arranged between the wheel 8 and the support plate of the engineering machinery, and the limiting frame 3 is provided with a pressing plate 31 at the bottom. The inclination angle of the pressing plate 31 is the inclination angle of the support plate base 5 to be controlled. The pressing plate 31 is in abutment with the upper surface of the support plate base 5, so as to control the inclination direction and angle of the support plate base 5. When the movable support leg 10 is retracted, the support plate can be pushed to the inner side of the frame and fixed on the sliding plate 2, and the support plate base 5 is fixed and supported by the sliding plate 2, the ball head 1 and the limiting frame 3 together. The support plate base 5 can rotate, and when the sliding groove frame 4 is retracted to the sliding plate 2, the support plate base 5 remains in an inclined state (β), which can significantly improve the departure angle compared with the conventional horizontal state (α), as shown in Figure 6 .

[0042] As shown in Figure 2 , when the support leg is retracted and has not been retracted to the position of the sliding plate 2, the support plate remains in a horizontal state under the action of gravity. At this time, the support plate base 5 is hung below the ball head 1 through the slide, and the ball head 1 is limited by the limiting rods 7 on both sides. The support plate base 5 can rotate around the ball head axis of the oil cylinder, and does not interfere with the limiting frame 3 and the sliding frame in the process. Then the limiting rod 7 close to the handle 44 is removed, the sliding groove frame 4 is pushed to the sliding frame direction, and the support plate base 5 is tilted to make the support plate base 5 located below the limiting frame 3. Continue to push the sliding groove, and the sliding plate 2 is slid to the appropriate position of the slide. Then the limiting rod 7 is inserted into the limiting hole, and at this time the limiting rod 7 is on the side of the ball head 1 facing the sliding plate 2. At this time, the state is as shown in Figure 1 .

[0043] The embodiment also provides an engineering machinery, which comprises a chassis and the engineering machinery support leg described above. The engineering machinery support leg is arranged on the chassis.

[0044] The outrigger structure of the engineering machine is compact, stable, can conveniently realize the tilting of the outrigger disc, and improves the adaptability and service life of the outrigger disc.

[0045] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. An outrigger for a construction machine, the outrigger being connected to a chassis of the construction machine and comprising a movable outrigger and a ball head on the movable outrigger, characterized in that The sliding plate, the foot disc and the limiting frame are connected to the bottom of the chassis, the foot disc comprises a sliding groove frame and a foot disc base, the sliding groove frame is in sliding fit with the ball head and the sliding plate, the foot disc base is fixedly connected with the sliding groove frame through a ball socket base, and the limiting frame is used for limiting the foot disc base; The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery. The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery. The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery.

2. The support leg of a working machine according to claim 1, characterized in that The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery.

3. The support leg of a working machine according to claim 1, characterized in that, The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery.

4. The support leg of a working machine according to claim 1, characterized in that, The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery.

5. The support leg of a working machine according to claim 3, characterized in that, The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery.

6. The support leg of a working machine according to claim 1, characterized in that, The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery.

7. A working machine, characterized in that The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery. The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery. The sliding groove frame is provided with an opening, the ball socket base is provided with a ball socket surface matched with the ball head, and the ball head is in abutment with the ball socket surface of the ball socket base when the movable supporting leg is extended to support the engineering machinery.

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