Engineering machinery and supporting leg thereof

Abstract

The invention belongs to the field of engineering machinery, and particularly relates to engineering machinery and supporting legs thereof. The sliding groove frame is in sliding fit with the ball head and the sliding plate, the supporting foot disc base is fixedly and rotationally connected with the sliding groove frame through the ball socket base, and the limiting frame is used for limiting the supporting foot disc base. The ball socket base is fixedly and rotationally connected with the sliding groove frame, so that the supporting foot plate can be inclined conveniently, and the problem that the departure angle and the approach angle of a crane vehicle are greatly limited due to the fact that the supporting foot plate cannot be inclined is solved. The sliding groove frame and the ball socket base can rotate relatively, a supporting face with a large inclination angle can be stably supported, equipment cannot be damaged, the adaptability of the supporting foot disc is improved, and the service life of the supporting foot disc is prolonged. And the ball head always moves in the sliding groove, so that the situation that the ball head is separated from the slide way to cause falling of the supporting foot disc is avoided.

Description

Technical Field

[0001] The invention belongs to the field of engineering machinery, and in particular relates to an engineering machinery and a support leg thereof. Background Art

[0002] The outrigger is generally installed on the chassis of the construction machinery. It is a mechanism used to maintain the stability of the construction machinery when it is working. It is usually driven by a vertical cylinder. The ball head at the lower end of the vertical cylinder docks with the outrigger plate to support the construction machinery, reduce the pressure between the construction machinery and the ground or pad, prevent the ground from slipping, and maintain the normal operation of the construction machinery.

[0003] In order to ensure the stability of the crane during operation, the size of the outrigger plate is usually relatively large. However, the existence of the outrigger plate under the outrigger after the outrigger is retracted will affect the approach angle and departure angle of the crane, which is not conducive to the safety of the crane. The approach angle here refers to the angle between the tangent line from the protruding point at the front end of the vehicle body to the front wheel and the ground when the construction machinery is fully loaded or stationary. Figure 6 As shown, the departure angle refers to the angle between the tangent line drawn from the rear protruding point of the vehicle body 9 to the rear wheel 8 and the ground when the construction machinery is fully loaded or stationary. The larger the approach angle or departure angle, the better the passability of the construction machinery.

[0004] For traditional push-pull support legs, when the support surface of the support leg (such as the ground or sleepers) is not level during operation, the ball and socket base of the support leg will rotate to a certain extent relative to the ball head to adaptively adjust the inclined support surface. However, since the slide cannot rotate accordingly, when the assembly clearance cannot make up for the tilt angle, the vertical cylinder will interfere with the slide, causing damage to the support leg or the cylinder. Summary of the invention

[0005] In view of the above problems existing in the prior art, the present invention provides an engineering machine and an outrigger thereof, which can greatly improve the departure angle and approach angle of the vehicle.

[0006] To achieve the above object, the technical solution provided by the present invention is as follows:

[0007] In the first aspect, the present application provides a support leg of an engineering machinery, which is connected to the chassis of the engineering machinery, including a movable support leg and a ball head on the movable support leg, and also including a sliding plate, a support plate and a limit frame connected to the bottom of the chassis. The support plate includes a slide frame and a support plate base. The slide frame is slidably matched with the ball head and the sliding plate. The support plate base is fixedly rotatably connected to the slide frame via a ball socket base, and the limit frame is used to limit the support plate base.

[0008] Optionally, a notch is provided on the slide frame, and a ball socket surface matching the ball head is provided on the ball socket base, and when the movable support leg is extended to support the engineering machinery, the ball head abuts against the ball socket surface of the ball socket base.

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

[0010] Optionally, two limit rods are detachably provided on the slide frame. When the movable leg is extended to support the engineering machinery, the two limit rods are respectively arranged on both sides of the ball head; when the movable leg is retracted and the slide frame is retracted to the sliding plate, the two limit rods are arranged between the sliding plate and the ball head.

[0011] Optionally, the slide frame is provided with ear plates on both sides of the notch, the ball socket base is rotatably connected to the ear plates on both sides via a rotating shaft, and the connecting direction of the rotating shafts on both sides is the same as the sliding direction of the ball head along the slide frame.

[0012] Optionally, a through hole is formed on the ear plate, a threaded hole is formed on the ball socket base, and the rotating shaft is inserted into the through hole and threadedly connected to the threaded hole.

[0013] Optionally, the limiting frame is arranged between the wheel and the support plate of the engineering machinery, and a pressure plate is arranged on the limiting frame, and the pressure plate abuts against the upper surface of the support plate base.

[0014] Optionally, the slide frame is provided with two groups of insertion holes, and two limit rods are respectively inserted into the two groups of insertion holes. The limit rods are passed through the two side walls of the slide frame and pass out from the slide frame, and the protruding ends are fixed by a clamping block.

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

[0016] Optionally, the slide frame includes a top plate and a U-shaped plate, the top plate is connected to the U-shaped plate, a slideway is formed between the top plate and the U-shaped plate, an opening along the direction of the slideway is provided on the top plate, the ball head and the sliding plate pass through the opening and are clamped in the slideway, and the notch is provided on the U-shaped plate.

[0017] Optionally, the ball socket base is provided with arc grooves on both sides of the ball socket surface, the depth of the arc grooves is less than the depth of the ball socket surface, and the arc grooves are provided between the ball socket surface and the ear plate.

[0018] In a second aspect, the present application further provides an engineering machine, comprising a chassis and the above-mentioned outriggers of the engineering machine, wherein the outriggers of the engineering machine are arranged on the chassis.

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

[0020] The present invention can conveniently realize the tilting of the support plate by fixedly rotating the ball socket base and the slide frame, solving the problem that the support plate cannot be tilted, which greatly limits the departure angle and approach angle of the crane vehicle. In the present application, the slide frame and the ball socket base can rotate relative to each other, and can stably support the support surface with a large tilt angle without damaging the equipment, thereby improving the adaptability and service life of the support plate. The ball head always moves in the sliding groove, avoiding the situation where the ball head is separated from the slideway and causes the support plate to fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0023] Figure 2 It is a structural schematic diagram of an engineering machine in an embodiment of the present application when the legs are not retracted to the sliding plate;

[0024] Figure 3 It is a structural schematic diagram of the support plate in the embodiment of the present application;

[0025] Figure 4 It is a structural schematic diagram of the slide frame in the embodiment of the present application;

[0026] Figure 5 It is a schematic diagram of the structure of the ball and socket base in the embodiment of the present application;

[0027] Figure 6 The departure angle comparison is shown in the embodiment of the present application when the base of the support plate is not tilted and when it is tilted under the action of the limit frame;

[0028] Figure 7 This is a schematic diagram of the rotating shaft structure in an embodiment of the present application;

[0029] Description of reference numerals:

[0030] 1. Ball head; 2. Sliding plate; 3. Limiting frame; 31. Pressure plate; 4. Slide frame; 41. U-shaped plate; 411. Notch; 43. Sealing plate; 44. Handle; 45. Socket; 46. Ear plate; 47. Rotating shaft; 471. Threaded section; 472. Matching shaft; 473. Flange; 474. Groove; 5. Support plate base; 51. Reinforcement rib; 6. Ball socket base; 61. Ball socket surface; 62. Arc groove; 63. Chamfer; 64. Threaded hole; 7. Limiting rod; 71. Block; 8. Wheel; 9. Vehicle body; 10. Movable support leg. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.

[0032] Example 1

[0033] like Figure 1 As shown, a support leg of an engineering machinery is connected to the chassis of the engineering machinery, including a movable support leg 10 and a ball head 1 on the movable support leg 10, and also including a sliding plate 2, a support plate and a limit frame 3 connected to the bottom of the chassis. The support plate includes a slide frame 4 and a support plate base 5. The slide frame 4 is slidably matched with the ball head 1 and the sliding plate 2. The support plate base 5 is fixedly rotatably connected to the slide frame 4 through a ball socket base 6. The limit frame 3 is used to limit the support plate base 5. The limit frame 3 is used to control the tilt direction and angle of the support plate base 5.

[0034] When the movable support leg 10 is extended, the ball socket base 6 and the slide slot frame 4 are relatively fixed, and the support leg plate base 5 is placed on the supporting surface, and the support leg can be used to support the construction machinery; when the movable support leg 10 is retracted, the slide slot frame 4 is pushed to make the slide slot frame 4 slide onto the sliding plate 2. When the slide slot frame 4 slides to a suitable position, the ball socket base 6 is rotated to drive the support leg plate base 5 to rotate until the angle between the support leg plate base 5 and the supporting surface is equal to the angle between the tangent line drawn from the center point of the support leg plate base 5 to the wheel 8 and the supporting surface. The limit frame 3 is used to abut the support leg plate base 5 to limit the support leg 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 includes a connected round steel and a circular ring, the upper end of the round steel is welded to the chassis, and the circular ring slides along the slide frame 4; the slide frame 4 includes a top plate and a U-shaped plate 41, the top plate is connected to the U-shaped plate 41, and a slideway is formed between the top plate and the U-shaped plate 41. An opening along the slideway direction is provided on the top plate, and the circular ring of the ball head 1 and the sliding plate 2 pass through the opening and are clamped in the slideway. A notch 411 is provided at the bottom of the U-shaped plate 41, and a ball socket surface 61 matching the ball head 1 is provided on the ball socket base 6, and the ball socket base 6 is provided through the notch 411 In contact with the ball head 1, when the movable support leg 10 is extended to support the engineering machinery, the ball head 1 abuts against the ball socket surface 61 of the ball socket base 6; in the non-operating state (when the movable support leg 10 is retracted and the slide slot 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 notch 411 avoids interference between the U-shaped plate 41 and the ball socket base 6 during rotation. The design of the U-shaped plate 41 avoids scratches and interferences between the U-shaped plate 41 and the support leg base 5 during rotation.

[0037] The ball socket base 6 is provided with arc grooves 62 on both sides of the ball socket surface 61. The depth of the arc grooves 62 is less than that of the ball socket surface 61. The arc grooves 62 are provided between the ball socket surface 61 and the ear plate 46 to prevent the ball head 1 from interfering with the ball socket base 6 when sliding in the slideway and failing to realize the push-pull function of the support plate. Chamfers 63 are provided on both sides of the ball socket surface 61 of the ball socket base 6 to increase the rotation angle of the ball socket base 6 and avoid mutual interference between the ball socket base 6 and the slideway frame 4. A reinforcing rib 51 is provided on the support plate base 5 to enhance the support capacity of the legs.

[0038] The ball head 1 is clamped in the slide frame 4, and a blocking plate 43 is provided on the slide frame 4. The blocking plate 43 is arranged on the side of the slide frame 4 away from the sliding plate 2, and a handle 44 is arranged on the blocking plate 43. The handle 44 facilitates the movement of the slide frame 4, and the design of the blocking plate 43 can prevent the ball head 1 from accidentally sliding out of the slideway during the sliding process.

[0039] Two limit rods 7 are detachably provided on the slide frame 4. In this embodiment, the limit rods 7 are detachable in the following manner: two groups of insertion holes 45 (four, each group of insertion holes 45 has one on each side wall of the slide frame 4), and the two limit rods 7 are respectively inserted into the two groups of insertion holes 45. The limit rods 7 sequentially pass through the two side walls of the slide frame 4 and pass out from the slide frame 4, and the end passing out is fixed by a clamping block 71. When the movable leg 10 is extended to support the engineering machinery, the two limit rods 7 are respectively arranged on both sides of the ball head 1 and fit the ball head 1; when the movable leg 10 is retracted and the slide frame 4 is retracted to the sliding plate 2, the two limit rods 7 are both arranged between the sliding plate 2 and the ball head 1, and one of the limit rods 7 fits the ball head 1 toward the side of the sliding plate 2 to prevent the slide frame 4 from moving and sliding out of the sliding plate 2.

[0040] The slide frame 4 is provided with ear plates 46 on both sides of the notch 411, and the ball socket base 6 is rotatably connected to the ear plates 46 on both sides through a rotating shaft 47, and the connecting direction of the rotating shafts 47 on both sides is the same as the sliding direction of the ball head 1 along the slide frame 4. The rotatable connection structure between the ball socket base 6 and the ear plates 46 is specifically that a through hole is opened on the ear plate 46, and a threaded hole 64 is set on the ball socket base 6, and the rotating shaft 47 is inserted into the through hole and threadedly connected to the threaded hole 64. Figure 7 As shown, in this embodiment, the rotating shaft 47 includes a threaded section 471, a matching shaft 472 and a flange 473 which are connected in sequence. The threaded end is threadedly connected to the threaded hole 64 on the ball socket base 6. The matching shaft 472 is rotatably connected to the through hole on the ear plate 46. The flange 473 is clamped on one side of the ear plate 46. A hexagonal groove 474 is provided on the flange 473 for easy tightening. The diameter of the matching shaft 472 is larger than that of the threaded section 471, which can play a limiting role when tightening. The ball socket base 6 can be rotatably connected to the ear plate 46 by rotating the flange 473.

[0041] The limit frame 3 is arranged between the wheel 8 and the foot pan of the engineering machinery, and a pressure plate 31 is provided at the bottom of the limit frame 3. The inclination angle of the pressure plate 31 is the inclination angle of the controlled foot pan base 5. The pressure plate 31 abuts against the upper surface of the foot pan base 5, thereby controlling the inclination direction and angle of the foot pan base 5. When the movable leg 10 is retracted, the foot pan can be pushed to the inside of the frame and fixed on the sliding plate 2. The foot pan base 5 is fixed and supported by the sliding plate 2, the ball head 1 and the limit frame 3; the foot pan base 5 can rotate, and when the slide frame 4 is retracted to the sliding plate 2, the foot pan base 5 maintains an inclined state (β), which can significantly improve the departure angle compared to the traditional horizontal state (α), such as Figure 6 shown.

[0042] like Figure 2 As shown, when the legs are retracted but not yet retracted to the position of the sliding plate 2, the foot plate remains horizontal under the action of gravity. At this time, the foot plate base 5 is hung directly below the ball head 1 through the slideway, and the limit rods 7 on both sides limit the ball head 1. The foot plate base 5 can rotate around the axis of the cylinder ball head without interfering with the limit frame 3 and the sliding frame during the process. Then remove the limit rod 7 on the side close to the handle 44, push the slide frame 4 toward the sliding frame, and at the same time flip the foot plate base 5 to tilt it so that the foot plate base 5 is located below the limit frame 3. Continue to push the sliding groove until the sliding plate 2 slides to the appropriate position of the slideway, and then insert the limit rod 7 into the limit hole. At this time, the limit rod 7 is on the side of the ball head 1 facing the sliding plate 2. At this time, the state is as follows Figure 1 shown.

[0043] This embodiment further provides an engineering machine, comprising a chassis and the above-mentioned outriggers of the engineering machine, wherein the outriggers of the engineering machine are arranged on the chassis.

[0044] The outrigger structure of the engineering machinery of the present invention is compact and has good stability, and the inclination of the outrigger plate can be easily realized, thereby improving the adaptability and service life of the outrigger plate.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0046] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A support leg of an engineering machine, the support leg being connected to the chassis of the engineering machine, comprising a movable support leg and a ball head on the movable support leg, characterized in that: It also includes a sliding plate, a foot plate and a limit frame connected to the bottom of the chassis, the foot plate includes a slide frame and a foot plate base, the slide frame is slidably matched with the ball head and the sliding plate, the foot plate base is fixedly rotatably connected to the slide frame through a ball socket base, and the limit frame is used to limit the foot plate base.

2. The outrigger of the engineering machinery according to claim 1, characterized in that: The slide frame is provided with a notch, and the ball socket base is provided with a ball socket surface matching the ball head. When the movable support leg is extended to support the engineering machinery, the ball head abuts against the ball socket surface of the ball socket base.

3. The outrigger of engineering machinery according to claim 1, characterized in that: The ball head is clamped in the slide slot frame, and a blocking plate is arranged on the slide slot frame. The blocking plate is arranged on a side of the slide slot frame away from the sliding plate.

4. The outrigger of engineering machinery according to claim 1, characterized in that: Two limit rods are detachably provided on the slide frame. When the movable legs are extended to support the engineering machinery, the two limit rods are respectively arranged on both sides of the ball head; when the movable legs are retracted and the slide frame is retracted to the sliding plate, the two limit rods are arranged between the sliding plate and the ball head.

5. The outrigger of engineering machinery according to claim 1, characterized in that: The slide frame is provided with ear plates on both sides of the notch, and the ball socket base is rotatably connected with the ear plates on both sides through a rotating shaft, and the connecting direction of the rotating shafts on both sides is the same as the sliding direction of the ball head along the slide frame.

6. The outrigger of the engineering machinery according to claim 5, characterized in that: The ear plate is provided with a through hole, the ball socket base is provided with a threaded hole, the rotating shaft is inserted into the through hole and is threadedly connected with the threaded hole.

7. The outrigger of engineering machinery according to claim 1, characterized in that: The limiting frame is arranged between the wheel and the supporting foot plate of the engineering machinery, and a pressure plate is arranged on the limiting frame, and the pressure plate abuts against the upper surface of the supporting foot plate base.

8. The outrigger of engineering machinery according to claim 4, characterized in that: The slide frame is provided with two groups of insertion holes, and two limit rods are respectively inserted into the two groups of insertion holes. The limit rods are penetrated on the two side walls of the slide frame and pass out from the slide frame, and one end of the pass out is fixed by a clamping block.

9. The outrigger of engineering machinery according to claim 1, characterized in that: The ball socket base is provided with arc grooves on both sides of the ball socket surface, the depth of the arc grooves is less than the depth of the ball socket surface, and the arc grooves are arranged between the ball socket surface and the ear plate.

10. An engineering machine, characterized in that: The invention comprises a chassis and the outrigger of the engineering machinery according to any one of claims 1 to 9, wherein the outrigger of the engineering machinery is arranged on the chassis.

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