Supporting leg device and concrete pump truck

Abstract

The utility model belongs to the technical field of concrete pump trucks, and discloses a landing leg device and a concrete pump truck, the landing leg device is installed on a bottom frame, the landing leg device comprises a telescopic driving piece and at least two landing leg structures which are sequentially arranged, the landing leg structure farthest from the bottom frame is a tail end landing leg, and the landing leg structure farthest from the bottom frame is a front end landing leg. The front-end supporting leg and the tail-end supporting leg are rotationally connected around a first vertical line, the fixed end of the telescopic driving part is rotationally connected to one of the front-end supporting leg and the tail-end supporting leg, and the output end of the telescopic driving part is rotationally connected to the other one of the front-end supporting leg and the tail-end supporting leg; the telescopic driving piece is used for driving the tail end supporting leg and the front end supporting leg to relatively rotate around a first vertical line. The front-end supporting leg and the tail-end supporting leg are rotationally connected, and the telescopic driving piece is used for driving the tail-end supporting leg to rotate relative to the front-end supporting leg, so that the tail-end supporting leg can avoid obstacles.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete pump trucks, in particular to a leg device and a concrete pump truck. Background Art

[0002] There are three types of outrigger structures for concrete pump trucks. The first type is the X-type outrigger, the second type is the rear-swing outrigger, and the third type is the front-swing outrigger. The front-swing outrigger and the rear-swing outrigger have limitations. The current mainstream application product is the X-type outrigger, which includes multiple retractable leg sections. Its characteristic is that it can be retracted in a linear manner and can achieve single-sided support after unfolding.

[0003] However, in some application scenarios, such as when there are obstacles on the site, the X-shaped legs can only be extended and retracted in a straight line. When there is an obstacle in the extension direction, the extension length of the X-shaped legs is limited, causing the legs to be unable to be fully extended in this area, thus affecting the construction of the concrete pump truck. Utility Model Content

[0004] The utility model aims to provide a leg device and a concrete pump truck, wherein the front leg is rotatably connected to the rear leg, and a telescopic driving member is used to drive the rear leg to rotate relative to the front leg, so that the rear leg can avoid obstacles.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, a leg device is provided for being installed on a base frame, the leg device comprising a telescopic drive member and at least two leg structures arranged in sequence, the leg structure farthest from the base frame is the end leg, the leg structure second farthest from the base frame is the front leg, the front leg is rotatably connected to the end leg around a first vertical line, the fixed end of the telescopic drive member is rotatably connected to one of the front leg and the end leg, the output end of the telescopic drive member is rotatably connected to the other of the front leg and the end leg, and the telescopic drive member is used to drive the end leg and the front leg to rotate relative to each other around the first vertical line.

[0007] As an optional technical solution, the leg device includes at least three leg structures arranged in sequence. Except for the end leg and the front leg, the remaining leg structures are telescopic legs. The front leg is slidably connected to the adjacent telescopic leg in a horizontal direction toward or away from the base frame.

[0008] As an optional technical solution, the central axis of the telescopic driving member is located in a horizontal plane, and the central axis of the telescopic driving member does not intersect with the first vertical line.

[0009] As an optional technical solution, the fixed end and the output end of the telescopic driving member are both located on the same side of the connection point between the front leg and the end leg;

[0010] Alternatively, the fixed end and the output end of the telescopic driving member are respectively located on both sides of the connection point between the front supporting leg and the end supporting leg.

[0011] As an optional technical solution, a limiting member is further provided between the front end leg and the terminal leg, one end of the limiting member is connected to one of the front end leg and the terminal leg, and the other end of the limiting member selectively abuts against the other of the front end leg and the terminal leg.

[0012] As an optional technical solution, when the other end of the limiting member abuts against the other of the front leg and the terminal leg, the front leg and the terminal leg are in a straight state.

[0013] As an optional technical solution, a pad block is further provided between the front end leg and the terminal leg, the limiting member is arranged at one of the front end leg and the terminal leg, the pad block is arranged at the other of the front end leg and the terminal leg, and the limiting member selectively abuts against the pad block.

[0014] As an optional technical solution, the leg structure connected to the limiting member is provided with an internal thread, the limiting member is provided with an external thread, and the limiting member is threadedly connected to the leg structure.

[0015] As an optional technical solution, two groups of support assemblies are provided between the front support leg and the terminal support leg, and the two groups of support assemblies are arranged at intervals in the vertical direction, and the support assemblies include a first support ear, a pin shaft and two second support ears, the first support ear is fixedly connected to one of the front support leg and the terminal support leg, and the second support ear is fixedly connected to the other of the front support leg and the terminal support leg;

[0016] In the same group of the support components, the two second support ears are respectively located on the upper and lower sides of the first support ear, the pin shaft passes through the first support ear and the two second support ears, and the first support ear and the second support ear rotate with the central axis of the pin shaft as the center line.

[0017] In a second aspect, a concrete pump truck is provided. The concrete pump truck comprises a base frame and the above-mentioned outrigger device, wherein the outrigger device is mounted on the base frame.

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a leg device and a concrete pump truck. The concrete pump truck comprises a leg device, and the leg device comprises at least two leg structures arranged in sequence, wherein the leg structure farthest from the base frame is the end leg, and the leg structure second farthest from the base frame is the front leg. The front leg and the end leg are rotatably connected around a first vertical line, and a telescopic driving member is arranged between the front leg and the end leg, so that the fixed end of the telescopic driving member is rotatably connected to one of the front leg and the end leg, and the output end of the telescopic driving member is rotatably connected to the other of the front leg and the end leg. When there is an obstacle at the site where the concrete pump truck is located, the telescopic driving member can be used to drive the end leg to rotate relative to the front leg, so that the end leg can fall on the ground without obstacles, so as to ensure that the concrete pump truck can work stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below according to the accompanying drawings and embodiments;

[0021] Figure 1 It is a structural schematic diagram of the leg device (when the end leg is in a swaying state) and the base frame described in the embodiment;

[0022] Figure 2 It is a structural schematic diagram of the leg device (when the end legs are in a straightened state) and the base frame according to the embodiment;

[0023] Figure 3 It is a structural schematic diagram of the leg device described in the embodiment;

[0024] Figure 4 It is an exploded view of the outrigger device described in the embodiment.

[0025] In the figure:

[0026] 100, bottom frame; 200, first vertical line;

[0027] 1. End outrigger;

[0028] 2. Front outrigger;

[0029] 3. Telescopic drive parts;

[0030] 4. Telescopic legs;

[0031] 5. Limiting parts;

[0032] 6. Pads;

[0033] 71. First supporting ear; 72. Pin; 73. Second supporting ear. DETAILED DESCRIPTION

[0034] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0039] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0040] This embodiment provides a concrete pump truck. The concrete pump truck includes a base frame 100 and a leg device. The leg device is installed on the base frame 100.

[0041] like Figures 1 to 4 As shown, this embodiment provides a leg device for installation on a base frame 100, the leg device includes a telescopic drive member 3 and at least two leg structures arranged in sequence, the leg structure farthest from the base frame 100 is the end leg 1, the leg structure second farthest from the base frame 100 is the front leg 2, the front leg 2 is rotatably connected to the end leg 1 around a first vertical line 200, the fixed end of the telescopic drive member 3 is rotatably connected to one of the front leg 2 and the end leg 1, the output end of the telescopic drive member 3 is rotatably connected to the other of the front leg 2 and the end leg 1, and the telescopic drive member 3 is used to drive the end leg 1 and the front leg 2 to rotate relative to each other around the first vertical line 200.

[0042] Specifically, when the concrete pump body is traveling on the construction site and moves to a preset working position, if there is an obstacle such as a stone just below the end leg 1 of the concrete pump body, the telescopic drive member 3 can be used to drive the end leg 1 to rotate relative to the front leg 2, and the end leg 1 rotates to a position where there is no obstacle, and then the leg device falls.

[0043] In this embodiment, the telescopic driving member 3 is an oil cylinder. In some other embodiments, the telescopic driving member 3 is a pneumatic cylinder or an electric cylinder.

[0044] In the present embodiment, the fixed end of the telescopic driving member 3 is rotatably connected to the end of the front leg 2, and the output end of the telescopic driving member 3 is rotatably connected to the end of the terminal leg 1. The telescopic driving member 3 is located in the gap between the front leg 2 and the terminal leg 1, and can isolate and protect the telescopic driving member 3. In the present embodiment, two groups of support components are provided between the front leg 2 and the terminal leg 1, one group of support components is located above the telescopic driving member 3, and the other group of support components is located below the telescopic driving member 3. The two groups of support components isolate and protect the telescopic driving member 3.

[0045] In some other embodiments, the fixed end of the telescopic driving member 3 is rotatably connected to the side of the front leg 2 , and the output end of the telescopic driving member 3 is rotatably connected to the side of the terminal leg 1 .

[0046] In this embodiment, the fixed end of the telescopic driving member 3 is rotatably connected to the front leg 2, and the output end of the telescopic driving member 3 is rotatably connected to the terminal leg 1. When the output end of the telescopic driving member 3 is extended or retracted, relative rotation occurs between the fixed end of the telescopic driving member 3 and the front leg 2, between the output end of the telescopic driving member 3 and the terminal leg 1, and between the front leg 2 and the terminal leg 1; the rotation angle of the terminal leg 1 relative to the front leg 2 can be controlled by controlling the stroke of the output end of the telescopic driving member 3.

[0047] In some other embodiments, the fixed end of the telescopic driving member 3 is rotatably connected to the end leg 1 , and the output end of the telescopic driving member 3 is rotatably connected to the front leg 2 .

[0048] Optionally, the leg device includes at least three leg structures arranged in sequence, and except for the end leg 1 and the front leg 2, the remaining leg structures are telescopic legs 4, and the front leg 2 is slidably connected to the adjacent telescopic legs 4 along the horizontal direction toward or away from the base frame 100.

[0049] The leg structure is set to two sections, three sections, or four sections, or even more. When the leg structure is set to two sections, the front leg 2 is connected to the base frame 100. When the leg structure is set to three sections, one end of the telescopic leg 4 is connected to the base frame 100, and the other end of the telescopic leg 4 is connected to the front leg 2. When the leg structure is set to four sections, one section of the telescopic leg 4 is connected to the base frame 100, and the other section of the telescopic leg 4 is connected to the front leg 2. Two adjacent telescopic legs 4 are connected by sliding in the horizontal direction, and the front leg 2 is connected to the adjacent telescopic leg 4 by sliding in the horizontal direction.

[0050] In this embodiment, the leg device includes four leg structures arranged in sequence.

[0051] Optionally, the central axis of the telescopic driving member 3 is located in a horizontal plane, and the central axis of the telescopic driving member 3 does not intersect with the first vertical line 200 .

[0052] In this embodiment, the central axis of the telescopic driving member 3 is set in a horizontal plane, so that the central axis of the telescopic driving member 3 is perpendicular to the first vertical line 200, and the telescopic driving member 3 does not apply any force to the terminal leg 1 in the vertical direction, so as to avoid the terminal leg 1 having a tendency to separate from the front leg 2 in the vertical direction; the extension direction of the central axis of the telescopic driving member 3 changes with the extension and retraction of the telescopic driving member 3, so that the central axis of the telescopic driving member 3 does not intersect with the first vertical line 200, and the telescopic driving member 3 is offset to one side of the first vertical line 200 to prevent the occurrence of a dead point of movement. Otherwise, when the central axis of the telescopic driving member 3, the connection point between the front leg 2 and the terminal leg 1, and the connection point between the telescopic driving member 3 and the terminal leg 1 are collinear, the terminal leg 1 falls into the dead point of movement, and at this time, an external force is required to make the terminal leg 1 pass the dead point of movement.

[0053] In some embodiments, the fixed end and the output end of the telescopic drive member 3 are both located on the same side of the connection point between the front leg 2 and the terminal leg 1. For example, the fixed end and the output end of the telescopic drive member 3 are both located on the left side of the connection point between the front leg 2 and the terminal leg 1, and when the output end of the telescopic drive member 3 is extended, the terminal leg 1 swings to the right, and when the output end of the telescopic drive member 3 is contracted, the terminal leg 1 swings to the left; similarly, the fixed end and the output end of the telescopic drive member 3 are both located on the right side of the connection point between the front leg 2 and the terminal leg 1, and when the output end of the telescopic drive member 3 is extended, the terminal leg 1 swings to the left, and when the output end of the telescopic drive member 3 is contracted, the terminal leg 1 swings to the right.

[0054] In this embodiment, the fixed end and the output end of the telescopic driving member 3 are respectively located on both sides of the connection point between the front leg 2 and the terminal leg 1. For example, the fixed end of the telescopic driving member 3 is located on the left side of the connection point between the front leg 2 and the terminal leg 1, and the output end of the telescopic driving member 3 is located on the right side of the connection point between the front leg 2 and the terminal leg 1. When the output end of the telescopic driving member 3 is extended, the terminal leg 1 swings to the left, and when the output end of the telescopic driving member 3 is retracted, the terminal leg 1 swings to the right.

[0055] Optionally, a limit member 5 is further provided between the front leg 2 and the terminal leg 1, one end of the limit member 5 is connected to one of the front leg 2 and the terminal leg 1, and the other end of the limit member 5 selectively abuts against the other of the front leg 2 and the terminal leg 1.

[0056] In this embodiment, the limiting member 5 is installed on the front leg 2, and the telescopic driving member 3 drives the end leg 1 to rotate. When the end leg 1 abuts against the other end of the limiting member 5, the end leg 1 stops rotating, and the front leg 2 and the end leg 1 are in a straight state to avoid the problem of dimensional deviation causing the legs to not be fully extended and affect the normal use of the concrete pump truck.

[0057] In some other embodiments, the limiting member 5 is installed on the end leg 1 .

[0058] In this embodiment, the limiting member 5 is a bolt.

[0059] In this embodiment, the central axis of the limiting member 5 is arranged on a horizontal plane.

[0060] Optionally, a cushion block 6 is further provided between the front leg 2 and the end leg 1, the limiting member 5 is arranged at one of the front leg 2 and the end leg 1, the cushion block 6 is arranged at the other of the front leg 2 and the end leg 1, and the limiting member 5 selectively abuts against the cushion block 6.

[0061] When the limiting member 5 is set at the front leg 2, the cushion block 6 is set at the end leg 1; when the limiting member 5 is set at the end leg 1, the cushion block 6 is set at the front leg 2; this embodiment utilizes the cushion block 6 as a consumable part. When the cushion block 6 is damaged and scrapped due to the impact of the limiting member 5, it is only necessary to replace the cushion block 6, thereby reducing the cost.

[0062] Optionally, the leg structure connected to the limiting member 5 is provided with an internal thread, the limiting member 5 is provided with an external thread, and the limiting member 5 is threadedly connected to the leg structure.

[0063] In this embodiment, the front end leg 2 is provided with an internal thread, and the depth of the limit member 5 inserted into the front end leg 2 is adjustable, thereby controlling the angle between the end leg 1 and the front end leg 2 when the end leg 1 abuts against the limit member 5. For example, when the overall length of the limit member 5 remains unchanged, when the depth of the limit member 5 inserted into the front end leg 2 is a first preset value, after the end leg 1 abuts against the limit member 5, the front end leg 2 and the end leg 1 are in a straight state, and the end leg 1 can only swing to one side. When the depth of the limit member 5 inserted into the front end leg 2 is a second preset value and the second preset value is greater than the first preset value, the swing angle amplitude of the end leg 1 increases, and the end leg 1 can swing to both sides. When the depth of the limit member 5 inserted into the front end leg 2 is a third preset value and the third preset value is less than the first preset value, the end leg 1 can only swing on one side and the swing angle amplitude is reduced.

[0064] Optionally, two groups of support components are provided between the front end leg 2 and the terminal leg 1, and the two groups of support components are spaced apart in the vertical direction. The support components include a first support ear 71, a pin shaft 72 and two second support ears 73. The first support ear 71 is fixedly connected to one of the front end leg 2 and the terminal leg 1, and the second support ear 73 is fixedly connected to the other of the front end leg 2 and the terminal leg 1.

[0065] In the same group of support components, the two second support ears 73 are respectively located on the upper and lower sides of the first support ear 71, and the pin 72 passes through the first support ear 71 and the two second support ears 73. The first support ear 71 and the second support ear 73 rotate with the central axis of the pin 72 as the center line.

[0066] In this embodiment, the first supporting ear 71 is fixedly disposed on the end supporting leg 1 , and the second supporting ear 73 is fixedly disposed on the front supporting leg 2 .

[0067] This embodiment utilizes two groups of support components to connect the front leg 2 and the rear leg 1, thereby increasing the structural strength and improving the force effect.

[0068] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A leg device, used for mounting on a base frame (100), characterized in that: The leg device comprises a telescopic driving member (3) and at least two leg structures arranged in sequence, the leg structure farthest from the base frame (100) is the end leg (1), the leg structure second farthest from the base frame (100) is the front leg (2), the front leg (2) is rotatably connected to the end leg (1) around a first vertical line (200), the fixed end of the telescopic driving member (3) is rotatably connected to one of the front leg (2) and the end leg (1), the output end of the telescopic driving member (3) is rotatably connected to the other of the front leg (2) and the end leg (1), and the telescopic driving member (3) is used to drive the end leg (1) and the front leg (2) to rotate relative to each other around the first vertical line (200).

2. The leg support device according to claim 1, characterized in that: The leg device comprises at least three leg structures arranged in sequence, and except for the end leg (1) and the front leg (2), the remaining leg structures are telescopic legs (4), and the front leg (2) is slidably connected with the adjacent telescopic legs (4) along a horizontal direction toward or away from the base frame (100).

3. The leg support device according to claim 1, characterized in that: The central axis of the telescopic driving member (3) is located in a horizontal plane, and the central axis of the telescopic driving member (3) does not intersect with the first vertical line (200).

4. The leg support device according to claim 3, characterized in that: The fixed end and the output end of the telescopic driving member (3) are both located on the same side of the connection point between the front leg (2) and the end leg (1); Alternatively, the fixed end and the output end of the telescopic driving member (3) are respectively located on both sides of the connection point between the front supporting leg (2) and the end supporting leg (1).

5. The leg support device according to any one of claims 1 to 4, characterized in that: A limiting member (5) is also provided between the front end leg (2) and the terminal leg (1), one end of the limiting member (5) is connected to one of the front end leg (2) and the terminal leg (1), and the other end of the limiting member (5) selectively abuts against the other of the front end leg (2) and the terminal leg (1).

6. The leg support device according to claim 5, characterized in that: When the other end of the limiting member (5) abuts against the other of the front leg (2) and the rear leg (1), the front leg (2) and the rear leg (1) are in a straightened state.

7. The leg support device according to claim 5, characterized in that: A cushion block (6) is also provided between the front leg (2) and the terminal leg (1); the limiting member (5) is provided on one of the front leg (2) and the terminal leg (1); the cushion block (6) is provided on the other of the front leg (2) and the terminal leg (1); and the limiting member (5) selectively abuts against the cushion block (6).

8. The leg support device according to claim 5, characterized in that: The leg structure connected to the limiting member (5) is provided with an internal thread, the limiting member (5) is provided with an external thread, and the limiting member (5) is threadedly connected to the leg structure.

9. The leg support device according to any one of claims 1 to 4, characterized in that: Two groups of support components are provided between the front support leg (2) and the terminal support leg (1), and the two groups of support components are arranged at intervals in the vertical direction. The support components include a first support ear (71), a pin shaft (72) and two second support ears (73), the first support ear (71) is fixedly connected to one of the front support leg (2) and the terminal support leg (1), and the second support ear (73) is fixedly connected to the other of the front support leg (2) and the terminal support leg (1); In the same group of the supporting components, the two second supporting ears (73) are respectively located on the upper and lower sides of the first supporting ear (71), the pin shaft (72) passes through the first supporting ear (71) and the two second supporting ears (73), and the first supporting ear (71) and the second supporting ear (73) rotate around the central axis of the pin shaft (72) as the center line.

10. Concrete pump truck, characterized in that: The concrete pump truck comprises a base frame (100) and a leg device according to any one of claims 1 to 9, wherein the leg device is mounted on the base frame (100).

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