Combined arm and concrete pump truck

Abstract

The utility model discloses a combined arm and a concrete pump truck in the technical field of concrete equipment, and aims to solve the problems of clamping stagnation, low distribution precision and the like of a terminal hose in the prior art. The combined arm comprises a rotary table, a crank arm and a folding arm, one end of the crank arm is hinged with the rotary table, and the other end of the crank arm is hinged with the folding arm through the crank arm; a conveying pipe is arranged on the combined arm, and the conveying pipe can extend to a designated position to convey concrete through unfolding or folding of the combined arm. According to the utility model, the material distribution precision and stability of the concrete pump truck during fixed-point material distribution in the vertical direction can be improved, and the operation is simple.

Description

Technical Field

[0001] The utility model relates to a combined arm and a concrete pump truck, belonging to the technical field of concrete equipment. Background Art

[0002] With the steady development of the global economy, the application scope of concrete pump trucks is becoming wider and wider. They are widely used in urban construction, overpasses, airports, residential areas, etc., and the requirements for the accuracy and safety of concrete pump trucks are becoming higher and higher.

[0003] The concrete pump truck delivers concrete to the designated location through the delivery pipe on the folding arm, and changes the delivery position through the rotation of the turntable and the expansion and contraction of the folding arm to meet the needs of delivering concrete to different locations.

[0004] The motion trajectory of the folding boom section of the existing concrete pump truck is a circle with the boom hinge point as the center and the boom length as the radius. Therefore, if fixed-point material distribution in the vertical direction is to be carried out, such as piling, the operator needs to control the extension and retraction of at least two variable-length cylinders at the same time, and needs to continuously adjust the boom posture according to the different material distribution heights, which makes the operation complicated and the construction efficiency low.

[0005] Since the position of the material distribution point depends on the operator's experience and judgment to achieve the compound movement of the multi-section arm, and the terminal hose rotates under the action of its own weight, there is a jamming problem. There is a difference between the actual material distribution point and the predicted point position, the material distribution accuracy is low, and there may be a risk of collision between the arm and the building. Utility Model Content

[0006] The utility model aims to overcome the deficiencies in the prior art and provide a combined arm and a concrete pump truck, which can improve the distribution accuracy and stability of the concrete pump truck when distributing materials at a fixed point in the vertical direction and are easy to operate.

[0007] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0008] On the one hand, the utility model provides a combined arm, comprising a turntable, a curved arm and a folding arm, wherein one end of the curved arm is hinged to the turntable, and the other end is hinged to the folding arm through a crank arm;

[0009] The crank arm comprises a first arm, a second arm and a connecting rod assembly, one end of the first arm is hinged to the turntable, and the other end is hinged to the connecting rod assembly, one end of the second arm is hinged to the connecting rod assembly, and the other end is hinged to the crank arm, both sides of the first arm are provided with a crank arm variable amplitude oil cylinder, the cylinder bottom end of the crank arm variable amplitude oil cylinder is hinged to the first arm, and the piston rod end is hinged to the second arm;

[0010] The folding arm comprises a first-section arm, a second-section arm and a third-section arm which are hinged in sequence, and the end of the first-section arm is hinged to the crank arm; the first-section arm, the second-section arm and the third-section arm are respectively equipped with a first-section arm luffing oil cylinder, a second-section arm luffing oil cylinder and a third-section arm luffing oil cylinder, the cylinder bottom end of the first-section arm luffing oil cylinder is hinged to the first-section arm, and its piston rod end is hinged to the crank arm, the cylinder bottom end of the second-section arm luffing oil cylinder is hinged to the first-section arm, and its piston rod end is hinged to the second-section arm, the cylinder bottom end of the third-section arm luffing oil cylinder is hinged to the second-section arm, and its piston rod end is hinged to the third-section arm;

[0011] The combined arm is provided with a conveying pipe, and the conveying pipe can be extended to a designated position to convey concrete by expanding or contracting the combined arm.

[0012] Optionally, the group of arms includes a group of upper arm links and a group of lower arm links, the two groups of arms include two groups of upper arm links and two groups of lower arm links, and the link assembly includes a first link and a second link.

[0013] Optionally, the second connecting rod has five hinge points, which are hinge point 1, hinge point 2, hinge point 3, hinge point 4 and hinge point 5, the crank arm is provided with crank arm hinge point 1, crank arm hinge point 2 and crank arm hinge point 3, and the turntable is provided with an upper hinge point and a lower hinge point.

[0014] The upper connecting rod of the group of arms is hinged to the upper hinge point, and the other end is hinged to the second hinge point;

[0015] The lower connecting rod of the group of arms is hinged to the lower hinge point, and the other end is hinged to the hinge point 1 and the first connecting rod;

[0016] The upper connecting rod of the two sets of arms is hinged to hinge point 4, and the other end is hinged to hinge point 2 of the crank arm;

[0017] The lower connecting rod of the two sets of arms is three-hinged with the hinge point, and the other end is three-hinged with the hinge point of the crank arm;

[0018] The first connecting rod is hinged to hinge point five.

[0019] Optionally, the bottom end of the boom-length-changing oil cylinder is hinged to the second hinge point of the crank arm, and the end of the boom away from the second boom is hinged to one hinge point of the crank arm.

[0020] Optionally, the conveying pipe includes a curved arm conveying pipe, a folding arm conveying pipe and a terminal hose, the end of the curved arm conveying pipe passes through a hinge point of the crank arm and is connected to one end of the folding arm conveying pipe, the other end of the folding arm conveying pipe is connected to the terminal hose, and the terminal hose is arranged on the three-section arm.

[0021] Optionally, the curved arm conveying pipe and the folding arm conveying pipe are respectively fixed on the curved arm and the folding arm through a conveying pipe bracket.

[0022] On the other hand, the utility model provides a concrete pump truck, comprising any one of the combined arms described above, wherein the combined arm is arranged on the concrete pump truck via a turntable.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model adopts a boom composed of a crank arm and a folding arm. The boom can be unfolded to a designated concrete placing position by controlling the extension and retraction of the variable-length oil cylinders of each section of the folding arm. The end of the discharge port can be moved horizontally in the vertical direction by controlling the extension and retraction of the variable-length oil cylinders of the crank arm to carry out fixed-point placing.

[0025] The utility model does not need to adjust the rotation angle of the folding arm when placing materials at a fixed point, and the terminal hose does not need to be rotated, thus avoiding the problem of hose jamming;

[0026] The utility model can realize the vertical translation of the arm by operating the crank arm luffing oil cylinder alone, so as to meet the requirement of fixed-point material distribution of the pump truck, and has the advantages of simple and safe operation and high material distribution precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the unfolded structure of the combined arm in one embodiment of the utility model;

[0028] Figure 2 It is a schematic diagram of the folding structure of the combined arm in one embodiment of the utility model;

[0029] In the figure: 1 crank arm, 101 a group of upper arm connecting rods, 102 a group of lower arm connecting rods, 103 a second group of upper arm connecting rods, 104 a second group of lower arm connecting rods, 105 a first connecting rod, 106 a second connecting rod, 107 hinge point 1, 108 hinge point 2, 109 hinge point 3, 110 hinge point 4, 111 hinge point 5, 2 folding arm, 201 a first-section arm, 202 a second-section arm, 203 a third-section arm, 3 crank arm, 301 crank arm hinge point 1, 302 crank arm hinge point 2, 303 crank arm hinge point 3, 4 turntable, 401 lower hinge point, 402 upper hinge point, 5 crank arm luffing cylinder, 6 a first-section arm luffing cylinder, 7 a second-section arm luffing cylinder, 8 a third-section arm luffing cylinder, 9 crank arm delivery pipe, 10 folding arm delivery pipe, 11 terminal hose, 12 delivery pipe bracket. Implementation

[0030] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection 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 the present invention can be understood by specific circumstances. Example

[0033] like Figure 1 As shown, the combined arm provided by the embodiment of the utility model includes a turntable 4, a curved arm 1 and a folding arm 2, one end of the curved arm 1 is hinged to the turntable 4, and the other end is hinged to the folding arm 2 through a crank arm 3.

[0034] The turntable 4 is provided with an upper hinge point 402 and a lower hinge point 401. The crank arm 1 includes a first arm, a second arm and a connecting rod assembly. The first arm and the second arm are both composed of two connecting rods, namely an upper connecting rod and a lower connecting rod. The connecting rod assembly is arranged between the first arm and the second arm. The connecting rod assembly includes a first connecting rod 105 and a second connecting rod 106. The second connecting rod 106 has five hinge points, namely, hinge point 1 107, hinge point 2 108, hinge point 3 109, hinge point 4 110 and hinge point 5 111. The crank arm 3 is provided with a crank arm hinge point 1 301, a crank arm hinge point 2 302 and a crank arm hinge point 3 303. The folding arm 2 includes a first section arm 201, a second section arm 202 and a third section arm 203 which are hinged in sequence.

[0035] The connection relationship between the components of the turntable 4, the curved arm 1, and the folding arm 2 is specifically as follows: a group of upper arm connecting rods 101 are hinged to the upper hinge 402, and the other end is hinged to the second hinge 108. A group of lower arm connecting rods 102 are hinged to the lower hinge 401, and the other end is hinged to the first hinge 107 and the first connecting rod 105. The second group of upper arm connecting rods 103 are hinged to the fourth hinge 110, and the other end is hinged to the second hinge 302 of the turning arm. The second group of lower arm connecting rods 104 are hinged to the third hinge 109, and the other end is hinged to the third hinge 303 of the turning arm. The first connecting rod 105 is hinged to the fifth hinge 111. One end of the first section arm 201 away from the second section arm 202 is hinged to the first hinge 301 of the turning arm.

[0036] It also includes a crank arm luffing cylinder 5, a first-section arm luffing cylinder 6, a second-section arm luffing cylinder 7 and a third-section arm luffing cylinder 8. There are two crank arm luffing cylinders 5, which are symmetrically arranged on both sides of a group of arms. The cylinder bottom end of the crank arm luffing cylinder 5 is hinged to the lower connecting rod 102 of the first group of arms, and the piston rod end is hinged to the upper connecting rod 103 of the second group of arms. The cylinder bottom end of the first-section arm luffing cylinder 6 is hinged to the second hinge point 302 of the crank arm, and the piston rod end is hinged to the first-section arm 201. The cylinder bottom end of the second-section arm luffing cylinder 7 is hinged to the first-section arm 201, and the piston rod end is hinged to the second-section arm 202. The cylinder bottom end of the third-section arm luffing cylinder 8 is hinged to the second-section arm 202, and the piston rod end is hinged to the third-section arm 203.

[0037] It also includes a delivery pipe, which consists of a crank arm delivery pipe 9, a folding arm delivery pipe 10 and a terminal hose 11 connected in sequence. The crank arm delivery pipe 9 and the folding arm delivery pipe 10 are respectively fixed on the crank arm 1 and the folding arm 2 through two delivery pipe brackets 12.

[0038] The end of the curved arm conveying pipe 9 passes through the crank arm hinge 301 and is connected to one end of the folding arm conveying pipe 10. The other end of the folding arm conveying pipe 10 is connected to the terminal hose 11. The terminal hose 11 is arranged on the three-section arm 203. The terminal hose 11 is fixed to the three-section arm 203 and there is no relative movement.

[0039] In some embodiments, it should be possible to change the relative position of the folding arm in the combined arm; the folding form and number of sections of the folding arm; the arrangement of the terminal hose, etc. Example

[0040] On the basis of Embodiment 1, this embodiment provides a concrete pump truck, which comprises the combined arm described in Embodiment 1, and the turntable 4 of the combined arm is installed on the concrete pump truck.

[0041] The working principle of the utility model is as follows: in the working state, the boom is unfolded to the specified position by controlling the extension and retraction of the luffing cylinders of each section of the folding arm 2 and the extension and retraction of the crank arm luffing cylinder 5, and the end of the discharge port can be moved horizontally in the vertical direction by controlling the extension and retraction of the crank arm luffing cylinder 5 to carry out fixed-point distribution.

[0042] In the non-working state, when the boom luffing cylinder 5 is fully retracted to the shortest position, the boom 1 is in a fully retracted state, and at the same time, when the luffing cylinders of the folding arm 2 are controlled to be retracted to the shortest position, the folding arm 2 and the terminal hose 11 are adjusted to a fully retracted state.

[0043] The above is only a preferred embodiment of the present invention. 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 invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A combined arm, characterized in that: It comprises a turntable, a curved arm and a folding arm, wherein one end of the curved arm is hinged to the turntable, and the other end is hinged to the folding arm through a crank arm; The crank arm comprises a first arm, a second arm and a connecting rod assembly, one end of the first arm is hinged to the turntable, and the other end is hinged to the connecting rod assembly, one end of the second arm is hinged to the connecting rod assembly, and the other end is hinged to the crank arm, both sides of the first arm are provided with a crank arm variable amplitude oil cylinder, the cylinder bottom end of the crank arm variable amplitude oil cylinder is hinged to the first arm, and the piston rod end is hinged to the second arm; The folding arm comprises a first-section arm, a second-section arm and a third-section arm which are hinged in sequence, and the end of the first-section arm is hinged to the crank arm; the first-section arm, the second-section arm and the third-section arm are respectively equipped with a first-section arm luffing oil cylinder, a second-section arm luffing oil cylinder and a third-section arm luffing oil cylinder, the cylinder bottom end of the first-section arm luffing oil cylinder is hinged to the first-section arm, and its piston rod end is hinged to the crank arm, the cylinder bottom end of the second-section arm luffing oil cylinder is hinged to the first-section arm, and its piston rod end is hinged to the second-section arm, the cylinder bottom end of the third-section arm luffing oil cylinder is hinged to the second-section arm, and its piston rod end is hinged to the third-section arm; The combined arm is provided with a conveying pipe, and the conveying pipe can be extended to a designated position to convey concrete by expanding or contracting the combined arm.

2. The combined arm according to claim 1, characterized in that: The group of arms includes a group of upper arm links and a group of lower arm links, the two groups of arms include two groups of upper arm links and two groups of lower arm links, and the link assembly includes a first link and a second link.

3. The combined arm according to claim 2, characterized in that: The second connecting rod has five hinge points, which are hinge point 1, hinge point 2, hinge point 3, hinge point 4 and hinge point 5. The crank arm is provided with crank arm hinge point 1, crank arm hinge point 2 and crank arm hinge point 3. The turntable is provided with an upper hinge point and a lower hinge point. The upper connecting rod of the group of arms is hinged to the upper hinge point, and the other end is hinged to the second hinge point; The lower connecting rod of the group of arms is hinged to the lower hinge point, and the other end is hinged to the hinge point 1 and the first connecting rod; The upper connecting rod of the two sets of arms is hinged to hinge point 4, and the other end is hinged to hinge point 2 of the crank arm; The lower connecting rod of the second set of arms is three-jointed with the hinge point, and the other end is three-jointed with the hinge point of the crank arm; The first connecting rod is hinged to hinge point five.

4. The combined arm according to claim 1, characterized in that: The cylinder bottom end of the one-section boom luffing oil cylinder is hinged to the second hinge point of the crank arm, and the end of the one-section boom away from the second-section boom is hinged to one hinge point of the crank arm.

5. The combined arm according to claim 1, characterized in that: The conveying pipe includes a crank arm conveying pipe, a folding arm conveying pipe and a terminal hose. The end of the crank arm conveying pipe passes through a hinge point of the crank arm and is connected to one end of the folding arm conveying pipe. The other end of the folding arm conveying pipe is connected to the terminal hose. The terminal hose is arranged on the three-section arm.

6. The combined arm according to claim 5, characterized in that: The curved arm conveying pipe and the folding arm conveying pipe are respectively fixed on the curved arm and the folding arm through a conveying pipe bracket.

7. A concrete pump truck, characterized in that: The invention comprises the combined arm according to any one of claims 1 to 6, wherein the combined arm is arranged on the concrete pump truck via a turntable.

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