A main cylinder support structure and pumping machinery

Abstract

This invention discloses a main hydraulic cylinder support structure and pumping mechanism, including a support base and a flexible curved plate. The support base and the flexible curved plate are fixedly connected. The support base supports the main hydraulic cylinder body, and multiple sets of U-bolts are fixedly connected to the surface of the support base. Guide rail grooves are provided on both sides of the flexible curved plate, and the guide rail grooves are connected to corresponding threaded plate guide rails for moving the flexible curved plate up and down. This invention uses U-bolts to fix multiple main hydraulic cylinders together, achieving bidirectional support for the main hydraulic cylinders, improving the overall rigidity of the main hydraulic cylinders, and reducing the sway phenomenon during the operation of the main hydraulic cylinders. A double-hinge point structure is designed, allowing the support base to be adjusted in four directions: front, back, left, and right. The deformation trajectory of the flexible curved plate is determined by the initial pre-deformation of the flexible curved plate, achieving flexible connection of the support base.

Description

Technical Field

[0001] This invention relates to a main hydraulic cylinder support structure and a pumping mechanism, belonging to the field of engineering machinery technology. Background Technology

[0002] A concrete pump truck is an engineering machine that uses pressure to transport pre-mixed concrete along a pipeline to a certain height and distance, and it is widely used in modern construction projects. The pumping mechanism is the core component of the concrete pump truck; it is its actuator, the part that converts hydraulic energy into concrete conveying pressure, and the key device for achieving continuous concrete pumping.

[0003] The pumping mechanism is usually flexibly fixed to the subframe at the hopper hinge and water trough. In recent years, with the increasing demands for lightweight concrete pump trucks and higher cost requirements, the wall thickness of the main pumping cylinder, the rigidity of the pumping mechanism, and the rigidity of the subframe have become weaker. This has resulted in a decrease in the fixing rigidity of the pumping mechanism, leading to greater deformation of the pumping mechanism during the pumping process. In particular, the main pumping cylinder structure, due to its unique cantilever structure, will wobble under the action of its own weight and concrete resistance during operation. This reduces the service life of the guide sleeve, piston structure, concrete seal, and conveying cylinder structure of the main pumping cylinder.

[0004] As construction companies place increasingly higher demands on project quality and schedule, the reliability and performance requirements for pumping systems are also rising. The pumping mechanism, as a core component of pumping machinery, is equipped with connecting devices; the reliability of these devices directly determines the performance of the pumping mechanism and, consequently, the product's market competitiveness. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a main cylinder support structure and pumping mechanism to solve the problem of unsupported cantilever of the main cylinder in the pumping mechanism.

[0006] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0007] In a first aspect, the present invention provides a main hydraulic cylinder support structure, including a support base and a flexible curved plate, wherein the support base and the flexible curved plate are fixedly connected, the support base supports the main hydraulic cylinder body, and multiple sets of U-bolts are fixedly connected to the surface of the support base; guide rail grooves are provided on both sides of the flexible curved plate, and the guide rail grooves are connected to corresponding threaded plate guide rails for moving the flexible curved plate up and down.

[0008] Furthermore, it also includes a support base adjustment mechanism, which includes two sets of support rods and screw sleeves. One end of each set of support rods is fixedly connected to the support base and the flexible bending plate by a pin, and the other end is provided with a threaded section. The screw sleeves are threadedly connected to the threaded sections of the two sets of support rods, and the two ends of the screw sleeves are also provided with nuts, which are threadedly connected to the threaded sections.

[0009] Furthermore, the surface of the support seat is flexibly fixed to the main cylinder body by a nylon pad.

[0010] Furthermore, a support is provided on one side of the flexible bending plate, and stiffening plates for supporting the flexible bending plate are provided on both sides of the support.

[0011] Furthermore, the threaded plate guide rail is bolted to the subframe, and the threaded plate guide rail is provided with subframe fixing holes that match the bolts.

[0012] Furthermore, a rubber pad is provided at the connection between the U-bolt and the main cylinder to protect the main cylinder.

[0013] Furthermore, one end of the support rod connecting pin is provided with a hinge pin mounting hole.

[0014] Furthermore, the screw sleeve is provided with a groove for pre-tightening the nut.

[0015] Furthermore, the number of pins is at least two.

[0016] In a second aspect, the present invention provides a pumping mechanism, wherein the pumping mechanism is equipped with a main cylinder support structure as described in the first aspect.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0018] This invention discloses a main hydraulic cylinder support structure, including a support base and a flexible curved plate. The support base and the flexible curved plate are fixedly connected. The support base supports the main hydraulic cylinder body, and multiple sets of U-bolts are fixedly connected to the surface of the support base to fix multiple main hydraulic cylinders together, achieving bidirectional support for the main hydraulic cylinder, improving the overall rigidity of the main hydraulic cylinder, and reducing the sway phenomenon during the operation of the main hydraulic cylinder. Guide rail grooves are provided on both sides of the flexible curved plate, and the guide rail grooves are connected to the corresponding threaded plate guide rails, which can move the flexible curved plate up and down. A double hinge point structure is designed so that the support base can be adjusted in four directions: front, back, left, and right. By setting the plate thickness parameters and bending radius parameters of the flexible curved plate, the stiffness coefficient of the flexible suspension can be changed to obtain the desired suspension structure. The deformation trajectory of the flexible curved plate is determined by the initial pre-deformation of the flexible curved plate, realizing the flexible connection of the support base. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram of a main hydraulic cylinder support seat provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a planar structure of a main hydraulic cylinder support seat provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of one side of the flexible curved plate in a main cylinder support structure provided in an embodiment of the present invention;

[0022] Figure 4 The flexible bending plate in the main cylinder support structure provided in this embodiment of the invention is relative to... Figure 3 A schematic diagram of the structure on the other side;

[0023] Figure 5 This is a schematic diagram of the flexible bent plate cross-section structure in a main cylinder support structure provided by an embodiment of the present invention;

[0024] Figure 6 This is a detailed structural diagram of the support rod portion in a main cylinder support structure provided in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the stiffness change curve of the flexible bending plate in the main cylinder support structure under tension, provided in an embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the stiffness change curve of the flexible bending plate in the main cylinder support structure under compression, provided in an embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram of another three-dimensional structure of a main cylinder support provided in an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of a pumping machine provided in an embodiment of the present invention;

[0029] In the diagram: 1. Support seat; 2. Nylon pad; 3. Flexible bending plate; 4. Support rod; 5. Screw sleeve; 6. U-bolt; 7. Rubber pad; 8. Threaded plate guide rail; 9. Nut; 10. Pin; 31. Rib plate; 32. Support; 33. Fixed threaded hole; 34. Subframe fixing hole; 35. Guide rail groove; A. Pumping main cylinder support seat structure; B. Water tank hinge; C. Pumping mechanism hopper hinge. Detailed Implementation

[0030] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0031] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0032] Example 1:

[0033] like Figures 1-6 As shown, this embodiment provides a main hydraulic cylinder support structure, which is a suspended hinged structure including a support base 1 and a flexible bending plate 3. The support base 1 and the flexible bending plate 3 are fixedly connected. The support base 1 supports the main hydraulic cylinder body, and multiple sets of U-bolts 6 are fixedly connected to the surface of the support base 1 for fixing multiple main hydraulic cylinders together. The surface of the support base 1 is flexibly fixed to the main hydraulic cylinder body by a nylon pad 2. There are two main hydraulic cylinders. The support base 1 supports the main hydraulic cylinder body, and the U-bolts 6 fix the two main hydraulic cylinders together, achieving the purpose of limiting horizontal sway. At the same time, the two main hydraulic cylinders form a truss structure, which has higher overall rigidity and reduces the amount of sway. A rubber pad 7 is provided at the connection between the U-bolt 6 and the main hydraulic cylinder to protect the main hydraulic cylinder and reduce the deformation generated when the main hydraulic cylinder is tightened.

[0034] The structure also includes a support adjustment mechanism, which comprises two sets of support rods 4 and screw sleeves 5. One end of each set of support rods 4 is fixedly connected to the support base 1 and the flexible bending plate 3 via pins 10, and the other end is provided with a threaded section. The screw sleeves 5 are threadedly connected to the threaded sections of the two sets of support rods 4. One end of the support rod 4 connected to the pin 10 is provided with a hinge pin mounting hole, and the thread engages with the screw sleeve 5. The position of the support base 1 can be adjusted up and down by adjusting the thread insertion length. To ensure reliable threaded connection and prevent loosening, both ends of the screw sleeve 5 are also provided with nuts 9 for fastening the connection. The nuts 9 are threadedly connected to the threaded sections, and the nuts 9 are tightened to prevent loosening.

[0035] To ensure simple assembly and convenient gap adjustment, a groove is provided on the screw sleeve 5 to ensure pre-tightening when the nut 9 is tightened. By fixing the position of the groove, the support rod 4 can be adjusted at will, solving the problems of insufficient assembly adjustment range and many product types and models, making the support rod 4 more adaptable.

[0036] The flexible bending plate 3 has guide rail grooves 35 on both sides, which are connected to corresponding threaded plate guide rails 8. The flexible bending plate 3 is fixed to the threaded plate guide rails 8 by bolts, allowing the flexible bending plate 3 to move up and down, achieving flexible connection and adjustment. A support 32 is provided on one side of the flexible bending plate 3, and stiffening plates 31 are provided on both sides of the support 32 to support the flexible bending plate 3. This achieves both the connection function of the flexible bending plate 3 and ensures its reliability. This structure achieves bidirectional support for the main hydraulic cylinder by the support seat 1, solving the problem that the previous main hydraulic cylinder support seat 1 could only provide unidirectional support for the main hydraulic cylinder.

[0037] It should be noted that removing the nylon pad 2 and the rubber pad 7 from the main cylinder support seat 1 structure can still achieve the purpose of bidirectional support for the main cylinder support seat 1.

[0038] The threaded plate guide rail 8 is bolted to the subframe, and the threaded plate guide rail 8 is provided with subframe fixing holes 34 that match the bolts. The threaded plate guide rail 8 is also provided with fixing threaded holes 33. In addition, the threaded plate guide rail 8 can be replaced with a closed guide rail structure, and the threaded plate guide rail 8 can be welded to the subframe, which can also achieve the fixing of the flexible bending plate 3.

[0039] Because the subframe and the main cylinder support are two separate components, the installation error is relatively large. To solve the installation problem, a three-dimensional adjustable double-hinge structure is set up, allowing support 1 to be adjusted in four directions: front, rear, left, and right. Figure 6 As shown, the top of the support base 1 is provided with hinge point holes. The hinge points of the double hinge point structure are designed at 90°. Each hinge point is provided with a pin 10, and the number of pins 10 is at least two.

[0040] It should be noted that the flexible bending plate 3 structure in this embodiment is formed by bending a thin plate. This structure has low stiffness, similar to a leaf spring structure, and can achieve positioning in two directions. This structure is linearly elastic, and its displacement and force exhibit the following characteristics: Figure 7 and Figure 8 The variation pattern shown indicates that the stiffness coefficient of the flexible bent plate 3 structure can be derived as K = F / L. The stiffness coefficient can be adjusted by modifying the plate thickness t and the initial bending radius R. The plate thickness t and bending radius R can be arbitrarily combined to achieve the desired stiffness. Designing the pre-deformation of the flexible bent plate 3 and determining the deformation trajectory makes it easier to achieve flexible connections.

[0041] It is important to note that, such as Figure 9 As shown, in this embodiment, the flexible curved plate 3 can be fixed not only above the support base 1 by the support base adjustment mechanism, but also below the support base 1 by the support base adjustment mechanism.

[0042] The main cylinder support structure provided in this embodiment supports the main cylinder body through a support seat 1. The support seat 1 and the flexible bending plate 3 are fixedly connected through a support seat adjustment mechanism. Multiple sets of U-bolts 6 are fixedly connected to the surface of the support seat 1 to fix the two main cylinders together, realizing bidirectional support for the main cylinders, improving the overall rigidity of the main cylinders, and reducing the sway phenomenon during the operation of the main cylinders. The flexible bending plate 3 is provided with guide rail grooves 35 on both sides, and the guide rail grooves 35 are connected to the corresponding threaded plate guide rails 8, which can make the flexible bending plate 3 move up and down. The design of a double hinge point structure allows the support seat to be adjusted in four directions: front, back, left, and right. By setting the plate thickness parameters and bending radius parameters of the flexible bending plate 3, the stiffness coefficient of the flexible suspension can be changed to obtain the required suspension structure. The deformation trajectory of the flexible bending plate 3 is determined by the initial pre-deformation of the flexible bending plate 3, realizing the flexible connection of the support seat 1.

[0043] Example 2:

[0044] like Figure 10 As shown, this embodiment provides a pumping machine, which is equipped with a main cylinder support structure as described in Embodiment 1.

[0045] Under the influence of its own weight and pumping thrust, the main pumping cylinder is prone to swaying, causing the piston seal and guide sleeve seal of the main pumping cylinder to bear eccentric loads, resulting in uneven wear of the main pumping cylinder seal and guide sleeve. Simultaneously, the swaying of the main pumping cylinder causes misalignment between the cylinder rod and the concrete conveying cylinder, resulting in uneven wear of the concrete sealing body and the concrete conveying cylinder. In this embodiment, the hopper hinge portion of the pumping mechanism is marked as C, the water trough hinge portion as B, and the main pumping cylinder support structure as A. Based on the flexible fixing of the hopper hinge C and water trough hinge B, this embodiment sets the main pumping cylinder support structure A at 2 / 3 of the main pumping cylinder. The support structure 1 is fixed to the subframe, and U-bolts 6 are fixedly connected to the surface of the support 1, fixing the two main pumping cylinders together, achieving bidirectional support for the main pumping cylinder, improving the overall rigidity of the main cylinder, and solving the swaying problem of the long cantilever beam structure of the main pumping cylinder.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A main hydraulic cylinder support structure, characterized in that, It includes a support base (1) and a flexible bending plate (3), the support base (1) and the flexible bending plate (3) are fixedly connected, the support base (1) supports the main cylinder body, and multiple sets of U-bolts (6) are fixedly connected to the surface of the support base (1); the flexible bending plate (3) is provided with guide rail grooves (35) on both sides, and the guide rail grooves (35) are connected to the corresponding threaded plate guide rails (8) for moving the flexible bending plate (3) up and down; It also includes a support base adjustment mechanism, which includes two sets of support rods (4) and screw sleeves (5). One end of each of the two sets of support rods (4) is fixedly connected to the support base (1) and the flexible bending plate (3) by a pin (10), and the other end is provided with a threaded section. The screw sleeves (5) are threadedly connected to the threaded sections of the two sets of support rods (4), and the two ends of the screw sleeves (5) are also provided with nuts (9), which are threadedly connected to the threaded sections. The flexible bending plate (3) is provided with a support (32) on one side, and stiffening plates (31) for supporting the flexible bending plate (3) are provided on both sides of the support (32).

2. The main hydraulic cylinder support structure according to claim 1, characterized in that, The main cylinder body is softly fixed to the surface of the support base (1) by a nylon pad (2).

3. The main hydraulic cylinder support structure according to claim 1, characterized in that, The threaded plate guide rail (8) is bolted to the subframe, and the threaded plate guide rail (8) is provided with subframe fixing holes (34) that match the bolts.

4. The main hydraulic cylinder support structure according to claim 1, characterized in that, The U-bolt (6) is provided with a rubber pad (7) at the connection between it and the main cylinder to protect the main cylinder.

5. The main hydraulic cylinder support structure according to claim 1, characterized in that, The support rod (4) has a hinge pin mounting hole at one end of the connecting pin (10).

6. The main hydraulic cylinder support structure according to claim 1, characterized in that, The screw sleeve (5) has a groove for pre-tightening the nut (9).

7. The main hydraulic cylinder support structure according to claim 1, characterized in that, The number of the pins (10) is at least two.

8. A pumping machine, characterized in that, The pumping machinery is equipped with a main cylinder support structure as described in any one of claims 1 to 7.

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