Cylinder module, telescopic boom assembly and engineering machine

Abstract

The application relates to the technical field of engineering machinery, and discloses an oil cylinder module, a telescopic arm support assembly and engineering machinery. The oil cylinder module comprises a balance valve integrated cylinder body and a piston assembly; the balance valve integrated cylinder body is provided with a piston cavity; the piston assembly is inserted into the piston cavity and is in sliding sealing cooperation with the inner wall of the piston cavity, and the piston assembly divides the piston cavity into a rod cavity and a rodless cavity; wherein the balance valve integrated cylinder body is in communication with the corresponding rod cavity and rodless cavity through independent oil channels, and the balance valve integrated cylinder body is used for adjusting the opening of the oil channel according to the pressure difference in the corresponding oil channel. The oil cylinder module disclosed by the application realizes the integration of the oil cylinder and the balance valve in structure and function, the structure is more compact, so that the balance valve does not need to be additionally configured or installed during use, the occupation of space is reduced, and subsequent maintenance and repair are facilitated.

Description

Technical Field

[0001] This application belongs to the field of engineering machinery technology, specifically relating to a hydraulic cylinder module, a telescopic boom assembly, and engineering machinery. Background Technology

[0002] Telescopic boom forklifts quickly move goods to a designated height and range by moving the vehicle and extending and retracting the boom. They are characterized by not only being able to extend and retract while carrying a load, but also having fast extension and retraction speed and high efficiency.

[0003] During material handling, materials need to be kept in a fixed position. To prevent the goods from falling suddenly, a balance valve is used to lock the hydraulic oil in the telescopic cylinder. At the same time, because the boom extends and retracts quickly, the corresponding flow rate of the balance valve is large, resulting in a relatively large valve structure.

[0004] Currently, the balance valve and the telescopic cylinder are mostly set up independently, which requires more installation space at the tail of the telescopic boom. To address this, existing technology also installs the balance valve on the cylinder body of the telescopic cylinder. Although this solves the problem of large space occupation caused by separate installation, for small models, due to the smaller overall size and no reduction in overall working efficiency, a large-flow balance valve is still required. Therefore, the required balance valve has a larger structural size, which causes the balance valve to occupy a large space on the boom, greatly affecting the maintenance of the pipelines inside the boom. Utility Model Content

[0005] The purpose of this application is to provide a hydraulic cylinder module, a telescopic boom assembly, and engineering machinery to solve the problems of poor integration between existing balance valves and hydraulic cylinders, as well as the large space occupied by the boom and the impact on the maintenance of internal pipelines.

[0006] To achieve the above objectives, the first aspect of this application provides a hydraulic cylinder module, comprising: The balance valve is integrated into the cylinder block, and has a piston chamber and oil passage; and A piston assembly is inserted into the piston chamber and slides and seals against the inner wall of the piston chamber, the piston assembly dividing the piston chamber into a rod chamber and a rodless chamber; The integrated cylinder of the balance valve is connected to the corresponding rod chamber and rodless chamber through independent oil passages. The integrated cylinder of the balance valve is also provided with a balance control valve core for each oil passage. The balance control valve core is used to adjust the opening of the oil passage according to the pressure difference in the corresponding oil passage.

[0007] As a further improvement to the above technical solution: In some embodiments, the integrated cylinder of the balance valve further includes a first valve seat base and a cylinder; The cylinder has the piston chamber, and the cylinder includes a bottom end located in the axial direction of the piston chamber and an opposite top end, the top end being provided with a shaft hole for the piston rod in the piston assembly to pass through; The first valve seat base is disposed at the bottom end of the cylinder, and the first valve seat base is provided with two independent oil passages; The system includes two balance control valve cores, which are mounted on the first valve seat base. The control ends of the balance control valve cores extend into the corresponding oil passages.

[0008] In some embodiments, the independent oil passages provided in the first valve seat base are a first rodless cavity oil passage and a first rod cavity oil passage, and the end face or outer peripheral surface of the first valve seat base is provided with a first rodless cavity interface communicating with the first rodless cavity oil passage and a first rod cavity interface communicating with the first rod cavity oil passage. The first rodless chamber oil passage is directly connected to the rodless chamber along the axial direction, and the first rod chamber oil passage is connected to the rod chamber through a first external oil pipe disposed outside the cylinder. The first rodless chamber oil passage and the first rod chamber oil passage are respectively provided with the balance control valve core.

[0009] In some embodiments, both the cylinder and the first valve seat base are cylindrical, and the outer diameters of the cylinder and the first valve seat base are the same.

[0010] In some embodiments, the cylinder and the first valve seat base are an integral structure, or the cylinder and the first valve seat base are welded together as one unit.

[0011] In some embodiments, the integrated cylinder of the balance valve further includes a second valve seat base and a cylinder; The cylinder has the piston chamber, and the cylinder includes a bottom end located in the axial direction of the piston chamber and an opposite top end; The second valve seat base is disposed at the top end of the cylinder, and the second valve seat base is provided with a shaft hole for the piston rod in the piston assembly to pass through and two independent oil passages; The system includes two balance control valve cores, which are mounted on the second valve seat base. The control ends of the balance control valve cores extend into the corresponding oil passages.

[0012] In some embodiments, the independent oil passages provided in the second valve seat base are a second rodless cavity oil passage and a second rod cavity oil passage, and the end face or outer peripheral surface of the second valve seat base is provided with a second rodless cavity interface communicating with the second rodless cavity oil passage and a second rod cavity interface communicating with the second rod cavity oil passage. The second rodless chamber oil passage is connected to the rodless chamber via a second external oil pipe located outside the cylinder, and the second rod chamber oil passage is directly connected to the rod chamber. The second rodless chamber oil passage and the second rod chamber oil passage are respectively provided with the balance control valve core.

[0013] In some embodiments, the inner wall of the shaft hole of the second valve seat base is provided with a dynamic seal, which dynamically seals with the piston rod in the piston assembly; or, the cylinder and the second valve seat base are an integral structure, or the cylinder and the second valve seat base are welded together as one unit.

[0014] The second aspect of this application also provides a telescopic boom assembly, including a basic boom, a plurality of telescopic boom sections, and a cylinder module according to the first aspect above. One end of the hydraulic cylinder module is mounted on the basic arm, and the other end is used to drive the telescopic arm to extend or retract.

[0015] A third aspect of this application also provides an engineering machine, including a telescopic boom assembly according to the second aspect described above.

[0016] Compared with existing technologies, the hydraulic cylinder module, telescopic boom assembly, and engineering machinery provided in this application have at least the following technical advantages: The hydraulic cylinder module provided in this application integrates the balance valve integrated cylinder body and the piston assembly into a single module. The piston assembly is inserted into the piston chamber to form a rod chamber and a rodless chamber. The balance valve integrated cylinder body is connected to the corresponding rod chamber and rodless chamber through independent oil passages. The balance valve integrated cylinder body also has a balance control valve core for each oil passage. The balance control valve core adjusts the opening of the oil passage according to the pressure difference in the corresponding oil passage. In this way, the hydraulic cylinder module provided in this application achieves structural and functional integration of the hydraulic cylinder and the balance valve, resulting in a more compact structure. Therefore, no additional balance valve needs to be configured or installed during use, reducing space occupation and facilitating subsequent maintenance.

[0017] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the structure of a hydraulic cylinder module provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the assembly of the balance control valve core and the first valve seat base in the cylinder module provided in Embodiment 1 of this application; Figure 3 A partial structural schematic diagram of a telescopic boom assembly provided in Embodiment 1 of this application; Figure 4 This is a schematic diagram showing the flow of hydraulic oil when the telescopic boom assembly provided in Embodiment 1 of this application performs the boom extension action; Figure 5 This is a schematic diagram showing the flow of hydraulic oil when the telescopic boom assembly provided in Embodiment 1 of this application performs the boom retraction action; Figure 6 This is a schematic diagram of the structure of a hydraulic cylinder module provided in Embodiment 2 of this application; Figure 7 This is a schematic diagram of another hydraulic cylinder module provided in Embodiment 2 of this application; Figure 8 This is a schematic diagram of the assembly of the balance control valve core and the second valve seat base in the cylinder module provided in Embodiment 2 of this application; Figure 9 This is a schematic diagram showing the flow of hydraulic oil when the telescopic boom assembly provided in Embodiment 2 of this application performs the boom extension action; Figure 10 This is a schematic diagram showing the flow of hydraulic oil when the telescopic boom assembly provided in Embodiment 2 of this application performs the boom retraction action.

[0019] Explanation of reference numerals in the attached figures 100. Balance valve integrated cylinder body; 101. Rod chamber; 102. Rodless chamber; 110. Balance control valve core; 120. Oil passage; 120a. First valve seat base; 121a. First rodless chamber oil passage; 122a. First rod chamber oil passage; 123a. First rodless chamber interface; 124a. First rod chamber interface; 125a. First external oil pipe; 120b. Second valve seat base; 121b. Second rodless chamber oil passage; 122b. Second rod chamber oil passage; 123b. Second rodless chamber interface; 124b. Second rod chamber interface; 125b. Second external oil pipe; 130. Cylinder body; 200. Piston assembly; 210. Piston rod; 300, Basic Arm; 400. Telescopic boom. Detailed Implementation

[0020] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0021] The present application will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0022] Example 1 Please see Figure 1 and Figure 2 This embodiment provides a hydraulic cylinder module that integrates the balance valve and the hydraulic cylinder into one unit.

[0023] The hydraulic cylinder module provided in this embodiment includes a balance valve integrated cylinder body 100 and a piston assembly 200. The balance valve integrated cylinder body 100 is provided with a piston chamber; the piston assembly 200 is inserted into the piston chamber and slides and seals with the inner wall of the piston chamber, and the piston assembly 200 divides the piston chamber into a rod chamber 101 and a rodless chamber 102.

[0024] The balance valve integrated cylinder 100 is connected to the corresponding rod chamber 101 and rodless chamber 102 through independent oil passages 120. The balance valve integrated cylinder 100 is provided with a balance control valve core 110 for each oil passage 120. The balance control valve core 110 is used to adjust the opening of the oil passage 120 according to the pressure difference in the corresponding oil passage 120.

[0025] The cylinder module provided in this embodiment integrates the cylinder and the balance valve in terms of structure and function, resulting in a more compact structure. Thus, when installed on the telescopic boom assembly, there is no need to configure or install an additional balance valve, reducing the space occupied by the telescopic boom assembly and facilitating subsequent inspection and maintenance.

[0026] To more clearly describe the technical solution of this application, the hydraulic cylinder module provided in this embodiment will be described in detail below: The balanced valve integrated cylinder 100 provided in this embodiment also includes a first valve seat base 120a and a cylinder 130. The cylinder 130 has a piston chamber and includes a bottom end located in the axial direction of the piston chamber and an opposite top end. The top end is provided with a shaft hole through which the piston rod 210 in the piston assembly 200 passes.

[0027] The first valve seat base 120a is located at the bottom end of the cylinder 130. The first valve seat base 120a has two independent oil passages 120, which are respectively connected to the rod chamber 101 and the rodless chamber 102.

[0028] Two balance control valve cores 110 are provided, and the two balance control valve cores 110 are disposed on the first valve seat base 120a. That is to say, the first valve seat base 120a has two mounting holes for mounting the balance control valve cores 110, and the mounting holes extend to communicate with the corresponding oil passages 120. Thus, after the balance control valve cores 110 are installed in the corresponding mounting holes, the control ends of the balance control valve cores 110 extend into the corresponding oil passages 120, whereby the balance control valve cores 110 are used to adjust the opening of the corresponding oil passages 120 according to the pressure difference in the corresponding oil passages 120.

[0029] It is understandable that when the oil pressure difference on both sides of the balance control valve core 110 is greater than the threshold (which can be designed according to the actual application conditions), the balance control valve core 110 controls the oil passage 120 to open so as to facilitate oil inlet or outlet and ensure pressure balance.

[0030] Specifically, in order to more clearly describe the technical solution of this embodiment, the two independent oil passages 120 provided in the first valve seat base 120a are defined as the first rodless cavity oil passage 121a and the first rod cavity oil passage 122a. The end face or outer peripheral surface of the first valve seat base 120a is provided with a first rodless cavity interface 123a communicating with the first rodless cavity oil passage 121a and a first rod cavity interface 124a communicating with the first rod cavity oil passage 122a.

[0031] The first rodless chamber oil passage 121a is directly connected to the rodless chamber 102 along the axial direction. The first rod chamber oil passage 122a is connected to the rod chamber 101 through the first external oil pipe 125a located outside the cylinder 130. The first rodless chamber oil passage 121a and the first rod chamber oil passage 122a are respectively provided with balance control valve cores 110.

[0032] Optionally, the first external oil pipe 125a is a hollow steel pipe or a flexible hose.

[0033] In some embodiments, both the cylinder 130 and the first valve seat base 120a are cylindrical, and their outer diameters are the same. Of course, the outer diameters of the cylinder 130 and the first valve seat base 120a can also be designed to be different, depending on the application scenario.

[0034] In some embodiments, the cylinder 130 and the first valve seat base 120a are integral structures (integratedly machined), or the cylinder 130 and the first valve seat base 120a are welded together. That is to say, the end face of the first valve seat base 120a near the cylinder 130 directly forms the bottom of the piston chamber.

[0035] Please see Figure 1 , Figure 2 and Figure 3 This embodiment also provides a telescopic boom assembly that can be applied to construction machinery. The telescopic boom assembly includes a basic boom 300, a plurality of telescopic segment booms 400, and a cylinder module according to the above embodiment.

[0036] One end of the hydraulic cylinder module (which can be one end of the balance valve integrated cylinder 100 or one end of the piston assembly 200) is mounted on the basic arm 300, and the other end is used to drive the telescopic arm 400 to extend or retract.

[0037] In this embodiment, the balance control valve cores 110 corresponding to the first rodless chamber oil passage 121a and the first rod chamber oil passage 122a are both in a one-way normally closed state. That is, when the hydraulic oil pressure at the first rodless chamber interface 123a and the first rod chamber interface 124a is greater than the pressure at the rod chamber 101 and the rodless chamber 102, the hydraulic oil can directly enter the rod chamber 101 and the rodless chamber 102 through the balance control valve core 110. However, the hydraulic oil in the rodless chamber 102 and the rod chamber 101 can only return through the corresponding first rodless chamber interface 123a and the first rod chamber interface 124a after the respective balance control valve cores 110 are opened under the corresponding working conditions.

[0038] Therefore, this embodiment takes the example of one end of the balance valve integrated cylinder body 100 of the hydraulic cylinder module being installed on the basic boom 300. The detailed operation of the telescopic boom assembly is as follows: Please refer to the following: Figure 4 When the arm extends: oil enters the first rodless chamber interface 123a corresponding to the rodless chamber 102, and after passing through the corresponding balance control valve core 110, it directly enters the rodless chamber 102. At the same time, the balance control valve core 110 corresponding to the rod chamber 101 opens under pressure. The hydraulic oil in the rod chamber 101 flows out and returns through the first external oil pipe 125a and the first rod chamber oil passage 122a from the first rod chamber interface 124a, thereby pushing the piston rod 210 to extend, and then pushing the telescopic arm 400 to extend.

[0039] Please refer to the following: Figure 5 During arm retraction: oil enters through the first rod chamber interface 124a corresponding to the rod chamber 101, passes through the first rod chamber oil passage 122a, the corresponding balance control valve core 110, and the first external oil pipe 125a, and finally reaches the rod chamber 101. At the same time, the balance control valve core 110 corresponding to the rodless chamber 102 opens under pressure, and the hydraulic oil in the rodless chamber 102 flows out through the first rodless chamber interface 123a through the corresponding balance control valve core 110 and the first rodless chamber oil passage 121a, thereby pushing the piston rod 210 to retract, and then pushing the telescopic arm 400 to retract.

[0040] When not telescopic: The balance control valve cores 110 corresponding to the rodless chamber 102 and the rod chamber 101 are both in the closed state, that is, the hydraulic oil in the rodless chamber 102 and the rod chamber 101 will not flow out from the first rodless chamber interface 123a and the first rod chamber interface 124a corresponding to the first rodless chamber oil passage 121a and the first rod chamber oil passage 122a, thereby ensuring that the telescopic boom assembly always remains in the state when it is not working in the non-working state.

[0041] Furthermore, this embodiment also provides a piece of construction machinery. The construction machinery includes the telescopic boom assembly provided above. The construction machinery can be selected from cranes, aerial work platforms, etc.

[0042] Example 2 Please see Figure 6 , Figure 7 and Figure 8 This embodiment provides a hydraulic cylinder module that integrates the balance valve and the hydraulic cylinder into one unit.

[0043] The hydraulic cylinder module provided in this embodiment includes a balance valve integrated cylinder body 100 and a piston assembly 200. The balance valve integrated cylinder body 100 is provided with a piston chamber and an oil passage 120; the piston assembly 200 is inserted into the piston chamber and slides and seals with the inner wall of the piston chamber, and the piston assembly 200 divides the piston chamber into a rod chamber 101 and a rodless chamber 102.

[0044] The balance valve integrated cylinder 100 is connected to the corresponding rod chamber 101 and rodless chamber 102 through independent oil passages 120. The balance valve integrated cylinder 100 is also provided with a balance control valve core 110 for each oil passage 120. The balance control valve core 110 is used to adjust the opening of the oil passage 120 according to the pressure difference in the corresponding oil passage 120.

[0045] The cylinder module provided in this embodiment integrates the cylinder and the balance valve in terms of structure and function, resulting in a more compact structure. Thus, when installed on the telescopic boom assembly, there is no need to configure or install an additional balance valve, reducing the space occupied by the telescopic boom assembly and facilitating subsequent inspection and maintenance.

[0046] To more clearly describe the technical solution of this application, the hydraulic cylinder module provided in this embodiment will be described in detail below: The balanced valve integrated cylinder 100 provided in this embodiment also includes a second valve seat base 120b and a cylinder 130. The cylinder 130 has a piston chamber and includes a bottom end located in the axial direction of the piston chamber and an opposite top end.

[0047] The second valve seat base 120b is disposed at the top of the cylinder 130. The second valve seat base 120b has a shaft hole through which the piston rod 210 in the piston assembly 200 passes and two independent oil passages 120, which are respectively connected to the rod chamber 101 and the rodless chamber 102. That is to say, the second valve seat base 120b is equivalent to the top end cap of the cylinder 130.

[0048] Two balance control valve cores 110 are provided, and the two balance control valve cores 110 are disposed on the second valve seat base 120b. That is to say, the second valve seat base 120b has two mounting holes for mounting the balance control valve cores 110, and the mounting holes extend to communicate with the corresponding oil passages 120. Thus, after the balance control valve cores 110 are installed in the corresponding mounting holes, the control ends of the balance control valve cores 110 extend into the corresponding oil passages 120, whereby the balance control valve cores 110 are used to adjust the opening of the oil passages 120 according to the pressure difference in the corresponding oil passages 120.

[0049] It is understandable that when the oil pressure difference on both sides of the balance control valve core 110 is greater than the threshold (which can be designed according to the actual application conditions), the balance control valve core 110 controls the oil passage 120 to open so as to facilitate oil inlet or outlet and ensure pressure balance.

[0050] Specifically, to more clearly describe the technical solution of this embodiment, two independent oil passages 120 provided in the second valve seat base 120b are defined as the second rodless cavity oil passage 121b and the second rod cavity oil passage 122b. The end face or outer peripheral surface of the second valve seat base 120b is provided with a second rodless cavity interface 123b communicating with the second rodless cavity oil passage 121b and a second rod cavity interface 124b communicating with the second rod cavity oil passage 122b.

[0051] The second rodless chamber oil passage 121b is connected to the rodless chamber 102 via the second external oil pipe 125b located outside the cylinder 130. The second rod chamber oil passage 122b is directly connected to the rod chamber 101 (directly connected along the axial direction, without the need for external pipelines). The second rodless chamber oil passage 121b and the second rod chamber oil passage 122b are respectively provided with balance control valve cores 110.

[0052] Optionally, the external oil pipe can be a hollow steel pipe or a flexible hose.

[0053] In some embodiments, both the cylinder 130 and the second valve seat base 120b are cylindrical, and the outer diameters of the cylinder 130 and the second valve seat base 120b may be equal or unequal.

[0054] Please see Figure 6 In some embodiments, the second valve seat base 120b is inserted into the top of the cylinder 130, and a sealing element is provided between the second valve seat base 120b and the cylinder 130 for sealing engagement.

[0055] Please see Figure 7 In other embodiments, the cylinder 130 and the second valve seat base 120b are integral structures (integral processing and forming), or the cylinder 130 and the second valve seat base 120b are welded together as one unit.

[0056] This embodiment also provides a telescopic boom assembly that can be applied to construction machinery. The telescopic boom assembly includes a basic boom 300, a plurality of telescopic segment booms 400, and a cylinder module according to the above embodiment.

[0057] One end of the hydraulic cylinder module (which can be one end of the balance valve integrated cylinder 100 or one end of the piston assembly 200) is mounted on the basic arm 300, and the other end is used to drive the telescopic arm 400 to extend or retract.

[0058] In this embodiment, the balance control valve cores 110 corresponding to the second rodless chamber oil passage 121b and the second rod chamber oil passage 122b are both in a one-way normally closed state. That is, when the hydraulic oil pressure at the second rodless chamber interface 123b and the second rod chamber interface 124b is greater than the pressure at the rod chamber 101 and the rodless chamber 102, the hydraulic oil can directly enter the rod chamber 101 and the rodless chamber 102 through the balance control valve core 110. However, the hydraulic oil in the rodless chamber 102 and the rod chamber 101 can only return through the corresponding second rodless chamber interface 123b and the second rod chamber interface 124b after the corresponding balance control valve core 110 is opened under the corresponding working state.

[0059] Therefore, such as Figure 3 As shown, this embodiment takes the example of one end of the balance valve integrated cylinder body 100 of the hydraulic cylinder module being installed on the basic boom 300. The detailed operation of the telescopic boom assembly is as follows: Please refer to the following: Figure 9 When the arm extends: oil enters the rodless chamber 102 through the second rodless chamber interface 123b corresponding to the rodless chamber 102, passes through the corresponding balance control valve core 110 and the second external oil pipe 125b, and then enters the rodless chamber 102. At the same time, the balance control valve core 110 corresponding to the rod chamber 101 opens under pressure, and the hydraulic oil in the rod chamber 101 flows out directly from the second rod chamber interface 124b through the second rod chamber oil passage 122b, thereby pushing the piston rod 210 to extend, and then pushing the telescopic arm 400 to extend.

[0060] Please refer to the following: Figure 10 When the arm retracts: oil enters through the second rod chamber interface 124b corresponding to the rod chamber 101, and directly reaches the rod chamber 101 through the second rod chamber oil passage 122b. At the same time, the balance control valve core 110 corresponding to the rodless chamber 102 opens under pressure. The hydraulic oil in the rodless chamber 102 flows out through the second external oil pipe 125b, the corresponding balance control valve core 110, and the second rodless chamber oil passage 121b from the second rodless chamber interface 123b, thereby pushing the piston rod 210 to retract, and then pushing the telescopic arm 400 to retract.

[0061] When not telescopic: The balance control valve cores 110 corresponding to the rodless chamber 102 and the rod chamber 101 are both in the closed state, that is, the hydraulic oil in the rodless chamber 102 and the rod chamber 101 will not flow out from the second rodless chamber interface 123b and the second rod chamber interface 124b corresponding to the second rodless chamber oil passage 121b and the second rod chamber oil passage 122b, thereby ensuring that the telescopic boom assembly always remains in the current state when it is not working in the non-working state.

[0062] Furthermore, this embodiment also provides a piece of construction machinery. The construction machinery includes the telescopic boom assembly provided above. The construction machinery can be selected from cranes, aerial work platforms, etc.

[0063] It should be noted that, in this application, unless otherwise stated, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0064] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A hydraulic cylinder module, characterized in that, include: The balance valve is integrated into the cylinder body (100), which has a piston chamber and an oil passage (120). and A piston assembly (200) is inserted into the piston chamber and slides and seals against the inner wall of the piston chamber. The piston assembly (200) divides the piston chamber into a rod chamber (101) and a rodless chamber (102). The integrated cylinder body (100) of the balance valve is connected to the corresponding rod chamber (101) and rodless chamber (102) through independent oil passages (120). The integrated cylinder body (100) of the balance valve is also provided with a balance control valve core (110) for each oil passage (120). The balance control valve core (110) is used to adjust the opening of the oil passage (120) according to the pressure difference in the corresponding oil passage (120).

2. The hydraulic cylinder module according to claim 1, characterized in that, The integrated cylinder body (100) of the balance valve also includes a first valve seat base (120a) and a cylinder (130). The cylinder (130) has the piston chamber, the cylinder (130) includes a bottom end located in the axial direction of the piston chamber and an opposite top end, the top end having a shaft hole through which the piston rod (210) in the piston assembly (200) passes; The first valve seat base (120a) is disposed at the bottom end of the cylinder (130), and the first valve seat base (120a) is provided with two independent oil passages (120). Two balance control valve cores (110) are provided, and the two balance control valve cores (110) are provided on the first valve seat base (120a). The control ends of the balance control valve cores (110) extend into the corresponding oil passages (120).

3. The hydraulic cylinder module according to claim 2, characterized in that, The independent oil passages (120) provided in the first valve seat base (120a) are respectively the first rodless cavity oil passage (121a) and the first rod cavity oil passage (122a). The end face or outer peripheral surface of the first valve seat base (120a) is provided with a first rodless cavity interface (123a) communicating with the first rodless cavity oil passage (121a) and a first rod cavity interface (124a) communicating with the first rod cavity oil passage (122a). The first rodless chamber oil passage (121a) is directly connected to the rodless chamber (102), and the first rod chamber oil passage (122a) is connected to the rod chamber (101) through a first external oil pipe (125a) located outside the cylinder (130). The first rodless chamber oil passage (121a) and the first rod chamber oil passage (122a) are respectively provided with the balance control valve core (110).

4. The hydraulic cylinder module according to claim 2, characterized in that, Both the cylindrical body (130) and the first valve seat base (120a) are cylindrical in shape, and the outer diameters of the cylindrical body (130) and the first valve seat base (120a) are the same.

5. The hydraulic cylinder module according to any one of claims 2-4, characterized in that, The cylinder (130) and the first valve seat base (120a) are an integral structure, or the cylinder (130) and the first valve seat base (120a) are welded together as an integral structure.

6. The hydraulic cylinder module according to claim 1, characterized in that, The integrated cylinder body (100) of the balance valve also includes a second valve seat base (120b) and a cylinder body (130). The cylinder (130) has the piston chamber, and the cylinder (130) includes a bottom end located in the axial direction of the piston chamber and an opposite top end; The second valve seat base (120b) is disposed at the top end of the cylinder (130), and the second valve seat base (120b) is provided with a shaft hole through which the piston rod (210) in the piston assembly (200) passes and two independent oil passages (120). Two balance control valve cores (110) are provided, and the two balance control valve cores (110) are provided on the second valve seat base (120b). The control ends of the balance control valve cores (110) extend into the corresponding oil passages (120).

7. The hydraulic cylinder module according to claim 6, characterized in that, The independent oil passages (120) provided in the second valve seat base (120b) are a second rodless cavity oil passage (121b) and a second rod cavity oil passage (122b). The end face or outer peripheral surface of the second valve seat base (120b) is provided with a second rodless cavity interface (123b) communicating with the second rodless cavity oil passage (121b) and a second rod cavity interface (124b) communicating with the second rod cavity oil passage (122b). The second rodless chamber oil passage (121b) is connected to the rodless chamber (102) through a second external oil pipe (125b) located outside the cylinder (130), and the second rod chamber oil passage (122b) is directly connected to the rod chamber (101). The second rodless chamber oil passage (121b) and the second rod chamber oil passage (122b) are respectively provided with the balance control valve core (110).

8. The hydraulic cylinder module according to claim 6 or 7, characterized in that, The inner wall of the shaft hole of the second valve seat base (120b) is provided with a dynamic seal, which is dynamically sealed to the piston rod (210) in the piston assembly (200); or, the cylinder (130) and the second valve seat base (120b) are an integral structure; or, the cylinder (130) and the second valve seat base (120b) are welded together as an integral structure.

9. A telescopic boom assembly, characterized in that, It includes a basic arm (300), a plurality of telescopic arms (400), and a cylinder module according to any one of claims 1-8; One end of the hydraulic cylinder module is mounted on the basic arm (300), and the other end is used to drive the telescopic arm (400) to extend or retract.

10. An engineering machinery, characterized in that, Includes the telescopic boom assembly according to claim 9.

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