Hydraulic valve block fixing structure

Abstract

The utility model discloses a hydraulic valve block fixing structure which comprises a hydraulic valve block and a fixing plate used for installing the hydraulic valve block, an installing hole is formed in the fixing plate in a penetrating mode, a connector is installed in the installing hole, and the two ends of the connector extend out of the installing hole respectively. One end of the connector is in threaded connection with a tightening nut located on one side of the fixing plate, and the other end of the connector is in threaded connection with the hydraulic valve block. According to the utility model, the mounting space of the hydraulic valve block is expanded, and the mounting stability of the hydraulic valve block is ensured, so that the oil return system of the excavator has a better fixing and supporting effect, the space is effectively saved, and the mounting cost of the hydraulic valve block is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the installation of hydraulic valve block, in particular to a hydraulic valve block fixing structure. BACKGROUND

[0002] With the continuous development of engineering construction, excavators are increasingly widely used in the field of mining and infrastructure, and the hydraulic system is a key part of the excavator, which controls the direction, flow and pressure of hydraulic oil through various hydraulic valve blocks, so the reliability of each hydraulic valve block directly affects the reliability of the excavator, and the reliability of the fixing method is particularly important.

[0003] The fixing of the commonly used hydraulic valve block is usually to leave a fixing threaded hole on the hydraulic valve block, and to fix it on the fixing plate of the corresponding mechanical hydraulic valve block mounting seat with a screw or a bolt.

[0004] In the hydraulic valve block assembly process of the excavator hydraulic system, due to the limited space for fixing the hydraulic valve block on the fixing plate, when the threaded hole is a blind hole, the bolt installation depth is insufficient, which cannot meet the hydraulic valve block fixing requirements, so that the hydraulic valve block is not installed firmly, and when the threaded hole is a through hole, the sealing cannot be guaranteed, which affects the oil stability, and further causes the excavator hydraulic system to be unable to operate normally. SUMMARY

[0005] The technical problem to be solved by the utility model is that, in view of the limited space for fixing the hydraulic valve block on the existing excavator, and the hidden danger that part of the hole position is not installed firmly or the installation cannot guarantee the sealing to affect the stability of the hydraulic oil pipeline, the utility model provides a hydraulic valve block fixing structure to realize stable installation and sealing reliability of the hydraulic valve block.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A hydraulic valve block fixing structure, comprising a hydraulic valve block and a fixing plate for installing the hydraulic valve block, an installation hole is provided through the fixing plate, a connecting joint is installed in the installation hole, and the two ends of the connecting joint respectively extend out of the installation hole, one end of the connecting joint is screwed with a tightening nut on one side of the fixing plate, and the other end is screwed with the hydraulic valve block.

[0008] In use, the connecting joint of the utility model is connected with the installation hole on the original hydraulic valve block fixing plate, so as to not only expand the hydraulic valve block installation space, but also, when the bolt installation depth requirement cannot be met in some hole positions, to change these hole positions into through holes, insert the connecting joint of the utility model, and use the connecting joint of the utility model as an adapter to realize stable installation of the hydraulic valve block. In addition, the utility model uses the connecting joint to realize the installation of the hydraulic valve block, which can guarantee the sealing and will not affect the oil stability of the hydraulic valve block.

[0009] Preferably, a first oil passage is arranged on the connecting joint, and a first sealing washer is arranged between the hydraulic valve block and the connecting joint, so that the utility model can be used as a passage for connecting the hydraulic valve block and the hydraulic pipeline.

[0010] Preferably, a second oil passage for connecting the first oil passage and the hydraulic source is arranged in the tightening nut, and a hydraulic pipe connecting interface is arranged on the tightening nut, and a second sealing washer is arranged between the connecting joint and the tightening nut.

[0011] Preferably, the connecting joint is of a solid structure, so as to be used as a plug when needed.

[0012] Preferably, the proximal end of the fixed plate of the tightening nut is arranged in an external hexagonal shape, so as to facilitate the fastening of the tightening nut.

[0013] Preferably, a sealing cap is arranged in the middle of the connecting joint, and the sealing cap is arranged in an external hexagonal shape, so as to further ensure the sealing between the connecting joint and the hydraulic valve block.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1) The utility model is based on threaded connection and fixation, and a tightening nut and a connecting joint suitable for fixing the hydraulic valve block are designed, so that the installation space of the hydraulic valve block is expanded, the installation stability of the hydraulic valve block is ensured, the excavator oil return system has better fixing and supporting effect, the space is effectively saved, and the installation cost of the hydraulic valve block is saved.

[0016] 2) The utility model ensures the sealing reliability through the use of the first and second sealing washers.

[0017] 3) The connecting joint of the utility model does not affect the stability of the hydraulic system and does not occupy limited space. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 It is a general assembly schematic view of the first embodiment of the utility model.

[0020] Figure 2 It is a general assembly schematic view of the second embodiment of the utility model. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with specific preferred embodiments, but it does not limit the protection scope of the utility model.

[0022] In the description of the utility model, it should be pointed out that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The terms "first", "second" and "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] Please refer to Figure 1 The first embodiment of the hydraulic valve block fixing structure of the utility model comprises a hydraulic valve block 5 and a fixing plate 3 for mounting the hydraulic valve block 5, an installation hole 31 is provided through the fixing plate 3, a connecting joint 6 is mounted in the installation hole 31, both ends of the connecting joint 6 respectively extend out of the installation hole 31, one end of the connecting joint 6 is screwed with a tightening nut 2 located on one side of the fixing plate 3, and the other end is screwed with the hydraulic valve block 5.

[0025] A first oil passage 61 is arranged in the radial middle part of the connecting joint 6, and a first sealing washer 4 is arranged between the hydraulic valve block 5 and the connecting joint 6, so that the utility model can also serve as a passage for connecting the hydraulic valve block 5 and the hydraulic pipeline.

[0026] A second oil passage 21 for connecting the first oil passage 61 and the hydraulic pipeline is arranged in the tightening nut 2, and a hydraulic pipe connecting interface 22 is arranged on the tightening nut 2, and a second sealing washer 1 is arranged between the connecting joint 6 and the tightening nut 2.

[0027] The proximal end of the tightening nut 2 to the fixing plate is provided with an outer hexagonal shape 23, so as to facilitate the fastening of the tightening nut 2.

[0028] A sealing cap 62 is provided at the axial center of the connecting joint 6, and the sealing cap 62 is set in an external hexagonal shape to facilitate the tightening and sealing of the connecting joint 6.

[0029] Preferably, the first sealing gasket 4 and the second sealing gasket 1 are O-rings.

[0030] In use, the hydraulic valve block 5 is connected to one end of the connecting joint 6 by a thread and sealed by the first sealing ring 4. The hydraulic valve block 5 is fixed to the fixing plate 3 by tightening the nut 2, and the hydraulic pipe connection interface 22 of the tightened nut 2 is connected to the hydraulic pipeline to form a complete oil supply passage. The hydraulic oil of the hydraulic valve block 5 is connected to the external hydraulic pipeline through the first oil passage 61 and the second oil passage 21.

[0031] In this embodiment, the outermost surface of the connector 6 is set as a smooth surface, and a sealing groove is provided on the smooth surface. A second sealing washer 1 is installed in the sealing groove. The corresponding part of the tightening nut 2 is also set as a smooth surface to ensure the seal between the connector 6 and the tightening nut 2.

[0032] like Figure 2 As shown, the second embodiment of the hydraulic valve block fixing structure of this utility model is roughly the same as the first embodiment, except that the connecting joint 6 is a solid structure and the tightening nut 2 is a common external hexagonal nut. When needed, this utility model can be used as a plug to achieve the effect of fixing and sealing.

[0033] It should be noted that, in this utility model, the sealing cap 62 may not be used on the connecting joint 6. Instead, the first sealing ring 4 can be installed in the groove of the fixing plate 3 for sealing. This can also achieve the effect of sealing the hydraulic oil in the hydraulic valve block 5. However, this structure is not suitable for the installation and fixing of multiple mounting plates. Alternatively, the first sealing ring 4 can be installed directly in the groove of the hydraulic valve block 5 for sealing. Obviously, the sealing structure of this utility model is simple and has wide adaptability.

[0034] The selection of the first sealing gasket 4 and the second sealing gasket 1 of this utility model can also be diversified. Various forms such as ED ring sealing, metal surface sealing, tapered tooth sealing, and threaded adhesive sealing can be used to replace O-ring sealing.

[0035] The tightening nut 2 of this utility model can also take various forms. For example, the hydraulic pipe connection interface 22 with an external thread at one end of the tightening nut 2 can be designed as a hydraulic pipe connection interface 22 with an internal thread. Alternatively, it can be directly connected to a straight or tee-type transition joint and then connected to various forms of hydraulic pipe joints to achieve the connection of multiple hydraulic pipes, thereby achieving the purpose of multi-pipeline oil transportation.

[0036] The above merely describes specific implementation of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art, without departing from the scope of the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application by using the disclosed technical content, or modify equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application shall fall within the scope of protection of the technical scheme of the present application.

Claims

1. A hydraulic valve block fixing structure comprising a hydraulic valve block and a fixing plate for mounting the hydraulic valve block, characterized by: The mounting hole is arranged through the fixing plate, a connecting joint is mounted in the mounting hole, and two ends of the connecting joint respectively extend out of the mounting hole, one end of the connecting joint is in threaded connection with a tightening nut located at one side of the fixing plate, and the other end is in threaded connection with the hydraulic valve block.

2. The hydraulic valve block securing structure of claim 1, wherein A first oil passage is arranged on the connecting joint, and a first sealing washer is mounted between the hydraulic valve block and the connecting joint.

3. The hydraulic valve block securing structure of claim 2, wherein A second oil passage for connecting the first oil passage and a hydraulic source is arranged in the tightening nut, a hydraulic pipe connecting interface is arranged on the tightening nut, and a second sealing washer is mounted between the connecting joint and the tightening nut.

4. The hydraulic valve block securing structure of claim 1, wherein The connecting joint is in solid structure.

5. The hydraulic valve block fixation structure according to any one of claims 1 to 4, characterized in that, The proximal end of the tightening nut to the fixing plate is in hexagonal shape.

6. The hydraulic valve block fixation structure according to any one of claims 1 to 4, characterized in that, A sealing cap is arranged in the middle of the connecting joint, and the sealing cap is in hexagonal shape.

Images