Pilot oil inlet and return integrated block for excavator
By adopting four-way through-plate metric joints and lock nut design, the problems of low assembly efficiency and high cost of traditional pilot oil return integrated blocks are solved, and more efficient installation and reduced joint count are achieved, and the assembly process is simplified.
Patent Information
- Application Number
- CN202421101638.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The traditional double quad-way English oil port type pilot oil return integrated block requires a large number of English to metric joints and metric joints during installation, resulting in low assembly efficiency, high production time cost and high manufacturing cost.
Using four-way through-plate metric joints, the fixed connection between the cross-type intermediate block and the cylindrical joints is combined with the lock nut and boss design, which simplifies the structure and reduces the number of joints, realizing direct connection of the oil inlet and oil outlet pipelines .
It greatly reduces installation time and cost, improves assembly efficiency, reduces the number of joints, and simplifies the assembly process.
Smart Images
Figure CN222295135U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of engineering machinery, in particular to a pilot oil inlet and return integrated block for an excavator. Background Art
[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.
[0003] At present, the traditional pilot oil return manifold block used in a certain engineering machinery 20T excavator is a double four-way British oil port transition block, such as Figure 1 As shown, this transition block is installed on a mounting plate with corresponding threads by bolts on the rear side. A plurality of oil inlets are arranged on the left side of the transition block body, and a plurality of oil outlets are arranged on the right side and the front side. Each oil inlet is connected to three oil outlets, which can effectively bring together scattered hydraulic oil circuits.
[0004] However, for this kind of double four-way English oil port transition block, both the oil inlet and the oil outlet need to be installed with English-to-metric joints first, and then with metric joints, and finally with metric joints to connect the corresponding oil inlet and outlet pipes. During installation and use, a large number of English-to-metric joints and metric joints are needed to complete the assembly, which not only reduces assembly efficiency and increases production time costs, but also increases manufacturing costs due to the large number of joints used. Utility Model Content
[0005] In view of the above problems, the utility model provides a pilot oil inlet and return integrated block for an excavator, which uses a four-way through-plate joint to simplify the structure of the integrated block while meeting the use requirements, can save a large number of joints, reduce installation time and manufacturing costs, and improve assembly efficiency.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A pilot oil return integrated block for an excavator comprises a cross-shaped four-way through-plate metric joint, wherein the longest joint A in the four-way through-plate metric joint passes through a first hole of a mounting plate and is mounted on the mounting plate through a locking nut.
[0008] Preferably, the four-way through-plate metric joint is composed of four cylindrical metric joints A, B, C, and D and a cross-shaped intermediate block; wherein the A joint is the oil inlet, and B, C, and D are all oil outlets; the four cylindrical joints A, B, C, and D are integrally fixedly connected to the cross-shaped intermediate block.
[0009] Preferably, the lengths of the B, C, and D connectors are consistent.
[0010] Preferably, the four joints A, B, C, and D are all hollow cylindrical joints, and the inner wall diameters of the four joints A, B, C, and D are consistent; the four joints A, B, C, and D are arranged on the cross-shaped middle block 11 in a cross-shaped distribution; the inside of the cross-shaped middle block 11 also has a cross-shaped channel consistent with the inner diameter of the ABCD joint.
[0011] Preferably, the outer walls of the four joints A, B, C, and D are all provided with external threads for connecting with oil inlet and outlet pipelines with internal threads, and the internal threads of the pipelines are matched with the external threads for use.
[0012] Preferably, a boss is fixedly provided at the position where the cross-shaped intermediate block is connected to the A joint.
[0013] Preferably, the internal thread of the locking nut and the external thread of the A connector can also be matched for use.
[0014] Preferably, the mounting plate is provided with a plurality of first holes of the same size, and there are no less than two first holes. The diameter of the first holes is just large enough for the A connector to pass through, and there is a certain gap between the two first holes.
[0015] Preferably, after the longest joint A in the four-way through-plate metric joint passes through the first hole of the mounting plate, when the boss is close to the mounting plate, the locking nut is tightened in the direction of the cross-shaped middle block to lock the four-way through-plate metric joint on the mounting plate; the oil inlet and outlet pipelines are connected to the corresponding joints of the four-way through-plate metric joint.
[0016] Compared with the prior art, the utility model has the following advantages and positive effects:
[0017] The utility model fixes an oil inlet and three oil inlet metric joints with a cross-shaped hollow middle block to form a four-way through-plate metric joint, and a boss is arranged at the position where the oil inlet is connected to the middle block, so that the longest oil inlet joint passes through the first hole of the mounting plate, the boss is tightly attached to the mounting plate, and the locking nut is tightened in the direction of the cross-shaped middle block, and a plurality of four-way through-plate metric joints are locked on the mounting plate to form a novel pilot inlet and return oil integrated block with metric joints, thereby overcoming the technical problems of a traditional double four-way English oil port transition block, first installing an English-to-metric joint and then installing a metric joint, low assembly efficiency, high production time cost, and high manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0019] Figure 1 It is a schematic diagram of a pilot oil return integrated block in the prior art;
[0020] Figure 2 It is an overall schematic diagram of an embodiment of the utility model;
[0021] Figure 3 It is a partial cross-sectional schematic diagram of a four-way plate-through metric joint according to an embodiment of the utility model;
[0022] In the figure:
[0023] 1-Four-way through-plate metric connector, A-oil inlet, B, C, D-oil outlet, 11-cross-shaped intermediate block, 12-boss, 2-mounting plate, 21-first hole, 3-locking nut. DETAILED DESCRIPTION
[0024] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0025] The utility model is described in detail below in conjunction with the accompanying drawings. The present embodiment discloses a pilot oil return integrated block for an excavator, such as Figure 2 As shown, it includes two cross-shaped four-way plate-through metric joints 1. The longest joint A in the four-way plate-through metric joint 1 passes through the first hole 21 of the mounting plate 2 and is installed on the mounting plate 2 through the locking nut 3.
[0026] like Figure 2 As shown, a bend plate is fixedly connected to the top of the mounting plate 2, and the bend plate is used to install the mounting plate 2 with the four-way plate-through metric connector installed on the corresponding position of the excavator. Two first holes 21 of the same size are provided on the mounting plate 2. The diameter of the first hole 21 is just enough to allow the A connector to pass through. There is a certain gap between the two first holes 21 to ensure that the staff can have enough operating space when installing two four-way plate-through metric connectors 1 and installing the oil inlet and outlet pipelines on the corresponding four-way plate-through metric connectors 1. Figure 2 As shown, the centers of the two first holes 21 are located on the same straight line, and the straight line connecting the centers of the two first holes 21 is parallel to the vertical side of the mounting plate 2 .
[0027] like Figure 3As shown, the four-way through-plate metric joint 1 is composed of four cylindrical metric joints A, B, C, and D and a cross-shaped middle block 11; wherein the A joint is the oil inlet, and the B, C, and D joints are all oil outlets. The four cylindrical joints A, B, C, and D are integrally fixedly connected with the cross-shaped middle block 11, wherein the length of the A cylindrical joint is the longest, and the lengths of the B, C, and D joints are the same.
[0028] like Figure 3 As shown, the four joints A, B, C, and D are all hollow cylindrical joints, and the inner wall diameters of the four joints A, B, C, and D are consistent; the four joints A, B, C, and D are arranged on the cross-shaped middle block 11 in a cross-shaped distribution; the inside of the cross-shaped middle block 11 also has a cross-shaped channel consistent with the inner diameter of the joints A, B, C, and D; the outer walls of the four joints A, B, C, and D are all provided with external threads for connection with corresponding pipelines. The corresponding pipelines include an oil inlet pipeline and an oil outlet pipeline with internal thread joints, and the internal thread joints of the oil inlet pipeline and the oil outlet pipeline match the external threads of the four joints A, B, C, and D, so that when installing the oil circuit, it is only necessary to tighten the internal thread joints of the oil inlet pipeline and the oil outlet pipeline toward the corresponding joint external threads.
[0029] It can be understood that the external threads of the four connectors A, B, C, and D all meet the requirements of metric connectors.
[0030] like Figure 3 As shown, a boss 12 is fixedly provided at the position where the cross-shaped intermediate block 11 is connected to the A joint, and the internal thread of the locking nut 3 is matched with the external thread of the A joint. When the boss 12 is pressed against one side of the mounting plate 2, the locking nut 3 is tightened toward the cross-shaped intermediate block 11, and the four-way plate-through metric joint 1 can be firmly set on the mounting plate 2.
[0031] Assembly Method:
[0032] Insert the A joint of a four-way plate-type metric connector 1 through one of the first holes 21 on the mounting plate 2. When the boss 12 of the four-way plate-type metric connector 1 is tightly attached to the mounting plate 2, tighten the locking nut 3 toward the cross-shaped middle block 11, thereby locking the four-way plate-type metric connector 1 on the mounting plate 2. Install another four-way plate-type metric connector 1 on the mounting plate 2 in the same way.
[0033] Then the existing oil inlet and outlet pipelines are connected to the corresponding joints on the four-way plate-through metric joint 1 to complete the installation of the new pilot oil inlet and return manifold, which saves time and effort while also saving a large number of joints.
[0034] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.
Claims
1. A pilot oil return manifold for an excavator, characterized in that: It comprises a cross-shaped four-way through-plate metric joint, wherein the longest joint A in the four-way through-plate metric joint passes through a first hole of a mounting plate and is mounted on the mounting plate through a locking nut.
2. The pilot oil return manifold for excavators as claimed in claim 1, characterized in that: The four-way through-plate metric joint is composed of four cylindrical metric joints A, B, C, and D and a cross-shaped intermediate block; wherein the A joint is the oil inlet, and B, C, and D are all oil outlets; the four cylindrical joints A, B, C, and D are integrally fixedly connected to the cross-shaped intermediate block; a boss is fixedly provided at the position where the cross-shaped intermediate block is connected to the A joint.
3. The pilot oil return manifold for excavators as claimed in claim 2, characterized in that: The lengths of the B, C, and D connectors are consistent.
4. The pilot oil return manifold for excavators as claimed in claim 2, characterized in that: The four joints A, B, C, and D are all hollow cylindrical joints, and the inner wall diameters of the four joints A, B, C, and D are consistent; the four joints A, B, C, and D are arranged on the cross-shaped intermediate block (11) in a cross-shaped distribution; and the inside of the cross-shaped intermediate block (11) also has a cross-shaped channel consistent with the inner diameter of the A, B, C, and D joints.
5. The pilot oil return manifold for excavators as claimed in claim 2, characterized in that: The outer walls of the four joints A, B, C, and D are all provided with external threads for connecting with oil inlet and outlet pipelines with internal threads, and the internal threads of the pipelines are matched with the external threads for use.
6. The pilot oil inlet and return manifold for excavators as claimed in claim 1, characterized in that: The internal thread of the locking nut and the external thread of the A connector can also be matched for use.
7. The pilot oil return manifold for excavators as claimed in claim 1, characterized in that: The mounting plate is provided with a plurality of first holes of the same size, the first holes are no less than two, the diameter of the first holes is just large enough for the A connector to pass through, and there is a certain gap between the two first holes.
8. The pilot oil inlet and return manifold for excavators as claimed in claim 5, characterized in that: After the longest joint A in the four-way through-plate metric joint passes through the first hole of the mounting plate, when the boss is close to the mounting plate, the locking nut is tightened in the direction of the cross-shaped middle block to lock the four-way through-plate metric joint on the mounting plate; the oil inlet pipeline and the oil outlet pipeline are connected to the corresponding joints of the four-way through-plate metric joint.