Hydraulic auxiliary valve of excavator

Abstract

The utility model discloses a hydraulic auxiliary valve of an excavator, relates to the technical field of hydraulic valves of excavators, and solves the problems that in the process of disassembling and assembling an auxiliary valve main body, a wrench needs to be taken down by a rotation angle for many times to rotate the auxiliary overflow valve, so that the steps are tedious and the operation is relatively inconvenient when the auxiliary overflow valve is disassembled and assembled. The outer side of the auxiliary valve body is fixedly sleeved with a baffle ring, the outer side of the auxiliary valve body is movably sleeved with a rotating structure used for rotating the auxiliary valve body and located at the upper end of the baffle ring, and the outer side of the auxiliary valve body is further sleeved with a limiting ring in a threaded mode and located on the upper side of the rotating structure. By installing the rotating structure, the lantern ring can be rotated after the auxiliary valve main body is rotated by a certain angle through the rotating structure, so that the auxiliary valve main body can be continuously rotated, the operation is simple and convenient, the auxiliary valve main body can be quickly disassembled and assembled, and when the lantern ring is rotated, a tool cannot be easily separated from the embedded pipe; and the continuity of the rotating auxiliary valve main body can be effectively enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valves for excavators, and specifically relates to a hydraulic sub-valve for an excavator. Background Technique

[0002] The hydraulic sub-valve of an excavator is also called a sub-overflow valve. The sub-overflow valve of an excavator is another important component in the hydraulic system of the excavator, and it plays a role in preventing damage to the hydraulic system. When the main overflow valve fails or malfunctions, the sub-overflow valve will automatically open to avoid damage to the hydraulic system due to excessive pressure.

[0003] In the prior art, since most of the actions of the excavator rely on hydraulic drive, there are a large number of hydraulic pipelines at the installation position of the distribution valve of the excavator, and the distribution is relatively complex. When the sub-overflow valve of the excavator is damaged and needs to be replaced, since the sub-overflow valve is installed on the distribution valve of the excavator through threads, a wrench is required to disassemble the sub-overflow valve from the distribution valve of the excavator. However, the wrench will be blocked by the pipelines during the rotation of the sub-overflow valve and cannot continue to rotate. It is necessary to remove the wrench and rotate the sub-overflow valve by a certain angle multiple times, resulting in cumbersome steps and inconvenient operation during the disassembly and assembly of the sub-overflow valve. Content of the Utility Model

[0004] The purpose of the utility model is to provide a hydraulic sub-valve for an excavator that is convenient for disassembly and assembly, and can solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A hydraulic sub-valve for an excavator, including a sub-valve main body, a retaining ring is fixedly sleeved on the outer side of the sub-valve main body, a rotating structure for rotating the sub-valve main body is movably sleeved on the outer side of the sub-valve main body above the retaining ring, a limiting ring is also threadedly sleeved on the outer side of the sub-valve main body above the rotating structure, and a plurality of first convex blocks evenly distributed in a circumferential manner are fixedly embedded inside the rotating structure on the outer side of the sub-valve main body.

[0006] Preferably, the rotating structure includes a collar movably sleeved on the outer side of the sub-valve main body, and the collar is located between the retaining ring and the limiting ring, and both ends of the collar are in movable contact with the retaining ring and the limiting ring respectively.

[0007] Preferably, an embedded pipe is fixedly embedded on the outer side of the collar. The inner diameter of one end of the embedded pipe close to the sub-valve main body is smaller than the inner diameter of the end far from the sub-valve main body, and a movable pressing piece is movably embedded inside the embedded pipe.

[0008] Preferably, a plurality of limiting blocks evenly distributed in a circumferential manner are fixedly connected to the outer side of the pressing piece, and the limiting blocks are in movable contact with the embedded pipe through limiting straight grooves. The limiting blocks being embedded in the limiting straight grooves can prevent the pressing piece from rotating.

[0009] Preferably, a connecting column is fixedly embedded at the center of one side of the pressing sheet close to the auxiliary valve body, and a second protrusion is fixedly embedded at one end of the connecting column away from the pressing sheet, and the second protrusion can be driven to move by the pressing sheet.

[0010] Preferably, a spring is movably sleeved on the outer side of the connecting column, and two ends of the spring are movably abutted against the embedded tube and the pressing sheet respectively, and the spring can drive the protrusion to move back.

[0011] Preferably, the inner diameter of the upper end of the collar is smaller than the inner diameter of the lower end of the collar, the second protrusion can be inserted between two adjacent first protrusions, and the inner wall of the upper end of the collar is movably fitted with the outer wall of the auxiliary valve body.

[0012] Preferably, a magnetic sheet is fixedly embedded in the center of one side of the pressing sheet away from the connecting column, and the magnetic sheet can absorb the tool and fit the pressing sheet.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model installs a rotating structure, and the second protrusion in the rotating structure can move inside the collar, so that after the auxiliary valve body is rotated to a certain angle by the rotating structure, the collar can be rotated, thereby continuously rotating the auxiliary valve body. The operation is simple and convenient, and the auxiliary valve body can be quickly disassembled and assembled.

[0015] 2. The utility model fixes and embeds a magnetic sheet on the pressing sheet so that when the collar is rotated, the tool will not be easily separated from the embedded tube, which can effectively enhance the continuity of the rotating auxiliary valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the utility model product;

[0018] Figure 3 It is a schematic diagram of the side section of the rotating structure of the utility model and its separation from the auxiliary valve body;

[0019] Figure 4 This is a schematic diagram of the splitting of the rotating structure and the auxiliary valve body of the utility model;

[0020] Figure 5 For this utility model Figure 3 Schematic diagram of the splitting of A;

[0021] Figure 6 For this utility model Figure 3 A is an enlarged schematic diagram.

[0022] In the figure: 1. Pilot valve body; 2. Retaining ring; 3. Rotating structure; 301. Collar; 302. Inserted pipe; 303. Pressing piece; 304. Limiting block; 305. Connecting column; 306. Second convex block; 307. Spring; 4. Limiting ring; 5. First convex block; 6. Magnetic sheet. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment 1

[0025] Please refer to Figure 1 、 Figure 2 、 Figure 3 As shown in the figure, a hydraulic pilot valve of an excavator includes a pilot valve body 1. A retaining ring 2 is fixedly sleeved on the outer side of the pilot valve body 1. A rotating structure 3 for rotating the pilot valve body 1 is movably sleeved on the outer side of the pilot valve body 1 above the retaining ring 2. A limiting ring 4 is also threadedly sleeved on the outer side of the pilot valve body 1 above the rotating structure 3. A plurality of first convex blocks 5 distributed at equal circumferential intervals are fixedly embedded inside the rotating structure 3 on the outer side of the pilot valve body 1.

[0026] Please refer to Figure 3 As shown in the figure, the rotating structure 3 includes a collar 301 movably sleeved on the outer side of the pilot valve body 1, and the collar 301 is located between the retaining ring 2 and the limiting ring 4. The two ends of the collar 301 are respectively in movable contact with the retaining ring 2 and the limiting ring 4.

[0027] Please refer to Figure 5 As shown in the figure, an inserted pipe 302 is fixedly embedded on the outer side of the collar 301. The inner diameter of one end of the inserted pipe 302 close to the pilot valve body 1 is smaller than that of the end far from the pilot valve body 1. A movable pressing piece 303 is movably embedded inside the inserted pipe 302. A plurality of limiting blocks 304 distributed at equal circumferential intervals are fixedly connected to the outer side of the pressing piece 303, and the limiting blocks 304 are in movable contact with the inserted pipe 302 through limiting straight grooves. The limiting blocks 304 being embedded in the limiting straight grooves can prevent the pressing piece 303 from rotating.

[0028] Please refer to Figure 5A connecting column 305 is fixedly embedded at the center of one side of the pressing piece 303 close to the auxiliary valve body 1, and a second protrusion 306 is fixedly embedded at the end of the connecting column 305 away from the pressing piece 303. The second protrusion 306 can be driven to move by the pressing piece 303. A spring 307 is movably sleeved on the outer side of the connecting column 305, and the two ends of the spring 307 are movably abutted against the embedded tube 302 and the pressing piece 303 respectively, and the spring 307 can drive the second protrusion 306 to move back.

[0029] See also Figure 3 The inner diameter of the upper end of the collar 301 is smaller than the inner diameter of the lower end of the collar 301 , the second protrusion 306 can be inserted between two adjacent protrusions 1 5 , and the inner wall of the upper end of the collar 301 is movably fitted with the outer wall of the auxiliary valve body 1 .

[0030] The working principle of the excavator auxiliary valve for convenient disassembly and assembly: when disassembling and assembling the auxiliary valve body 1, the personnel inserts the round rod-shaped tool into the embedded tube 302, presses the pressing plate 303 with the tool, so that the second protrusion 306 is inserted between the two adjacent protrusions 1 5, and then rotates the collar 301 while pressing the pressing plate 303. Since the second protrusion 306 is inserted between the two protrusions 1 5, the auxiliary valve body 1 can rotate with the collar 301. When the tool is blocked by the pipeline during rotation, the personnel removes the force acting on the tool. At this time, the second protrusion 306 will be moved out from between the two protrusions 1 5 driven by the spring 307. At this time, the personnel can hold the tool loosely to rotate the collar 301. After the collar 301 rotates, the second protrusion 306 is pressed between the two adjacent protrusions 1 5 to rotate the auxiliary valve body 1. The auxiliary valve body 1 can be rotated continuously, the operation is simple and convenient, and the auxiliary valve body 1 can be quickly disassembled and assembled.

[0031] Embodiment 2

[0032] See also Figure 6 This embodiment further illustrates the first embodiment. A magnetic sheet 6 is fixedly embedded in the center of the side of the pressing sheet 303 away from the connecting column 305 . The magnetic sheet 6 can absorb the tool and the pressing sheet 303 to form a fit.

[0033] In this embodiment, after the round rod-shaped tool is inserted into the embedded tube 302 , the magnetic sheet 6 on the pressing sheet 303 will absorb the metal round rod, so that when the ring 301 is rotated, the tool will not easily fall off the embedded tube 302 , which can effectively enhance the continuity of the rotating auxiliary valve body 1 .

[0034] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" - "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process - method - article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process - method - article or device.

[0035] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic auxiliary valve for an excavator, comprising an auxiliary valve body (1), characterized in that: The outer side of the auxiliary valve body (1) is fixedly sleeved with a retaining ring (2); the outer side of the auxiliary valve body (1) is located on the upper end of the retaining ring (2) and is movably sleeved with a rotating structure (3) for rotating the auxiliary valve body (1); the outer side of the auxiliary valve body (1) is located on the upper side of the rotating structure (3) and is also threadedly sleeved with a limiting ring (4); the outer side of the auxiliary valve body (1) is located inside the rotating structure (3) and is fixedly embedded with a plurality of convex blocks (5) distributed equidistantly around the circumference.

2. The hydraulic auxiliary valve of an excavator according to claim 1, characterized in that: The rotating structure (3) comprises a collar (301) movably sleeved on the outside of the auxiliary valve body (1), and the collar (301) is located between the retaining ring (2) and the limiting ring (4).

3. The hydraulic auxiliary valve of an excavator according to claim 2, characterized in that: An embedded tube (302) is fixedly embedded on the outer side of the sleeve ring (301), and a movable pressing sheet (303) is movably embedded inside the embedded tube (302).

4. The hydraulic auxiliary valve of an excavator according to claim 3, characterized in that: A plurality of circumferentially equidistantly distributed limiting blocks (304) are fixedly connected to the outer side of the pressing plate (303), and the limiting blocks (304) are in active contact with the embedded tube (302) via limiting straight grooves.

5. The hydraulic auxiliary valve of an excavator according to claim 3, characterized in that: A connecting column (305) is fixedly embedded in the center of one side of the pressing sheet (303) close to the auxiliary valve body (1), and a second protrusion (306) is fixedly embedded in the end of the connecting column (305) away from the pressing sheet (303).

6. The hydraulic auxiliary valve of an excavator according to claim 5, characterized in that: A spring (307) is movably sleeved on the outer side of the connecting column (305), and two ends of the spring (307) are movably abutted against the embedded tube (302) and the pressing sheet (303) respectively.

7. The hydraulic auxiliary valve of an excavator according to claim 5, characterized in that: The inner diameter of the upper end of the collar (301) is smaller than the inner diameter of the lower end of the collar (301), and the second protrusion (306) can be inserted between two adjacent first protrusions (5).

8. The hydraulic auxiliary valve of an excavator according to claim 5, characterized in that: A magnetic attraction sheet (6) is fixedly embedded at the center of one side of the pressing sheet (303) away from the connecting column (305).

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