Hydraulic accessory replacement equipment of hydraulic excavator

Abstract

The invention relates to the technical field of hydraulic accessories, and discloses hydraulic accessory replacement equipment of a hydraulic excavator, which comprises an outer sleeve, an inner sleeve rod is arranged in the outer sleeve, the end part of the inner sleeve rod is in threaded connection with the input end of a filter, and one side of the outer surface of the inner sleeve rod is provided with a circulating groove communicated to the inner cavity of the inner sleeve rod; the outer surface of the inner sleeve rod is movably sleeved with an elastic scraping plate of a spiral structure, the outer surface of the elastic scraping plate makes contact with the inner wall of the outer sleeve, and a second communicating groove is formed in the right end cover. According to hydraulic accessory replacement equipment of a hydraulic excavator, an inner sleeve rod and an elastic scraper are arranged, so that when a filter and hydraulic oil are disassembled, assembled and replaced, the elastic scraper on the filter can be driven to rotate along with the rotation of the filter under the transmission action of a right end cover, and the elastic scraper can be driven to rotate along with the rotation of the filter; the inner wall of the outer sleeve and the outer surface of the inner sleeve rod are scraped, and powder impurities deposited on the outer sleeve and the outer surface of the inner sleeve rod are removed and discharged out of an inner cavity of the outer sleeve along with emptying of the hydraulic oil.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic accessories, and particularly relates to a hydraulic accessory replacement device for a hydraulic excavator. Background Art

[0002] Hydraulic accessories are important components in the structure of an excavator and serve purposes such as power transmission and stroke control during its operation. Among them, hydraulic accessories are driven and operate through hydraulic oil. As the components on the hydraulic accessories wear during operation, a large amount of powder impurities will enter the flowing hydraulic oil. Therefore, in the existing technical means, a filter needs to be arranged in the hydraulic oil tank to effectively filter out the powder impurities in the hydraulic oil. At the same time, the filter and the hydraulic oil need to be replaced regularly to prevent excessive wear of the hydraulic accessories caused by the powder impurities in them. However, the filter needs to be replaced after long-term use to prevent the filter from affecting its filtering effect on hydraulic oil due to excessive filtering and attachment of powder impurities. Moreover, the powder impurities that enter the hydraulic oil tank along with the hydraulic oil will partially precipitate at the bottom. After replacing the filter and the hydraulic oil, the powder impurities precipitated at the bottom of the hydraulic oil tank will "pollute" the hydraulic oil again, resulting in a poor effect of replacing the filter and the hydraulic oil, and it is unable to effectively avoid the serious wear of the hydraulic accessories caused by the powder impurities in the hydraulic oil, with poor stability and reliability.

[0003] Therefore, there is an urgent need for an auxiliary component for replacing the filter and the hydraulic oil in an excavator to effectively solve the above-mentioned defects existing in the replacement of the filter and the hydraulic oil in an excavator. Summary of the Invention

[0004] This application proposes a hydraulic accessory replacement device for a hydraulic excavator, which has the advantage of being able to effectively remove the powder impurities precipitated at the bottom of the hydraulic oil tank and prevent them from "polluting" the replaced filter and hydraulic oil, so as to solve the problem that the powder impurities that enter the hydraulic oil tank along with the hydraulic oil will partially precipitate at the bottom, and after replacing the filter and the hydraulic oil, the powder impurities precipitated at the bottom of the hydraulic oil tank will "pollute" the hydraulic oil again.

[0005] To achieve the above object, the present application adopts the following technical solution: A hydraulic accessory replacement device for a hydraulic excavator, including an outer sleeve. One side of the top end of the outer sleeve is fixedly installed with a first port communicating with its inner cavity, and the top end of the first port is fixedly connected to a hydraulic oil tank, so that the hydraulic oil carrying powder impurities in the hydraulic oil tank can enter the inner cavity of the outer sleeve through the first port. The other side of the top end of the outer sleeve is fixedly installed with a second port communicating with its inner cavity, and the other end of the second port is communicated with the oil supply system of the hydraulic accessory. One side of the inner wall of the outer sleeve is provided with a first communication groove, and one end of the first communication groove is communicated with the second port. An inner sleeve rod is arranged inside the outer sleeve, and the end of the inner sleeve rod is threadedly connected to the input end of the filter. One side of the outer surface of the inner sleeve rod is provided with a flow groove communicating with its inner cavity, so that the hydraulic oil flowing back into the inner cavity of the outer sleeve can be conveyed to the filter at the end of the inner sleeve rod through the flow groove. The outer surface of the inner sleeve rod is movably sleeved with an elastic scraper with a spiral structure whose outer surface is in contact with the inner wall of the outer sleeve. One side of the outer surface of the inner sleeve rod is movably sleeved with a right end cover whose end is fixedly connected to one end of the elastic scraper, and a second communication groove is opened inside the right end cover. One end of the second communication groove is communicated with the output end of the filter threadedly connected to the end of the inner sleeve rod, and the other end of the second communication groove is communicated with a third communication groove opened on the other side of the outer surface of the right end cover. Thus, the second port can be communicated with the output end of the filter through the second communication groove, the third communication groove and the first communication groove, and the hydraulic oil filtered by the filter can be conveyed to the oil supply system.

[0006] Further, after the filter is installed, the bottom end of the first communication groove is communicated with the third communication groove on the right end cover, so that the hydraulic oil filtered by the filter can be conveyed to the oil supply system communicated with the second port through the third communication groove and the first communication groove. When disassembling and replacing the filter, as the elastic scraper returns to its initial position, the positions of the first communication groove and the right end cover are staggered from each other, so that the hydraulic oil in the oil supply system can also be emptied through the inner cavity of the outer sleeve.

[0007] Further, when disassembling and replacing the filter, as the elastic scraper returns to its initial position, the end face of the right end cover protrudes from the end face of the inner sleeve rod. Thus, when installing the filter, the second communication groove on the right end cover and the output end of the filter can be aligned first, and during the process of continuously rotating and tightening the filter, the right end cover and the elastic scraper thereon can be synchronously driven to rotate, effectively improving the installation accuracy between the second communication groove on the right end cover and the output end of the filter.

[0008] Further, three groups of grooves are arranged in an annular array on the outer surface of the elastic scraper along the central axis direction of the inner sleeve rod, so that the hydraulic oil in the inner cavity of the outer sleeve can be effectively drained through the grooves, preventing some hydraulic oil from remaining in it and "polluting" the replaced hydraulic oil.

[0009] Further, the other end of the inner sleeve rod extends to the outside of the outer sleeve. A limit nut is threadedly connected to one side of the outer surface of the inner sleeve rod, and the circumferential rotation of the limit nut is restricted by a left end cover fixedly installed at the end of the outer sleeve, thereby restricting the circumferential freedom of the inner sleeve rod and preventing the inner sleeve rod from rotating synchronously during the process of rotating and tightening or disassembling the filter, resulting in the problem of inability to disassemble and assemble the filter.

[0010] Further, a conical pressing block is fixedly sleeved on one side of the outer surface of the inner sleeve rod and located in the inner cavity of the outer sleeve, and an annular connecting plate with an inner wall in frictional contact with the end face of the conical pressing block is fixedly installed at one end of the elastic scraper. Thus, the elastic scraper and the right end cover can be restricted by the conical pressing block and the annular connecting plate, preventing the right end cover and the elastic scraper on it from falling off during the process of disassembling, assembling and replacing the filter. At the same time, an elastic member is movably sleeved on one side of the outer surface of the inner sleeve rod and between the limit nut and the end face of the outer sleeve, and the relative sealing between the conical pressing block and the annular connecting plate is maintained through the elastic member, preventing the leakage of hydraulic oil.

[0011] Further, the outer sleeve and the first port are arranged at a certain angle, so that the hydraulic oil flowing back into the inner cavity of the outer sleeve through the first port can stably flow into the filter threadedly connected to the end of the inner sleeve rod. During the process of replacing the hydraulic oil, the hydraulic oil in the inner cavity of the outer sleeve can be effectively drained, preventing the hydraulic oil containing powder impurities from remaining in the inner cavity of the outer sleeve.

[0012] The beneficial effects of the present invention are as follows: A hydraulic accessory replacement device for a hydraulic excavator provided by the present application, with the settings of the inner sleeve rod and the elastic scraper, during the process of disassembling, assembling and replacing the filter and the hydraulic oil, as the filter rotates, under the driving action of the right end cover, the elastic scraper on it can be driven to rotate accordingly, thereby scraping the inner wall of the outer sleeve and the outer surface of the inner sleeve rod, and clearing the deposited powder impurities on them and discharging them from the inner cavity of the outer sleeve along with the drainage of the hydraulic oil, effectively avoiding the problem that the powder impurities deposited at the bottom of the inner cavity of the hydraulic oil tank are difficult to be cleared during the process of replacing the filter and the hydraulic oil and "polluting" the replaced filter and hydraulic oil. Brief Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings: Figure 1 Schematic structural diagram of the present invention; Figure 2 Front view of the structure of the present invention; Figure 3 Schematic structural diagram of the outer sleeve of the present invention; Figure 4 Schematic structural diagram of the inner sleeve rod of the present invention and the structure thereon; Figure 5 Structure of the present invention Figure 2 Enlarged schematic view of part A of the structure.

[0014] In the figure: 1 - outer sleeve, 2 - first port, 3 - second port, 4 - inner sleeve rod, 5 - elastic scraper, 6 - elastic member, 7 - left end cover, 8 - limit nut, 9 - first communication groove, 10 - flow groove, 11 - groove, 12 - right end cover, 13 - second communication groove, 14 - third communication groove, 15 - conical pressing block, 16 - annular connecting plate. Specific embodiments

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the 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 of 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 belong to the scope of protection of the present invention.

[0016] As Figure 1 shown, a hydraulic accessory replacement device for a hydraulic excavator includes an outer sleeve 1. One side of the top of the outer sleeve 1 is fixedly installed with a first port 2 communicating with its inner cavity, and the top of the first port 2 is fixedly connected to a hydraulic oil tank, so that the hydraulic oil carrying powder impurities in the hydraulic oil tank can enter the inner cavity of the outer sleeve 1 through the first port 2. The other side of the top of the outer sleeve 1 is fixedly installed with a second port 3 communicating with its inner cavity, and the other end of the second port 3 is communicated with the oil supply system of the hydraulic accessory. A first communication groove 9 is formed on one side of the inner wall of the outer sleeve 1, and one end of the first communication groove 9 is communicated with the second port 3. An inner sleeve rod 4 is arranged inside the outer sleeve 1, and the end of the inner sleeve rod 4 is threadedly connected to the input end of the filter. As Figure 3 、 Figure 4As shown, a flow groove 10 communicating with its inner cavity is provided on one side of the outer surface of the inner sleeve rod 4. Thus, the hydraulic oil flowing back into the inner cavity of the outer sleeve 1 can be conveyed to the filter at the end of the inner sleeve rod 4 through the flow groove 10. An elastic scraper 5 with a spiral structure and an outer surface contacting the inner wall of the outer sleeve 1 is movably sleeved on the outer surface of the inner sleeve rod 4. A right end cover 12 with one end fixedly connected to one end of the elastic scraper 5 is movably sleeved on one side of the outer surface of the inner sleeve rod 4. A second communication groove 13 is formed inside the right end cover 12. One end of the second communication groove 13 communicates with the output end of the filter threadedly connected to the end of the inner sleeve rod 4, and the other end of the second communication groove 13 communicates with a third communication groove 14 formed on the other side of the outer surface of the right end cover 12. As Figure 5 shown, the second port 3 can be communicated with the output end of the filter through the second communication groove 13, the third communication groove 14 and the first communication groove 9, and the hydraulic oil filtered by the filter can be conveyed to the oil supply system. Meanwhile, when disassembling, installing and replacing the filter and the hydraulic oil, as the filter rotates, the elastic scraper 5 thereon can be driven to rotate under the driving action of the right end cover 12. Thus, the inner wall of the outer sleeve 1 and the outer surface of the inner sleeve rod 4 can be scraped, and the deposited powder impurities thereon can be removed. When the filter threadedly connected to the end of the inner sleeve rod 4 is removed, the end of the elastic scraper 5 is no longer extruded and returns to its initial position. Due to the deformation of the outer surface of the elastic scraper 5, the powder impurities deposited on its outer surface can be loosened and washed away by the flowing hydraulic oil. Thus, it can effectively prevent the powder impurities deposited in the inner cavity of the outer sleeve 1 from "polluting" the replaced filter and the hydraulic oil.

[0017] As Figure 2 、 Figure 5 shown, in this technical solution, after the filter is installed, the bottom end of the first communication groove 9 communicates with the third communication groove 14 on the right end cover 12, so that the hydraulic oil filtered by the filter can be conveyed to the oil supply system communicated with the second port 3 through the third communication groove 14 and the first communication groove 9. When disassembling and replacing the filter, as the elastic scraper 5 returns to its initial position, the positions of the first communication groove 9 and the right end cover 12 are staggered from each other, so that the hydraulic oil in the oil supply system can also be emptied through the inner cavity of the outer sleeve 1.

[0018] As Figure 2As shown, in this technical solution, when disassembling and replacing the filter, as the elastic scraper 5 returns to its initial position, the end face of the right end cover 12 protrudes from the end face of the inner sleeve rod 4. Thus, when installing the filter, the second communication groove 13 on the right end cover 12 can be aligned with the output end of the filter first, and during the process of continuously rotating and tightening the filter, the right end cover 12 and the elastic scraper 5 thereon can be synchronously driven to rotate, effectively improving the installation accuracy between the second communication groove 13 on the right end cover 12 and the output end of the filter.

[0019] As Figure 4 shown, in this technical solution, three groups of grooves 11 arranged in a circumferential array along the central axis direction of the inner sleeve rod 4 are provided on the outer surface of the elastic scraper 5. Thus, the hydraulic oil in the inner cavity of the outer sleeve 1 can be effectively drained through the grooves 11, preventing some hydraulic oil from remaining therein and "polluting" the replaced hydraulic oil.

[0020] As Figure 1 shown, in this technical solution, the other end of the inner sleeve rod 4 extends to the outside of the outer sleeve 1. A limit nut 8 is threadedly connected to one side of the outer surface of the inner sleeve rod 4, and the circumferential rotation of the limit nut 8 is restricted by the left end cover 7 fixedly installed at the end of the outer sleeve 1, thereby restricting the circumferential freedom of the inner sleeve rod 4 and preventing the inner sleeve rod 4 from rotating synchronously during the process of rotating and tightening or disassembling the filter, which may cause problems in disassembling and assembling the filter. Meanwhile, with the settings of the left end cover 7 and the limit nut 8, the inner sleeve rod 4, the elastic scraper 5, and the right end cover 12 can be disassembled for cleaning operations, effectively preventing the phenomenon of scale formation of the powder impurities deposited in the inner cavity of the outer sleeve 1.

[0021] As Figure 1 、 Figure 4 shown, in this technical solution, a conical pressing block 15 is fixedly sleeved on one side of the outer surface of the inner sleeve rod 4 and located in the inner cavity of the outer sleeve 1, and an annular connecting plate 16 with an inner wall in frictional contact with the end face of the conical pressing block 15 is fixedly installed at one end of the elastic scraper 5. Thus, the elastic scraper 5 and the right end cover 12 can be restricted by the conical pressing block 15 and the annular connecting plate 16, preventing the right end cover 12 and the elastic scraper 5 thereon from falling off during the process of disassembling, assembling, and replacing the filter. Meanwhile, an elastic member 6 is movably sleeved on one side of the outer surface of the inner sleeve rod 4 and between the limit nut 8 and the end face of the outer sleeve 1, and the relative sealing between the conical pressing block 15 and the annular connecting plate 16 is maintained through the elastic member 6, preventing the problem of hydraulic oil leakage therefrom.

[0022] As Figure 2As shown, in this technical solution, the outer sleeve 1 and the first port 2 are arranged at a certain angle, so that the hydraulic oil flowing back into the inner cavity of the outer sleeve 1 through the first port 2 can stably flow into the filter threadedly connected to the end of the inner sleeve rod 4. During the process of replacing the hydraulic oil, the hydraulic oil in the inner cavity of the outer sleeve 1 can be effectively emptied, preventing the hydraulic oil containing powder impurities from remaining in the inner cavity of the outer sleeve 1.

[0023] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic accessory replacement device for a hydraulic excavator, comprising an outer sleeve (1). One side of the top end of the outer sleeve (1) is fixedly installed with a first port (2) communicating with its inner cavity, and the other side of the top end of the outer sleeve (1) is fixedly installed with a second port (3) communicating with its inner cavity. It is characterized in that: On one side of the inner wall of the outer sleeve (1), a first communication groove (9) is formed. One end of the first communication groove (9) is communicated with the second port (3). An inner sleeve rod (4) is arranged inside the outer sleeve (1). A circulation groove (10) communicating with its inner cavity is arranged on one side of the outer surface of the inner sleeve rod (4). An elastic scraping plate (5) whose outer surface is in contact with the inner wall of the outer sleeve (1) is movably sleeved on the outer surface of the inner sleeve rod (4). A right end cover (12) whose end is fixedly connected to one end of the elastic scraping plate (5) is movably sleeved on one side of the outer surface of the inner sleeve rod (4). A second communication groove (13) is formed inside the right end cover (12). The other end of the second communication groove (13) is communicated with a third communication groove (14) formed on the other side of the outer surface of the right end cover (12).

2. The hydraulic accessory replacement device for a hydraulic excavator according to claim 1, characterized in that, After the filter is installed, the bottom end of the first communication groove (9) is communicated with the third communication groove (14) on the right end cover (12). When disassembling, installing and replacing the filter, as the elastic scraping plate (5) returns to its initial position, the positions between the first communication groove (9) and the right end cover (12) are staggered from each other.

3. The hydraulic accessory replacement device for a hydraulic excavator according to claim 2, characterized in that, When disassembling, installing and replacing the filter, as the elastic scraping plate (5) returns to its initial position, the end face of the right end cover (12) protrudes from the end face of the inner sleeve rod (4).

4. The hydraulic accessory replacement device for a hydraulic excavator according to claim 1, characterized in that, A groove (11) along the central axis direction of the inner sleeve rod (4) is formed on the outer surface of the elastic scraping plate (5).

5. The hydraulic accessory replacement device for a hydraulic excavator according to claim 1, characterized in that, The other end of the inner sleeve rod (4) extends to the outside of the outer sleeve (1). A limit nut (8) is threadedly connected to one side of the outer surface of the inner sleeve rod (4). The circumferential rotation of the limit nut (8) is restricted by a left end cover (7) fixedly installed at the end of the outer sleeve (1), thereby restricting the circumferential freedom degree of the inner sleeve rod (4).

6. The hydraulic accessory replacement device for a hydraulic excavator according to claim 5, characterized in that, A conical pressing block (15) is fixedly sleeved on one side of the outer surface of the inner sleeve rod (4) and located in the inner cavity of the outer sleeve (1). An annular connecting plate (16) whose inner wall is in frictional contact with the end face of the conical pressing block (15) is fixedly installed at one end of the elastic scraping plate (5). At the same time, an elastic member (6) is movably sleeved on one side of the outer surface of the inner sleeve rod (4) and located between the limit nut (8) and the end face of the outer sleeve (1).

7. The hydraulic accessory replacement device for a hydraulic excavator according to claim 1, characterized in that, The outer sleeve (1) and the first port (2) are arranged at a certain angle.

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