A rotary hydraulic device for excavators

Abstract

The present invention provides a rotary hydraulic device for excavators, which relates to the technical field of excavators, including a base, crawlers are symmetrically provided at the front and rear ends of the base, a turntable is rotatably provided at the upper end of the base, a driving platform is installed at the upper end of the turntable, a working chamber is provided at the rear end of the base, a cover plate is installed at the rear side of the working chamber, a hydraulic mechanism, a rotary mechanism and a mud scraping mechanism are installed in the working chamber, the hydraulic mechanism is respectively connected to the rotary mechanism and the mud scraping mechanism, the rotary mechanism is fixedly connected to the turntable, the mud scraping mechanism is in corresponding contact with the turntable, and the mud scraping mechanism automatically scrapes the mud outside the turntable without manual cleaning, saving time and effort, and solving the technical problem that the rotary part is located between the excavator cab and the crawler, its surface is easily adhered to mud, and if it is not cleaned for a long time, it is easy to affect the rotation effect. If manual cleaning is adopted, due to the small space between the excavator cab and the crawler, it is not only inconvenient to clean, but also time-consuming and labor-intensive.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, and in particular to a rotary hydraulic device for excavators. Background Art

[0002] An excavator, also known as a backhoe, is an earth-moving machine that uses a bucket to dig materials above or below the surface and load them into transport vehicles or unload them to a stockpile. An excavator consists of a power unit, a working device, a slewing mechanism, a control mechanism, a transmission mechanism, a traveling mechanism, and other structures. It is mostly used for digging materials such as soil, coal, and sediment.

[0003] Current excavators usually have a rotary hydraulic structure, and its working mode is to hydraulically control the rotary structure to rotate in the forward and reverse directions. When the excavator is working, the surface of the rotary structure located between the excavator cab and the crawler track is prone to adhesion of mud. If it is not cleaned for a long time, it is easy to affect the rotation effect. If manual cleaning is used, due to the small space between the excavator cab and the crawler track, it is not only inconvenient to clean, but also time-consuming and labor-intensive. Summary of the Invention

[0004] The present invention provides a rotary hydraulic device for an excavator, which is used to solve the above-mentioned technical problem that the surface of the rotary structure located between the excavator cab and the crawler track is easily adhered to mud, which is easy to affect the rotation effect if not cleaned for a long time. If manual cleaning is used, due to the small space between the excavator cab and the crawler track, it is not only inconvenient to clean, but also time-consuming and labor-intensive.

[0005] In order to solve the above technical problems, the present invention discloses a rotary hydraulic device for excavators, comprising a base, crawlers symmetrically provided at the front and rear ends of the base, a turntable rotatably provided at the upper end of the base, a driving platform installed at the upper end of the turntable, a working chamber provided at the rear end of the base, a cover plate installed on the rear side of the working chamber, a hydraulic mechanism, a rotary mechanism and a mud scraping mechanism installed in the working chamber, the hydraulic mechanism being connected to the rotary mechanism and the mud scraping mechanism respectively, the rotary mechanism being fixedly connected to the turntable, and the mud scraping mechanism being in corresponding contact with the turntable.

[0006] Preferably, the hydraulic mechanism includes a hydraulic box, in which hydraulic oil is stored, an outlet 1 of the hydraulic box is connected to a power pump 1 through a liquid outlet pipe 1, the power pump 1 is connected to an inlet of a two-position three-way valve through a liquid outlet pipe 2, an outlet 1 of the two-position three-way valve is connected to a plurality of liquid outlet branch pipes 1, a plurality of liquid outlet branch pipes 1 are connected to inlets of a plurality of electromagnetic reversing valves 3 in a one-to-one correspondence, an outlet 1 and an outlet 2 of a plurality of electromagnetic reversing valves 3 are respectively connected to inlets and outlets of a plurality of hydraulic telescopic cylinders 1 through a plurality of liquid delivery pipes 3, a reflux port of a plurality of electromagnetic reversing valves 3 is connected to an inlet 1 of the hydraulic box through a plurality of liquid inlet pipes 1, an outlet 2 of the two-position three-way valve is connected to a temporary storage chamber inside a temporary storage shell through a liquid outlet branch pipe 2, a liquid infusion pipe is connected to the left and right sides of the temporary storage chamber, and the liquid infusion pipes on the left and right sides are respectively connected to the liquid inlet pump and the liquid outlet pump.

[0007] Preferably, outlet two of the hydraulic box is connected to power pump three through liquid outlet pipe three, power pump three is connected to inlet one of electromagnetic reversing valve one through liquid outlet pipe four, outlet one and outlet two of electromagnetic reversing valve one are connected to the inlet and outlet of hydraulic telescopic cylinder two respectively through liquid supply pipe one, the reflux port of electromagnetic reversing valve one is connected to inlet two of the hydraulic box through liquid inlet pipe two, outlet three of the hydraulic box is connected to power pump two through liquid outlet pipe five, power pump two is connected to inlet one of electromagnetic reversing valve two through liquid outlet pipe six, outlet one and outlet two of electromagnetic reversing valve two are connected to the inlet and outlet of hydraulic telescopic cylinder three respectively through liquid supply pipe two, and the reflux port of electromagnetic reversing valve two is connected to inlet three of the hydraulic box through liquid inlet pipe three.

[0008] Preferably, the scraping mechanism includes an opening 1 connected to the working chamber, the opening 1 is arranged on the rear side of the upper end of the base, and partition 1 is symmetrically provided on the left and right sides of the opening 1. The lower ends of the partition 1 on the left and right sides are fixedly connected to the partition 2 on the left and right sides in a one-to-one correspondence. The partition 2 on the left and right sides are symmetrically arranged on the left and right sides of the working chamber, and a scraping block is slidably provided between the partition 1 on the left and right sides. A hydraulic telescopic cylinder 2 is fixedly provided at the lower end of the scraping block, and the scraping block is arranged corresponding to the side end of the turntable.

[0009] Preferably, pull ropes are symmetrically provided on the left and right sides of the lower end of the scraper block, the pull ropes are connected to the guide wheels, the guide wheels are rotatably set in the mounting opening and the mounting seat opened in the partition two, the mounting seat is fixedly connected to the partition two, the end of the pull rope away from the scraper block is fixedly connected to the lower end of the supporting block, the supporting block is slidingly set between the partition two and the partition three, a number of telescopic buffer blocks are fixedly provided between the supporting block and the working chamber, the partition three is symmetrically set on the left and right sides of the working chamber, a fixed plate is fixed on the front side between the partition three on the left and right sides, and opening two is symmetrically provided on the left and right sides of the fixed plate.

[0010] Preferably, a distance sensor is provided between the bearing block and the working chamber, and the distance sensor is electrically connected to the two-position three-way valve, the liquid inlet pump and the liquid outlet pump through the controller 1.

[0011] Preferably, a rotating shaft is correspondingly provided in opening two, and a pushing plate is respectively provided on the left and right sides of the rotating shaft, the arc section of the pushing plate is in corresponding contact with the arc section of the supporting block, and the end of the pushing plate away from the supporting block is fixedly connected to the fixed block, and the fixed block is fixedly connected to the support seat one through a number of springs, and the support seat one is slidably connected to the pushing plate, and the support seat one is rotatably connected to the support seat two through the rotating rod, and the support seat two is fixedly connected to the mounting block, and the mounting block is fixedly arranged on the front side of the rotating shaft, and the mounting block is fixedly connected to the connecting block one, and the connecting block one is fixedly connected to the hydraulic telescopic cylinder one and the hydraulic telescopic cylinder three through the connecting block two, and the hydraulic telescopic cylinder three is movably connected to the lower side of the fixed plate, and the hydraulic telescopic cylinder three is in corresponding contact with the pushing block, and the pushing block is arranged between the partition two and the partition three, and the sliding block of the pushing block is slidably connected to the sliding cavity in the supporting block, and a spring two is fixedly provided between the sliding block and the sliding cavity.

[0012] Preferably, the rotating mechanism includes a rotating shell, a mounting plate is fixedly provided in the cavity inside the rotating shell, a hydraulic motor is fixedly provided at the upper end of the mounting plate, the rotating part in the hydraulic motor is fixedly connected to the turntable and the connecting shaft, the connecting shaft passes through the mounting plate, the liquid inlet of the hydraulic motor is connected to the liquid inlet pump, and the liquid outlet of the hydraulic motor is connected to the liquid outlet pump.

[0013] Preferably, a fixed shell one is fixedly provided at the lower end of the temporary storage shell, the lower end of the fixed shell one is fixedly connected to the fixed shell two, the sealed cavity inside the fixed shell one is communicated with the sealed cavity inside the fixed shell two, the sealed cavity inside the fixed shell two is slidingly connected to the sealing block, the sealing block is fixedly connected to the friction block, the friction block is in corresponding contact with the connecting shaft, the sealing block is fixedly connected to the connecting plate, and a spring three is fixedly provided on the side end of the connecting plate and the cavity.

[0014] Preferably, the sealing chamber inside the fixed shell is connected to the temporary storage chamber, and the sealing chamber inside the fixed shell is symmetrically provided with sealing plates on the left and right sides near one end of the temporary storage chamber, a support shaft is rotatably provided between the sealing plates on the left and right sides, and the end of the sealing plate away from the support shaft is slidably connected to the sealing chamber inside the fixed shell, a telescopic rod is fixedly provided between the lower end of the support shaft and the sealing chamber inside the fixed shell, the upper end of the support shaft is fixedly connected to the matching block, filter screens are symmetrically provided on the left and right sides of the temporary storage chamber, contact blocks are symmetrically provided on the left and right sides of the inclined section of the matching block, the contact blocks are slidably connected to the upper end of the temporary storage chamber, the matching blocks are fixedly connected to the connecting blocks, and the connecting blocks are Three penetrates the upper end of the temporary storage shell and is connected with the outside world. Connecting blocks four are symmetrically provided on the left and right ends of connecting block three. Several spring rods are fixed between connecting block four and the upper end of the temporary storage shell. Connecting block four is fixedly connected to two connecting blocks five. Connecting block five penetrates the upper end of the temporary storage shell into the temporary storage cavity and is fixedly connected to the scraper. The scrapers connected by the two connecting blocks five are distributed on the left and right sides of the filter screen. Collecting shells are symmetrically provided on the left and right sides of the lower end of the temporary storage shell. There are two collecting ports in communication between the collecting shell and the temporary storage cavity, and the collecting ports are distributed on the left and right sides of the filter screen. A blocking plate is rotatably provided in the collecting port, and a spring four is fixed between the blocking plate and the side end of the collecting port.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The scraper mechanism automatically scrapes the mud on the outside of the turntable, eliminating the need for manual cleaning, saving time and effort. It solves the problem that the rotating part is located between the excavator cab and the crawler, and its surface is easily adhered to mud. If it is not cleaned for a long time, it will easily affect the rotation effect. If manual cleaning is used, due to the small space between the excavator cab and the crawler, it will not only be inconvenient to clean, but also time-consuming and labor-intensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the base structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the base of the present invention;

[0021] Figure 4 Schematic diagram of the scraping mechanism structure of the present invention Figure 1 ;

[0022] Figure 5 Schematic diagram of the scraping mechanism structure of the present invention Figure 2;

[0023] Figure 6 Schematic diagram of the scraping mechanism structure of the present invention Figure 3 ;

[0024] Figure 7 This is a schematic diagram of the rotating shaft connection structure of the present invention;

[0025] Figure 8 It is a schematic structural diagram of the rotary mechanism of the present invention;

[0026] Figure 9 Schematic diagram of the friction block connection structure of the present invention Figure 1 ;

[0027] Figure 10 This is a schematic diagram of the temporary storage shell connection structure of the present invention;

[0028] Figure 11 for Figure 10 Schematic diagram of the enlarged structure of area A;

[0029] Figure 12 Schematic diagram of the friction block connection structure of the present invention Figure 2 .

[0030] In the figure: 1. Driving platform; 2. Track; 3. Base; 4. Rotating table; 5. Hydraulic motor; 6. Opening 1; 7. Working chamber; 8. Partition 3; 9. Partition 2; 10. Bearing block; 11. Scraper block; 12. Fixed plate; 13. Opening 2; 14. Partition 1; 15. Pusher block; 16. Connecting block 2; 17. Connecting block 1; 18. Hydraulic telescopic cylinder 3; 19. Hydraulic telescopic cylinder 1; 20. Hydraulic box; 21. Rotating shell; 22. Telescopic buffer block; 23. Hydraulic telescopic cylinder 2; 24. Pull rope; 25. Guide wheel; 26. Push plate; 27. Rotating shaft; 28. Mounting block; 29. ​​Rotating rod; 30. Fixed block; 31. Support seat 1; 32. Spring 1; 33. Mounting plate; 34. Connecting shaft; 35. Friction block; 36. Fixed shell 2; 37. Connecting plate; 38. Spring 3; 39. Fixed shell 1; 40. Temporary storage shell; 41. Liquid inlet pump; 42. Connecting block 3; 43. Temporary storage chamber; 44. Sealing plate; 45. Spring rod; 46. Connecting block 5; 47. Scraper; 48. Filter screen; 49. Blocking plate; 50. Collecting shell; 51. Contact block; 52. Matching block; 53. Infusion tube; 54. Support seat 2; 55. Sealing block; 56. Connecting block 4; 57. Mounting seat; 58. Mounting port; 59. Gear. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides the following embodiments:

[0034] Example 1: The present invention provides a rotary hydraulic device for excavators, such as Figure 1-Figure 5 As shown, it includes a base 3, and crawlers 2 are symmetrically provided at the front and rear ends of the base 3. A turntable 4 is rotatably provided at the upper end of the base 3, and a driving platform 1 is installed on the upper end of the turntable 4. A working chamber 7 is provided at the rear end of the base 3, and a cover plate is installed on the rear side of the working chamber 7. A hydraulic mechanism, a rotating mechanism and a mud scraping mechanism are installed in the working chamber 7. The hydraulic mechanism is connected to the rotating mechanism and the mud scraping mechanism respectively, the rotating mechanism is fixedly connected to the turntable 4, and the mud scraping mechanism is in corresponding contact with the turntable 4.

[0035] The working principle of the above technical solution is:

[0036] The crawler 2 is connected to the driving mechanism in the base 3. The driving mechanism drives the base 3 to move by the crawler 2. The base 3 drives the driving platform 1 to move through the turntable 4. The driving platform 1 is equipped with a hydraulic arm and a shovel ( Figure 1The present invention will not be repeated here. The hydraulic mechanism can drive the rotary mechanism to rotate, and the rotary mechanism drives the rotary platform 4 to rotate, and the rotary platform 4 drives the driving platform 1 and the mechanism connected thereto to rotate. Since the rotary platform 4 is arranged between the driving platform 1 and the base 3, it supports and rotates the driving platform 1. The mud scraping mechanism is provided to automatically scrape the mud on the outside of the rotary platform 4 to prevent the excavator from working for a long time and causing excessive mud to adhere to the outside of the rotary platform 4, affecting the normal rotation of the rotary platform 4. The mud scraping mechanism automatically scrapes the mud on the outside of the rotary platform 4, eliminating the need for manual cleaning, saving time and effort, and solving the problem that the rotary structure surface between the excavator cab and the crawler is prone to adhesion of mud, which will easily affect the rotation effect if not cleaned for a long time. If manual cleaning is adopted, the space between the excavator cab and the crawler is small, which is not only inconvenient to clean, but also time-consuming and labor-intensive.

[0037] Example 2: Based on Example 1, Figure 1-Figure 7 As shown, the hydraulic mechanism includes a hydraulic box 20, in which hydraulic oil is stored. An outlet 1 of the hydraulic box 20 is connected to a power pump 1 through a liquid outlet pipe 1, and the power pump 1 is connected to an inlet of a two-position three-way valve through a liquid outlet pipe 2. An outlet 1 of the two-position three-way valve is connected to a plurality of liquid outlet branch pipes 1, and the plurality of liquid outlet branch pipes 1 are connected to inlets of a plurality of electromagnetic reversing valves 3 in a one-to-one correspondence. The outlets 1 and 2 of the plurality of electromagnetic reversing valves 3 are connected to inlets and outlets of a plurality of hydraulic telescopic cylinders 19 in a one-to-one correspondence through a plurality of liquid feeding pipes 3, respectively. The reflux ports of the plurality of electromagnetic reversing valves 3 are connected to an inlet 1 of the hydraulic box 20 through a plurality of liquid inlet pipes 1, and an outlet 2 of the two-position three-way valve is connected to a temporary storage chamber 43 inside a temporary storage shell 40 through a liquid outlet branch pipe 2. The left and right sides of the temporary storage chamber 43 are respectively connected to liquid infusion pipes 53, and the liquid infusion pipes 53 on the left and right sides are respectively connected to the liquid inlet pump 41 and the liquid outlet pump;

[0038] Outlet 2 of the hydraulic box 20 is connected to power pump 3 through liquid outlet pipe 3, power pump 3 is connected to inlet 1 of electromagnetic reversing valve 1 through liquid outlet pipe 4, outlet 1 and outlet 2 of electromagnetic reversing valve 1 are respectively connected to the inlet and outlet of hydraulic telescopic cylinder 2 23 through liquid feeding pipe 1, the reflux port of electromagnetic reversing valve 1 is connected to inlet 2 of the hydraulic box 20 through liquid inlet pipe 2, outlet 3 of the hydraulic box 20 is connected to power pump 2 through liquid outlet pipe 5, power pump 2 is connected to inlet 1 of electromagnetic reversing valve 2 through liquid outlet pipe 6, outlet 1 and outlet 2 of electromagnetic reversing valve 2 are respectively connected to the inlet and outlet of hydraulic telescopic cylinder 3 18 through liquid feeding pipe 2, and the reflux port of electromagnetic reversing valve 2 is connected to inlet 3 of the hydraulic box 20 through liquid inlet pipe 3.

[0039] The working principle of the above technical solution is:

[0040] Filters are installed on the liquid inlet pipe 1, the liquid inlet pipe 2 and the liquid inlet pipe 3 to filter impurities in the hydraulic oil in the pipeline, ensuring that the hydraulic oil stored in the hydraulic tank 20 is free of impurities, and then the hydraulic oil output from the hydraulic tank 20 is free of impurities. When the power pump 1 is working, it can send the hydraulic oil in the hydraulic tank 20 to the inlet of the two-position three-way valve. If the outlet 1 of the two-position three-way valve is opened, the outlet 2 of the two-position three-way valve remains closed, and the inlet 1 of the electromagnetic reversing valve 3 is connected with the outlet 1 of the electromagnetic reversing valve 3. At this time, the outlet 2 of the electromagnetic reversing valve 3 is connected with the reflux port.

[0041] The hydraulic oil in the hydraulic box 20 enters the inlet of the hydraulic telescopic cylinder 19 in sequence through the outlet 1 of the two-position three-way valve, the liquid outlet branch 1, the inlet 1 of the electromagnetic reversing valve 3, the outlet 1 and the liquid supply pipe 3, pushing the hydraulic telescopic cylinder 19 to extend. When the hydraulic telescopic cylinder 19 extends, the hydraulic oil originally in the hydraulic telescopic cylinder 19 enters the hydraulic box 20 through the outlet, the liquid supply pipe 3, the outlet 2 of the electromagnetic reversing valve 3, the reflux port and the liquid inlet pipe 1. After the outlet 1 of the two-position three-way valve is closed, the outlet 2 of the two-position three-way valve is opened. At this time, the hydraulic telescopic cylinder 19 stops working and the hydraulic oil is replenished in the temporary storage shell 40.

[0042] When the hydraulic telescopic cylinder 19 is controlled to retract, the inlet 1 of the electromagnetic reversing valve 3 is connected to the outlet 2 of the electromagnetic reversing valve 3, and the outlet 1 of the electromagnetic reversing valve 3 is connected to the return port. At this time, the hydraulic oil in the hydraulic tank 20 is sequentially fed into the outlet of the hydraulic telescopic cylinder 19 through the outlet 1 of the two-position three-way valve, the liquid outlet branch pipe 1, the inlet 1 and outlet 2 of the electromagnetic reversing valve 3, and the liquid feeding pipe 3, pushing the hydraulic telescopic cylinder 19 to retract. The hydraulic oil in the hydraulic telescopic cylinder 19 flows into the hydraulic tank 20 through the inlet, the liquid feeding pipe 3, the outlet 1 of the electromagnetic reversing valve 3, and the return port, thereby achieving the purpose of controlling the hydraulic telescopic cylinder 19 by controlling the electromagnetic reversing valve 3.

[0043] Similarly, the electromagnetic reversing valve three has the same working principle as the electromagnetic reversing valve one and the electromagnetic reversing valve two. Specifically, when the inlet one and the outlet one of the electromagnetic reversing valve one are connected, the outlet two of the electromagnetic reversing valve one is connected to the return port, and at this time the hydraulic telescopic cylinder two 23 extends. When the inlet one of the electromagnetic reversing valve one and the outlet two of the electromagnetic reversing valve one are connected, the outlet one of the electromagnetic reversing valve one is connected to the return port, and at this time the hydraulic telescopic cylinder two 23 contracts. Therefore, the power pump three works, which can realize the extension and contraction of the hydraulic telescopic cylinder two 23. When the inlet 1 and the outlet 1 are connected, the outlet 2 of the electromagnetic reversing valve 2 is connected to the return port. At this time, the hydraulic telescopic cylinder 3 18 extends. When the inlet 1 in the electromagnetic reversing valve 2 and the outlet 2 in the electromagnetic reversing valve 2 are connected, the outlet 1 in the electromagnetic reversing valve 2 is connected to the return port. At this time, the hydraulic telescopic cylinder 3 18 contracts, and the power pump 2 works, which can realize the extension and contraction of the hydraulic telescopic cylinder 3 18. The above-mentioned filter, hydraulic mechanism and the hydraulic circuit for controlling the extension and contraction of the hydraulic telescopic cylinder through the power pump and the electromagnetic reversing valve adopt existing technology, and the present invention will not elaborate on them.

[0044] Example 3: Based on Example 2, Figure 1-Figure 7 As shown, the scraping mechanism includes an opening 6 connected to the working chamber 7, the opening 6 is arranged on the rear side of the upper end of the base 3, and partitions 14 are symmetrically provided on the left and right sides of the opening 6. The lower ends of the partitions 14 on the left and right sides are fixedly connected to the partitions 9 on the left and right sides in a one-to-one correspondence. The partitions 9 on the left and right sides are symmetrically arranged on the left and right sides of the working chamber 7. A scraping block 11 is slidably provided between the partitions 14 on the left and right sides. A hydraulic telescopic cylinder 23 is fixedly provided at the lower end of the scraping block 11. The scraping block 11 is provided corresponding to the side end of the turntable 4.

[0045] A pull rope 24 is symmetrically provided on the left and right sides of the lower end of the scraping block 11, and the pull rope 24 is connected to the guide wheel 25. The guide wheel 25 is rotatably set in the mounting opening 58 and the mounting seat 57 opened in the partition 2 9. The mounting seat 57 is fixedly connected to the partition 2 9. The end of the pull rope 24 away from the scraping block 11 is fixedly connected to the lower end of the bearing block 10. The bearing block 10 is slidably set between the partition 2 9 and the partition 3 8. A plurality of telescopic buffer blocks 22 are fixedly provided between the bearing block 10 and the working chamber 7. The partition 3 8 is symmetrically arranged on the left and right sides of the working chamber 7. A fixed plate 12 is fixed on the front side between the partition 3 8 on the left and right sides, and an opening 2 13 is symmetrically provided on the left and right sides of the fixed plate 12.

[0046] A distance sensor is provided between the bearing block 10 and the working chamber 7 , and the distance sensor is electrically connected to the two-position three-way valve, the liquid inlet pump 41 and the liquid outlet pump through the controller 1.

[0047] The working principle of the above technical solution is:

[0048] A scraper block 11 is slidably provided between the partitions 14 on the left and right sides to prevent sludge from entering between the partitions 14 on the left and right sides. When the scraper mechanism is working, the hydraulic telescopic cylinder 23 is extended to drive the scraper block 11 to extend out of the opening 6, so that the tip of the scraper block 11 contacts the side end of the turntable 4. When the turntable 4 rotates, the scraper block 11 and the turntable 4 move relative to each other to scrape off the mud on the turntable 4. When the scraper block 11 moves upward, it drives the pull rope 24 to move, and the pull rope 24 drives the bearing block 10 to move downward into the working chamber 7. The bearing block 10 drives the telescopic buffer block 22 to press The setting of the guide wheel 25 guides the movement of the pull rope 24, and the scraped soil falls into the working chamber 7 through the opening 1 6 and falls on the bearing block 10 between the partition 2 9 and the partition 3 8. The setting of the partition 2 9 and the partition 3 8 prevents the soil from entering between the partitions 2 9 on the left and right sides and affecting the hydraulic telescopic cylinder 2 23, the pull rope 24 and the guide wheel 25, and also prevents the soil from entering the working chamber 7 outside the partition 3 8, making it convenient to collect the soil. The bearing block 10 is always located on the upper side of the mounting seat 57 to prevent the soil from affecting the pull rope 24 and the guide wheel 25;

[0049] The distance sensor is set to detect the distance between the lower end of the supporting block 10 and the lower end of the working chamber 7. The distance between the lower end of the supporting block 10 and the lower end of the working chamber 7 can be used to judge the deformation of the telescopic buffer block 22. The telescopic buffer block 22 can be a spring rod. The elastic force of the telescopic buffer block 22 can be judged by its stiffness coefficient and deformation. After the tip of the scraper block 11 contacts the side end of the turntable 4, the corresponding elastic force of the telescopic buffer block 22 is the initial elastic force. As the upper end of the supporting block 10 gradually accumulates soil, the supporting block 10 moves downward under the action of the gravity of the soil until the elastic force of the telescopic buffer block 22 reaches the target elastic force. The target elastic force minus the initial elastic force is the target gravity of the soil. The soil of the target gravity is set to be enough soil accumulated under this gravity. The soil scraped off subsequently cannot fall into the working chamber 7 through the opening 6. The target gravity and stiffness of the soil are determined according to the telescopic buffer. The elastic force of the punch block 22 is equal to the product of the stiffness coefficient of the telescopic buffer block 22 and the deformation of the telescopic buffer block 22, and the deformation required when the initial elastic force of the telescopic buffer block 22 reaches the target elastic force can be obtained, and then the theoretical distance between the support block 10 and the working chamber 7 when the elastic force of the telescopic buffer block 22 reaches the target elastic force can be obtained. If the detection value of the distance sensor is the same as the theoretical distance, the gravity of the soil on the support block 10 reaches the target gravity at this time, and the distance sensor controls the outlet 1 of the two-position three-way valve to open and the outlet 2 to close through the controller 1. At this time, the hydraulic telescopic cylinder 19 can be extended, and at the same time, the liquid inlet pump 41 and the liquid outlet pump are controlled to stop working, so that the turntable 4 stops working to avoid continuing to scrape mud. Since the gravity of the soil on the support block 10 reaches the target gravity, the soil cannot continue to enter the working chamber 7, and therefore the collection of soil cannot be completed. The collected soil should be cleared before continuing the scraping work.

[0050] Example 4: Based on Example 3, Figure 1-Figure 7As shown, a rotating shaft 27 is correspondingly provided in the opening 2 13, and a push plate 26 is provided on the left and right sides of the rotating shaft 27. The arc section of the push plate 26 contacts the arc section of the bearing block 10, and the end of the push plate 26 away from the bearing block 10 is fixedly connected to the fixed block 30. The fixed block 30 is fixedly connected to the support seat 1 31 through a plurality of springs 1 32. The support seat 1 31 is slidably connected to the push plate 26. The support seat 1 31 is rotatably connected to the support seat 2 54 through the rotating rod 29. The support seat 2 54 is fixedly connected to the mounting block 28. The block 28 is fixedly arranged on the front side of the rotating shaft 27, the mounting block 28 is fixedly connected to the connecting block 17, the connecting block 17 is fixedly connected to the hydraulic telescopic cylinder 19 and the hydraulic telescopic cylinder 3 18 through the connecting block 2 16, the hydraulic telescopic cylinder 3 18 is movably connected to the lower side of the fixed plate 12, the hydraulic telescopic cylinder 3 18 is in corresponding contact with the pusher block 15, the pusher block 15 is arranged between the partition 2 9 and the partition 3 8, the sliding block of the pusher block 15 is slidably connected to the sliding cavity in the bearing block 10, and a spring 2 is fixedly provided between the sliding block and the sliding cavity;

[0051] A contact switch is provided at one end of the second connecting block 16 close to the fixed plate 12 , and the contact switch is electrically connected to the first power pump and the second power pump through the second controller respectively.

[0052] The working principle of the above technical solution is:

[0053] After the outlet of the two-position three-way valve is opened, the hydraulic telescopic cylinder 19 is extended to push the connecting block 2 16 to move, and the connecting block 2 16 drives the connecting block 17 to move. The connecting block 17 pushes the rotating shaft 27 to move in the direction of the bearing block 10 through the mounting block 28. When the elastic force of the telescopic buffer block 22 reaches the target elastic force, the bearing block 10 just moves to the lower side of the pushing plate 26. At this time, the bearing block 10 just drives the pushing block 15 to contact with the lower end of the working chamber 7. The height of the pushing block 15 is greater than the height of the bearing block 10, which realizes the purpose of the bearing block 10 always being located on the upper side of the mounting seat 57. The rotating shaft 27 drives the pushing plate 26 to move in the direction of the bearing block 10, and the pushing plate 26 contacts the upper end of the bearing block 10, pushing the soil on the upper end of the bearing block 10 to move toward the rear side of the working chamber 7. The pushing plate 26 and the rotating shaft 27 are rotatably arranged so that the pushing plate 26 can rotate along the rotating shaft 27. The elastic force of the spring 1 32 is large enough to ensure that the soil cannot push the pushing plate 26 to rotate along the rotating shaft 27. During this process, the rotating rod 29 drives the support seat 1 31 to slide along the pushing plate 26. The spring 1 32 is compressed so that the pushing plate 26 can rotate freely when sliding along the upper end of the bearing block 10, ensuring that the pushing plate 26 passes smoothly between the partition 2 9 and the partition 3 8. When the pushing plate 26 cannot move, the soil is pushed onto the pushing block 15, thereby clearing the bearing block 1 The soil on the carrier block 10 and the setting of the contact switch, after the push plate 26 cannot move, the connecting block 2 16 contacts the contact switch on the fixed plate 12, and the contact switch controls the power pump 1 to stop working through the controller 2, and the power pump 2 starts working. At this time, the hydraulic telescopic cylinder 19 automatically stops extending, and the hydraulic telescopic cylinder 3 18 automatically extends, ensuring the continuous operation between the hydraulic telescopic cylinder 19 and the hydraulic telescopic cylinder 3 18. The tediousness of manual operation is reduced by the automatic working mode. Since the pusher block 15 is tilted, the soil can slide along the pusher block 15 to the rear side of the working chamber 7, and then the hydraulic telescopic cylinder 3 18 is controlled to extend, and the movable end of the hydraulic telescopic cylinder 3 18 drives the pusher block 15 Extend, spring two extends, and the pushing block 15 can push the mud out of the working chamber 7, thereby completing the function of automatic dirt cleaning. After the dirt cleaning is completed, the hydraulic telescopic cylinder three 18 is controlled to shrink, and the pushing block 15 is restored to its original position under the elastic action of spring two, and then the hydraulic telescopic cylinder one 19 is controlled to shrink and drive the push plate 26 to move to the opening two 13. At this time, the push plate 26 is no longer located at the upper end of the bearing block 10, and the bearing block 10 is restored to its original position under the elastic action of the telescopic buffer block 22. At this time, the detection value of the distance sensor is no longer the theoretical distance. The distance sensor controls the outlet one of the two-position three-way valve through the controller one to close and the outlet two to open. At this time, the turntable 4 can continue to be controlled to rotate to perform the mud scraping work.

[0054] Example 5: Based on Example 4, Figures 1-11As shown, the rotary mechanism includes a rotary shell 21, a mounting plate 33 is fixedly provided in the cavity inside the rotary shell 21, a hydraulic motor 5 is fixedly provided on the upper end of the mounting plate 33, a rotating portion of the hydraulic motor 5 is fixedly connected to the rotary table 4 and a connecting shaft 34, and the connecting shaft 34 is provided through the mounting plate 33, a liquid inlet of the hydraulic motor 5 is connected to a liquid inlet pump 41, and a liquid outlet of the hydraulic motor 5 is connected to a liquid outlet pump;

[0055] A fixed housing 1 39 is fixedly provided at the lower end of the temporary storage housing 40. The lower end of the fixed housing 1 39 is fixedly connected to the fixed housing 2 36. The sealed chamber inside the fixed housing 1 39 is in communication with the sealed chamber inside the fixed housing 2 36. The sealed chamber inside the fixed housing 2 36 is slidably connected to a sealing block 55. The sealing block 55 is fixedly connected to the friction block 35. The friction block 35 is in corresponding contact with the connecting shaft 34. The sealing block 55 is fixedly connected to the connecting plate 37. A spring 38 is fixedly provided between the connecting plate 37 and the side end of the cavity.

[0056] The sealed chamber inside the fixed shell 39 is connected to the temporary storage chamber 43, and the sealed chamber inside the fixed shell 39 is symmetrically provided with sealing plates 44 on the left and right sides near one end of the temporary storage chamber 43. A support shaft is rotatably provided between the sealing plates 44 on the left and right sides. The end of the sealing plate 44 away from the support shaft is slidably connected to the sealed chamber inside the fixed shell 39. A telescopic rod is fixed between the lower end of the support shaft and the sealed chamber inside the fixed shell 39. The upper end of the support shaft is fixedly connected to the matching block 52. The left and right sides of the temporary storage chamber 43 are symmetrically provided with filter screens 48. The left and right sides of the inclined section of the matching block 52 are symmetrically provided with contact blocks 51. The contact block 51 is slidably connected to the upper end of the temporary storage chamber 43. The matching block 52 is fixedly connected to the connecting block 3 42. The connecting block 3 42 passes through the temporary storage chamber. The upper end of the shell 40 is connected to the outside world, and connecting blocks 4 56 are symmetrically provided on the left and right ends of the connecting block 3 42. A number of spring rods 45 are fixed between the connecting block 4 56 and the upper end of the temporary storage shell 40. The connecting block 4 56 is fixedly connected to the two connecting blocks 5 46. The connecting block 5 46 passes through the upper end of the temporary storage shell 40 into the temporary storage cavity 43 and is fixedly connected to the scraper 47. The scrapers 47 connected by the two connecting blocks 5 46 are distributed on the left and right sides of the filter 48. The collecting shell 50 is symmetrically provided on the left and right sides of the lower end of the temporary storage shell 40. There are two collecting ports connected between the collecting shell 50 and the temporary storage cavity 43, and the collecting ports are distributed on the left and right sides of the filter 48. A blocking plate 49 is rotatably provided in the collecting port, and a spring four is fixed between the blocking plate 49 and the side end of the collecting port.

[0057] The working principle of the above technical solution is:

[0058] The inlet pump 41 and the outlet pump deliver and suck respectively, so that the hydraulic oil circulates along the inlet pump 41, the inlet of the hydraulic motor 5, the outlet of the hydraulic motor 5, the outlet pump, the infusion pipe 53, the temporary storage chamber 43 and the sealed chamber inside the fixed shell 39, which can drive the hydraulic motor 5 to work. The operation of the hydraulic motor 5 can drive the turntable 4 to rotate. The rotation direction of the hydraulic motor 5 can be achieved by changing the flow direction of the hydraulic oil, that is, the inlet and outlet of the hydraulic motor 5 can both be used for oil intake and oil discharge. In the initial state, the matching block 52 separates the left and right sides of the temporary storage chamber 43. The elastic force of the spring rods 45 is greater than the elastic force of the spring three 38, so the matching block 52 cannot move to the left and right sides of the temporary storage chamber 43. When the matching block 52 moves upward, since the sealing plate 44 cannot rotate when the matching block 52 is stationary, the sealing chamber and the temporary storage chamber 43 inside the fixed shell 39 are in a disconnected state. When the hydraulic oil flows in the temporary storage chamber 43, it first passes through the filter 48 to filter out impurities in the hydraulic oil, and then contacts the inclined section of the matching block 52 to push the matching block 52 to move upward. As the matching block 52 moves upward, the contact blocks 51 on the left and right sides move toward each other to prevent the hydraulic oil in the temporary storage chamber 43 from leaking to the outside. The sealing plates 44 on the left and right sides rotate, and at the same time, the sealing plates 44 slide along the sealing chamber inside the fixed shell 39. At this time, the sealing inside the fixed shell 39 is The cavity and the temporary storage cavity 43 are connected, and the sealed cavity inside the fixed shell 39 makes the left and right sides of the temporary storage cavity 43 connected. The matching block 52 drives the connecting block 4 56 to move upward through the connecting block 3 42, and the connecting block 4 56 drives a number of spring rods 45 to stretch and drive the connecting block 5 46 to move upward. The connecting block 5 46 drives the scraper 47 to move upward. At this time, the blocking plate 49 returns to its original position under the elastic action of the spring 4, blocks the collection port, and prevents the hydraulic oil from flowing into the collection shell 50 through the collection port. At the same time, the sealing block 55 is driven to move toward the internal sealed cavity of the fixed shell 2 36 under the elastic action of the spring 38, and the friction block 35 is disengaged from the connecting shaft 34. The friction block 3 5 is equivalent to a brake pad. At this time, the connecting shaft 34 can rotate freely with the rotating part of the hydraulic motor 5. Due to the pumping and suction work of the inlet pump 41 and the outlet pump, the hydraulic oil in the sealed chamber inside the fixed shell 1 39 is kept balanced by the forces exerted by the inlet pump 41 and the outlet pump. While the sealing block 55 moves toward the sealed chamber inside the fixed shell 2 36, it squeezes the hydraulic oil in the sealed chamber inside the fixed shell 1 39 into the temporary storage chamber 43 to fill the gap left after the matching block 52 moves out of the temporary storage chamber 43. At this time, the hydraulic oil circulates under pressure and can drive the hydraulic motor 5 to work normally. During this process, the sealing plate 44 moves upward into the temporary storage chamber 43, and the telescopic rod extends and retracts.

[0059] If the hydraulic motor 5 stops working, the inlet pump 41 and the outlet pump stop working. At this time, the hydraulic oil in the temporary storage chamber 43 no longer circulates, that is, the hydraulic oil no longer has pressure and can no longer apply pressure to the inclined section of the matching block 52. Therefore, under the elastic action of the plurality of spring rods 45, the connecting block 4 56 returns to its original position. The connecting block 4 56 drives the matching block 52 to return to its original position through the connecting block 3 42. When the matching block 52 moves downward, it drives the sealing plate 44 to rotate downward and return to its original position, so that the sealing chamber inside the fixed shell 39 and the temporary storage chamber 43 are connected. The hydraulic oil in the temporary storage chamber 43 is separated and the telescopic rod returns to its original position. Since the space of the temporary storage chamber 43 remains unchanged, the matching block 52 squeezes the hydraulic oil in the temporary storage chamber 43 back into the sealed chamber inside the fixed shell 1 39 during this process, and then the sealing block 55 is pushed by the hydraulic oil to move in the direction of the sealed chamber inside the fixed shell 2 36. The sealing block 55 drives the friction block 35 to contact the connecting shaft 34, so that the connecting shaft 34 stops rotating under the action of friction, and then the rotating part of the hydraulic motor 5 stops rotating, avoiding that even if the circulation of the hydraulic oil is stopped, the turntable 4 still rotates under the action of inertia, thereby improving the rotation accuracy of the hydraulic motor 5, and when the connecting block 4 56 moves downward, it can drive the connecting block 5 46 to move, and the connecting block 5 46 drives the scraper 47 to move downward along the filter screen 48, scraping the impurities attached to the filter screen 48 and pushing them into the collection port, and finally falling into the collection shell 50 for collection, so that the impurity removal step is automatically performed after each hydraulic oil circulation is completed, avoiding that too many impurities on the filter screen 48 affect the normal flow of the hydraulic oil, and the hydraulic oil in the temporary storage chamber 43 is discharged. After the loss occurs, the outlet 2 of the two-position three-way valve is opened. At this time, the hydraulic telescopic cylinder 19 stops working, allowing the hydraulic oil in the hydraulic box 20 to flow into the temporary storage shell 40 and replenish the hydraulic oil. When replenishing the hydraulic oil, the flow of the hydraulic oil in the temporary storage chamber 43 must be stopped, thereby ensuring that the sealing plate 44 separates the sealing chamber inside the fixed shell 1 39 and the temporary storage chamber 43, so that the hydraulic oil in the sealing chamber inside the fixed shell 1 39 and the sealing chamber inside the fixed shell 2 36 are always full, ensuring the normal contact between the friction block 35 and the connecting shaft 34;

[0060] Alternatively, as Figure 12As shown, rack 1 can be provided at the lower end of sealing block 55, rack 1 meshes with gear 59, gear 59 meshes with rack 2, rack 2 is fixedly connected to the upper end of connecting plate 37, spring 38 is fixedly provided at the side end of connecting plate 37 and cavity, and one end of connecting plate 37 away from spring 38 is fixedly connected to friction block 35. At this time, it is necessary to control the force of inlet pump 41 and outlet pump to be large enough, so as to make the pressure of hydraulic oil large enough. After the sealing cavity and temporary storage cavity 43 inside fixed shell 1 39 are connected, the hydraulic oil in temporary storage cavity 43 will exert pressure on the hydraulic oil in the sealing cavity inside fixed shell 1 39, so that the hydraulic oil in the sealing cavity inside fixed shell 1 39 can push sealing block 55 to move in the direction of the internal sealing cavity away from fixed shell 2 36, and sealing block 55 moves through rack 1, gear 59 and rack 2, and rack 2 drives friction block 35 to disengage from connecting shaft 34 through connecting plate 37, and spring 38 compresses At this time, the connecting shaft 34 can rotate freely with the rotating part of the hydraulic motor 5. If the inlet pump 41 and the outlet pump stop working, the friction block 35 contacts the connecting shaft 34 under the elastic action of the spring three 38, causing the connecting shaft 34 to stop rotating under the action of the friction force. When the sealing block 55 and the friction block 35 are directly connected, if it is difficult to control the force of the inlet pump 41 and the outlet pump, and thus it is difficult to ensure that the sealed chamber inside the fixed shell 39 and the temporary storage chamber 43 are connected, the sealing block 55 is moved toward the internal sealed chamber of the fixed shell 2 36 under the elastic action of the spring three 38 and the hydraulic oil in the sealed chamber inside the fixed shell 39 is squeezed into the temporary storage chamber 43. At this time, by arranging the rack 1, the gear 59 and the rack 2 between the sealing block 55 and the friction block 35, it is only necessary to control the force of the inlet pump 41 and the outlet pump to be large enough, and the step of disengaging the friction block 35 from the connecting shaft 34 while the hydraulic oil circulates can also be achieved.

[0061] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A rotary hydraulic device for an excavator, characterized in that: The invention comprises a base (3), crawlers (2) are symmetrically provided at the front and rear ends of the base (3), a turntable (4) is rotatably provided at the upper end of the base (3), a driving platform (1) is installed at the upper end of the turntable (4), a working chamber (7) is provided at the rear end of the base (3), a cover plate is installed at the rear side of the working chamber (7), a hydraulic mechanism, a rotary mechanism and a mud scraping mechanism are installed in the working chamber (7), the hydraulic mechanism is connected to the rotary mechanism and the mud scraping mechanism respectively, the rotary mechanism is fixedly connected to the turntable (4), and the mud scraping mechanism is in corresponding contact with the turntable (4); The hydraulic mechanism includes a hydraulic box (20), wherein the hydraulic box (20) stores hydraulic oil, an outlet 2 of the hydraulic box (20) is connected to a power pump 3 via a liquid outlet pipe 3, the power pump 3 is connected to an inlet 1 of an electromagnetic reversing valve 1 via a liquid outlet pipe 4, and an outlet 1 and an outlet 2 of the electromagnetic reversing valve 1 are respectively connected to an inlet and an outlet of a hydraulic telescopic cylinder 2 (23) via a liquid delivery pipe 1; The scraping mechanism includes an opening (6) connected to the working chamber (7), the opening (6) is arranged at the rear side of the upper end of the base (3), and a partition (14) is symmetrically provided on the left and right sides of the opening (6), and the lower ends of the partitions (14) on the left and right sides are fixedly connected to the partitions (9) on the left and right sides in a one-to-one correspondence. The partitions (9) on the left and right sides are symmetrically arranged on the left and right sides of the working chamber (7), and a scraping block (11) is slidably provided between the partitions (14) on the left and right sides. A hydraulic telescopic cylinder (23) is fixedly provided at the lower end of the scraping block (11), and the scraping block (11) is arranged correspondingly to the side end of the turntable (4); A pull rope (24) is symmetrically provided on the left and right sides of the lower end of the scraper block (11), and the pull rope (24) is connected to the guide wheel (25). The guide wheel (25) is rotatably set in the installation opening (58) and the installation seat (57) opened on the partition plate 2 (9). The installation seat (57) is fixedly connected to the partition plate 2 (9). The end of the pull rope (24) away from the scraper block (11) is fixedly connected to the lower end of the bearing block (10). The bearing block (10) is slidably set between the partition plate 2 (9) and the partition plate 3 (8). A plurality of telescopic buffer blocks (22) are fixedly provided between the bearing block (10) and the working chamber (7). The partition plate 3 (8) is symmetrically provided on the left and right sides of the working chamber (7). A fixed plate (12) is fixed on the front side between the partition plates 3 (8) on the left and right sides, and an opening 2 (13) is symmetrically provided on the left and right sides of the fixed plate (12).

2. The rotary hydraulic device for an excavator according to claim 1, characterized in that: The outlet 1 of the hydraulic box (20) is connected to the power pump 1 through the liquid outlet pipe 1, the power pump 1 is connected to the inlet of the two-position three-way valve through the liquid outlet pipe 2, the outlet 1 of the two-position three-way valve is connected to a plurality of liquid outlet branch pipes 1, the plurality of liquid outlet branch pipes 1 are connected to the inlet 1 of the plurality of electromagnetic reversing valves 3 in a one-to-one correspondence, the outlet 1 and outlet 2 of the plurality of electromagnetic reversing valves 3 are respectively connected to the inlet and outlet 1 of the plurality of hydraulic telescopic cylinders 1 (19) through a plurality of liquid delivery pipes 3, the return port of the plurality of electromagnetic reversing valves 3 is connected to the inlet 1 of the hydraulic box (20) through a plurality of liquid inlet pipes 1, the outlet 2 of the two-position three-way valve is connected to the temporary storage chamber (43) inside the temporary storage shell (40) through the liquid outlet branch pipe 2, the left and right sides of the temporary storage chamber (43) are respectively connected to the liquid infusion pipes (53), and the liquid infusion pipes (53) on the left and right sides are respectively connected to the liquid inlet pump (41) and the liquid outlet pump.

3. The rotary hydraulic device for an excavator according to claim 2, characterized in that: The return port of the electromagnetic reversing valve 1 is connected to the inlet 2 of the hydraulic box (20) through the liquid inlet pipe 2, the outlet 3 of the hydraulic box (20) is connected to the power pump 2 through the liquid outlet pipe 5, the power pump 2 is connected to the inlet 1 of the electromagnetic reversing valve 2 through the liquid outlet pipe 6, the outlet 1 and outlet 2 of the electromagnetic reversing valve 2 are respectively connected to the inlet and outlet of the hydraulic telescopic cylinder 3 (18) through the liquid delivery pipe 2, and the return port of the electromagnetic reversing valve 2 is connected to the inlet 3 of the hydraulic box (20) through the liquid inlet pipe 3.

4. The rotary hydraulic device for an excavator according to claim 1, characterized in that: A distance sensor is provided between the bearing block (10) and the working chamber (7), and the distance sensor is electrically connected to the two-position three-way valve, the liquid inlet pump (41), and the liquid outlet pump via controller 1.

5. The rotary hydraulic device for an excavator according to claim 3, characterized in that: A rotating shaft (27) is provided in the opening 2 (13), and a push plate (26) is provided on the left and right sides of the rotating shaft (27). The arc section of the push plate (26) contacts the arc section of the bearing block (10) respectively. The end of the push plate (26) away from the bearing block (10) is fixedly connected to the fixed block (30). The fixed block (30) is fixedly connected to the support seat 1 (31) through a plurality of springs 1 (32). The support seat 1 (31) is slidably connected to the push plate (26). The support seat 1 (31) is rotatably connected to the support seat 2 (54) through the rotating rod (29). The support seat 2 (54) is fixedly connected to the installation block (28). The block (28) is fixedly arranged on the front side of the rotating shaft (27), the mounting block (28) is fixedly connected to the connecting block 1 (17), the connecting block 1 (17) is fixedly connected to the hydraulic telescopic cylinder 1 (19) and the hydraulic telescopic cylinder 3 (18) through the connecting block 2 (16), the hydraulic telescopic cylinder 3 (18) is movably connected to the lower side of the fixed plate (12), the hydraulic telescopic cylinder 3 (18) is in corresponding contact with the pushing block (15), the pushing block (15) is arranged between the partition 2 (9) and the partition 3 (8), the sliding block of the pushing block (15) is slidably connected to the sliding cavity in the bearing block (10), and a spring 2 is fixedly provided between the sliding block and the sliding cavity.

6. The rotary hydraulic device for an excavator according to claim 2, characterized in that: The rotary mechanism includes a rotary shell (21), a mounting plate (33) is fixedly provided in a cavity inside the rotary shell (21), a hydraulic motor (5) is fixedly provided at the upper end of the mounting plate (33), a rotating portion in the hydraulic motor (5) is fixedly connected to the rotary table (4) and a connecting shaft (34), the connecting shaft (34) is arranged through the mounting plate (33), a liquid inlet of the hydraulic motor (5) is communicated with a liquid inlet pump (41), and a liquid outlet of the hydraulic motor (5) is communicated with a liquid outlet pump.

7. The rotary hydraulic device for an excavator according to claim 6, characterized in that: The lower end of the temporary storage shell (40) is fixedly provided with a fixed shell 1 (39), the lower end of the fixed shell 1 (39) is fixedly connected to the fixed shell 2 (36), the sealing cavity inside the fixed shell 1 (39) is communicated with the sealing cavity inside the fixed shell 2 (36), the sealing cavity inside the fixed shell 2 (36) is slidably connected to the sealing block (55), the sealing block (55) is fixedly connected to the friction block (35), the friction block (35) is in corresponding contact with the connecting shaft (34), the sealing block (55) is fixedly connected to the connecting plate (37), and the connecting plate (37) and the side end of the cavity are fixedly provided with a spring 3 (38).

8. The rotary hydraulic device for an excavator according to claim 7, characterized in that: The sealing chamber inside the fixed shell (39) is connected to the temporary storage chamber (43), and the sealing chamber inside the fixed shell (39) is symmetrically provided with sealing plates (44) on the left and right sides near one end of the temporary storage chamber (43). A support shaft is provided between the sealing plates (44) on the left and right sides for rotation. The end of the sealing plate (44) away from the support shaft is slidably connected to the sealing chamber inside the fixed shell (39). A telescopic rod is fixedly provided between the lower end of the support shaft and the sealing chamber inside the fixed shell (39). The upper end of the support shaft is fixedly connected to the matching block (52). The filter screen (48) is symmetrically provided on the left and right sides of the temporary storage chamber (43). The inclined section of the matching block (52) is symmetrically provided with contact blocks (51) on the left and right sides. The contact block (51) is slidably connected to the upper end of the temporary storage chamber (43). The matching block (52) is fixedly connected to the connecting block three (42). The connecting block three (42) passes through the temporary storage shell (4 0) and communicate with the outside world, connecting blocks 4 (56) are symmetrically provided on the left and right ends of the connecting block 3 (42), a plurality of spring rods (45) are fixedly provided between the connecting block 4 (56) and the upper end of the temporary storage shell (40), the connecting block 4 (56) is fixedly connected to the two connecting blocks 5 (46), the connecting block 5 (46) passes through the upper end of the temporary storage shell (40) into the temporary storage chamber (43) and is fixedly connected to the scraper (47), the scrapers (47) connected to the two connecting blocks 5 (46) are distributed on the left and right sides of the filter screen (48), the collecting shell (50) is symmetrically provided on the left and right sides of the lower end of the temporary storage shell (40), two collecting ports are communicated between the collecting shell (50) and the temporary storage chamber (43), and the collecting ports are distributed on the left and right sides of the filter screen (48), a blocking plate (49) is rotatably provided in the collecting port, and a spring 4 is fixedly provided between the blocking plate (49) and the side end of the collecting port.

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