CN110307465B - Sequential oil supply device and full-automatic lubricant injection device of excavator - Google Patents
Sequential oil supply device and full-automatic lubricant injection device of excavator Download PDFInfo
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- CN110307465B CN110307465B CN201910695358.3A CN201910695358A CN110307465B CN 110307465 B CN110307465 B CN 110307465B CN 201910695358 A CN201910695358 A CN 201910695358A CN 110307465 B CN110307465 B CN 110307465B
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- 238000002347 injection Methods 0.000 title claims abstract description 13
- 239000007924 injection Substances 0.000 title claims abstract description 13
- 239000000314 lubricant Substances 0.000 title description 6
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 230000001050 lubricating effect Effects 0.000 claims abstract description 10
- 239000004519 grease Substances 0.000 claims abstract description 8
- 210000001503 joint Anatomy 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 334
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 210000000245 forearm Anatomy 0.000 claims 1
- 239000010687 lubricating oil Substances 0.000 description 16
- 238000005461 lubrication Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
- F16N29/02—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems for influencing the supply of lubricant
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a sequential oil supply device which comprises a valve body, a valve rod and a driving assembly, wherein a valve cavity is arranged in the valve body, and the valve rod is installed in the valve cavity in a unidirectional rotation manner; the valve body is provided with a plurality of oil supply branches, and an oil inlet of each oil supply branch is communicated with the valve cavity; an oil supply main path is arranged in the valve rod, and an oil inlet of the oil supply main path is used for being connected with an oil supply unit; the driving component is arranged in the valve body and used for driving the valve rod to rotate for a preset angle each time, so that an oil outlet of an oil supply main path on the valve rod is in butt joint with an oil inlet of each oil supply branch in sequence. The invention also discloses a full-automatic lubricating grease injection device of the excavator, which comprises a plurality of oil supply channels, wherein each oil supply channel is provided with a switch assembly, one end of each oil supply channel is connected with an oil supply unit, and the other end of each oil supply channel is connected with a mechanism to be lubricated; at least one of the oil supply passages is provided with the sequential oil supply device as described above. The device provided by the invention has the advantages of simple structure, high oil supply reliability, high automation degree and the like.
Description
Technical Field
The invention mainly relates to the technical field of excavators, in particular to a sequential oil supply device and an automatic lubricant injection device of an excavator.
Background
An excavator belongs to heavy engineering machinery, also called excavating machinery (excavating machinery), also called an excavator, and is an earth moving machinery which excavates materials higher or lower than a bearing surface by a bucket, and loads the materials into a transport vehicle or unloads the materials to a storage yard. The materials excavated by the excavator are mainly soil, coal, silt and soil and rock after pre-loosening. Common excavators include backhoe and front shovel excavators, and according to the requirements of related technical standards, lubrication is required for each rotating part to ensure the reliability of rotation. At present, the oiling process is generally manual oiling, which is time-consuming and labor-consuming. Even if a part of automatic oil supply device exists, as the positions of the bucket of the excavator, which need to be lubricated, are more, as shown in fig. 1, the I-shaped frame is respectively connected with the bucket cylinder rod, the shovel bucket and the small arm, all the connecting positions (A, B, C, D in fig. 1 are all pin shafts), and each pin shaft generally needs to be supplied with oil at two points for lubrication, so that the automatic oil supply pipelines are more, and the maintenance is not facilitated; the pin shafts at all positions can swing during working, and if more hoses and the like are adopted for oil supply in automatic oil supply, the hoses are extremely easy to rotate and fatigue to damage in the long-term rotation process; in addition, the bucket is required to be contacted with soil or rock in the construction process, and oil supply pipelines such as hoses and the like are extremely easy to damage, so that oil supply cannot be continued.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems existing in the prior art, the invention provides the sequential oil supply device with simple structure, oil supply pipeline saving and high oil supply reliability and the full-automatic lubricant injection device of the excavator.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the sequential oil supply device comprises a valve body, a valve rod and a driving assembly, wherein a valve cavity is arranged in the valve body, and the valve rod is installed in the valve cavity in a unidirectional rotation manner; the valve body is provided with a plurality of oil supply branches, an oil inlet of each oil supply branch is communicated with the valve cavity, and an oil outlet of each oil supply branch is respectively connected with each mechanism to be lubricated; an oil supply main path is arranged in the valve rod, and an oil inlet of the oil supply main path is used for being connected with an oil supply unit; the driving assembly is arranged in the valve body and is used for driving the valve rod to rotate for a preset angle each time, so that an oil outlet of an oil supply main path on the valve rod is in butt joint with an oil inlet of each oil supply branch path in sequence.
As a further improvement of the above technical scheme:
the driving assembly comprises a plunger, a one-way ratchet, a rack and an elastic piece; one end of the rack is connected with the elastic piece, the other end of the rack is connected with the plunger, the one-way ratchet wheel is sleeved on the valve rod, and the rack is meshed with the one-way ratchet wheel; the valve body is internally provided with an installation cavity for installing the plunger, the rack and the elastic piece, the installation cavity where the plunger is positioned forms a plunger hole, and the plunger hole is connected with the oil supply unit; the valve body is provided with an oil supply pipeline, an oil inlet of the oil supply pipeline is communicated with the plunger hole, and the other end of the oil supply pipeline is communicated with an oil inlet of an oil supply main pipeline in the valve rod; and an oil inlet of the oil supply pipeline is positioned at the position of the plunger in a natural state.
The mounting cavity comprises a first cavity for mounting the elastic piece and a second cavity for mounting the rack; one end of the second cavity is communicated with the first cavity, and the other end of the second cavity is communicated with the plunger hole; the second cavity is formed with the step with the intercommunication department of first cavity and plunger hole for spacing to elastic component and plunger respectively.
The elastic piece is a spring.
The oil supply switch is positioned between the plunger hole and the oil supply unit; the oil supply switch comprises an oil supply pipe, an oil supply column, a driving mechanism and a reset piece, wherein the oil supply column is slidably arranged in the oil supply pipe, one end of the oil supply column is connected with the reset piece, the circumferential direction of the oil supply column is inwards recessed to form an annular channel, the oil supply pipe is provided with an oil filling hole, an oil outlet and an oil return hole, and the driving mechanism is used for driving the oil supply column to slide between an open state and a closed state; the oil filling hole and the oil outlet are communicated with the annular channel in an open state, and the oil outlet and the oil return hole are communicated with the annular channel in a closed state.
The driving mechanism is an electromagnet or a hydraulic unit; when the driving mechanism is an electromagnet, the electromagnet is positioned at one end of the oil supply pipe at one end of the reset piece; when the driving mechanism is a hydraulic unit, the hydraulic oil supply device is used for supplying hydraulic oil to one end of the oil supply pipe, which is opposite to the reset piece.
The reset piece is a spring.
The invention also discloses a full-automatic lubricating grease injection device of the excavator, which comprises a plurality of oil supply channels, wherein each oil supply channel is provided with a switch assembly, one end of each oil supply channel is connected with an oil supply unit, and the other end of each oil supply channel is connected with a mechanism to be lubricated; the valve body in the sequential oil supply device is arranged on a support arm connecting the small arm of the excavator with the oil cylinder rod, and oil outlets of all oil supply branches in the sequential oil supply device are respectively connected with a mechanism to be lubricated at the bucket of the excavator.
As a further improvement of the above technical scheme:
the device also comprises a detection piece for detecting the accumulated rotation angle or rotation times of each mechanism to be lubricated, and the detection piece is connected with the switch assembly on the corresponding oil supply channel.
The detection piece is an angle sensor or a photoelectric switch.
Compared with the prior art, the invention has the advantages that:
(1) The sequential oil supply device is suitable for supplying oil (lubricating oil or lubricating grease and the like) to each pin shaft at the position of the excavator bucket; the sequential oil supply device is used for supplying oil to each pin shaft at the position of the bucket, only one total oil supply pipeline is needed to supply the sequential oil supply device, and then each pin shaft is sequentially supplied by the sequential oil supply device.
(2) The sequential oil supply device adopts the sequential oil supply mode, realizes the pushing of the plunger by the pressure of lubricating oil, further rotates the valve rod and realizes the sequential switching of lubricating positions of all the same; the power needed by switching from the previous lubrication part to the next lubrication part is provided by the pressure of the lubricating oil, other power is not needed, the power is saved, a power device is omitted, and the structural design is ingenious.
(3) According to the sequential oil supply device, through the special design of the oil inlet position of the oil supply pipeline, after the lubrication position is switched, lubricating oil flows into the oil supply main pipeline through the oil supply pipeline and then flows into the position to be lubricated, namely, oil is not injected into the lubrication position in the switching process, so that the reliability of oil injection is ensured, the oil supply precision is also ensured, and the consumption of oil is reduced.
(4) According to the sequential oil supply device, through the limitation of the first cavity, the second cavity and the plunger holes, the displacement distance of each plunger can be ensured, so that the precision of the subsequent rotation angle of the valve rod is ensured, and the reliability of oil supply is ensured.
(5) The sequential oil supply device adopts a transmission matching mode of the rack and the unidirectional ratchet wheel, and has the advantages of simple integral structure, simple and convenient operation, stability and reliability.
(6) According to the sequential oil supply device, the oil supply switch capable of relieving pressure is arranged, so that the elastic piece can be reset smoothly, the oil supply main path and the oil supply branch path in the subsequent valve body are guaranteed to be in butt joint smoothly, and the reliability of oil supply is improved; the oil supply switch has simple integral structure and is easy to realize.
(6) The sequential oil supply device of the invention comprises two steps of overall oil supply: 1. firstly, switching oil supply branches; 2. oil supply is carried out after switching is completed; the two steps can be perfectly switched through the linkage fit of each structure, and the switching is realized by the self-contained pressure of lubricating oil without other power devices, so that the whole structure design is ingenious.
(7) The full-automatic lubricant injection device for the excavator, provided by the invention, adopts the sequential oil supply device to supply oil to each pin shaft at the bucket, has the advantages of the sequential oil supply device, and is simple in structure and easy to realize. The detection piece is used for detecting the accumulated rotation angle or rotation times of each mechanism to be lubricated, and oil is automatically supplied when the accumulated rotation angle or rotation times reach a preset value, so that an automatic oil supply program is improved, the oil supply reliability is improved, and the normal operation of the excavator is ensured.
Drawings
Fig. 1 is a schematic view of a mechanism to be lubricated at a bucket of a conventional excavator.
Fig. 2 is a sectional view showing a structure of a sequential oil supply apparatus according to an embodiment of the present invention.
Fig. 3 is a B-B view of fig. 2.
Fig. 4 is a view of fig. 2C-C.
Fig. 5 is a cross-sectional view of the oil supply switch according to the embodiment of the present invention.
Fig. 6 is a block diagram of an injection device according to an embodiment of the present invention.
The reference numerals in the figures denote: 1. a detecting member; 2. a control circuit board; 3. an oil supply unit; 4. a switch assembly; 5. a valve body; 501. a valve cavity; 502. an oil supply branch; 503. a first cavity; 504. a second cavity; 505. a plunger hole; 506. an oil supply line; 6. a valve stem; 601. an oil supply main path; 7. a drive assembly; 701. an elastic member; 702. a rack; 703. a one-way ratchet; 704. a plunger; 8. an oil supply switch; 801. an oil supply pipe; 802. an oil supply column; 8021. an annular channel; 803. an oil filling hole; 804. an oil outlet hole; 805. an oil return hole; 806. and a reset piece.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
As shown in fig. 2 to 4, the sequential oil supply device of the present embodiment includes a valve body 5, a valve rod 6 and a driving assembly 7, wherein a valve cavity 501 (in a T shape) is provided in the valve body 5, and the valve rod 6 is installed in the valve cavity 501 by unidirectional rotation (rotation in a counterclockwise direction in fig. 3 and 4); the valve body 5 is provided with a plurality of oil supply branches 502, oil inlets of the oil supply branches 502 are communicated with the valve cavity 501, and oil outlets of the oil supply branches 502 are respectively connected with mechanisms to be lubricated (such as rotating pins of excavator buckets and the like); an oil supply main path 601 is arranged in the valve rod 6, and an oil inlet of the oil supply main path 601 is used for being connected with an oil supply unit 3 (such as an oil supply pump); the driving component 7 is installed in the valve body 5, and is used for driving the valve rod 6 to rotate for a predetermined angle each time, so that the oil outlet of the oil supply main path 601 on the valve rod 6 is in butt joint with the oil inlets of the oil supply branches 502 in sequence.
The sequential oil supply device is suitable for supplying oil (lubricating oil or lubricating grease and the like) to each pin shaft at the position of the excavator bucket; the sequential oil supply device is used for supplying oil to each pin shaft at the position of the bucket, only one total oil supply pipeline is needed to supply the sequential oil supply device, and then each pin shaft is sequentially supplied by the sequential oil supply device.
In this embodiment, the drive assembly 7 includes a plunger 704, a one-way ratchet 703, a rack 702, and an elastic member 701; one end of a rack 702 is connected with the elastic piece 701, the other end of the rack 702 is connected with the plunger 704, the one-way ratchet 703 is sleeved on the valve rod 6, and the rack 702 is meshed with the one-way ratchet 703; the valve body 5 is internally provided with a mounting cavity for mounting the plunger 704, the rack 702 and the elastic piece 701, the mounting cavity where the plunger 704 is positioned forms a plunger hole 505, and the plunger hole 505 is connected with the oil supply unit 3; the valve body 5 is provided with an oil supply pipeline 506, an oil inlet of the oil supply pipeline 506 is communicated with the plunger hole 505, and the other end of the oil supply pipeline 506 is communicated with an oil inlet of an oil supply main path 601 in the valve rod 6; the oil inlet of the oil supply line 506 is located at the position of the plunger 704 in the natural state.
As shown in fig. 4, the mounting cavity includes a first cavity 503 for mounting the elastic member 701 and a second cavity 504 for mounting the rack 702; one end of the second cavity 504 is communicated with the first cavity 503, and the other end is communicated with the plunger hole 505; the second cavity 504 is formed with steps at the communication points with the first cavity 503 and the plunger hole 505, for limiting the elastic member 701 and the plunger 704, respectively. As shown in fig. 4, when oil (lubricating oil, lubricating grease, etc.) is supplied, the pressurized lubricating oil enters through one end G1 of the plunger hole 505, pushes the plunger 704 to move leftwards (at this time, the elastic member 701 is compressed), the rack 702 drives the one-way ratchet 703 to rotate, thereby driving the valve rod 6 to rotate, when the plunger 704 is pushed to stop at the step position, the valve rod 6 stops rotating, at this time, the oil outlet of the oil supply main path 601 in the valve rod 6 is butted with the oil inlet of one oil supply branch 502, the lubricating oil in the plunger hole 505 enters through the oil inlet of the oil supply path 506, flows out through the oil outlet G2, enters from the oil inlet G3 of the oil supply main path 601, and finally flows out through the oil outlet G4 of the oil supply branch 502, and is supplied to each mechanism to be lubricated; when the oil supply unit 3 (such as an oil supply pump) stops supplying oil, at this time, the elastic element 701 (such as a compression spring) resets, the rack 702 and the plunger 704 are pushed to move rightwards, at this time, the unidirectional ratchet 703 idles, the valve rod 6 is not moved, the plunger 704 moves rightwards, the compression spring returns to the step to stop moving, at this time, the plunger 704 is just positioned at the oil inlet of the oil supply pipeline 506, the oil inlet of the oil supply pipeline 506 is blocked, and the supply of lubricating oil is further stopped; similarly, the next oil supply is performed according to the above steps, and the valve rod 6 correspondingly rotates to be in butt joint with the next oil supply branch 502, so that each oil supply can be automatically switched to the next mechanism to be lubricated, and the sequential oil supply of each lubricating mechanism is realized.
The sequential oil supply device of the above embodiment adopts the sequential oil supply mode, and realizes pushing of the plunger 704 by the pressure of the lubricating oil, further rotates the valve rod 6, and realizes sequential switching of lubricating positions of all the same; the power needed by switching from the previous lubrication part to the next lubrication part is provided by the pressure of the lubricating oil, other power is not needed, the power is saved, the corresponding power device is correspondingly omitted, and the structure is simple and the design is ingenious.
According to the sequential oil supply device of the embodiment, through the optimal design of the oil inlet of the oil supply pipeline 506, after the lubrication position is switched, the oil inlet of the oil supply pipeline 506 is exposed, lubricating oil flows into the oil supply main pipeline 601 through the oil supply pipeline 506 and then flows into the position to be lubricated, namely, the lubricating position is not injected with oil in the switching process, so that the reliability of oil injection is ensured, the oil supply precision is also ensured, and the consumption of the oil is reduced.
According to the sequential oil supply device of the embodiment, through the limitation of the first cavity 503, the second cavity 504 and the plunger hole 505, the displacement distance between the elastic piece 701 and the plunger 704 can be ensured every time, so that the accurate adjustment of every rotation angle of the valve rod 6 is realized, the oil inlet main path on the valve rod 6 can be accurately abutted with the oil supply branch 502, and the reliability of oil supply is ensured.
The sequential oil supply device of the embodiment adopts a transmission matching mode of the rack 702 and the unidirectional ratchet 703, and has simple integral structure, simple and convenient operation, stability and reliability.
The sequential oil supply device of the above embodiment, the overall oil supply is divided into two steps: 1. switching the oil supply branch 502; 2. oil supply is carried out after switching is completed; the two steps can be perfectly switched through the linkage fit of each structure, and the switching is realized by the self-contained pressure of lubricating oil without other power devices, so that the whole structure design is ingenious.
In this embodiment, when the oil supply unit 3 (e.g., oil supply pump) supplies oil to the valve body 5, the oil supply switch 8 is installed in the pipe between the oil supply pump and the valve body 5 because the oil supply needs to be controlled. If the oil supply switch 8 adopts a conventional electromagnetic valve switch (quick switch), after the oil supply switch is turned off, a certain pressure still exists in the lubricating oil in the pipeline between the electromagnetic valve switch and the valve body 5, and due to the existence of the pressure, the elastic piece 701 can not be reset, so that when the oil is supplied next time, the plunger 704 can not move or the moved distance is smaller than the normal moving distance, so that the valve rod 6 can not rotate or the rotating angle is smaller, and further can not be smoothly butted with the next oil supply branch 502, and the normal oil supply can not be realized. To this end, there is provided an oil supply switch 8 capable of releasing the pressure at the plunger hole 505 after the oil supply is stopped, as shown in fig. 5, specifically including an oil supply pipe 801, an oil supply column 802, a driving mechanism and a reset member 806 (such as a compression spring), wherein the oil supply column 802 is slidably mounted in the oil supply pipe 801 and one end is connected to the reset member 806, the oil supply column 802 is recessed inward in the circumferential direction to form an annular channel 8021, the oil supply pipe 801 is provided with an oil filling hole 803 (K1 in fig. 5), an oil outlet hole 804 (K2 in fig. 5) and an oil return hole 805 (K3 in fig. 5), and the driving mechanism is used for driving the oil supply column 802 to slide between an open state (or open position) and a closed state (or closed position); the oil filler hole 803 and the oil outlet hole 804 communicate with the annular passage 8021 in the open state, and the oil outlet hole 804 and the oil return hole 805 communicate with the annular passage 8021 in the closed state. When the oil is supplied, the oil supply column 802 slides rightwards to a switch state through the driving mechanism, at the moment, the oil filling hole 803 and the oil outlet hole 804 are connected with the annular channel 8021, the oil return hole 805 is blocked, at the moment, the oil supplied by the oil supply pump enters the annular channel 8021 from the oil filling hole 803, and then flows into the plunger hole 505 from the oil outlet hole 804, so that the oil supply is started; after the oil supply is finished, the reset piece 806 drives the oil supply column 802 to slide leftwards to a closed position (a position shown in fig. 5), at this time, the oil outlet hole 804 and the oil return hole 805 are communicated with the annular channel 8021, the oil filling hole 803 is blocked, pressurized oil in the plunger hole 505 enters the annular channel 8021 through the oil outlet hole 804 and flows out through the oil return hole 805, so that the pressure of the oil in the plunger hole 505 is relieved, normal reset of the plunger 704 is ensured, and the reliability of subsequent oil supply is improved.
In this embodiment, the driving mechanism is an electromagnet or a hydraulic unit; when the driving mechanism is an electromagnet (not shown in the figure), the electromagnet is positioned at one end of the oil supply pipe 801 at the reset piece 806, and when the oil supply pipe needs to be started, the electromagnet is powered, and the oil supply column 802 slides rightwards to the starting state; when the solenoid is required to be closed, the solenoid is de-energized, and the oil supply column 802 is reset to the closed state under the action of the compression spring. Of course, in other embodiments, the driving mechanism may also use a hydraulic unit (such as a hydraulic pump), and supply hydraulic oil to the right side of the oil supply pipe 801, so as to drive the oil supply column 802 to slide to the right to an open state, and when the hydraulic pump stops supplying hydraulic oil, the oil supply column 802 is reset to a closed state under the action of a compression spring; the driving mechanism has simple integral structure and is easy to realize.
As shown in fig. 6, the invention also discloses a full-automatic lubricant injection device of the excavator, which comprises a plurality of oil supply channels, wherein each oil supply channel is provided with a switch assembly 4, one end of each oil supply channel is connected with an oil supply unit 3, and the other end of each oil supply channel is used for being connected with a mechanism to be lubricated; the above-mentioned sequential oil supply device (G in fig. 6) is arranged on at least one oil supply channel, the valve body 5 in the sequential oil supply device is mounted on a support arm (each structure is shown in fig. 1) connecting the small arm of the excavator with the oil cylinder rod, and the oil outlets of the oil supply branches 502 on the valve body 5 are respectively connected with oil filling ports of the pins at the bucket of the excavator (such as pins at two A, B positions shown in fig. 6, and two oil filling ports are corresponding to each pin). Specifically, the oil supply unit 3 is a 24V oil supply pump, and can supply several tens MPa of lubricating oil. The total oil supply pipeline is arranged on the small arm, the oil supply pipeline is connected to the valve body 5 on the support arm through an adapter (a conventional metal oil supply adapter, a sealing pipeline is arranged in the adapter and the valve body can rotate), and the oil outlets of the oil supply branches 502 on the valve body 5 are all connected to the pin roll oil filling port at the A, B position through pipelines (such as steel pipes) and the adapter. In order to ensure that each pipeline and the adapter are not damaged by external foreign matters, a high-strength steel cover is adopted for protection. Each switch assembly 4 may employ a solenoid valve or an oil supply switch 8 as described above (e.g., K0 in fig. 6).
In this embodiment, the device further comprises a detecting member 1 for detecting the cumulative rotation angle of each mechanism to be lubricated, and the detecting member 1 is connected with the switch assembly 4 on the corresponding oil supply channel. Specifically, the detecting element 1 is an angle sensor (S1-S3 in fig. 6), and detects the cumulative value of the rotation angles of each rotating component (such as a big arm, a small arm, a turntable, etc.), and sends the cumulative value to the control circuit board 2 (such as a conventional single chip microcomputer, etc., and compares the cumulative value by using a comparator), and after a certain value (determined by test measurement or working experience) is reached, sends a switching signal to the corresponding oil circuit switch K (such as K1-K13 in fig. 6) by the control circuit board 2, so that automatic oil supply to the corresponding lubrication part is realized, and the reliability of oil supply is ensured. Of course, in other embodiments, the detecting element 1 may also adopt a photoelectric switch, by counting the number of rotations of the rotating element, when the count reaches a certain value (determined experimentally or empirically), the control circuit board 2 sends a switching signal to the corresponding oil circuit switch K and the oil supply pump, so as to realize automatic oil supply to the corresponding lubrication part.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (7)
1. The sequential oil supply device is characterized by comprising a valve body (5), a valve rod (6) and a driving assembly (7), wherein a valve cavity (501) is arranged in the valve body (5), and the valve rod (6) is installed in the valve cavity (501) in a unidirectional rotation mode; a plurality of oil supply branches (502) are arranged on the valve body (5), oil inlets of the oil supply branches (502) are communicated with the valve cavity (501), and oil outlets of the oil supply branches (502) are respectively connected with mechanisms to be lubricated; an oil supply main path (601) is arranged in the valve rod (6), and an oil inlet of the oil supply main path (601) is connected with the oil supply unit (3); the driving assembly (7) is arranged in the valve body (5) and is used for driving the valve rod (6) to rotate for a preset angle each time so that an oil outlet of the oil supply main path (601) on the valve rod (6) is in butt joint with an oil inlet of each oil supply branch path (502) in sequence;
the driving assembly (7) comprises a plunger (704), a one-way ratchet wheel (703), a rack (702) and an elastic piece (701); one end of the rack (702) is connected with the elastic piece (701), the other end of the rack is connected with the plunger (704), the unidirectional ratchet wheel (703) is sleeved on the valve rod (6), and the rack (702) is meshed with the unidirectional ratchet wheel (703); the valve body (5) is internally provided with a mounting cavity for mounting the plunger (704), the rack (702) and the elastic piece (701), the mounting cavity where the plunger (704) is positioned forms a plunger hole (505), and the plunger hole (505) is connected with the oil supply unit (3); an oil supply pipeline (506) is arranged on the valve body (5), an oil inlet of the oil supply pipeline (506) is communicated with the plunger hole (505), and the other end of the oil supply pipeline is communicated with an oil inlet of an oil supply main path (601) in the valve rod (6); the oil inlet of the oil supply pipeline (506) is positioned at the position of the plunger (704) in a natural state;
the mounting cavity comprises a first cavity (503) for mounting the elastic member (701) and a second cavity (504) for mounting the rack (702); one end of the second cavity (504) is communicated with the first cavity (503), and the other end is communicated with the plunger hole (505); steps are formed at the communication positions of the second cavity (504), the first cavity (503) and the plunger hole (505), and are used for limiting the elastic piece (701) and the plunger (704) respectively;
the elastic piece (701) is a spring.
2. The sequential oil supply device according to claim 1, further comprising an oil supply switch (8), the oil supply switch (8) being located between the plunger hole (505) and the oil supply unit (3); the oil supply switch (8) comprises an oil supply pipe (801), an oil supply column (802), a driving mechanism and a reset piece (806), wherein the oil supply column (802) is slidably installed in the oil supply pipe (801) and one end of the oil supply column is connected with the reset piece (806), an annular channel (8021) is formed by inwards sinking the oil supply column (802) in the circumferential direction, an oil filling hole (803), an oil outlet (804) and an oil return hole (805) are formed in the oil supply pipe (801), and the driving mechanism is used for driving the oil supply column (802) to slide between an open state and a closed state; the oil filling hole (803) and the oil outlet hole (804) are communicated with the annular channel (8021) in an open state, and the oil outlet hole (804) and the oil return hole (805) are communicated with the annular channel (8021) in a closed state.
3. The sequential oil supply apparatus according to claim 2, wherein the drive mechanism is an electromagnet or a hydraulic unit; when the driving mechanism is an electromagnet, the electromagnet is positioned at one end of the oil supply pipe (801) at the reset piece (806); when the driving mechanism is a hydraulic unit, the hydraulic oil supply device is used for supplying hydraulic oil to one end of the oil supply pipe (801) relative to the reset piece (806).
4. A sequential oil supply apparatus as claimed in claim 2, characterized in that the return element (806) is a spring.
5. The full-automatic lubricating grease injection device for the excavator is characterized by comprising a plurality of oil supply channels, wherein a switch assembly (4) is arranged on each oil supply channel, one end of each oil supply channel is connected with an oil supply unit (3), and the other end of each oil supply channel is connected with a mechanism to be lubricated; the sequential oil supply device as claimed in any one of claims 1 to 4 is arranged on at least one oil supply channel, wherein a valve body (5) in the sequential oil supply device is arranged on a support arm for connecting an excavator forearm with an oil cylinder rod, and oil outlets of oil supply branches (502) in the sequential oil supply device are respectively connected with a mechanism to be lubricated at a bucket of the excavator.
6. The full-automatic grease injecting device for an excavator according to claim 5, further comprising a detecting member (1) for detecting the cumulative rotation angle or the number of rotations of each mechanism to be lubricated, wherein the detecting member (1) is connected with the switch assembly (4) on the corresponding oil supply passage.
7. The full-automatic grease injection device for an excavator according to claim 6, wherein the detecting member (1) is an angle sensor or a photoelectric switch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910695358.3A CN110307465B (en) | 2019-07-30 | 2019-07-30 | Sequential oil supply device and full-automatic lubricant injection device of excavator |
| PCT/CN2020/105127 WO2021018131A1 (en) | 2019-07-30 | 2020-07-28 | Sequential oil supply device and fully automatic lubricant injection device for excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910695358.3A CN110307465B (en) | 2019-07-30 | 2019-07-30 | Sequential oil supply device and full-automatic lubricant injection device of excavator |
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| Publication Number | Publication Date |
|---|---|
| CN110307465A CN110307465A (en) | 2019-10-08 |
| CN110307465B true CN110307465B (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910695358.3A Active CN110307465B (en) | 2019-07-30 | 2019-07-30 | Sequential oil supply device and full-automatic lubricant injection device of excavator |
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| Country | Link |
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| CN (1) | CN110307465B (en) |
| WO (1) | WO2021018131A1 (en) |
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| CN110307465B (en) * | 2019-07-30 | 2024-01-26 | 王定根 | Sequential oil supply device and full-automatic lubricant injection device of excavator |
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| Publication number | Publication date |
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| CN110307465A (en) | 2019-10-08 |
| WO2021018131A1 (en) | 2021-02-04 |
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