Energy-saving self-lubricating device and lubricating method for excavator and excavator

Abstract

The invention discloses an energy-saving self-lubricating device and method for an excavator and the excavator. The energy-saving self-lubricating device comprises an oil storage tank, a lubricating pump, an electromagnetic valve, a distributor and an energy conversion device. The oil storage tank is used for containing lubricating grease; an oil inlet of the lubricating pump is communicated with the oil storage tank; a first oil port of the electromagnetic valve is communicated with an oil outlet of the lubricating pump, and a third oil port of the electromagnetic valve is communicated with the oil storage tank; one end of the distributor is communicated with the second oil port of the electromagnetic valve, and the other end of the distributor is communicated with each lubricating point; one end of the energy conversion device is connected with the movable arm, the other end of the energy conversion device is connected to the rotary table, a rotary shaft of the lubricating pump is connected with the energy conversion device, the energy conversion device converts potential energy generated when the movable arm descends into mechanical energy for driving the lubricating pump, lubricating grease is injected into all lubricating point positions, power waste is avoided, and the energy utilization rate is increased. And the device is simple in mechanical structure, low in manufacturing cost, firm and durable, and greatly meets the lubricating requirement of the excavator.

Description

Technical Field

[0001] The invention relates to the field of excavator lubrication, and in particular to an energy-saving self-lubricating device and method for an excavator. Background Art

[0002] The lubrication system is a very important component of the excavator, especially for the relative moving positions such as the excavator's working device and turntable. For example, the excavator's working device is the device that directly works on the excavator. Its various hinges rotate frequently relative to each other, and the forces and loads it bears are large. The working conditions are harsh, and it is necessary to continuously add grease between the pins and bearings of the hinges to reduce friction, reduce wear, etc., thereby greatly increasing the service life.

[0003] For the various centralized lubrication systems of excavators, it all comes down to using different devices to inject grease into designated locations. At present, there are mainly manual lubrication and automatic centralized lubrication. Manual lubrication mainly uses grease adding tools to manually inject grease into lubrication points or centralized blocks at designated locations. This method is simple and low in cost, but the lubrication cycle interval of the excavator working device is short, and it is necessary to stop the machine regularly for greasing, which consumes working time and manpower. Once greasing is forgotten, it will cause the pin shaft position to wear more severely; compared with manual grease filling, the fully automatic centralized lubrication system uses an electric motor to drive the lubrication pump to add grease, and the filling time and amount are controlled by the program, which saves working time and manpower, but its cost is higher and the oil storage tank is smaller. At the same time, it is also necessary to use an electric motor to drive the lubrication pump to work, which increases the cost of using the vehicle. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an energy-saving self-lubricating device and method for an excavator, which utilizes the potential energy of the excavator boom descending to convert it into mechanical energy for driving a lubrication pump, injects grease into the lubrication points, and realizes self-lubrication.

[0005] The present invention is implemented according to the following technical solutions:

[0006] In a first aspect, the present invention provides an energy-saving self-lubricating device for an excavator, comprising:

[0007] A storage tank for containing grease;

[0008] A lubrication pump, the oil inlet of which is connected to the oil storage tank;

[0009] A solenoid valve, wherein a first oil port thereof is connected to an oil outlet of the lubrication pump, and a third oil port thereof is connected to the oil storage tank;

[0010] A distributor, one end of which is connected to the second oil port of the solenoid valve, and the other end of which is connected to each lubrication point;

[0011] An energy conversion device has one end connected to the boom and the other end connected to the turntable. The rotating shaft of the lubrication pump is connected to the energy conversion device. The energy conversion device converts the potential energy of the boom's descent into mechanical energy to drive the lubrication pump to inject grease into various lubrication points.

[0012] In some embodiments, the energy conversion device comprises:

[0013] A bracket, fixed on the turntable;

[0014] The telescopic rod is composed of a sleeve and a pull rod, the front end of the pull rod is hinged to the ear plate on the boom, and the rear end of the sleeve is hinged to the bracket;

[0015] A support block, fixed on the front end side of the sleeve;

[0016] The power component has one end fixed on the front end of the pull rod and the other end supported on the support block, and the two are movably connected so that the power component can perform telescopic movement with the pull rod, thereby driving the lubrication pump to rotate.

[0017] In some embodiments, the power component is a rack, the lubrication pump is fixed on the sleeve, a gear is fixed on the rotating shaft of the lubrication pump, the gear is meshed with the rack, and the lubrication pump is driven to rotate by converting the telescopic movement of the rack into the rotational movement of the gear; the rotation speed of the lubrication pump is adjusted by changing the size of the gear, thereby achieving the adjustment of the flow rate of the lubrication pump.

[0018] In some embodiments, an elongated slide groove is provided on the bottom surface of the rack, and an embedded roller is provided on the top surface of the support block. The roller extending from the top surface of the support block is inserted into the elongated slide groove. The cooperation between the two enables the rack to slide on the support block.

[0019] In some embodiments, a one-way brake component is installed between the gear and the rotating shaft of the lubrication pump; when the boom is raised, the pull rod extends outward in the sleeve, and under the action of the one-way brake component, the rotating shaft of the lubrication pump does not rotate with the gear but remains stationary; when the boom is lowered, the pull rod contracts inward in the sleeve, and under the action of the one-way brake component, the rotating shaft of the lubrication pump rotates with the gear.

[0020] In some embodiments, the one-way braking component is a ratchet bearing, the rotating shaft of the lubrication pump is fixed in the inner ring of the ratchet bearing, and the gear is fixed on the outer ring of the ratchet bearing; when the boom is raised, the pull rod is retracted to drive the rack to move, the ratchet bearing rotates forward, and the lubrication pump stops working; when the boom is lowered, the pull rod is extended to drive the rack to move, the ratchet bearing is in reverse lock, and the gear rotates to drive the lubrication pump to work.

[0021] In some embodiments, the solenoid valve is a two-position three-way solenoid valve, and the action of its valve position is controlled by connecting a counter; when the first and second oil ports of the two-position three-way solenoid valve are connected and the boom is lowered, the lubrication pump is driven to inject grease into each lubrication point to achieve self-lubrication; when the first and third oil ports of the two-position three-way solenoid valve are connected and the boom is lowered, the lubrication pump is driven to flow the grease from the oil storage tank through the lubrication pump and the solenoid valve back to the oil storage tank to complete self-circulation. The lubrication cycle is set in the timer, and the switching between the self-lubrication process and the self-circulation process is completed by controlling the power on and off of the solenoid valve.

[0022] In a second aspect, the present invention provides an excavator equipped with the above-mentioned excavator energy-saving self-lubricating device.

[0023] In a third aspect, the present invention provides a lubrication method based on the above-mentioned energy-saving self-lubricating device for an excavator, wherein the lubrication method includes an intermittent lubrication method, and the intermittent lubrication method is divided into a self-lubricating method and a self-circulating method;

[0024] The self-lubricating method comprises the following processes:

[0025] 1) The timer controls the solenoid valve to be energized so that the first and second oil ports are connected, and the boom is lowered. Under the action of the energy conversion device, the lubrication pump is driven to inject grease into each lubrication point to achieve self-lubrication;

[0026] 2) The timer still controls the solenoid valve to be energized, the boom is lifted, and the lubrication pump is stopped at this time;

[0027] The self-circulation method includes the following processes:

[0028] 1) The timer controls the solenoid valve to cut off the power so that the first and third oil ports are connected, and the boom is lowered. Under the action of the energy conversion device, the lubrication pump is driven to work and the grease flows from the oil storage tank through the lubrication pump and the solenoid valve back to the oil storage tank, completing the self-circulation;

[0029] 2) The timer still controls the solenoid valve to be in the power-off state, the boom is raised, and the lubrication pump is in the stopped working state;

[0030] The lubrication cycle is set in the timer connected to the solenoid valve, and the switching between the self-lubrication process and the self-circulation process is completed by controlling the power on and off of the solenoid valve;

[0031] In some embodiments, the lubrication method further comprises a continuous lubrication method, which comprises the following process:

[0032] Cancel the access of the solenoid valve, directly connect the oil storage tank to the inlet of the lubrication pump, connect the outlet of the lubrication pump to the distributor, and adjust the flow of the lubrication pump to control the lubrication amount of the lubrication pump every time the boom is lowered, so as to achieve continuous lubrication of the excavator.

[0033] Beneficial effects of the present invention:

[0034] The present invention realizes the conversion of the potential energy of the excavator boom's descent into mechanical energy for driving the lubrication pump, thereby realizing energy recovery and utilization of the excavator, avoiding power waste and improving energy utilization. At the same time, the device has sufficient power, a large-capacity oil storage tank can be designed, and a variety of lubrication modes can be configured. The speed of the lubrication pump can be adjusted by replacing gears as needed. In addition, the device has a simple mechanical structure, low manufacturing cost, and is durable, which greatly meets the lubrication requirements of the excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] In the attached picture:

[0037] Figure 1 It is a schematic diagram of the manual lubrication structure of the present invention.

[0038] Figure 2 This is a schematic diagram of the semi-automatic centralized lubrication structure of the present invention;

[0039] Figure symbols: 21, central block; 22, oil nozzle; 23, joint; 24 lubrication hose; 25, joint at lubrication point.

[0040] Figure 3 This is a schematic diagram of the fully automatic centralized lubrication structure of the present invention;

[0041] Figure symbols: 31, boom; 32, distributor; 33, filter; 34, lubrication pump; 35, turntable; 36, lubrication point at the root of the boom.

[0042] Figure 4 It is a top view of the energy-saving self-lubricating device for excavators of the present invention;

[0043] Figure 5 for Figure 4 AA surface section view in;

[0044] Figure symbols: 41, energy conversion device; 42, lubrication pump; 43, oil storage tank; 44, distributor; 45, boom; 46, turntable; 47, lubrication hose; 48, gear; 49, ratchet bearing; 410, solenoid valve.

[0045] Figure 6It is a schematic diagram of the energy conversion device of the present invention;

[0046] Figure symbols: 51, telescopic rod; 52, bracket; 53, rack; 54 support block.

[0047] Figure 7 A schematic diagram of a ratchet bearing of the present invention;

[0048] Figure 8 It is a schematic diagram of the telescopic rod of the present invention;

[0049] Figure symbols: 511, sleeve; 512, pull rod; 513, support block installation point; 514, lubrication pump installation point; 515, rack installation point.

[0050] Fig. 9 A schematic diagram of a rack according to the present invention;

[0051] Figure identification: 531, long slide.

[0052] Fig.10 It is a schematic diagram of a support block of the present invention;

[0053] Figure identification: 541, roller.

[0054] Fig.11 It is a schematic diagram of the excavator boom of the present invention being lowered to the limit position;

[0055] Fig.12 It is a schematic diagram of the excavator boom of the present invention being lifted to the limit position;

[0056] Fig.13 The three-dimensional effect of the energy-saving self-lubricating device for excavators of the present invention Figure 1 ;

[0057] Fig.14 The three-dimensional effect of the energy-saving self-lubricating device for excavators of the present invention Figure 2 ;

[0058] Fig.15 This is a self-lubricating principle diagram of the energy-saving self-lubricating device for an excavator of the present invention;

[0059] Fig.16 This is a self-circulation principle diagram of the energy-saving self-lubricating device for an excavator of the present invention;

[0060] Fig.17 This is a schematic diagram of the continuous lubrication principle of the energy-saving self-lubricating device for an excavator of the present invention.

[0061] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0063] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] At present, the main lubrication methods for excavators are manual lubrication, semi-automatic and fully automatic centralized lubrication. For manual lubrication and semi-automatic centralized lubrication solutions: Manual lubrication such as Figure 1 As shown, the oil nozzle at the hinge position is directly filled; semi-automatic centralized lubrication is as follows Figure 2 As shown, the lubrication points of each hinge are connected to the lubrication hose 24 (the lubrication hose 24 is connected to the connector 25 at the lubrication point), the lubrication hose 24 is uniformly connected to the central block 21 (the lubrication hose 24 is connected to the connector 23), and then the lubrication grease is added to each lubrication pipe through the grease nozzle 22. Figure 3 As shown, for fully automatic centralized lubrication, the form is mostly that one end of the lubrication hose is connected to the lubrication point 36 at the root of the boom, and the other end is connected to the distributor 32 (installed on the boom 31), and the motor-driven lubrication pump 34 (installed on the turntable 35, the outlet of the lubrication pump 34 is connected to the filter 33, and the inlet of the lubrication pump 34 is connected to the oil storage tank) inputs grease into the distributor 32, and then the distributor 32 transports the grease to various lubrication points.

[0066] However, the lubrication cycle interval of the excavator is short. The use of manual lubrication and semi-automatic centralized lubrication requires the machine to be shut down and grease to be added to each lubrication point. This process wastes working hours and manpower. Some customers are tired of repeated manual greasing, which reduces the number of lubrication times and shortens the service life of the excavator. Fully automatic centralized lubrication requires motor drive, which consumes energy. Its production and supporting costs are high. In the case of long lubrication pipelines, the oil cannot be pumped. At the same time, the energy of the excavator working device cannot be reasonably recycled when it descends, which will cause energy waste.

[0067] like Figure 4 , Figure 5 , Fig.13 , Fig.14 As shown, in response to the above problems, the present invention provides an energy-saving self-lubricating device for an excavator, comprising an oil storage tank 43, a lubrication pump 42, a solenoid valve 410, a distributor 44 and an energy conversion device 41; the oil storage tank 43 is used to contain grease; the oil inlet of the lubrication pump 42 is connected to the oil storage tank 43; the first oil port of the solenoid valve 410 is connected to the oil outlet of the lubrication pump 42, and the third oil port is connected to the oil storage tank 43; one end of the distributor 44 is connected to the second oil port of the solenoid valve 410, and the other end is connected to each lubrication point; one end of the energy conversion device 41 is connected to the boom 45, and the other end is connected to the turntable 46; the rotating shaft of the lubrication pump 42 is connected to the energy conversion device 41, and the energy conversion device 41 converts the potential energy of the boom 45 descending into mechanical energy to drive the lubrication pump 42, so as to inject grease into each lubrication point.

[0068] The present invention realizes the reasonable recovery and utilization of potential energy when the boom is lowered. The energy conversion device converts the potential energy of the boom's descent into mechanical energy to drive the lubrication pump to work. The timer controls the solenoid valve to switch the valve position to realize self-lubrication and self-circulation, which greatly saves work time and cost, avoids energy waste, and improves energy utilization.

[0069] It should be noted that the lubrication pump 42 , the solenoid valve 410 , the oil storage tank 43 , the distributor 44 and the lubrication points are all connected via a lubrication hose 47 .

[0070] The specific structure of the above energy conversion device is further described below.

[0071] like Figure 6 , Figure 8As shown, the energy conversion device 41 includes a bracket 52, a telescopic rod 51, a support block 54 and a power component; the bracket 52 is fixed on the turntable 46; the telescopic rod 51 is composed of a sleeve 511 and a pull rod 512, the front end of the pull rod 512 is hinged to the ear plate on the boom 45 through a pin, and the rear end of the sleeve 511 is hinged to the ear plate on the bracket 52 through a pin; the support block 54 is fixed on the front end side of the sleeve 511 (i.e., the installation support block point 513 in the accompanying drawings); one end of the power component is fixed to the front end of the pull rod 512 by bolts, and the other end is supported on the support block 54, and the two are movably connected, so that the power component can perform telescopic movement with the pull rod 512, thereby driving the lubrication pump 42 to rotate.

[0072] It should be noted that the installation position and form of the bracket 52 are not limited to the position and form shown in the drawings, as long as the limited space can be reasonably used to place the telescopic rod and the support block.

[0073] Further solutions, such as Figure 5 , Figure 6 As shown, the power component is a rack 48, which is fixed to the front end of the pull rod 512 by bolts (i.e., the installation point 515 of the rack in the figure), and the lubrication pump 42 is fixed on the sleeve 511 (i.e., the installation point 514 of the lubrication pump in the figure). A gear 48 is fixed on the rotating shaft of the lubrication pump 42, and the gear 48 is meshed with the rack 53. The telescopic movement of the rack 53 is converted into the rotational movement of the gear 48 to drive the lubrication pump 42 to rotate; the rotation speed of the lubrication pump 42 is adjusted by changing the size of the gear 48, and then the flow rate of the lubrication pump 42 is adjusted.

[0074] Further solutions, such as Fig. 9 , Fig.10 As shown, a long slide groove 531 is provided on the bottom surface of the rack 53, and an embedded roller 541 is provided on the top surface of the support block 54. The roller 541 extending from the top surface of the support block 54 is inserted into the long slide groove 531. The cooperation between the two enables the rack 53 to slide on the support block 54.

[0075] Further solutions, such as Figure 5 , Figure 6 As shown, a one-way brake component is installed between the gear 48 and the rotating shaft of the lubrication pump 42; when the boom 45 is lifted, the pull rod 512 extends outward in the sleeve 511, and at this time, under the action of the one-way brake component, the rotating shaft of the lubrication pump 42 does not rotate with the gear 48, but remains stationary; when the boom 45 is lowered, the pull rod 512 contracts inward in the sleeve 511, and at this time, under the action of the one-way brake component, the rotating shaft of the lubrication pump 42 rotates with the gear 48.

[0076] The preferred solution is Figure 7As shown, the one-way braking component is a ratchet bearing 49, the rotating shaft of the lubrication pump 42 is fixed in the inner ring of the ratchet bearing 49, and the gear 48 is fixed on the outer ring of the ratchet bearing 49; the boom 45 is lifted, the pull rod 512 is retracted to drive the rack 53 to move, the ratchet bearing 49 rotates forward, and the lubrication pump 42 stops working; the boom 45 is lowered, the pull rod 512 is extended to drive the rack 53 to move, the ratchet bearing 49 is in reverse locking, and the gear 48 rotates to drive the lubrication pump 42 to work.

[0077] It should be noted that if Fig.11 , Fig.12 As shown, the ratchet bearing 49 is installed on the rotating shaft of the lubrication pump 42, and the outer ring of the ratchet bearing 49 is installed with a gear 48. When the boom 45 is lowered, the gear 48 is driven to rotate through the energy conversion device. At this time, the ratchet bearing 49 is reversed and locked, driving the lubrication pump 42 to work; when the boom 45 is raised, the ratchet bearing 49 rotates forward, the rotating shaft of the lubrication pump 42 is stationary, the lubrication pump 42 does not work, and does not consume the power of the excavator; the self-lubricating device is installed between the boom 45 and the turntable 46, which makes reasonable use of space and does not cause interference. There are multiple lubrication schemes to choose from. When the solenoid valve 410 is connected, timed lubrication can be achieved; when the solenoid valve 410 is not connected to the lubrication pipeline, the oil outlet of the lubrication pump 42 is directly connected to the distributor 44 to adjust the flow of the lubrication pump 42 to achieve continuous lubrication.

[0078] Further solutions, such as Fig.15 , Fig.16 As shown, the solenoid valve 410 is a two-position three-way solenoid valve, and the action of its valve position is controlled by connecting a counter; when the first and second oil ports of the two-position three-way solenoid valve are connected and the boom 45 is lowered, the lubrication pump 42 is driven to inject grease into each lubrication point to achieve self-lubrication; when the first and third oil ports of the two-position three-way solenoid valve are connected and the boom 45 is lowered, the lubrication pump 42 is driven to flow the grease from the oil storage tank 43 through the lubrication pump 42 and the solenoid valve 410 back to the oil storage tank 43 to complete the self-circulation. The lubrication cycle is set in the timer, and the switching between the self-lubrication process and the self-circulation process is completed by controlling the solenoid valve to be energized and de-energized.

[0079] like Fig.11 , Fig.12 , Fig.15 , Fig.16 , Fig.17As shown, the present invention also provides a lubrication method based on the above-mentioned energy-saving self-lubricating device of the excavator. The general process is: when lubrication starts, the potential energy of the excavator boom is converted into mechanical energy through the energy conversion device to drive the lubrication pump to work, and the two-position three-way solenoid valve is connected to the distributor of the excavator to each lubrication pipeline to achieve lubrication; when the boom is raised, since the ratchet bearing installed on the shaft of the lubrication pump rotates forward, the pump remains stationary, so the boom lifting process does not consume the power of the excavator. When lubrication stops, the oil outlet of the lubrication pump is connected to the oil storage tank through the two-position three-way solenoid valve to enter the self-circulation, so as to achieve the effect of stirring the grease; the solenoid valve is connected to the timer to control the lubrication cycle, and the pump flow rate can be adjusted by changing the size of the gear. The lubrication pump can also be directly connected to the distributor to adjust the lubrication amount to achieve continuous lubrication of the excavator.

[0080] The specific process of the above lubrication method is further described below.

[0081] Lubrication methods include intermittent lubrication methods and continuous lubrication methods;

[0082] Intermittent lubrication solution:

[0083] Self-lubricating process:

[0084] (1) The timer control solenoid valve is energized in valve position 1. Fig.15 As shown, the boom descends, the telescopic rod of the energy conversion device stretches the rack following the movement of the pull rod, the ratchet bearing is in reverse locking, the gear rotates to drive the lubrication pump to work, and the grease flows from the oil storage tank through the lubrication pump and the solenoid valve, into the distributor, and flows to each lubrication point.

[0085] (2) The timer still controls the solenoid valve to be energized and in valve position 1. The boom is raised, the telescopic rod is shortened, the rack moves backward following the pull rod, the ratchet bearing rotates forward, the lubrication pump shaft is stationary, and the lubrication pump stops working.

[0086] Self-circulating process:

[0087] (1) The timer controls the solenoid valve to be powered off and in valve position 2. Fig.16 As shown, the boom descends, the telescopic rod of the energy conversion device stretches the rack following the movement of the pull rod, the ratchet bearing is in reverse locking, the gear rotates to drive the lubrication pump to work, and the grease flows from the oil storage tank through the lubrication pump and the solenoid valve back to the oil storage tank, completing the self-circulation.

[0088] (2) The timer still controls the solenoid valve to be in the power-off state. The solenoid valve is in valve position 2. The boom is raised, the telescopic rod is shortened, the rack moves backward following the pull rod, the ratchet bearing rotates forward, and the lubrication pump shaft is stationary.

[0089] The lubrication pump has stopped working.

[0090] The lubrication cycle is set in the timer connected to the solenoid valve, and the switching between the self-lubrication process and the self-circulation process is completed by controlling the power on and off of the solenoid valve.

[0091] Continuous lubrication solutions:

[0092] Cancel the access of the solenoid valve, directly connect the oil storage tank to the inlet of the lubrication pump, connect the outlet of the lubrication pump to the distributor, and adjust the flow of the lubrication pump to control the lubrication amount of the pump every time the boom is lowered, so as to achieve continuous lubrication of the excavator. Fig.17 shown.

[0093] In summary, the present invention provides an energy-saving self-lubricating device and a lubricating method for an excavator, which achieve the following functions and effects:

[0094] 1. The potential energy of the excavator boom descending is converted into mechanical energy to drive the lubrication pump through the energy conversion device, and grease is pumped to various lubrication points such as the excavator working device. This process realizes the energy recovery of the excavator.

[0095] 2. A ratchet bearing is installed on the shaft of the lubrication pump. When the boom is raised, the rack engages with the gear on the ratchet bearing to make the bearing rotate forward, while the lubrication pump remains stationary and does not consume the power when the boom is raised; when the boom is lowered, the ratchet bearing reverses, and the gear drives the shaft of the lubrication pump to rotate and pump oil.

[0096] 3. A two-position three-way solenoid valve is connected to the lubrication pipeline. When lubrication is in progress, the grease in the oil storage tank flows into the solenoid valve through the pump and then to the distributor to complete the lubrication work. When lubrication is stopped, the solenoid valve switches to the second position, and the lubricating oil flowing out of the lubrication pump flows into the oil tank to realize self-circulation. At the same time, the grease is stirred during the self-circulation process.

[0097] 4. Replacing the mounting gear on the ratchet bearing can adjust the speed of the lubrication pump.

[0098] 5. The power is provided by the downward potential energy of the excavator boom, and the torque provided to the lubrication pump shaft is large, and there will be no situation where the grease cannot be pumped due to the long pipeline.

[0099] 6. If the lubrication pump is directly connected to the distributor, continuous lubrication of the excavator can be achieved by adjusting the flow of the lubrication pump.

[0100] The present invention realizes the conversion of the potential energy of the excavator boom's descent into mechanical energy for driving the lubrication pump, thereby realizing energy recovery and utilization of the excavator, avoiding power waste and improving energy utilization. At the same time, the device has sufficient power, a large-capacity oil storage tank can be designed, and a variety of lubrication modes can be configured. The speed of the lubrication pump can be adjusted by replacing gears as needed. In addition, the device has a simple mechanical structure, low manufacturing cost, and is durable, which greatly meets the lubrication requirements of the excavator.

[0101] The excavator provided by the present invention is described below. The excavator described below and the energy-saving self-lubricating device of the excavator described above can be referred to each other.

[0102] An excavator provided by the present invention may include the excavator energy-saving self-lubricating device as described in any one of the above embodiments.

[0103] The beneficial effects achieved by the excavator provided by the present invention are consistent with the beneficial effects achieved by the energy-saving self-lubricating device for the excavator provided by the present invention, and will not be described in detail here.

[0104] It should be noted that the above-mentioned excavator can be a wheeled excavator, a crawler excavator or other types of excavators.

[0105] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0106] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0107] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. An energy-saving self-lubricating device for an excavator, characterized in that: include: A storage tank for containing grease; A lubrication pump, the oil inlet of which is connected to the oil storage tank; A solenoid valve, wherein a first oil port thereof is connected to an oil outlet of the lubrication pump, and a third oil port thereof is connected to the oil storage tank; A distributor, one end of which is connected to the second oil port of the solenoid valve, and the other end of which is connected to each lubrication point; An energy conversion device has one end connected to the boom and the other end connected to the turntable. The rotating shaft of the lubrication pump is connected to the energy conversion device. The energy conversion device converts the potential energy of the boom's descent into mechanical energy to drive the lubrication pump to inject grease into various lubrication points.

2. The energy-saving self-lubricating device for excavators according to claim 1, characterized in that: The energy conversion device comprises: A bracket, fixed on the turntable; The telescopic rod is composed of a sleeve and a pull rod, the front end of the pull rod is hinged to the ear plate on the boom, and the rear end of the sleeve is hinged to the bracket; A support block, fixed on the front end side of the sleeve; The power component has one end fixed on the front end of the pull rod and the other end supported on the support block, and the two are movably connected so that the power component can perform telescopic movement with the pull rod, thereby driving the lubrication pump to rotate.

3. The energy-saving self-lubricating device for excavators according to claim 2 is characterized in that: The power component is a rack, the lubrication pump is fixed on the sleeve, a gear is fixed on the rotating shaft of the lubrication pump, the gear is meshed with the rack, and the lubrication pump is driven to rotate by converting the telescopic movement of the rack into the rotational movement of the gear; the rotation speed of the lubrication pump is adjusted by changing the size of the gear, thereby achieving the adjustment of the flow rate of the lubrication pump.

4. The energy-saving self-lubricating device for excavators according to claim 3 is characterized in that: An elongated sliding groove is provided on the bottom surface of the rack, and an embedded roller is provided on the top surface of the support block. The roller extending from the top surface of the support block is inserted into the elongated sliding groove. The cooperation of the two enables the rack to slide on the support block.

5. The energy-saving self-lubricating device for excavators according to claim 3 is characterized in that: A one-way brake component is installed between the gear and the rotating shaft of the lubrication pump; when the boom is raised, the pull rod extends outward in the sleeve, and under the action of the one-way brake component, the rotating shaft of the lubrication pump does not rotate with the gear but remains stationary; when the boom is lowered, the pull rod contracts inward in the sleeve, and under the action of the one-way brake component, the rotating shaft of the lubrication pump rotates with the gear.

6. The energy-saving self-lubricating device for excavators according to claim 5, characterized in that: The one-way braking component is a ratchet bearing, the rotating shaft of the lubrication pump is fixed in the inner ring of the ratchet bearing, and the gear is fixed on the outer ring of the ratchet bearing; when the boom is raised, the pull rod is retracted to drive the rack to move, the ratchet bearing rotates forward, and the lubrication pump stops working; when the boom is lowered, the pull rod is extended to drive the rack to move, the ratchet bearing is in reverse lock, and the gear rotates to drive the lubrication pump to work.

7. The energy-saving self-lubricating device for excavators according to claim 1, characterized in that: The solenoid valve is a two-position three-way solenoid valve, and the action of its valve position is controlled by connecting a counter; When the first and second oil ports of the two-position three-way solenoid valve are connected and the boom is lowered, the lubrication pump is driven to inject grease into each lubrication point to achieve self-lubrication; When the first and third oil ports of the two-position three-way solenoid valve are connected and the boom is lowered, the lubrication pump is driven to work to flow the grease from the oil storage tank through the lubrication pump and the solenoid valve back to the oil storage tank, completing the self-circulation. A lubrication cycle is set in the timer, and the switching between the self-lubrication process and the self-circulation process is completed by controlling the power on and off of the solenoid valve.

8. An excavator, characterized in that: An energy-saving self-lubricating device for an excavator according to any one of claims 1 to 7 is installed.

9. A lubrication method for an energy-saving self-lubricating device for an excavator according to any one of claims 1 to 7, characterized in that: The lubrication method includes an intermittent lubrication method, which is divided into a self-lubrication method and a self-circulation method; The self-lubricating method The process includes: 1) The timer controls the solenoid valve to be energized so that the first and second oil ports are connected, and the boom is lowered. Under the action of the energy conversion device, the lubrication pump is driven to inject grease into each lubrication point to achieve self-lubrication; 2) The timer still controls the solenoid valve to be energized, the boom is lifted, and the lubrication pump is stopped at this time; The self-circulation method The process includes: 1) The timer controls the solenoid valve to cut off the power so that the first and third oil ports are connected, and the boom is lowered. Under the action of the energy conversion device, the lubrication pump is driven to work and the grease flows from the oil storage tank through the lubrication pump and the solenoid valve back to the oil storage tank, completing the self-circulation; 2) The timer still controls the solenoid valve to be in the power-off state, the boom is raised, and the lubrication pump is in the stopped working state; The lubrication cycle is set in the timer connected to the solenoid valve, and the switching between the self-lubrication process and the self-circulation process is completed by controlling the power on and off of the solenoid valve.

10. The lubrication method according to claim 9, characterized in that: The lubrication method also includes a continuous lubrication method, which The process includes: Cancel the access of the solenoid valve, directly connect the oil storage tank to the inlet of the lubrication pump, connect the outlet of the lubrication pump to the distributor, and adjust the flow of the lubrication pump to control the lubrication amount of the lubrication pump every time the boom is lowered, so as to achieve continuous lubrication of the excavator.

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