An energy-saving self-lubricating device and method for an excavator, and an excavator

Abstract

The application discloses an excavator energy-saving self-lubricating device and a lubricating method and an excavator, and 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; the oil inlet of the lubricating pump is communicated with the oil storage tank; the first oil port of the electromagnetic valve is communicated with the oil outlet of the lubricating pump, and the third oil port 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 is communicated with each lubricating point; one end of the energy conversion device is connected with a movable arm, and the other end is connected on a rotary table; the rotating shaft of the lubricating pump is connected with the energy conversion device; the energy conversion device converts the potential energy of the movable arm descending into mechanical energy for driving the lubricating pump, and lubricating grease is injected into each lubricating point, so that the waste of power is avoided, the energy utilization rate is improved, the mechanical structure of the device is simple, the manufacturing cost is low, the device is durable and reliable, and the lubricating requirements of the excavator are greatly met.

Description

TECHNICAL FIELD

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

[0002] The lubrication system is a very important component of the excavator, especially for the relatively moving positions of the working device and the rotating table of the excavator, for example, the working device of the excavator is the device directly working of the excavator, the hinge points thereof are relatively frequently rotated, bear larger force and load, and have poor working conditions, and the grease needs to be continuously added between the pin shaft and the bearing of the hinge points to reduce friction, reduce wear, etc., and greatly improve the service life.

[0003] For various centralized lubrication systems of the excavator, they are ultimately to use different devices to inject the grease into the specified position. At present, the manual lubrication and the automatic centralized lubrication are mainly used, the manual lubrication mainly uses the greasing tool to inject the grease into the lubrication point or the centralized block at the specified position by manual operation, this method is simple and has low cost, but the lubrication cycle interval of the working device of the excavator is short, and the grease needs to be added at regular intervals, which consumes the working hours and labor, and once the grease is forgotten, the wear of the pin shaft position will be aggravated; compared with the manual grease injection, the automatic centralized lubrication system uses the motor to drive the lubrication pump to inject the grease, the injection time and the injection amount are controlled by the program, which saves the working hours and labor, but the cost is high, the oil tank is small, and the motor is needed to drive the lubrication pump to work, which increases the cost of using the vehicle. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides an energy-saving self-lubricating device and method for excavator, which converts the potential energy of the lowering of the excavator arm into mechanical energy to drive the lubrication pump, and injects the grease into the lubrication point, thereby realizing self-lubrication.

[0005] The present application is implemented according to the following technical scheme:

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

[0007] An oil tank for containing the grease;

[0008] A lubrication pump, an oil inlet of which is in communication with the oil tank;

[0009] An electromagnetic valve, a first oil port of which is in communication with an oil outlet of the lubrication pump, and a third oil port of which is in communication with the oil tank;

[0010] A distributor, one end of which is in communication with a second oil port of the electromagnetic valve, and the other end of which is in communication with each lubrication point;

[0011] An energy conversion device is connected to the jib at one end and to the slewing ring at the other end, the shaft of the lubricating pump is connected to the energy conversion device, the energy conversion device converts the potential energy of the jib lowering into mechanical energy to drive the lubricating pump to inject lubricating grease into each lubricating point.

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

[0013] A bracket is fixed to the slewing ring;

[0014] A telescopic rod is composed of a sleeve and a pull rod, the front end of the pull rod is hinged to an ear plate on the jib, and the tail end of the sleeve is hinged to the bracket;

[0015] A support block is fixed to the front end side of the sleeve;

[0016] A power component is fixed at one end to the front end of the pull rod and supported at the other end on the support block, and the two are movably connected, so that the power component can follow the pull rod to make telescopic movement, thereby driving the lubricating pump to rotate.

[0017] In some embodiments, the power component is a rack, the lubricating pump is fixed to the sleeve, a gear is fixed to the shaft of the lubricating pump, the gear is engaged with the rack, and the telescopic movement of the rack is converted into the rotary movement of the gear to drive the lubricating pump to rotate; the size of the gear is changed to adjust the rotation speed of the lubricating pump, thereby adjusting the flow of the lubricating pump.

[0018] In some embodiments, the bottom surface of the rack is provided with an elongated sliding groove, and the top surface of the support block is provided with an embedded roller, the roller protruding from the top surface of the support block is inserted into the elongated sliding groove, and the two cooperate to enable the rack to slide on the support block.

[0019] In some embodiments, a one-way brake component is installed between the gear and the shaft of the lubricating pump; when the jib is lifted, the pull rod extends outward in the sleeve, at which time the shaft of the lubricating pump does not rotate with the gear under the action of the one-way brake component, but remains stationary; when the jib is lowered, the pull rod retracts inward in the sleeve, at which time the shaft of the lubricating pump rotates with the gear under the action of the one-way brake component.

[0020] In some embodiments, the one-way brake component is a ratchet bearing, the shaft of the lubricating pump is fixed in the inner ring of the ratchet bearing, and the gear is fixed to the outer ring of the ratchet bearing; when the jib is lifted, the pull rod is retracted to move the rack, the ratchet bearing rotates in the forward direction, and the lubricating pump stops working; when the jib is lowered, the pull rod is extended to move the rack, the ratchet bearing is locked in the reverse direction, and the gear rotates to drive the lubricating pump to work.

[0021] In some embodiments, the electromagnetic valve is a two-position three-way electromagnetic valve, and the valve position of the electromagnetic valve is controlled by connecting a counter; when the first and second oil ports of the two-position three-way electromagnetic valve are connected and the boom is lowered, the lubricating pump is driven to work to inject lubricating grease into each lubricating point, thereby realizing self-lubrication; when the first and third oil ports of the two-position three-way electromagnetic valve are connected and the boom is lowered, the lubricating pump is driven to work to flow the lubricating grease from the oil tank back to the oil tank through the lubricating pump and the electromagnetic valve, thereby completing self-circulation. The lubrication period is set in the timer, and the self-lubrication process and the self-circulation process are switched by controlling the power-on and power-off of the electromagnetic valve.

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

[0023] In a third aspect, the present application provides a lubricating method based on the excavator energy-saving self-lubricating device, and the lubricating method includes an intermittent lubricating method, which is divided into a self-lubricating method and a self-circulation method.

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

[0025] 1) The timer controls the power-on of the electromagnetic valve to connect the first and second oil ports, and the boom is lowered, and under the action of the energy conversion device, the lubricating pump is driven to work to inject lubricating grease into each lubricating point, thereby realizing self-lubrication.

[0026] 2) The timer still controls the electromagnetic valve to be in the power-on state, and the boom is lifted, and at this time the lubricating pump is in a stopped working state.

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

[0028] 1) The timer controls the power-off of the electromagnetic valve to connect the first and third oil ports, and the boom is lowered, and under the action of the energy conversion device, the lubricating pump is driven to work to flow the lubricating grease from the oil tank back to the oil tank through the lubricating pump and the electromagnetic valve, thereby completing self-circulation.

[0029] 2) The timer still controls the electromagnetic valve to be in the power-off state, and the boom is lifted, and at this time the lubricating pump is in a stopped working state.

[0030] The lubrication period is set in the timer in which the electromagnetic valve is connected, and the self-lubrication process and the self-circulation process are switched by controlling the power-on and power-off of the electromagnetic valve.

[0031] In some embodiments, the lubricating method further includes a continuous lubricating method, which includes the following processes:

[0032] The electromagnetic valve is removed, the oil tank is directly connected to the inlet of the lubricating pump, the outlet of the lubricating pump is connected to the distributor, and the lubricating amount of the lubricating pump during each boom lowering is controlled by adjusting the flow of the lubricating pump, thereby realizing continuous lubrication of the excavator.

[0033] The present application has the advantages that:

[0034] The present application realizes the conversion of the potential energy of the lowering of the movable arm into mechanical energy to drive the lubricating pump, realizes the energy recycling of the excavator, avoids the waste of power, improves the energy utilization rate, and at the same time, the device has abundant power, can be designed with a large-capacity oil tank, has various lubricating modes, can replace the gear to adjust the rotating speed of the lubricating pump according to the needs, and the mechanical structure of the device is simple, the manufacturing cost is low, and the device is durable, which greatly meets the lubricating requirements of the excavator. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which are part of the present application, serve to provide a further understanding of the present application, and the schematic embodiments of the present application and the descriptions thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained from these drawings by those of ordinary skill in the art without any creative effort.

[0036] In the drawings:

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

[0038] Figure 2 It is a schematic diagram of the semi-automatic centralized lubricating structure of the present application.

[0039] Reference signs: 21, centralized block; 22, oil nozzle; 23, joint; 24, lubricating hose; 25, joint at a lubricating point.

[0040] Figure 3 It is a schematic diagram of the full-automatic centralized lubricating structure of the present application.

[0041] Reference signs: 31, movable arm; 32, distributor; 33, filter; 34, lubricating pump; 35, rotating table; 36, lubricating point at the root of the movable arm.

[0042] Figure 4 It is a top view of the energy-saving self-lubricating device of the excavator of the present application.

[0043] Figure 5 It is Figure 4 the A-A sectional view in the

[0044] Reference signs: 41, energy conversion device; 42, lubricating pump; 43, oil tank; 44, distributor; 45, movable arm; 46, rotating table; 47, lubricating hose; 48, gear; 49, ratchet bearing; 410, electromagnetic valve.

[0045] Figure 6Schematic 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 is a schematic diagram of a telescopic rod of the present invention;

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

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

[0051] Figure identification: 531, long chute.

[0052] Figure 10 is a schematic diagram of a support block of the present invention;

[0053] Figure identification: 541, roller.

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

[0055] Figure 12 This is a schematic diagram of the excavator boom of the present invention being raised to the extreme position;

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

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

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

[0059] Figure 16 This is a self-circulating principle diagram of the energy-saving self-lubricating device for an excavator according to the present invention;

[0060] Figure 17 This is a schematic diagram of the continuous lubrication principle of the energy-saving self-lubricating device for excavators 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 rather 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 objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments with reference to the drawings in the embodiments of the present application. The following embodiments are used to explain the present application, but are not used to limit the scope of the present application.

[0063] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0064] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] At present, the lubrication mode of excavators mainly includes manual lubrication, semi-automatic and automatic centralized lubrication. For manual lubrication and semi-automatic centralized lubrication scheme: manual lubrication, as shown in Figure 1 , directly fills the oil nozzle at the hinge point position; semi-automatic centralized lubrication, as shown in Figure 2 , connects the lubrication points of each hinge point with a lubrication hose 24 (the lubrication hose 24 is connected with a lubrication point connector 25), and the lubrication hose 24 is uniformly connected to a centralized block 21 (the lubrication hose 24 is connected with a connector 23), and then the oil nozzle 22 is used to fill the lubricating grease into each lubrication pipe. As shown in Figure 3 , for automatic centralized lubrication, the form is mostly that one end of the lubrication hose is connected with a lubrication point 36 at the root of the movable arm, and the other end is connected with a distributor 32 (installed on the movable arm 31), a lubrication pump 34 (installed on a rotating table 35, the outlet of the lubrication pump 34 is connected with a filter 33, and the inlet of the lubrication pump 34 is connected with an oil tank) driven by a motor is used to input lubricating grease to the distributor 32, and then the lubricating grease is delivered to each lubrication point by the distributor 32.

[0066] However, the excavator lubrication cycle interval is short, and manual lubrication and semi-automatic centralized lubrication need to be filled with lubricating grease at each lubrication point after shutdown, which wastes time and manpower, and some customers are tired of repeated manual greasing, reducing the lubrication frequency and reducing the service life of the excavator. Full-automatic centralized lubrication needs to be driven by a motor, consumes energy, and has high production matching cost. In the case of long lubrication pipeline, it may not be able to pump oil. At the same time, the energy of the working device of the excavator cannot be reasonably recycled when it is lowered, which causes energy waste.

[0067] As shown in Figure 4 、 Figure 5 、 Figure 13 、 Figure 14 The present application provides an excavator energy-saving self-lubricating device to solve the above problems, which comprises an oil tank 43, a lubricating pump 42, an electromagnetic valve 410, a distributor 44 and an energy conversion device 41. The oil tank 43 is used to store lubricating grease. The oil inlet of the lubricating pump 42 is in communication with the oil tank 43. The first oil port of the electromagnetic valve 410 is in communication with the oil outlet of the lubricating pump 42, and the third oil port is in communication with the oil tank 43. One end of the distributor 44 is in communication with the second oil port of the electromagnetic valve 410, and the other end is in communication with 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 turret 46. The rotating shaft of the lubricating pump 42 is connected to the energy conversion device 41. The energy conversion device 41 converts the potential energy of the boom 45 when it is lowered into mechanical energy to drive the lubricating pump 42, and injects lubricating grease into each lubrication point.

[0068] The present application realizes the reasonable recycling of potential energy when the boom is lowered. The energy conversion device converts the potential energy of the boom into mechanical energy when it is lowered, drives the lubricating pump to work, and realizes self-lubrication and self-circulation by controlling the electromagnetic valve switching valve position with a timer. This greatly saves time and cost, avoids energy waste, and improves energy utilization.

[0069] It should be noted that the lubricating pump 42, the electromagnetic valve 410, the oil tank 43, the distributor 44 and the lubrication points are connected by lubricating hoses 47.

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

[0071] As shown in Figure 6 、 Figure 8As shown, the energy conversion device 41 comprises 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 hingedly connected with an ear plate on the movable arm 45 through a pin, and the tail end of the sleeve 511 is hingedly connected with an 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 mounting support block point 513 in the drawing); one end of the power component is fixed on the front end of the pull rod 512 through a bolt, and the other end is supported on the support block 54, and the two are movably connected, so that the power component can make telescopic movement with the pull rod 512, thereby driving the lubricating pump 42 to rotate.

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

[0073] Further solutions, as shown in Figure 5 , Figure 6 , the power component is a rack 53, which is fixed on the front end of the pull rod 512 through a bolt (i.e. the mounting rack point 515 in the drawing), and the lubricating pump 42 is fixed on the sleeve 511 (i.e. the mounting lubricating pump point 514 in the drawing), the shaft of the lubricating pump 42 is fixed with a gear 48, the gear 48 is engaged with the rack 53, and the telescopic movement of the rack 53 is converted into the rotary movement of the gear 48 to drive the lubricating pump 42 to rotate; the size of the gear 48 is changed to adjust the rotation speed of the lubricating pump 42, thereby adjusting the flow of the lubricating pump 42.

[0074] Further solutions, as shown in Figure 9 , Figure 10 , the bottom surface of the rack 53 is provided with an elongated sliding groove 531, and the top surface of the support block 54 is provided with an embedded roller 541, the roller 541 extending from the top surface of the support block 54 is inserted into the elongated sliding groove 531, and the two cooperate to enable the rack 53 to slide on the support block 54.

[0075] Further solutions, as shown in Figure 5 , Figure 6 , a one-way brake component is installed between the gear 48 and the shaft of the lubricating pump 42; when the movable arm 45 is lifted, the pull rod 512 extends outwards in the sleeve 511, at this time under the action of the one-way brake component, the shaft of the lubricating pump 42 does not rotate with the gear 48, but remains in a stationary state; when the movable arm 45 is lowered, the pull rod 512 retracts inwards in the sleeve 511, at this time under the action of the one-way brake component, the shaft of the lubricating pump 42 rotates with the gear 48.

[0076] Preferred solutions, as shown in Figure 7As shown, the one-way brake component is a ratchet bearing 49, the rotating shaft of the lubricating 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; when 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 lubricating pump 42 stops working; when the boom 45 is lowered, the pull rod 512 is extended to drive the rack 53 to move, the ratchet bearing 49 is reversely locked, and the gear 48 rotates to drive the lubricating pump 42 to work.

[0077] It should be noted that, as Figure 11 、 Figure 12 shown, the ratchet bearing 49 is installed on the rotating shaft of the lubricating pump 42, the gear 48 is installed on the outer ring of the ratchet bearing 49, and 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 reversely locked to drive the lubricating pump 42 to work; when the boom 45 is lifted, the ratchet bearing 49 rotates forward, the rotating shaft of the lubricating pump 42 is stationary, the lubricating pump 42 does not work, and the power of the excavator is not consumed; the self-lubricating device is installed between the boom 45 and the rotating platform 46, and the space is reasonably utilized without interference. There are various lubrication schemes to choose from, when the electromagnetic valve 410 is connected, timed lubrication can be achieved; when the electromagnetic valve 410 is not connected in the lubricating pipeline, the oil outlet of the lubricating pump 42 is directly connected to the distributor 44 to adjust the flow of the lubricating pump 42, and continuous lubrication is achieved.

[0078] Further solutions, as Figure 15 、 Figure 16 shown, the electromagnetic valve 410 is a two-position three-way electromagnetic valve, and the valve position is controlled by connecting the counter; when the first and second oil ports of the two-position three-way electromagnetic valve are connected and the boom 45 is lowered, the lubricating pump 42 is driven to work to inject lubricating grease into each lubrication point to achieve self-lubrication; when the first and third oil ports of the two-position three-way electromagnetic valve are connected and the boom 45 is lowered, the lubricating pump 42 is driven to work to flow the lubricating grease from the oil tank 43 back to the oil tank 43 through the lubricating pump 42 and the electromagnetic valve 410, completing the self-circulation. Set the lubrication period in the timer, and switch the self-lubrication process and the self-circulation process by controlling the power-on and power-off of the electromagnetic valve.

[0079] As Figure 11 、 Figure 12 、 Figure 15 、 Figure 16 、 Figure 17As shown, the present application also provides a lubrication method based on the above-mentioned excavator energy-saving self-lubricating device. The general process is as follows: when lubrication is started, the potential energy of the lowering of the excavator's movable arm is converted into mechanical energy by the energy conversion device, driving the lubricating pump to work, and then through the two-position three-way electromagnetic valve, the lubricating pump is connected to the distributor of the excavator to each lubricating pipeline, realizing lubrication; when the movable arm is lifted, the lubricating pump shaft is installed with a ratchet bearing that rotates in the positive direction, so the pump remains stationary, and therefore the process of lifting the movable arm does not consume the power of the excavator. When lubrication is stopped, the oil outlet of the lubricating pump is connected to the oil tank by the two-position three-way electromagnetic valve to enter self-circulation, achieving the function of stirring the lubricating grease; the electromagnetic valve is connected to the timer to control the lubrication period, and the size of the gear can be adjusted to realize pump flow regulation. The lubricating pump can also be directly connected to the distributor to adjust the lubrication amount, realizing the continuous lubrication of the excavator.

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

[0081] The lubrication method includes intermittent lubrication method and continuous lubrication method;

[0082] Intermittent lubrication scheme:

[0083] Self-lubrication process:

[0084] (1) The timer controls the electromagnetic valve to be powered on at the No. 1 valve position as shown in Figure 15 , the movable arm is lowered, the telescopic rod of the energy conversion device stretches the rack to follow the movement of the pull rod, the ratchet bearing is in reverse locking, the gear rotates to drive the lubricating pump to work, the lubricating grease flows from the oil tank through the lubricating pump and the electromagnetic valve to the distributor, and then to each lubricating point.

[0085] (2) The timer still controls the electromagnetic valve to be powered on at the No. 1 valve position, the movable arm is lifted, the telescopic rod is shortened, the rack follows the rear movement of the pull rod, the ratchet bearing rotates in the positive direction, the lubricating pump shaft is stationary, and the lubricating pump stops working.

[0086] Self-circulation process:

[0087] (1) The timer controls the electromagnetic valve to be powered off at the No. 2 valve position as shown in Figure 16 , the movable arm is lowered, the telescopic rod of the energy conversion device stretches the rack to follow the movement of the pull rod, the ratchet bearing is in reverse locking, the gear rotates to drive the lubricating pump to work, the lubricating grease flows from the oil tank through the lubricating pump and the electromagnetic valve to the oil tank, and then completes self-circulation.

[0088] (2) The timer still controls the electromagnetic valve to be powered off, the electromagnetic valve is at the No. 2 valve position, the movable arm is lifted, the telescopic rod is shortened, the rack follows the rear movement of the pull rod, the ratchet bearing rotates in the positive direction, the lubricating pump shaft is stationary,

[0089] The lubricating pump stops working.

[0090] In the timer with the access of the electromagnetic valve, a lubricating period is set, and the switching between the self-lubricating process and the self-circulating process is completed by controlling the power-on and power-off of the electromagnetic valve.

[0091] The continuous lubricating scheme:

[0092] The access of the electromagnetic valve is cancelled, the oil tank is directly connected to the inlet of the lubricating pump, the outlet of the lubricating pump is connected to the distributor, and the lubricating amount of the pump during each boom lowering is controlled by adjusting the flow of the lubricating pump, so that the continuous lubrication of the excavator is realized. Figure 17

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

[0094] 1. The potential energy of the boom lowering of the excavator is converted into mechanical energy for driving the lubricating pump to work, and the lubricating grease is pumped to each lubricating point of the working device of the excavator, and this process realizes the energy recycling of the excavator.

[0095] 2. The shaft of the lubricating pump is installed with a ratchet bearing, when the boom is lifted, the rack engages with the gear on the ratchet bearing to make the bearing rotate forward, and the lubricating pump remains stationary, without consuming power when the boom is lifted; when the boom is lowered, the ratchet bearing reverses, and the gear drives the shaft of the lubricating pump to rotate and pump oil.

[0096] 3. A two-position three-way electromagnetic valve is connected in the lubricating pipeline, when the lubricating work is performed, the lubricating grease in the oil tank flows into the electromagnetic valve and then to the distributor to complete the lubricating work; when the lubricating work is stopped, the electromagnetic valve is switched to the second position, and the lubricating oil flowing out of the lubricating pump flows into the oil tank to realize self-circulation, and during the self-circulation process, the lubricating grease is stirred.

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

[0098] 5. The power is converted from the potential energy of the boom lowering of the excavator, and the torque provided to the shaft of the lubricating pump is large, so that the situation that the lubricating grease cannot be moved due to the long pipeline does not occur.

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

[0100] The present application realizes the conversion of the potential energy of the boom lowering of the excavator into mechanical energy for driving the lubricating pump to work, realizes the energy recycling of the excavator, avoids the waste of power, improves the energy utilization rate, and at the same time, the device has abundant power, can be designed with a large-capacity oil tank, has various lubricating modes, can replace the gear to adjust the speed of the lubricating pump according to needs, and the mechanical structure of the device is simple, the manufacturing cost is low, and the device is durable and robust, which greatly meets the lubricating 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 for the excavator described above can be referred to in correspondence with 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, numerous specific details are described. However, it is understood that embodiments of the present invention may 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] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are also intended to fall within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art will be able to use them in combination based on the known technical solutions and the technical problems to be solved by this application.

[0107] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An energy saving self-lubricating device for excavators, characterized by, It comprises: a grease tank for containing lubricating grease; a lubricating pump, the inlet of which is connected with the grease tank; a solenoid valve, the first oil port of which is connected with the outlet of the lubricating pump, and the third oil port of which is connected with the grease tank; a distributor, one end of which is connected with the second oil port of the solenoid valve, and the other end of which is connected with each lubricating point; an energy conversion device, one end of which is connected with the boom, and the other end of which is connected with the rotary table, the rotating shaft of the lubricating pump is connected with the energy conversion device, the energy conversion device converts the potential energy of the boom lowering into mechanical energy to drive the lubricating pump, and injects lubricating grease into each lubricating point; the energy conversion device comprises: a support fixed on the rotary table; a telescopic rod composed of a sleeve and a pull rod, the front end of the pull rod is hinged with an ear plate on the boom, and the tail end of the sleeve is hinged with the support; a supporting block fixed on the front end side of the sleeve; a power component, one end of which is fixed on the front end of the pull rod, and the other end of which is supported on the supporting block, and the two are movably connected, so that the power component can follow the pull rod to make telescopic movement, and in turn drive the lubricating pump to rotate; the power component is a rack, the lubricating pump is fixed on the sleeve, a gear is fixed on the rotating shaft of the lubricating pump, the gear is engaged with the rack, the telescopic movement of the rack is converted into the rotary movement of the gear to drive the lubricating pump to rotate, the size of the gear is changed to adjust the rotating speed of the lubricating pump, and in turn to adjust the flow of the lubricating pump.

2. The energy-saving self-lubricating device of the excavator according to claim 1, wherein: an elongated slide groove is arranged on the bottom surface of the rack, and a built-in roller is arranged on the top surface of the supporting block, the roller protruding from the top surface of the supporting block is inserted into the elongated slide groove, and the two cooperate to enable the rack to slide on the supporting block.

3. The energy-saving self-lubricating device of the excavator according to claim 1, wherein: a one-way brake component is arranged between the gear and the rotating shaft of the lubricating pump; when the boom is lifted, the pull rod is extended outwards in the sleeve, at this time, under the action of the one-way brake component, the rotating shaft of the lubricating pump does not rotate with the gear, but remains stationary; when the boom is lowered, the pull rod is retracted inwards in the sleeve, at this time, under the action of the one-way brake component, the rotating shaft of the lubricating pump rotates with the gear.

4. The energy-saving self-lubricating device of the excavator according to claim 3, wherein: the one-way brake component is a ratchet bearing, the rotating shaft of the lubricating 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 lifted, the pull rod is retracted to drive the rack to move, the ratchet bearing rotates forward, and the lubricating pump stops working; when the boom is lowered, the pull rod is extended to drive the rack to move, the ratchet bearing is locked in reverse, and the gear rotates to drive the lubricating pump to work.

5. The energy-saving self-lubricating device of the excavator according to claim 1, wherein: the solenoid valve is a two-position three-way solenoid valve, and the valve position of the solenoid valve is controlled by connecting a timer; when the first and second oil ports of the two-position three-way solenoid valve are connected and the boom is lowered, the lubricating pump is driven to work to inject lubricating grease into each lubricating point, and self-lubrication is realized. When the first and third oil ports of the two-position three-way electromagnetic valve are connected and the boom is lowered, the lubricating pump is driven to work to circulate the lubricating grease from the oil tank through the lubricating pump and the electromagnetic valve back to the oil tank, completing the self-circulation; The lubrication period 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 power-off of the electromagnetic valve.

6. A power-saving self-lubricating device for excavators, characterized in that: The device is installed on an excavator.

7. A lubrication method based on the energy-saving self-lubricating device of any one of claims 1 to 5, 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-lubrication method includes the following processes: 1) The timer controls the electromagnetic valve to be powered on to connect the first and second oil ports, and the boom is lowered. Under the action of the energy conversion device, the lubricating pump is driven to work to inject lubricating grease into each lubrication point, realizing self-lubrication. 2) The timer still controls the electromagnetic valve to be powered on, and the boom is raised. At this time, the lubricating pump is in a stopped working state. The self-circulation method includes the following processes: 1) The timer controls the electromagnetic valve to be powered off to connect the first and third oil ports, and the boom is lowered. Under the action of the energy conversion device, the lubricating pump is driven to work to circulate the lubricating grease from the oil tank through the lubricating pump and the electromagnetic valve back to the oil tank, completing the self-circulation. 2) The timer still controls the electromagnetic valve to be powered off, and the boom is raised. At this time, the lubricating pump is in a stopped working state. The lubrication period 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 power-off of the electromagnetic valve.

8. The lubricating method according to claim 7, characterized by The lubrication method also includes a continuous lubrication method, which includes the following processes: The electromagnetic valve is removed, the oil tank is directly connected to the inlet of the lubricating pump, the outlet of the lubricating pump is connected to the distributor, and the lubricating amount of the lubricating pump during each boom lowering is controlled by adjusting the flow of the lubricating pump, that is, the continuous lubrication of the excavator is realized.

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