Lubrication pump and two-wire centralized lubrication system

Abstract

The present application relates to a kind of lubricating pump and double line centralized lubricating system.It includes bucket cover, driving device, pumping mechanism, reversing valve mechanism and guide slide sleeve, the outer periphery of bucket cover has the connecting structure that can be detachably connected with lubricating grease bucket, by replacing lubricating grease bucket by detaching, connecting structure, the upper end of guide slide sleeve is connected with bucket cover, for as the guide piece of pumping mechanism relative to the movement of bucket cover, to limit its along the central axis direction of lubricating grease bucket movement.Reversing valve mechanism includes reversing valve and reversing module, pumping mechanism includes pump seat and the plunger pair assembly that is arranged on pump seat and is driven by driving device, annular sealing element for being used for the sliding sealing cooperation with the inner wall of lubricating grease bucket is further provided on pump seat, driving device is fixed relative to pump seat, has when the oil of centralized lubricating system grease is finished and needs to be replenished Operation is convenient and quick, and it is not easy to enter sundries, for the large-scale engineering machinery of the oil demand, can reduce the advantages such as artificial grease frequency.

Description

TECHNICAL FIELD

[0001] The present application relates to a lubricating pump and a double-line centralized lubrication system. BACKGROUND

[0002] Engineering machinery is an important part of the equipment industry, mainly used in national defense construction projects, transportation construction, energy industry construction and production, raw material industry construction and production, agricultural and water conservancy construction, industrial and civil construction, urban construction, environmental protection and other fields. Its working conditions are complex, and the working objects are variable, often working under variable load, and the reliability and adaptability of the machine are required. In order to ensure that the bearing, articulated shaft and other friction pairs can run well under high-intensity operation for a long time, the shaft pin and shaft sleeve must be effectively lubricated.

[0003] For this, the traditional way generally includes two ways, one way is to use a grease gun manually, and add lubricating grease to the lubrication point through the grease nozzle on the friction pair. However, this method needs to stop operation, and because there are many lubrication points, one gun cannot complete the demand of all lubrication points, and it needs to be repeatedly filled into the oil gun, which is complicated and easy to contaminate, delays the construction process, and has high labor intensity. Because of the different qualities of personnel, shaft pin or shaft sleeve wear caused by untimely lubrication often occurs.

[0004] Another way is to install a centralized lubrication system on the engineering machinery. The centralized lubrication system refers to a system that connects the oil distributor to the lubrication pump through the pipeline to accurately supply oil to multiple lubrication points according to certain rules (period, oil quantity). The centralized lubrication system generally includes a lubrication pump, a distributor, and a lubrication pipeline, etc. The lubrication pump includes an integrated motor, a plunger pair, an oil tank, and a monitor, etc. Through the monitor, the lubricating grease can be added to each lubrication point according to the set time, which is also the advantage of the centralized lubrication system over the traditional lubrication method. However, this system also has disadvantages. The existing lubrication pump oil tank has limited capacity, generally not more than 8L, and for large engineering machinery, one tank of oil can be used for about a week. The oil package on the market is mostly a 15Kg (18L) plastic barrel, and the lubricating grease does not have fluidity, which requires the operator to use special equipment to transfer the oil from the packaging barrel to the oil pump oil tank. The transfer process is time-consuming, the oil is easy to contaminate, and the labor is large, which often causes system blockage and prolongs the downtime of the excavator.

[0005] Based on this, the users of engineering machinery and agricultural machinery and other field construction machinery urgently need a new technology that can be operated conveniently and quickly when the centralized lubrication system needs to be replenished, and is not easy to enter impurities, and can reduce the frequency of manual oil replenishment for large machinery that needs a large amount of oil. SUMMARY

[0006] The present application aims to provide a lubricating pump which is convenient and quick to operate when the grease in the centralized lubrication system needs to be replenished, is not easy to be contaminated, and can reduce the frequency of manual grease replenishment for large engineering machinery with a large oil demand; and a double-line centralized lubrication system using the lubricating pump.

[0007] The technical scheme of the lubricating pump of the present application is as follows:

[0008] The lubricating pump comprises:

[0009] A bucket cover is detachably connected to the grease bucket, and the grease bucket can be replaced by detaching and attaching the bucket cover.

[0010] A driving device;

[0011] A pumping mechanism comprising a pump base and a plunger pair assembly arranged on the pump base and driven by the driving device, the plunger pair assembly having a grease outlet for discharging the grease and a grease inlet for sucking the grease in the grease bucket, and the pump base is further provided with an annular sealing member for slidingly and sealingly cooperating with the inner wall of the grease bucket, and the driving device is fixed relative to the pump base.

[0012] A reversing valve mechanism comprising a reversing valve and a reversing module, the reversing valve comprising at least four oil ports, including a grease inlet port communicating with the grease outlet of the plunger pair assembly, a grease return port for communicating with the grease bucket, and first and second external grease ports; the reversing valve is controlled by the reversing module so that when the first external grease port discharges grease and the second external grease port returns grease, the first external grease port communicates with the grease inlet port through the reversing valve, and the second external grease port communicates with the grease return port through the reversing valve; when the first external grease port returns grease and the second external grease port discharges grease, the first external grease port communicates with the grease return port through the reversing valve, and the second external grease port communicates with the grease inlet port through the reversing valve.

[0013] A guide sliding sleeve is connected to the bucket cover at the upper end and serves as a guide for the movement of the pumping mechanism relative to the bucket cover to limit its movement along the central axis of the grease bucket, and the guide sliding sleeve comprises one sliding sleeve segment or at least two sliding sleeve segments which are telescopically and slidably connected along the central axis of the grease bucket.

[0014] The beneficial effects of the scheme are that as a double-line lubricating pump used in a centralized lubricating system, the lubricating pump is installed on the equipment to be lubricated, such as an excavator, together with a distributor, a pipeline bundle and the like during use, but the lubricating pump is different from the traditional lubricating pump in that the lubricating pump does not have an oil tank, but uses a grease bucket filled with lubricating grease on the market as an external oil tank, that is, the lubricating pump of the present application cooperates with the grease bucket to pump out the lubricating grease in the grease bucket and pump it to the subsequent distributor and lubricating pipeline. The setting of the bucket cover structure makes the connection of the lubricating pump and the grease bucket very convenient and fast, and compared with the traditional method of pumping lubricating grease into the fixed oil tank of the lubricating pump on site by using a grease supplementing device, the grease supplementing efficiency is greatly improved, and since the grease bucket is sealed, direct replacement will not cause impurities to enter, ensuring that the grease quality is not affected, thereby ensuring the safety of the plunger pair and the like in the lubricating pump and reducing the failure rate. Since the volume of the oil tank of the traditional lubricating pump is limited and cannot accommodate more lubricating grease, the frequency of lubricating grease supplementing is high, but the lubricating pump of the present application directly uses the lubricating grease in the grease bucket for pumping, and the capacity of the lubricating grease in the grease bucket is large and can be used for a longer time, so the frequency of lubricating grease supplementing can be reduced. The setting of the reversing valve mechanism makes the lubricating pump have two oil paths, constituting a double-line lubricating pump, and the two oil paths can alternately supply grease, which is not easy to block and stop compared with the traditional progressive lubricating pump, and the pumping efficiency, pumping distance and the like are improved compared with the traditional single-line lubricating pump. The setting of the guide sliding sleeve makes the pump seat and the reduction motor and the like descend axially without deviation, so that the grease inlet port is always in contact with the liquid level of the lubricating grease in the grease bucket, ensuring that it will not be pumped out. The setting of the guide sliding sleeve makes the pumping mechanism of the lubricating pump sink along with the decrease of the liquid level of the lubricating grease in the oil bucket when the lubricating pump is used with the grease bucket.

[0015] Further, at least one of the pipelines between the first external grease inlet, the second external grease inlet, the grease outlet and the grease inlet is connected with a pump seat quick connector or a three-way switch valve.

[0016] The beneficial effects of the scheme are that the setting of the pump seat quick connector and the three-way switch valve makes the lubricating pump not only serve as a power source for a centralized lubricating system, but also be connected with other external accessories to realize more functions, for example, be connected with a grease reel, so as to supply grease to a lubricating point as an emergency measure when the pipeline or the distributor of the centralized lubricating system fails, and play the role of an electric grease gun.

[0017] Further, the lubricating pump further comprises a compression spring arranged on the bucket cover or the guide sliding sleeve to provide an elastic extrusion force downward to the pumping mechanism.

[0018] The beneficial effects of the scheme are that the setting of the compression spring increases a downward force on the premise of sinking under gravity, thereby ensuring that the pumping mechanism is more closely attached to the lubricating grease in the lubricating grease barrel, thereby avoiding the phenomenon of pumping, and making the lubricating pump work more stably.

[0019] Further, the driving device is a reduction motor, the reversing module is a mechanical reversing mechanism driven by an output rotating shaft of the reduction motor, the mechanical reversing mechanism comprises a lever mechanism and a poking member, the reversing valve comprises a valve core, switching actions of the valve core between valve positions are driven by swinging actions of the lever mechanism, the poking member is installed on the output rotating shaft of the reduction motor to rotate with the output rotating shaft, when the output rotating shaft of the reduction motor rotates forward, the poking member positively pokes the lever mechanism to make the lever mechanism swing forward, thereby making the reversing valve be in one valve position; when the output rotating shaft of the reduction motor rotates reversely, the poking member reversely pokes the lever mechanism to make the lever mechanism swing reversely, thereby making the reversing valve be in another valve position, at least one of the lever mechanism and the poking member is an elastic structure, when the output rotating shaft rotates forward or reversely, the poking member contacts the lever mechanism and drives the valve core to act, when the valve core switches to the corresponding valve position, the poking member and the lever mechanism relatively slide through by elastic deformation of the elastic structure.

[0020] The beneficial effects of the scheme are that the mechanical reversing mechanism is directly driven by the output shaft of the reduction motor, without needing to additionally set a power source, and the reversing action of the mechanical reversing mechanism is stable and reliable.

[0021] Further, the driving device is a reduction motor, the reversing module is a mechanical reversing mechanism driven by an output rotating shaft of the reduction motor, the mechanical reversing mechanism comprises a lever mechanism and a poking member, the reversing valve comprises a valve core, switching actions of the valve core between valve positions are driven by swinging actions of the lever mechanism, the poking member is installed on the output rotating shaft of the reduction motor to rotate with the output rotating shaft, when the output rotating shaft of the reduction motor rotates forward, the poking member positively pokes the lever mechanism to make the lever mechanism swing forward, thereby making the reversing valve be in one valve position; when the output rotating shaft of the reduction motor rotates reversely, the poking member reversely pokes the lever mechanism to make the lever mechanism swing reversely, thereby making the reversing valve be in another valve position, elastic structures are arranged on both sides of the lever mechanism in the pump seat, when the output rotating shaft rotates forward or reversely, the poking member contacts the lever mechanism and drives the valve core to act, the elastic structures are compressed, when the valve core switches to the corresponding valve position, the poking member and the lever mechanism relatively slide through, and the elastic structures provide elastic forces to the lever mechanism to reset.

[0022] Further, the driving device is a speed reduction motor, the reversing valve comprises a valve core, the reversing module is a mechanical reversing mechanism driven by an output rotating shaft of the speed reduction motor, the mechanical reversing mechanism comprises a driving wheel and a driven wheel driven by the driving wheel, further comprises a circular arc guide structure for guiding the driven wheel, so that the driven wheel can revolve around the rotating axis of the driving wheel while the driving wheel drives the driven wheel to rotate, further comprises a driven wheel valve core transmission structure, so that the driven wheel drives the valve core to move linearly when revolving around the rotating axis of the driving wheel, the reversing of the reversing valve is realized by controlling the speed reduction motor to change the rotating direction of the driving wheel, and further comprises a position stopping structure for stopping the driven wheel after the driven wheel moves to the position along the circular arc guide structure.

[0023] Further, the reversing valve comprises a valve core, the reversing module comprises an electromagnet, the switching movement of the valve core between the valve positions is driven by the electromagnet, and the electromagnet is powered on and powered off to change the valve position of the reversing valve.

[0024] The scheme has the beneficial effects that the electromagnetic reversing has the characteristics of simple structure and low cost.

[0025] Further, the reversing module comprises an overflow valve installed on the reversing valve, and the reversing module controls the reversing valve through the overflow valve.

[0026] The scheme has the beneficial effects that the setting of the overflow valve constitutes a hydraulic reversing structure, and the structure is also relatively simple.

[0027] Further, the lubricating pump further comprises a controller for controlling the driving device to start, stop and speed-regulate according to a set control logic, and the controller has a man-machine interaction module to facilitate the adjustment of parameters of the lubricating pump according to different working conditions.

[0028] Further, an oil pressure switch, an overflow valve, a safety valve or an oil pressure sensor is arranged on an oil path between the fat outlet and the fat inlet or on a main oil path.

[0029] The scheme has the beneficial effects that any one of the pressure switch, the oil pressure sensor, the safety valve and the overflow valve has the function of protecting the main oil path, preventing fatal failures such as damage to the oil pipe or the lubricating pump caused by excessive pressure in the main oil path, and controlling the oil pressure of the main oil path to be less than the maximum safe pressure; the pressure switch can feed back to the controller to control the lubricating pump to stop when the pressure is too high, and the safety valve and the overflow valve can overflow when the pressure is too high to prevent the oil pressure from continuing to increase.

[0030] Further, the grease outlet is arranged on the upper part of the pump base, and the pumping mechanism has upper and lower limit positions when moving in the up-down direction, the bucket cover has an annular cavity with an open lower end or the bucket cover and the guide sleeve enclose an annular cavity with an open lower end, an oil pipe joint is arranged on the bucket cover, one end of the oil pipe joint is located in the annular cavity and the other end is located outside the bucket cover, an elastic adapter hose is arranged in the annular cavity, the upper end of the elastic adapter hose is connected with the oil pipe joint and the lower end is connected with the grease outlet, when the pumping mechanism is located at the lower limit position, the elastic adapter hose is in the minimum bending state, when the pumping mechanism is located at the upper limit position, the elastic adapter hose is in the maximum bending state, and the elastic adapter hose extends along the circumference of the annular cavity to a distance less than one circumference of the annular cavity and then reversely folds back.

[0031] The beneficial effects of the present scheme are: since the elastic adapter hose is arranged in the annular cavity of the bucket cover or in the annular cavity of the bucket cover and the guide sleeve, and the upper end of the elastic adapter hose is connected to the fixed bucket cover through the oil pipe joint and the lower end is connected to the movable pump base, when the pump base moves upward relative to the bucket cover, the elastic adapter hose is bent or folded in a U-shaped state in the annular cavity, and when the pump base moves downward relative to the bucket cover, the elastic adapter hose is gradually pulled apart in the annular cavity, that is, during the entire operation of the pump base, only the elastic adapter hose is in the folded or stretched state, and the external oil pipe connected to the outer end of the oil pipe joint is not subjected to any pulling force or traction, and whether the external oil pipe is bent or restricted does not hinder the up-down movement of the pump base, ensuring that the pump base can operate normally and ensuring good oil output; furthermore, the elastic adapter hose and the external oil pipe are connected through the oil pipe joint fixed on the bucket cover, and the sealing between the outer peripheral surface of the fixed oil pipe joint and the hole wall of the corresponding installation hole on the bucket cover is easy to achieve, and the sealing will not fail over time, which ensures that dust or mud outside the bucket cover cannot enter the bucket cover through the hole for installing the oil pipe, ensuring good waterproof and dustproof performance.

[0032] Further, the upper part of the driving device is fixed with a handle, and the central part of the bucket cover is provided with a lifting hole corresponding to the handle for lifting the handle through the lifting hole, and a detachable sealing cover is provided with a protective cover.

[0033] Further, the driving device is a speed reducer, and an adapter wire is wound in the space between the guide sleeve and the protective cover above the speed reducer, the lower end of the adapter wire is connected with the speed reducer and the upper end is fixed relative to the bucket cover, when the pumping mechanism is located at the lower limit position, the adapter wire is in the maximum unfolded state, and when the pumping mechanism is located at the upper limit position, the adapter wire is in the coiled state.

[0034] The beneficial effects of this solution are as follows: Since the geared motor requires a connecting wire, and the wire moves across the lid, it is still impossible to avoid the problem of reduced waterproofing of the lid and the pump base being unable to descend due to external restrictions on the wire. Therefore, by coiling the adapter wire in the space between the guide sleeve above the geared motor and the protective cover, one end of the adapter wire is connected to the movable geared motor, and the other end is connected to the electrical connector on the fixed lid. When the geared motor moves up and down, the adapter wire is coiled and stretched, and is not restricted by the wire during the up and down movement. Moreover, since the connection between the adapter wire and the lid is fixed, there is no need to reserve a hole for the power supply wire to move, so it is easy to achieve a seal at this point.

[0035] Furthermore, the handle includes a fixed part fixed relative to the reduction motor and a movable part slidably mounted on the fixed part in the vertical direction. The fixed part is provided with a stop structure that cooperates with the movable part to limit the upward movement of the movable part. When the handle is lifted, the movable part is first moved upward to cooperate with the stop structure, and then the fixed part is moved upward. The pump seat and / or the annular seal is provided with a vertically penetrating air hole, and a valve is sealed on the air hole. A pull rope is connected to the valve, and the upper end of the pull rope is fixed on the movable part. The pull rope is in a taut state. When the handle is pulled up, the movable part can open the valve through the pull rope.

[0036] The beneficial effects of this solution are as follows: When it is necessary to remove the lubricating pump from the grease tank, the space between the lower surface of the pump seat and the bottom of the tank or the liquid surface inside the tank is under negative pressure after being sucked up. It is quite difficult to lift the pump seat directly. Therefore, it is necessary to break the negative pressure state, that is, to allow air to enter the space. However, in actual operation, workers often forget to vent the air and instead pull the handle directly. This solution improves the ease of operation by setting a movable part on the handle. When the handle is lifted, the movable part moves first to open the air valve, and then drives the fixed part to move to lift the pump seat after venting the air.

[0037] Furthermore, the handle includes a fixed part fixed relative to the geared motor and a movable part slidably mounted on the fixed part in the vertical direction. The fixed part is provided with a stop structure that cooperates with the movable part to limit the upward movement of the movable part. When the handle is lifted, the movable part is first moved upward to cooperate with the stop structure, and then the fixed part is moved upward. A sealing assembly is provided on the outer edge of the pump base for sliding and sealing with the inner wall of the grease tank. The sealing assembly includes:

[0038] A rigid ring is used to be sleeved on the outer periphery of the pump base so as to guide and slide with the outer periphery of the pump base along the central axis. The rigid ring is provided with a stop structure to limit the upward stroke of the pump base. The rigid ring can be moved by the stop structure when the pump base is lifted.

[0039] A flexible ring plate, the inner side close to the central axis is connected with the rigid ring, and the outer edge is used for sliding sealing cooperation with the inner barrel wall of the lubricating grease barrel;

[0040] A flexible sealing ring is connected on the rigid ring and / or the flexible ring plate, and is located on the inner side of the rigid ring and / or the flexible ring plate, so as to seal the annular gap between the flexible ring plate and the outer surface of the pump base when the pump base is pressed down, and the annular gap is used for air conduction on the upper and lower sides of the flexible ring plate;

[0041] The rigid ring has a sealing position for sealing the annular gap between the flexible ring plate and the pump base and a disengaging position for disengaging the annular gap between the flexible ring plate and the pump base during the up and down movement of the rigid ring relative to the pump base; when the rigid ring moves from the disengaging position to the sealing position, the flexible sealing ring is pressed on the pump base to seal the annular gap; when the rigid ring moves from the sealing position to the disengaging position, the flexible sealing ring is disengaged from the pump base to allow air to pass through the annular gap;

[0042] The movable part is connected with a pull rope, the other end of the pull rope is connected with the rigid ring, the pump base is provided with an outwardly convex winding column, the connection point of the pull rope and the rigid ring is located above the winding column, the pull rope is wound on the winding column, and the pull rope is in a taut state; when the upper pulling handle is pulled, the movable part can drive the rigid ring to move downward relative to the pump base to allow air to pass through the annular gap.

[0043] The beneficial effects of the scheme are as follows: the movable part is arranged on the handle, when the handle is pulled up, the movable part moves first to move the rigid ring relative to the pump base to open the annular gap between the two to realize air intake, and then drives the fixed part to move to pull out the pump base after air exhaust, so that the operation convenience is greatly improved.

[0044] The technical scheme of the double-line centralized lubrication system is as follows:

[0045] The double-line centralized lubrication system comprises a lubricating pump, a distributor and a pipeline, and the lubricating pump comprises:

[0046] A barrel cover is used for detachable connection with the lubricating grease barrel, and the lubricating grease barrel can be replaced by disassembling and assembling the barrel cover;

[0047] A driving device;

[0048] A pumping mechanism comprises a pump base and a plunger pair assembly arranged on the pump base and driven by the driving device, the plunger pair assembly has a grease outlet for discharging lubricating grease and a grease inlet for sucking lubricating grease in the lubricating grease barrel, the pump base is further provided with an annular sealing element for sliding sealing cooperation with the inner wall of the lubricating grease barrel, and the driving device is fixed relative to the pump base;

[0049] The reversing valve mechanism includes a reversing valve and a reversing module, the reversing valve includes at least four oil ports, including a grease inlet port communicated with a grease outlet port of a plunger pair assembly, a grease return port for communicating with a grease tank, and first and second external grease outlet ports; the reversing valve is controlled by the reversing module, so that when the first external grease outlet port discharges grease and the second external grease outlet port returns grease, the first external grease outlet port is communicated with the grease inlet port through the reversing valve, and the second external grease outlet port is communicated with the grease return port through the reversing valve; when the first external grease outlet port returns grease and the second external grease outlet port discharges grease, the first external grease outlet port is communicated with the grease return port through the reversing valve, and the second external grease outlet port is communicated with the grease inlet port through the reversing valve;

[0050] The guide sleeve is connected with the tank cover at the upper end and is used as a guide for the movement of the pumping mechanism relative to the tank cover to limit the movement of the pumping mechanism along the central axis of the grease tank. The guide sleeve includes one sleeve segment or at least two sleeve segments that are telescopically and slidably connected with each other along the central axis of the grease tank.

[0051] The beneficial effects of the present scheme are as follows: as a double-line lubricating pump used in a centralized lubrication system, the lubricating pump is installed on the equipment to be lubricated, such as an excavator, together with a distributor, a pipeline bundle, etc. However, unlike a conventional lubricating pump, the lubricating pump does not have an oil tank, but uses a commercially available grease tank filled with lubricating grease as an external oil tank. That is, the lubricating pump of the present application directly cooperates with the grease tank to pump out the lubricating grease in the grease tank and pump it to the subsequent distributor and lubricating pipeline. The structure of the tank cover makes the cooperation of the lubricating pump and the grease tank very convenient and fast. Compared with the conventional method of pumping lubricating grease into the fixed oil tank of the lubricating pump on site using a grease supplementing device, the grease supplementing efficiency is greatly improved. Moreover, since the grease tank has a cover, direct replacement does not cause impurities to enter, ensuring that the quality of the oil is not affected, thereby ensuring the safety of the plunger pair and the like in the lubricating pump and reducing the failure rate. Since the oil tank of the conventional lubricating pump has a limited volume and cannot accommodate more lubricating grease, the frequency of grease supplementing is high. However, the lubricating pump of the present application directly uses the lubricating grease in the grease tank for pumping, and the capacity of the lubricating grease in the grease tank is large, so the lubricating pump can be used for a longer time, thereby reducing the frequency of grease supplementing. The reversing valve mechanism allows the lubricating pump to have two oil paths, constituting a double-line lubricating pump. The two oil paths can alternately supply grease, which is less likely to cause blockage and shutdown compared with a conventional progressive lubricating pump, and the pumping efficiency, pumping distance, etc. are improved compared with a conventional single-line lubricating pump. The guide sleeve allows the pump seat and the reduction motor to descend axially without any deviation, so that the grease inlet port is always in contact with the liquid level of the lubricating grease in the grease tank, ensuring that the lubricating pump does not run out of lubricating grease.

[0052] Further, at least one of the pipelines between the first external grease port, the second external grease port, the grease outlet and the grease inlet is connected with a pump seat quick connector or a three-way switch valve.

[0053] The beneficial effects of the present scheme are that the pump seat quick connector and the three-way switch valve are provided, so that the lubricating pump can be connected with other external accessories to realize more functions, such as being connected with a grease reel, and when the pipeline or the dispenser of the centralized lubricating system fails, the lubricating pump can be used as an emergency means to add grease to the lubricating point by using the grease reel, thereby playing the role of an electric grease gun.

[0054] Further, the lubricating pump further comprises a compression spring arranged on the barrel cover or the guide sleeve, so as to provide an elastic extrusion force downward to the pumping mechanism.

[0055] The beneficial effects of the present scheme are that the compression spring is provided, so that the pumping mechanism has an additional downward force under the premise of sinking by gravity, thereby ensuring that the pumping mechanism is more closely attached to the lubricating grease in the lubricating grease barrel, thereby avoiding the phenomenon of vacuuming, and making the lubricating pump work more stably.

[0056] Further, the driving device is a reduction motor, the reversing module is a mechanical reversing mechanism driven by an output rotating shaft of the reduction motor, the mechanical reversing mechanism comprises a lever mechanism and a poking member, the reversing valve comprises a valve core, a switching action of the valve core between valve positions is driven by a swinging action of the lever mechanism, the poking member is installed on the output rotating shaft of the reduction motor to rotate with the output rotating shaft, when the output rotating shaft of the reduction motor rotates forward, the poking member positively pokes the lever mechanism to make the lever mechanism swing forward, thereby making the reversing valve be in a valve position; when the output rotating shaft of the reduction motor rotates reversely, the poking member reversely pokes the lever mechanism to make the lever mechanism swing reversely, thereby making the reversing valve be in another valve position, at least one of the lever mechanism and the poking member is an elastic structure, when the output rotating shaft rotates forward or reversely, the poking member contacts the lever mechanism and drives the valve core to act, when the valve core switches to the corresponding valve position, the poking member and the lever mechanism relatively slide through the elastic deformation of the elastic structure.

[0057] The beneficial effects of the present scheme are that the mechanical reversing mechanism is directly driven by the output shaft of the reduction motor, without needing to additionally arrange a power source, and the reversing action of the mechanical reversing mechanism is stable and reliable.

[0058] Further, the driving device is a reduction motor, the reversing module is a mechanical reversing mechanism driven by an output rotating shaft of the reduction motor, the mechanical reversing mechanism comprises a lever mechanism and a poking member, the reversing valve comprises a valve core, and switching actions of the valve core between valve positions are driven by swinging actions of the lever mechanism; the poking member is installed on the output rotating shaft of the reduction motor to rotate with the output rotating shaft; when the output rotating shaft of the reduction motor rotates forward, the poking member positively pokes the lever mechanism to make the lever mechanism swing forward, so that the reversing valve is in one valve position; when the output rotating shaft of the reduction motor rotates reversely, the poking member reversely pokes the lever mechanism to make the lever mechanism swing reversely, so that the reversing valve is in another valve position; the pump base is provided with elastic structures on both sides of the lever mechanism; when the output rotating shaft rotates forward or reversely, the poking member is in contact with the lever mechanism to drive the valve core to act, and the elastic structures are compressed; when the valve core switches to the corresponding valve position, the poking member and the lever mechanism slide relative to each other, and the elastic structures provide elastic forces to the lever mechanism to reset the lever mechanism.

[0059] Further, the driving device is a reduction motor, the reversing valve comprises a valve core, the reversing module is a mechanical reversing mechanism driven by an output rotating shaft of the reduction motor, the mechanical reversing mechanism comprises a driving wheel and a driven wheel driven by the driving wheel, further comprises a circular-arc guide structure for guiding the driven wheel, so that the driving wheel drives the driven wheel to rotate around the rotation axis of the driving wheel, and the driven wheel can revolve around the rotation axis of the driving wheel along the circular-arc guide structure, further comprises a driven-wheel-valve-core transmission structure, so that the driven wheel drives the valve core to act linearly when revolving around the rotation axis of the driving wheel, and the reversing of the reversing valve is realized by controlling the reduction motor to change the rotation direction of the driving wheel, further comprises a to-position stopping structure for stopping the driven wheel after the driven wheel moves to position along the circular-arc guide structure.

[0060] Further, the reversing valve comprises a valve core, the reversing module comprises an electromagnet, and switching actions of the valve core between valve positions are driven by the electromagnet; the electromagnet is powered on and powered off to change the valve position of the reversing valve.

[0061] The scheme has the beneficial effects that the electromagnetic reversing has the characteristics of simple structure and low cost.

[0062] Further, the reversing module comprises an overflow valve installed on the reversing valve, and the reversing module controls the reversing valve through the overflow valve.

[0063] The scheme has the beneficial effects that the setting of the overflow valve constitutes a hydraulic reversing structure, and the structure is also relatively simple.

[0064] Further, the lubricating pump further comprises a controller for controlling the driving device to start, stop and adjust speed according to a set control logic, and the controller has a human-computer interaction module to facilitate adjustment of parameters of the lubricating pump according to different working conditions.

[0065] Further, an oil pressure switch, an overflow valve, a safety valve or an oil pressure sensor is arranged on the oil path between the oil outlet and the oil inlet or on the main oil path.

[0066] The beneficial effects of the present scheme: any one of the pressure switch, the oil pressure sensor, the safety valve and the overflow valve has the function of protecting the main oil path, preventing the main oil path from being damaged due to excessive pressure, and controlling the oil pressure of the main oil path not to exceed the maximum safe pressure; wherein the pressure switch can feed back to the controller when the pressure is too high to control the lubricating pump to stop, and the safety valve and the overflow valve can overflow when the pressure is too high to prevent the oil pressure from continuing to increase.

[0067] Further, the oil outlet is arranged on the upper part of the pump base, and the pumping mechanism has upper and lower limit positions when moving in the up-down direction, the bucket cover has an annular cavity with an open lower end or the bucket cover and the guide sleeve form an annular cavity with an open lower end, an oil pipe joint is arranged on the bucket cover, one end of the oil pipe joint is located in the annular cavity and the other end is located outside the bucket cover, an elastic adapter hose is arranged in the annular cavity, the upper end of the elastic adapter hose is connected with the oil pipe joint and the lower end is connected with the oil outlet, when the pumping mechanism is at the lower limit position, the elastic adapter hose is in the minimum bending state, when the pumping mechanism is at the upper limit position, the elastic adapter hose is in the maximum bending state, and the elastic adapter hose extends along the circumference of the annular cavity to a distance less than one circumference of the annular cavity and then reversely folds back.

[0068] The beneficial effects of the present scheme: since the elastic adapter hose is arranged in the annular cavity of the bucket cover or in the annular cavity of the bucket cover and the guide sleeve, and the upper end of the elastic adapter hose is connected to the fixed bucket cover through the oil pipe joint and the lower end is connected to the movable pump base, when the pump base moves upward relative to the bucket cover, the elastic adapter hose is bent or folded in a U-shaped state in the annular cavity, and when the pump base moves downward relative to the bucket cover, the elastic adapter hose is gradually pulled apart in the annular cavity, that is, during the entire operation of the pump base, only the elastic adapter hose is in the folded or stretched state, and the external oil pipe connected to the outer end of the oil pipe joint is not subjected to any pulling force or traction, and whether the external oil pipe is bent or restricted will not hinder the up-down movement of the pump base, ensuring that the pump base can operate normally and ensuring good oil output; furthermore, the elastic adapter hose and the external oil pipe are connected through the oil pipe joint fixed on the bucket cover, and the sealing between the outer peripheral surface of the fixed oil pipe joint and the hole wall of the corresponding mounting hole on the bucket cover is easy to achieve, and the sealing will not fail over time, which ensures that dust or mud outside the bucket cover cannot enter the bucket cover through the hole for installing the oil pipe, ensuring good waterproof and dustproof performance.

[0069] Further, a handle is fixed to the upper part of the driving device, and a lifting hole is arranged in the center of the bucket cover corresponding to the handle for lifting the handle through the lifting hole, and a protective cover is arranged on the detachable sealing cover of the lifting hole.

[0070] Further, the driving device is a reduction motor, and a transition wire is coiled in a space between the guide sleeve and the protective cover above the reduction motor, the lower end of the transition wire is connected with the reduction motor, and the upper end is fixed relative to the bucket cover, when the pumping mechanism is at the lower limit position, the transition wire is in the maximum stretched state, and when the pumping mechanism is at the upper limit position, the transition wire is in the coiled state.

[0071] The beneficial effects of the present scheme are that, since the reduction motor needs to be connected with the wire, and the wire is still unable to avoid causing the waterproof ability of the bucket cover to decrease and the wire to be externally limited to cause the pump seat to be unable to descend when the wire is moved through on the bucket cover, therefore, the transition wire is coiled in the space above the guide sleeve and the protective cover of the reduction motor, one end of the transition wire is connected with the movable reduction motor, and the other end is connected with the electric connector on the fixed bucket cover, when the reduction motor moves up and down, the transition wire is in the coiled and stretched state, and is not restricted by the wire when moving up and down, and since the connection between the transition wire and the bucket cover is fixed, there is no need to reserve a hole for the wire to move, and therefore the sealing at this position is easy to achieve.

[0072] Further, the handle includes a fixed part fixed relative to the reduction motor and a movable part slidingly installed on the fixed part in the up-down direction, the fixed part is provided with a stop structure matched with the movable part to limit the moving stroke of the movable part when moving upward, the handle is first moved upward to match the stop structure to move the fixed part upward when the handle is lifted, the pump seat and / or the annular sealing member is provided with a gas hole penetrating upward and downward, the gas hole is blocked by a valve, the valve is connected with a pull rope, the upper end of the pull rope is fixed on the movable part, and the pull rope is in a taut state, and the movable part can open the valve through the pull rope when the handle is pulled upward.

[0073] The beneficial effects of the present scheme are that, when the lubricating pump needs to be lifted out of the lubricating grease bucket, since the space between the lower surface of the pump seat and the bottom of the bucket or the liquid surface in the bucket is in a negative pressure state after being sucked, it is relatively laborious to directly lift the pump seat, and therefore the negative pressure state needs to be broken, that is, the space needs to be filled with air, however, in actual operation, workers are easy to forget to exhaust the air, and directly pull the handle, the present scheme sets the movable part on the handle, when the handle is lifted, the movable part is first moved to open the valve, and then moves the fixed part to lift the pump seat after exhausting the air, so that the operation convenience is greatly improved.

[0074] Further, the handle includes a fixed part fixed relative to the deceleration motor and a movable part slidingly installed on the fixed part in the up-down direction, the fixed part is provided with a stop structure matched with the movable part to limit the moving stroke of the movable part when moving upward, the movable part is first moved upward to match the stop structure when the handle is lifted, and then the fixed part is moved upward, a sealing assembly for slidingly sealing the inner wall of the lubricating grease barrel is arranged on the outer edge of the pump base, and the sealing assembly includes:

[0075] A rigid ring is arranged on the outer periphery of the pump base to slidingly match the outer peripheral surface of the pump base along the central axis, and the rigid ring is provided with a stop structure for limiting the lifting stroke of the pump base, and the rigid ring is moved by lifting the pump base;

[0076] A flexible ring plate is connected to the inner side of the rigid ring close to the central axis and the outer edge is used for slidingly sealing the inner barrel wall of the lubricating grease barrel;

[0077] An elastic sealing ring is connected to the rigid ring and / or the flexible ring plate and located on the inner side of the rigid ring and / or the flexible ring plate to seal the annular gap between the flexible ring plate and the outer surface of the pump base when the pump base is pressed down, so that air can pass through the annular gap on both sides of the flexible ring plate;

[0078] The rigid ring has a sealing position for sealing the annular gap between the flexible ring plate and the pump base and a disengagement position for disengaging the annular gap between the flexible ring plate and the pump base during the up-down movement of the rigid ring relative to the pump base; when the rigid ring moves from the disengagement position to the sealing position, the elastic sealing ring is pressed on the pump base to seal the annular gap; when the rigid ring moves from the sealing position to the disengagement position, the elastic sealing ring is disengaged from the pump base to allow air to pass through the annular gap;

[0079] A pull rope is connected to the movable part, and the other end of the pull rope is connected to the rigid ring, the pump base is provided with an outwardly convex winding post, the connection point of the pull rope and the rigid ring is located above the winding post, the pull rope is wound on the winding post, and the pull rope is in a taut state; when the handle is pulled upward, the movable part can drive the rigid ring to move downward relative to the pump base to allow air to pass through the annular gap.

[0080] The beneficial effects of the present scheme are: by arranging the movable part on the handle, the movable part is first moved to move the rigid ring relative to the pump base to open the annular gap between the two to realize air intake, and then the fixed part is moved to lift the pump base after exhaust, so that the operation convenience is greatly improved.

[0081] Further, one of the first and second external grease ports is connected with a pump seat quick connector, and the lubricating system further comprises a grease feeding reel, the grease feeding reel comprising a reel support and a coiled grease feeding pipe, one end of the grease feeding pipe being provided with a reel quick connector adapted to be plugged with the pump seat quick connector, the other end of the grease feeding pipe being provided with a grease feeding gun adapted to be plugged with a grease nozzle of a lubrication point.

[0082] Further, the lubricating system further comprises a grease feeding reel, the grease feeding reel comprising a reel support and a coiled grease feeding pipe, one of the first and second external grease ports being connected with a three-way switch valve, the other two ways of the three-way switch valve being communicated with one of the inlets of the distributor and the grease feeding pipe respectively, the other end of the grease feeding pipe being provided with a grease feeding gun adapted to be plugged with a grease nozzle of a lubrication point, the first and second external grease ports being selectively connected with one of the grease feeding pipe and the distributor through the three-way switch valve.

[0083] Further, the distributor is a double-line distributor, two inlets of the double-line distributor being connected with the first and second external grease ports, at least one outlet of the double-line distributor being connected with a progressive distributor, an outlet of the progressive distributor being connected with an oil pipe to a lubrication point of the equipment to be lubricated.

[0084] The double-line progressive lubricating system has the advantages of high stability and high expandability.

[0085] Further, the distributor is a double-line distributor, at least two double-line distributors being provided in parallel or in series.

[0086] The double-line progressive lubricating system has the advantages of high stability and high expandability.

[0087] Further, the distributor is a progressive distributor, comprising two mother progressive distributors and at least two son progressive distributors, two inlets of the two mother progressive distributors being communicated with the first and second external grease ports respectively, at least one son progressive distributor being connected with one outlet of the two mother progressive distributors respectively.

[0088] The double-line progressive lubricating system has the advantages of high stability and high expandability.

[0089] Further, the double-line centralized lubricating system further comprises at least one grease suction device for sucking waste lubricating grease of the equipment.

[0090] The beneficial effects of the scheme are that the setting of the grease suction and discharge device enables the centralized lubricating system to also have the function of sucking and discharging waste lubricating grease, and when the waste lubricating grease in a certain place on the equipment is not convenient to directly seep out and the amount is large, the grease suction and discharge device can be set to collect the waste lubricating grease, so as to avoid the pollution of the environment by the waste lubricating grease.

[0091] Further, the distributor comprises a double-line distributor and a progressive distributor, the pipeline comprises a main oil path, the main oil path comprises A and B oil paths respectively communicating with the first and second external grease outlets, the double-line distributor is at least one and has two first inlets and a plurality of first outlets, the two first inlets respectively communicate with the two main oil paths, and the plurality of first outlets are respectively used for communicating with each lubrication point in a certain region of the equipment or at least one of the plurality of first outlets is used for communicating with each lubrication point in a certain region of the equipment through a next-stage distributor and the remaining first outlets are used for communicating with other lubrication points, and the progressive distributor is one or two and has a second inlet and a plurality of second outlets used for communicating with lubrication points in another region of the equipment, when the progressive distributor is one, the second inlet communicates with one of the A and B oil paths, and when the progressive distributor is two, the respective second inlets are connected to the A and B oil paths.

[0092] The beneficial effects of the scheme are that the progressive distributor is connected to the main oil path, and taking the excavator as an example, the outlets of the double-line distributor are connected to the lubrication points on the boom and the stick, and the outlets of the progressive distributor are connected to the lubrication points of the draw head and the connecting rod, since the connecting rod and the draw head are far away from the double-line lubricating pump, the corresponding pipeline is long and the pipe resistance is large, under normal circumstances, the double-line distributor works first, the lubricating grease of the lubricating pump is pumped out from one of the A and B oil paths, first enters the reversing spool of the double-line distributor, then enters the metering plunger, and then pumps the lubricating grease in the metering cavity to the lubrication points of the boom and the stick through the corresponding outlet and pipeline, at the same time, the lubricating grease of the main oil path enters the progressive distributor, so that the outlets of the progressive distributor alternately discharge the lubricating grease to pump the lubricating grease to the lubrication points of the draw head and the connecting rod, since the oil demand of the connecting rod and the draw head is large, under the control of the controller, the progressive distributor can work for multiple strokes until the pumped lubricating grease meets the demand of the lubrication points of the connecting rod and the draw head, and when different models are replaced, different working modes are replaced, the lubricating grease demand of the connecting rod or the draw head region changes under different temperatures and different pipeline lengths, only the working time of the progressive distributor needs to be adjusted by the controller, and the adjustment of the working time of the distributor is realized by different actions of the double-line lubricating pump, without the need to set complex components such as solenoid valves. Subsequently, until the discharge amount of the progressive distributor meets the requirements, the reversing valve mechanism is controlled to reverse, and another main oil path is changed to discharge the grease, and the spools in the double-line distributor are reversed, so that another cycle is entered.

[0093] From the above working process, it can be seen that the grease output of the double-line distributor is distributed by its own structure, and the progressive distributor is distributed by its own structure and the working time controlled by the controller. In other words, the total grease output of the double-line distributor is determined by the diameter of the plunger itself, and the grease output of the progressive distributor is no longer limited by the diameter of the plunger itself, but is related to the working time and the diameter of the plunger. For lubrication points with different oil requirements, only the working time of the progressive distributor needs to be adjusted, without adjusting the plunger structure of the progressive distributor or replacing the progressive distributor. This makes it possible to adapt to any type of construction machinery, regardless of the type of construction machinery, regardless of the working mode of the construction machinery, regardless of the temperature, pipe length, etc. Changes in the oil requirements of each lubrication point can be achieved by adjusting the working time of the progressive distributor to meet the changes in different oil requirements, greatly improving the adaptability. In other words, by arranging the double-line distributor on the A and B oil lines close to the pump, and arranging the progressive distributor at the end of the A and B oil lines, and controlling the opening time of the A and B oil lines, the normal oil output of the double-line distributor can be ensured, and the differential grease supply of the progressive distributor connected by the A and B oil lines can be realized, realizing the function of partition control and meeting the adjustment of oil quantity ratio under different working conditions of the host machine.

[0094] Through this scheme, the current situation that the discharge capacity of the distributor of the existing centralized lubrication system is determined by the size of the plunger can be changed, so that the same size of the distributor can be suitable for more discharge capacity requirements, adapt to different lubrication scenarios, facilitate standardization of the distributor, effectively reduce the cost, and facilitate real-time adaptive adjustment of the discharge capacity through the controller, so that the centralized lubrication system is no longer a virtual system, and effectively plays the function of centralized lubrication.

[0095] In summary, the scheme has the advantages of simple system structure, small and standard size of the distributor, suitable for lubrication of lubrication points with different oil requirements without replacing the distributor, easy to increase or decrease the number of lubrication points, strong expansibility, easy to detect faults, easy to set up the corresponding lubrication mode according to the different working modes of the equipment, can control each lubrication point in different regions, and the oil requirements of each region are not interfered with each other when adjusting the grease supply, the working time of the progressive distributor connected on the two main oil lines can be different to realize different discharge capacity requirements, and the lubrication amount can be flexibly adjusted in the use process, different parts can be lubricated in different regions, the standardization degree is higher, and the lubricating oil amount can be dynamically adjusted when the working condition changes.

[0096] Further, the distributor comprises single-line distributors and progressive distributors, the pipeline comprises a main oil circuit, the main oil circuit comprises A and B oil circuits respectively communicating with the first and second external grease ports; the single-line distributors are at least one, each single-line distributor has one first inlet and multiple first outlets, when there is one single-line distributor, the first inlet communicates with one of the A and B oil circuits; when there are at least two single-line distributors, the first inlets of the single-line distributors are connected to at least one of the A and B oil circuits respectively; the multiple first outlets are respectively used for communicating with the lubrication points in a certain area of the equipment, or at least one of the multiple first outlets is used for communicating with the lubrication points in a certain area of the equipment through a next-stage distributor, and the remaining first outlets are used for communicating with other lubrication points; the progressive distributors are one or two, each progressive distributor has a second inlet and multiple second outlets used for communicating with the lubrication points in another area of the equipment, when there is one progressive distributor, the second inlet communicates with one of the A and B oil circuits; when there are two progressive distributors, the second inlets of the progressive distributors are connected to the A and B oil circuits respectively.

[0097] Further, at least one of the A and B oil circuits is provided with a split oil switch valve or at least two on-off valves; the split oil switch valve has at least two oil outlet circuits, the split oil switch valve is used to switch the conduction of the oil outlet circuits and the corresponding main oil circuit, each on-off valve has one oil outlet circuit, the on-off valve is used to switch the conduction of the oil outlet circuit and the corresponding main oil circuit.

[0098] The beneficial effects of the present scheme are as follows: the split oil switch valve or the at least two on-off valves are provided, so that the oil outlet time of each oil outlet circuit can be independently controlled, for example, the oil outlet of the progressive distributor can be controlled first until the lubrication requirement is met, then the oil outlet of another oil outlet circuit is switched until the lubrication requirement of the oil outlet circuit is met, and the independent time-sharing oil supply purpose can be achieved before the single-line distributor is unloaded or before the double-line distributor is reversed.

[0099] Further, the distributor is a double-line distributor, the pipeline comprises a main oil circuit, the main oil circuit comprises A and B oil circuits respectively communicating with the first and second external grease ports; the double-line distributor is at least one and has two first inlets and a plurality of first outlets, the two first inlets respectively communicate with the two main oil circuits, and the plurality of first outlets are respectively used for communicating with each lubrication point in a certain region of the equipment through branch pipelines; or at least one of the plurality of first outlets is used for communicating with each lubrication point in a certain region of the equipment through a next-stage distributor, and the remaining first outlets are used for communicating with other lubrication points; the double-line distributor comprises a reversing valve core, the pressure of the first inlet is greater than the reversing resistance of the reversing valve core, and the pressure of the first inlet is also greater than the along-the-way resistance of each branch pipeline to the corresponding lubrication point; the pipeline further comprises one or two independent lubricating oil circuits, when there is one, one end of the independent lubricating oil circuit is connected to one of the two main oil circuits, and the other end is used for communicating with the lubrication point in another region of the equipment; when there are two, the two independent lubricating oil circuits respectively communicate with the two main oil circuits, and the rear ends of the two independent lubricating oil circuits are respectively used for communicating with the lubrication points in other two regions of the equipment; the grease output of the independent lubricating oil circuit is determined by the running time length set by the lubricating pump. In the scheme, the grease output of the double-line distributor per cycle is fixed, and the grease output of the independent lubricating oil circuit is proportional to the grease output time of the corresponding main oil circuit, that is, proportional to the working time of the lubricating pump, so that the purposes of partition control and adjustment can be achieved.

[0100] Further, the distributor is a single-line distributor, the pipeline comprises a main oil circuit, the main oil circuit comprises A and B oil circuits respectively communicating with the first and second external grease ports; the single-line distributor is at least one and has a grease inlet and a plurality of grease outlets, the single-line distributor communicates with the main oil circuit through the grease inlet, and the plurality of grease outlets are respectively used for communicating with each lubrication point in a certain region of the to-be-lubricated mechanical equipment through branch oil pipes, or at least one of the plurality of grease outlets is used for communicating with each lubrication point in a certain region of the to-be-lubricated mechanical equipment through a next-stage distributor, and the remaining grease outlets are used for communicating with other lubrication points, the single-line distributor has a reversing plunger, the pressure of the grease inlet is greater than the reversing resistance of the reversing plunger, and the pressure of the grease inlet is also greater than the along-the-way resistance of each branch oil pipe to the corresponding lubrication point; the pipeline further comprises at least one independent lubricating oil circuit, one end of the independent lubricating oil circuit communicates with the main oil circuit, and the other end is used for communicating with the lubrication point in another region of the to-be-lubricated mechanical equipment; the grease output of the independent lubricating oil circuit is determined by the running time length set by the lubricating pump. In the scheme, the grease output of the single-line distributor per cycle is fixed, and the grease output of the independent lubricating oil circuit is proportional to the grease output time of the corresponding main oil circuit, that is, proportional to the working time of the lubricating pump, so that the purposes of partition control and adjustment can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0101] Figure 1Structure diagram of one embodiment of the double-line centralized lubrication system of the present application when installed on an excavator;

[0102] Figure 2 Structure diagram of embodiment 1 of the double-line centralized lubrication system of the present application;

[0103] Figure 3 Structure diagram of the lubrication pump in Figure 2 ;

[0104] Figure 4 Working principle diagram of the lubrication pump;

[0105] Figure 5a Working principle diagram of mechanical commutation of the lubrication pump in Figure 3 ;

[0106] Figure 5b Working principle diagram of mechanical commutation of the lubrication pump in Figure 3 ;

[0107] Figure 6a , 6b , 6c, 6d are working principle diagrams of each state of hydraulic commutation;

[0108] Figure 7 Structure diagram of embodiment 2 of the double-line centralized lubrication system of the present application;

[0109] Figure 8 Structure diagram of embodiment 3 of the double-line centralized lubrication system of the present application;

[0110] Figure 9 Structure diagram of embodiment 4 of the double-line centralized lubrication system of the present application;

[0111] Figure 10 Structure diagram of embodiment 5 of the double-line centralized lubrication system of the present application;

[0112] Figure 11 Structure diagram of embodiment 6 of the double-line centralized lubrication system of the present application;

[0113] Figure 12 Structure diagram of embodiment 7 of the double-line centralized lubrication system of the present application;

[0114] Figure 13 Structure diagram of embodiment 8 of the double-line centralized lubrication system of the present application;

[0115] Figure 14 Longitudinal section diagram of the corresponding lubrication pump in embodiment 9 of the double-line centralized lubrication system;

[0116] Figure 15 Longitudinal section diagram of the corresponding lubrication pump in embodiment 9 of the double-line centralized lubrication system;Figure 14 Figure 6 is a perspective view of the bucket cover being removed;

[0117] Figure 16 Figure 7 is a perspective view of the protective cover being removed; Figure 15 Figure 8 is a perspective view of the exhaust structure being removed;

[0118] Figure 17 Figure 9 is a perspective view of the exhaust structure being removed;

[0119] Figure 18 Figure 10 is a schematic diagram of the system working principle of the double-line centralized lubrication system embodiment 10;

[0120] Figure 19 Figure 11 is a schematic diagram of the system working principle of the double-line centralized lubrication system embodiment 11;

[0121] Figures 1-5b and 7-13, 18: 1-excavator, 11-link, 2-lubricating pump, 21-bucket cover, 22-buckle, 23-reduction motor, 231-motor output shaft, 24-pump seat, 25-ring seal, 26-mechanical reversing valve, 261-valve core, 262-valve body, 263-lever mechanism, 264-pusher, 265-spring clip, 266-hinge shaft, 27-guide sleeve, 28-controller, 3-lubricating grease bucket, 4-automatic return oiling capstan, 5-double-line distributor, 51-first inlet, 52-first outlet, 6-gradual distributor, 61-second inlet, 62-second outlet, A, B are main oil paths, P is a grease inlet, T is a grease return, C is an oil pipe to a lubrication point, 7-two-position three-way switch valve, 8-check valve, 9-breaking hammer, 10-fast plug-in oil pipe joint, 20-two-position four-way reversing valve, 30-overflow valve, 40-pressure differential switch; 70-single-line distributor, 71-first inlet, 72-first outlet, 80-detachable oil pipe joint, K-independent lubricating oil path;

[0122] Figures 6a-6d in which: 7-pressure adjusting bolt, P1, P2, P3 are plungers, L1, L2, P, R are oil ports;

[0123] Figures 14-17 in which: 1-lubricating grease bucket, 2-pumping mechanism, 21-pump seat, 22-grease outlet, 23-reduction motor, 24-ring seal, 25-valve, 26-pull rope, 3-guide sleeve, 31-innermost sleeve segment, 311-top plate, 32-handle, 321-fixed part, 322-movable part, 33-outermost sleeve segment, 4-bucket cover, 41-annular cavity, 42-oil pipe joint, 43-monitor, 44-lifting hole, 45-protective cover, 47-buckle, 5-flexible adapter hose, 6-adapter wire;

[0124] Figure 19Fig. 1 is a schematic diagram of a double-line centralized lubrication system according to the present application. In Fig. 1, 1 is a lubricating pump, 11 is a speed reducer motor, 12 is a plunger pair, 13 is an oil tank, 15 is a controller, 17 is an overflow valve, 18 is a two-position four-way directional control valve, 2 is a main oil passage, 3 is a single-wire distributor, 4 is a check valve, 10 is a friction pair, 101 is a lubrication point, and 20 is a detachable oil pipe joint. K is an independent lubricating oil passage. DETAILED DESCRIPTION

[0125] Embodiment 1 of the double-line centralized lubrication system according to the present application is as follows: Figure 1 , 2As shown, the double-line centralized lubricating system comprises a lubricating pump 2, a double-line distributor 5 and pipelines, the lubricating pump 2 comprises a barrel cover 21 for covering on a lubricating grease barrel 3, the barrel cover 21 has a connecting structure for detachable connection with the lubricating grease barrel 3, the lubricating grease barrel 3 is replaced by detaching and attaching the connecting structure, the barrel cover 21 is provided with a guide sleeve 27 for bearing, fixing and guiding the pump base, and is provided with a buckle for connecting with the barrel. It also comprises a driving device; a pumping mechanism, the pumping mechanism comprises a pump base 24 and a plunger pair assembly provided on the pump base 24 and driven by the driving device, the plunger pair assembly has a grease outlet for discharging lubricating grease and a grease inlet for sucking lubricating grease in the lubricating grease barrel 3, the pump base 24 is further provided with an annular sealing element 25 for sliding sealing cooperation with the inner wall of the lubricating grease barrel 3, and the driving device is fixed relative to the pump base 24; a reversing valve mechanism, the reversing valve mechanism is installed on the pump base 24 and comprises a reversing valve and a reversing module, the reversing valve comprises at least four oil ports, including a grease inlet P communicated with the grease outlet of the plunger pair assembly, a return grease port T for communicating with the lubricating grease barrel 3 and first and second external lubricating grease ports A and B (since the first and second external lubricating grease ports are communicated with main oil paths A and B, the first and second external lubricating grease ports are marked as A and B for the convenience of understanding the corresponding relationship between them); the reversing valve is controlled by the reversing module, so that when the first external lubricating grease port A discharges and the second external lubricating grease port B returns, the first external lubricating grease port A is communicated with the grease inlet P through the reversing valve and the second external lubricating grease port B is communicated with the return grease port T through the reversing valve; when the first external lubricating grease port A returns and the second external lubricating grease port B discharges, the first external lubricating grease port A is communicated with the return grease port T through the reversing valve and the second external lubricating grease port B is communicated with the grease inlet P through the reversing valve; a guide sleeve 27, the upper end of the guide sleeve 27 is connected with the barrel cover 21, which is used as a guide for the movement of the pumping mechanism relative to the barrel cover 21, so as to limit the movement of the pumping mechanism along the central axis of the lubricating grease barrel 3, the guide sleeve 27 comprises one sleeve segment or at least two sleeve segments which are slidingly matched with each other along the central axis of the lubricating grease barrel 3, when there is one sleeve segment, the upper and lower ends of the sleeve segment are respectively limited in position with the barrel cover and the pumping mechanism, that is, the upper end of the sleeve segment is provided with an outward turning edge for stopping cooperation with the hole edge of the corresponding hole on the barrel cover, and the lower end of the sleeve segment is provided with an inward turning edge for stopping cooperation with the outward turning edge on the pumping mechanism. When there are more sleeve segments, the first segment can be fixed on the barrel cover and the last segment can be fixed on the pumping mechanism, and they slide relative to the middle segments. In this embodiment, the reversing valve structure is a whole structure, and in other embodiments, the reversing valve structure can also be a split structure, for example, split into a two-position three-way valve and two two-position two-way valves.

[0126] The pipeline between the first external grease port A, the second external grease port B, the grease outlet and the grease inlet P, of which at least one is connected with the pump seat quick connector or the three-way switch valve 7, which is a three-way switch valve 7 in the embodiment. The driving device is a speed reducer motor 23, which can also be replaced by a pneumatic motor or a hydraulic motor in other embodiments. The reversing module is a mechanical reversing mechanism driven by the output shaft (i.e. motor output shaft 231) of the speed reducer motor 23. The mechanical reversing mechanism includes a lever mechanism 263 and a knob 264. The reversing valve includes a valve core 261. The switching action between the valve positions is driven by the swinging action of the lever mechanism 263. The knob 264 is installed on the output shaft of the speed reducer motor 23 to rotate with the output shaft. When the output shaft of the speed reducer motor 23 rotates forward and backward, the knob 264 drives the lever mechanism 263 forward and backward to make the lever mechanism 263 swing back and forth, thereby changing the valve position of the reversing valve. The pump seat is provided with elastic structures on both sides of the lever mechanism 263. When the output shaft rotates forward or reversely, the knob 264 contacts the lever mechanism 263 and drives the valve core 261 to move. The elastic structure is compressed. When the valve core 261 switches to the corresponding valve position, the knob 264 and the lever mechanism 263 slide relative to each other, and the elastic structure provides elastic force to the lever mechanism 263 to reset it. The lubricating pump 2 further comprises a controller 28 for controlling the driving device to start, stop and adjust the speed according to the set control logic. The controller 28 has a human-computer interaction module to facilitate the adjustment of the parameters of the lubricating pump 2 according to different working conditions.

[0127] In the embodiment, the working principle of the pump is as follows: as shown in Figure 4 When the power is turned on, the speed reducer motor 23 starts to operate, the transmission shaft drives the eccentric wheel or cam and the plunger assembly to suck the grease from the grease bucket 3 and send the sucked grease to the mechanical reversing valve 26 through the grease inlet P. The grease in the lubricating system B main oil way is discharged into the grease bucket 3 through the return grease port T. When the pressure of the main oil way A reaches the reversing pressure or the running time reaches the time set by the controller 28, the pressure maintaining stage is entered. When the pressure maintaining stage is over, the speed reducer motor 23 reverses to rotate, which in turn drives the mechanical reversing valve 26 to reverse (see Figure 5a 、 5bMechanical directional valve 26 switches to another position, in which P is connected to B and A is connected to T. At this time, the grease output from mechanical directional valve 26 enters the main oil circuit B through the grease inlet P, while the grease in the main oil circuit B flows back to the grease tank 3 through the grease return inlet T to unload. When the pressure in the main oil circuit B reaches the switching pressure or the running time reaches the time set by controller 28, it enters the pressure holding stage. After the pressure holding stage ends, the reduction motor 23 rotates in the reverse direction for 5 seconds to unload, and then enters a rest state. During the operation of the reduction motor 23, if the pressure in the main oil circuit rises to the opening pressure of the safety relief valve 30, the main oil circuit pressure is then maintained at the opening pressure of the safety relief valve 30, and excess grease overflows back to the grease tank 3 through the safety relief valve 30. The system pressure remains at the pressure value set by the safety relief valve 30.

[0128] In other embodiments, the relief valve 30 can also be replaced by a safety valve, whose usage and function are basically the same as the relief valve, and will not be described in detail here. Of course, the relief valve can also be replaced by a hydraulic switch or a hydraulic sensor. The hydraulic switch can be installed in the oil line between the grease outlet and the grease inlet, or one can be installed in each of the two main oil lines. The hydraulic switch can control the pump to stop when it detects that the pressure has reached the set maximum pressure. The hydraulic sensor can feed back the detected pressure value to the controller, which compares it with the set value; if the set value is reached, the controller controls the pump to stop.

[0129] In this embodiment, the dual-line centralized lubrication system further includes an automatic return oiling reel 4. The automatic return oiling reel 4 includes a reel support and a wound grease tube. One of the first and second external grease ports A and B is connected to a three-way switching valve 7. The other two paths of the three-way switching valve 7 are respectively connected to one inlet of the distributor and the grease tube. The other end of the grease tube is equipped with a grease gun that can be inserted and mated with a grease nipple at the lubrication point. The three-way switching valve 7 allows one of the first and second external grease ports to be selectively connected to one of the grease tube and one of the distributors. In other embodiments, the automatic return oiling reel can also be replaced with a hand-cranked return oiling reel, which is wound up by a crank handle.

[0130] In other embodiments, a pump seat quick connector is connected to one of the first and second external grease inlets. The dual-line centralized lubrication system also includes an automatic return grease reel, which includes a reel support and a wound grease tube. One end of the grease tube is provided with a reel quick connector that can be adapted to the pump seat quick connector, and the other end of the grease tube is provided with a grease gun that can be used to engage with a grease nipple at the lubrication point. One of the distributor inlets is connected to a distributor quick connector that can be adapted to the pump seat quick connector. The pump seat quick connector can be selectively connected to either the distributor quick connector or the reel quick connector.

[0131] In this embodiment, the two inlets of the dual-line distributor are connected to the first and second external grease ports, and a progressive distributor is connected to at least one outlet of the dual-line distributor. The dual-line distributor, the progressive distributor, and the pipeline are installed and fixed on the equipment to be lubricated. The outlet of the progressive distributor is connected to the lubrication point of the equipment to be lubricated via an oil pipe. In other embodiments, such as... Figure 7 , 8 As shown, the distributor is a two-line distributor 5, and there are at least two two-line distributors 5, which are connected in parallel or in series.

[0132] In other embodiments, the dispenser is a progressive dispenser 6, which includes two female progressive dispensers and at least two female progressive dispensers. The inlets of the two female progressive dispensers are respectively connected to the first and second external grease ports, and at least one female progressive dispenser is connected to one of the outlets of the two female progressive dispensers.

[0133] In this embodiment, the dual-line centralized lubrication system also includes at least one grease suction device for sucking up waste grease from the equipment.

[0134] like Figure 2 , 3 As shown, lubrication pump 2, as the power source of the centralized lubrication system, pumps lubricating grease at fixed times, locations, and quantities under the control of the control program, such as... Figure 3 As shown, the lubrication pump 2 includes a lid 21, which is used to cover the grease container 3. The outer periphery of the lid 21 has a connecting structure for detachable connection with the grease container 3. The grease container 3 can be replaced by removing and installing the connecting structure. In this embodiment, the connecting structure is a snap-fit ​​22, which can be snapped into place with the rim of the grease container 3. When in use, the lid 21 is placed on the grease container 3. The snap-fit ​​22 has a certain elasticity and automatically snaps into place when pressed down. The grease container 3 refers to commercially available drummed grease. The packaging drum is a standard weight and standard shape and size drum, commonly 5 kg, 10 kg, 15 kg, etc. When sold, the grease is full in the packaging drum, and the packaging drum is covered with a dust cover. When used with the lubrication pump 2 of this application, the original dust cover of the standard oil drum needs to be removed, and then the lid 21 of the lubrication pump 2 is connected to the grease container 3. In other embodiments, the detachable connection structure may also be a hook-type snap-on 22 or a quick-connect bolt structure, etc.

[0135] The lubricating pump 2 further comprises a driving device, which in this embodiment comprises a speed reducer motor 23 and motor drive and the like. The speed reducer motor 23 is mainly used to drive the plunger pair mechanism of the lubricating pump 2 to act. The specific implementation is that the output shaft of the speed reducer motor 23 drives the cam or eccentric wheel to rotate, and then drives the plunger to reciprocate linearly in cooperation with the eccentric wheel. The return mode of the plunger can be spring return, or the eccentric wheel is provided with an annular groove, and the end of the plunger is slidably connected with a hook structure in the annular groove. When the eccentric wheel rotates, it drives the plunger to reciprocate. In other embodiments, the driving device can also adopt a pneumatic system, a gas pump and corresponding control valves and controllers, etc., to directly drive the plunger to act. Of course, the lubricating pump 2 can also be provided with a gas control interface, and the lubricating pump 2 is supplied with gas through the interface connected with an external gas source, and the gas drives the plunger pair to act. Similarly, the pneumatic system can also be replaced by a hydraulic system or an external hydraulic drive oil port. However, the hydraulic system needs to be provided with a container for storing hydraulic medium and related accessories.

[0136] The lubricating pump 2 further comprises a pumping mechanism, which comprises a pump base 24 and a plunger pair assembly provided on the pump base 24 and driven by the driving device. The plunger pair assembly has a grease outlet for discharging the lubricating grease and a grease inlet for pumping the lubricating grease in the lubricating grease barrel 3. The pump base 24 is further provided with an annular sealing member 25 for slidably and sealingly cooperating with the inner wall of the lubricating grease barrel 3, and the driving device is fixed relative to the pump base 24. The annular sealing member 25 is a large-diameter annular sealing ring made of flexible rubber or resin and the like. The structure of the pump base 24 comprises a disc-shaped base body and a sliding groove and an oil channel on the base body. The sliding groove is slidably connected with a sliding block, and the sliding block drives the reversing module to reverse. The disc-shaped base body and the annular sealing member 25 constitute the main frame of the oil pressing disc. In this embodiment, the plunger pair assembly has three groups, which are driven by the same eccentric shaft or eccentric wheel or cam. When the plungers of the plunger pair assembly reciprocate, the lubricating grease in the lubricating grease barrel 3 can be pumped out. The plunger pair assembly is installed on the pump base 24, and the grease inlet of the plunger pair assembly is located below, so as to facilitate pumping the lubricating grease when contacting the liquid level of the lubricating grease barrel 3.

[0137] The upper end of the guide sliding sleeve is connected with the barrel cover 21, which is used as a guide for the movement of the pumping mechanism relative to the barrel cover 21, so as to limit the movement of the pumping mechanism along the central axis of the lubricating grease barrel 3. The guide sliding sleeve comprises one sliding sleeve segment or at least two sliding sleeve segments which are slidably connected with each other along the central axis of the lubricating grease barrel 3.

[0138] As Figure 3As shown, the lubricating pump is used by covering the lubricating grease barrel with the barrel cover and buckling the annular downward turned edge outside the barrel edge of the lubricating grease barrel. The buckle is elastic and ensures that the barrel cover is fixed as a whole with the lubricating grease barrel after buckling. The barrel cover can be used as a fixed support. The pump base and the speed reducer motor can move up and down relative to the barrel cover through the guide sliding sleeve, so that the grease inlet of the plunger pair assembly can be in direct contact with the lubricating grease in the lubricating grease barrel, and as the liquid level in the lubricating grease barrel decreases, the pump base also decreases.

[0139] Regarding the reversing valve mechanism, there are the following implementation manners:

[0140] 1. The first mechanical reversing structure: the lubricating pump further comprises a reversing valve mechanism, the reversing valve mechanism comprising a reversing valve and a reversing module, the reversing valve comprising at least four oil ports, including a grease inlet port communicated with the grease outlet port of the plunger pair assembly, a grease return port for communicating with the lubricating grease barrel and first and second external lubricating grease ports; the reversing valve is controlled by the reversing module, so that when the first external lubricating grease port discharges and the second external lubricating grease port returns grease, the first external lubricating grease port is communicated with the grease inlet port through the reversing valve and the second external lubricating grease port is communicated with the grease return port through the reversing valve; when the first external lubricating grease port returns grease and the second external lubricating grease port discharges, the first external lubricating grease port is communicated with the grease return port through the reversing valve and the second external lubricating grease port is communicated with the grease inlet port through the reversing valve. The reversing module in this embodiment is a mechanical reversing mechanism driven by the output shaft of the speed reducer motor. The mechanical reversing mechanism comprises a lever mechanism and a poking member. The reversing valve comprises a valve core. The switching action of the valve core between the valve positions is driven by the swinging action of the lever mechanism. The poking member is installed on the output shaft of the speed reducer motor to rotate with the output shaft. When the output shaft of the speed reducer motor rotates forward, the poking member positively pokes the lever mechanism to make the lever mechanism positively swing, thereby making the reversing valve be in one valve position. When the output shaft of the speed reducer motor rotates reversely, the poking member reversely pokes the lever mechanism to make the lever mechanism reversely swing, thereby making the reversing valve be in another valve position. At least one of the lever mechanism and the poking member is an elastic structure. When the output shaft rotates forward or reversely, the poking member contacts the lever mechanism and drives the valve core to act. When the valve core switches to the corresponding valve position, the poking member and the lever mechanism relatively slide through the elastic deformation of the elastic member. The structure of the mechanical reversing mechanism can refer to the structure of the reversing valve and the lever mechanism in the patent with the application publication number CN109707983A.

[0141] 2. The second mechanical reversing structure: the reversing module is a mechanical reversing mechanism driven by the output shaft of the speed reducer motor, as shown in Figure 5a , 5bAs shown, the mechanical reversing mechanism includes a lever mechanism 263 and a poking member 264, the reversing valve includes a valve core 261, the switching action of the valve core between valve positions is driven by the swinging action of the lever mechanism, the poking member is installed on the output rotating shaft 231 of the reduction motor to rotate with the output rotating shaft, when the output rotating shaft of the reduction motor reciprocates in forward and reverse directions, the poking member pokes the lever mechanism in forward and reverse directions to make the lever mechanism reciprocate to make the reversing valve change valve positions, the pump seat is provided with elastic structures on both sides of the lever mechanism, when the output rotating shaft rotates in forward or reverse direction, the poking member contacts the lever mechanism and drives the valve core to act, the elastic structures are compressed, when the valve core switches to the corresponding valve position, the poking member and the lever mechanism slide relative to each other, and the elastic structures provide elastic force to the lever mechanism to reset. The structure of the mechanical reversing mechanism refers to the structures of the reversing valve and the lever mechanism in the patent with the application publication number CN109707982A. In this embodiment, the elastic structure is a "U"-shaped spring clip 265, the lever mechanism is composed of two sections that are hinged to each other, and the elastic force of the spring clip makes the two sections keep a trend of being collinear.

[0142] 3. The third major mechanical reversing structure: the reversing valve includes a valve core, and the reversing module is a mechanical reversing mechanism driven by the output rotating shaft of the reduction motor. The mechanical reversing mechanism includes a driving wheel and a driven wheel driven by the driving wheel, and further includes a circular arc guide structure for guiding the driven wheel, so that the driving wheel drives the driven wheel to rotate while the driven wheel can revolve around the rotating axis of the driving wheel along the circular arc guide structure. The mechanical reversing mechanism further includes a driven wheel-valve core transmission structure, so that the driven wheel drives the valve core to move linearly when revolving around the rotating axis of the driving wheel. The reversing of the reversing valve is achieved by controlling the reduction motor to change the rotating direction of the driving wheel. The mechanical reversing mechanism further includes a position stopping structure for stopping the driven wheel after it moves to a position along the circular arc guide structure. The specific structure of this type of mechanical reversing mechanism can be found in the structures of various embodiments disclosed in two patents with the authorization publication numbers CN214064540U and CN214064541U. In this type of mechanical reversing structure, the driving wheel and the driven wheel can be implemented in the following ways: gear and gear transmission, driving sprocket and driven sprocket transmission through chain, worm and gear transmission, screw and nut transmission, friction wheel transmission, gear and rack transmission, etc.

[0143] 4. Electromagnetic reversing structure:

[0144] The reversing valve includes a valve core, and the reversing module includes an electromagnet. The switching action of the valve core between valve positions is driven by the electromagnet. The electromagnet is powered on and off to change the valve position of the reversing valve.

[0145] 5. Hydraulic reversing structure:

[0146] Figure 6ashows the grease from the lubrication pump entering the oil circuit L1, when all the distributors are supplied, the pressure in L1 starts to rise, when the pressure rises to the set switching pressure (this value can be changed by adjusting the pressure adjusting screw) PI, the grease overcomes the spring resistance, opens the valve, reaches the plunger P1 and pushes P1 to move, as Figure 6b shown.

[0147] The subsequent movement of the plungers P2 and P3 causes the oil pump to communicate L2, while at the same time de-pressurizing L1 (communicating L1 and R), at this time all the distributors are supplied by L2, when all the distributors complete a cycle of grease supply, the pressure in L2 starts to rise, when the pressure in L2 reaches the set pressure PI, a new cycle of switching begins, as Figure 6d shown, back to the position of Figure 6a .

[0148] This hydraulic switching structure is a case of use in other fields, where the core components are overflow valves and internal multiple plunger structures. In the lubrication pump of the present invention, this structure can also be used, so as to switch by hydraulic means. In other embodiments, the switching mechanism can also be directly driven by an external hydraulic system to switch, i.e. hydraulic switching.

[0149] As Figure 2As shown, when there is no grease in the grease can 3 during use, the low level alarm module will sound an alarm, prompting a replacement. The driver brings over a new can of grease and removes the dust cover from the grease can 3. At this time, the driver disconnects the clip 22 on the lid 21 of the lubrication pump 2 from the grease can 3, pulls the lubrication pump 2 out of the empty can, replaces the empty can with the new grease can 3, places the oil pressure plate of the pump seat 24 of the lubrication pump 2 into the new grease can 3, ensuring that its annular seal 25 is in a sealing sliding fit with the inner wall of the can, places the lid 21 on the grease can 3, and fastens it to the rim of the grease can 3 using its clip 22, completing the connection process. Lubrication can then be performed normally. The lubrication process operates as follows: After starting the lubrication pump 2, it operates according to the preset program in the controller 28. After the countdown ends, the motor begins to rotate forward. The motor output shaft 231, through the cooperation of the cam and the plunger pair mechanism, drives the plunger pair to draw in lubricating grease. The lubricating grease in the grease tank 3 enters from the grease inlet at the bottom of the pump seat 24, and then exits from line A. Subsequently, it is supplied to the lubrication points of the excavator 1, such as the boom root, stick, cylinder, and connecting rod 11, through the dual-line distributor 5 and the progressive distributor 6. After each plunger is in position, the oil returns to the oil tank via line B. After the set time is reached, the controller 28 controls the motor to reverse. The actuating element 264 on the motor output shaft 231 drives the lever mechanism 263 to move, causing the mechanical reversing valve 26 to switch. At this time, oil is discharged from line B and oil is returned from line A. The working process is similar to that described above. After completing one working cycle, the controller 28 stops operating after completing the set number of working cycles and begins a countdown until the countdown ends and the next cycle begins.

[0150] When the distributor or pipeline of the lubrication system malfunctions, such as when the lubrication pipeline is damaged by an accidental impact from ore on site, the two-position three-way switching valve 7 on the main oil line B can be switched to connect with the automatic return oil reel. At the same time, the controller 28 controls the motor to keep reversing to ensure that oil is only supplied from the B oil line. The driver can then use the oil gun of the automatic return oil reel 4 to add grease to each lubrication point, achieving emergency lubrication in case of an emergency.

[0151] In this embodiment, the lubrication pump 2 further includes a pressure switch for detecting the oil pressure in the main oil circuit, so as to control the drive device to stop operating when the set pressure is reached. In other embodiments, the lubrication pump 2 includes a safety valve connected to the main oil circuit, or the lubrication pump 2 includes an overflow valve 30 connected to the main oil circuit. Any of the pressure switch, safety valve, and overflow valve 30 has the function of protecting the main oil circuit, preventing excessive pressure in the main oil circuit from damaging the oil pipe or causing fatal malfunctions such as damage to the lubrication pump 2, and controlling the oil pressure in the main oil circuit to not exceed the maximum safe pressure. The pressure switch can provide feedback to the controller to control the lubrication pump 2 to stop when there is overpressure, and the safety valve and overflow valve 30 can overflow when there is overpressure to prevent the oil pressure from continuing to increase.

[0152] In this embodiment, since the plunger assembly is prone to cavitation during suction, a manual venting device is provided in front of the grease inlet of the plunger assembly for venting.

[0153] Example 2 of the dual-line centralized lubrication system of the present invention: Figure 7 As shown, the difference from Embodiment 1 is that the two dual-line distributors 5 are connected in parallel, and the lubrication pump 2 uses a two-position four-way solenoid valve as the reversing valve, replacing the mechanical reversing valve. Simultaneously, one of the main oil lines is disconnected, and quick-connect oil pipes are installed for connection. Quick-connect oil pipes are also installed on the automatic return oil reel 4. During normal lubrication, the quick-connect oil pipes on the main oil line connect with the quick-connect oil pipes on the pipeline before the distributor, allowing normal lubrication using the lubrication system formed by the distributor and pipeline. When the distributor or pipeline malfunctions and cannot lubricate normally, the quick-connect oil pipes on the main oil line of the lubrication pump 2 connect with the quick-connect oil pipes on the automatic return oil reel 4, and the controller controls the motor to rotate in one direction so that only the main oil line with the quick-connect oil pipes outputs oil. In this case, the lubrication pump 2 functions similarly to a traditional refueling machine, temporarily adding grease to lubrication points that urgently need lubrication, thus preventing equipment failure.

[0154] Example 3 of the dual-line centralized lubrication system of the present invention: Figure 8 As shown, the difference from Embodiment 2 is that three series-connected dual-line distributors 5 are provided.

[0155] Example 4 of the dual-line centralized lubrication system of the present invention: Figure 9 As shown, the difference from Embodiment 1 is that the two main oil circuits A and B of the dual-line lubrication pump 2 are equipped with progressive distributors 6, and they are of a mother-child progressive structure. That is, the distributor is a progressive distributor 6, including two mother progressive distributors 6 and at least two child progressive distributors 6. The inlets of the two mother progressive distributors 6 are respectively connected to the first and second external grease ports, and at least one of the child progressive distributors 6 is connected to one of the outlets of the two mother progressive distributors 6.

[0156] Example 5 of the dual-line centralized lubrication system of the present invention: Figure 10The difference between the system shown and that of Example 1 is that the system comprises one double-line distributor 5 and two progressive distributors 6. The double-line distributor 5 has at least one double-line distributor unit, which has two first inlets 51 and a plurality of first outlets 52. The two first inlets 51 are respectively connected to the two main oil lines, and the plurality of first outlets 52 are respectively connected to the lubrication points in a certain area of the equipment or at least one of the plurality of first outlets 52 is connected to the lubrication points in a certain area of the equipment through the next-stage distributor, and the remaining first outlets 52 are connected to other lubrication points. The progressive distributor 6 has one or two, and in this embodiment, there are two, each having a second inlet 61 and a plurality of second outlets 62 connected to the lubrication points in another area of the equipment. When there is one progressive distributor 6, the second inlet 61 is connected to one of the A and B oil lines. When there are two progressive distributors 6, the respective second inlets 61 are connected to the A and B oil lines.

[0157] The double-line distributor 5 includes block type and sheet type, and its structure is prior art and will not be described in detail. However, whether it is sheet type or block type, generally, a plurality of double-line distributor units are combined for use in order to save space, that is, the double-line distributor 5 in the above formula is actually a distributor group composed of a plurality of double-line distributor units. Figure 1 Any adjacent double-line distributor units are connected in parallel to the main oil lines A and B, and each double-line distributor unit has basically the same principle, with the only difference being that the diameter of the plunger is adjusted according to the oil requirement of the lubrication points. For example, the oil requirement of one lubrication point is 1 unit, and the oil requirement of another lubrication point is 3 units, so the ratio of the cross-sectional areas of the plungers corresponding to the two lubrication points is 1:3. When the lubricating grease pumped by the lubricating pump enters the double-line distributor unit through one inlet, it first enters the left cavity of the reversing spool, which pushes the reversing spool to the right. The lubricating grease on the right side of the reversing spool flows out through another inlet to the main oil line B, thereby unloading. With the right movement of the reversing spool, the left cavity of the metering spool is connected to the left cavity of the reversing spool, and the right cavity of the metering spool is connected to the outlet. The pumped lubricating grease enters the left cavity of the metering spool, which pushes the metering spool to move to the right, and the lubricating grease in the right cavity of the metering spool is pressed to the lubrication point through the outlet, thereby completing the first-stage action.

[0158] After the distribution through the progressive distributor 6 and the set working time of the progressive distributor 6 is reached, the reduction motor in the lubricating pump is reversed, the lubricating grease is pumped out from the main oil way B, and the main oil way A is unloaded. The progressive distributor 6 has one oil inlet and multiple oil outlets, each two oil outlets correspond to an internal plunger and plunger cavity, and each plunger is driven by the lubricating grease to act alternately, so that each oil outlet alternately discharges oil. The progressive distributor 6 also includes two types of sheet and block. When the controller controls, the lubricating time of each main oil way can be controlled by controlling the reduction motor, that is, the lubricating time of the progressive distributor 6 is controlled. The longer the lubricating time of the progressive distributor 6, the larger the total displacement. Through the control of the time, the number of lubrication points required by the lubrication point can be adaptively adjusted. When the oil demand of the lubrication point changes, the lubricating time of the corresponding oil way can be adjusted. This feature makes it easy to adjust the working time of the progressive distributor 6 when the oil demand of the lubrication point changes due to changes in equipment working mode, changes in lubricating pipeline length, temperature changes or changes in equipment model. On the other hand, when the controller controls each main oil way to work, the total working time is not changed, and it can be divided into multiple working times, that is, the reduction motor can be started for a period of time and then stopped, and then started and stopped again. The lubricating grease is supplied in multiple times, and the lubricating grease is fully utilized by the lubrication point. The sum of the effective working time of multiple working times is equal to the designed total working time. Since the progressive distributor 6 is connected to the main oil way, taking the excavator as an example, the outlets of the double-line distributor 5 are connected to the lubrication points on the boom and the stick, and the outlets of the progressive distributor 6 are connected to the lubrication points of the drawbar and the connecting rod. Since the connecting rod and the drawbar are far away from the double-line lubricating pump, the corresponding pipeline is long and the pipe resistance is large. Under normal circumstances, the double-line distributor 5 works first, the lubricating grease of the double-line lubricating pump is pumped out from one of the A and B oil ways, first enters the reversing valve core of the double-line distributor 5, then enters the metering plunger, and then the lubricating grease in the metering cavity is pumped to the lubrication points of the boom and the stick through the corresponding outlet and pipeline. At the same time, the lubricating grease of the main oil way enters the progressive distributor 6, so that the outlets of the progressive distributor 6 alternately discharge the lubricating grease to pump the lubricating grease to the lubrication points of the drawbar and the connecting rod. Since the oil demand of the connecting rod and the drawbar is large, under the control of the controller, the progressive distributor 6 can work multiple strokes until the pumped lubricating grease meets the demand of the lubrication points of the connecting rod and the drawbar. Moreover, when different models are replaced, different working modes are replaced, in different temperatures and different pipeline lengths, the lubricating grease demand of the connecting rod or the drawbar area changes, and the working time of the progressive distributor 6 only needs to be adjusted by the controller. Moreover, the adjustment of the working time of the distributor is realized by different actions of the double-line lubricating pump, without the need for complex components such as solenoid valves.Subsequently, until the amount of grease of the progressive distributor 6 meets the requirement, the reversing valve mechanism is controlled to reverse, another main oil path grease is changed, and the spool in the double-line distributor 5 is reversed, so as to enter another cycle. As can be seen from the above working process, the grease of the double-line distributor 5 is distributed by relying on its own structure, and the grease of the progressive distributor 6 is distributed by relying on its own structure and controlled by the working time of the controller. In other words, the total amount of grease of the double-line distributor 5 is determined by the diameter of the spool itself, and the amount of grease of the progressive distributor 6 is no longer limited by the diameter of the spool itself, but is related to the working time and the diameter of the spool. For different lubrication points, only the working time of the progressive distributor 6 needs to be adjusted, without adjusting the spool structure of the progressive distributor 6 and without replacing the progressive distributor 6. This makes it possible to adapt to any type of construction machinery, regardless of the type of construction machinery, regardless of the working mode of the construction machinery, regardless of the temperature, the pipe length and the change of the oil requirement of each lubrication point. Only the double-line distributor 5 is used to supply grease to the area with the minimum oil requirement, and the progressive distributor 6 is used to supply grease to the area with the larger oil requirement. By adjusting the working time of the progressive distributor 6, the change of different oil requirements can be met, and the adaptability is greatly improved.

[0159] Embodiment 6 of the double-line centralized lubrication system of the present application: as Figure 11The difference between the embodiment 5 and the embodiment 6 is that the double-line distributor is not set any more, but a single-line distributor 70 is adopted, which has at least one first inlet 71 and a plurality of first outlets 72. When the single-line distributor 70 is one, it is connected with one of the A and B oil lines through the first inlet 71. When the single-line distributor 70 is at least two, it is connected with at least one of the A and B oil lines through the respective first inlets 71. The plurality of first outlets 72 are respectively connected with the lubrication points in a certain area of the equipment, or at least one of the plurality of first outlets 72 is connected with the lubrication points in a certain area of the equipment through a next-stage distributor, and the rest of the first outlets 72 are connected with other lubrication points. The progressive distributor 6 is one or two, which has a second inlet 61 and a plurality of second outlets 62 connected with the lubrication points in another area of the equipment. When the progressive distributor 6 is one, it is connected with one of the A and B oil lines through the second inlet 61. When the progressive distributor 6 is two, it is connected with the A and B oil lines through the respective second inlets 61. The structure of the single-line distributor 70 is a prior art, and will not be described in detail. Generally, in order to save the volume, a plurality of single-line distribution units are combined for use, that is, the single-line distributor 70 is actually a distributor group composed of a plurality of single-line distribution units. Any adjacent single-line distribution unit is connected in parallel with the main oil line A or B, and the principle of each single-line distribution unit is basically the same, and the only difference is that the diameter of the plunger is adjusted according to the oil requirement of the lubrication points. For example, the oil requirement of one lubrication point is one unit, and the oil requirement of another lubrication point is three units, so the ratio of the cross-sectional area of the plungers corresponding to the two lubrication points is 1:3. In operation, the oil inlets are connected with the main oil lines A and B. When the double-line lubricating pump is pumping, the high-pressure lubricating grease in the main oil line A enters the single-line distributor 70, the lubricating grease enters the valve body cavity connected with the main oil line, the lubricating grease first passes through the oil inlet, then extrudes the umbrella-shaped valve core to be located at the second valve position, blocks the core hole, and then enters the oil pressing cavity through the oil changing channel. The lubricating grease then pushes the piston up and compresses the spring, the volume of the oil pressing cavity becomes larger, the volume of the oil storage cavity becomes smaller, and the lubricating grease stored in the oil storage cavity in the last working cycle is extruded and discharged from the oil discharge port. The lubricating grease flows to the corresponding lubrication point through the oil pipe leading to the lubrication point, and the lubricating process is completed. Then, after the double-line lubricating pump stops, the main oil line A stops pressurizing, the piston is pushed down by the spring, the volume of the oil storage cavity becomes larger, the volume of the oil pressing cavity becomes smaller, the lubricating grease in the oil pressing cavity enters the valve body cavity through the oil changing channel and pushes the umbrella-shaped edge of the valve core to the right, opens the core hole, and the lubricating grease enters the oil storage cavity with a larger volume through the core hole and the bypass oil channel, and the oil storage process is completed. Then, after the distribution of the progressive distributor 6 and the lubricating pump reaches the set working time of the progressive distributor 6, the lubricating pump is reversed, the lubricating grease is pumped out from the main oil line B, and the main oil line A is unloaded and returns to oil.

[0160] Embodiment 7 of the double-line centralized lubrication system of the present application: as shown in Figure 12 different from embodiment 5 is that a split oil switch valve is arranged between the second double-line distributor 5 and the progressive distributor 6 downstream of the second double-line distributor 5 on the main oil line B, the split oil switch valve is a two-position three-way electromagnetic valve 7 (i.e. a two-position three-way switch valve), the split oil switch valve has one inlet oil line and two outlet oil lines, one of the outlet oil lines is communicated with the inlet of the progressive distributor 6 downstream, and the other outlet oil line is provided with a quick oil pipe joint 10 at the end thereof for docking with the quick oil pipe joint 10 on the reserved lubrication pipe of the breaking hammer. In use, the main oil line B can be controlled to be communicated with the progressive distributor 6 or the breaking hammer 9 through the split oil switch valve, for example, the main oil line B can be controlled to be communicated with the progressive distributor 6 through the split oil switch valve first to supply the lubricating grease to the lubrication points on the connecting rod, and then switched to be communicated with the breaking hammer when the lubricating grease on the connecting rod reaches the required amount, until the required amount of lubricating grease for the breaking hammer is reached. In other embodiments, the split oil switch valve can also be replaced by two on-off valves, each of which corresponds to one outlet oil line. Of course, if three outlet oil lines are required, the split oil switch valve here can be a three-position four-way valve or three on-off valves. The switching mode of the split oil switch valve or the on-off mode of the on-off valve can be manual, electric or program-controlled. Of course, a split oil switch valve or an on-off valve can also be arranged on the main oil line A.

[0161] Embodiment 8 of the double-line centralized lubrication system of the present application: as shown in Figure 13 different from embodiment 6 is that a single-line distributor 70 and a progressive distributor 6 are arranged on the main oil lines A and B respectively, and a split oil switch valve or an on-off valve is arranged between the single-line distributor 70 and the progressive distributor 6 on the main oil line B.

[0162] Embodiment 9 of the double-line centralized lubrication system of the present application: different from embodiment 1 is the structure of the lubrication pump, as shown in Figures 14-17 the lubrication pump comprises a pumping mechanism 2, a guide sliding sleeve 3, a barrel cover 4 and an elastic adapter hose 5.

[0163] The pumping mechanism 2 comprises a pump seat 21, a plunger pair and inlet and outlet grease ports arranged on the plunger pair, the outlet grease port 22 is arranged on the upper part of the pump seat 21; the pump seat 21 is disc-shaped and the outer edge is circular. A plunger cavity is arranged on the pump seat 21, the plunger cavity is provided with a plunger pair, and further comprises a driving mechanism for driving the plunger pair to act, the driving mechanism is a reduction motor or the like. The inlet oil port of the plunger cavity is arranged at the lower surface of the pump seat 21 for directly contacting the lubricating grease in the lubricating grease barrel 1 and pumping the lubricating grease, and the lower surface of the pump seat 21 is provided with an impeller mechanism for scraping and pressing the lubricating grease in the middle to improve the pumping capacity of the lubricating grease.

[0164] The guiding sliding sleeve 3 is used for guiding the up and down movement of the pumping mechanism 2, and comprises at least two sliding sleeve segments sleeved with each other, the innermost sliding sleeve segment is used for fixed connection with the speed reducer 23 of the pumping mechanism 2, and the outermost sliding sleeve segment is used for fixed connection with the barrel cover 4 or is overlapped in an axial stop cooperation mode.

[0165] The barrel cover 4 is used for detachable connection with the opening of the lubricating grease barrel 1, the pumping mechanism 2 is suspended in the center of the barrel cover 4 through the guiding sliding sleeve 3, the pumping mechanism 2 has an upper limit position and a lower limit position when moving in the up and down direction, the barrel cover 4 has an annular cavity 41 with an open lower end, an inner recessed joint avoiding groove is arranged on the top side of the barrel cover 4, a mounting hole penetrating through the outside and the annular cavity 41 is formed on the joint avoiding groove, an oil pipe joint 42 is fixedly installed in the mounting hole, and a sealing structure such as sealing glue, a sealing rubber ring or the like is arranged between the oil pipe joint 42 and the hole wall of the mounting hole. One end of the oil pipe joint 42 is located in the annular cavity 41, and the other end is located outside the barrel cover 4. The barrel cover 4 comprises two layers of sleeve pipes, the upper ends of the two layers of sleeve pipes are integrally connected through an annular plate, the lower ends of the two layers of sleeve pipes have annular openings, the space between the two layers of sleeve pipes is the annular cavity 41, and the upper opening of the barrel cover 4 forms a lifting hole 44. A protective cover 45 is arranged on the sealing cover of the lifting hole 44, so as to prevent dust and rain from entering the barrel cover 4 or the pump seat 21 from the lifting hole 44. The material of the barrel cover 4 can be plastic or metal.

[0166] The elastic adapter hose 5 is located in the annular cavity 41 of the barrel cover 4, the elastic adapter hose 5 is a flexible rubber pipe or a plastic pipe, and needs to meet the characteristics of bending resistance and pressure resistance. One end of the elastic adapter hose 5 is connected with the oil pipe joint 42, and the other end is connected with the grease outlet 22 through an outlet joint. In the embodiment, the oil pipe joint 42 and the outlet joint are both hinged joints, so that when the elastic adapter hose 5 is stretched or deformed, the rotation of the hinged joint can compensate for the torsion. The length of the elastic adapter hose 5 is greater than the distance between the grease outlet 22 and the oil pipe joint 42 at the lower limit position, and when the pumping mechanism 2 is at the lower limit position, the elastic adapter hose 5 is in the maximum stretching state. In fact, the length of the elastic adapter hose 5 is relatively long, and the two ends are fixed on the oil pipe joint 42 of the barrel cover 4 and the grease outlet 22 of the pump seat 21 respectively. When the pump seat 21 and the barrel cover 4 move up and down relative to each other, the elastic adapter hose 5 can be stretched or bent in the annular cavity 41, and generally forms a C shape when bent. The elastic adapter hose is always in a bent state in the annular cavity, and when the pump head is close to the barrel cover, the elastic adapter hose can be bent towards a certain bending direction.

[0167] In the embodiment, the guiding sliding sleeve 3 comprises at least two sliding sleeve segments, the innermost sliding sleeve segment has a top plate 311, a lifting handle 32 is arranged on the top plate 311, the central part of the barrel cover 4 corresponds to the guiding sliding sleeve 3 and is provided with a lifting hole 44 for passing through the lifting handle 32 to operate, and a protective cover 45 is detachably arranged on the lifting hole 44.

[0168] In the embodiment, the pumping mechanism 2 comprises a speed reducer motor 23, the bucket cover 4 is provided with a monitor 43 or a control switch, the control switch can be a mechanical switch or a remote control switch, a transition wire 6 is wound in the space between the guide sliding sleeve 3 and the protective cover 45, one end of the transition wire 6 penetrates through the innermost sliding sleeve segment and is connected with the speed reducer motor 23, the other end penetrates through the outermost guide sliding sleeve 3 and is connected with the monitor 43, the length of the transition wire 6 is greater than the distance between the speed reducer motor 23 and the monitor 43 at the lower limit position, and the transition wire 6 is in the maximum stretched state when the pumping mechanism 2 is at the lower limit position. A spiral spring sleeve is sleeved outside the transition wire 6 to make the transition wire 6 tightly adhere to the inner wall of the outermost sliding sleeve segment.

[0169] In the embodiment, the grease outlet 22 has two, the elastic transition hose 5 has two, and the oil pipe joint 42 has two, and the two elastic transition hoses 5 and the corresponding two oil pipe joints 42 are symmetrically arranged.

[0170] In the embodiment, the handle 32 comprises a fixed part 321 and a movable part 322 which are slidably connected with each other, the fixed part 321 is fixed relative to the innermost sliding sleeve segment, and the movable part 322 is located below the fixed part 321, the handle 32 is first lifted to drive the movable part 322 to move upward to abut against the fixed part 321 and then drive the fixed part 321 to move upward, an elastic sealing member 24 for sealingly cooperating with the inner wall of the lubricating grease bucket 1 is sleeved on the outer circular ring of the upper connection of the outer edge of the pump base 21, a gas hole penetrating through the pump base 21 and / or the elastic sealing member 24 in the up-down direction is arranged, a valve 25 is arranged on the gas hole to block the gas hole, a pull rope 26 is connected to the valve 25, and the upper end of the pull rope 26 is fixed to the movable part 322, the pull rope 26 is in a taut state, and the movable part 322 can open the valve 25 through the pull rope 26 when the handle 32 is pulled upward. The valve can be a one-way valve. The pull rope can be a steel wire brake line, which comprises a flexible sleeve and a steel wire line moving in the flexible sleeve.

[0171] In the embodiment, a limiting groove for limiting and guiding the pull rope 26 is further arranged on the shell of the speed reducer motor 23.

[0172] In other embodiments, the shape of the fixed part 321 is no longer U-shaped, but only comprises two parallel and vertically arranged metal sheets, and a long hole is arranged on each metal sheet, and the two ends of the sliding rod on the movable part 322 are respectively inserted into the long holes of the two metal sheets.

[0173] In other embodiments, the handle 32 is U-shaped and is hinged to the upper part of the shell of the speed reducer motor 23 through a hinge shaft, the hinge shaft is horizontally arranged, the handle 32 can rotate around the hinge shaft, the pull rope 26 connected to the upper part of the handle 32 can be lifted upward when the handle 32 is rotated upward, and the handle 32 automatically flips downward to adhere to the shell of the speed reducer motor 23 when not in use.

[0174] In other embodiments, the oil pipe joint 42 can also be arranged above the barrel cover 4, but is preferably embedded to reduce the height of the barrel cover 4.

[0175] In other embodiments, the annular cavity 41 can also be formed by the barrel cover 4 and the outermost guide sleeve 3.

[0176] It should be noted that the elastic adapter hose 5 in the embodiment is bent in the annular cavity 41 to form a three-dimensional U-shaped structure, i.e., the projection in the vertical plane is U-shaped or C-shaped, and the projection in the horizontal plane is also U-shaped or C-shaped.

[0177] Embodiment 10 of the double-line centralized lubrication system of the application: as shown in Figure 18 The difference from embodiment 5 is that the progressive distributor is no longer arranged, but an independent lubricating oil line K is connected to each of the two main oil lines A and B, and a one-way valve 8 for adjusting the oil line pressure is arranged on the independent lubricating oil line K, which can be replaced by a back pressure valve, a throttle valve, etc. in other embodiments. In operation, the grease output of the double-line distributor 5 is fixed per cycle, and the grease output of the independent lubricating oil line K is proportional to the lubricating pump 2 working time.

[0178] Embodiment 11 of the double-line centralized lubrication system of the application: as shown in Figure 19 The difference from embodiment 6 is that the progressive distributor is no longer arranged, but an independent lubricating oil line K is connected to one of the two main oil lines 2. At this time, the grease output of the single-line distributor 3 is fixed per cycle when the main oil line 2 is working, and the grease output of the independent lubricating oil line K is proportional to the lubricating pump 1 working time. In order to ensure that the single-line distributor 3 can be smoothly reversed and the lubricating grease can be smoothly discharged from the grease outlet to each corresponding lubrication point, a one-way valve 4 for adjusting the oil line pressure is arranged on the independent lubricating oil line K, which can be replaced by a back pressure valve, a throttle valve, etc. in other embodiments. In other embodiments, only one of the two main oil lines can be provided with a single-line distributor, and the other can be directly connected to an independent lubricating oil line. Both of the two main oil lines can be connected to a single-line distributor, and both of the two main oil lines can be connected to an independent lubricating oil line.

[0179] The lubricating pump of the application has the same structure as the lubricating pump in the double-line centralized lubrication system described above, and will not be described again.

Claims

1. A lubrication pump, characterized in that, include: A lid is used to detachably connect to a grease container, allowing the grease container to be replaced by removing or installing the lid. Drive unit; The pumping mechanism includes a pump base and a plunger assembly mounted on the pump base and driven by a drive unit. The plunger assembly has a grease outlet for discharging grease and a grease inlet for drawing grease from a grease container. The pump base is also provided with an annular seal for sliding and sealing with the inner wall of the grease container. The drive unit is fixed relative to the pump base. A directional valve mechanism includes a directional valve and a directional module. The directional valve includes at least four ports, including a grease inlet port communicating with the grease outlet of a plunger assembly, a grease return port communicating with a grease tank, and first and second external grease ports. The directional valve is controlled by the directional module so that when grease is discharged from the first external grease port and grease is returned from the second external grease port, the first external grease port is connected to the grease inlet port via the directional valve, and the second external grease port is connected to the grease return port via the directional valve; when grease is returned from the first external grease port and grease is discharged from the second external grease port, the first external grease port is connected to the grease return port via the directional valve, and the second external grease port is connected to the grease inlet port via the directional valve. The guide sleeve, with its upper end connected to the barrel lid, serves as a guide for the pumping mechanism to move relative to the barrel lid, thereby limiting its movement along the central axis of the grease barrel. The guide sleeve includes at least two sleeve segments that slide and extend with each other along the central axis of the grease barrel. The innermost sleeve segment is fixedly connected to the pumping mechanism, and the outermost sleeve segment is fixedly connected to the barrel lid. The grease outlet is located on the upper part of the pump base. The pumping mechanism has upper and lower limit positions when it moves in the vertical direction. The barrel cover has an annular cavity with an opening at the lower end, or the barrel cover and the guide sleeve form an annular cavity with an opening at the lower end. The barrel cover is provided with an oil pipe connector. One end of the oil pipe connector is located inside the annular cavity and the other end is located outside the barrel cover. An elastic adapter hose is provided inside the annular cavity. The upper end of the elastic adapter hose is connected to the oil pipe connector and the lower end is connected to the grease outlet. When the pumping mechanism is in the lower limit position, the elastic adapter hose is in the minimum bending state. When the pumping mechanism is in the upper limit position, the elastic adapter hose is in the maximum bending state. The elastic adapter hose extends along the circumference of the annular cavity to a distance less than one circumference of the annular cavity and then turns back in the opposite direction. The upper part of the drive device is fixed with a handle, and the center of the bucket lid is provided with a lifting hole corresponding to the handle, so as to allow the handle to be lifted through the lifting hole. The lifting hole is provided with a protective cover. The handle includes a fixed part fixed relative to the geared motor and a movable part slidably mounted on the fixed part in the vertical direction. The fixed part is provided with a stop structure that cooperates with the movable part to limit the movement stroke of the movable part when it moves upward. When the handle is lifted, the movable part is first moved upward to cooperate with the stop structure, and then the fixed part is moved upward. The pump seat and / or the annular seal is provided with a vertically penetrating air hole. The air hole is sealed with a valve. A pull rope is connected to the valve. The upper end of the pull rope is fixed to the movable part. The pull rope is in a taut state. When the handle is pulled up, the movable part can open the valve through the pull rope. The lubrication pump also includes a compression spring mounted on the barrel cover or guide sleeve to provide a downward elastic compressive force to the pumping mechanism.

2. The lubrication pump according to claim 1, characterized in that, At least one of the pipelines between the first external grease inlet, the second external grease inlet, the grease outlet, and the grease inlet is connected to a pump seat quick connector or a three-way switching valve.

3. The lubrication pump according to claim 1, characterized in that, The driving device is a geared motor, and the reversing module is a mechanical reversing mechanism driven by the output shaft of the geared motor. The mechanical reversing mechanism includes a lever mechanism and a toggle member. The reversing valve includes a valve core. The switching action of the valve core between various valve positions is driven by the swinging action of the lever mechanism. The toggle member is mounted on the output shaft of the geared motor to rotate with the output shaft. When the output shaft of the geared motor rotates in the forward direction, the toggle member moves the lever mechanism in the forward direction, causing the lever mechanism to swing in the forward direction, thereby placing the reversing valve in one valve position. When the output shaft of the geared motor rotates in the reverse direction, the toggle member moves the lever mechanism in the reverse direction, causing the lever mechanism to swing in the reverse direction, thereby placing the reversing valve in another valve position. At least one of the lever mechanism and the toggle member is an elastic structure. When the output shaft rotates in the forward or reverse direction, the toggle member contacts the lever mechanism and drives the valve core to move. When the valve core switches to the corresponding valve position, the elastic deformation of the elastic structure causes the toggle member and the lever mechanism to slide relative to each other.

4. The lubrication pump according to claim 1, characterized in that, The driving device is a geared motor, and the reversing module is a mechanical reversing mechanism driven by the output shaft of the geared motor. The mechanical reversing mechanism includes a lever mechanism and a toggle member. The reversing valve includes a valve core. The switching action of the valve core between various valve positions is driven by the swinging action of the lever mechanism. The toggle member is installed on the output shaft of the geared motor to rotate with the output shaft. When the output shaft of the geared motor rotates in the forward direction, the toggle member moves the lever mechanism in the forward direction, causing the lever mechanism to swing in the forward direction, thereby placing the reversing valve in one valve position. When the output shaft of the geared motor rotates in the reverse direction, the toggle member moves the lever mechanism in the reverse direction, causing the lever mechanism to swing in the reverse direction, thereby placing the reversing valve in another valve position. The pump base is provided with elastic structures on both sides of the lever mechanism. When the output shaft rotates in the forward or reverse direction, the toggle member contacts the lever mechanism and drives the valve core to move. The elastic structure is compressed. When the valve core switches to the corresponding valve position, the toggle member and the lever mechanism slide relative to each other, and the elastic structure provides elastic force to the lever mechanism to reset it.

5. The lubrication pump according to claim 1, characterized in that, The driving device is a geared motor, the reversing valve includes a valve core, and the reversing module is a mechanical reversing mechanism driven by the output shaft of the geared motor. The mechanical reversing mechanism includes a driving wheel and a driven wheel driven by the driving wheel, and also includes an arc guide structure to guide the driven wheel so that while the driving wheel drives the driven wheel to rotate, the driven wheel can revolve around the rotation axis of the driving wheel along the arc guide structure. It also includes a driven wheel valve core transmission structure so that the driven wheel drives the valve core to move linearly when it revolves around the rotation axis of the driving wheel. The reversing of the reversing valve is achieved by controlling the geared motor to change the rotation direction of the driving wheel. It also includes a stop structure to stop the driven wheel after it has moved to the position along the arc guide structure.

6. The lubrication pump according to claim 1, characterized in that, The reversing valve includes a valve core, and the reversing module includes an electromagnet. The switching action of the valve core between different valve positions is driven by the electromagnet. The electromagnet is energized and de-energized to change the valve position of the reversing valve.

7. The lubrication pump according to claim 1, characterized in that, The reversing module includes an overflow valve installed on the reversing valve, and the reversing module controls the reversing valve through the overflow valve.

8. The lubrication pump according to claim 1, characterized in that, The lubrication pump also includes a controller for controlling the start, stop, and speed adjustment of the drive device according to the set control logic. The controller has a human-machine interface module to facilitate the adjustment of the lubrication pump parameters according to different working conditions.

9. The lubrication pump according to claim 1, characterized in that, An oil pressure switch, overflow valve, safety valve, or oil pressure sensor is installed on the oil line between the grease outlet and the grease inlet or on the main oil line.

10. The lubrication pump according to claim 1, characterized in that, The drive unit is a geared motor. Above the geared motor, in the space between the guide sleeve and the protective cover, there is a transfer wire coiled. The lower end of the transfer wire is connected to the geared motor, and the upper end is fixed relative to the barrel cover. When the pumping mechanism is in the lower limit position, the transfer wire is in the maximum extended state. When the pumping mechanism is in the upper limit position, the transfer wire is in the coiled state.

11. The lubrication pump according to claim 1, characterized in that, The handle includes a fixed part fixed relative to the geared motor and a movable part slidably mounted on the fixed part in the vertical direction. The fixed part is provided with a stop structure that cooperates with the movable part to limit the upward movement of the movable part. When the handle is lifted, the movable part is first moved upward until it cooperates with the stop structure, and then the fixed part is moved upward. A sealing assembly is provided on the outer edge of the pump base for sliding and sealing with the inner wall of the grease tank. The sealing assembly includes: A rigid ring is used to be sleeved on the outer periphery of the pump base so as to guide and slide with the outer periphery of the pump base along the central axis. The rigid ring is provided with a stop structure to limit the upward stroke of the pump base. The rigid ring can be moved by the stop structure when the pump base is lifted. The flexible ring plate has its inner side, near the central axis, connected to the rigid ring, and its outer edge is used for sliding and sealing with the inner wall of the grease tank. An elastic sealing ring, connected to a rigid ring and / or a flexible ring plate, is located inside the rigid ring and / or the flexible ring plate to seal the annular gap formed by the flexible ring plate and the outer surface of the pump base when the pump base is pressed down, which allows air to pass through the upper and lower sides of the flexible ring plate. During the up-and-down movement of the rigid ring relative to the pump base, it has a sealing position that seals the annular gap between the flexible ring plate and the pump base, and a disengaging position that releases the seal from the annular gap between the flexible ring plate and the pump base; when the rigid ring moves from the disengaging position to the sealing position, the elastic sealing ring is pressed against the pump base to seal the annular gap; when the rigid ring moves from the sealing position to the disengaging position, the elastic sealing ring disengages from the pump base to allow air to pass through the annular gap. The movable part is connected to a pull rope, the other end of which is connected to a rigid ring. The pump base is provided with a protruding winding post. The connection point between the pull rope and the rigid ring is located above the winding post. The pull rope is wound around the winding post and is in a taut state. When the handle is pulled up, the movable part can drive the rigid ring to move down relative to the pump base through the pull rope so that air can be conducted through the annular gap.

12. A dual-line centralized lubrication system, comprising a lubrication pump, a distributor, and pipelines, characterized in that, The lubrication pump is the lubrication pump as described in any one of claims 1-11.

13. The dual-line centralized lubrication system according to claim 12, characterized in that, One of the first and second external grease inlets is connected to a pump seat quick connector, and also includes a grease reel. The grease reel includes a reel support and a wound grease tube. One end of the grease tube is provided with a reel quick connector that can be plugged into the pump seat quick connector, and the other end of the grease tube is provided with a grease gun that can be plugged into the grease nipple at the lubrication point. One of the distributor inlets is connected to a distributor quick connector that can be plugged into the pump seat quick connector. The pump seat quick connector can be selectively connected to either the distributor quick connector or the reel quick connector.

14. The dual-line centralized lubrication system according to claim 12, characterized in that, It also includes a grease reel, which includes a reel support and a wound grease tube. One of the first and second external grease ports is connected to a three-way switching valve. The other two ports of the three-way switching valve are respectively connected to one of the inlets of the distributor and the grease tube. The other end of the grease tube is equipped with a grease gun that can be inserted and mated with a grease nipple at the point to be lubricated. The three-way switching valve allows one of the first and second external grease ports to be selectively connected to one of the grease tube and the distributor.

15. The dual-line centralized lubrication system according to claim 12, characterized in that, The distributor is a dual-line distributor. The two inlets of the dual-line distributor are connected to the first and second external grease ports. At least one outlet of the dual-line distributor is connected to a progressive distributor. The outlet of the progressive distributor is connected to the lubrication point of the equipment to be lubricated through an oil pipe.

16. The dual-line centralized lubrication system according to claim 12, characterized in that, The distributor is a dual-line distributor, and there are at least two dual-line distributors, which are connected in parallel or in series.

17. The dual-line centralized lubrication system according to claim 12, characterized in that, The dispenser is a progressive dispenser, including two female progressive dispensers and at least two female progressive dispensers. The inlets of the two female progressive dispensers are respectively connected to the first and second external grease ports, and at least one of the female progressive dispensers is connected to one of the outlets of the two female progressive dispensers.

18. The dual-line centralized lubrication system according to claim 12, characterized in that, The dual-line centralized lubrication system also includes at least one grease suction device for extracting waste grease from the equipment.

19. The dual-line centralized lubrication system according to claim 12, characterized in that, The distributor includes a dual-line distributor and a progressive distributor. The pipeline includes a main oil circuit, which includes oil circuits A and B, respectively connected to the first and second external grease ports. There is at least one dual-line distributor, which has two first inlets and multiple first outlets. The two first inlets are respectively connected to the two main oil circuits, and the multiple first outlets are respectively used to connect to the lubrication points of a certain area on the equipment. Alternatively, at least one of the multiple first outlets is used to connect to the lubrication points of a certain area on the equipment through a next-level distributor, and the remaining first outlets are used to connect to other lubrication points. There is one or two progressive distributors, which have a second inlet and multiple second outlets for connecting to the lubrication points of another area on the equipment. When there is one progressive distributor, it is connected to one of the oil circuits A and B through the second inlet. When there are two progressive distributors, they are respectively connected to the oil circuits A and B through their respective second inlets.

20. The dual-line centralized lubrication system according to claim 12, characterized in that, The distributor includes a single-line distributor and a progressive distributor. The pipeline includes a main oil circuit, which includes oil circuits A and B respectively connected to the first and second external grease ports. There is at least one single-line distributor, which has a first inlet and multiple first outlets. When there is one single-line distributor, it is connected to one of the oil circuits A and B through the first inlet. When there are at least two single-line distributors, they are connected to at least one of the oil circuits A and B through their respective first inlets. The multiple first outlets are used to connect to each lubrication point in a certain area of ​​the equipment, or at least one of the multiple first outlets is used to connect to each lubrication point in a certain area of ​​the equipment through a next-level distributor, and the remaining first outlets are used to connect to other lubrication points. There is one or two progressive distributors, which have a second inlet and multiple second outlets for connecting to lubrication points in another area of ​​the equipment. When there is one progressive distributor, it is connected to one of the oil circuits A and B through the second inlet. When there are two progressive distributors, they are connected to the oil circuits A and B through their respective second inlets.

21. The dual-line centralized lubrication system according to claim 19 or 20, characterized in that, At least one of the oil circuits A and B is equipped with an oil distribution switching valve or at least two switching valves; the oil distribution switching valve has at least two oil outlet circuits, and the switching of each oil outlet circuit with the corresponding main oil circuit is realized through the oil distribution switching valve; each switching valve has one oil outlet circuit, and the switching of the oil outlet circuit with the corresponding main oil circuit is realized through the switching valve.

22. The dual-line centralized lubrication system according to claim 12, characterized in that, The distributor is a dual-line distributor. The pipeline includes a main oil circuit, which includes oil circuits A and B respectively connected to the first and second external grease ports. There is at least one dual-line distributor, having two first inlets and multiple first outlets. The two first inlets are respectively connected to two main oil circuits, and the multiple first outlets are used to connect to various lubrication points in a certain area of ​​the equipment via branch pipelines; or at least one of the multiple first outlets is used to connect to various lubrication points in a certain area of ​​the equipment via a next-level distributor, and the remaining first outlets are used to connect to other lubrication points. The dual-line distributor includes a reversing valve core. The pressure at the first inlet is greater than the reversing resistance of the reversing valve core, and the pressure at the first inlet is also greater than the friction resistance along each branch pipeline to the corresponding lubrication point. The pipeline also includes one or two independent lubrication oil circuits. When there is one independent lubrication oil circuit, one end of the independent lubrication oil circuit is connected to one of the two main oil circuits, and the other end is used to connect to the lubrication point in another area of ​​the equipment. When there are two independent lubrication oil circuits, the two independent lubrication oil circuits are respectively connected to the two main oil circuits, and the rear ends of the two independent lubrication oil circuits are respectively used to connect to the lubrication points in two other areas of the equipment. The grease output of the independent lubrication oil circuit is determined by the running time set by the lubrication pump.

23. The dual-line centralized lubrication system according to claim 12, characterized in that, The distributor is a single-line distributor. The pipeline includes a main oil circuit, which includes oil circuits A and B, respectively connected to the first and second external grease ports. There is at least one single-line distributor, which has a grease inlet and multiple grease outlets. The single-line distributor is connected to the main oil circuit through the grease inlet. The multiple grease outlets are used to connect to various lubrication points in a certain area of ​​the mechanical equipment to be lubricated through branch oil pipes, or at least one of the multiple grease outlets is used to connect to various lubrication points in a certain area of ​​the mechanical equipment to be lubricated through a next-level distributor, and the remaining grease outlets are used to connect to other lubrication points. The single-line distributor has a reversing plunger. The pressure of the grease inlet is greater than the reversing resistance of the reversing plunger, and the pressure of the grease inlet is also greater than the friction resistance of each branch oil pipe to the corresponding lubrication point. The pipeline also includes at least one independent lubrication oil circuit. One end of the independent lubrication oil circuit is connected to the main oil circuit, and the other end is used to connect to a lubrication point in another area of ​​the mechanical equipment to be lubricated. The grease output of the independent lubrication oil circuit is determined by the running time set by the lubrication pump.

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