Excavator link, link assembly, and excavator link lubrication system

Abstract

The present application relates to a excavator connecting rod, connecting rod assembly and excavator connecting rod lubricating system. The excavator connecting rod comprises: a main plate body, the upper and lower ends of which are respectively provided with hinge shaft sleeves, and the hinge shaft sleeves have lubricating points; the main plate body is provided with a distributor mounting structure for mounting the grease distributor on the main plate body; the plate internal flow channels are multiple, including oil outlet flow channels, and the outer ports of at least part of the oil outlet flow channels extend to the edge or the position close to the edge of the main plate body, for being communicated to the lubricating points of the hinge shaft sleeves; the inner ports of the plate internal flow channels are on the same side plate surface of the main plate body, and converge at the mounting area of the grease distributor, and after the grease distributor is mounted on the main plate body, the inner ports are communicated with the corresponding oil ports of the grease distributor. When the excavator connecting rod is used, the plate internal flow channels in the main plate body are communicated to the lubricating points to supply oil to the lubricating points, so that the excavator connecting rod has simple structure, beautiful appearance, and the oil circuit is not damaged, and the reliability of oil supply lubrication is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lubrication of construction machinery, in particular to a excavator connecting rod, a connecting rod assembly and a lubrication system for the excavator connecting rod. BACKGROUND

[0002] The excavator is a common engineering vehicle and is used in a large amount in infrastructure construction and plays a very important role. The reliability and stability of the bucket, which is the main working structure of the excavator, play a decisive role in the performance of the excavator. The bucket of the excavator is hinged at the front end of the excavator arm, and a connecting rod is also hinged on the bucket. The other end of the connecting rod is hinged with the oil cylinder through a hinge shaft. When the oil cylinder extends and retracts, the bucket swings relative to the excavator arm to realize the actions of scooping and dumping materials. Since the hinge parts at both ends of the connecting rod are in a harsh working environment, they are subjected to a large force during operation, and the bucket often needs to be shaken to completely dump the materials in the bucket. Therefore, it is often necessary to configure a lubrication system to lubricate the parts to ensure the smooth movement of the bucket.

[0003] The excavator connecting rods disclosed in the Chinese utility model patents with the publication numbers CN209653018U and CN207794165U are both provided with radial through oil nozzle sleeves on the hinge shaft sleeves at both ends of the connecting rod, and then connecting filling connectors on the oil nozzle sleeves to fill lubricating oil into the hinge shaft sleeves. The lubrication system of such excavators generally has grease dispensers fixedly installed on the inner or outer side surfaces of the connecting rod. The oil inlet of the grease dispenser is connected with the oil supply pipeline of the grease pumping system through a hose, and the oil outlet of the grease dispenser is connected with the filling connector through a hose. These matched hoses are often fixedly connected on the side surface of the connecting rod by pipe clamps. This makes a large number of oil pipes attached to the excavator connecting rod. In order to avoid damage to the grease dispensers and hoses on the connecting rod by soil or sand during filling and digging work, a protective plate substantially equal to the excavator connecting rod is often installed on the corresponding side surface of the connecting rod to shield the grease dispensers and hoses. Although this can protect the grease dispensers and oil pipes to some extent, there are still the following problems:

[0004] Firstly, the structure of the connecting rod position is relatively complex, and it is very inconvenient to disassemble and assemble, which affects the filling and digging work of the bucket to some extent; secondly, the size of the connecting rod is different for different models, so different specifications of the protective plate need to be manufactured, which cannot realize the universality of industrial production, and the design and manufacturing are very troublesome and the cost is high; thirdly, in order to ensure sufficient structural strength, the protective plate is generally connected with the connecting rod by welding, which needs to reserve welding points on the connecting rod, which not only makes the connecting rod processing more troublesome, but also increases the processing difficulty and workload of the protective plate; fourthly, the protective plate installed on the connecting rod makes one side of the connecting rod protrude, which is easy to be damaged or fall off when in use, and thus cannot guarantee the protection of the grease distributor and the hose, and the reliability is poor, which is greatly opposed by users and host factories.

[0005] In view of the above problems and difficulties, it is urgent to have a better method to completely solve the problems of large work load, high cost, poor universality, low installation efficiency, unreliability and poor appearance of the excavator connecting rod position lubrication system design, production and installation for a long time, which also causes the host factory and the user to be unwilling to install the connecting rod position lubrication, and the current centralized lubrication installation rate on excavators is less than 10%, which is mainly due to the above reasons, which seriously restricts the promotion and application of centralized lubrication in the excavator industry.

[0006] If these problems can be effectively and completely solved, most excavators can install and use the centralized lubrication system, which can greatly improve the service life of the equipment, reduce the labor intensity of the driver, save the amount of lubricating grease, reduce the harm of excessive oil falling to the ecological environment, and thus create more social and economic value. SUMMARY

[0007] The purpose of the present application is to provide an excavator connecting rod to solve the problems of inconvenient assembly and manufacturing and poor reliability of the existing excavator connecting rod when configuring a lubrication system; at the same time, the present application also provides a connecting rod assembly and an excavator connecting rod lubrication system comprising the above excavator connecting rod.

[0008] The excavator connecting rod of the present application comprises:

[0009] The main plate body is provided with hinge shaft sleeves at the upper and lower ends, and the hinge shaft sleeves have hinge shaft sleeve lubrication points;

[0010] The main plate body is provided with a distributor mounting structure for mounting the grease distributor on the main plate body;

[0011] The plate inner flow channel has a plurality of oil outlet flow channels, and the outer end of at least part of the oil outlet flow channels extends to the edge or the position close to the edge of the main plate body, and is used for connecting to the hinge shaft sleeve lubrication point;

[0012] The inner ports of the in-plate flow channels are on the same side surface of the main plate body and converge at the installation area of the grease distributor, and after the grease distributor is installed on the main plate body, the inner ports are in communication with the corresponding oil ports of the grease distributor.

[0013] The excavator connecting rod of the present application is used to fix the distributor on the excavator connecting rod, and then supply oil to the lubricating points through the in-plate flow channels inside the main plate body, which reduces or even avoids the need to additionally provide pipelines outside the main plate body, and avoids the need to provide a protective plate, thereby avoiding the troubles caused by manufacturing and welding the protective plate, and the excavator connecting rod has a simple structure and an attractive appearance, the oil circuit is not damaged, and the reliability of oil supply and lubrication is ensured.

[0014] Further, the in-plate flow channels are mainly formed by the inner holes formed in the main plate body and extending parallel to the plate surface, and the outer ports of the in-plate flow channels are on the side edges of the main plate body. By using the inner holes extending parallel to the plate surface as the main part of the flow channels, drilling holes on the side edges of the main plate body is convenient for processing. Moreover, the outer ports of the in-plate flow channels are on the side edges of the main plate body, which is convenient for leading to the lubricating points or externally connected oil pipes.

[0015] Further, the sleeve wall of the hinge shaft sleeve is provided with an oil passing hole leading from the outer surface of the hinge shaft sleeve to the lubricating point in the inner cavity of the hinge shaft sleeve, and an oil outlet flow channel is in communication with the oil passing hole and supplies oil to the lubricating point. The oil passing hole is directly connected and communicated with the oil outlet flow channel to lead the lubricating oil to the lubricating point, without the need to additionally provide a joint, thereby reducing the use of parts and simplifying the structure.

[0016] Further, the hinge shaft sleeve at the lower end of the main plate body is provided with at least one oil passing hole, and the hinge shaft sleeve at the upper end is provided with at least two oil passing holes arranged in an axial direction, and each oil passing hole corresponds to an oil outlet flow channel. In this way, the flow channels for supplying oil to the lubricating points at the hinge shaft sleeves at both ends of the main plate body are all inside the excavator connecting rod, the flow channel structure is not damaged, and the number and length of the oil pipes that need to be additionally provided outside the connecting rod are greatly reduced, thereby simplifying the structure of the excavator connecting rod.

[0017] Further, the hinge shaft sleeve at the upper end is provided with oil passing holes, each oil passing hole corresponds to an oil outlet flow channel, and the outer ports of the oil outlet flow channels leading to the hinge shaft sleeve at the upper end are in the distributor installation structure area and the area above the main plate body. When the excavator is used, the upper end of the excavator connecting rod is relatively far away from the earth material, and arranging the outer ports of the oil outlet flow channels in the distributor installation structure area or the area above the main plate body of the main plate body can to some extent avoid the problem that the grease pipeline is easily damaged when directly connected with the distributor, and the processing and assembly are more convenient.

[0018] So more simply and commonly, the outer port of the oil outlet flow channel of the hinge sleeve in communication with the upper end is located on the upper side of the main plate body, and the oil outlet flow channel of the hinge sleeve in communication with the upper end is formed by a through hole penetrating the main plate body. In this way, the through hole is directly formed on the main plate body to form the oil outlet flow channel, which is relatively simple to process, and the outer port of the oil outlet flow channel is arranged as high as possible, which is convenient for oil supply to the lubrication point of the hinge sleeve in the upper end.

[0019] In addition, the in-plate flow channel further comprises an oil inlet flow channel, and an inner port of the oil inlet flow channel is used for communication with an oil inlet of the grease distributor. In this way, the oil circuit required to be connected by the grease distributor is replaced by the in-plate flow channel, and the excavator connecting rod only needs to install the grease distributor on the surface of the main plate body during use, without the need for additional oil pipes and fixing structures for fixing the oil pipes, thereby greatly reducing the number of parts and making the appearance of the excavator connecting rod simple and beautiful.

[0020] Further, the outer port of the oil inlet flow channel is located in the distributor mounting structure region and the upper region of the main plate body. In this way, the outer port of the oil inlet flow channel can be arranged as high as possible, close to the excavator arm, and the length of the oil supply pipeline connected thereto can be reduced as much as possible, thereby facilitating connection with the oil supply pipeline.

[0021] Further, the outer port of the oil inlet flow channel is located on the upper side of the main plate body, and the oil inlet flow channel is formed by a through hole penetrating the main plate body. The outer port of the oil inlet flow channel is arranged on the upper side of the main plate body, which is close to the main machine of the excavator, so that the oil supply pipeline laid from the main machine of the excavator can be directly connected to the oil inlet flow channel, avoiding the winding of the oil supply pipeline at the excavator connecting rod and shortening the length of the oil supply pipeline.

[0022] As an optimized scheme, the main plate body is provided with an inspection hole corresponding to the in-plate flow channel, the inspection hole extends inward from the surface of the main plate body to communicate with the in-plate flow channel, and a plugging plug or an oil injection cup is arranged at the inspection hole. When the excavator is not used for a long time, the lubricating grease in the in-plate flow channel may dry and block the flow channel. The in-plate flow channel can be cleaned through the inspection hole to ensure the smoothness of the flow channel.

[0023] As another alternative scheme, the hinge sleeve is provided with an inspection hole corresponding to the oil outlet flow channel, the inspection hole penetrates the sleeve walls on both sides of the corresponding hinge sleeve, the inspection hole on the hinge sleeve is coaxially arranged with the corresponding oil outlet flow channel, and a plugging plug or an oil injection cup is arranged at the inspection hole. Since the hinge sleeve originally has a manual filling port for filling grease, and a grease nipple is arranged at the manual filling port, the original manual filling port is used as the inspection hole of the present scheme, which not only saves the trouble of additionally arranging the inspection hole, greatly reduces the labor intensity and processing cost, but also does not affect the structural strength of the connecting rod.

[0024] Furthermore, a bushing is coaxially interference-fitted inside the hinge bushing. The outer surface of the bushing has an annular groove with a bushing oil filling hole connecting the outer surface of the bushing to the inner cavity. The bushing oil filling hole is coaxially arranged with the inspection hole. Since the bushing itself is equipped with a bushing oil filling hole for manual grease filling, this section simply utilizes the original structure of the bushing. During installation, the bushing oil filling hole on the bushing is aligned coaxially with the manual filling port on the hinge bushing, making the manual filling port, the bushing oil filling hole, and the corresponding oil outlet channel coaxial. This facilitates the use of cleaning tools such as steel wire to clear sludge and dried grease blocking the oil outlet channel through the manual filling port, thus achieving the inspection function of clearing the channel.

[0025] Furthermore, the main body and the hinge sleeve are welded together. The outer port of the oil outlet channel extends to the mating surface between the main body and the hinge sleeve. An oil passage hole is formed on the sleeve wall, extending from the outer surface of the hinge sleeve to its inner cavity. The oil outlet channel communicates with the corresponding oil passage hole and supplies oil to the lubrication point. A sealing sleeve with its two ends extending into the oil passage hole and the oil outlet channel is installed at the mating position. The welded connection between the main body and the hinge sleeve allows for separate machining of the two components before welding, simplifying the process. The arrangement of the sealing sleeves reliably ensures the seal at the mating position of the oil passage hole and the oil outlet channel, improving the reliability of the excavator connecting rod.

[0026] Furthermore, the hinge bushing and the main body are integrally cast and machined. The internal flow channels include long oil channels extending along the length of the main body, which are formed by drilling. The long oil channels include the inspection hole and the oil outlet channel. The hinge bushing adopts a cast structure, which is stronger and more reliable than a welded structure. This is of great significance for the connecting rod, a major load-bearing component, and is more acceptable to customers. Moreover, it can avoid the problem of inconsistent weld quality caused by welding operation errors.

[0027] The linkage assembly of the present invention includes:

[0028] Excavator connecting rod;

[0029] Grease dispenser;

[0030] Excavator connecting rods include:

[0031] The main body has hinge sleeves at both the top and bottom ends, and the hinge sleeves have lubrication points inside the hinge sleeves.

[0032] The mainboard has a distributor mounting structure for mounting the grease distributor on the mainboard.

[0033] There are multiple flow channels inside the plate, including an oil outlet flow channel. At least part of the outer port of the oil outlet flow channel extends to the edge of the main plate or near the edge, for connecting to the lubrication point of the hinge sleeve.

[0034] The inner ports of the plate inner flow channels are on the same side plate surface of the main plate body and converge at the installation area of the grease distributor mounted on the main plate body of the excavator connecting rod, and the inner ports of the plate inner flow channels are communicated with the corresponding oil ports of the grease distributor.

[0035] The connecting rod assembly of the present application, in use, fixes the distributor on the excavator connecting rod, and then supplies oil to the lubrication points through the plate inner flow channels inside the main plate body to the lubrication points, which reduces or even avoids the need to additionally provide pipelines outside the main plate body, and avoids the need to provide a protective plate for protection, avoids the troubles caused by manufacturing and welding the protective plate, and the excavator connecting rod has a simple structure and an attractive appearance, the oil circuit is not damaged, and the reliability of oil supply and lubrication is ensured.

[0036] Further, the plate inner flow channels are mainly formed by the inner holes formed in the main plate body and extending parallel to the plate surface, and the outer ports of the plate inner flow channels are on the side edges of the main plate body. By using the inner holes extending parallel to the plate surface as the main part of the flow channel, drilling holes on the side edges of the main plate body is convenient for processing. Moreover, the outer ports of the plate inner flow channels are on the side edges of the main plate body, which is also convenient for leading to the lubrication points or externally connected oil pipes.

[0037] Further, the sleeve wall of the hinge shaft sleeve is provided with an oil passing hole leading from the outer surface of the hinge shaft sleeve to the lubrication point in the inner cavity of the hinge shaft sleeve, and an oil outlet flow channel is in communication with the oil passing hole and supplies oil to the lubrication point. The oil passing hole is directly connected and communicated with the oil outlet flow channel to lead the lubricating oil to the lubrication point, without the need to additionally provide a joint, reducing the use of parts and simplifying the structure.

[0038] Further, the hinge shaft sleeve at the lower end of the main plate body is provided with at least one oil passing hole, and the hinge shaft sleeve at the upper end is provided with at least two oil passing holes arranged in an axial direction, and each oil passing hole corresponds to an oil outlet flow channel. In this way, the flow channels for supplying oil to the lubrication points at the hinge shaft sleeves at both ends of the main plate body are all inside the excavator connecting rod, the flow channel structure will not be damaged, and the number and length of the oil pipes that need to be additionally provided outside the connecting rod are greatly reduced, and the structure of the excavator connecting rod is simplified.

[0039] Further, the hinge shaft sleeve at the upper end is provided with oil passing holes, each oil passing hole corresponds to an oil outlet flow channel, and the outer ports of the oil outlet flow channels communicating with the hinge shaft sleeve at the upper end are in the distributor installation structure area and the upper area of the main plate body. When the excavator is in use, the upper end of the excavator connecting rod is relatively far away from the earth material, and arranging the outer ports of the oil outlet flow channels in the distributor installation structure area or the upper area of the main plate body can to some extent avoid the problem that the oil pipe is easily damaged when directly connected with the distributor, and the processing and assembly are more convenient.

[0040] So more simply and commonly, the outer port of the oil outlet flow channel of the hinge shaft sleeve in communication with the upper end is located on the upper side of the main plate body, and the oil outlet flow channel of the hinge shaft sleeve in communication with the upper end is formed by a through hole penetrating the main plate body. In this way, the through hole is directly formed on the main plate body to form the oil outlet flow channel, which is relatively simple to process, and the outer port of the oil outlet flow channel is arranged as high as possible, which is convenient for oil supply to the lubrication point of the hinge shaft sleeve at the upper end.

[0041] In addition, the in-plate flow channel further comprises an oil inlet flow channel, and an inner port of the oil inlet flow channel is used for communication with an oil inlet of the grease distributor. In this way, the oil circuit required to be connected by the grease distributor is replaced by the in-plate flow channel, and when the excavator connecting rod is in use, only the grease distributor is installed on the surface of the main plate body, without the need for additional oil pipes and fixing structures for fixing the oil pipes, thereby greatly reducing the number of parts and making the appearance of the excavator connecting rod simple and beautiful.

[0042] Further, the outer port of the oil inlet flow channel is located in the distributor mounting structure region and the upper region of the main plate body. In this way, the outer port of the oil inlet flow channel can be arranged as high as possible, close to the excavator arm, and the length of the oil supply pipeline connected thereto can be reduced as much as possible, thereby facilitating connection with the oil supply pipeline.

[0043] Further, the outer port of the oil inlet flow channel is located on the upper side of the main plate body, and the oil inlet flow channel is formed by a through hole penetrating the main plate body. The outer port of the oil inlet flow channel is arranged on the upper side of the main plate body, which is close to the main machine of the excavator, so that the oil supply pipeline laid from the main machine of the excavator can be directly connected to the oil inlet flow channel, avoiding the winding of the oil supply pipeline at the excavator connecting rod and shortening the length of the oil supply pipeline.

[0044] As an optimized scheme, the main plate body is provided with an inspection hole corresponding to the in-plate flow channel, the inspection hole extends inward from the surface of the main plate body to communicate with the in-plate flow channel, and a plugging plug or an oil injection cup is arranged at the inspection hole. When the excavator is not used for a long time, the lubricating grease in the in-plate flow channel may dry and block the flow channel. The in-plate flow channel can be cleaned through the inspection hole to ensure the smoothness of the flow channel.

[0045] As another alternative scheme, an inspection hole is provided on the hinge shaft sleeve corresponding to the oil outlet flow channel, the inspection hole penetrates the sleeve walls on both sides of the corresponding hinge shaft sleeve, the inspection hole on the hinge shaft sleeve is coaxially arranged with the corresponding oil outlet flow channel, and a plugging plug or an oil injection cup is arranged at the inspection hole. Since the hinge shaft sleeve originally has a manual filling port for filling grease, and a grease nipple is arranged at the manual filling port, the original manual filling port is used as the inspection hole of the present scheme, which not only saves the trouble of additionally arranging the inspection hole, greatly reduces the labor intensity and processing cost, but also does not affect the structural strength of the connecting rod.

[0046] Further, the bushing is coaxially and tightly arranged in the hinge shaft sleeve, the outer surface of the bushing is provided with an annular groove, the annular groove is provided with a bushing oil injection hole which is communicated with the outer surface and the inner cavity of the bushing, and the bushing oil injection hole is coaxially arranged with the maintenance hole. Since the bushing itself needs to be provided with the bushing oil injection hole for use when manually injecting grease into the bushing, the original structure of the bushing is only utilized here, and only the bushing oil injection hole on the bushing is coaxially aligned with the manual injection port on the hinge shaft sleeve during installation, so that the manual injection port, the bushing oil injection hole and the corresponding oil outlet flow channel are coaxial, so as to facilitate the use of a steel wire or other cleaning tool to pass through the manual injection port to unblock the sludge and hardened grease blocked in the oil outlet flow channel, thereby realizing the maintenance function of unblocking the channel.

[0047] Further, the main plate body is welded to the hinge shaft sleeve, the outer end of the oil outlet flow channel extends to the abutting surface of the main plate body and the hinge shaft sleeve, the sleeve wall of the hinge shaft sleeve is provided with an oil passing hole which is punched from the outer surface of the hinge shaft sleeve to the inner cavity of the hinge shaft sleeve, the oil outlet flow channel is correspondingly communicated with the oil passing hole and supplies oil to the lubricating point, and the abutting position of the oil passing hole and the oil outlet flow channel is provided with a sealing sleeve which has two ends extending into the oil passing hole and the oil outlet flow channel. The main plate body and the hinge shaft sleeve are welded, the two parts can be machined respectively before welding, which is convenient, and the arrangement of the sealing sleeve can reliably ensure the sealing of the abutting position of the oil passing hole and the oil outlet flow channel, thereby improving the reliability of the excavator connecting rod.

[0048] Moreover, the connecting rod assembly further comprises a box-shaped protective cover which is sealingly buckled on the main plate body and covers the grease distributor inside. The arrangement of the box-shaped protective cover can avoid the direct collision of external objects with the grease distributor, better ensure the sealing fit between the grease distributor and the main plate body, and improve the reliability of the connecting rod assembly.

[0049] Further, the outer side of the box-shaped protective cover is further provided with lifting lugs, so as to facilitate the lifting and transportation of the connecting rod assembly.

[0050] Further, the hinge shaft sleeve and the main plate body are integrally cast and machined, and the plate inner flow channel comprises a long oil channel which extends along the length direction of the main plate body, the long oil channel is processed by drilling, and the long oil channel comprises the maintenance hole and the oil outlet flow channel. The hinge shaft sleeve adopts a cast structure, which is stronger and more safe and reliable than a welded structure, which is of great significance to the connecting rod which is a main force component and is more easily accepted by customers, and can also avoid the problem of inconsistent quality of welded parts due to welding operation errors.

[0051] The excavator connecting rod lubricating system of the present application comprises:

[0052] The grease pumping system comprises a lubricating pump, an oil supply pipeline and a grease distributor.

[0053] The excavator connecting rod lubricating system further comprises an excavator connecting rod, and the excavator connecting rod comprises:

[0054] The main plate body is provided with hinge shaft sleeves at its upper and lower ends, and the hinge shaft sleeves are provided with hinge shaft sleeve lubrication points;

[0055] The main plate body is provided with a distributor mounting structure for mounting the grease distributor on the main plate body;

[0056] The plate internal flow channels include oil outlet flow channels, and the outer ports of at least part of the oil outlet flow channels extend to the edges or edge-adjacent positions of the main plate body for communication with the hinge shaft sleeve lubrication points;

[0057] The inner ports of the plate internal flow channels are located on the same side plate surface of the main plate body and converge at the mounting area of the grease distributor mounted on the main plate body of the excavator connecting rod, and the inner ports of the plate internal flow channels are in communication with the corresponding oil ports of the grease distributor.

[0058] The excavator connecting rod lubricating system of the present application seals and fits the grease distributor on the excavator connecting rod, and then supplies oil to the lubrication points through the plate internal flow channels in the main plate body to the lubrication points, which reduces or even avoids the attachment of pipelines outside the main plate body, eliminates the need for using sealing joints and setting up protective plates for protection, avoids the troubles caused by manufacturing and welding the protective plates, and simplifies the structure of the excavator connecting rod, makes the appearance beautiful, and ensures the reliability of oil supply and lubrication.

[0059] Further, the plate internal flow channels are mainly formed by the inner holes parallel to the plate surface and extending in the main plate body, and the outer ports of the plate internal flow channels are located at the side edges of the main plate body. The inner holes parallel to the plate surface are used as the main part of the flow channels, and the drilling is performed at the side edges of the main plate body, which is convenient for processing. Moreover, the outer ports of the plate internal flow channels are located at the side edges of the main plate body, which is convenient for leading to the lubrication points or external oil pipes.

[0060] Further, the sleeve wall of the hinge shaft sleeve is provided with an oil passing hole leading from the outer surface of the hinge shaft sleeve to the lubrication point in the inner cavity of the hinge shaft sleeve, and the oil outlet flow channel is in communication with the oil passing hole and supplies oil to the lubrication point. The oil passing hole is directly connected and communicated with the oil outlet flow channel to lead the lubricating oil to the lubrication point, and no additional joint is needed, which reduces the use of parts and simplifies the structure.

[0061] Further, the hinge shaft sleeve at the lower end of the main plate body is provided with at least one oil passing hole, and the hinge shaft sleeve at the upper end is provided with at least two oil passing holes arranged in the axial direction, and each oil passing hole corresponds to an oil outlet flow channel. In this way, the flow channels for supplying oil to the lubrication points at the hinge shaft sleeves at both ends of the main plate body are located inside the excavator connecting rod, the flow channel structure will not be damaged, and the number and length of the oil pipes attached outside the connecting rod are greatly reduced, and the structure of the excavator connecting rod is simplified.

[0062] Further, the hinge sleeve of the upper end is provided with an oil passing hole, and each oil passing hole corresponds to an oil outlet flow channel, and the outer port of the oil outlet flow channel of the hinge sleeve of the upper end is located in the distributor mounting structure area and the upper area of the main plate body. When the excavator is in use, the upper end of the excavator connecting rod is relatively far away from the earth material, and arranging the outer port of the oil outlet flow channel in the distributor mounting structure area or the upper area of the main plate body can avoid the problem that the oil pipe is easily damaged when directly connected with the distributor, and the processing and assembly are more convenient.

[0063] Therefore, the outer port of the oil inlet flow channel is located in the upper side of the main plate body, and the oil inlet flow channel is formed by a through hole penetrating through the main plate body. In this way, the oil inlet flow channel is formed by directly opening a through hole on the main plate body, which is relatively simple to process, and the outer port of the oil inlet flow channel is arranged as high as possible, which is convenient for oil supply to the lubrication point of the hinge sleeve of the upper end.

[0064] In addition, the plate flow channel further includes an oil inlet flow channel, and the inner port of the oil inlet flow channel is used for communicating with the oil inlet port of the grease distributor. In this way, the oil line required to be connected by the grease distributor is replaced by the plate flow channel, and when the excavator connecting rod is in use, only the grease distributor is installed on the plate surface of the main plate body, without the need for additional oil pipe and fixing structure for fixing the oil pipe, which greatly reduces the number of parts and makes the appearance of the excavator connecting rod simple and beautiful.

[0065] Further, the outer port of the oil inlet flow channel is located in the distributor mounting structure area and the upper area of the main plate body. In this way, the outer port of the oil inlet flow channel can be arranged as high as possible, close to the excavator arm, and the length of the oil supply line connected therewith can be reduced as much as possible, which is convenient for connection with the oil supply line.

[0066] Further, the outer port of the oil inlet flow channel is located in the upper side of the main plate body, and the oil inlet flow channel is formed by a through hole penetrating through the main plate body. The outer port of the oil inlet flow channel is arranged on the upper side of the main plate body, which is close to the main machine of the excavator, so that the oil supply line arranged from the main machine of the excavator can be directly connected with the oil inlet flow channel, avoiding the winding of the oil supply line at the excavator connecting rod, and shortening the length of the oil supply line.

[0067] As an optimized scheme, the main plate body is provided with a maintenance hole corresponding to the plate flow channel, the maintenance hole extends inward from the surface of the main plate body to communicate with the plate flow channel, and the maintenance hole is provided with a plugging plug or an oil injection cup. When the excavator is not used for a long time, the lubricating grease in the plate flow channel may be dry and clogged to block the flow channel, and the plate flow channel can be cleaned through the maintenance hole to ensure the smoothness of the flow channel.

[0068] Further, the main plate body is welded with the hinge shaft sleeve, the outer port of the oil outlet flow channel extends to the abutting surface of the main plate body and the hinge shaft sleeve, the sleeve wall of the hinge shaft sleeve is provided with an oil passing hole passing through from the outer surface of the hinge shaft sleeve to the inner cavity of the hinge shaft sleeve, the oil passing hole and the oil outlet flow channel correspondingly communicate and supply oil to the lubricating point, and the abutting position of the oil passing hole and the oil outlet flow channel is provided with a sealing sleeve pipe with two ends respectively extending into the oil passing hole and the oil outlet flow channel. The main plate body and the hinge shaft sleeve are welded, the two parts can be respectively machined before welding, and the machining is convenient. The sealing sleeve pipe is arranged, the sealing of the abutting position of the oil passing hole and the oil outlet flow channel is reliably ensured, and the reliability of the excavator connecting rod is improved.

[0069] Moreover, the connecting rod assembly further comprises a box-shaped protective cover which is sealingly buckled on the main plate body and covers the grease distributor inside. The arrangement of the box-shaped protective cover can avoid direct collision of external objects with the grease distributor, better ensure the sealing fit between the grease distributor and the main plate body, and improve the reliability of the connecting rod assembly in use.

[0070] Further, the outer side of the box-shaped protective cover is further provided with an ear, so as to facilitate the hoisting and transportation of the connecting rod assembly.

[0071] Further, according to actual use needs, the grease distributor can be a progressive distributor or a double-line distributor or a single-line distributor.

[0072] Further, the hinge shaft sleeve at the upper end of the excavator connecting rod is hingedly connected with the oil cylinder ear ring, the oil cylinder ear ring is provided with an oil passing hole of the lubricating point passing through from the outer surface to the inner cavity, and the oil outlet flow channel in the main plate body is connected with the oil passing hole on the oil cylinder ear ring through a grease pipeline. In this way, the length of the external grease pipeline can be shortened as much as possible while the oil outlet flow channel is arranged conveniently, and the problem that the external grease pipeline is easily damaged due to being too long can be avoided as much as possible.

[0073] Alternatively, the hinge shaft sleeve at the upper end of the excavator connecting rod is hingedly connected with the oil cylinder ear ring through an upper hinge shaft, the first oil channel extending in the axial direction and the second oil channel extending in the radial direction in the upper hinge shaft lead to the lubricating point in the inner cavity of the oil cylinder ear ring, and the oil outlet flow channel in the main plate body is connected with the first oil channel through a grease pipeline. In this way, the length of the external grease pipeline can be shortened as much as possible while the oil outlet flow channel is arranged conveniently, and the problem that the external grease pipeline is easily damaged due to being too long can be avoided as much as possible.

[0074] Further, the hinge shaft sleeve is integrally cast with the main plate body, the plate internal flow channel includes a long oil channel extending along the length direction of the main plate body, the long oil channel is formed by drilling, and the long oil channel includes the maintenance hole and an oil outlet flow channel. The hinge shaft sleeve adopts a cast structure, and compared with a welded structure, the cast structure has higher strength and is safer and more reliable, which is of great significance for the connecting rod as a main force receiving component and is more easily accepted by customers, and the cast structure can also avoid the problem of inconsistent welding quality caused by welding operation errors. BRIEF DESCRIPTION OF DRAWINGS

[0075] Figure 1 A schematic view of an embodiment of the excavator connecting rod lubrication system of the present application used on an excavator;

[0076] Figure 2 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0077] Figure 3 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application; Figure 2 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0078] Figure 4 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application; Figure 2 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0079] Figure 5 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application; Figure 2 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0080] Figure 6 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application; Figure 2 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0081] Figure 7 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application; Figure 4 A cross-sectional view at a middle position;

[0082] Figure 8 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0083] Figure 9 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0084] Figure 10 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application; Figure 9 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0085] Figure 11 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application; Figure 9 A schematic view of the structure of an excavator connecting rod in an embodiment of the excavator connecting rod lubrication system of the present application;

[0086] Figure 12Structure diagram of the third excavator connecting rod;

[0087] Figure 13 Structure diagram of the third excavator connecting rod; Figure 12 Sectional view at the middle position;

[0088] Figure 14 Structure diagram of the fourth excavator connecting rod plate flow channel;

[0089] Figure 15 Structure diagram of the fifth excavator connecting rod plate flow channel;

[0090] Figure 16 Structure diagram showing the plate flow channel and the access hole;

[0091] Figure 17 Connection relationship diagram of the sixth excavator connecting rod and the corresponding telescopic cylinder hinge shaft sleeve;

[0092] Figure 18 Structure diagram of the seventh excavator connecting rod; Figure 17 Enlarged view of the middle Y;

[0093] Figure 19 Front view of the seventh excavator connecting rod;

[0094] Figure 20 Structure diagram of the seventh excavator connecting rod; Figure 19 Sectional view at the middle P-P;

[0095] Figure 21 Structure diagram of the seventh excavator connecting rod; Figure 20 Sectional view at the middle P-P;

[0096] Wherein;

[0097] Figure 1 In the drawings: 90-excavator arm; 91-bucket; 92-oil cylinder ear ring; 93-rocker; 97-oil supply pipeline; 99-lubricating pump; 1-excavator connecting rod;

[0098] Figures 2-21 In the drawings: 10-main plate body; 100-oil passing hole; 101-sealing sleeve; 11-telescopic cylinder hinge shaft sleeve; 12-bucket hinge shaft sleeve; 13-manual filling port; 2-grease distributor; 20-distributor mounting area; 3-oil inlet flow channel; 4-first type oil outlet flow channel; 40-first flow channel; 41-second flow channel; 43-access hole; 400-plugging plug; 5-second type oil outlet flow channel; 50-third flow channel; 51-fourth flow channel; 6-oil outlet pipe; 8-box-shaped protective cover; 80-hanging hook; 96-bushing, 961-annular groove, 962-bushing oil injection hole; 98-upper hinge shaft; 200-grease nipple. DETAILED DESCRIPTION

[0099] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application, that is, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings can be arranged and designed in various different configurations.

[0100] Therefore, the detailed description of the embodiments of the present application provided below in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0101] It should be noted that the relational terms such as "first" and "second" and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0102] The features and performances of the present application will be further described in detail below in combination with the embodiments.

[0103] Specific embodiments of the excavator connecting rod lubricating system of the present application:

[0104] The excavator connecting rod lubricating system of the present application is mainly configured on the excavator, Figure 1That is, the application is shown in the application of the excavator. The excavator connecting rod lubricating system comprises a grease pumping system, the grease pumping system comprises a lubricating pump 99, an oil supply pipeline 97 connected to the lubricating pump 99 and a grease distributor arranged close to the lubricating point and connected to the oil supply pipeline 97. In use, the lubricating pump 99 is installed on the main machine of the excavator, the oil supply pipeline 97 is arranged along the main arm of the excavator, the excavating arm 90 and extends to the position of the excavator connecting rod 1. The bucket 91 of the excavator is hinged to the excavating arm 90, the rocker 93 is also hinged to the excavating arm 90, and the excavator connecting rod 1 is also hinged between the rocker 93 and the bucket 91, so that the excavating arm 90, the bucket 91, the rocker 93 and the excavator connecting rod 1 jointly constitute a double rocker mechanism, and the telescopic cylinder whose action output end is connected to the hinged position of the rocker 93 and the excavator connecting rod 1 is also hinged to the excavating arm 90. The telescopic cylinder is driven to swing by the telescopic action, so as to realize the digging and filling action of the bucket 91.

[0105] The excavator connecting rod lubricating system of the application is mainly used for lubricating the lubricating points at the hinged positions of the bucket 91 and the excavator connecting rod 1 and the hinged positions of the excavator connecting rod 91 and the rocker 93 and the oil cylinder ear ring 92.

[0106] In order to solve the problems existing in the existing excavator connecting rod lubricating system as described in the background section, the excavator connecting rod lubricating system of the application mainly improves the structure of the excavator connecting rod. Specifically, the following will be described in detail Figures 2-7 The excavator connecting rod of the excavator connecting rod lubricating system of the application will be described in detail.

[0107] The excavator connecting rod 1 comprises a main plate body 10, and the upper and lower ends of the main plate body 10 are respectively fixedly connected with hinged shaft sleeves. The hinged shaft sleeve at the lower end is a hinged shaft sleeve for hinging with the bucket 91, which is referred to as a bucket hinged shaft sleeve 12. The hinged shaft sleeve at the upper end is a hinged shaft sleeve for hinging with the rocker hinged shaft and the telescopic cylinder ear ring, which is referred to as a telescopic cylinder hinged shaft sleeve 11. Since the telescopic cylinder hinged shaft sleeve 11 not only plays a role in hinging the excavator connecting rod and the telescopic cylinder, but also plays a role in hinging the excavator connecting rod and the rocker, the telescopic cylinder hinged shaft sleeve 11 adopts a split structure, that is, as shown in Figure 1 、 5 The position between the two parts is used for hinging the telescopic cylinder ear ring 92, and the two sides opposite to the two parts are used for hinging the two rockers 93. As such a structure, the lubricating points needing to be lubricated are at least three, as shown in Figure 4 The two-part telescopic cylinder hinged shaft sleeve corresponds to two lubricating points, and the bucket hinged shaft sleeve corresponds to one lubricating point.

[0108] In the embodiment, since there are many hinged components at the telescopic cylinder hinged shaft sleeve, the structure is relatively complex, and the structural strength requirement is high, as shown in Figure 5 、 6As shown, in specific use, a bushing 96 is sleeved between the upper hinge shaft 98 and the telescopic cylinder hinge shaft sleeve, in order to better reduce friction, a lubrication point is additionally provided between the bushing and the telescopic cylinder (see Figure 5 ) or between the bushing and the upper hinge shaft 98 (see Figure 6 ).

[0109] Of course, due to different models of excavators, on larger excavators, the telescopic cylinder for driving the bucket to perform the digging and filling action can also have two, in which case, the telescopic cylinder hinge shaft sleeve 11 can include three parts arranged in left and right intervals, such as the structure shown in Figures 9-11 , the space between the two adjacent parts of the three parts is used for hinging two telescopic cylinders, and the position on the opposite side is used for hinging the left and right rocker arms. At this time, the three-part telescopic hinge shaft sleeve is correspondingly provided with a lubrication point. Alternatively, as shown in Figures 14-15 , the length of the bucket hinge shaft sleeve is also correspondingly increased, and the bucket hinge shaft sleeve is provided with two lubrication points.

[0110] The inner plate channel is provided in the main plate body 10, so that the oil outlet of the grease distributor and the lubrication point and the oil inlet of the grease distributor and the oil supply pipeline are communicated through the inner plate channel, so that a large number of oil pipes and oil pipe fixing structures do not need to be additionally provided on the plate surface of the excavator connecting rod, and further, a protective plate for protecting the oil pipes and the grease distributor does not need to be installed on the plate surface of the excavator connecting rod, only the grease distributor 2 needs to be installed on the excavator connecting rod, or alternatively, in order to better protect the grease distributor 2, a box-shaped protective cover 8 that is appropriately sized with the grease distributor 2 is sealingly installed on the main plate body 10 to buckle the grease distributor 2 inside, so that the structure is simple, light, small in size, and beautiful in appearance, and the number of manufacturing and processing parts is small.

[0111] Specifically, as shown in Figure 4 , a distributor mounting structure, such as a connecting screw hole, for fixedly mounting the grease distributor 2 is provided on one side surface of the main plate body 10 at a middle position (of course, a position near the middle can also be used), the grease distributor 2 is a plate-type distributor (or a block-type distributor or a sheet-type distributor), the oil inlet and outlet are on the same side surface, and the grease distributor 2 is tightly installed on the main plate body 10 by the side surface provided with the oil inlet and outlet through a connecting screw.

[0112] The inboard flow channel in the main plate body 10 includes an oil outlet flow channel for the lubrication point of the hinge shaft sleeve and an oil inlet flow channel for the communication of the oil supply pipeline. The inboard ports of the oil inlet and outlet flow channels, i.e. the openings for communication with the grease distributor, are on the same side plate surface of the main plate body 10 and converge into the distributor mounting area 20, and are in sealed butt joint with the oil inlet and outlet ports of the grease distributor 2. This arrangement not only eliminates the need for a transition joint between the grease distributor and the oil inlet and outlet pipelines, reducing the number of components and simplifying installation, but also makes the height of the grease distributor protruding from the main plate body and the height of the box-shaped protective cover protruding from the main plate body as low as possible, reducing the probability of external objects bumping into the grease distributor and better protecting the grease distributor.

[0113] The design of the oil outlet flow channel varies depending on the relative position between the installation position of the grease distributor and the corresponding lubrication point. As shown in Figure 4 , the grease distributor 2 is installed at a position approximately in the middle of the main plate body 10, and the lubrication point of the bucket hinge shaft sleeve 12 is also located in the middle. Thus, a hole is punched inward from one end edge of the main plate body 10 to the distributor mounting area 20, and then an opening is made perpendicular to the plate surface of the main plate body 10, thereby forming an oil outlet flow channel 4 for supplying oil to the lubrication point of the bucket hinge shaft sleeve. Correspondingly, a through hole 100 is provided in the sleeve wall of the bucket hinge shaft sleeve 12 corresponding to the oil outlet flow channel, so that the lubricating oil discharged from the oil outlet port of the grease distributor 2 can be supplied to the lubrication point in the bucket hinge shaft sleeve through the oil outlet flow channel and the through hole 100. It should be particularly noted that the edge of the main plate body is the edge of the plate body structure as commonly understood, and the specific position can be the outer side of the plate body and the area near the outer side of the two main plate surfaces of the plate body.

[0114] The lubrication points in the telescopic cylinder hinge shaft sleeve 11 are respectively located on the left and right sides of the grease distributor 2, Figure 4 The provided oil outlet flow channel includes a first flow channel 40 extending left and right and a second flow channel 41 extending front and back. The first flow channel 40 is punched inward from the left and right sides of the main plate body 10 until the distributor mounting area 20, and then an opening is made to communicate the first flow channel 40 perpendicular to the plate surface of the main plate body 10. Then the second flow channel 41 is punched inward from the front and back directions on the side of the main plate body 10 corresponding to the lubrication point of the hinge shaft sleeve, until it communicates with the first flow channel 40. At this time, a plug is installed at the outer port position of the first flow channel, thereby forming an oil outlet flow channel 4 for supplying oil to the lubrication point of the telescopic cylinder hinge shaft sleeve. Correspondingly, a through hole is provided in the sleeve wall of the telescopic cylinder hinge shaft sleeve 11 corresponding to the oil outlet flow channel, so that the lubricating oil discharged from the oil outlet port of the grease distributor 2 can be supplied to the lubrication point in the telescopic cylinder hinge shaft sleeve through the oil outlet flow channel and the through hole.

[0115] Of course, as Figure 11 , 15The different forms of the excavator connecting rod shown, the telescopic cylinder hinge shaft sleeve has three parts, and the corresponding lubrication point has three places. Combined with the shape of the main plate body and the position of the grease distributor, a type of oil outlet flow channel 4 can be directly inclined from the distributor mounting area 20 to the position corresponding to the lubrication point, or the second flow channel 41 constituting a type of oil outlet flow channel 4 is inclined to the position corresponding to the lubrication point.

[0116] The above description of the shape of the oil outlet flow channel is mainly provided for different forms of excavator connecting rods, and cannot be considered as limiting the shape of the oil outlet flow channel to the above-mentioned shapes. For example, the oil outlet flow channel corresponding to each lubrication point can be directly linearly extended from the distributor mounting area, but some oil outlet flow channels will have a larger angle with the side of the main plate body, which is not convenient for drilling.

[0117] In addition, as introduced above, additional lubrication points are provided between the bushing and the telescopic cylinder (see Figure 5 ) or between the bushing and the hinge shaft (see Figure 6 ), and the main plate body 10 also has a second type of oil outlet flow channel 5 for supplying oil to such lubrication points. The shape of the second type of oil outlet flow channel 5 can also be linear, curved or zigzag. In the examples listed in this paper, considering the convenience of drilling directly on the main plate body, the second type of oil outlet flow channel 5 is linear, and extends directly from the distributor mounting area 20 to the side of one end of the telescopic cylinder hinge shaft sleeve 11 on the main plate body 10, between the two adjacent parts of the telescopic cylinder hinge shaft sleeve 11. At this position, it is convenient to connect to the corresponding lubrication point through a relatively short oil outlet pipe 6.

[0118] As shown in Figure 5 , 6 , the first way, the oil cylinder ear ring 92 is provided with a lubrication point through oil hole penetrating from the outer surface to the inner cavity, and the oil outlet flow channel 5 in the main plate body is connected to the through oil hole on the oil cylinder ear ring through the grease pipe 6 and supplies oil to the lubrication point. The second way, the hinge shaft sleeve at the upper end of the excavator connecting rod is connected to the oil cylinder ear ring 92 through the upper hinge shaft 98, the first oil channel extending axially and the second oil channel extending radially in the upper hinge shaft 98 lead to the lubrication point in the inner cavity of the oil cylinder ear ring 92, and the oil outlet flow channel 5 in the main plate body is connected to the first oil channel through the grease pipe 6, and then the corresponding lubrication point can be supplied with oil through the first oil channel and the second oil channel.

[0119] And as shown in Figure 11 and Figure 15In the two shown excavator link structures, because the telescopic cylinder hinge shaft sleeve has three parts, the additional lubrication points between the bushing and the telescopic cylinder or between the bushing and the hinge shaft are also increased to two, and the two second oil outlet channels 5 are also arranged with two, and the forms of the two second oil outlet channels in the examples are different according to the two excavator link structures. In order to improve the structural strength of the excavator link, the T-shaped reinforcing rib plate is arranged on the main plate body, and the grease distributor 2 is installed at a position deviating from the center of the main plate body but close to one side of the center of the main plate body. Among the two second oil outlet channels, one is linear, and the other includes a third channel 50 extending left and right and a fourth channel 51 extending front and back.

[0120] In addition, it needs to be additionally explained here that, in the excavator link as shown in Figure 11 、 15 , because the number of in-plate channels is large, the in-plate long holes corresponding to the oil outlet channels of different lubrication points intersect each other (the second channel extending obliquely to the right and the third channel extending to the right on the right side in the figure), in order to ensure that the oil pumping system can stably and reliably supply oil to each lubrication point as needed, a plug is installed at the intersection position of the in-plate long holes (not shown in the figure) to ensure that the channels corresponding to each lubrication point are independent channels.

[0121] The design of the oil inlet channel mainly considers that the arrangement of the oil supply pipeline will not interfere with other external components. Preferably, two different ways are provided herein. The first way, as shown in Figure 4 、 5 , 6, 7, 11, 14, 15, the oil inlet channel is linear, extending directly from the distributor mounting area to one end side of the main plate body 10 in the front and rear direction, especially to the end where the telescopic cylinder hinge shaft sleeve 11 is located, which is closer to the excavator arm. The oil supply pipeline from the excavator arm can be more conveniently connected to the outer port of the oil inlet channel. This way, when machining, the hole is directly punched on the side of the end of the main plate body 10 where the telescopic cylinder hinge shaft sleeve is located until the distributor mounting area, and then the inner end position of the corresponding hole is opened and communicated perpendicular to the plate surface of the main plate body. Of course, in order to reserve more installation space, the outer port of the oil inlet channel is between the two parts adjacent to the telescopic cylinder hinge shaft sleeve. The second way, as shown in Figure 12 、 13The shown excavator connecting rod structure, the grease distributor 2 is installed near the middle position of the main plate body 10 close to the side of the telescopic cylinder hinge shaft sleeve, the oil inlet flow channel is perpendicular to the plate surface of the main plate body 10 and penetrates the through hole of the main plate body 10, the opening of the oil inlet flow channel and the inner port of the oil outlet flow channel are on the same side surface, and the oil inlet port of the grease distributor is connected, the opening of the oil inlet flow channel and the inner port of the oil outlet flow channel are on different side surfaces, and are used for connecting with the oil supply pipeline, so that the oil inlet flow channel with a relatively long length is not needed to be opened on the main plate body 10, the machining of the main plate body is simplified, and at the same time, since the installation area of the distributor is close to the position of the telescopic cylinder hinge shaft sleeve, the length of the oil supply pipeline is not excessively increased, and the arrangement of the oil supply pipeline is not troublesome.

[0122] In addition, in the excavator connecting rod structure as shown in Figure 12 、 13 We can see that the second type of oil outlet flow channel adopts the same structural design as the oil inlet flow channel, and is also a through hole perpendicular to the plate surface of the main plate body 10 and penetrating the main plate body 10, and the opening at the end of the through hole away from the grease distributor is connected to the corresponding lubrication point through an oil pipe. The design consideration is the same as that of the oil inlet flow channel.

[0123] This paper also provides other different aspects of optimization design scheme.

[0124] For example, the main plate body of the excavator connecting rod is also provided with an inspection hole in communication with the in-plate flow channel. After the excavator is stopped for a long time, the lubricating grease in the in-plate flow channel may be dry and clog the flow channel, and the in-plate flow channel can be easily cleaned by providing the inspection hole. In the examples listed in this paper, since the oil inlet flow channel is relatively short and the outer port is exposed, it is convenient for the cleaning tool (such as a flexible tool such as a steel wire) to extend in for cleaning, therefore, in the examples listed in this paper, the inspection hole is arranged on the oil outlet flow channel, such as the examples shown in Figure 5 、 6 , 7, the inspection hole 43 is preferably arranged on the second flow channel 41, both ends of which are in the excavator connecting rod and the cleaning tool cannot extend in, and a plugging plug 400 can be detachably installed thereon. On this basis, more preferably, the inspection hole 43 is arranged as shown in Figure 7 and 13 , which is inclined to the extension direction of the in-plate flow channel, and is arranged at intervals in the length direction of the second flow channel 41. Specifically in terms of machining, as shown in Figure 16As shown, the main plate body 10 can be cast in a way that a boss structure is cast on the plate surface and inclined to the side of the plate surface. After the oil outlet flow channel 4 is drilled in the main plate body 10, the inspection hole 43 is drilled along the inclined extension direction of the boss. During normal use, the inspection hole 43 can be blocked by the blocking plug 400. Of course, as shown in the figure, the inspection hole 43 is on the plate surface of the main plate body. In other embodiments, when the oil outlet flow channel extends close to the edge of the main plate body, the inspection hole can also be opened on the left and right side surfaces of the main plate body.

[0125] For example, as shown in Figure 8 , a hook 80 is arranged on the outer surface of the box-shaped protective cover 8 to facilitate hoisting the excavator connecting rod.

[0126] According to actual use needs, the grease distributor can be a progressive distributor or a double-line distributor or a single-line distributor. The lubricating pump used in the excavator connecting rod lubrication system shown in the drawings herein is a double-way pump, and the grease distributor is a progressive distributor or a single-line distributor. In other embodiments, if a double-line lubricating pump and a double-line grease distributor are used, another oil inlet flow channel needs to be opened on the main plate body to be connected to the second oil inlet of the double-line distributor.

[0127] From Figure 2 , 3 , 4, 9, 10, 11, 14, 15, we can see that the hinge shaft sleeve is also provided with a manual filling port 13. These manual filling ports 13 have the same structure as the manual filling ports on the existing excavator connecting rod and can manually fill lubricating grease into the lubrication points. In addition, in the excavator connecting rod provided by the present application, the manual filling ports can also be used as inspection holes.

[0128] As Figures 17-18As shown, the sixth structural form of the present application is different from the above structural forms in that the original bushing oil injection hole 962 and the ring groove 961 on the bushing 96 and the manual injection opening 13 on the telescopic cylinder hinge shaft sleeve 11 are used as the maintenance access. That is, when the bushing 96 is installed on the telescopic cylinder hinge shaft sleeve 11, the bushing oil injection hole 962 on the bushing 96 is directly aligned with the manual injection opening 13 on the telescopic cylinder hinge shaft sleeve 11, that is, coaxially aligned. The bushing 11 does not rotate in use because it is in interference fit with the telescopic cylinder hinge shaft sleeve 11. If rotation is a concern, a rotation stopping structure can be provided between the two to prevent relative rotation. In use, in normal use, the grease nipple 200 at the manual injection opening 13 or the blocking plug 400 is in a closed state to close the access from the outside. When manual injection of lubricating grease to the pin shaft is needed, if the grease nipple 200 is used, it is directly connected at the grease nipple 200. The grease nipple 200 is in a connected state after connection (the grease nipple is like a one-way valve), and lubricating grease can be injected into the bushing 96. When the corresponding oil outlet flow channel (i.e. the second flow channel) is blocked, the grease nipple 200 or the blocking plug 400 at the corresponding manual injection opening (i.e. the maintenance hole) can be removed. A long and hard rod-shaped object such as a steel wire, an iron wire, or a long drill bit, a long reinforcing bar, etc. is inserted from the manual injection opening 13, passes through the bushing oil injection hole 962, and enters the second flow channel 41 to unblock the sludge or dry lubricating grease blocked in the second flow channel 42, achieving the purpose of maintenance. This scheme has the advantages of low cost, time and labor saving, and no effect on the strength of the connecting rod structure compared with other schemes of providing a maintenance hole.

[0129] In the manufacturing of the excavator connecting rod of the excavator connecting rod lubricating system of the present application, first, the main plate body of the required shape is processed, then the holes for the in-plate flow channel are punched at the corresponding positions on the side of the main plate body and the corresponding positions on the plate surface, the hinge shaft sleeve is processed and the oil passage is opened at the corresponding position of the hinge shaft sleeve, and then the hinge shaft sleeve is welded at the upper end of the main plate body in the determined position. In order to better avoid the reliable sealing of the oil outlet flow channel and the oil passage at the welding interface of the main plate body and the hinge shaft sleeve, as shown in the above embodiments, a sealing sleeve 101 is installed at the joint position of the oil outlet flow channel and the oil passage, and the two ends of the sealing sleeve 101 are inserted into the oil outlet flow channel and the oil passage respectively, so that the two do not leak at the welding interface of the hinge shaft sleeve and the main plate body when connected. Figures 5-7

[0130] In use, the excavator connecting rod position of the excavator connecting rod lubricating system of the present application has a simple structure, less external structure, an attractive appearance, and an oil circuit that will not be damaged, ensuring the reliability of oil supply lubrication.

[0131] Of course, the excavator connecting rod lubricating system of the present application is not limited to the above embodiments. Several more preferred deformation modes are also provided below.

[0132] ​For example, unlike the above-mentioned embodiments, the in-plate flow channel is only an oil outlet flow channel without an oil inlet flow channel, and the oil supply pipeline is directly connected to the grease distributor. Since the oil inlet of the grease distributor is generally one or two, when the oil inlet of the grease distributor is directly connected by the oil supply pipeline, there are at most two oil supply pipelines for oil inlet at the position of the excavator connecting rod, which will not cause too many and too long oil pipes at the excavator connecting rod, and will not cause too complex structure. At this time, it is also not necessary to set a protective plate to specially protect the oil supply pipeline.

[0133] For example, unlike the above-mentioned embodiments, the main plate body can be manufactured by welding two plate bodies with the same shape and opposite plate surfaces, and milling grooves on one of the plate bodies or both plate bodies. After the two plate bodies are combined, the grooves form the in-plate flow channel. Similarly, in other embodiments, the main plate body can be manufactured by first manufacturing a plate body with the required shape, and then welding a plate strip with a pipeline or channel inside on one side of the plate body. The plate strip and the plate body together form the main plate body, and the pipeline or channel is used to form the in-plate flow channel. Of course, the outer port of the in-plate flow channel of the main plate body in these two structural forms can also not be at the side edge of the main plate body. Taking the main plate body manufactured by the first processing method as an example, the groove on the plate body does not extend to the edge position of the plate body. During processing, an end hole penetrating the thickness of the plate can be processed on one of the plate bodies near the edge of the groove. After the two plate bodies are combined to form the main plate body, the end hole forms the outer port of the oil outlet flow channel. The lubricating oil can be introduced to the corresponding lubrication point through the external oil outlet pipe. At this time, the outer port of the oil outlet flow channel is not extended to the side edge of the main plate body to be near the edge of the main plate body. Similarly, when the main plate body is manufactured by the second method, the end of the pipeline or channel in the plate strip can be set to extend in a direction perpendicular to the plate surface of the main plate body. At this time, the outer port of the oil outlet flow channel can also be set near the edge of the main plate body. This case can be used when the outer port of the in-plate flow channel corresponding to some lubrication points is not convenient to set at the edge of the main plate body.

[0134] In the above-mentioned embodiments, the oil outlet flow channel for supplying oil to the lubrication points in the telescopic cylinder hinge shaft sleeve extends to the upper end edge of the main plate body. In other embodiments, the oil outlet flow channel for supplying oil to the lubrication points in the telescopic cylinder hinge shaft sleeve can be in the form shown in Figure 12 or 13. The outer port of the oil outlet flow channel is in the grease distributor mounting area on the main plate body, or it is also feasible to be at the upper side of the grease distributor mounting area of the main plate body. Of course, the setting method of the oil inlet flow channel is also applicable to this kind of way, such as its outer port is at the upper side of the grease distributor mounting area on the main plate body.

[0135] In the above described embodiments, the oil distributor is basically installed at the middle part of the main plate body or the area close to the middle part. In other embodiments, the oil distributor can also be installed at the edge of the main plate body, for example, at the upper end edge of the main plate body.

[0136] In the above described embodiments, the plug 400 is installed at the access hole to ensure that the lubricating oil will not leak during normal use. In other embodiments, a grease nipple (commonly known as a grease nipple) can also be installed at the access hole. The grease nipple can be a straight-through type, a joint type or a screw cap type. The grease nipple has a function similar to a one-way valve, which can be opened when the lubricating grease is filled or the oil passage in the plate is cleaned, and is normally closed. During normal use, the grease nipple can also ensure the sealing of the access hole, and can also manually supplement the oil in the oil passage in the plate through the grease nipple, or when cleaning the oil passage in the plate, the oil passage in the plate can be directly manually pressed to open the blockage.

[0137] In the above described embodiments, the main plate body and the hinge shaft sleeve are connected by welding in a split structure. In other embodiments, the two can be directly integrally cast into shape, and then machined to ensure the machining accuracy of the structures such as the oil passage in the plate and the inner hole of the hinge shaft sleeve. At this time, the oil outlet passage and the oil passage hole become a through hole structure, and there is no need to set a sealing sleeve.

[0138] Specifically, the structure of the seventh excavator connecting rod is as follows Figures 19-21As shown, in this embodiment, the structure of the excavator connecting rod is an integral casting structure, i.e., the main plate body 10, the telescopic cylinder hinge shaft sleeve 11, and the bucket hinge shaft sleeve 12 are integrally cast, generally made of steel casting. In this structure, the lower part of the main plate body 10 has a tunnel-shaped hole to reduce weight, and the main plate body 10 is also a kind of I-beam-like rib plate combined structure, not a plate structure with consistent thickness. The installation area of the main plate body 10 corresponding to the distributor 2 is a thin plate, i.e., a structure with grooves on both sides, and the distributor 2 is installed in the groove, which is convenient for protection, such as directly covering the groove with a square plate cover. The cast connecting rod needs to be machined, for example, the oil channel is processed by a drilling machine, such as a first long hole penetrating the telescopic cylinder hinge shaft sleeve 11 along the length direction of the connecting rod and a second long hole penetrating the lubrication point of the bucket hinge shaft sleeve 12. The first long hole and the second long hole can be coaxially arranged, and the first long hole and the second long hole are the second flow channel 41 in the above embodiment. The opening of the second flow channel 41 near the corresponding hinge shaft sleeve constitutes an inspection hole 43. When the second flow channel 41 is blocked, a slender rod can be inserted through the inspection hole 43 to clean the blockage. The inspection hole 43 is usually sealed by a plug 400 (i.e., a screw plug), and only when it needs to be repaired, the screw plug is removed. On the telescopic cylinder hinge shaft sleeve 11 and the bucket hinge shaft sleeve 12, a manual filling port 13 is also arranged in a direction perpendicular to the second flow channel 41, and a grease nipple 200 is arranged at the manual filling port 13, so that manual filling of grease can be performed through the grease nipple 200. The first flow channel 40 is machined on the main plate body 10 in the width direction (perpendicular to the direction of the second flow channel 41) by machining, and the first flow channel 40 is in the same plane as the second flow channel 41, so that the first flow channel 40 and the second flow channel 41 can be connected to form a kind of oil outlet flow channel 4. The oil inlet end of the first flow channel 40 extends to the distributor installation area 20, so that it can be connected with the oil outlet of the distributor 2 installed there. The lubricating grease flowing out of the distributor 2 can flow to the lubrication point (between the bushing and the hinge shaft) of the telescopic cylinder hinge shaft sleeve 11 or the bucket hinge shaft sleeve 12 through the first flow channel 40 and the second flow channel 41.

[0139] When machining the oil channel of the cast connecting rod, considering that there may be shrinkage holes in the cast connecting rod that affect the normal flow of the lubricating grease, a fast-curing plastic, resin, or other filler can be poured into the hole after the first drilling, and then the second drilling is performed on the basis of the first drilling after the filler is solidified, i.e., the second drilling is coaxial with the first drilling.

[0140] In the above-described embodiments, the grease distributor is sealed and attached to the plate surface of the main plate body. In other embodiments, when the grease distributor is installed on the main plate body, a sealing adapter can be installed on the oil port of the grease distributor, the sealing adapter is perpendicular to the plate surface of the main plate body, and then the sealing adapter is sealingly connected with the inner port of the corresponding in-plate flow channel of the main plate body.

[0141] The application further provides a specific embodiment of the excavator connecting rod, which has the same structure as the excavator connecting rod in the above-mentioned embodiment of the excavator connecting rod lubricating system, and thus will not be described herein again.

[0142] The application further provides a specific embodiment of the connecting rod assembly, which mainly comprises the excavator connecting rod and the grease distributor sealingly and fitly mounted on the excavator connecting rod. The structure of the excavator connecting rod and the assembly relationship between the excavator connecting rod and the grease distributor are described in the above-mentioned embodiment of the excavator connecting rod lubricating system, and thus will not be described herein again.

[0143] The above-mentioned is only a preferred embodiment of the application, and is not used to limit the application. The patent protection scope of the application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings of the application should also be included in the protection scope of the application.

Claims

1. A backhoe linkage comprising: a main plate body having a hinge pin sleeve at each end, the hinge pin sleeve having a lubrication point within the sleeve; characterized in that: the main plate body has a grease dispenser mounting structure for mounting a grease dispenser to the main plate body; the main plate body has a plurality of internal flow channels, including oil outlet flow channels, the outer ends of at least some of the oil outlet flow channels extending to or near the edge of the main plate body for connection to the lubrication points of the hinge pin sleeves; the inner ends of the internal flow channels are on the same side of the main plate body and converge at the mounting area of the grease dispenser, and when the grease dispenser is mounted to the main plate body, the inner ends of the internal flow channels are in communication with the corresponding ports of the grease dispenser.

2. The excavator link of claim 1, wherein the internal flow channels are formed by internal bores drilled in the main plate body and extending parallel to the plate surface, the outer ends of the internal flow channels being at the side edges of the main plate body.

3. The excavator link according to claim 1 or 2, characterized in that the sleeve wall of the hinge pin sleeve has a through hole for the lubrication point that extends from the outer surface of the hinge pin sleeve to the internal cavity of the hinge pin sleeve, and the oil outlet flow channels are in communication with the through hole and supply oil to the lubrication point.

4. The excavator link of claim 3, wherein, the lower end of the main plate body has at least one through hole in the hinge pin sleeve, and the upper end of the main plate body has at least two through holes in the hinge pin sleeve that are spaced apart in the axial direction, each through hole corresponding to an oil outlet flow channel.

5. The excavator link according to claim 1 or 2, characterized in that, the upper end of the main plate body has a through hole in the hinge pin sleeve, each through hole corresponding to an oil outlet flow channel, and the outer ends of the oil outlet flow channels connected to the upper end of the hinge pin sleeve are in the area of the grease dispenser mounting structure and above the main plate body.

6. The excavator link of claim 5 wherein, the outer ends of the oil outlet flow channels connected to the upper end of the hinge pin sleeve are at the upper side of the main plate body, and the oil outlet flow channels connected to the upper end of the hinge pin sleeve are formed by through holes that extend through the main plate body.

7. The excavator link according to claim 1 or 2, wherein the internal flow channels also include an oil inlet flow channel, the inner end of the oil inlet flow channel being in communication with the oil inlet port of the grease dispenser.

8. The excavator link of claim 7, wherein, the outer end of the oil inlet flow channel is in the area of the grease dispenser mounting structure and above the main plate body.

9. The excavator link of claim 8, wherein, the outer end of the oil inlet flow channel is at the upper side of the main plate body, and the oil inlet flow channel is formed by a through hole that extends through the main plate body.

10. The excavator link of claim 1 or 2, wherein, the main plate body has an access hole corresponding to the internal flow channels, the access hole extending inward from the surface of the main plate body to the internal flow channels, and the access hole is provided with a plug or oil injection cup.

11. The excavator link according to claim 1 or 2, characterized in that, the hinge pin sleeve has an access hole corresponding to the oil outlet flow channel, the access hole extending through the sleeve wall on both sides of the corresponding hinge pin sleeve, the access hole in the hinge pin sleeve is coaxially arranged with the corresponding oil outlet flow channel, and the access hole is provided with a plug or oil injection cup.

12. The excavator link of claim 11, wherein, the hinge pin sleeve also has a bushing coaxially and interference-fitted therein, the outer surface of the bushing has an annular groove, the annular groove has a bushing oil injection hole that connects the outer surface of the bushing to the internal cavity, and the bushing oil injection hole is coaxially arranged with the access hole.

13. The excavator link of claim 11 wherein, the hinge pin sleeve and the main plate body are integrally cast, the internal flow channels include a long oil channel that extends along the length of the main plate body, the long oil channel is formed by drilling, and the long oil channel includes the access hole and the oil outlet flow channel.

14. The excavator link of claim 1 or 2, wherein, the main plate body and the hinge pin sleeve are welded together, the outer ends of the oil outlet flow channels extend to the abutment surface of the hinge pin sleeve on the main plate body, the sleeve wall of the hinge pin sleeve has a through hole that extends from the outer surface of the hinge pin sleeve to the internal cavity of the hinge pin sleeve, the oil outlet flow channels are in communication with the through hole and supply oil to the lubrication point, and the through hole and the oil outlet flow channel are provided with a sealing sleeve that has two ends extending into the through hole and the oil outlet flow channel.

15. A linkage assembly comprising: a backhoe linkage; Grease distributor The excavator connecting rod is as claimed in any one of claims 1-14, the grease distributor is installed on the main plate body of the excavator connecting rod, and the inner ports of the plate inner flow channels are communicated with the corresponding oil ports of the grease distributor.

16. The link assembly of claim 15, wherein, The box-shaped protective cover is sealingly buckled on the main plate body and covers the grease distributor inside.

17. The link assembly of claim 16, wherein, The outer side of the box-shaped protective cover is further provided with lifting lugs.

18. An excavator connecting rod lubricating system, comprising: A grease pumping system, comprising a lubricating pump, an oil supply pipeline and a grease distributor; The excavator connecting rod lubricating system further comprises: The excavator connecting rod is as claimed in any one of claims 1-14, The grease distributor is installed on the main plate body of the excavator connecting rod, and the inner ports of the plate inner flow channels are communicated with the corresponding oil ports of the grease distributor.

19. The excavator link lubrication system of claim 18, wherein, The excavator connecting rod lubricating system further comprises a box-shaped protective cover, which is sealingly buckled on the main plate body and covers the grease distributor inside.

20. The excavator link lubrication system of claim 19, wherein, The outer side of the box-shaped protective cover is further provided with lifting lugs.

21. The excavator link lubrication system of claim 18 or 19 or 20, wherein, The grease distributor is a progressive distributor or a double-line distributor or a single-line distributor.

22. The excavator link lubrication system of claim 18 or 19 or 20, wherein, The oil inlet flow channel of the grease distributor is connected with the oil supply pipeline through a joint.

23. The excavator link lubrication system of claim 18 or 19 or 20, wherein, The hinge shaft sleeve at the upper end of the excavator connecting rod is hingedly connected with the oil cylinder ear ring, the oil cylinder ear ring is provided with an oil passing hole penetrating from the outer surface to the lubrication point in the inner cavity, and the oil outlet flow channel in the main plate body has one through the grease pipeline to connect the oil passing hole on the oil cylinder ear ring.

24. The excavator link lubrication system of claim 18 or 19 or 20, wherein, The hinge shaft sleeve at the upper end of the excavator connecting rod is hingedly connected with the oil cylinder ear ring through the upper hinge shaft, the first oil channel and the second oil channel axially and radially extending in the upper hinge shaft lead to the lubrication point in the inner cavity of the oil cylinder ear ring, and the oil outlet flow channel in the main plate body has one through the grease pipeline to connect the first oil channel.

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