Automatic pin shaft lubricating structure and excavator

Abstract

The utility model provides an automatic pin shaft lubricating structure and an excavator, and relates to the technical field of engineering machinery. The structure comprises a pump assembly; a dispenser; the lubricating pipeline comprises at least one main lubricating pipeline and a plurality of branch lubricating pipelines, one end of the main lubricating pipeline is communicated with the pump assembly, the other end of the main lubricating pipeline is communicated with one end of each branch lubricating pipeline through a distributor, and the other end of each branch lubricating pipeline is correspondingly communicated with an oil cavity of each pin shaft of the excavator; the distributor is arranged on the main lubricating pipeline, and at least one end is connected with the branch lubricating pipeline; the detection assembly comprises a plurality of first detection pieces and a plurality of second detection pieces, the first detection pieces are correspondingly connected with the branch lubricating pipelines, and the control assembly is configured to control the pump assembly to be started when the oil quantity in the oil cavity of the pin shaft is smaller than or equal to a preset oil quantity value, and control the pump assembly to be stopped when the flow of the branch lubricating pipelines is smaller than or equal to a preset flow value. And controlling the pump assembly to close the pump assembly. Therefore, all the pin shafts can be conveniently and automatically lubricated.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, and in particular to an automatic lubrication structure for a pin shaft and an excavator. Background Technology

[0002] The actuators of machinery require lubrication. Taking an excavator as an example, an excavator consists of a boom, stick, bucket, connecting rod, and rocker arm connected sequentially by pins. During excavator operation, to prevent wear on the pins, they need to be lubricated with grease periodically.

[0003] In the existing technology, the pin is lubricated by manually adding grease, or by a semi-automatic lubrication method, which requires periodically pressing the automatic lubrication button to open the lubrication path and lubricate the pin through multiple distributors.

[0004] However, manually adding grease is time-consuming and laborious, and semi-automatic lubrication is also prone to forgetting to press the button, resulting in forgetting to add grease and causing wear on the pin. Utility Model Content

[0005] This application provides an automatic lubrication structure for a pin shaft and an excavator, which solves the problems of time-consuming and laborious manual grease addition, and the ease with which semi-automatic lubrication can lead to forgetting to press the button, resulting in forgotten grease addition and wear on the pin shaft.

[0006] To achieve the above objectives, the technical solution of this application is as follows:

[0007] On one hand, this application provides an automatic lubrication structure for pins, including: a pump assembly; a distributor; lubrication lines, including at least one main lubrication line and multiple branch lubrication lines, one end of the main lubrication line being connected to the pump assembly, and the other end of the main lubrication line being connected to one end of each branch lubrication line via the distributor, the other end of each branch lubrication line being connected to the oil chamber of each pin of the excavator; a detection assembly, including multiple first detection elements and multiple second detection elements, each first detection element being connected to each branch lubrication line to detect the flow rate of the branch lubrication line, and each second detection element being connected to each pin to detect the amount of oil in the oil chamber of the pin; a control assembly, electrically connected to the first detection elements, the second detection elements, and the pump assembly; the control assembly is configured to control the pump assembly to start when the amount of oil in the oil chamber of the pin is less than or equal to a preset oil amount value, and to provide an error message and control the pump assembly to shut down when the flow rate of the branch lubrication line is less than or equal to a preset flow rate value.

[0008] In one possible implementation, the automatic lubrication structure for the pin in this application embodiment has a distributor with multiple oil outlets and at least one oil inlet. The oil inlet is connected to the pump assembly via the main lubrication pipeline, and each oil outlet is connected to a corresponding branch lubrication pipeline.

[0009] In one possible implementation, the automatic lubrication structure for the pin shaft in this application embodiment includes a main lubrication pipeline comprising multiple first fittings and at least two second fittings. The distributor is connected to the pump assembly through the first fittings. One second fitting is disposed along the top plate of the excavator's boom, and another second fitting is disposed along the top plate of the excavator's stick. The two second fittings are connected to each other through the first fittings.

[0010] In one possible implementation, the automatic lubrication structure for the pin shaft in this embodiment of the application further includes a transition member in the main lubrication pipeline. The transition member is disposed at both ends of the second pipe disposed along the top plate of the boom, and is used to communicate with the branch lubrication pipeline.

[0011] In one possible implementation, the automatic lubrication structure for the pin in this application embodiment has a first fitting being a flexible hose and a second fitting being a steel pipe.

[0012] In one possible implementation, the automatic lubrication structure for the pin shaft in this application embodiment further includes a pipe fastener in the main lubrication pipeline. The pipe fastener is used to connect to the second pipe fitting so that the second pipe fitting is fixed on the excavator.

[0013] In one possible implementation, the automatic lubrication structure for the pin in this application embodiment has at least one branch lubrication line equipped with a T-connector for communicating with the pin.

[0014] In one possible implementation, the automatic lubrication structure for the pin in this embodiment of the application has one end of the branch lubrication pipeline detachably connected to the threaded pipe joint of the pin.

[0015] In one possible implementation, the automatic lubrication structure for the pin in this application embodiment has a first detection element being a flow sensor, which is installed on the branch lubrication pipeline, and a second detection element being an oil quantity sensor, which is installed in the oil cavity of the pin.

[0016] On the other hand, this application provides an excavator, including: an excavator body and an automatic lubrication structure for the pin shaft as described in any of the above embodiments, disposed on the excavator body.

[0017] The automatic lubrication structure for pins and the excavator provided in this application include: a pump assembly; a distributor; lubrication pipelines, including at least one main lubrication pipeline and multiple branch lubrication pipelines. One end of the main lubrication pipeline is connected to the pump assembly, and the other end of the main lubrication pipeline is connected to one end of each branch lubrication pipeline via the distributor. The other end of each branch lubrication pipeline is connected to the oil chamber of each pin of the excavator; a detection assembly, including multiple first detection elements and multiple second detection elements, each first detection element being connected to each branch lubrication pipeline to detect the flow rate of the branch lubrication pipeline, and each second detection element being connected to each pin to detect the amount of oil in the oil chamber of the pin; and a control assembly. The pump assembly provides lubricating oil, and the distributor accurately distributes the lubricating oil input by the pump assembly through the main lubrication pipeline to each branch lubrication pipeline to fully lubricate the pins at each position. By cooperating with the distributor and lubrication lines, a second detection element detects the oil level in the oil chamber of each pin. When the detected oil level is less than or equal to a preset value, the pump assembly automatically starts, and lubricating oil automatically lubricates each pin through the lubrication lines and distributor, eliminating the need for manual operation and providing greater convenience. Furthermore, a first detection element detects the flow rate in the branch lubrication lines. When the detected flow rate is less than or equal to a preset value, the control component provides an error message and shuts down the pump assembly, thus identifying any blockages during automatic lubrication and facilitating timely maintenance. Therefore, this application facilitates automatic lubrication of each pin. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 This is a schematic diagram of the automatic lubrication structure for the pin shaft and the structure of the excavator provided in the embodiments of this application;

[0020] Figure 2 for Figure 1 Enlarged structural diagram of section B;

[0021] Figure 3 for Figure 1 Enlarged structural diagram of section A;

[0022] Figure 4 for Figure 1 A magnified schematic diagram of the structure of section C.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10-Pin; 11-Boom; 12-Stick;

[0025] 100-Pump assembly;

[0026] 200 - Lubrication piping;

[0027] 210 - Main lubrication pipeline; 211 - First fitting; 212 - Second fitting; 213 - Transition fitting; 214 - Pipe fixing fitting; 215 - Tee;

[0028] 220-Branch lubrication pipeline;

[0029] 300-distributor;

[0030] 310 - Oil outlet;

[0031] 320 - Oil inlet;

[0032] 400 - Detection Components;

[0033] 410 - First inspection piece;

[0034] 420 - Second inspection piece;

[0035] 500 - Control Components.

[0036] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0038] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and are not intended to indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0039] Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] The actuators of machinery require lubrication. Taking an excavator as an example, an excavator consists of a boom, stick, bucket, connecting rod, and rocker arm connected sequentially by pins. During excavator operation, to prevent wear on the pins, they need to be lubricated with grease periodically.

[0042] In existing technology, the pins are lubricated by manually adding grease. However, manual lubrication requires adjusting the working device to a position accessible to the operator before adding grease, which is time-consuming and labor-intensive. Furthermore, forgetting to add grease can lead to pin wear and eventual replacement. Currently, a small number of excavators on the market use semi-automatic lubrication systems, but these still require manually pressing a switch to activate automatic lubrication. They also use multiple distributors, increasing manufacturing costs, and there is a risk of forgetting to periodically press the switch, resulting in the pins failing to lubricate.

[0043] In view of this, embodiments of this application provide an automatic lubrication structure for pins and an excavator, comprising: a pump assembly; a distributor; lubrication pipelines, including at least one main lubrication pipeline and multiple branch lubrication pipelines, one end of the main lubrication pipeline being connected to the pump assembly, the other end of the main lubrication pipeline being connected to one end of each branch lubrication pipeline via the distributor, and the other end of each branch lubrication pipeline being correspondingly connected to the oil chamber of each pin of the excavator; a detection assembly, including multiple first detection elements and multiple second detection elements, each first detection element being correspondingly connected to each branch lubrication pipeline for detecting the flow rate of the branch lubrication pipeline, and each second detection element being correspondingly connected to each pin for detecting the amount of oil in the oil chamber of the pin; and a control assembly electrically connected to the first detection elements, the second detection elements, and the pump assembly. By cooperating with the distributor and lubrication lines, the second detection element detects the oil level in the oil chamber of the pin, automatically activating the pump assembly. Lubricating oil then automatically lubricates each pin through the lubrication lines and distributor, eliminating the need for manual operation and providing greater convenience. Furthermore, the first detection element detects the flow rate in the branch lubrication lines, thereby determining whether there are any blockages during automatic lubrication and ensuring normal operation. Therefore, this application facilitates automatic lubrication of each pin.

[0044] The following is combined with Figures 1 to 4 The present application will be described in detail with reference to specific embodiments. Figure 1This is a schematic diagram of the automatic lubrication structure for the pin shaft and the structure of the excavator provided in the embodiments of this application; Figure 2 for Figure 1 Enlarged structural diagram of section B; Figure 3 for Figure 1 Enlarged structural diagram of section A; Figure 4 for Figure 1 A magnified schematic diagram of the structure of section C.

[0045] On one hand, this application provides an automatic lubrication structure for pins, including: a pump assembly 100; a distributor 300; a lubrication pipeline 200, including at least one main lubrication pipeline 210 and multiple branch lubrication pipelines 220, one end of the main lubrication pipeline 210 being connected to the pump assembly 100, and the other end of the main lubrication pipeline 210 being connected to one end of each branch lubrication pipeline 220 via the distributor 300, the other end of each branch lubrication pipeline 220 being correspondingly connected to the oil chamber of each pin 10 of the excavator; and a detection assembly 400, including multiple first detection elements 410 and multiple second detection elements 420, each first detection element 410 being connected to each branch lubrication pipeline 220. The branch lubrication line 220 is connected to the corresponding branch lubrication line 220 for detecting the flow rate of the branch lubrication line 220. Each second detection element 420 is connected to each pin 10 for detecting the amount of oil in the oil chamber of the pin 10. The control component 500 is electrically connected to the first detection element 410, the second detection element 420 and the pump assembly 100. The control component 500 is configured to control the pump assembly 100 to turn on when the amount of oil in the oil chamber of the pin 10 is less than or equal to a preset oil amount value, and to provide an error message and control the pump assembly 100 to turn off when the flow rate of the branch lubrication line 220 is less than or equal to a preset flow rate value.

[0046] Specifically, the excavator includes a boom 11, a stick 12, a bucket 13, a connecting rod 14, and a rocker arm 15. The rear support of the boom 11 is connected to the excavator body via a pin 10. The boom 11 and the stick 12 are connected via a pin 10, and the stick 12 is connected to the bucket 13 via a pin 10. The connecting rod 14 is located at the end of the stick 12 opposite to the boom 11. One end of the rocker arm 15 is connected to the bucket 13 via a pin 10, and the other end is connected to the connecting rod 14 via a pin 10. It should be noted that there are two connecting rods 14 and two rocker arms 15. The two connecting rods 14 are positioned opposite each other on both sides of the stick 12, and the connecting rods 14 and rocker arms 15 are connected one-to-one, that is, two connecting rods 14 and two rocker arms 15 are respectively provided with two pins 10.

[0047] This application does not limit the specific structure of the pump assembly 100. For example, the pump assembly 100 is an electric oil pump or a hydraulic oil pump used to provide lubricating oil, such as grease. The pump assembly 100 can be installed on one side of the excavator cab for easy replenishment of lubricating oil.

[0048] The distributor 300 is mainly used to precisely and quantitatively distribute lubricant to each lubrication point of the pin 10, ensuring that each pin 10 receives an appropriate amount of lubrication, thus playing the role of quantitatively distributing lubricant. The distributor 300 can be a progressive distributor, and this embodiment does not limit this. The distributor 300 has an oil inlet 320 and an oil outlet 310. The oil inlet 320 is connected to the pump assembly 100, and the oil outlet 310 is connected to the lubrication point of the pin 10, such as the threaded interface of the pin 10.

[0049] The lubrication line 200 is used to connect the pump assembly 100 with the pin 10. The lubrication line 200 passes through the boom 11, stick 12, connecting rod 14, rocker arm 15 to the bucket 13 in sequence, thereby lubricating each pin 10.

[0050] The lubrication line 200 includes a main lubrication line 210 and a branch lubrication line 220. One end of the main lubrication line 210 is connected to the pump assembly 100, and the other end is connected to the distributor 300. The main lubrication line 210 is used to deliver lubricant, such as grease. The main lubrication line 210 is connected to the pin 10 via the branch lubrication line 220.

[0051] In some embodiments, branch lubrication pipes 220 are provided on both sides of the distributor 300. The branch lubrication pipes 220 are connected to threaded pipe joints on the rear support of the boom 11. The threaded pipe joints are connected to the pin 10 on the rear support of the boom 11 to achieve lubrication of the pin 10.

[0052] The detection component 400 includes a first detection element 410 and a second detection element 420. The first detection element 410 is used to detect the flow rate of the branch lubrication pipeline 220, and the second detection element 420 is used to detect the oil quantity in the oil cavity of the pin 10. It should be noted that this application does not limit the specific structure of the first detection element 410 and the second detection element 420. For example, the first detection element 410 can be a flow sensor, used to be installed on the branch lubrication pipeline 220. The flow sensor is used to determine the fault point of lubrication blockage. The second detection element 420 can be a level sensor, a pressure sensor, or an oil quantity sensor. It is used to detect whether the pin 10 is adequately lubricated. The pin 10 has an oil cavity, and the second detection element 420 is installed inside the oil cavity. The oil quantity sensor is used to detect the oil quantity in the oil cavity. When the oil quantity is greater than a preset value, the oil pump is controlled to stop supplying oil; when the oil quantity is less than or equal to the preset value, the oil pump is controlled to start, so that oil is input into the oil cavity.

[0053] The control component 500 is used to regulate the lubrication process. The start and stop of the pump assembly 100 are controlled by the control component 500. When insufficient oil is detected, the control component 500 will start the pump assembly 100 to replenish the oil; when abnormal flow is detected, the control component 500 will shut down the pump assembly 100. In some embodiments, the control component 500 is electrically connected to a display screen to display the flow rate of the branch lubrication line 220 detected by the first detection element 410 and the feedback error information on the display screen for direct observation.

[0054] In the automatic lubrication structure for pins in this embodiment, the pump assembly 100 provides lubricating oil, and the distributor 300 accurately distributes the lubricating oil input by the pump assembly 100 through the main lubrication pipeline 210 to each branch lubrication pipeline 220 to fully lubricate the pins 10 at each position. Through the cooperation of the distributor 300 and the lubrication pipelines 200, the second detection element 420 detects the oil level in the oil chamber of the pin 10, causing the pump assembly 100 to automatically start. The lubricating oil automatically lubricates each pin 10 through the lubrication pipelines 200 and the distributor 300, eliminating the need for manual start-up and providing convenience. Furthermore, the first detection element 410 detects the flow rate of the branch lubrication pipelines 220 to determine whether there is any blockage during the automatic lubrication process, ensuring normal lubrication operation. Therefore, the automatic lubrication structure for pins in this embodiment facilitates automatic lubrication of each pin 10.

[0055] In one possible implementation, the automatic lubrication structure for the pin in this application embodiment has a distributor 300 having multiple oil outlets 310 and at least one oil inlet 320. The oil inlet 320 is connected to the pump assembly 100 via the main lubrication pipeline 210, and each oil outlet 310 is connected to a corresponding branch lubrication pipeline 220.

[0056] For example, there are eight oil outlets 310 to correspond to the eight pins 10 of the excavator that need lubrication. Of course, if the number of oil outlets 310 is less than the number of pins 10 to be lubricated, a tee or cross pipe can be added to each branch lubrication line 220 to lubricate multiple pins 10. It should be noted that the distributor 300 facilitates lubrication of each pin 10.

[0057] In one possible implementation, the automatic lubrication structure for the pin shaft in this embodiment includes a main lubrication pipeline 210 comprising a plurality of first pipe fittings 211 and at least two second pipe fittings 212. The distributor 300 is connected to the pump assembly 100 through the first pipe fittings 211. One second pipe fitting 212 is arranged along the boom 11 of the excavator, and another second pipe fitting 212 is arranged along the stick 12 of the excavator. The two second pipe fittings 212 are connected to each other through the first pipe fittings 211.

[0058] Specifically, the second fitting 212 can be a bright tube, which is installed along the extension direction of the boom 11. The bright tube is mounted on the boom 11 by a pipe clamp. One end of the bright tube is connected to the distributor 300, and the other end is connected to the transition piece 213. The transition piece 213 facilitates the connection between the main lubrication line 210 and the branch lubrication line 220, and is also used to connect pipe interfaces of different materials, such as bright tubes and rubber hoses.

[0059] In one possible implementation, the automatic lubrication structure of the pin shaft in this embodiment of the application further includes a transition member 213 in the main lubrication pipeline 210. The transition member 213 is disposed at both ends of the second pipe 212 disposed along the boom 12 and is used to communicate with the branch lubrication pipeline 220.

[0060] The number of transition pieces 213 is not limited in this embodiment. For example, there are two transition pieces 213. One transition piece 213 is set on the boom 11 and the other transition piece 213 is set on the stick 12. The two transition pieces 213 are connected by a rubber hose.

[0061] In addition, a third transition piece 213 is provided at the end of the bright tube away from the boom 11. One end of the rubber hose is connected to the transition piece 213, and the other end is connected to the threaded pipe joints on the front support pin 10 of the stick, the middle support pin 10 of the stick, the pin 10 of the bucket and connecting rod, and the pin 10 of the rocker arm and connecting rod, respectively, so as to achieve lubrication of the four pins 10.

[0062] This application does not limit the specific structure of the first fitting 211 and the second fitting 212. The first fitting 211 is a flexible hose, and the second fitting 212 is a steel pipe. The first fitting 211 can be a rubber hose, which is easy to bend and provides a flexible transition.

[0063] In one possible implementation, the automatic lubrication structure for the pin shaft in this embodiment of the application further includes a pipe fastener 214 in the main lubrication pipeline 210. The pipe fastener 214 is used to connect to the second pipe fitting 212 so that the second pipe fitting 212 is fixed on the excavator.

[0064] The specific structure of the pipe fastener 214 is not limited in this application embodiment. For example, the pipe fastener 214 can be a pipe clamp to fit the shape of the second pipe 212 and fix the second pipe 212 on the boom 11 or the stick 12.

[0065] In one possible implementation, the automatic lubrication structure for the pin in this embodiment of the application has at least one branch lubrication pipe 220 provided with a three-way pipe 215, which is used to communicate with the pin 10.

[0066] For example, during the connection between the branch lubrication line 220 and the pin 10 between the rocker arm and the connecting rod, since there are two pins 10 between the rocker arm and the connecting rod, the lubrication line 200 is divided into two by a three-way pipe 215 to achieve connection with the two pins 10. The three-way pipe 215 facilitates the addition of new lubrication oil lines and allows for adjustments based on the actual number of pins 10 requiring lubrication.

[0067] One end of the branch lubrication pipe 220 is detachably connected to the threaded pipe joint of the pin 10. This detachable connection facilitates the replacement of the branch lubrication pipe 220 with a new one and makes maintenance easier.

[0068] In one possible implementation, the automatic lubrication structure for the pin in this application embodiment has a first detection element 410, which is a flow sensor, installed on the branch lubrication pipeline 220, and a second detection element 420, which is an oil quantity sensor, installed in the oil cavity of the pin 10.

[0069] A flow sensor is used to determine the fault point of lubrication blockage and is connected one-to-one with the branch lubrication pipe 220. It can promptly detect blockages in the branch lubrication pipe 220. When the flow rate of the branch lubrication pipe 220 is less than or equal to the preset flow rate value, the control component 500 sends an error message and controls the pump component 100 to shut down. The second detection element 420 can be an oil quantity sensor. It is used to detect whether the pin 10 is adequately lubricated. The pin 10 has an oil chamber, and the second detection element 420 is located in the oil chamber. The oil quantity sensor is used to detect the oil quantity in the oil chamber. When the oil quantity is greater than the preset oil quantity value, the oil pump is controlled to stop supplying oil. When the oil quantity is less than or equal to the preset oil quantity value, the oil pump is controlled to start, so as to input oil into the oil chamber.

[0070] On the other hand, this application provides an excavator, including: an excavator body and an automatic lubrication structure for the pin shaft as described in any of the above embodiments, disposed on the excavator body.

[0071] This application does not limit the type of excavator. For example, the excavator can be a large excavator, a medium excavator, or a small excavator, or a tracked excavator or a wheeled excavator, or a general-purpose excavator, a mining excavator, a marine excavator, or a special excavator, or it can be a front shovel excavator, a backhoe excavator, a dragline excavator, or a grab excavator. The embodiments of this application do not limit this.

[0072] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0073] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An automatic lubrication structure for a pin, characterized in that, include: Pump assembly (100); Distributor (300); The lubrication pipeline (200) includes at least one main lubrication pipeline (210) and multiple branch lubrication pipelines (220). One end of the main lubrication pipeline (210) is connected to the pump assembly (100), and the other end of the main lubrication pipeline (210) is connected to one end of each branch lubrication pipeline (220) through the distributor (300). The other end of each branch lubrication pipeline (220) is connected to the oil chamber of each pin (10) of the excavator. The detection assembly (400) includes a plurality of first detection elements (410) and a plurality of second detection elements (420). Each first detection element (410) is correspondingly connected to each of the branch lubrication pipelines (220) to detect the flow rate of the branch lubrication pipelines (220). Each second detection element (420) is correspondingly connected to each of the pins (10) to detect the amount of oil in the oil chamber of the pin (10). The control component (500) is electrically connected to the first detection element (410), the second detection element (420), and the pump assembly (100); The control component (500) is configured to control the pump assembly (100) to turn on when the amount of oil in the oil chamber of the pin (10) is less than or equal to a preset oil amount value, and to control the pump assembly (100) to turn off when the flow rate of the branch lubrication pipeline (220) is less than or equal to a preset flow rate value.

2. The automatic lubrication structure for pins according to claim 1, characterized in that, The distributor (300) has multiple oil outlets (310) and at least one oil inlet (320). The oil inlet (320) is connected to the pump assembly (100) via the main lubrication line (210), and each of the oil outlets (310) is connected to a corresponding branch lubrication line (220).

3. The automatic lubrication structure for pins according to claim 2, characterized in that, The main lubrication line (210) includes a plurality of first fittings (211) and at least two second fittings (212). The distributor (300) is connected to the pump assembly (100) through the first fittings (211). One second fitting (212) is arranged along the boom (11) of the excavator, and another second fitting (212) is arranged along the stick (12) of the excavator. The two second fittings (212) are connected to each other through the first fittings (211).

4. The automatic lubrication structure for pins according to claim 3, characterized in that, The main lubrication pipeline (210) also includes a transition piece (213), which is disposed at both ends of the second pipe (212) disposed along the boom (12), and the transition piece (213) is used to communicate with the branch lubrication pipeline (220).

5. The automatic lubrication structure for pins according to claim 3, characterized in that, The first fitting (211) is a flexible hose, and the second fitting (212) is a steel pipe.

6. The automatic lubrication structure for pins according to claim 3, characterized in that, The main lubrication pipeline (210) also includes a pipeline fastener (214), which is used to connect to the second pipe fitting (212) so that the second pipe fitting (212) is fixed on the excavator.

7. The automatic lubrication structure for pins according to any one of claims 1-5, characterized in that, At least one of the branch lubrication lines (220) is provided with a tee pipe (215) for communicating with the pin (10).

8. The automatic lubrication structure for pins according to any one of claims 1-5, characterized in that, One end of the branch lubrication pipeline (220) is detachably connected to the threaded pipe joint of the pin (10).

9. The automatic lubrication structure for pins according to any one of claims 1-5, characterized in that, The first detection element (410) is a flow sensor, which is installed on the branch lubrication pipeline (220), and the second detection element (420) is an oil quantity sensor, which is installed in the oil cavity of the pin (10).

10. An excavator, characterized in that, The invention includes an excavator body and an automatic lubrication structure for a pin as described in any one of claims 1-9, which is disposed on the excavator body.

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