A bushing for a power wheel loader work device

Abstract

The utility model discloses a kind of axle sleeve of electric wheel type loader working device, belong to electric loader technical field. Including: first axle sleeve, second axle sleeve and third axle sleeve connected on swing arm are connected on movable arm;First oil feeding cavity and multiple groups of first annular grooves are opened on the first axle sleeve, and the first oil feeding cavity is communicated with first annular groove;First pin shaft is connected in the first axle sleeve;When the first oil feeding cavity sends in butter to middle first annular groove, butter flows to the first annular groove of both sides through the gap between first axle sleeve and first pin shaft;By setting multiple annular grooves in first axle sleeve, second axle sleeve, third axle sleeve respectively, replace traditional single annular groove structure, significantly increase the storage capacity of butter in axle sleeve, effectively avoid dry grinding phenomenon, reduce the incidence of pin shaft and axle sleeve abnormal wear, abnormal sound, fracture and other faults, prolong the maintenance cycle and service life of working device, improve the operation stability of loader.

Description

Technical Field

[0001] This utility model relates to the field of lubrication technology for axle sleeves of electric loaders, and in particular to a axle sleeve for a working device of an electric wheel loader. Background Technology

[0002] Electric wheel loaders, as core equipment in the construction machinery field, are widely used in mining, infrastructure, agriculture, and other scenarios. The reliability of their working device directly determines the overall operating efficiency and service life of the machine. The working device achieves actions such as boom lifting and bucket tilting through the hinge of multiple sets of bushings and pins. The lubrication status of the bushings and pins is a key factor in ensuring the stable operation of the hinge structure.

[0003] Existing electric wheel loader bushings generally employ a lubrication structure design of "single annular groove + single / double figure-eight spiral groove": the single annular groove stores lubricating grease, while the figure-eight spiral groove guides the grease from the annular groove to the contact area between the bushing and the pin. However, this structure has certain shortcomings in practical applications and cannot meet the high-intensity, long-term operation requirements of loaders.

[0004] Limited by the storage capacity of the single annular groove, the amount of grease that can be retained in the bushing is limited, requiring frequent manual replenishment to maintain lubrication. If the grease is not replenished at the prescribed intervals due to high work intensity or untimely maintenance, the grease in the bushing will be quickly consumed, preventing the formation of an effective oil film in the contact area between the bushing and the pin, resulting in dry running without lubrication. Long-term dry running will lead to abnormal wear of the pin and bushing, producing harsh noises during operation, and in severe cases, even causing the pin to break and deformation of connected structural components such as the boom and rocker arm, directly causing the loader to stop and potentially resulting in huge economic losses.

[0005] The complex structure of the figure-eight spiral groove requires precision milling or grinding using specialized CNC machining equipment. This not only demands high-level processing technology but also results in long processing cycles and difficulty in controlling the scrap rate, hindering the large-scale production and cost control of electric wheel loaders. Furthermore, the oil guiding path of the figure-eight spiral groove relies on the guiding effect of the spiral structure. During the relative rotation of the bushing and pin, grease tends to accumulate at the end of the spiral groove, while the two ends of the bushing and some areas not covered by the spiral groove cannot receive sufficient grease, forming lubrication dead zones. The oil film thickness on the contact surface between the bushing and pin in these lubrication dead zones is insufficient, and the local wear rate is much higher than in other areas, which may shorten the overall service life of the bushing. Utility Model Content

[0006] The purpose of this utility model is to solve the problems mentioned in the background art and to provide a bushing for the working device of an electric wheel loader.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A bushing for an electric wheel loader working device includes: a first bushing connected to the boom, a second bushing, and a third bushing connected to the rocker arm;

[0009] The first bushing has a first oil delivery chamber and multiple sets of first annular grooves, and the first oil delivery chamber is connected to the first annular grooves.

[0010] A first pin is connected to the first bushing;

[0011] When the first oil delivery chamber feeds grease into the middle first annular groove, the grease flows through the gap between the first bushing and the first pin to the first annular grooves on both sides.

[0012] Preferably, a second pin is connected to the second bushing, a second oil delivery chamber is provided in the second pin, and multiple sets of second annular grooves are provided on the inner side of the second bushing, and the second oil delivery chamber is connected to the second annular grooves.

[0013] When the second oil delivery chamber feeds grease into the middle second annular groove, the grease flows through the gap between the second bushing and the second pin to the second annular grooves on both sides.

[0014] Preferably, a third pin is connected to the third bushing, a third oil delivery chamber is provided on the rocker arm, and an oil delivery pipe is fixedly connected to the rocker arm. The oil delivery pipe is connected to the third oil delivery chamber. Multiple sets of third annular grooves are provided on the third bushing, and the third annular grooves are connected to the third oil delivery chamber.

[0015] The oil delivery pipe feeds grease into the middle third annular groove through the third oil delivery chamber, and the grease flows to the third annular grooves on both sides through the gap between the third bushing and the third pin.

[0016] Furthermore, a first rotating lip seal is fixedly connected inside the first bushing.

[0017] Furthermore, a second rotating lip seal is fixedly connected inside the second bushing.

[0018] Furthermore, a third rotating lip seal is fixedly connected inside the third bushing.

[0019] Compared with the prior art, the present invention provides a bushing for the working device of an electric wheel loader, which has the following advantages:

[0020] 1. This utility model significantly increases the grease storage capacity inside the bushings by setting multiple sets of annular grooves in the first, second, and third bushings, replacing the traditional single annular groove structure. During grease filling, the multiple annular grooves can store grease simultaneously, and the grease flows evenly between the annular grooves through the gap between the bushing and the pin, ensuring that the contact area between the bushing and the pin is fully covered by an oil film. Even if the grease filling interval is extended, the grease stored in the multiple annular grooves can still continuously provide lubrication to the contact area, effectively avoiding dry friction, reducing the incidence of abnormal wear, abnormal noise, and breakage of the pin and bushing, extending the maintenance cycle and service life of the working device, and improving the operational stability of the loader.

[0021] 2. This utility model achieves grease storage and uniform distribution directly by using multiple sets of annular grooves. The processing of the annular grooves can be completed by ordinary lathes or milling machines, which not only reduces the requirements of equipment and processes for bushing processing and shortens the processing cycle, but also reduces the scrap rate caused by insufficient machining accuracy of spiral grooves, thus effectively controlling the manufacturing cost of bushings.

[0022] 3. This utility model, through the lubrication path design of "oil delivery chamber - middle annular groove - gap - two side annular grooves", allows grease to spread evenly from the middle annular groove to the two side annular grooves under pressure, effectively eliminating the lubrication dead angles existing in traditional spiral grooves. This allows a continuous and uniform oil film to be formed on the contact surface between the bushing and the pin, avoiding accelerated wear caused by insufficient lubrication in local areas and further extending the service life of the bushing and the pin. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the working device of an electric wheel loader proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the connection structure between the first bushing and the boom proposed in this utility model;

[0025] Figure 3 The present invention provides a bushing for the working device of an electric wheel loader. Figure 2 Enlarged view of section A in the middle;

[0026] Figure 4 A cross-sectional view of the first bushing is provided for this utility model;

[0027] Figure 5 This is a schematic diagram of the connection structure between the third bushing and the rocker arm proposed in this utility model;

[0028] Figure 6 The present invention provides a bushing for the working device of an electric wheel loader. Figure 5 Enlarged view of section B;

[0029] Figure 7 This is a cross-sectional view of the third bushing proposed in this utility model;

[0030] Figure 8 This is a schematic diagram of the connection structure between the second bushing and the boom proposed in this utility model;

[0031] Figure 9 The present invention provides a bushing for the working device of an electric wheel loader. Figure 8 Enlarged view of section C;

[0032] Figure 10 This is a cross-sectional view of the second bushing proposed in this utility model.

[0033] In the diagram: 1. Working part; 101. Boom; 102. Rocker arm; 1021. Third oil delivery chamber; 103. Connecting rod; 2. First bushing; 201. First rotary lip seal; 202. First oil delivery chamber; 203. First pin; 204. First annular groove; 3. Third bushing; 301. Third rotary lip seal; 302. Oil delivery pipe; 303. Third pin; 304. Third annular groove; 4. Second bushing; 401. Second rotary lip seal; 402. Second oil delivery chamber; 403. Second pin; 404. Second annular groove. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] Example:

[0036] Reference Figures 1-4 A bushing for an electric wheel loader working device includes: a first bushing 2 and a second bushing 4 connected to the boom 101 and a third bushing 3 connected to the rocker arm 102.

[0037] The first bushing 2 is provided with a first oil delivery chamber 202 and multiple sets of first annular grooves 204, and the first oil delivery chamber 202 is connected to the first annular grooves 204.

[0038] The first bushing 2 is connected to the first pin 203;

[0039] When the first oil delivery chamber 202 delivers grease into the middle first annular groove 204, the grease flows through the gap between the first bushing 2 and the first pin 203 to the first annular grooves 204 on both sides.

[0040] Reference Figure 1In specific implementation, the boom 101 is connected to the rocker arm 102 via the connecting rod 103, and the boom 101, rocker arm 102 and connecting rod 103 together form the working part 1.

[0041] The first rotating lip seal 201 is fixedly connected inside the first bushing 2.

[0042] Two sets of first rotating lip seals 201 are symmetrically arranged to prevent the grease from leaking out from the side of the first bushing 2.

[0043] Reference Figures 1-4 In specific implementation, the external grease supply system is activated to deliver lubricating grease to the first oil delivery chamber 202 on the first bushing 2. Under pressure, the grease in the first oil delivery chamber 202 first flows into the middle first annular groove 204 connected to it. Under the guidance of continuous pressure and the gap between the first bushing 2 and the first pin 203, the grease in the middle first annular groove 204 slowly flows to the first annular grooves 204 on both sides.

[0044] During the flow process, the grease evenly fills each of the first annular grooves 204, and at the same time forms an initial oil film on the contact surface between the first bushing 2 and the first pin 203 to ensure the initial lubrication effect.

[0045] Once all the first annular grooves 204 are filled with grease and a complete oil film is formed on the contact surface between the first bushing 2 and the first pin 203, the external grease supply system stops supplying oil, and the first bushing 2 enters a continuous lubrication state. During the operation of the loader's working device, as the first pin 203 rotates, the grease continues to flow in the gap, constantly replenishing the worn oil film, thus achieving long-term lubrication of the contact area between the first bushing 2 and the first pin 203.

[0046] Reference Figure 1 , Figures 8-10 The second bushing 4 is connected to the second pin 403, the second pin 403 is provided with the second oil delivery chamber 402, and the inner side of the second bushing 4 is provided with multiple sets of second annular grooves 404, the second oil delivery chamber 402 is connected to the second annular grooves 404.

[0047] When the second oil delivery chamber 402 delivers grease into the middle second annular groove 404, the grease flows through the gap between the second bushing 4 and the second pin 403 to the second annular grooves 404 on both sides.

[0048] The second rotating lip seal 401 is fixedly connected inside the second bushing 4.

[0049] Two sets of second rotating lip seals 401 are symmetrically arranged to prevent the grease from leaking out from the side of the second bushing 4.

[0050] Reference Figure 1 , Figures 8-10In specific implementation, the lubricating grease is delivered to the second oil delivery chamber 402 opened in the second pin 403. The grease gradually accumulates in the second oil delivery chamber 402. Under pressure, the grease in the second oil delivery chamber 402 breaks through the contact gap between the second pin 403 and the second bushing 4 and first flows into the middle second annular groove 404 inside the second bushing 4, so that the middle second annular groove 404 is quickly filled with grease.

[0051] The grease in the middle second annular groove 404 diffuses to the second annular grooves 404 on both sides through the gap between the second bushing 4 and the second pin 403. During the diffusion process, the grease not only fills each second annular groove 404, but also forms a uniform oil film on the contact surface between the second bushing 4 and the second pin 403. The oil film covers all contact areas, with no dead corners for lubrication, ensuring that every contact point is lubricated by grease.

[0052] When all the second annular grooves 404 inside the second bushing 4 are filled with grease and the oil film on the contact surface is stable, the oil supply stops. When the loader's working device is in operation, the rotation of the second pin 403 causes the grease to circulate in the gap, continuously providing lubrication to the contact area, reducing wear, and ensuring the normal operation of the second bushing 4 and the second pin 403.

[0053] Reference Figure 1 , Figures 5-7 The third bushing 3 is connected to the third pin 303, the rocker arm 102 is provided with the third oil delivery chamber 1021, and the rocker arm 102 is fixedly connected with the oil delivery pipe 302, which is connected to the third oil delivery chamber 1021. The third bushing 3 is provided with multiple sets of third annular grooves 304, which are connected to the third oil delivery chamber 1021.

[0054] The oil supply pipe 302 delivers grease into the middle third annular groove 304 through the third oil supply chamber 1021. The grease flows to the third annular grooves 304 on both sides through the gap between the third bushing 3 and the third pin 303.

[0055] The third bushing 3 is fixedly connected to the third rotating lip seal 301.

[0056] Two sets of third rotating lip seals 301 are symmetrically arranged to prevent the grease from leaking out from the side of the third bushing 3.

[0057] Reference Figure 1 , Figures 5-7 In specific implementation, the oil supply pipe 302 delivers lubricating grease to the third oil supply chamber 1021 on the rocker arm 102. The grease in the third oil supply chamber 1021 is guided into the middle third annular groove 304 on the third bushing 3, and the grease is quickly filled in the annular groove.

[0058] Under pressure, the grease in the middle third annular groove 304 flows along the gap between the third bushing 3 and the third pin 303 to the third annular grooves 304 on both sides. During the flow, the grease is evenly distributed in each third annular groove 304, and at the same time, a continuous and uniform oil film is formed on the contact surface of the third bushing 3 and the third pin 303. The oil film must completely cover the contact area to ensure that there is no leakage in lubrication.

[0059] Once all the third annular grooves 304 are filled with grease and the oil film on the contact surface reaches a stable state, the oil supply pipe 302 stops supplying oil to the third oil supply chamber 1021. When the loader's working device is running, as the rocker arm 102 swings and the third pin 303 rotates, the grease continuously circulates in the gap between the third bushing 3 and the third pin 303, constantly replenishing and renewing the oil film, thereby achieving long-term effective lubrication of the contact area between the third bushing 3 and the third pin 303, reducing component wear, and extending service life.

[0060] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bushing for the working device of an electric wheel loader, characterized in that, include: A first bushing (2) and a second bushing (4) are connected to the boom (101), and a third bushing (3) is connected to the rocker arm (102); The first bushing (2) is provided with a first oil delivery chamber (202) and multiple sets of first annular grooves (204), and the first oil delivery chamber (202) is connected to the first annular grooves (204); The first bushing (2) is connected to a first pin (203); When the first oil delivery chamber (202) delivers grease into the middle first annular groove (204), the grease flows through the gap between the first bushing (2) and the first pin (203) to the first annular grooves (204) on both sides.

2. The bushing of the working device of an electric wheel loader according to claim 1, characterized in that, The second bushing (4) is connected to a second pin (403), and the second pin (403) is provided with a second oil delivery chamber (402). The inner side of the second bushing (4) is provided with multiple sets of second annular grooves (404), and the second oil delivery chamber (402) is connected to the second annular grooves (404). When the second oil delivery chamber (402) delivers grease into the middle second annular groove (404), the grease flows through the gap between the second bushing (4) and the second pin (403) to the second annular grooves (404) on both sides.

3. The bushing of the working device of an electric wheel loader according to claim 1, characterized in that, The third bushing (3) is connected to a third pin (303), the rocker arm (102) is provided with a third oil delivery chamber (1021), and an oil delivery pipe (302) is fixedly connected to the rocker arm (102). The oil delivery pipe (302) is connected to the third oil delivery chamber (1021). The third bushing (3) is provided with multiple sets of third annular grooves (304), and the third annular grooves (304) are connected to the third oil delivery chamber (1021). The oil delivery pipe (302) delivers grease into the middle third annular groove (304) through the third oil delivery chamber (1021), and the grease flows to the third annular grooves (304) on both sides through the gap between the third bushing (3) and the third pin (303).

4. The bushing of the working device of an electric wheel loader according to claim 1, characterized in that, The first rotating lip seal (201) is fixedly connected inside the first bushing (2).

5. The bushing of the working device of an electric wheel loader according to claim 2, characterized in that, The second bushing (4) is fixedly connected to a second rotating lip seal (401).

6. The bushing of the working device of an electric wheel loader according to claim 3, characterized in that, The third bushing (3) is fixedly connected to a third rotating lip seal (301).

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