Excavator accessory puller with long service life

Abstract

The utility model discloses a long-life excavator accessory horse puller, which belongs to the technical field of excavator accessories, and comprises a main body and a shaft sleeve, the main body is provided with a grease containing area and two lubricating areas, the grease containing area and the two lubricating areas are coaxially arranged, the shaft sleeve can be contained in the lubricating areas to rotate along the inner wall of the shaft sleeve, and the inner diameter of the main body in the grease containing area is smaller than that of the lubricating areas. A plurality of first guide parts are formed on the main body, channels for communicating the first guide parts with the lubricating area are reserved in the grease cleaning rings, and the maximum diameter of the channels is smaller than a gap between the shaft sleeve and the main body. According to the long-service-life excavator accessory horse puller, sand mixed in lubricating grease is screened through the channel, so that large sand particles are not prone to being squeezed into the space between the shaft sleeve and the main body, especially the space between the shaft sleeve and the inner wall of the lubricating area, and therefore the shaft sleeve and an anti-corrosion coating coated on the surface of the lubricating area are effectively protected.

Description

Technical Field

[0001] This utility model relates to the field of excavator parts technology, specifically a long-life excavator part, a horse head. Background Technology

[0002] The boom arm, also known as the boom tie rod, is a tie rod installed on an excavator to connect the end of the boom to the bucket. The bucket, drill bit, and other accessories are usually connected to the bushing in the boom arm using pins. Therefore, it is necessary to maintain the connection while also being able to move flexibly relative to the bucket. Before each operation, a sufficient amount of grease is injected into the boom arm.

[0003] In complex operations, excavators often need to replace the parts connected to the horse head multiple times. Since the horse head has enough space to store grease, in most cases, only a small amount of grease needs to be injected after each part replacement to achieve effective lubrication.

[0004] However, due to the high dust levels in open-air operations, sand particles can easily enter the horse head after it is separated from the accessories. The surfaces of the bushing and the horse head that come into contact with each other are prone to abrasive wear due to the sand particles, which can easily wear down the corrosion-resistant coating on the surfaces of the horse head and the bushing, thus reducing the service life of the horse head.

[0005] To address the aforementioned issues, a long-life excavator accessory, the horse head, is proposed. Utility Model Content

[0006] The purpose of this utility model is to solve the problems in the prior art by proposing a long-life excavator accessory, the horse head.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a long-life excavator accessory horse head, comprising a main body and a bushing, the main body having a coaxially arranged grease-holding area and two lubrication areas, both of which can accommodate the bushing to rotate against their inner walls, the inner diameter of the main body in the grease-holding area being smaller than the inner diameter of the lubrication area, a grease-removing ring being provided on the side of the main body near the grease-holding area, which can be positioned relative to the main body, the main body having a plurality of first guide portions formed in the grease-holding area for smooth transition between the inner wall of the grease-holding area and the inner wall of the lubrication area, the grease-removing ring having a channel connecting the first guide portions and the lubrication area, the maximum diameter of the channel being smaller than the gap between the bushing and the main body.

[0008] The present invention is further configured such that: the end of the outer periphery of the bushing near the degreasing ring has a constricted structure, and a second guide portion is formed at the end of the constricted structure away from the degreasing ring, which surrounds the bushing; the second guide portion smoothly transitions between the periphery of the bushing and the surface of the constricted structure.

[0009] The present invention is further configured such that: a plurality of extrusion teeth close to the bushing are arranged around the side of the grease removal ring facing the bushing, the extrusion teeth are close to the surface of the constriction structure, and the channel is located between adjacent extrusion teeth and exposed outside the constriction structure.

[0010] The present invention is further configured such that: a plurality of interlocking blocks are fixedly provided on the side of the degreasing ring near the degreasing area, and the main body has an interlocking groove in the degreasing area for accommodating the interlocking blocks to slide into.

[0011] The present invention is further configured such that the fitting groove is aligned with the first guide portion.

[0012] The present invention is further configured such that: the surface of the main body is provided with a grease injection hole that communicates with the grease-retaining area.

[0013] In summary, this utility model has the following beneficial effects: by screening the sand particles mixed in the grease through the channel, large sand particles are less likely to squeeze into the space between the bushing and the main body, especially between the bushing and the inner wall of the lubrication area, thereby effectively protecting the anti-corrosion coating on the surface of the bushing and the lubrication area. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded view of the structure of this utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the bushing and grease removal ring of this utility model.

[0018] In the figure: 1. Main body; 11. Grease injection hole; 12. Grease-containing area; 13. Lubrication area; 14. Fitting groove; 15. First guide part; 2. Bushing; 21. Second guide part; 3. Grease removal ring; 31. Fitting block; 32. Extrusion teeth; 4. Channel. Detailed Implementation

[0019] 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. In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] A long-life excavator accessory, such as a horse head. Figures 1 to 4 As shown, the device includes a main body 1 and two bushings 2. One end of the main body 1 is provided with a grease-holding area 12 and two lubrication areas 13 arranged coaxially. The surface of the main body 1 is provided with a grease injection hole 11 that connects to the grease-holding area 12. The bushings 2 can rotate to fit the inner wall of the lubrication area 13. The outer diameter of the bushings 2 is smaller than the inner diameter of the lubrication area 13. The inner diameter of the main body 1 in the grease-holding area 12 is smaller than the inner diameter of the lubrication area 13. When the bucket is fixed to the horse head by inserting a shaft pin into the bushing 2, the bushings 2 and the lubrication area 13 are arranged coaxially. In order to allow the grease to enter the lubrication area 13 from the grease-holding area 12 in this state, the main body 1 is formed with several first guide portions 15 in the grease-holding area 12 to smoothly transition the inner wall of the grease-holding area 12 and the inner wall of the lubrication area 13. That is, the grease entering the gap between the bushings 2 and the lubrication area 13 mainly enters along several first guide portions 15.

[0021] In order to effectively filter sand particles in the grease, a grease-removing ring 3 is provided on the side of the lubrication area 13 near the grease-holding area 12 of the main body 1. The grease-removing ring 3 is made of high carbon steel and coated with a corrosion-resistant coating. Specifically, a number of interlocking blocks 31 are fixedly provided on the side of the grease-removing ring 3 near the grease-holding area 12. The main body 1 has an interlocking groove 14 in the grease-holding area 12 to accommodate the interlocking blocks 31 slidingly embedded. The grease-removing ring 3 has a channel 4 connecting the first guide part 15 and the lubrication area 13. The maximum diameter of the channel 4 is smaller than the gap between the bushing 2 and the main body 1. The sand particles mixed in the grease are screened through the channel 4, so that large sand particles are not easily squeezed into the space between the bushing 2 and the main body 1, especially between the bushing 2 and the inner wall of the lubrication area 13, thereby effectively protecting the anti-corrosion coating on the surface of the bushing 2 and the lubrication area 13.

[0022] Meanwhile, the first guide part 15 is also designed so that large sand particles will gradually accumulate in the space left by the first guide part 15 and the fitting groove 14 due to the agitation of the grease. When cleaning, simply remove the bushing 2 and the grease removal ring 3, and use a spoon or other tool to separate the grease near the first guide part 15 and the fitting groove 14 to clean these large sand particles. For easy cleaning, the fitting groove 14 and the first guide part 15 are aligned.

[0023] like Figures 1 to 4 As shown, in order to make it easier for the filtered grease to be guided into the gap between the lubrication area 13 and the bushing 2, the outer periphery of the bushing 2 near the grease removal ring 3 has a constricted structure, and a second guide portion 21 is formed around the bushing 2 at the end of the constricted structure away from the grease removal ring 3. The second guide portion 21 smoothly transitions the periphery of the bushing 2 and the surface of the constricted structure. Furthermore, the grease removal ring 3 is surrounded by several extrusion teeth 32 close to the bushing 2 on the side facing the bushing 2. The extrusion teeth 32 are close to the surface of the constricted structure, and the channels 4 are located between adjacent extrusion teeth 32 and exposed outside the constricted structure. That is, when grease is squeezed into the grease-containing area 12, the grease will be divided into several strips of grease by the extrusion teeth 32 as it enters the other side of the grease removal ring 3 through several channels 4. This allows the grease to be more evenly distributed to the surface between the bushing 2 and the lubrication area 13 during the injection process, thereby effectively reducing the occurrence of local grease overflow.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A long-life excavator accessory horse head, comprising a main body (1) and a bushing (2), wherein the main body (1) is provided with a coaxially arranged grease-receiving area (12) and two lubrication areas (13) that can accommodate the bushing (2) to rotate in contact with its inner wall, characterized in that: The inner diameter of the main body (1) in the grease-holding area (12) is smaller than the inner diameter of the lubrication area (13). The main body (1) has a grease-removing ring (3) on the side of the lubrication area (13) near the grease-holding area (12) that can be positioned relative to the main body (1). The main body (1) has several first guide portions (15) formed in the grease-holding area (12) for smooth transition between the inner wall of the grease-holding area (12) and the inner wall of the lubrication area (13). The grease-removing ring (3) has a channel (4) connecting the first guide portion (15) and the lubrication area (13). The maximum diameter of the channel (4) is smaller than the gap between the bushing (2) and the main body (1).

2. The long-life excavator accessory horse head according to claim 1, characterized in that: The bushing (2) has a constricted structure at one end near the degreasing ring (3) on its outer periphery, and a second guide portion (21) is formed at the other end of the constricted structure away from the degreasing ring (3) to surround the bushing (2). The second guide portion (21) smoothly transitions between the periphery of the bushing (2) and the surface of the constricted structure.

3. The long-life excavator accessory horse head according to claim 2, characterized in that: The grease-removing ring (3) is surrounded by a number of extrusion teeth (32) close to the bushing (2) on the side facing the bushing (2). The extrusion teeth (32) are close to the surface of the constriction structure. The channel (4) is located between adjacent extrusion teeth (32) and is exposed outside the constriction structure.

4. A long-life excavator accessory horse head according to claim 1, characterized in that: The degreasing ring (3) is fixedly provided with a number of interlocking blocks (31) on the side near the degreasing area (12), and the main body (1) is provided with an interlocking groove (14) in the degreasing area (12) for accommodating the interlocking blocks (31) to slide into.

5. A long-life excavator accessory horse head according to claim 4, characterized in that: The fitting groove (14) is aligned with the first guide portion (15).

6. A long-life excavator accessory horse head according to claim 1, characterized in that: The surface of the main body (1) is provided with a grease injection hole (11) that connects to the grease-containing area (12).

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