Central pivot lubrication seal for electric shovel

Abstract

The present application relates to the technical field of electric shovel sealing, and particularly relates to a lubricating sealing device for a central pivot of an electric shovel, which comprises a mounting unit, a dismounting unit and a sealing unit, wherein the mounting unit comprises a mounting ring with a cavity and an open bottom end; the dismounting unit comprises a plurality of first notches arranged on the inner wall of the mounting ring and a dismounting assembly arranged in the cavity of the mounting ring and penetrating through the first notches; and the sealing unit comprises a plurality of second notches arranged on the inner wall of the mounting ring and a sealing assembly arranged in the cavity of the mounting ring and penetrating through the second notches. The lubricating sealing device for the central pivot of the electric shovel is installed in the mounting groove at the connection between the central pivot and the mounting ring. When the sealing ring is replaced, the sealing ring is taken out of the mounting ring through the dismounting assembly, and the new sealing ring is installed and sealed through the sealing assembly, so that the whole skeleton oil seal does not need to be knocked out for replacement.

Description

Technical Field

[0001] The present invention relates to the field of electric shovel sealing technology, and more particularly to a lubrication and sealing device for the central pivot of an electric shovel. Background Technology

[0002] In the initial stage of operation, the gap between the central pivot and the copper sleeve was small, allowing lubricating oil to be stored in the oil passage, resulting in good lubrication. However, as the operating time increased, the gap between the central pivot and the copper sleeve widened, causing lubricating oil to flow directly from the bottom of the reloading platform and preventing its storage. Consequently, the upper spherical gasket and other components did not receive lubrication. Currently, a skeleton oil seal mounting groove is machined at the connection point between the bottom of the rotary platform and the China Tobacco Corporation's pivot, and a skeleton oil seal is installed for sealing.

[0003] The sealing rings of skeleton oil seals age over time, leading to poor sealing performance and requiring regular replacement and maintenance. Existing skeleton oil seal replacement methods require removing the lubricating oil first, then hammering the entire seal out from the inside, making the replacement process cumbersome. Therefore, this invention provides a lubrication and sealing device for the central pivot of an electric shovel. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problem that replacing the oil seal of the existing electric shovel skeleton requires smashing the entire oil seal out from the inside before replacing it, this invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a lubrication and sealing device for the central pivot of an electric shovel, the purpose of which is to provide a skeleton oil seal that facilitates the replacement of the sealing ring.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a lubrication and sealing device for the central pivot of an electric shovel, comprising: an installation unit including an installation ring having an internal cavity and an open bottom end; a disassembly unit including a plurality of first slots disposed on the inner wall of the installation ring, and a disassembly assembly disposed inside the installation ring and passing through the first slots; and a sealing unit including a plurality of second slots disposed on the inner wall of the installation ring, and a sealing assembly disposed inside the installation ring and passing through the second slots.

[0008] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, the disassembly assembly includes a first lead screw rotatably disposed at the top end of the mounting ring, a first slide rod disposed at the top end of the mounting ring, and a disassembly part disposed on the first lead screw and slidingly passing through the first slide rod.

[0009] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, the sealing assembly includes a second lead screw rotatably disposed at the top end of the mounting ring, a second slide rod disposed at the top end of the mounting ring, and a sealing part disposed on the second lead screw and slidingly passing through the second slide rod.

[0010] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, it further includes a drive assembly, wherein the threads of the first lead screw and the second lead screw are opposite, and the drive assembly includes gears disposed at the bottom ends of the first lead screw and the second lead screw, a gear ring rotatably disposed in the mounting ring and meshing with a plurality of the gears, and a drive rod disposed on the gear ring.

[0011] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, the disassembly part includes a first slider disposed on the first lead screw and the first slide rod, a support rod hinged to the end of the first slider and passing through the first slot, a first elastic member disposed between the support rod and the first slider, a spike disposed at the top of the support rod, and a plurality of limiting strips elastically disposed on the side of the spike.

[0012] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, the sealing part includes: a second slider disposed on the second lead screw and the second slide bar; a support block hinged to the end of the second slider and passing through the second slot; a limiting block disposed at the bottom end of the second slider and abutting against the support block; a second elastic member disposed between the limiting block and the support block; a push plate elastically disposed at the top of the support block; and a cutting blade disposed on the support block.

[0013] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, wherein: the top of the inner side of the mounting ring is provided with a sealing area protruding inward.

[0014] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, wherein: the inner side of the mounting ring is provided with an outwardly protruding arc-shaped misalignment area.

[0015] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, a dustproof area with an inward protrusion is provided on the inner side of the mounting ring and below the misalignment area.

[0016] As a preferred embodiment of the electric shovel central pivot lubrication and sealing device of the present invention, it further includes a dustproof component, which includes a first dustproof plate disposed at the bottom end of the sealing component and abutting against both sides of the second groove, a plurality of movable blocks slidably disposed in the mounting ring, and a second dustproof plate elastically disposed on the movable blocks and cooperating with the first groove.

[0017] The beneficial effects of this invention are: by installing the mounting ring in the mounting groove at the pivot connection of the tobacco plant, when replacing the sealing ring, the sealing ring can be removed from the mounting ring by disassembling the assembly, and a new sealing ring can be installed by the sealing assembly to seal, without having to smash out the entire skeleton oil seal for replacement. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the lubrication and sealing device for the central pivot of the electric shovel of the present invention.

[0019] Figure 2 This is a cross-sectional view of the mounting ring structure of the central pivot lubrication and sealing device of the electric shovel of the present invention.

[0020] Figure 3 This is a schematic diagram of the disassembly section of the lubrication and sealing device for the central pivot of the electric shovel of the present invention.

[0021] Figure 4 This is a schematic diagram of the sealing part of the lubrication and sealing device for the central pivot of the electric shovel of the present invention.

[0022] Figure 5 This is a schematic diagram of the moving block structure of the central pivot lubrication and sealing device of the electric shovel of the present invention. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0027] Example 1 Reference Figure 1-2 This invention provides a lubrication and sealing device for the central pivot of an electric shovel, comprising a mounting unit 100, including a mounting ring 101 with an internal cavity and an open bottom. The outer wall of the mounting ring 101 has a rubber layer, and a groove is machined at the connection point between the bottom of the shovel's rotating platform and the central pivot. The mounting ring 101 is installed in the groove as an oil seal support. The shaft of the rotating platform passes through the mounting ring 101, and a sealing ring is installed between the mounting ring 101 and the shaft for sealing. The inner top of the mounting ring 101 has a sealing area 101a protruding inward. Moving the sealing ring to the sealing area 101a causes the sealing ring to contact the sealing area 101a and the shaft, eliminating the gap between the sealing area 101a and the shaft, thus achieving a seal.

[0028] The disassembly unit 200 includes a plurality of first slots 201 disposed on the inner wall of the mounting ring 101, and a disassembly assembly 202 disposed inside the mounting ring 101 and passing through the first slots 201; wherein the disassembly assembly 202 can be made of a hooked needle, which passes through the sealing ring to hook it out of the mounting ring 101 for disassembly. The sealing unit 300 includes a plurality of second slots 301 disposed on the inner wall of the mounting ring 101 and a sealing component 302 disposed inside the mounting ring 101 and passing through the second slots 301. The sealing component 302 may be composed of a push block that slides on the mounting ring 101. The first slots 201 and the second slots 301 are interlocked. By fitting the sealing ring onto the shaft, the push block pushes the sealing ring to the sealing area 101a to abut against the shaft, thereby achieving a seal.

[0029] During use, when replacing the sealing ring, first use the disassembly component 202 to remove the old sealing ring, then put on the new sealing ring, and use the sealing component 302 to send the new sealing ring to the sealing area 101a for fixing, thus sealing the shaft.

[0030] Example 2 Reference Figure 1-4 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the disassembly assembly 202 includes a first lead screw 202a rotatably disposed at the top end of the mounting ring 101, a first slide bar 202b disposed at the top end of the mounting ring 101, and a disassembly part 202c disposed on the first lead screw 202a and slidingly passing through the first slide bar 202b. The disassembly part 202c includes a first slider 202c-1 disposed on the first lead screw 202a and the first slide rod 202b. The first slider 202c-1 is threadedly connected to the first lead screw 202a and slides through the first slide rod 202b. A support rod 202c-2 is hinged to the end of the first slider 202c-1 and passes through the first slot 201. A first elastic element 202c-3 is disposed between the support rod 202c-2 and the first slider 202c-1. The first elastic element 202c-3 can be a spring or metal. The support rod 202c-2 has a spike 202c-4 made of a spring and disposed at the top of the spike 202c-4, and a plurality of limiting strips 202c-5 elastically disposed on the side of the spike 202c-4. The limiting strips 202c-5 are slidably inserted into the spike 202c-4 and are connected to the spike 202c-4 by springs. The limiting strips 202c-5 are triangularly inserted into the spike 202c-4. The first slider 202c-1 is provided with a limiting rod that limits the downward rotation of the support rod 202c-2, so that the spike 202c-4 remains vertical when in contact with the old sealing ring. When the first slider 202c-1 drives the support rod 202c-2 and the spike 202c-4 to contact and pass through the old sealing ring, it will squeeze the limiting strip 202c-5, so that the limiting strip 202c-5 is located in the spike 202c-4 and passes through the old sealing ring smoothly. After passing through the sealing ring, the limiting strip 202c-5 pops out and abuts against the old sealing ring. When the first slider 202c-1 moves downward, the old sealing ring is pulled off by the limiting strip 202c-5. The sealing assembly 302 includes a second lead screw 302a rotatably disposed at the top end of the mounting ring 101, a second slide bar 302b disposed at the top end of the mounting ring 101, and a sealing part 302c disposed on the second lead screw 302a and slidingly passing through the second slide bar 302b; The sealing part 302c includes a second slider 302c-1 disposed on the second lead screw 302a and the second slide rod 302b. The second slider 302c-1 is threadedly connected to the second lead screw 302a and slidably connected to the second slide rod 302b. A support block 302c-2 is hinged to the end of the second slider 302c-1 and passes through the second slot 301. A support block 302c-2 is disposed at the bottom end of the second slider 302c-1 and is connected to the support block 302c-1. 2. A limiting block 302c-3 that abuts against each other; a second elastic member 302c-4 disposed between the limiting block 302c-3 and the support block 302c-2, the second elastic member 302c-4 may be made of a spring or a metal sheet; a push plate 302c-5 elastically disposed at the top of the support block 302c-2, the push plate 302c-5 and the support plate are connected by a spring; and a cutting blade 302c-6 disposed on the support block 302c-2. When installing a new sealing ring, the new sealing ring is pushed to squeeze the support plate, which pulls the second elastic element 302c-4. After passing through the support plate and the push plate 302c-5, the second elastic element 302c-4 rebounds, causing the support plate limiting block 302c-3 to abut against it. The second slider 302c-1 moves to drive the push plate 302c-5 to send the new sealing ring into the sealing area 101a.

[0031] It also includes a drive assembly 303, wherein the threads of the first lead screw 202a and the second lead screw 302a are opposite, and the drive assembly 303 includes a gear 303a disposed at the bottom end of the first lead screw 202a and the second lead screw 302a, a gear ring 303b rotatably disposed in the mounting ring 101 and meshing with a plurality of gears 303a, and a drive rod 303c disposed on the gear ring 303b; The first slider 202c-1 and the second slider 302c-1 are initially located at the ends of the first lead screw 202a and the second lead screw 302a, respectively, and are distributed on different sides. Meanwhile, the second slider 302c-1 is located at the top and in contact with the sealing ring. Moving the drive rod 303c can drive the gear ring 303b to rotate, which in turn drives multiple gears 303a to rotate, thereby driving the first lead screw 202a and the second lead screw 302a to rotate, thus controlling the movement of the first slider 202c-1 and the second slider 302c-1.

[0032] The inner side of the mounting ring 101 is provided with an outwardly protruding arc-shaped misalignment area 101b; When replacing the sealing ring, the toothed ring 303b is moved to lower the second slider 302c-1 and the push plate 302c-5. The first slider 202c-1 and the spike 202c-4 rise to contact and penetrate the old sealing ring. Then, the new sealing ring is put on. When the old sealing ring moves downward with the first slider 202c-1 and the new sealing ring rises with the second slider 302c-1, when they contact the misalignment zone 101b, the new sealing ring will squeeze the support rod 202c-2, pushing the old sealing ring outward into the misalignment zone 101b. At the same time, the push is quick and elastic. When the new sealing ring reaches the top of the misalignment zone 101b, the old sealing ring enters the misalignment zone 101b. The old sealing ring, the new sealing ring and the shaft make contact and seal, which can prevent the oil of the rotary platform from leaking out in a large area. At the same time, after the new sealing ring passes through the misalignment zone 101b, the old sealing ring will contact the cutting blade 302c-6 and be cut off, and then be successfully removed.

[0033] The remaining structure is the same as that in Example 1.

[0034] During use, first rotate the gear ring 303b, which drives the first lead screw 202a and the second lead screw 302a to rotate, causing the spike 202c-4 to rise and pierce the old sealing ring. At the same time, the push plate 302c-5 is lowered. After the new sealing ring is put on, the gear ring 303b is reversed to lower the spike 202c-4 and raise the push plate 302c-5. The old sealing ring and the new sealing ring meet and intersect in the misalignment area 101b, which can prevent oil leakage. Then the old sealing ring is cut by the cutting blade 302c-6 and passes through the new sealing ring. When the new sealing ring reaches the top, it seals.

[0035] Example 3 Reference Figure 1-5 This is the third embodiment of the present invention, which differs from the second embodiment in that: an inwardly protruding dustproof area 101c is provided on the inner side of the mounting ring 101 and below the misalignment area 101b. When the old sealing ring, after being cut, falls into the dustproof area 101c and gets stuck between the dustproof area 101c and the shaft as the spikes 202c-4 move, due to the aging and lack of elasticity of the old sealing ring, it cannot fill the gap between the mounting ring and the shaft when it leaves the sealing area 101a. At this time, the dustproof area... When zone 101c engages with the old seal ring, it eliminates the gap between the shaft and the mounting ring 101, providing dust protection. At this time, the new seal ring reaches the top. When replacing the seal ring again, first lower the spike 202c-4. Then, the second slider 302c-1 continues to move upward, which will squeeze the elastically connected push plate 302c-5 until the spike 202c-4 drives the old seal ring away from the mounting ring 101. After removing the broken old seal ring, it rises again to remove the old seal ring at the top for replacement.

[0036] It also includes a dustproof component 102, which includes a first dustproof plate 102a disposed at the bottom end of the sealing component 302 and abutting against both sides of the second slot 301, a plurality of movable blocks 102b slidably disposed in the mounting ring 101, a slide rail provided on the mounting ring 101 for the movable blocks 102b to slide and engage, and a second dustproof plate 102c elastically disposed on the movable blocks 102b and cooperating with the first slot 201. The second dustproof plate 102c is connected to the movable blocks 102b by a spring. When the old sealing ring, after being cut off, falls into the dustproof area 101c and gets stuck between the dustproof area 101c and the shaft as the spike 202c-4 moves, the gap between the shaft and the mounting ring 101 is eliminated to prevent dust. At the same time, the second slider 302c-1 drives the second dustproof plate 102c to close the second slot 301 and contact the old sealing ring to prevent dust. Simultaneously, the moving block 102b is controlled to move, so that the first dustproof plate 102a moves to the outside of the first slot 201. The elastically set first dustproof plate 102a is inserted into the first slot 201 and contacts the old sealing ring to prevent dust and slow down the erosion and oxidation of the new sealing ring.

[0037] The remaining structure is the same as that in Example 2.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A lubrication and sealing device for the central pivot of an electric shovel, characterized in that: include, The mounting unit (100) includes a mounting ring (101) with an internal cavity and an open bottom. The disassembly unit (200) includes a plurality of first slots (201) disposed on the inner wall of the mounting ring (101), and a disassembly assembly (202) disposed inside the mounting ring (101) and passing through the first slots (201); and, The sealing unit (300) includes a plurality of second slots (301) disposed on the inner wall of the mounting ring (101) and a sealing assembly (302) disposed inside the mounting ring (101) and passing through the second slots (301). The disassembly assembly (202) includes a first lead screw (202a) rotatably disposed at the top of the mounting ring (101), a first slide bar (202b) disposed at the top of the mounting ring (101), and a disassembly part (202c) disposed on the first lead screw (202a) and slidingly passing through the first slide bar (202b). The sealing assembly (302) includes a second lead screw (302a) rotatably disposed at the top end of the mounting ring (101), a second slide rod (302b) disposed at the top end of the mounting ring (101), and a sealing part (302c) disposed on the second lead screw (302a) and slidingly passing through the second slide rod (302b). The disassembly part (202c) includes a first slider (202c-1) disposed on the first lead screw (202a) and the first slide bar (202b), a support rod (202c-2) hinged to the end of the first slider (202c-1) and passing through the first slot (201), a first elastic member (202c-3) disposed between the support rod (202c-2) and the first slider (202c-1), a spike (202c-4) disposed at the top of the support rod (202c-2), and a plurality of limiting strips (202c-5) elastically disposed on the side of the spike (202c-4). The sealing part (302c) includes a second slider (302c-1) disposed on the second lead screw (302a) and the second slide bar (302b), a support block (302c-2) hinged to the end of the second slider (302c-1) and passing through the second slot (301), a limiting block (302c-3) disposed at the bottom end of the second slider (302c-1) and abutting against the support block (302c-2), a second elastic member (302c-4) disposed between the limiting block (302c-3) and the support block (302c-2), a push plate (302c-5) elastically disposed at the top of the support block (302c-2), and a cutting blade (302c-6) disposed on the support block (302c-2).

2. The electric shovel central pivot lubrication and sealing device according to claim 1, characterized in that: It also includes a drive assembly (303), wherein the threads of the first lead screw (202a) and the second lead screw (302a) are opposite in direction. The drive assembly (303) includes a gear (303a) disposed at the bottom end of the first lead screw (202a) and the second lead screw (302a), a gear ring (303b) rotatably disposed in the mounting ring (101) and meshing with a plurality of gears (303a), and a drive rod (303c) disposed on the gear ring (303b).

3. The electric shovel central pivot lubrication and sealing device according to any one of claims 1 to 2, characterized in that: The mounting ring (101) has a sealing area (101a) that protrudes inward at the top inner side.

4. The lubrication and sealing device for the central pivot of an electric shovel according to any one of claims 1 to 2, characterized in that: The inner side of the mounting ring (101) is provided with an outwardly protruding arc-shaped misalignment area (101b).

5. The electric shovel central pivot lubrication and sealing device according to claim 4, characterized in that: The mounting ring (101) has an inwardly protruding dustproof area (101c) located inside and below the misalignment area (101b).

6. The electric shovel central pivot lubrication and sealing device according to claim 5, characterized in that: It also includes a dustproof assembly (102), which includes a first dustproof plate (102a) disposed at the bottom end of the sealing assembly (302) and abutting against both sides of the second slot (301), a plurality of movable blocks (102b) slidably disposed in the mounting ring (101), and a second dustproof plate (102c) elastically disposed on the movable blocks (102b) and cooperating with the first slot (201).

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