Self-lubricating sealing element for shaft
By designing a shaft self-lubricating seal with an oil reservoir, lubricating ball, and staggered sealing rings, the problem that existing shaft sealing devices cannot simultaneously seal, support, and self-lubricate has been solved. This achieves self-lubrication of the bearing and dust blocking, improving the cleanliness and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-10
AI Technical Summary
Existing shaft sealing devices cannot simultaneously achieve sealing, support, and self-lubrication functions, leading to problems such as dust ingress and lubricant leakage.
A self-lubricating seal for shafts was designed, comprising an oil reservoir, a lubricating ball, and staggered sealing rings. Self-lubrication is achieved through the rotation of the lubricating ball, and dust is blocked by a labyrinth structure. The support base and the cover are fixed by bolts to prevent radial and axial runout.
It achieves self-lubrication of bearings, prevents dust from entering, avoids lubricating oil leakage, simplifies equipment management, and improves the cleanliness and reliability of the equipment.
Smart Images
Figure CN224107568U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of self-lubricating sealing element, and particularly relates to a self-lubricating sealing element for shaft. BACKGROUND
[0002] The self-lubricating sealing element for shaft is a sealing device for preventing liquid, gas or dust from entering the interior of a machine or equipment from the rotating part of a shaft.
[0003] The existing shaft sealing device usually adopts a sealing ring, a shaft seal, an oil seal and a shaft end cover to realize the sealing of the shaft. CONTENT
[0004] The utility model discloses a self-lubricating sealing element for shaft, which can seal the shaft and the bearing, prevent dust from entering and lubricating oil from running out, and also has the function of a bearing seat.
[0005] To achieve the above object, the utility model provides the following technical scheme.
[0006] A self-lubricating sealing element for shaft, comprising a rear cover and a sealing lubricating element installed in a supporting base and a buckle cover.
[0007] The sealing lubricating element comprises an outer shell body, the outer shell body has an oil storage cavity inside, an oil filling nozzle is arranged at the top of the oil storage cavity, and the oil filling nozzle is threadedly connected with the outer shell body.
[0008] The lower end of the outer shell body on the side of the bearing is movably connected with a lubricating ball, the lubricating ball is arranged in the oil storage cavity, the lubricating ball further protrudes outside the outer shell body and is in contact with the rollers of the bearing.
[0009] According to the further technical scheme of the utility model, the inner side of the outer shell body further has a sealing cavity, a plurality of sealing check rings are arranged in the sealing cavity in a staggered manner, and the sealing cavity is integrally formed with the outer shell body.
[0010] According to the further technical scheme of the utility model, the bearing is assembled between the rear cover and the sealing lubricating element, and the bearing is installed on the transmission shaft in cooperation; the rear cover and the sealing lubricating element are fixedly connected through locking bolts, and the transmission shaft passes through the rear cover and the sealing lubricating element.
[0011] According to the further technical scheme of the utility model, the supporting base and the buckle cover are fixed through bolt locking at both ends.
[0012] According to the further technical scheme of the utility model, the supporting base and the buckle cover are fixed through bolt locking at both ends.
[0013] Compared with the prior art, the utility model has the beneficial effects that:
[0014] 1. The utility model discloses, at the friction of the roller when the bearing rotates, the lubricating ball in situ rotation will be made, the lubricating oil in the oil storage cavity will be taken out through the rotation of the lubricating ball at this moment, so that the lubrication of the bearing can be realized, when not working, the lubricating oil also will not overflow, thereby making the equipment more clean, also need not manual lubrication separately, thereby the personnel management of the cumbersome of the equipment is saved,
[0015] 2. The utility model discloses, the multiple sealing baffle rings that the sealed cavity is staggered and is formed a maze style, can have very high blocking effect to dust, can prevent the dust of outside from entering into the bearing,
[0016] 3. The utility model discloses, the support base and buckle cover are fixed through bolt up and down, can avoid the radial jumping or the situation of following rotation of the back cover and sealing lubricating part, the cross section shape of the groove cavity is identical with the external contour cross section shape of sealing lubricating part, can prevent the axial jumping of the back cover and sealing lubricating part. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.
[0018] Figure 2 It is the front view of the utility model Figure 1 .
[0019] Figure 3 It is the A-A section view of the utility model Figure 2 .
[0020] Figure 4 It is the B-B section view of the utility model Figure 2 .
[0021] Figure 5 It is the internal structure schematic diagram of the sealing lubricating part in the utility model.
[0022] Figure 6 It is the split structure schematic diagram of the utility model Figure 1 .
[0023] Figure 7 It is another visual angle schematic diagram of the utility model Figure 6 .
[0024] Figure 8 It is the local enlarged schematic diagram of the utility model Figure 3 .
[0025] In the figure: 1 - support base, 2 - buckle cover, 3 - bearing, 4 - transmission shaft, 5 - rear cover, 6 - locking bolt, 7 - sealing lubricating part;
[0026] 71 - outer shell, 72 - oil storage cavity, 73 - oil injection nozzle, 74 - sealing cavity, 75 - lubricating ball. DETAILED DESCRIPTION
[0027] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0028] Please refer to Figures 1-8 In the embodiments of the utility model, a self-lubricating sealing part for shaft comprises a rear cover 5 and a sealing lubricating part 7 installed in a support base 1 and a buckle cover 2.
[0029] The sealing lubricating part 7 comprises an outer shell 71, which has an oil storage cavity 72 inside, and an oil injection nozzle 73 is arranged on the top of the oil storage cavity 72 and is threadedly connected with the outer shell 71.
[0030] The outer shell 71 is movably connected with a lubricating ball 75 at the lower end of the side of the bearing 3, the lubricating ball 75 is arranged in the oil storage cavity 72, and the lubricating ball 75 also protrudes outside the outer shell 71 and is in contact with the rollers of the bearing 3.
[0031] By adopting the above technical scheme, the oil storage cavity 72 stores lubricating oil, and when in normal use, the transmission shaft 4 drives the inner ring, retainer and rollers of the bearing 3 to rotate. Since the lubricating ball 75 is in contact with the rollers of the bearing 3, the lubricating ball 75 rotates in situ under the friction of the rollers when the bearing 3 rotates. At this time, the lubricating oil in the oil storage cavity 72 is brought out by the rotation of the lubricating ball 75, so that the lubrication of the bearing 3 can be realized. When not working, the lubricating oil will not overflow, so that the equipment is cleaner. Manual lubrication is not required, so that the personnel management of the equipment is saved.
[0032] In the embodiments, the inner side of the outer shell 71 also has a sealing cavity 74, and a plurality of sealing check rings are arranged in the sealing cavity 74 in a staggered manner and are integrally formed with the outer shell 71.
[0033] The plurality of sealing check rings arranged in the sealing cavity 74 in a staggered manner form a labyrinth pattern, which can have a very high blocking effect on dust and can prevent dust from the outside from entering the bearing.
[0034] In the embodiment, the bearing 3 is assembled between the rear cover 5 and the sealing and lubricating member 7, and is fitted on the transmission shaft 4; the rear cover 5 and the sealing and lubricating member 7 are fixedly connected through the locking bolt 6, and the transmission shaft 4 transversely passes through the rear cover 5 and the sealing and lubricating member 7.
[0035] The rear cover 5 and the sealing and lubricating member 7 wrap the bearing 3, so that the dust on both sides of the bearing 3 is prevented from entering; meanwhile, the fixing and installation of the support base 1 and the cover 2 are facilitated.
[0036] In the embodiment, the support base 1 and the cover 2 are fixedly connected through bolts at both ends. The support base 1 and the cover 2 form a bearing seat, which does not directly contact the bearing, but can support the bearing 3 to ensure the sealing and lubricating effect, and is more convenient to use.
[0037] In the embodiment, the support base 1 and the cover 2 are internally provided with grooves for facilitating the installation of the sealing and lubricating member 7.
[0038] By adopting the above technical scheme, the support base 1 and the cover 2 are facilitated to cooperatively install the rear cover 5 and the sealing and lubricating member 7; the support base 1 and the cover 2 are fixedly connected through bolts, so that the radial jumping or following rotation of the rear cover 5 and the sealing and lubricating member 7 is avoided; the cross-sectional shape of the groove is consistent with the external profile cross-sectional shape of the sealing and lubricating member 7, so that the axial jumping of the rear cover 5 and the sealing and lubricating member 7 is prevented.
[0039] The working principle of the utility model is: the oil storage cavity 72 stores lubricating oil, in normal use, the transmission shaft 4 drives the inner ring, retainer and roller of the bearing 3 to rotate, the lubricating ball 75 contacts the roller of the bearing 3, and rotates in place under the friction of the roller when the bearing 3 rotates, at this time, the lubricating oil in the oil storage cavity 72 is taken out by the rotation of the lubricating ball 75, so that the lubrication of the bearing 3 is realized; when not working, the lubricating oil does not overflow, so that the equipment is cleaner, and manual lubrication is not needed, so that the personnel management of the equipment is saved.
[0040] The rear cover 5 and the sealing and lubricating member 7 wrap the bearing 3, so that the dust on both sides of the bearing 3 is prevented from entering; meanwhile, the fixing and installation of the support base 1 and the cover 2 are facilitated; the support base 1 and the cover 2 are fixedly connected through bolts, so that the radial jumping or following rotation of the rear cover 5 and the sealing and lubricating member 7 is avoided; the cross-sectional shape of the groove is consistent with the external profile cross-sectional shape of the sealing and lubricating member 7, so that the axial jumping of the rear cover 5 and the sealing and lubricating member 7 is prevented.
[0041] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments but can be implemented in other embodiments without deviating from the sprit or essential characteristics of the application.
[0042] The application can be implemented in other concrete forms. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being defined by the appended claims and not by the above description, and all changes coming within the meaning and range of equivalency of the elements of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.
[0043] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every implementation can contain all of the features that are described in a particular embodiment, this manner of describing the specification is merely for the sake of convenience and broader descriptions can be applied to other embodiments.
Claims
1. A self-lubricating seal for a shaft, characterized by: It comprises a rear cover (5) and a sealing lubricating part (7) installed in a supporting base (1) and a buckle cover (2); The sealing lubricating part (7) comprises an outer shell (71) with an oil storage cavity (72) inside, an oil injection nozzle (73) being arranged on the top of the oil storage cavity (72) and being threadedly connected with the outer shell (71); The outer shell (71) is movably connected with a lubricating ball (75) at the lower end of the side of the bearing (3), the lubricating ball (75) is arranged in the oil storage cavity (72), and the lubricating ball (75) further projects outside the outer shell (71) and is in contact with the roller of the bearing (3).
2. The self-lubricating seal for a shaft according to claim 1, characterized in that: The inner side of the outer shell (71) further comprises a sealing cavity (74), a plurality of sealing retaining rings are arranged in the sealing cavity (74) in a staggered manner, and the sealing cavity (74) is integrally formed with the outer shell (71).
3. The self-lubricating seal for a shaft according to claim 1, characterized in that: The bearing (3) is assembled between the rear cover (5) and the sealing lubricating part (7), the bearing (3) is cooperatively installed on the transmission shaft (4), the rear cover (5) and the sealing lubricating part (7) are fixedly connected through the locking bolt (6), and the transmission shaft (4) transversely passes through the rear cover (5) and the sealing lubricating part (7).
4. The self-lubricating seal for a shaft according to claim 3, characterized in that: The supporting base (1) and the buckle cover (2) are fixedly connected through bolts at both ends.
5. The self-lubricating seal for a shaft according to claim 1, characterized in that: The supporting base (1) and the buckle cover (2) are both internally provided with a groove for facilitating the installation of the sealing lubricating part (7), and the cross-sectional shape of the groove is consistent with the external outline cross-sectional shape of the sealing lubricating part (7).