Sealing structure for bearing and elevator including the same

Abstract

The utility model relates to a sealing structure for a bearing and an elevator including the device. The sealing structure for a bearing comprises: an end cover, which is sleeved on the transmission shaft and fixed to the machine base, the inner peripheral wall of the end cover is provided with a first mounting groove and a second mounting groove, and the first mounting groove is located between the second mounting groove and the bearing mounting cavity; a baffle, the baffle is provided in the first mounting groove and extends radially inward to form a circular ring structure; and a sealing ring, the sealing ring is provided in the second mounting groove to press against the outer peripheral wall of the transmission shaft, and cooperates with the end cover to seal the bearing mounting cavity. The utility model can not only prevent the lubricating grease inside the bearing from leaking or impurities such as dust, moisture, gas in the external environment from entering the bearing mounting cavity, but also prevent the sealing ring from entering the bearing mounting cavity after being damaged or broken, which is beneficial to ensure the safety of the bearing and increase the service life of the bearing.

Description

Technical Field

[0001] The utility model relates to a sealing structure of a bearing of an elevator traction machine, in particular to a sealing structure for a bearing and an elevator comprising the structure. Background Art

[0002] With the rapid advancement of urbanization, high-rise buildings have gradually become the symbol of the city, and the demand for elevators is also growing rapidly. The sealing structure of the elevator traction machine bearing is a sealing device installed at the end of the elevator traction machine shaft, which is used to seal the bearing installation cavity on the traction machine base to prevent the lubricating grease inside the bearing from leaking or dust, moisture, gas and other impurities in the external environment from entering the bearing installation cavity and affecting the normal operation of the bearing, thereby ensuring the safe operation of the elevator.

[0003] The existing sealing structure for bearings usually adopts contact seal, which usually fixes a sealing ring on the end cover of the traction machine shaft end, and the sealing ring contacts the outer peripheral wall of the transmission shaft to seal the bearing installation cavity. However, after working for a long time, the sealing ring in this sealing structure is easy to be damaged or broken, and the damaged or broken sealing ring is easy to enter the inside of the bearing installation cavity, which will affect the normal operation of the bearing and may even cause damage to the bearing, bringing safety hazards to the operation of the elevator.

[0004] The information disclosed in the background technology part of the present invention is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] In view of the defects existing in the prior art, the utility model aims to provide a sealing structure for a bearing, which can not only prevent the leakage of lubricating grease inside the bearing or impurities such as dust, moisture, gas in the external environment from entering the bearing mounting cavity, but also prevent the sealing ring from entering the bearing mounting cavity after being damaged or broken, which is beneficial to ensure the safety of bearing use and increase the service life of the bearing.

[0006] According to a first aspect of the utility model, the utility model provides a sealing structure for a bearing, wherein the bearing is installed in a bearing installation cavity arranged on a machine base, and the bearing supports a transmission shaft arranged on the machine base, and is characterized in that the sealing structure comprises: an end cover, which is sleeved on the transmission shaft and fixed to the machine base, the inner circumferential wall of the end cover is provided with a first installation groove and a second installation groove, and the first installation groove is located between the second installation groove and the bearing installation cavity; a baffle, which is arranged in the first installation groove and extends radially inward to form a circular ring structure; and a sealing ring, which is arranged in the second installation groove to press against the outer circumferential wall of the transmission shaft, and cooperates with the end cover to seal the bearing installation cavity.

[0007] According to an exemplary embodiment of the utility model, there is a first gap between the inner circumferential wall of the baffle and the outer circumferential wall of the transmission shaft, and the range of the first gap is 0.01~(Dd) / 20mm; wherein D is the outer diameter of the bearing, and d is the inner diameter of the bearing.

[0008] According to an exemplary embodiment of the present utility model, the inner peripheral wall of the end cover is further provided with at least one annular groove.

[0009] According to an exemplary embodiment of the present utility model, an inner peripheral wall of the sealing ring is provided with a receiving groove, and lubricating oil / grease is provided in the receiving groove.

[0010] According to an exemplary embodiment of the present utility model, a second gap is provided between the baffle and the end portion of the bearing.

[0011] According to an exemplary embodiment of the present utility model, a third gap is provided between the sealing ring and the baffle.

[0012] According to a second aspect of the utility model, the utility model provides an elevator, comprising the sealing structure for a bearing as described in the first aspect.

[0013] The sealing structure for the bearing of the utility model can not only prevent the lubricating grease inside the bearing from leaking or impurities such as dust, moisture, gas in the external environment from entering the bearing installation cavity, but also prevent the sealing ring from entering the bearing installation cavity after being damaged or broken, which is beneficial to ensure the safety of the bearing use and increase the service life of the bearing.

[0014] The device of the present invention has other characteristics and advantages, which will be obvious from the drawings and subsequent embodiments incorporated in this document, or will be described in detail in the drawings and subsequent embodiments incorporated in this document, which are used together to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of a sealing structure for a bearing according to an embodiment of the present utility model.

[0016] Description of reference numerals:

[0017] 100: base 110: bearing installation cavity

[0018] 200: Bearings

[0019] 300: Drive shaft

[0020] 400: end cover 410: first installation groove

[0021] 420: second mounting groove 430: annular groove

[0022] 500: Baffle

[0023] 600: Sealing ring.

[0024] In the drawings, the same or similar components and components with the same or similar functions are indicated by the same reference numerals. The drawings are only used to schematically illustrate the present invention and do not limit the protection scope of the present invention.

[0025] It should be understood that the drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of the present invention. The specific design features disclosed in the present invention (including, for example, specific dimensions, directions, positions, and shapes) will be determined in part by the specific intended application and use environment.

[0026] In the figures, like reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. DETAILED DESCRIPTION

[0027] Reference will be made in detail to various embodiments of the present invention, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. On the contrary, the present invention is intended to cover not only these exemplary embodiments, but also various diagram selection forms, modified forms, equivalent forms and other embodiments that may be included in the spirit of the present invention and within the scope defined by the appended claims.

[0028] The structure of the sealing structure for a bearing of the present invention is described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic cross-sectional view of a sealing structure for a bearing according to an embodiment of the present utility model.

[0030] First, it should be noted that the bearing installation cavity 110 described in the sealing structure for the bearing of the utility model is arranged on the machine base 100, the bearing 200 is installed in the bearing installation cavity 110, and the bearing 200 carries the transmission shaft 300 (such as Figure 1 Wherein, the machine base 100 refers to the machine base of the elevator traction machine.

[0031] like Figure 1 As shown, the sealing structure for a bearing according to the embodiment of the utility model comprises: an end cover 400 , a baffle 500 , and a sealing ring 600 .

[0032] The end cover 400 is sleeved on the transmission shaft 300 and fixed on the machine base 100. The inner peripheral wall of the end cover 400 is provided with a first mounting groove 410 and a second mounting groove 420, and the first mounting groove 410 is located between the second mounting groove 420 and the bearing mounting cavity 110. The baffle 500 is provided in the first mounting groove 410 and extends radially inward to form a circular ring structure. The sealing ring 600 is provided in the second mounting groove 420 to press against the outer peripheral wall of the transmission shaft 300, and cooperates with the end cover 400 to seal the bearing mounting cavity 110 to prevent the lubricating grease inside the bearing 200 from leaking or dust, moisture, gas and other impurities in the external environment from entering the bearing mounting cavity 110. At the same time, the annular structure formed by the baffle 500 is located between the sealing ring 600 and the bearing mounting cavity 110, which can prevent the sealing ring 600 from entering the bearing mounting cavity 110 after being damaged or broken. Thus, through the design of the baffle 500 and the sealing ring 600, the sealing structure for the bearing of the utility model can effectively ensure the normal operation of the bearing, which is beneficial to ensure the safety of the bearing and improve the service life of the bearing.

[0033] Specifically, in the exemplary embodiment of the present utility model, Figure 1 As shown, the end cover 400 is roughly disc-shaped, and a through hole is provided in the middle of the end cover 400, and the transmission shaft 300 is passed through the through hole so that the end cover 400 is sleeved on the transmission shaft 300. The end cover 400 can be fixed to the base 100 by fasteners such as bolts, and the side of the end cover 400 fixed to the base 100 can fit with the end of the bearing 200 in the bearing installation cavity 110.

[0034] The first mounting groove 410 is located at one side of the end cover 400 fixed to the base 100 and is set to a step structure. The baffle 500 can be fixed in the first mounting groove 410 by a fastener. The width of the first mounting groove 410 is wider than the width of the baffle 500, so that a gap D2 can be provided between the baffle 500 and the end of the bearing 200, thereby avoiding possible interference between the baffle 500 and the bearing 200.

[0035] Furthermore, there is a gap D1 between the inner circumferential wall of the baffle 500 and the outer circumferential wall of the transmission shaft 300. The function of the gap D1 is to ensure that the baffle 500 and the transmission shaft 300 do not contact each other, thereby avoiding interference between the baffle 500 and the transmission shaft 300, and at the same time to ensure that the damaged or broken sealing ring 600 can be blocked by the baffle 500 and will not enter the bearing mounting cavity 110 through the gap D1. Preferably, the range of the gap D1 is 0.01~(Dd) / 20mm, wherein D is the outer diameter of the bearing 200, and d is the inner diameter of the bearing 200. That is to say, according to experience, the maximum value of the gap D1 of the utility model can be appropriately adjusted according to the actual size of the bearing 200, and on this basis, it can be ensured that the damaged or broken sealing ring 600 will not cause a safety hazard to the bearing 200.

[0036] Further, the size of the second mounting groove 420 is adapted to the structure of the sealing ring 600, so as to ensure that when the sealing ring 600 is installed in the second mounting groove 420, the sealing ring 600 can produce elastic deformation under the pressure of the second mounting groove 420, so as to be pressed more tightly against the outer peripheral wall of the transmission shaft 300, thereby better sealing the gap between the inner peripheral wall of the end cover 400 and the transmission shaft 300. The material of the sealing ring 600 can be rubber, or other materials that can produce elastic deformation, which is not limited to this in this article.

[0037] Furthermore, there is a gap D3 between the sealing ring 600 and the baffle 500. The gap D3 can avoid interference between the sealing ring 600 and the baffle 500, thereby affecting the stability of the installation of the baffle 500. At the same time, the gap D3 can avoid assembly problems caused by thermal expansion of the sealing ring 600. Among them, the outer wall of the sealing ring 600 can be fixed to the inner wall of the second installation groove 420 by means of glue or the like to prevent the sealing ring 600 from being displaced along the transmission shaft 300 when the transmission shaft 300 rotates, thereby ensuring that the size of the gap D3 does not change significantly.

[0038] According to an exemplary embodiment of the utility model, the inner circumferential wall of the sealing ring 600 is provided with a receiving groove (not shown in the figure), and lubricating oil / grease is provided in the receiving groove so that an oil film can be formed between the sealing ring 600 and the transmission shaft 300, thereby not only reducing the friction between the sealing ring 600 and the transmission shaft 300, but also alleviating the cracking of the sealing ring 600 and extending the service life of the sealing ring 600.

[0039] According to an exemplary embodiment of the utility model, the inner peripheral wall of the end cover 400 may be provided with at least one annular groove 430. The annular groove 430 is located on the side of the end cover 400 away from the bearing mounting cavity 110. The annular groove 430 can be used to prevent the lubricating oil / grease in the receiving groove of the sealing ring 600 from leaking to the outside of the end cover 400, and can also be used to store an appropriate amount of lubricating oil / grease, so that when the transmission shaft 300 rotates, the lubricating oil / grease stored in the annular groove 430 can be brought between the sealing ring 600 and the transmission shaft 300, thereby reducing the friction between the sealing ring 600 and the transmission shaft 300 and relieving the cracking of the sealing ring 600. Preferably, in this embodiment, the annular groove 430 is set to 3, and as another option, the annular groove 430 can also be set to other numbers. Furthermore, the extension direction of the annular groove 430 in this embodiment can be perpendicular to the outer wall of the transmission shaft 300. Alternatively, the extension direction of the annular groove 430 can also have a certain inclination angle with the outer wall of the transmission shaft 300. This is not limited to this in this article, as long as the above-mentioned functions can be achieved.

[0040] The utility model also provides an elevator, comprising the above-mentioned sealing structure for bearings.

[0041] The sealing structure for the bearing of the utility model can not only prevent the lubricating grease inside the bearing from leaking or impurities such as dust, moisture, gas in the external environment from entering the bearing installation cavity, but also prevent the sealing ring from entering the bearing installation cavity after being damaged or broken, which is beneficial to ensure the safety of the bearing use and increase the service life of the bearing.

[0042] At the same time, the utility model provides an annular groove, which can not only be used to prevent the lubricating oil / grease in the accommodating groove of the sealing ring from leaking to the outside of the end cover, but can also be used to store an appropriate amount of lubricating oil / grease to reduce the friction between the sealing ring and the transmission shaft and alleviate the cracking of the sealing ring, thereby extending the service life of the sealing ring, thereby further ensuring the safety of the bearing use and improving the service life of the bearing.

[0043] For convenience of interpretation and precise definition of the appended claims, the terms "upper", "lower", "inner", "outer", "above", "below", "upper", "lower", "upward", "downward", "front", "back", "back", "inside", "outside", "inward", "outward", "interior", "exterior", "inner", "external", "forward", and "backward" are used to describe the features of the exemplary embodiments with reference to the positions of such features as shown in the accompanying drawings.

[0044] The description presented above of the specific exemplary embodiments of the utility model is for the purpose of illustration and description. The foregoing description is not intended to be exhaustive, nor is it intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations are possible based on the above teachings. The exemplary embodiments are selected and described in order to explain the specific principles of the utility model and its practical application, so that other technicians in the field can realize and utilize the various exemplary embodiments of the utility model and its different selected forms and modified forms. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sealing structure for a bearing, wherein the bearing is installed in a bearing installation cavity provided on a machine base, and the bearing supports a transmission shaft provided on the machine base, characterized in that: The sealing structure comprises: An end cover, which is sleeved on the transmission shaft and fixed to the machine base, wherein the inner peripheral wall of the end cover is provided with a first mounting groove and a second mounting groove, and the first mounting groove is located between the second mounting groove and the bearing mounting cavity; a baffle, the baffle being disposed in the first mounting groove and extending radially inward to form a circular ring structure; and A sealing ring is arranged in the second mounting groove to press against the outer peripheral wall of the transmission shaft, and cooperates with the end cover to seal the bearing mounting cavity.

2. The sealing structure for a bearing according to claim 1, characterized in that: There is a first gap between the inner peripheral wall of the baffle and the outer peripheral wall of the transmission shaft, and the range of the first gap is 0.01 to (Dd) / 20 mm; Wherein, D is the outer diameter of the bearing, and d is the inner diameter of the bearing.

3. The sealing structure for a bearing according to claim 1, characterized in that: The inner peripheral wall of the end cover is further provided with at least one annular groove.

4. The sealing structure for a bearing according to claim 1, characterized in that: The inner peripheral wall of the sealing ring is provided with a receiving groove, and lubricating oil / grease is provided in the receiving groove.

5. The sealing structure for a bearing according to claim 1, characterized in that: A second gap is defined between the baffle and the end of the bearing.

6. The sealing structure for a bearing according to claim 2, characterized in that: A third gap is defined between the sealing ring and the baffle.

7. An elevator, characterized in that: The invention comprises a sealing structure for a bearing as described in any one of claims 1 to 6.

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