Double-sealed one-way bearing

Abstract

The invention relates to the technical field of one-way bearings, in particular to a double-sealed one-way bearing which comprises an outer ring, an inner ring located in the outer ring and balls distributed between the outer ring and the inner ring, a spherical retainer is arranged between the outer ring and the inner ring, the balls are located in the spherical retainer, and a sealing piece is arranged between the outer ring and the inner ring. The two groups of sealing pieces are symmetrically distributed on the two sides of the spherical retainer; the sealing pieces are distributed between the outer ring and the inner ring in an annular structure, the outer side of the inner ring is integrally connected with a fixing ring, the sealing pieces are attached to the fixing ring, and the sealing pieces and the fixing ring are fixed in a welding mode, a bolt mode and a gluing mode. According to the double-sided sealing structure of the one-way bearing, the excellent external moisture and dust prevention effects can be achieved, and the sealing effect of the sealing piece on the one-way bearing can be kept for a long time especially in the high-rotating-speed application state through the rotating speed centrifugal force.

Description

Technical Field

[0001] The present invention relates to the technical field of one-way bearings, and more particularly to a double-sided sealed one-way bearing. Background Art

[0002] A one-way bearing is a bearing that can rotate freely in one direction and is locked in the other direction;

[0003] Although the current one-way bearings can achieve double-sided sealing of the bearings during use, for example, a double-sided sealed one-way bearing disclosed in the utility model with the publication number CN202266595U, the lubrication of the internal structure is very important during the long-term use of such bearings. However, the double-sided sealing of this device makes the addition of lubricating oil inside the bearing very cumbersome and inconvenient for the user to operate. Moreover, the addition of lubricating oil in this device is carried out by the user according to the service life of the bearing. During actual use, the consumption of lubricating oil inside the bearing not only needs to consider the lubricating oil itself, but also the influence of the external environmental temperature, the consumption at high rotational speed and high power, and even the leakage of lubricating oil in special cases. If the lubricating oil is not added in time, it will not only affect the transmission of the transmission parts but also cause damage to the bearing.

[0004] Therefore, a double-sided sealed one-way bearing is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a double-sided sealed one-way bearing to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A double-sided sealed one-way bearing, including an outer ring, an inner ring located in the outer ring, and balls distributed between the outer ring and the inner ring. A spherical cage is arranged between the outer ring and the inner ring, and the balls are located in the spherical cage. A seal is arranged between the outer ring and the inner ring, and the seal is divided into two groups and symmetrically distributed on both sides of the spherical cage;

[0007] The seal is distributed in an annular structure between the outer ring and the inner ring. A fixing ring is integrally connected to the outer side of the inner ring, and the seal fits with the fixing ring. The seal and the fixing ring are fixed by welding, bolt fixing, or bonding;

[0008] An outer barrier sheet and an inner barrier sheet are respectively arranged on the outer side of the seal away from the outer wall of the inner ring. The outer barrier sheet and the inner barrier sheet are designed in an inverted V-shaped structure. The outer barrier sheet and the inner barrier sheet are made of elastic alloy metal, and the length of the outer barrier sheet is greater than that of the inner barrier sheet. The outer barrier sheet and the inner barrier sheet do not contact the inner wall of the outer ring in the static state.

[0009] Preferably, a positioning groove is formed on the outer side of the seal, and the adjacent ends of the outer barrier sheet and the inner barrier sheet are integrally connected and elastically inserted and fixed inside the positioning groove.

[0010] Preferably, a positioning piece is integrally and fixedly connected to the outer side of the seal, and the adjacent ends of the outer barrier sheet and the inner barrier sheet are integrally connected and fixed to the surface of the positioning piece by bolts.

[0011] Preferably, the outer side of the seal is designed in a toothed structure, and the installation groove is formed between adjacent teeth. The adjacent ends of the outer barrier sheet and the inner barrier sheet are integrally connected and located in the installation groove. Moreover, a plugging groove is formed at a position corresponding to the integrally connected end of the outer barrier sheet and the inner barrier sheet in the installation groove. A pin and a first spring are arranged in the plugging groove. A first spring and a half pin are arranged in half of the plugging groove on the inner wall of the installation groove, and the other half of the pin is plugged into the other end of the plugging groove.

[0012] Preferably, the displacement direction of the pin is opposite to the rotation direction of the one-way bearing, and the pin, the first spring and the plugging groove are distributed in two groups on both sides of the integrally connected end of the outer barrier sheet and the inner barrier sheet.

[0013] Preferably, oil cavities are equidistantly formed inside the seal. An oil injection hole is formed in the area near the bottom of the oil cavity on the outer side of the seal. An oil discharge hole is formed near the top of the oil cavity inside the seal. The oil injection hole and the oil discharge hole are of a one-way discharge structure.

[0014] Preferably, a piston block and a second spring are arranged at the bottom end inside the oil cavity, and two ends of the second spring are respectively fixedly connected with the piston block and the bottom of the oil cavity. The outer wall of the piston block is in fit design with the inner wall of the oil cavity.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The one-way bearing double-sided sealing structure designed in the present application can achieve excellent external moisture and dust prevention effects. Especially for high-speed application states, by using the rotational centrifugal force, the sealing effect of the seal on the one-way bearing can be maintained for a long time.

[0017] 2. By using the centrifugal force generated by the rotation of the one-way bearing, the present application can automatically supplement lubricating oil to the one-way bearing, preventing the loss of lubricating oil due to the unconventional natural consumption of lubricating oil in the one-way bearing and causing damage to the one-way bearing.

[0018] 3. The three connection structures provided by the seal and the outer barrier sheet and the inner barrier sheet designed in the present application are convenient for users to specifically select according to actual use requirements, meeting different use requirements of users. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is the overall structural view of the present invention;

[0021] Figure 2 It is the structural view of the seal, outer barrier sheet and inner barrier sheet of the present invention;

[0022] Figure 3 It is the overall structural sectional view of the present invention;

[0023] Figure 4 For the present invention Figure 3 The enlarged view at position A in;

[0024] Figure 5 It is the sectional view of the seal and the positioning groove of the present invention;

[0025] Figure 6 It is the structural view of the seal and the positioning piece of the present invention;

[0026] Figure 7 It is the top view sectional view of the seal, outer barrier sheet and inner barrier sheet of the present invention.

[0027] Explanation of reference numerals:

[0028] 1. Outer ring; 2. Inner ring; 3. Seal; 31. Outer barrier sheet; 311. Oil cavity; 312. Oil injection hole; 313. Oil drain hole; 314. Positioning piece; 315. Positioning groove; 316. Piston block; 317. Second spring; 32. Inner barrier sheet; 33. Retaining ring; 34. Fixed ring; 4. Ball; 5. Spherical cage; 6. Pin; 7. First spring; 8. Movable groove. Specific embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] Please refer to Figures 1 to 7 , the present invention provides a technical solution:

[0031] A double-sided sealed one-way bearing includes an outer ring 1, an inner ring 2 located in the outer ring 1, and balls 4 distributed between the outer ring 1 and the inner ring 2. A spherical cage 5 is arranged between the outer ring 1 and the inner ring 2, and the balls 4 are located in the spherical cage 5. A seal 3 is arranged between the outer ring 1 and the inner ring 2, and the seal 3 is divided into two groups and symmetrically distributed on both sides of the spherical cage 5;

[0032] The seal 3 is distributed in an annular structure between the outer ring 1 and the inner ring 2. A fixing ring 34 is integrally connected to the outer side of the inner ring 2. The seal 3 is attached to the fixing ring 34, and the seal 3 and the fixing ring 34 are fixed by welding, bolt fixing, or adhesive bonding;

[0033] Outer barrier sheets 31 and inner barrier sheets 32 are respectively arranged on the outer side of the seal 3 away from the outer wall of the inner ring 2. The outer barrier sheets 31 and the inner barrier sheets 32 are designed in an inverted V-shaped structure. The outer barrier sheets 31 and the inner barrier sheets 32 are made of elastic alloy metal, and the length of the outer barrier sheets 31 is greater than that of the inner barrier sheets 32. The outer barrier sheets 31 and the inner barrier sheets 32 do not contact the inner wall of the outer ring 1 in the static state.

[0034] The sealing structure adopted in this application is that the combination of the seal 3, the outer barrier sheets 31, and the inner barrier sheets 32 shields both sides of the one-way bearing. During use, the seal 3 is fixed to the inner ring 2. During use, the inner ring 2 is connected to a shaft rod or the output shaft of a motor to drive rotation. In this state, the inner ring 2 drives the seal 3, the outer barrier sheets 31, and the inner barrier sheets 32 to rotate at a high speed. Using the rotational centrifugal force, the outer barrier sheets 31 and the inner barrier sheets 32 are driven to bend and deform outward, and then contact the inner wall of the outer ring 1 to form a complete sealing structure. The outer barrier sheets 31 shield against the entry of external dust, moisture, or impurities, and the inner barrier sheets 32 shield the lubricating oil between the inner ring 2 and the outer ring 1 to prevent the lubricating oil from overflowing from the bearing under the action of centrifugal force and reducing the service life of the lubricating oil.

[0035] Specifically, a positioning groove 315 is opened on the outer side of the seal 3, and the adjacent ends of the outer barrier sheets 31 and the inner barrier sheets 32 are integrally connected and elastically inserted and fixed inside the positioning groove 315.

[0036] By adopting the above technical solution, since the outer barrier sheets 31 and the inner barrier sheets 32 contact the inner wall of the outer ring 1 and cause wear, the outer barrier sheets 31 and the inner barrier sheets 32 need to be replaced after a period of use. Therefore, in this application, by designing the positioning groove 315, the integrally connected ends of the annular outer barrier sheets 31 and the inner barrier sheets 32 are inserted into the annularly opened positioning groove 315 for fixation. The integrally connected ends of the annular outer barrier sheets 31 and the inner barrier sheets 32 are provided with protrusions matching the positioning groove 315.

[0037] Specifically, a positioning piece 314 is integrally and fixedly connected to the outer side of the seal 3, and the adjacent ends of the outer barrier piece 31 and the inner barrier piece 32 are integrally connected and fixed to the surface of the positioning piece 314 by bolts.

[0038] By adopting the above technical solution, since the outer barrier piece 31 and the inner barrier piece 32 are in contact with the inner wall of the outer ring 1, wear is caused. Therefore, after a period of use, the outer barrier piece 31 and the inner barrier piece 32 need to be replaced. Therefore, in this application, the positioning piece 314 is used in cooperation with bolts for connection and fixation, and this connection method is applicable to the one-way bearing used at low speeds.

[0039] Specifically, the outer side of the seal 3 is designed with a toothed structure, and the installation groove is between adjacent teeth. The adjacent ends of the outer barrier piece 31 and the inner barrier piece 32 are integrally connected and located in the installation groove. And the corresponding position of the installation groove and the integrally connected end of the outer barrier piece 31 and the inner barrier piece 32 is provided with a plug-in groove, and a pin 6 and a first spring 7 are arranged in the plug-in groove. The first spring 7 and half of the pin 6 are arranged in half of the plug-in groove on the inner wall of the installation groove, and the other half of the pin 6 is inserted into the other end of the plug-in groove. The displacement direction of the pin 6 is opposite to the rotation direction of the one-way bearing, and the pin 6, the first spring 7 and the plug-in groove are distributed in two groups on both sides of the integrally connected end of the outer barrier piece 31 and the inner barrier piece 32.

[0040] By adopting the above technical solution, since the outer barrier piece 31 and the inner barrier piece 32 are in contact with the inner wall of the outer ring 1, wear is caused. Therefore, after a period of use, the outer barrier piece 31 and the inner barrier piece 32 need to be replaced. This structure mainly utilizes the rotational centrifugal force of the one-way bearing rotating in one direction to pull the spring to deform, so that the pin 6 is displaced, and the pin 6 is inserted into the plug-in groove to realize the connection and fixation of the structure.

[0041] Specifically, oil cavities 311 are equidistantly arranged inside the seal 3. An oil injection hole 312 is arranged in the area near the bottom of the oil cavity 311 on the outer side of the seal 3. An oil drain hole 313 is arranged near the top of the oil cavity 311 inside the seal 3. The oil injection hole 312 and the oil drain hole 313 are of a one-way discharge structure. A piston block 316 and a second spring 317 are arranged at the bottom end inside the oil cavity 311, and the two ends of the second spring 317 are respectively fixedly connected to the piston block 316 and the bottom of the oil cavity 311. The outer wall of the piston block 316 is designed to fit the inner wall of the oil cavity 311.

[0042] By adopting the above technical solution, during use, the inner ring 2 is connected to the shaft rod or the motor output shaft to drive rotation. In this state, the inner ring 2 drives the seal 3, the outer barrier piece 31 and the inner barrier piece 32 to rotate at high speed. Using the rotational centrifugal force, the second spring 317 is pulled upward, driving the piston block 316 to displace, squeezing the lubricating oil in the oil chamber 311. If the lubricating oil at the ball 4 is missing, the lubricating oil overflows through the oil drain hole 313 and is discharged to the ball 4 for lubrication operation.

[0043] Working principle: The sealing structure adopted in this application is that the combination of the seal 3, the outer barrier piece 31 and the inner barrier piece 32 shields both sides of the one-way bearing. During use, the seal 3 is fixed to the inner ring 2. During use, the inner ring 2 is connected to the shaft rod or the motor output shaft to drive rotation. In this state, the inner ring 2 drives the seal 3, the outer barrier piece 31 and the inner barrier piece 32 to rotate at high speed. Using the rotational centrifugal force, the outer barrier piece 31 and the inner barrier piece 32 are driven to bend and deform outward, and then contact the inner wall of the outer ring 1 to form a complete sealing structure. The outer barrier piece 31 shields the entry of external dust, moisture or impurities, and the inner barrier piece 32 shields the lubricating oil between the inner ring 2 and the outer ring 1, preventing the lubricating oil from overflowing from the bearing under the action of centrifugal force and reducing the service life of the lubricating oil.

[0044] Since the outer barrier piece 31 and the inner barrier piece 32 contact the inner wall of the outer ring 1 and cause wear, the outer barrier piece 31 and the inner barrier piece 32 need to be replaced after a period of use. Therefore, in this application, the positioning groove 315 is designed, and the integral connection ends of the annular outer barrier piece 31 and the inner barrier piece 32 are inserted into the annularly opened positioning groove 315 for fixation. The integral connection ends of the annular outer barrier piece 31 and the inner barrier piece 32 are provided with protrusions matching the positioning groove 315.

[0045] Since the outer barrier piece 31 and the inner barrier piece 32 contact the inner wall of the outer ring 1 and cause wear, the outer barrier piece 31 and the inner barrier piece 32 need to be replaced after a period of use. Therefore, this application adopts the method of using the positioning piece 314 in cooperation with bolts for connection and fixation, and this connection method is applicable to the one-way bearing used at low speeds.

[0046] Since the outer barrier piece 31 and the inner barrier piece 32 contact the inner wall of the outer ring 1 and cause wear, the outer barrier piece 31 and the inner barrier piece 32 need to be replaced after a period of use. This structure mainly utilizes the rotational centrifugal force of the one-way bearing rotating in one direction to pull the spring to deform, causing the pin 6 to displace, and the pin 6 is inserted into the insertion groove to achieve connection and fixation in structure.

[0047] During use, the inner ring 2 is connected to the shaft rod or the motor output shaft to drive rotation. In this state, the inner ring 2 drives the seal 3, the outer barrier piece 31, and the inner barrier piece 32 to rotate at high speed. Using the rotational centrifugal force, the second spring 317 is pulled upward to drive the piston block 316 to displace, squeezing the lubricating oil in the oil chamber 311. If the lubricating oil at the ball 4 is missing, the lubricating oil overflows through the oil drain hole 313 and is discharged to the ball 4 for lubrication operation.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-sided sealed one-way bearing, comprising an outer ring (1), an inner ring (2) located in the outer ring (1), and balls (4) distributed between the outer ring (1) and the inner ring (2). A spherical cage (5) is arranged between the outer ring (1) and the inner ring (2), and the balls (4) are located in the spherical cage (5). It is characterized in that: A seal (3) is provided between the outer ring (1) and the inner ring (2), and the seal (3) is divided into two groups and symmetrically distributed on both sides of the spherical cage (5); The seal (3) is distributed in an annular structure between the outer ring (1) and the inner ring (2). A fixing ring (34) is integrally connected to the outer side of the inner ring (2), and the seal (3) is attached to the fixing ring (34). The seal (3) and the fixing ring (34) are fixed by welding, bolting, or bonding; On the outer side of the seal (3) and away from the outer wall of the inner ring (2), an outer barrier piece (31) and an inner barrier piece (32) are respectively provided. The outer barrier piece (31) and the inner barrier piece (32) are designed in an inverted V-shaped structure. The outer barrier piece (31) and the inner barrier piece (32) are made of elastic alloy metal, and the length of the outer barrier piece (31) is greater than that of the inner barrier piece (32). The outer barrier piece (31) and the inner barrier piece (32) do not contact the inner wall of the outer ring (1) in the static state.

2. The double-sided sealed one-way bearing according to claim 1, wherein: A positioning groove (315) is formed on the outer side of the seal (3). The adjacent ends of the outer barrier piece (31) and the inner barrier piece (32) are integrally connected and elastically inserted and fixed inside the positioning groove.

3. The double-sided sealed one-way bearing according to claim 2, characterized in that: A positioning piece (314) is integrally and fixedly connected to the outer side of the seal (3). The adjacent ends of the outer barrier piece (31) and the inner barrier piece (32) are integrally connected and fixed to the surface of the positioning piece (314) by bolts.

4. A double-sided sealed one-way bearing according to claim 3, characterized in that: The outer side of the seal (3) is designed in a toothed structure, and the space between adjacent teeth is an installation groove. The adjacent ends of the outer barrier piece (31) and the inner barrier piece (32) are integrally connected and located in the installation groove. At the corresponding position of the installation groove and the integrally connected end of the outer barrier piece (31) and the inner barrier piece (32), a plugging groove is formed. A pin (6) and a first spring (7) are arranged in the plugging groove. One half of the inner wall of the installation groove is provided with the first spring (7) and one half of the pin (6), and the other half of the pin (6) is inserted into the other end of the plugging groove.

5. A double-sided sealed one-way bearing according to claim 4, characterized in that: The displacement direction of the pin (6) is opposite to the rotation direction of the one-way bearing, and the pin (6), the first spring (7), and the plugging groove are distributed in two groups on both sides of the integrally connected end of the outer barrier piece (31) and the inner barrier piece (32).

6. The double-sided sealed one-way bearing according to claim 5, wherein: Oil cavities (311) are equidistantly formed inside the seal (3). An oil injection hole (312) is formed in the outer side of the seal (3) near the bottom area of the oil cavity (311), and an oil drain hole (313) is formed inside the seal (3) near the top of the oil cavity (311). The oil injection hole (312) and the oil drain hole (313) are of a one-way discharge structure.

7. A double-sided sealed one-way bearing according to claim 6, characterized in that: A piston block (316) and a second spring (317) are arranged at the bottom end inside the oil cavity (311). The two ends of the second spring (317) are respectively fixedly connected to the piston block (316) and the bottom of the oil cavity (311). The outer wall of the piston block (316) is designed to be in fit with the inner wall of the oil cavity (311).

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