A bearing for EGR electronically controlled valve

Abstract

The utility model discloses a bearing for an EGR electric control valve, which effectively reduces the damage to the bearing caused by corrosive gas in exhaust gas, comprises an outer ring, an inner ring, two sealing members, a plurality of rolling elements, and a retaining frame for limiting the rolling elements: the inner wall of the outer ring is provided with a dustproof groove, and one side of the dustproof groove is provided with a first arc groove; the sealing member, the inner side wall of the outer ring, and the outer side wall of the inner ring together form a working area, the interior of the sealing member is provided with a storage groove, the storage groove is filled with grease, and the outer peripheral sealing body of the sealing member; the retaining frame is composed of a first combination frame and a second combination frame, and the right side of the first combination frame is provided with a bending plate. The utility model has a novel structure, an ingenious conception, and is simple and convenient to operate, and effectively achieves the purpose of increasing the service life of the bearing, reduces the risk of the sealing member falling off during the impact process, achieves the purpose of enabling the bearing to self-lubricate during rotation, improves the sealing effect of the sealing member, and enhances the impact resistance of the bearing.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings and relates to a bearing for an EGR electric control valve. Background Art

[0002] The EGR system, or exhaust gas recirculation system, is a device used to reduce the emission of nitrogen oxides (NOx) in automobile exhaust. Its working principle is to return part of the exhaust gas discharged by the engine to the intake manifold, and enter the cylinder together with the fresh mixture to participate in combustion.

[0003] In the prior art, in the exhaust gas recirculation system of the engine energy-saving and emission-reduction technology, the bearing used for the motor control valve has a sliding bearing installed on its shaft, which is transitionally matched with the shaft, and the outer sleeve rotates in contact with its inner concave cam body. Since the exhaust gas recirculation system is opened frequently and has high efficiency requirements, the friction torque of the sliding bearing is large, and the bearing will be subjected to impact force during the switching process, which is easy to cause energy loss and reduce the accuracy of the exhaust gas control amount. In addition, since the sliding bearing is limited by the lubrication effect, there is a certain limit on its service life;

[0004] In addition, since the exhaust gas treated by the exhaust gas recirculation system contains corrosive gases, it is easy to affect the lubrication inside the bearing, so a method that can perform lubrication on the bearing is needed. Summary of the invention

[0005] In view of the above problems, the utility model proposes a bearing for an EGR electronically controlled valve, which well solves the problems in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A bearing for an EGR electronically controlled valve, comprising an outer ring, an inner ring, two seals, a plurality of rolling elements, and a retaining frame for limiting the position of the rolling elements, wherein the inner wall of the outer ring is symmetrically provided with a dustproof groove, and each dustproof groove is provided with a first arc groove on a side close to the rolling element;

[0008] The seal is annular, and the two seals, the inner wall of the outer ring, and the outer wall of the inner ring enclose a working area. A storage groove is provided inside the seal, and the storage groove is filled with grease. A sealing body is fixedly connected to the outer periphery of the seal, and the sealing body and the dustproof groove cooperate with each other to form a dustproof structure of the working area;

[0009] The retaining frame is composed of a first assembly frame and a second assembly frame that cooperate with each other. A plurality of bending plates are fixedly connected to the right side of the first assembly frame. The bending plates and the second assembly frame cooperate with each other to form a rolling body limiting structure.

[0010] Preferably, the sealing body includes a trapezoidal notch on one side of the outer periphery away from the working area, and a second circular arc groove is provided on the opposite side of the trapezoidal notch on the sealing body, the radius of the second circular arc groove is greater than the radius of the first circular arc groove, and the trapezoidal notch, the second circular arc groove and the dustproof groove are interference fit to form a dust isolation structure.

[0011] Preferably, the storage grooves are L-shaped, each storage groove is connected to the working area, and the inner edge of each sealing body is a slope and is gap-matched with the inner ring.

[0012] Preferably, the sealing element and the sealing body are both made of fluororubber.

[0013] Preferably, the grease is polytetrafluoroethylene grease.

[0014] Preferably, the first assembly frame and the second assembly frame are both made of stainless steel.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model has a sealing body and a dustproof groove with an interference fit, which can simultaneously have an interference fit in the axial and radial directions of the sealing body and the dustproof groove during use, thereby increasing the fixing firmness of the sealing body and reducing the risk of the sealing body being forced to fall off during impact and vibration.

[0017] 2. The utility model has a storage tank and grease. By using polytetrafluoroethylene grease, the tolerance of grease to corrosive gases can be reduced, thereby increasing the service life of the bearing. The storage tank can make the bearing have self-lubricating ability.

[0018] 3. The utility model has a retaining frame formed by combining the first assembly frame and the second assembly frame, which is limited by a bent plate, which is not only convenient for workers to assemble it, but also convenient for inspection during use, thereby increasing the impact resistance of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 For this utility model Figure 1 A partial enlarged schematic diagram of area A in the middle.

[0021] Figure 3 It is a schematic diagram of the exploded structure of the first assembly frame and the second assembly frame in the utility model.

[0022] In the figure: 1, outer ring; 2, inner ring; 3, seal; 4, rolling element; 5, retaining frame; 6, dustproof groove; 7, first arc groove; 8, working area; 9, storage groove; 10, seal; 51, first assembly frame; 52, second assembly frame; 13, bending plate; 14, trapezoidal notch; 15, second arc groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The following is combined with Figure 1-Figure 3 The specific implementation modes of the present utility model are further described in detail.

[0025] Depend on Figure 1-Figure 3 The utility model includes an outer ring 1, an inner ring 2, two seals 3, a plurality of rolling elements 4, and a retaining frame 5 for limiting the rolling elements 4. In order to increase the service life of the bearing, a dustproof groove 6 is symmetrically provided on the inner wall of the outer ring 1, and a first arc groove 7 is provided on the side of each dustproof groove 6 close to the rolling element 4.

[0026] The seal 3 is annular, and the two seals 3, the inner wall of the outer ring 1, and the outer wall of the inner ring 2 enclose a working area 8. A storage groove 9 is provided inside the seal 3, and the storage groove 9 and the working area 8 are filled with grease. A sealing body 10 is fixedly connected to the outer periphery of the seal 3, and the sealing body 10 cooperates with the dustproof groove 6 to form a dustproof structure of the working area 8;

[0027] The retaining frame 5 is composed of a first assembly frame 51 and a second assembly frame 52 that cooperate with each other. A plurality of bending plates 13 are fixedly connected to the right side of the first assembly frame 51. The bending plates 13 and the second assembly frame 52 cooperate with each other to form a structure for limiting the rolling body 4.

[0028] When in use, when the bearing is in use, the seal 3 can be used to prevent dust from entering the working area 8, thereby reducing the damage caused by external dust entering the working area 8 to the rolling element 4 and the raceway; the first assembly frame 51 and the second assembly frame 52 are designed to be separated, which can be convenient for the staff to assemble them. The cross-section of the bending plate 13 is J-shaped. When assembling, each bending plate 13 can be matched with the left side wall of the second assembly frame 52, and the first assembly frame 51 and the second assembly frame 52 can be clamped through the bending plate 13, which is convenient for operation.

[0029] Further, by Figure 1-Figure 3 It is given that, in order to reduce the risk of the sealing body 10 falling off during the impact process, the sealing body 10 includes a trapezoidal notch 14 on the side of the outer periphery away from the working area 8, and a second arc groove 15 is provided on the opposite side of the trapezoidal notch 14 on the sealing body 10, and the radius of the second arc groove 15 is greater than the radius of the first arc groove 7, and the trapezoidal notch 14, the second arc groove 15 and the dustproof groove 6 are interference-fitted to form a dust-isolating structure;

[0030] When in use, through the interference fit between the trapezoidal notch 14, the second arc groove 15 and the dustproof groove 6, when the bearing is impacted, the matching state of the sealing body 10 and the dustproof groove 6 can be maintained, thereby reducing the risk of bearing damage.

[0031] Further, by Figure 1-Figure 3 It is given that, in order to achieve the purpose of self-lubrication of the bearing during rotation, the storage groove 9 is L-shaped, each storage groove 9 is connected to the working area 8, and the inner edge of each sealing body 10 is a bevel and has a clearance fit with the inner ring 2;

[0032] When in use, the L-shaped storage groove 9 can not only store grease, thereby increasing the amount of grease inside the working area 8, but also reduce the bending moment of the seal 3 during installation, making it easier for the staff to install it.

[0033] Further, by Figure 1-Figure 3 It is given that, in order to improve the sealing effect of the sealing body 10, the sealing element 3 and the sealing body 10 are both made of fluororubber;

[0034] When in use, fluororubber material is selected for sealing, so that the sealing member 3 has a better sealing effect.

[0035] Further, by Figure 1-Figure 3 It is given that in order to reduce the damage to the bearing caused by the corrosive gas in the exhaust gas, the grease is polytetrafluoroethylene grease;

[0036] The grease used is made of special specifications of polytetrafluoroethylene, which can effectively protect the bearing raceway, reduce the corrosion of the bearing raceway by the corrosive gas in the exhaust gas, and increase the service life of the bearing.

[0037] Further, by Figure 1-Figure 3 It is shown that the first assembly frame 51 and the second assembly frame 52 are both made of stainless steel.

[0038] When the utility model is used, the seal 3 can be used to prevent dust from entering the working area 8, thereby reducing the damage to the rolling element 4 and the raceway caused by external dust entering the working area 8. The interference fit between the trapezoidal notch 14, the second arc groove 15 and the dustproof groove 6 can keep the seal 10 and the dustproof groove 6 in a matched state when the bearing is impacted, thereby reducing the risk of bearing damage. The L-shaped storage groove 9 can store grease, thereby increasing the amount of grease inside the working area 8, and can also reduce the seal during the installation of the seal 3. The bending moment of the component 3 during installation is reduced, which makes it convenient for the staff to install it; the first assembly frame 51 and the second assembly frame 52 are designed to be separated. When assembling, each bending plate 13 can be matched with the left side wall of the second assembly frame 52, and the first assembly frame 51 and the second assembly frame 52 can be clamped through the bending plate 13, which is convenient for operation; the grease is made of special specifications of PTFE material, which can effectively protect the bearing raceway, reduce the corrosion of the corrosive gas in the exhaust gas to the bearing raceway, and increase the service life of the bearing.

[0039] The utility model has a novel structure, ingenious conception, and simple and convenient operation. Through this design, the damage to the bearing caused by the corrosive gas in the exhaust gas is effectively reduced, the purpose of increasing the service life of the bearing is achieved, the risk of the sealing body 10 falling off during the impact process is reduced, the purpose of self-lubrication of the bearing during rotation is achieved, the sealing effect of the sealing body 10 is improved, and the impact resistance of the bearing is enhanced.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bearing for an EGR electronically controlled valve, comprising an outer ring, an inner ring, two seals, a plurality of rolling elements, and a retaining frame for limiting the position of the rolling elements, characterized in that: The inner wall of the outer ring is symmetrically provided with a dustproof groove, and each dustproof groove is provided with a first arc groove on one side close to the rolling element; The seal is annular, and the two seals, the inner wall of the outer ring, and the outer wall of the inner ring enclose a working area. A storage groove is provided inside the seal, and the storage groove is filled with grease. A sealing body is fixedly connected to the outer periphery of the seal, and the sealing body and the dustproof groove cooperate with each other to form a dustproof structure of the working area; The retaining frame is composed of a first assembly frame and a second assembly frame that cooperate with each other. A plurality of bending plates are fixedly connected to the right side of the first assembly frame. The bending plates and the second assembly frame cooperate with each other to form a rolling body limiting structure.

2. The bearing for an EGR electronically controlled valve according to claim 1, characterized in that: The sealing body includes a trapezoidal notch on one side of the outer periphery away from the working area, and a second circular arc groove is provided on the opposite side of the trapezoidal notch on the sealing body. The radius of the second circular arc groove is greater than the radius of the first circular arc groove. The trapezoidal notch, the second circular arc groove and the dustproof groove are interference fit to form a dust-isolating structure.

3. The bearing for an EGR electronically controlled valve according to claim 1, characterized in that: The storage grooves are L-shaped, each storage groove is connected to the working area, and the inner edge of each sealing body is a slope and is gap-matched with the inner ring.

4. The bearing for an EGR electronically controlled valve according to claim 1, characterized in that: The sealing element and the sealing body are both made of fluororubber.

5. The bearing for an EGR electronically controlled valve according to claim 1, characterized in that: The lubricating grease is polytetrafluoroethylene lubricating grease.

6. The bearing for an EGR electronically controlled valve according to claim 1, characterized in that: The first assembly frame and the second assembly frame are both made of stainless steel.

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