Shaft coupling bearing for a water pump system

Abstract

This utility model discloses a shaft-connecting bearing for a water pump system, including a shaft body, a middle ring, and an outer ring. The middle ring is fitted onto the outside of the shaft body, and the outer ring is fitted onto the outside of the middle ring. A first raceway groove and a second raceway groove are formed between the middle ring and the shaft body. A first small ball roller group and a second small ball roller group are respectively installed in the first raceway groove and the second raceway groove. A third raceway groove is formed between the outer ring and the middle ring, and a large ball roller group is installed in the third raceway groove. A cylindrical roller group is also installed between the outer ring and the middle ring. The outer ring is used for mounting water pump components, and the middle ring is used for mounting cooling fan components. This utility model forms a stepped connection effect by sequentially fitting the middle ring and the outer ring onto the outside of the shaft body. The shared needs of the cooling fan and the water pump can be met simultaneously on the same set of bearings. This utility model meets the requirements for miniaturization and compact design of bearings, and can achieve the purpose of cost reduction, efficiency improvement, and optimization of the structure of vehicle water pump systems.

Description

Technical Field

[0001] This utility model relates to the field of bearing product technology, and more specifically, to a shaft bearing for a water pump system. Background Technology

[0002] Vehicle water pump systems include cooling fans and water pumps. With fierce market competition, vehicle water pump systems are gradually developing towards miniaturization and intensification. This forces companies to carry out technological innovation and upgrading to achieve integrated application functions with minimal resources. The existing vehicle water pump system requires two different sets of bearings for installation and connection, resulting in a relatively bulky structure. There is room for technological upgrading. Therefore, companies need to develop a rotary support bearing that can be used for both cooling fans and water pumps to meet market demand. This case arises from this. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a shaft connection bearing for a water pump system. This utility model uses an inner ring and an outer ring to be sequentially fitted onto the outside of the shaft to form a stepped connection effect. The common needs of the cooling fan and the water pump can be met simultaneously on the same set of bearings. This utility model meets the requirements of miniaturization and compact design of bearings, and can achieve the purpose of reducing costs, increasing efficiency and optimizing the structure of vehicle water pump systems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A shaft bearing for a water pump system includes a shaft body, a middle raceway, and an outer raceway. The middle raceway is fitted onto the outside of the shaft body, and the outer raceway is fitted onto the outside of the middle raceway. A first raceway groove and a second raceway groove are formed between the middle raceway and the shaft body. A first set of small ball rollers and a second set of small ball rollers are respectively installed in the first raceway groove and the second raceway groove. A third raceway groove is formed between the outer raceway and the middle raceway, and a set of large ball rollers is installed in the third raceway groove. A set of cylindrical rollers is also installed between the outer raceway and the middle raceway. The outer raceway is used for mounting water pump components, and the middle raceway is used for mounting cooling fan components.

[0006] Furthermore, the large ball roller group and the second small ball roller group are spatially misaligned, and the minimum straight-line distance between the second raceway groove and the third raceway groove is greater than the thickness of the middle raceway.

[0007] Furthermore, the length of the middle collar is greater than the length of the outer collar, and the section of the middle collar exposed outside the outer collar is designated as an extension section, which is used to install the cooling fan component.

[0008] Furthermore, a stop flange is formed on the outer side of the extended section.

[0009] Furthermore, a gap space is left between the stop flange and the outer ring, and an oil injection nozzle is installed in this gap space.

[0010] Furthermore, a first oil cavity is formed between the first small ball roller group and the second small ball roller group, and a second oil cavity is formed between the large ball roller group and the cylindrical roller group. A first oil passage and a second oil passage are provided on the middle ring. One end of the first oil passage is connected to the oil injection nozzle, and the other end of the first oil passage is connected to the first oil cavity. One end of the second oil passage is connected to the first oil cavity, and the other end is connected to the second oil cavity.

[0011] Furthermore, both sides of the outer ring and the middle ring are equipped with seals. The middle ring has an inner groove inside the extended section. The seal on one side of the middle ring is inserted into the inner groove to form an installation effect close to the first small ball roller assembly.

[0012] The beneficial effects of this utility model are:

[0013] 1. The present invention has a reasonable structural layout. By sequentially fitting the middle ring and the outer ring onto the outside of the shaft, a tiered connection effect is formed. The middle ring is used to install the cooling fan, and the outer ring is used to install the water pump. In this way, the common needs of the cooling fan and the water pump can be met on the same set of bearings. The present invention has the advantage of small overall space and can achieve the purpose of reducing costs, increasing efficiency, and optimizing the structure of the vehicle water pump system.

[0014] 2. This utility model utilizes the stepped assembly structure of the rings to rationally design the oil passage, which not only facilitates oil filling but also allows for oil synergy between the two oil chambers, effectively ensuring the bearing's performance and service life. Attached Figure Description

[0015] Figure 1 This is a half-sectional schematic diagram of a shaft-connected bearing for a water pump system in this embodiment.

[0016] Reference numerals: Shaft 1, Middle Ring 2, Extension Section 21, Stop Flange 22, Oil Nozzle 23, First Oil Passage 24, Second Oil Passage 25, Inner Groove 26, Outer Ring 3, First Raceway Groove 4, First Small Ball Roller Group 41, Second Raceway Groove 5, Second Small Ball Roller Group 51, First Oil Chamber 52, Third Raceway Groove 6, Large Ball Roller Group 61, Cylindrical Roller Group 7, Second Oil Chamber 71, Seal 8. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1 The diagram illustrates a shaft bearing for a water pump system, comprising a shaft body 1, a middle raceway 2, and an outer raceway 3. The middle raceway 2 is fitted onto the outside of the shaft body 1, and the outer raceway 3 is fitted onto the outside of the middle raceway 2. A first raceway groove 4 and a second raceway groove 5 are formed between the middle raceway 2 and the shaft body 1. A first small ball roller assembly 41 and a second small ball roller assembly 51 are respectively installed in the first raceway groove 4 and the second raceway groove 5. A third raceway groove 6 is formed between the outer raceway 3 and the middle raceway 2, and a large ball roller assembly 61 is installed in the third raceway groove 6. A cylindrical roller assembly 7 is also installed between the outer raceway 3 and the middle raceway 2. The outer raceway 3 is used for mounting water pump components. Since the outer raceway 3 needs to bear a large radial load, a combination of cylindrical rollers and spherical rollers is designed. The middle raceway 2 is used for mounting cooling fan components. This utility model... The length of the middle ring 2 is designed to be greater than the length of the outer ring 3, meaning that a section of the middle ring 2 will be exposed outside the outer ring 3. This exposed section of the middle ring 2 is designated as an extension section 21. The extension section 21 is used to install the cooling fan component without interfering with the water pump component installed on the outer ring 3. In this invention, the middle ring 2 and the outer ring 3 are assembled in a stepped manner to form a bearing. This bearing can meet the connection requirements of both the water pump component and the cooling fan component. This invention achieves the design requirements of miniaturization and compactness. This invention has the advantage of small overall space and lower production cost than the original two sets of bearings, which can reduce costs, increase efficiency, and optimize the structure of the vehicle water pump system (the vehicle water pump system can also be made smaller).

[0019] This invention places the second small ball roller group 51 below the large ball roller group 61 to achieve a good load-bearing effect. However, the large ball roller group 61 and the second small ball roller group 51 need to be spatially offset (not directly below each other). This is because both the second raceway groove 5 and the third raceway groove 6 have a groove on the middle ring 2 (one on the outer wall of the middle ring 2 and one on the inner wall of the middle ring 2). If the large ball roller group 61 and the second small ball roller group 51 are vertically opposite each other, the opening of the two grooves will make the middle ring 2 weak at the grooved position. Therefore, the large ball roller group 61 and the second small ball roller group 51 need to be offset. Specifically, the minimum straight-line distance between the grooves of the second raceway groove 5 and the third raceway groove 6 on the middle ring 2 is set to be greater than the thickness of the middle ring 2. In this way, the opening of the raceway grooves will not affect the strength of the middle ring 2.

[0020] This invention features a stop flange 22 protruding from the outside of the extension section 21. The stop flange 22 restricts the installation position of the cooling fan component, preventing it from contacting the water pump component after installation. Figure 1 As shown, the outer ring 3 is installed from the right side, and the cooling fan component is installed from the left side.

[0021] Lubricating oil (grease-like) needs to be added inside the bearing. This lubricating oil reduces friction and wear during bearing operation and extends bearing life. However, the lubricating oil is consumed during bearing use, so it needs to be added after a period of use. This invention is a combined bearing, which presents certain challenges in designing the lubrication structure. Firstly, a gap is left between the stop flange 22 and the outer ring 3, which is precisely where the grease nipple 23 is installed. This invention forms a first oil cavity 52 between the first small ball roller group 41 and the second small ball roller group 51, and a second oil cavity 71 between the large ball roller group 61 and the cylindrical roller group 7. The first oil cavity 52 and the second oil cavity 71 are used to store lubricating grease. The middle ring 2 has a first oil passage 24 and a second oil passage 25. One end of the first oil passage 24 is connected to the grease nipple. The other end of the grease nipple 23 and the first oil passage 24 are connected to the first oil chamber 52. The grease nipple 23 is normally kept closed to prevent foreign matter from entering the bearing. When injecting grease, the grease first enters the first oil chamber 52 through the first oil passage 24. One end of the second oil passage 25 is connected to the first oil chamber 52, and the other end is connected to the second oil chamber 71. After the first oil chamber 52 is filled, the grease enters the second oil chamber 71 through the second oil passage 25. Multiple grease nipples 23 can be evenly distributed along the diameter of the middle ring 2. Multiple first oil passages 24 and second oil passages 25 are also provided accordingly. The second advantage of connecting the first oil chamber 52 and the second oil chamber 71 is that during the use of the bearing, the two oil chambers can form a mutual oil supply, and there will be no situation where one of the oil chambers is completely without oil. This design can effectively ensure the performance and service life of the bearing.

[0022] This utility model has seals 8 installed on both sides of the outer ring 3 and the middle ring 2. The seals 8 can prevent dust and water, and prevent foreign matter from entering the bearing, so as to ensure the normal operation of the bearing. The middle ring 2 has an inner groove 26 inside the extension section 21. The seal 8 on one side of the middle ring 2 is inserted into the inner groove 26 to form an installation effect close to the first small ball roller group 41, thus forming an effective seal close to the first small ball roller group 41.

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A shaft bearing for a water pump system, characterized in that, The device includes a shaft (1), a middle ring (2), and an outer ring (3). The middle ring (2) is fitted onto the outside of the shaft (1), and the outer ring (3) is fitted onto the outside of the middle ring (2). A first raceway groove (4) and a second raceway groove (5) are formed between the middle ring (2) and the shaft (1). A first small ball roller group (41) and a second small ball roller group (51) are respectively installed in the first raceway groove (4) and the second raceway groove (5). A third raceway groove (6) is formed between the outer ring (3) and the middle ring (2). A large ball roller group (61) is installed in the third raceway groove (6). A cylindrical roller group (7) is also installed between the outer ring (3) and the middle ring (2). The outer ring (3) is used for the installation of water pump components, and the middle ring (2) is used for the installation of cooling fan components.

2. The shaft bearing for a water pump system according to claim 1, characterized in that, The large ball roller group (61) and the second small ball roller group (51) are spatially misaligned, and the minimum straight-line distance between the second raceway groove (5) and the third raceway groove (6) is greater than the thickness of the middle ring (2).

3. The shaft bearing for a water pump system according to claim 1, characterized in that, The length of the middle collar (2) is greater than the length of the outer collar (3). The section of the middle collar (2) exposed outside the outer collar (3) is designated as an extension section (21), which is used to install the cooling fan component.

4. The shaft bearing for a water pump system according to claim 3, characterized in that, The extension section (21) has a ring of stop flange (22) protruding outward.

5. The shaft bearing for a water pump system according to claim 4, characterized in that, There is a gap between the stop flange (22) and the outer ring (3), and an oil injection nozzle (23) is installed in the gap.

6. The shaft bearing for a water pump system according to claim 5, characterized in that, A first oil cavity (52) is formed between the first small ball roller group (41) and the second small ball roller group (51), and a second oil cavity (71) is formed between the large ball roller group (61) and the cylindrical roller group (7). A first oil passage (24) and a second oil passage (25) are provided on the middle ring (2). One end of the first oil passage (24) is connected to the oil nozzle (23), and the other end of the first oil passage (24) is connected to the first oil cavity (52). One end of the second oil passage (25) is connected to the first oil cavity (52), and the other end is connected to the second oil cavity (71).

7. The shaft bearing for a water pump system according to claim 3, characterized in that, Both sides of the outer ring (3) and the middle ring (2) are equipped with seals (8). The middle ring (2) has an inner groove (26) inside the extension section (21). The seal (8) on one side of the middle ring (2) is inserted into the inner groove (26) to form an installation effect close to the first small ball roller assembly (41).

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