Double-row angular contact ball bearing

Abstract

The utility model discloses a double row angular contact ball bearing, including bearing outer ring, bearing inner ring combination and sealing element, bearing outer ring is sleeved in bearing inner ring combination outside, and the bearing outer ring and bearing inner ring combination between formed have two symmetrical settings raceway groove, and each raceway groove corresponds to install a group of spheroidal roller, and each group spheroidal roller is matched with a retainer, and two sealing elements are respectively symmetrically installed in the left and right ends of bearing, and the sealing element is installed between the position of bearing outer ring and bearing inner ring combination, and the sealing element corresponds to install in the outside of spheroidal roller, the utility model discloses through the improvement to contact angle, sealing element and bearing inner ring structure, makes the axial carrying capacity of bearing product, the sealing property, the assembly convenience, the use stability aspect all can bring the remarkable promotion, can satisfy the use demand in washing machine equipment.

Description

Technical Field

[0001] This utility model relates to the field of bearing design technology, and more specifically, to a double-row angular contact ball bearing. Background Technology

[0002] Angular contact ball bearings can withstand both radial and axial loads simultaneously and operate at high speeds, making them widely used in various types of mechanical equipment. Angular contact ball bearings are also used in washing machines. Given the special operating environment inside washing machines, washing machine manufacturers have raised requirements for the adaptability of the angular contact ball bearings they purchase. Therefore, the company has made design improvements to the angular contact ball bearings in terms of axial load capacity, sealing performance, ease of assembly, and operational stability, leading to this case study. Utility Model Content

[0003] The purpose of this invention is to address the needs of using angular contact ball bearings in washing machines by providing a double-row angular contact ball bearing. Through improvements to the contact angle, seals, and inner ring structure, this invention significantly enhances the axial load capacity, sealing performance, ease of assembly, and stability of the bearing, thus meeting the requirements for use in washing machines.

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

[0005] A double-row angular contact ball bearing includes an outer ring, an inner ring assembly, and seals. The outer ring is fitted onto the outside of the inner ring assembly. Two symmetrically arranged raceway grooves are formed between the outer ring and the inner ring assembly. A set of spherical rollers is installed in each raceway groove. Each set of spherical rollers is fitted with a cage. Two seals are symmetrically installed at the left and right ends of the bearing, respectively. The seals are installed between the outer ring and the inner ring assembly, and are installed on the outside of the spherical rollers.

[0006] Furthermore, the bearing inner ring assembly includes a first inner ring and a second inner ring, the first inner ring and the second inner ring having the same structure and being symmetrically installed, and the two raceway grooves being respectively set for the first inner ring and the second inner ring.

[0007] Furthermore, both the first inner ring and the second inner ring are provided with ramp sections, and the first inner ring and the second inner ring are installed in such a way that the ramp sections abut against each other.

[0008] Furthermore, both the first inner ring and the second inner ring have grooves, the high point of the ramp section extends to connect with the grooves, and the inner diameter side end face of the retainer has a number of evenly distributed anti-hooks, so that the insertion of the first inner ring and the second inner ring can allow the anti-hooks to slide into the grooves.

[0009] Furthermore, the sealing element includes a skeleton and an adhesive. The skeleton is made of metal material, and the adhesive covers and connects to the outside of the skeleton. The skeleton has a straight elongated head at its outer diameter end. The inner wall of the bearing outer ring is provided with a bayonet. The elongated head is fitted into the bayonet. One end of the adhesive partially covers the elongated head to form a lip, and the other end of the adhesive extends beyond the skeleton at its inner diameter end to form a lip foot.

[0010] Furthermore, the inner wall of the outer ring of the bearing is provided with a sealing slope, the sealing slope is connected to a bayonet, the sealing slope has a taper, and the lip is in close contact with the sealing slope.

[0011] Furthermore, the lip of the colloid includes a main lip and a secondary lip, which are integrally connected but branched into an inverted V shape, and both the main lip and the secondary lip abut against the outer wall of the inner ring assembly of the bearing.

[0012] Furthermore, a groove is formed on the main lip, and a coiled spring is installed in the groove.

[0013] Furthermore, the outer ring of the bearing is symmetrically provided with narrow diameter sections at both ends, the diameter of which is smaller than the standard outer diameter of the outer ring of the bearing.

[0014] Furthermore, the contact angle of the bearing is set as angle C, and angle C is set to 45 degrees.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model increases the bearing contact angle to 45 degrees to improve the bearing's axial load capacity. This utility model also improves the design of the seal, enhancing the sealing capacity at both the lip head and lip foot positions, giving the bearing excellent waterproof, dustproof, and grease-sealing effects, and significantly extending the bearing's service life.

[0017] 2. This utility model adopts a double inner ring combination structure, which makes bearing assembly more convenient. This utility model prevents the inner ring from escaping by designing a reverse hook on the cage, making the bearing less likely to fall apart and significantly improving the stability of the bearing. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of a double-row angular contact ball bearing in this embodiment;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0020] Figure 3 for Figure 1 Enlarged view at point B in the image.

[0021] Reference numerals: 1. Outer ring of bearing; 11. Bayonet; 12. Sealing slope; 13. Narrow diameter section; 2. Inner ring assembly of bearing; 21. First inner ring; 21. Groove; 211. Ramp section; 212. Second inner ring; 22. Raceway groove; 3. Ball roller; 4. Cage; 5. Reverse hook; 51. Seal; 6. Skeleton; 61. Long head; 611. Colloid; 62. Lip; 621. Main lip; 622. Secondary lip; 623. Groove; 624. Coil spring; 625. Detailed Implementation

[0022] 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.

[0023] like Figures 1-3 The double-row angular contact ball bearing shown includes an outer ring 1, an inner ring assembly 2, and seals 6. The outer ring 1 is fitted onto the outside of the inner ring assembly 2. To facilitate bearing assembly, the inner ring assembly 2 is designed to include a first inner ring 21 and a second inner ring 22. The first inner ring 21 and the second inner ring 22 have the same structure and are symmetrically installed. Two symmetrically arranged raceway grooves 3 are formed between the outer ring 1 and the inner ring assembly 2. The two raceway grooves 3 are respectively set to correspond to the first inner ring 21 and the second inner ring 22. A set of spherical rollers 4 are installed in each raceway groove 3. Each set of spherical rollers 4 is equipped with a cage 5. The cage 5 serves to separate the installation of the spherical rollers 4. The spherical rollers 4 are evenly distributed circumferentially on the cage 5. Two seals 6 are symmetrically installed at the left and right ends of the bearing. The seals 6 are installed between the outer ring 1 and the inner ring assembly 2, corresponding to the outside of the spherical rollers 4. The seals 6 provide a sealing effect at both ends of the bearing.

[0024] like Figure 1 As shown, in order to improve the axial load capacity of the bearing, the contact angle of the bearing of this utility model is set to angle C, which is set to 45 degrees. When the bearing is used in washing machine equipment, the requirements for axial load capacity are relatively high. The above-mentioned 45-degree contact angle design is to meet the needs of the bearing when used in washing machine equipment.

[0025] like Figure 1 As shown, the present invention divides the bearing inner ring assembly 2 into two parts: a first inner ring 21 and a second inner ring 22. While this facilitates bearing assembly, it also increases the risk of the bearing easily falling apart. To address these issues, the present invention employs an improved design, as follows: Figure 1 and Figure 3As shown, firstly, this invention forms several evenly distributed anti-hooks 51 (axially evenly distributed on the inner diameter side) on the inner diameter side end face of the cage 5. Secondly, this invention provides grooves 211 on both the first inner ring 21 and the second inner ring 22. When the first inner ring 21 and the second inner ring 22 are installed in place, the anti-hooks 51 slide into the grooves 211. The anti-hooks 51 can prevent the first inner ring 21 and the second inner ring 22 from escaping, thus solving the problem of bearing disintegration and significantly improving the stability of bearing use. The design of the anti-hooks 51 also brings difficulties to the installation of the first inner ring 21 and the second inner ring 22. In order to facilitate the smooth installation of the first inner ring 21 and the second inner ring 22, this invention provides a ramp section 212 on both the first inner ring 21 and the second inner ring 22. The high point of the ramp section 212 extends to connect to the groove 211. The inner rings 22 are installed by pushing them in from the outside in, so that the ramp sections 212 of the two inner rings can finally abut against each other. The anti-hook 51 of this utility model is designed with a similar arc shape. When the first inner ring 21 and the second inner ring 22 are installed, the anti-hook 51 slides on the ramp section 212 and slides from low to high. The arc-shaped anti-hook 51 can gradually squeeze and deform (small deformation) until it finally slides into the groove 211 to release the deformation. The design of the ramp section 212 solves the problem of installing the first inner ring 21 and the second inner ring 22 in place. After the anti-hook 51 enters the groove 211, the deformation is released, which will effectively prevent the first inner ring 21 and the second inner ring 22 from escaping (when assembling this bearing, first install the spherical roller 4 and the cage 5 in the outer ring 1 of the bearing, and then push in the first inner ring 21 and the second inner ring 22 from the left and right sides respectively).

[0026] like Figure 2As shown, the seal 6 includes a skeleton 61 and a rubber body 62. The skeleton 61 is made of metal, and the rubber body 62 is made of rubber. The rubber body 62 covers and connects to the outside of the skeleton 61. The skeleton 61 has a "7"-shaped cross-section. The skeleton 61 has a straight long head 611 at its outer diameter end. The inner wall of the bearing outer ring 1 has a bayonet 11, and the long head 611 is fitted into the bayonet 11. The long head 611 of the skeleton 61 is relatively long, and the long head 611 and the bayonet 11 are tightly fitted to make the installation and fixation of the seal 6 more reliable. One end of the rubber body 62 covers the long head 611 to form a lip 621, and the other end of the rubber body 62 extends beyond the inner diameter end of the skeleton 61 to form a lip foot. The skeleton 61 is actually a disc-shaped body. The lip 621 is at the outer diameter end and needs to form a seal at the bearing outer ring 1. The lip foot is at the inner diameter end and needs to form a seal at the bearing inner ring. To achieve a proper seal, this invention features a sealing slope 12 on the inner wall of the outer ring 1 of the bearing. The sealing slope 12 connects to a retainer 11 and has a tapered shape. When the seal 6 is installed, as the long head 611 is gradually pushed into the retainer 11, the lip 621 is deformed by the sealing slope 12, ensuring it tightly contacts the sealing slope 12. The deeper the long head 611 is inserted into the retainer 11, the better the sealing effect of the lip 621. The lip of the colloid 62 includes a main lip 622 and a secondary lip 623, which are integrally connected but bifurcated into an inverted V-shape. Both the main lip 622 and the secondary lip 623 abut against the outer wall of the bearing inner ring assembly 2 with their inner diameter ends. During bearing use, the bearing inner ring moves; therefore, a more reliable seal is required for the bearing inner ring. The main lip 622 and the secondary lip 623 form a double-layered seal to improve sealing performance. The secondary lip 623 is mainly used to prevent the escape of lubricating grease (lubricating grease is added inside the bearing). The main lip 622 needs to block water and dust from the external environment. In this invention, the main lip 622 is designed to be thicker, and a groove 624 is formed on the main lip 622. A coiled spring 625 is embedded in the groove 624. The coiled spring 625 is ring-shaped (also called a ring spring coil). Due to the limited space in the groove 624, the coiled spring 625 is compressed to form outward tension. The outward tension formed by the coiled spring 625 can force the main lip 622 to form continuous and stable contact with the outer wall of the inner ring of the bearing, so as to ensure the reliability and continuity of the sealing effect. The sealing element 6 of this invention forms an excellent sealing effect at both the inner and outer ring positions of the bearing, so that the bearing has good waterproof, dustproof and grease sealing effects, which meets the needs of washing machine equipment (the washing machine equipment will have a water environment, so the waterproof effect must be good. The service life of the bearing determines the user experience of the washing machine. With good dustproof and grease sealing effects, the service life of the bearing is significantly improved).

[0027] To reduce the difficulty of bearing installation, the left and right ends of the bearing outer ring 1 are symmetrically provided with narrow diameter sections 13. The narrow diameter sections 13 only serve as installation guides. The diameter of the narrow diameter sections 13 is slightly smaller than the standard outer diameter of the bearing outer ring 1, generally not exceeding 0.4 mm. The length of the narrow diameter sections 13 does not exceed one-tenth of the total length of the bearing outer ring 1.

[0028] 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 double-row angular contact ball bearing, characterized in that, The bearing includes an outer ring (1), an inner ring assembly (2), and seals (6). The outer ring (1) is fitted onto the outside of the inner ring assembly (2). Two symmetrically arranged raceway grooves (3) are formed between the outer ring (1) and the inner ring assembly (2). A set of spherical rollers (4) are installed in each raceway groove (3). Each set of spherical rollers (4) is equipped with a cage (5). Two seals (6) are symmetrically installed at the left and right ends of the bearing. The seals (6) are installed between the outer ring (1) and the inner ring assembly (2). The seals (6) are installed on the outside of the spherical rollers (4). The seals (6) include a skeleton (61) and a colloid (62). The skeleton (61) is made of metal. The colloid (62) covers and connects to the outside of the skeleton (61). The skeleton (61) has a straight long head (611) at its outer diameter end. The inner wall of the outer ring (1) of the bearing is provided with a bayonet (11). The long head (611) is fitted into the bayonet (11). One end of the colloid (62) partially covers the long head (611) to form a lip (621). The other end of the colloid (62) extends beyond the skeleton (61) to form a lip foot at the inner diameter end. The inner wall of the outer ring (1) of the bearing is provided with a sealing slope (12). The sealing slope (12) connects to the bayonet (11). The sealing slope (12) has a taper. The lip (621) is in close contact with the sealing slope (12). The lip foot of the colloid (62) includes a main lip (622) and a secondary lip (623). The main lip (622) and the secondary lip (623) are integrally connected but bifurcated into an inverted V shape. The main lip (622) and the secondary lip (623) both abut against the outer wall of the inner ring assembly (2) of the contact bearing. A groove (624) is formed on the main lip (622). A coiled spring (625) is installed in the groove (624).

2. The double-row angular contact ball bearing according to claim 1, characterized in that, The bearing inner ring assembly (2) includes a first inner ring (21) and a second inner ring (22). The first inner ring (21) and the second inner ring (22) have the same structure and are installed symmetrically. The two raceway grooves (3) are respectively set to correspond to the first inner ring (21) and the second inner ring (22).

3. The double-row angular contact ball bearing according to claim 2, characterized in that, Both the first inner ring (21) and the second inner ring (22) are provided with ramp sections (212), and the first inner ring (21) and the second inner ring (22) are installed in such a way that the ramp sections (212) abut against each other.

4. The double-row angular contact ball bearing according to claim 3, characterized in that, The first inner ring (21) and the second inner ring (22) are provided with grooves (211), the high point of the ramp section (212) extends to connect with the grooves (211), and the inner diameter side end face of the retainer (5) is formed with a number of evenly distributed reverse hooks (51). The insertion of the first inner ring (21) and the second inner ring (22) allows the reverse hooks (51) to slide into the grooves (211).

5. A double-row angular contact ball bearing according to claim 1, characterized in that, The bearing outer ring (1) has symmetrically arranged fine diameter sections (13) at both ends, and the diameter of the fine diameter section (13) is smaller than the standard outer diameter of the bearing outer ring (1).

6. A double-row angular contact ball bearing according to claim 1, characterized in that, The contact angle of the bearing is set as angle C, and angle C is set to 45 degrees.

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