Anti-resorption bearing and dental handpiece

Abstract

The utility model discloses an anti-resorption bearing and a dental handpiece. The anti-resorption bearing comprises an outer ring, a retainer, an inner ring, balls and an anti-resorption elastic ring, the inner ring is positioned in the outer ring; the retainer is mounted between the outer ring and the inner ring; a mounting groove is formed in the retainer, the balls are mounted in the mounting groove in a rolling manner, and the balls are respectively matched with the outer ring and the inner ring in a rolling manner; the side, close to the central axis of the inner ring, of the anti-resorption elastic ring forms an inner side, and the side, away from the central axis of the inner ring, of the anti-resorption elastic ring forms an outer side; the outer side of the anti-resorption elastic ring is fixed to the outer ring, and the inner side of the anti-resorption elastic ring is used for being matched with the inner ring in a sealed mode. Solid, liquid and gas can be prevented from entering the bearing, and the problem that water mist is sucked back into the bearing to pollute the bearing can be solved; moreover, the structure is simple, the installation is simple and convenient, and the popularization is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of bearings, in particular to an anti-backflow suction bearing and a dental handpiece. Background Art

[0002] As a component for supporting a mechanical rotating body, reducing the friction coefficient during its movement, and ensuring its rotational accuracy, a bearing is often widely used in the mechanical field. The existing bearing includes an outer ring, a cage, an inner ring, a stainless steel sheet, and rolling balls; the inner ring is located inside the outer ring; the cage is installed between the outer ring and the inner ring; the rolling balls are rotatably installed on the cage, and the rolling balls are respectively in rolling cooperation with the outer ring and the inner ring; the stainless steel sheet is arranged between the outer ring and the inner ring. Although the existing bearing can prevent solid particles such as dust from entering the bearing interior through the stainless steel sheet, when the bearing is applied to a dental handpiece, during the operation, there is a problem that water mist is easily sucked back into the bearing interior and pollutes the bearing. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, one of the purposes of the utility model is to provide an anti-backflow suction bearing, which can use the inner side of the anti-backflow suction elastic ring to be in sealing cooperation with the inner ring, and can reduce the problem that water mist is sucked back into the bearing interior and pollutes the bearing.

[0004] Another purpose of the utility model is to provide a dental handpiece, which adopts the above anti-backflow suction bearing, and can use the inner side of the anti-backflow suction elastic ring to be in sealing cooperation with the inner ring, and can reduce the problem that water mist is sucked back into the bearing interior and pollutes the bearing.

[0005] One of the purposes of the utility model is realized by adopting the following technical solutions:

[0006] An anti-backflow suction bearing includes an outer ring, a cage, an inner ring, rolling balls, and an anti-backflow suction elastic ring; the inner ring is located inside the outer ring; the cage is installed between the outer ring and the inner ring; an installation groove is provided on the cage, the rolling balls are rotatably installed in the installation groove, and the rolling balls are respectively in rolling cooperation with the outer ring and the inner ring; one side of the anti-backflow suction elastic ring close to the central axis of the inner ring forms an inner side, and one side of the anti-backflow suction elastic ring far from the central axis of the inner ring forms an outer side; the outer side of the anti-backflow suction elastic ring is fixed on the outer ring, and the inner side of the anti-backflow suction elastic ring is used for sealing cooperation with the inner ring.

[0007] A conical surface is provided on the inner ring, and the inner side of the anti-backflow suction elastic ring is used for sealing cooperation with the conical surface of the inner ring.

[0008] The inner ring includes a main ring body and a fitting portion; the fitting portion is arranged at one end of the main ring body; the conical surface is arranged on the fitting portion; from the end of the conical surface far from the main ring body to the end close to the main ring body, the diameter of the conical surface gradually increases.

[0009] On the inner side of the anti-backflow suction elastic ring, there is a resilient ring portion for sealingly mating with the inner ring.

[0010] From the side of the resilient ring portion close to the inner ring to the side far from the inner ring, the thickness of the resilient ring portion gradually increases.

[0011] The anti-backflow suction elastic ring further includes a main ring body, and the resilient ring portion is arranged on the main ring body.

[0012] The outer ring is provided with a groove, and the outer side of the anti-backflow suction elastic ring is installed in the groove of the outer ring.

[0013] This anti-backflow suction bearing further includes a resisting member, which is installed on the outer ring and is used for abutting against the outer side of the anti-backflow suction elastic ring; the resisting member includes a retaining ring clamped on the outer ring.

[0014] This anti-backflow suction bearing includes a plurality of balls; a plurality of mounting grooves are provided on the cage, and the plurality of balls are respectively and correspondingly installed in the plurality of mounting grooves.

[0015] The second object of the present utility model is achieved by adopting the following technical solutions:

[0016] A dental handpiece includes the above-mentioned anti-backflow suction bearing.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: By adopting the combination of an outer ring, a cage, an inner ring, balls and an anti-backflow suction elastic ring, when the dental handpiece stops after working, the inner side of the anti-backflow suction elastic ring can be used to sealingly mate with the inner ring, which can prevent solids, liquids and gases from entering the bearing, and can reduce the problem of water mist backflow into the bearing interior and polluting the bearing; moreover, its structure is simple, the installation is convenient, and the cost can be effectively controlled. Description of the Drawings

[0018] Figure 1 It is a schematic structural view of the anti-backflow suction bearing of the present utility model;

[0019] Figure 2 It is an exploded view of the anti-backflow suction bearing of the present utility model;

[0020] Figure 3 It is a cross-sectional view of the anti-backflow suction bearing of the present utility model;

[0021] Figure 4 It is a cross-sectional view of another embodiment of the anti-backflow suction bearing of the present utility model;

[0022] Among them, 10 is the outer ring; 11 is the groove; 20 is the cage; 21 is the mounting groove; 30 is the inner ring; 31 is the conical surface; 32 is the main ring body; 33 is the mating part; 40 is the ball; 50 is the anti-backflow elastic ring; 51 is the outer side; 52 is the inner side; 53 is the resilient ring part; 54 is the main ring body; 55 is the positioning ring; 56 is the positioning groove; 60 is the blocking member. Detailed implementation manners

[0023] Next, in combination with the accompanying drawings and specific implementation manners, the present utility model will be further described. It should be noted that, on the premise of no conflict, any combination of the following-described embodiments or technical features can form a new embodiment.

[0024] As Figures 1-3 shown, an anti-backflow bearing includes an outer ring 10, a cage 20, an inner ring 30, balls 40 and an anti-backflow elastic ring 50; the inner ring 30 is located inside the outer ring 10; the cage 20 is installed between the outer ring 10 and the inner ring 30; an installation groove 21 is provided on the cage 20, the balls 40 are rotatably installed in the installation groove 21, and the balls 40 are respectively in rolling cooperation with the outer ring 10 and the inner ring 30; one side of the anti-backflow elastic ring 50 close to the central axis of the inner ring 30 is formed as the inner side 52, and one side of the anti-backflow elastic ring 50 away from the central axis of the inner ring 30 is formed as the outer side 51; the outer side 51 of the anti-backflow elastic ring 50 is fixed on the outer ring 10, and the inner side 52 of the anti-backflow elastic ring 50 is used for sealing cooperation with the inner ring 30.

[0025] When the dental handpiece stops working after operation, the inner side 52 of the anti-backflow elastic ring 50 rebounds under its own elastic force and is in sealing cooperation with the inner ring 30, which can achieve a quick closing effect, prevent solids, liquids and gases from entering the bearing, and reduce the problem of water mist backflow into the bearing interior and polluting the bearing; moreover, its structure is simple, the installation is convenient, and the cost can be effectively controlled.

[0026] Specifically, the anti-backflow bearing includes a plurality of balls 40; a plurality of installation grooves 21 are provided on the cage 20, and the plurality of balls 40 are respectively installed in the plurality of installation grooves 21 in a one-to-one correspondence.

[0027] A conical surface 31 is provided on the inner ring 30, and the inner side 52 of the anti-backflow elastic ring 50 is used for sealing cooperation with the conical surface 31 of the inner ring 30. Specifically, the inner ring 30 includes a main ring body 32 and a fitting portion 33; the fitting portion 33 is provided at one end of the main ring body 32; the conical surface 31 is provided on the fitting portion 33; from the end of the conical surface 31 far from the main ring body 32 to the end close to the main ring body 32, the diameter of the conical surface 31 gradually increases. When the dental handpiece stops working after operation, the inner side 52 of the anti-backflow elastic ring 50 rebounds to seal with the conical surface 31 of the inner ring 30. Since the diameter of the conical surface 31 gradually increases from the end far from the main ring body 32 to the end close to the main ring body 32, the inner side 52 of the anti-backflow elastic ring 50 is closely attached to the conical surface 31 under the action of the water mist pressure, so as to further improve the sealing performance between the anti-backflow elastic ring 50 and the inner ring 30.

[0028] A resilient ring portion 53 for sealing cooperation with the inner ring 30 is provided on the inner side 52 of the anti-backflow elastic ring 50. Specifically, the thickness of the resilient ring portion 53 gradually increases from the side close to the inner ring 30 to the side far from the inner ring 30. By adopting the above setting, it is convenient for the resilient ring portion 53 to elastically recover and seal with the inner ring 30.

[0029] Specifically, the anti-backflow elastic ring 50 further includes a main ring body 54, and the resilient ring portion 53 is provided on the main ring body 54.

[0030] A groove 11 is provided on the outer ring 10, and the outer side 51 of the anti-backflow elastic ring 50 is installed in the groove 11 of the outer ring 10. The anti-backflow bearing further includes a resisting member 60, which is installed on the outer ring 10 and is used for abutting against the outer side 51 of the anti-backflow elastic ring 50. By adopting the above setting, it is convenient to fix the anti-backflow elastic ring 50.

[0031] The resisting member 60 includes a retaining ring installed on the outer ring 10. By adopting the above setting, it is convenient to use the retaining ring to abut against the outer side 51 of the anti-backflow elastic ring 50 while reducing the cost.

[0032] Among them, the retaining ring can directly abut against the main ring body 54. Of course, in addition, the anti-backflow elastic ring 50 can also adopt a positioning ring 55 (as Figure 4 shown), a positioning groove 56 is provided on the inner side 52 of the main ring body 54, the positioning ring 55 is fixed in the positioning groove 56, and the retaining ring abuts against the positioning ring 55, which is also convenient for fixing the anti-backflow elastic ring 50.

[0033] The anti-backflow elastic ring 50 is a rubber ring, which can have a resilient effect and reduce the manufacturing cost at the same time.

[0034] Of course, in addition to this, the anti-backflow elastic ring 50 can also adopt any existing elastic rings on the market, such as a silicone ring. However, using a rubber ring as the anti-backflow elastic ring 50 is the most preferred embodiment of the present utility model, which can not only have a rebound effect but also reduce the manufacturing cost.

[0035] The present utility model also discloses a dental handpiece, which includes the above-mentioned anti-backflow bearing.

[0036] The above-mentioned embodiments are only the preferred embodiments of the present utility model, and the scope of protection of the present utility model cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A backflow prevention bearing, characterized in that: It includes an outer ring (10), a cage (20), an inner ring (30), balls (40) and an anti-backflow elastic ring (50); the inner ring (30) is located inside the outer ring (10); the cage (20) is installed between the outer ring (10) and the inner ring (30); an installation groove (21) is provided on the cage (20), the balls (40) are rollably installed in the installation groove (21), and the balls (40) are in rolling fit with the outer ring (10) and the inner ring (30) respectively; one side of the anti-backflow elastic ring (50) close to the central axis of the inner ring (30) forms an inner side (52), and one side of the anti-backflow elastic ring (50) away from the central axis of the inner ring (30) forms an outer side (51); the outer side (51) of the anti-backflow elastic ring (50) is fixed on the outer ring (10), and the inner side (52) of the anti-backflow elastic ring (50) is used for sealing cooperation with the inner ring (30).

2. The anti-backflow bearing according to claim 1, characterized in that: A conical surface (31) is provided on the inner ring (30), and the inner side (52) of the anti-backflow elastic ring (50) is used for sealing cooperation with the conical surface (31) of the inner ring (30).

3. The anti-backflow suction bearing according to claim 2, wherein: The inner ring (30) includes a main ring body (32) and a mating portion (33); the mating portion (33) is provided at one end of the main ring body (32); the conical surface (31) is provided on the mating portion (33); from the end of the conical surface (31) away from the main ring body (32) to the end close to the main ring body (32), the diameter of the conical surface (31) gradually increases.

4. The anti-backflow suction bearing according to any one of claims 1-3, characterized in that: A rebounding ring portion (53) for sealing cooperation with the inner ring (30) is provided on the inner side (52) of the anti-backflow elastic ring (50).

5. The anti-backflow suction bearing according to claim 4, wherein: From the side of the rebounding ring portion (53) close to the inner ring (30) to the side away from the inner ring (30), the thickness of the rebounding ring portion (53) gradually increases.

6. The anti-backflow suction bearing according to claim 5, characterized in that: The anti-backflow elastic ring (50) further includes a main ring body (54), and the rebounding ring portion (53) is provided on the main ring body (54).

7. The anti-backflow suction bearing according to claim 1, characterized in that: The outer ring (10) is provided with a groove (11), and the outer side (51) of the anti-backflow elastic ring (50) is installed in the groove (11) of the outer ring (10).

8. The anti-backflow bearing according to claim 1 or 7, characterized in that: It further includes a resisting member (60), the resisting member (60) is installed on the outer ring (10) and is used for abutting against the outer side (51) of the anti-backflow elastic ring (50); the resisting member (60) includes a retaining ring clamped on the outer ring (10).

9. The anti-backflow suction bearing according to claim 8, characterized in that: This anti-backflow bearing includes a plurality of balls (40); a plurality of installation grooves (21) are provided on the cage (20), and the plurality of balls (40) are respectively installed in the plurality of installation grooves (21) in one-to-one correspondence.

10. Dental handpiece, characterized in that: It includes the anti-backflow bearing according to any one of claims 1-9.

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