Needle bearing with adjustable outer ring

Abstract

The needle bearing comprises an inner ring, a needle roller and the outer ring, an adjustable damping mechanism is arranged on the inner end face of the outer ring and comprises a damping air bag and a pressure adjusting piston, an annular covered groove is formed in the inner end face of the outer ring, and a pressure adjusting cavity is formed in the side face of the annular covered groove. The damping air bag is fixedly installed in the annular covered groove, an air inlet is formed in the side face of the damping air bag, and the air inlet is in through connection with the bottom of the pressure adjusting cavity. The adjustable damping mechanism is arranged on the inner end face of the outer ring, the needle bearing has the advantages of saving space and being large in bearing load, the needle bearing has the advantages of a damping bearing, the application range of the bearing is greatly widened through the adjustable damping structure, the oil injection hole is formed in the upper end face of the outer ring, oil supplementation is facilitated when the bearing is used, and the service life of the bearing is prolonged. And the oil distribution holes are formed in the side faces of the oil injection holes, so that the oil injection uniformity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of needle roller bearings, in particular to a needle roller bearing with an adjustable outer ring. Background Art

[0002] Needle roller bearings are a specially designed type of roller bearing characterized by slender cylindrical rollers with relatively small diameters but large lengths (typically several to ten times their diameter). These slender rollers allow for a very compact radial structure, saving space and making them particularly suitable for applications where radial dimensions are limited but heavy loads must be carried.

[0003] Most existing ball bearings do not have a damping effect. However, in some situations, bearings need to have a certain damping effect. For example, at some robot joints, smooth starting and stopping are required to avoid joint swinging. Bearings need to have a certain damping effect. Traditional damping bearings take up too much space, resulting in excessive bulk at the joints. Therefore, a needle roller bearing with an adjustable outer ring is needed to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to provide a needle roller bearing with an adjustable outer ring, which has the advantages of small installation hole space and adjustable damping, and solves the problem that the existing needle roller bearings have no damping or the damping is not adjustable.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an outer ring adjustable needle roller bearing, comprising an inner ring, needle rollers and an outer ring, wherein the inner end surface of the outer ring is provided with an adjustable damping mechanism;

[0006] The adjustable damping mechanism includes a damping airbag and a pressure-regulating piston. The inner end face of the outer ring is provided with an annular groove, and the side of the annular groove is provided with a pressure-regulating chamber. The pressure-regulating piston is inserted into the pressure-regulating chamber and is slidingly sealed with the outer ring. The damping airbag is fixedly installed in the annular groove, and the side of the damping airbag is provided with an air inlet, which is through-connected to the bottom of the pressure-regulating chamber.

[0007] As a preferred embodiment of the outer ring adjustable needle roller bearing of the present invention, the damping airbag is a circular hollow rubber ring.

[0008] As a preferred outer ring adjustable needle roller bearing of the present invention, the upper end face of the pressure regulating piston is provided with a rotatably connected internal hexagonal screw, and the pressure regulating chamber is provided with an interference-connected internal threaded sleeve, and the internal hexagonal screw passes through the internal threaded sleeve and is threadedly connected to it.

[0009] As a preferred embodiment of the outer ring adjustable needle roller bearing of the present invention, the side wall of the damping airbag close to the needle roller end is thickened.

[0010] As a preferred outer ring adjustable needle roller bearing of the present invention, an oil filling hole is provided on the upper end surface of the outer ring away from the pressure regulating cavity end, and an oil distribution hole is provided on the side wall of the oil filling hole.

[0011] As a preferred embodiment of the outer ring adjustable needle roller bearing of the present invention, a dust cover with an interference fit is provided on the top of the oil filling hole.

[0012] As a preferred embodiment of the outer ring adjustable needle roller bearing of the present invention, the side surface of the annular dark groove is an arc surface structure, and the shape of the damping airbag is the same as that of the annular dark groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The utility model provides an adjustable damping mechanism on the inner end face of the outer ring, so that the needle roller bearing retains the advantages of saving space and carrying a large load, and has the advantages of a damping bearing. The adjustable damping structure greatly improves the applicable range of the bearing.

[0015] 2. The utility model provides an oil filling hole on the upper end face of the outer ring, which makes it convenient to add oil to the bearing when in use, and provides oil distribution holes on the side of the oil filling hole to improve the uniformity of oil filling, thereby increasing the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is an exploded view of the utility model;

[0018] Figure 3 It is a front cross-sectional view of the utility model;

[0019] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle.

[0020] In the figure: 1. Inner ring; 2. Outer ring; 201. Pressure regulating chamber; 202. Oil filling hole; 203. Oil distribution hole; 204. Annular groove; 205. Dust cover; 3. Needle roller; 4. Adjustable damping mechanism; 410. Damping airbag; 411. Air inlet; 420. Piston; 421. Hexagonal screw; 430. Internal threaded sleeve. DETAILED DESCRIPTION

[0021] See also Figures 1-4 , an outer ring adjustable needle roller bearing, comprising an inner ring 1, a needle roller 3 and an outer ring 2, wherein the inner end surface of the outer ring 2 is provided with an adjustable damping mechanism 4;

[0022] The adjustable damping mechanism 4 includes a damping airbag 410 and a pressure-regulating piston 420. The inner end face of the outer ring 2 is provided with an annular groove 204, and the side of the annular groove 204 is provided with a pressure-regulating chamber 201. The pressure-regulating piston 420 is inserted into the pressure-regulating chamber 201 and is slidingly sealed with the outer ring 2. The damping airbag 410 is fixedly installed in the annular groove 204. The side of the damping airbag 410 is provided with an air inlet 411, and the air inlet 411 is through-connected to the bottom of the pressure-regulating chamber 201.

[0023] When the bearing is in use, the hexagonal screw 421 is rotated by the hexagonal wrench, so that the hexagonal screw 421 and the internal threaded sleeve 430 cooperate to drive the pressure-regulating piston 420 to move, thereby pressing the air in the pressure-regulating chamber 201 into the damping airbag 410, changing the pressure of the damping airbag 410 on the needle roller 3, and thus adjusting the bearing damping. When the bearing is short of oil, lubricating oil is injected from the oil filling hole 202, and the lubricating oil is applied to the needle roller 3 through the oil distribution hole 203, thereby reducing the wear of the bearing.

[0024] Furthermore, the damping airbag 410 is a hollow rubber ring in the shape of a circular ring.

[0025] The pressure regulating piston 420 squeezes the air in the pressure regulating chamber 201 to expand the damping airbag 410, thereby squeezing the needle roller 3, increasing the friction resistance of the needle roller 3, and forming a damping effect.

[0026] Furthermore, a rotatably connected internal hexagonal screw 421 is provided on the upper end surface of the pressure regulating piston 420 , and an interference-connected internal threaded sleeve 430 is provided in the pressure regulating chamber 201 , and the internal hexagonal screw 421 passes through the internal threaded sleeve 430 and is threadedly connected thereto.

[0027] By rotating the hexagonal screw 421 , the position of the piston 420 is adjusted to adjust the pressure of the damping airbag 410 on the needle roller 3 , thereby achieving the effect of adjusting the damping.

[0028] Furthermore, the side wall of the damping airbag 410 close to the end of the needle roller 3 is thickened.

[0029] The end of the damping airbag 410 away from the needle roller 3 is deformed and expanded first, so as to avoid the wear and rupture of the damping airbag 410 close to the needle roller 3 after expansion and thinning, thereby improving the wear resistance of the damping airbag 410.

[0030] Furthermore, an oil filling hole 202 is provided on the upper end surface of the outer ring 2 away from the pressure regulating chamber 201 , and an oil distribution hole 203 is provided on the side wall of the oil filling hole 202 .

[0031] By injecting oil into the oil filling hole 202, the lubricating oil passes through the oil distribution hole 203 and is impregnated on the needle roller 3, making it convenient to replenish the oil to the bearing.

[0032] Furthermore, a dust cover 205 with an interference fit is provided on the top of the oil filling hole 202 .

[0033] The dust cover 205 shields the oil filling hole 202 to prevent dust in the oil filling hole 202 from entering the bearing along with the lubricating oil and wearing the bearing.

[0034] Furthermore, the side surface of the annular dark groove 204 is a curved surface structure, and the shape of the damping airbag 410 is the same as that of the annular dark groove 204 .

[0035] The arc-shaped mechanism does not have too many sharp corners, thereby preventing the damping airbag 410 from being crushed by the needle roller 3 and the outer ring 2.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A needle roller bearing with an adjustable outer ring, comprising an inner ring (1), needle rollers (3) and an outer ring (2), characterized in that: The inner end surface of the outer ring (2) is provided with an adjustable damping mechanism (4); The adjustable damping mechanism (4) comprises a damping airbag (410) and a pressure regulating piston (420); an annular groove (204) is provided on the inner end surface of the outer ring (2); a pressure regulating chamber (201) is provided on the side of the annular groove (204); the pressure regulating piston (420) is inserted into the pressure regulating chamber (201) and is slidably sealedly connected to the outer ring (2); the damping airbag (410) is fixedly installed in the annular groove (204); an air inlet (411) is provided on the side of the damping airbag (410); and the air inlet (411) is connected to the bottom of the pressure regulating chamber (201).

2. The outer ring adjustable needle roller bearing according to claim 1, characterized in that: The damping airbag (410) is a hollow rubber ring in the shape of a circular ring.

3. The outer ring adjustable needle roller bearing according to claim 2, characterized in that: The upper end surface of the pressure regulating piston (420) is provided with a rotatably connected internal hexagonal screw (421), and the pressure regulating chamber (201) is provided with an interference-connected internal threaded sleeve (430), and the internal hexagonal screw (421) passes through the internal threaded sleeve (430) and is threadedly connected thereto.

4. The outer ring adjustable needle roller bearing according to claim 3, characterized in that: The side wall of the damping airbag (410) close to the end of the needle roller (3) is thickened.

5. The outer ring adjustable needle roller bearing according to claim 1, characterized in that: An oil filling hole (202) is provided on the upper end surface of the outer ring (2) away from the pressure regulating cavity (201), and an oil distribution hole (203) is provided on the side wall of the oil filling hole (202).

6. The outer ring adjustable needle roller bearing according to claim 5, characterized in that: A dust cover (205) with interference fit is provided on the top of the oil filling hole (202).

7. The outer ring adjustable needle roller bearing according to claim 1, characterized in that: The side surface of the annular dark groove (204) is a curved surface structure, and the shape of the damping air bag (410) is similar to that of the annular dark groove (204). same.

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