Rotating shaft supporting mechanism and high-precision coating roller

Abstract

The utility model belongs to the technical field of coating equipment, and particularly relates to a rotating shaft supporting mechanism and a high-precision coating roller, the rotating shaft supporting mechanism comprises an inner ring, an outer ring and steel balls, the outer ring is circumferentially arranged outside the inner ring, a sliding groove formed by splicing the inner ring and the outer ring is arranged between the inner ring and the outer ring, and the steel balls are arranged in the sliding groove. The inner wall, close to one side of the inner ring, of the sliding groove and the inner wall, close to one side of the outer ring, of the sliding groove obliquely abut against the two opposite ends of the steel balls correspondingly, and the inner ring and the outer ring are further sleeved with a supporting shell. The outer ring and the inner ring have certain moving capacity in the axial direction, along with the axial position change of the outer ring and the inner ring, the attaching degree of the inner wall of the sliding groove and the steel balls can be changed, so that the gap between the steel balls and the inner wall of the sliding groove is reduced, and the axis position is more stable when the coating roller rotates; therefore, the distance between the cambered surface of the coating roller and the material is ensured, and the gluing thickness meets the production requirement.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating equipment, and in particular relates to a rotating shaft supporting mechanism and a high-precision coating roller. Background Art

[0002] Bearings are fixed parts in machinery. When other parts move relative to each other on the shaft, they are used to maintain the center position of the shaft and control the movement. The main materials are carbon steel, bearing steel, stainless steel, plastic, ceramic, etc. Miniature bearings are suitable for various industrial equipment, small rotary motors and other high-speed and low-noise fields.

[0003] A bidirectional thrust angular contact ball bearing disclosed in patent CN220956433U comprises: an outer ring, a retaining frame for mounting steel balls is installed inside the outer ring, an inner ring is arranged inside the retaining frame, and the characteristic is that a middle ring is arranged on the waistline of the surface of the outer ring, and a heat dissipation fin is installed inside the middle ring, and a heat dissipation ring is arranged on the outer wall of the end face of the outer ring; the ball is installed in the ball groove on the surface of the retaining frame, and the interior of the ball groove is designed to be hollow. When friction between the ball and the retaining frame generates heat, heat can be dissipated through the hollow interlayer inside the ball groove, and the interlayer is connected with the through hole on the surface of the shaft ring, thereby avoiding heat accumulation inside the retaining frame, and lubricating oil is injected through the oil filling hole to maintain lubrication and avoid excessive friction to cause frictional heating. A heat dissipation ring made of copper material is arranged on the surface of the outer ring, and heat dissipation fins are arranged inside the middle ring to assist the surface of the outer ring in heat dissipation.

[0004] In the above scheme, although the heat dissipation problem of the bearing is solved, there must be a gap between the ball and the ball groove for assembly and movement. Therefore, the load will also shift due to this gap during operation, which will cause the roller axis position to change. Especially when the coating roller requires stable downward pressure accuracy during coating operation, it will greatly affect the thickness of the coating. Utility Model Content

[0005] The purpose of the utility model is to provide a shaft support mechanism and a high-precision coating roller that can solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The rotating shaft support mechanism includes an inner ring, an outer ring and steel balls. The outer ring is circumferentially arranged outside the inner ring. A slide groove formed by the inner ring and the outer ring is opened between the inner ring and the outer ring. A plurality of steel balls are arranged in the slide groove. The inner wall of the slide groove close to the inner ring and the inner wall of the slide groove close to the outer ring are respectively inclined and pressed against the opposite ends of the steel balls. A support shell is also provided outside the inner ring and the outer ring.

[0008] In the rotating shaft support mechanism, the sliding groove includes an inner ring groove wall and an outer ring groove wall, the inner ring groove wall is arranged on the outer arc surface of the inner ring, and the outer ring groove wall is arranged on the inner arc surface of the outer ring, and the inner ring groove wall and the outer ring groove wall are inclined in the radial direction and abut against the two ends of the steel ball.

[0009] In the shaft support mechanism, a limiting protrusion is provided on the inner ring groove wall near one axial end, and a limiting protrusion is provided on the outer ring groove wall near the other axial end, and the two limiting protrusions respectively abut against the opposite ends of the steel ball.

[0010] In the rotating shaft support mechanism, the limiting protrusion includes a pressure-bearing surface and a limiting surface. The pressure-bearing surface is arranged on one side of the protrusion and contacts the surface of the steel ball. The limiting surface is arranged on the top surface of the protrusion and the distance to the inner wall of the slide groove on the opposite side is less than the diameter of the steel ball.

[0011] In the rotating shaft support mechanism, an annular pressure surface is arranged on the end surface of the inner ring and the outer ring close to the limiting protrusion, and a limiting surface is arranged on the end surface opposite to the pressure surface, and the pressure surface and the limiting surface are against the inner wall of the support shell.

[0012] In the rotating shaft support mechanism, the support shell includes a circumferential support sleeve and two annular end covers, the circumferential support sleeve is arranged on the outer arc surface of the outer ring, and the annular end covers are arranged on the end surfaces of the inner ring and the outer ring.

[0013] In the rotating shaft support mechanism, the circumferential support sleeve is arranged on the outer arc surface of one of the outer rings, wherein one of the annular end covers contacts the pressure surface of the inner ring, and the other annular end cover contacts the pressure surface of the outer ring.

[0014] In the rotating shaft support mechanism, the circumferential support sleeve is arranged on the outer arc surface of two relatively assembled outer rings, and the two annular end covers are respectively in contact with the pressure surfaces of the outer rings or the inner rings of the two end surfaces.

[0015] In the rotating shaft supporting mechanism, a pressure protrusion is provided on the annular end cover, and the pressure protrusion abuts against the pressure surface.

[0016] The utility model also provides a high-precision coating roller, and the high-precision coating roller comprises the rotating shaft supporting mechanism.

[0017] The advantages of the utility model are:

[0018] The outer ring and the inner ring have a certain degree of mobility in the axial direction. As the axial position of the outer ring and the inner ring changes, the degree of fit between the inner wall of the slideway and the steel ball will also change, making the gap between the steel ball and the inner wall of the slideway smaller, making the axial position of the coating roller more stable when rotating, thereby ensuring the distance between the arc surface of the coating roller and the material so that the coating thickness meets the production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the rotating shaft support mechanism of the utility model.

[0020] Figure 2 It is a schematic diagram of the inner and outer ring structures of the utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the high-precision coating roller of the utility model.

[0022] In the figure, there are an inner ring 1, an outer ring 2, steel balls 3, a support shell 4, a circumferential support sleeve 41, an annular end cover 42, a limiting protrusion 5, a pressure-bearing surface 51, a limiting surface 52, a pressure-bearing surface 53, and a stop surface 54. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the utility model and the accompanying drawings to further describe the technical solution of the utility model, but the utility model is not limited to these embodiments.

[0024] Example 1

[0025] like Figure 1-Figure 2 As shown, the shaft support mechanism includes an inner ring 1, an outer ring 2 and steel balls 3. The outer ring 2 is circumferentially arranged outside the inner ring 1. A slide groove formed by the inner ring 1 and the outer ring 2 is opened between the inner ring 1 and the outer ring 2. A plurality of steel balls 3 are arranged in the slide groove. The inner wall of the slide groove close to the inner ring 1 and the inner wall of the slide groove close to the outer ring 2 are respectively inclined and pressed against the opposite ends of the steel balls 3. A support shell 4 is also provided outside the inner ring 1 and the outer ring 2.

[0026] That is, the outer ring 2 and the inner ring 1 of the rotating shaft support mechanism have a certain degree of mobility in the axial direction. As the axial positions of the outer ring 2 and the inner ring 1 change, the degree of fit between the inner wall of the slide groove and the steel ball 3 will also change, making the gap between the steel ball 3 and the inner wall of the slide groove smaller, making the axial position of the coating roller more stable during rotation, thereby ensuring the distance between the arc surface of the coating roller and the material so that the coating thickness meets the production requirements.

[0027] In this embodiment, the slide groove includes an inner ring groove wall and an outer ring groove wall. The inner ring groove wall is arranged on the outer arc surface of the inner ring 1, and the outer ring groove wall is arranged on the inner arc surface of the outer ring 2. The inner ring groove wall and the outer ring groove wall are inclined in the radial direction and abut against the two ends of the steel ball 3.

[0028] The inner ring groove wall and the outer ring groove wall form two opposing pressures, and the axial separation of the two tilting forces fixes the steel ball 3 in the slide groove.

[0029] In this embodiment, a limiting protrusion 5 is provided on the inner ring groove wall near one axial end, and a limiting protrusion 5 is provided on the outer ring groove wall near the other axial end. The two limiting protrusions 5 are respectively against the opposite ends of the steel ball 3.

[0030] The inner ring 1 and the outer ring 2 are each provided with a limiting protrusion 5 on one side, and the two rings are assembled to form a complete slideway. When the inner ring 1 and the outer ring 2 move axially, the distance between the two limiting protrusions 5 changes, thereby adjusting the mobility of the steel ball 3 in the slideway.

[0031] Preferably, the limiting protrusion 5 includes a pressure-bearing surface 51 and a limiting surface 52. The pressure-bearing surface 51 is arranged on one side of the protrusion and contacts the surface of the steel ball 3. The limiting surface 52 is arranged on the top surface of the protrusion and the distance to the inner wall of the slide groove on the opposite side is less than the diameter of the steel ball 3.

[0032] The pressure-bearing surface 51 is an arc surface matching the steel ball 3 , and the steel ball 3 rolls in the combined sliding grooves of the inner and outer ring pressure-bearing surfaces 51 .

[0033] The limiting surface 52 is the convex surface of the limiting protrusion 5 , and the distance from the limiting surface 52 to the inner wall of the opposite side of the chute must be smaller than the diameter of the steel ball 3 to prevent the steel ball 3 from falling out of the chute.

[0034] In this embodiment, an annular pressure surface 53 is provided on the end surface of the inner ring 1 and the outer ring 2 close to the limiting protrusion 5, and a stop surface 54 is provided on the end surface opposite to the pressure surface 53. The pressure surface 53 and the stop surface 54 abut against the inner wall of the support shell 4.

[0035] There is a certain height difference between the pressure surface 53 and the axial end surface of the other ring. After being inserted into the support shell 4, the pressure surface 53 is squeezed by the shell to cause the inner and outer rings to move axially, thereby reducing the gap between the slide groove and the steel ball 3. The stop surface 54 will contact the shell on the other side after the axial movement of the ring body, preventing the ring body from further axial movement, and preventing the gap between the slide groove and the steel ball 3 from being too small to affect the normal movement of the steel ball 3.

[0036] Preferably, the support shell 4 includes a circumferential support sleeve 41 and two annular end covers 42 . The circumferential support sleeve 41 is arranged on the outer arc surface of the outer ring 2 , and the annular end covers 42 are arranged on the end surfaces of the inner ring 1 and the outer ring 2 .

[0037] In this embodiment, the circumferential support sleeve 41 is disposed on the outer arc surface of an outer ring 2 , wherein one annular end cover 42 contacts the pressure surface 53 of the inner ring 1 , and the other annular end cover 42 contacts the pressure surface 53 of the outer ring 2 .

[0038] The support shell 4 may include a set of inner ring 1 and outer ring 2 combinations, or an odd set of inner ring 1 and outer ring 2 combinations may be arranged therein.

[0039] Preferably, a pressure protrusion is provided on the annular end cover 42 , and the pressure protrusion abuts against the pressure surface 53 .

[0040] When the height difference between the limiting protrusion 5 and the axial surface is small, it is necessary to install an annular pressurizing protrusion on the inner side surface of the annular end cover 42 to make the inner ring 1 and the outer ring 2 produce sufficient displacement to reduce the slide groove.

[0041] Example 2

[0042] Based on the scheme of Example 1, the number of groups arranged in the support shell 4 is changed, and the circumferential support sleeve 41 is arranged on the outer arc surface of the two relatively assembled outer rings 2, and the two annular end covers 42 are respectively in contact with the pressure surfaces 53 of the outer ring 2 or the inner ring 1 at the two end surfaces.

[0043] The annular end covers 42 on both sides of the variable support shell 4 will also be squeezed by the pressure surface 53 of the outer ring 2 or the inner ring 1. The same pressure position can better maintain the shape stability of the support shell 4, so that the annular end covers 42 can apply force to the inner and outer rings more evenly.

[0044] Example 3

[0045] The shaft support mechanism in Example 1 is applied to a high-precision coating roller, and the two ends of the coating roller are respectively sleeved with the shaft support mechanism. The rotation accuracy of the coating roller can be adjusted by setting a pressurizing protrusion in the support shell 4 and the protrusion degree of the stop surface 54.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A shaft support mechanism, comprising an inner ring (1), an outer ring (2) and steel balls (3), wherein the outer ring (2) is circumferentially arranged outside the inner ring (1), a slide groove formed by the inner ring (1) and the outer ring (2) is provided between the inner ring (1) and the outer ring (2), and a plurality of the steel balls (3) are arranged in the slide groove, characterized in that: The inner wall of the slide groove close to the inner ring (1) and the inner wall of the slide groove close to the outer ring (2) are respectively inclined against the opposite ends of the steel ball (3), and a support shell (4) is also provided outside the inner ring (1) and the outer ring (2).

2. The shaft support mechanism according to claim 1, characterized in that: The slide groove comprises an inner ring groove wall and an outer ring groove wall, wherein the inner ring groove wall is arranged on the outer arc surface of the inner ring (1), and the outer ring groove wall is arranged on the inner arc surface of the outer ring (2), and the inner ring groove wall and the outer ring groove wall are inclined in the radial direction and abut against the two ends of the steel ball (3).

3. The shaft support mechanism according to claim 2, characterized in that: A limiting protrusion (5) is provided on the inner ring groove wall near one axial end, and a limiting protrusion (5) is provided on the outer ring groove wall near the other axial end. The two limiting protrusions (5) respectively abut against the opposite ends of the steel ball (3).

4. The shaft support mechanism according to claim 3, characterized in that: The limiting protrusion (5) comprises a pressure-bearing surface (51) and a limiting surface (52); the pressure-bearing surface (51) is arranged on one side of the protrusion and contacts the surface of the steel ball (3); the limiting surface (52) is arranged on the top surface of the protrusion and the distance to the inner wall of the slide groove on the opposite side is less than the diameter of the steel ball (3).

5. The shaft support mechanism according to claim 3, characterized in that: An annular pressure-bearing surface (53) is provided on the end surface of the inner ring (1) and the outer ring (2) on the side close to the limiting protrusion (5), and a stop surface (54) is provided on the end surface opposite to the pressure-bearing surface (53). The pressure-bearing surface (53) and the stop surface (54) are against the inner wall of the support shell (4).

6. The shaft support mechanism according to claim 5, characterized in that: The support shell (4) comprises a circumferential support sleeve (41) and two annular end covers (42); the circumferential support sleeve (41) is arranged on the outer arc surface of the outer ring (2); and the annular end covers (42) are arranged on the end surfaces of the inner ring (1) and the outer ring (2).

7. The shaft support mechanism according to claim 6, characterized in that: The circumferential support sleeve (41) is arranged on the outer arc surface of one of the outer rings (2), wherein one of the annular end covers (42) contacts the pressure surface (53) of the inner ring (1), and the other annular end cover (42) contacts the pressure surface (53) of the outer ring (2).

8. The shaft support mechanism according to claim 6, characterized in that: The circumferential support sleeve (41) is arranged on the outer arc surface of two oppositely assembled outer rings (2), and the two annular end covers (42) are respectively in contact with the pressure surfaces (53) of the outer ring (2) or the inner ring (1) at both end surfaces.

9. The shaft support mechanism according to claim 7 or 8, characterized in that: The annular end cover (42) is provided with a pressurizing protrusion, and the pressurizing protrusion abuts against the pressure-bearing surface (53).

10. High-precision coating roller, characterized in that: The high-precision coating roller includes the shaft supporting mechanism described in any one of claims 1-9.

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