A bearing with floating block

Abstract

The present invention discloses a bearing with a floating block, comprising a shell, an inner ring, a force-applying device and a force-applying base. The shell is composed of a fixed block and a floating block, which are combined to form an inner hole. Three grooves are arranged on the inner hole wall. The parting surface between the fixed block and the floating block is arranged in two of the grooves respectively. The force-applying seat is relatively fixed to the fixed block. There is a force-applying device between the force-applying seat and the floating block, which presses the floating block toward the fixed block so that the floating block, the inner ring and the fixed block fit together. The three grooves are used to form the outer circle of the inner ring and the inner hole of the shell, which fit together to form three parts. The present invention integrates the bearing, the fixed block and the floating block into one body, and forms a non-contact area in the recessed area and a contact area on both sides by setting a recessed area on the fixed block. In combination with the radial force-applying device, the vibration of the rotating shaft can be effectively eliminated, and the gap between the roller and the rotating shaft and the fixed block can be eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a bearing with a floating block. Background Art

[0002] Bearing supports are often used for shaft supports. There are sliding bearings and rolling bearings in hard support bearings. Due to thermal expansion and contraction, there must be a gap between the rotating body and the supporting body of sliding bearings and rolling bearings. This gap becomes the natural space for the shaft to vibrate when it rotates. In the field of machine tools and instruments, there are a large number of shaft vibration problems that plague designers and users.

[0003] In order to solve the above problems, many spindle structures are disclosed in the prior art, that is, a magnetic method is used to eliminate the clearance on one side of the bearing to make the shaft rotate smoothly, such as the patent publication number CN216742454U, the patent name is a self-adjustable electric spindle shaft structure, and the patent publication number CN114110019A discloses a self-adjustable electric spindle shaft mechanism and an electric spindle. The above technology eliminates the clearance by using a magnetic absorber.

[0004] However, the technologies disclosed in these patents only solve the vibration problem in one direction of the radial force direction. The vibration in the direction perpendicular to the radial force direction cannot be eliminated, and the actual use effect is limited. Summary of the invention

[0005] The technical problem to be solved by the present invention is a bearing with a floating block, which integrates the bearing with a fixed block and a floating block, and forms a force-free zone in the recessed area by setting three recessed areas on the fixed block and the floating block, and cooperates with a radial force application device to effectively solve many technical problems existing in the prior art.

[0006] The present invention is achieved through the following technical solutions: a bearing with a floating block, including an outer shell, an inner ring, a force-applying device and a force-applying base. The outer shell is composed of a fixed block and a floating block, which are combined to form an inner hole. Three grooves are provided on the wall of the inner hole. The parting surfaces between the fixed block and the floating block are respectively provided in two of the grooves. The force-applying seat is relatively fixed to the fixed block. There is a force-applying device between the force-applying seat and the floating block, which presses the floating block toward the fixed block so that the floating block, the inner ring and the fixed block fit together. The three grooves are used to form the outer circle of the inner ring and the inner hole of the outer shell, which fits into three parts.

[0007] As a preferred technical solution, there are several rollers between the outer shell and the inner ring. When the force applying device applies force, the outer shell and the inner ring composed of the floating block and the fixed block and the rollers between the two are pressed and fitted.

[0008] As a preferred technical solution, the center angle corresponding to the arc length of the groove is between 30 and 100 degrees, and the depth of the groove is greater than the maximum protrusion value obtained on the inner ring at any groove arc center angle.

[0009] As a preferred technical solution, the force applying device is a spring and / or a cylinder and / or an oil cylinder.

[0010] As a preferred technical solution, the inner hole of the housing and the outer circle of the inner ring are matched to form a cylinder or have a V-shaped cross-section.

[0011] As a preferred technical solution, the bearing is a cylindrical roller bearing.

[0012] As a preferred technical solution, the bearing is a spherical roller radial ball bearing.

[0013] As a preferred technical solution, the bearing is a four-point contact ball bearing.

[0014] As a preferred technical solution, there is a gap between the fixed block and the floating block, so that the outer shell and the inner ring can remain in close contact after the outer shell and the inner ring are worn.

[0015] As a preferred technical solution, the inner ring is a solid shaft structure.

[0016] The beneficial effects of the present invention are as follows: the present invention divides the bearing housing into a fixed block and a floating block, and by setting three grooves on the fixed block and the floating block, a non-contact area is formed in the groove area, and the inner ring is supported at three points in conjunction with the radial force application device, which can effectively eliminate the vibration of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the assembly of the bearing and the rotating shaft of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the bearing of the present invention installed on the fixed block and the floating block;

[0020] Figure 3 This is a schematic diagram of the structure of the present invention equipped with an elastic force applying device;

[0021] Figure 4 is a plan view schematic diagram of the bearing of the present invention;

[0022] Figure 5A simplified schematic diagram of a cylindrical roller bearing of the present invention;

[0023] Figure 6 A simplified schematic diagram of a spherical roller radial ball bearing of the present invention;

[0024] Figure 7 A simplified schematic diagram of a four-point contact ball bearing of the present invention;

[0025] Figure 8 A schematic diagram of the structure of another bearing of the present invention;

[0026] Fig. 9 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0027] Fig.10 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0028] Fig.11 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0029] Description of reference numerals:

[0030] 1. Floating block; 2. Fixed block; 3. Bearing; 4. Rotating shaft; 5. Locating pin; 6. Mounting base; 7. Bracket; 8. Elastic pressure plate; 9. Groove; 32. Inner ring; 33. Outer ring raceway; 34. Roller; 35. Inner ring raceway; 36. Spring; 37. Parting surface; 38. Force base; 100. Housing. DETAILED DESCRIPTION

[0031] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0032] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0033] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, in the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0035] Terms such as "upper", "above", "lower", and "below" used in the present invention to indicate spatial relative positions are for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative position may be intended to include different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, if the device in the figure is turned over, the units described as being "below" or "beneath" other units or features will be located "above" the other units or features. Therefore, the exemplary term "below" can encompass both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptive terms used herein interpreted accordingly.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "disposed", "socketed", "connected", "through", "plugged" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1-Figure 8 As shown, a bearing with a floating block of the present invention includes an outer shell 100, an inner ring 32, a force-applying device and a force-applying base 38. The outer shell 100 is composed of a fixed block 2 and a floating block 1, which are combined to form an inner hole. Three grooves 9 are provided on the wall of the inner hole. The parting surface 37 between the fixed block 2 and the floating block 1 is respectively provided in two of the grooves 9. The force-applying seat is relatively fixed to the fixed block 2. There is a force-applying device between the force-applying seat and the floating block 1, which presses the floating block 1 toward the fixed block 2 so that the floating block 1, the inner ring 32 and the fixed block 2 fit together. The three grooves 9 are used to form the outer circle of the inner ring 32 and the inner hole of the outer shell, which fits into three parts.

[0038] When in use, only one of the fixed block and floating block constituting the housing is fixed to the mounting base.

[0039] Figure 2 In the figure, a floating block 1 is arranged outside the bearing 3, and the floating block 1 is positioned relative to the fixed block 2 by a positioning pin 5, so that when the force-applying device applies force to the floating block 1, the floating block 1 can be pressed vertically relative to the fixed block 2 to prevent position displacement during the downward pressure.

[0040] like Figure 3 As shown, a mounting base 6 is provided at the bottom of the fixed block 2, and the mounting base 6 and the fixed block 2 are fixed by a positioning pin 5. A force-applying device is provided on the mounting base 6, and the force-applying device presses against the floating block 1. The force-applying device in this embodiment adopts an elastic force-applying device, that is, a bracket 7 is provided on the upper end of the mounting base 6 away from the fixed block 2, and an elastic pressure plate 8 is installed on the bracket 7. The elastic pressure plate 8 extends toward the upper end of the floating block 1, and the upper end surface of the floating block 1 is pressed down by the elastic pressure plate 8. The bracket 7 can also be provided with two, which can be separately arranged on both sides of the fixed block 2, and the floating block 1 is forced to apply force to the floating block 1 by using two elastic pressure plates 8 to jointly press down the floating block 1.

[0041] In some other embodiments, such as Fig. 9 As shown, the elastic pressure plate 8 can be replaced by a spring 36, and the fixed block 2 is set as a wrapped structure, while the floating block 1 is still located at the top position of each roller 34. The spring 36 is set between the fixed block 2 and the floating block 1, and pressure is applied to the floating block 1 through the spring 36, thereby achieving the purpose of applying force to the floating block 1, and playing the role of a force-applying device.

[0042] The spring 36 and the elastic pressure plate 8 used in the above structure both apply force to the floating block 1 by applying force from the top, the purpose of which is to generate a radial force applying device at the top of the floating block 1 to press the floating block 1 toward the fixed seat to eliminate the gap. The number of springs 36 used can be two, three, or even more. The spring 36 can also be replaced by a cylinder, an oil cylinder, or other structures with a force applying function. The number of springs 36 is not specifically limited here.

[0043] When the force-applying device presses toward the floating block 1, the floating block 1 is pressed toward the fixed block 2 and completes self-centering during the pressing process.

[0044] In the present invention, the bearing 3 is a roller 34 ball bearing 3. Of course, in other embodiments, the bearing 3 may also be a cylindrical roller 34 bearing 3, a spherical roller 34 radial ball bearing 3 or a four-point contact ball bearing 3, etc. Figure 5-7 As shown, the structure of the present invention can also be used in the above-mentioned bearing 3.

[0045] like Figure 1 As shown, the bearing 3 includes an inner ring 32 and rollers 34. It should be noted that the inner side surface of the inner ring 32 forms an inner ring 32 raceway, and an outer ring raceway 33 is formed on the inner ring 32 of the fixed block 2. The rollers 34 are arranged between the inner ring 32 raceway and the outer ring raceway 33. The rotating shaft 4 passes through the inner ring 32 of the bearing 3 and is fixed.

[0046] like Figure 4As shown, there is a groove 9 in the middle of the raceway of the fixed block 2, and the arc length of the groove 9 corresponds to a central angle of 30-120 degrees. The depth of the groove 9 is greater than the maximum protrusion value obtained by the contact part of the shaft 4 and the bearing 3 at any arc center angle of the groove 9.

[0047] The present invention utilizes the structure of the floating block 1 and the fixed block 2 combined with the bearing 3, so that there is a radial floating force between the floating block 1 and the fixed block 2, and a groove 9 is set on the outer ring raceway 33. When the floating block 1 is subjected to the pressure of the radial force-applying device, a contact area is formed on both sides of the groove 9, which can effectively eliminate the vibration of the rotating shaft 4 and eliminate the gap between the roller 34 and the rotating shaft 4 and the fixed block 2.

[0048] Example 1

[0049] like Figure 8 and Fig. 9 As shown, the inner hole formed by the combination of the fixed block 2 and the floating block 1 has three grooves 9, with a gap 37 between the two. A force base 38 is fixedly installed on the fixed block 2. A spring 36 is provided between the force base 38 and the floating block 1 to press the floating block 1 toward the fixed block 2. Due to the three grooves 9, the roller 34 between the floating block 1, the fixed block 2 and the inner ring 32 only contacts in the non-groove area, and three contact areas are naturally formed. The inner ring 32 and the rotating shaft 4 installed therein always have three parts supported, and no vibration is generated. When the outer diameter of the inner ring and the diameter of the roller increase due to thermal expansion, the floating block always maintains contact with the three supporting parts of the inner ring because it has floating space and is under the pressure of the spring 36.

[0050] Example 2

[0051] There are two differences from Example 1: one is that there is no rolling element, and the other is the shape of the cross section, such as Fig.10 As shown, Fig.10 There is no roller in the middle of the sliding bearing. The outer shell 100 is composed of a floating block 1 and a fixed block 2. The inner hole section is a V-shaped groove. There is also a V-shaped protrusion on the outer circle of the inner ring 32 that fits with the inner hole section of the part 100. When the spring 36 presses the floating block 1 to the fixed block 2, the outer shell formed by the combination of the two restricts the inner ring 32 in both radial and axial directions, and has three fitting parts, so that the inner ring 32 and the rotating shaft installed therein can eliminate vibration.

[0052] Example 3

[0053] The difference from Embodiments 1 and 2 is the inner ring 32. In this embodiment, the inner ring 32 is a solid shaft structure. Fig.11 As shown, one end of the rotating shaft 4 is a cylinder, and the other end is a rotating shaft with a V-shaped protrusion that can be limited in both axial and radial directions. Two housings 100 that are compatible with the rotating shaft are respectively installed at both ends of the rotating shaft 4.

[0054] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A bearing with a floating block, characterized in that: The invention comprises an outer shell (100), an inner ring (32), a force applying device and a force applying base. The outer shell (100) is composed of a fixed block (2) and a floating block (1). The two are combined to form an inner hole. Three grooves (9) are arranged on the wall of the inner hole. The parting surface (37) between the fixed block (2) and the floating block (1) is respectively arranged in two of the grooves (9). The force applying seat and the fixed block (2) are relatively fixed. There is a force applying device between the force applying seat and the floating block (1). The floating block (1) is pressed toward the fixed block (2) so that the floating block (1), the inner ring (32) and the fixed block (2) are fitted together. The three grooves (9) are used to form a fitting part between the outer circle of the inner ring (32) and the inner hole of the outer shell, which is divided into three sections. The central angle corresponding to the arc length of the groove (9) is between 30 and 100 degrees, and the depth of the groove (9) is greater than the maximum protrusion value obtained on the inner ring at any arc center angle of the groove (9); A plurality of rollers (34) are arranged between the outer shell and the inner ring (32). When the force applying device applies force, the outer shell and the inner ring (32) formed by the floating block (1) and the fixed block (2) and the rollers (34) between the two are pressed and fitted together. There is a gap between the fixed block (2) and the floating block (1), so that the outer shell and the inner ring (32) can remain in close contact after the outer shell and the inner ring (32) are worn.

2. The bearing with floating block according to claim 1, characterized in that: The force applying device is a spring (36) and / or an air cylinder and / or an oil cylinder / or an elastic pressure plate.

3. The bearing with floating block according to claim 1, characterized in that: The inner hole of the housing and the outer circle of the inner ring are matched to form a cylinder or a V-shaped cross section.

4. The bearing with floating block according to claim 1, characterized in that: The bearing (3) is a cylindrical roller bearing.

5. The bearing with floating block according to claim 1, characterized in that: The bearing (3) is a spherical roller radial ball bearing.

6. The bearing with floating block according to claim 1, characterized in that: The bearing (3) is a four-point contact ball bearing.

7. The bearing with floating block according to claim 1, characterized in that: The inner ring is a solid shaft structure.

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