Double-swing thrust floating knuckle bearing

Abstract

The utility model discloses a double-swing thrust floating knuckle bearing which comprises a shaft seat and a shaft core, a shaft seat concave spherical surface part is formed on the upper side of the shaft seat, a shaft seat convex spherical surface part is formed on the lower side of the shaft seat, and the ball center of the shaft seat concave spherical surface part is consistent with that of the shaft seat convex spherical surface part; the shaft core vertically penetrates through the shaft seat, a shaft core convex spherical surface part and a shaft core concave spherical surface part are formed on the shaft core, the shaft core convex spherical surface part and the shaft seat concave spherical surface part are consistent in spherical radius and spherical center and are slidably attached to the shaft seat concave spherical surface part, and the shaft core concave spherical surface part and the shaft seat convex spherical surface part are consistent in spherical radius and spherical center and are slidably attached to the shaft seat convex spherical surface part; and the shaft core is spherically hinged on the shaft seat. The utility model provides an integral structure type knuckle bearing capable of bearing loads in multiple directions.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a double swing thrust floating joint bearing. Background Art

[0002] Separable bearings are composed of separable parts, which can be installed and removed separately during installation and maintenance; while integral structure bearings are bearings that combine the various parts of the bearing into a whole, which are inseparable, and are also called one-piece bearings.

[0003] Most traditional thrust spherical plain bearings are split bearings, which are mainly used to bear axial loads in a single direction. In some special fields, such as applications in equipment with high uncertainty in load direction or heavy loads, traditional split thrust spherical plain bearings will no longer be applicable. Currently, there is a need for an integral structural spherical plain bearing that can withstand multi-directional loads. Utility Model Content

[0004] The utility model aims to provide a double-swing thrust floating spherical bearing, and solves the technical problem of how to provide a spherical bearing with an integral structure capable of bearing multi-directional loads.

[0005] To achieve the above-mentioned purpose, the solution of the utility model is: a double swing thrust floating joint bearing, including a shaft seat and a shaft core;

[0006] A concave spherical portion is formed on the upper side of the shaft seat, a convex spherical portion is formed on the lower side of the shaft seat, and the spherical centers of the concave spherical portion and the convex spherical portion are consistent;

[0007] The shaft core passes through the shaft seat up and down, and a convex spherical portion and a concave spherical portion are formed on the shaft core. The convex spherical portion of the shaft core is consistent with the spherical radius and spherical center of the concave spherical portion of the shaft seat, and slides on the concave spherical portion of the shaft seat. The concave spherical portion of the shaft core is consistent with the spherical radius and spherical center of the convex spherical portion of the shaft seat, and slides on the convex spherical portion of the shaft seat, so that the shaft core ball is hinged on the shaft seat.

[0008] Furthermore, the shaft core includes a first shaft core component and a second shaft core component, the first shaft core component is located on the upper side of the shaft seat, the convex spherical portion of the shaft core is formed on the first shaft core component, the second shaft core component is located on the lower side of the shaft seat, the concave spherical portion of the shaft core is formed on the second shaft core component, and the upper side of the second shaft core component is installed and fixed to the first shaft core component.

[0009] Furthermore, a first internal threaded hole is formed on the lower side of the first shaft core member, and a first external threaded portion is formed on the upper side of the second shaft core member. The first external threaded portion is screwed into the first internal threaded hole to install and fix the upper side of the second shaft core member and the lower side of the first shaft core member.

[0010] Furthermore, a second internal threaded hole is formed on the first shaft core member, and the second internal threaded hole passes downward from the upper side of the first shaft core member to the top of the first internal threaded hole. An insertion hole is formed at the top of the first external threaded portion. A threaded pin is threaded into the second internal threaded hole, and the bottom end of the threaded pin is inserted downward into the insertion hole to expand the insertion hole outward.

[0011] Furthermore, a tapered portion is formed at the bottom end of the threaded pin, and the tapered portion of the threaded pin is inserted into the insertion hole to expand the insertion hole outward.

[0012] Furthermore, a chamfer is formed on the top end of the insertion hole so as to form a surface contact with the tapered portion through the chamfer.

[0013] Furthermore, a first self-lubricating pad is provided on the surface of the concave spherical portion of the shaft seat.

[0014] Furthermore, a second self-lubricating pad is provided on the surface of the convex spherical portion of the shaft seat.

[0015] Furthermore, an end cover is installed on the bottom side of the shaft seat, and after the end cover is installed, the part of the shaft core located below the shaft seat is covered therein.

[0016] After adopting the above scheme, the beneficial effects of the utility model are:

[0017] (1) The shaft core can bear downward and downwardly inclined loads through the cooperation of the shaft seat concave spherical portion on the shaft seat and the shaft core convex spherical portion on the shaft core, and the shaft core can bear upward and upwardly inclined loads through the cooperation of the shaft seat convex spherical portion on the shaft seat and the shaft core concave spherical portion on the shaft core, so that the shaft core and the shaft seat will not be separated, forming an integrated structure. Unlike traditional separated thrust spherical bearings, they can no longer only bear loads in a single direction, and are more suitable for use in equipment with high uncertainty in load direction;

[0018] (2) A larger contact area can be formed between the concave spherical surface of the shaft seat and the convex spherical surface of the shaft core, as well as between the convex spherical surface of the shaft seat and the concave spherical surface of the shaft core, which is more suitable for use on heavy-loaded equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the utility model;

[0020] Figure 2 This is an exploded view of the utility model from another perspective;

[0021] Figure 3 It is a cross-sectional view of the utility model;

[0022] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0023] Figure 5It is a cross-sectional view of the utility model when the shaft core rotates to another angle.

[0024] Explanation of numbers: 1-shaft seat, 2-shaft core, 3-concave spherical portion of shaft seat, 4-convex spherical portion of shaft seat, 5-convex spherical portion of shaft core, 6-concave spherical portion of shaft core, 7-first shaft core member, 8-second shaft core member, 9-first internal threaded hole, 10-first external threaded portion, 11-second internal threaded hole, 12-socket, 13-threaded pin, 14-tapered portion, 15-chamfer, 16-first self-lubricating gasket, 17-second self-lubricating gasket, 18-end cover, 19-solid filling, 20-perforation. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the use of terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the specific protection scope of the utility model.

[0027] A double swing thrust floating spherical bearing, such as Figure 1-5 As shown, it includes a shaft seat 1 and a shaft core 2; a shaft seat concave spherical portion 3 is formed on the upper side of the shaft seat 1, and a shaft seat convex spherical portion 4 is formed on the lower side of the shaft seat 1, and the shaft seat concave spherical portion 3 is consistent with the spherical center of the shaft seat convex spherical portion 4; the shaft core 2 passes through the shaft seat 1 from top to bottom, and a shaft core convex spherical portion 5 and a shaft core concave spherical portion 6 are formed on the shaft core 2, the shaft core convex spherical portion 5 is consistent with the spherical radius and spherical center of the shaft seat concave spherical portion 3, and is slidably fitted on the shaft seat concave spherical portion 3, the shaft core concave spherical portion 6 is consistent with the spherical radius and spherical center of the shaft seat convex spherical portion 4, and is slidably fitted on the shaft seat convex spherical portion 4, so that the shaft core 2 is spherically hinged on the shaft seat 1, and the shaft core 2 is realized Compared with the shaft seat 1, the universal swing of the shaft core 2 (combined with Figure 3 and Figure 5 As shown, the shaft core 2 is swung to different angles respectively). The shaft seat concave spherical portion 3, the shaft seat convex spherical portion 4, the shaft core convex spherical portion 5 and the shaft core concave spherical portion 6 described in this article are not limited to complete concave spherical surfaces or convex spherical surfaces. Specifically in this embodiment, the focus is on Figure 3As shown, the lower half of the concave spherical portion 3 of the shaft seat is solid filling 19 to increase the strength. A through hole 20 is formed by penetrating downward from the center of the solid filling 19. The through hole 20 penetrates downward to the center of the convex spherical portion 4 of the shaft seat. The through hole 20 is used for the shaft core 2 to pass through, and a gap is left between the shaft core 2 and the side wall of the through hole 20. Through the cooperation of the convex spherical portion 5 of the shaft core and the concave spherical portion 3 of the shaft seat, the shaft core 2 can withstand vertical or inclined downward loads. Through the cooperation of the concave spherical portion 6 of the shaft core and the convex spherical portion 4 of the shaft seat, the shaft core 2 can withstand vertical or inclined upward loads, thereby realizing the ability to withstand multi-directional loads. No matter what direction of load is borne, the shaft seat 1 and the shaft core 2 will not separate. It is no longer like a traditional separated thrust spherical bearing that can only withstand loads in a single direction. It is more suitable for use in equipment with high uncertainty in load direction.

[0028] To facilitate manufacturing and assembly, the shaft core 2 includes a first shaft core component 7 and a second shaft core component 8. The first shaft core component 7 is located on the upper side of the shaft seat 1, and the shaft core convex spherical portion 5 is formed on the first shaft core component 7. The second shaft core component 8 is located on the lower side of the shaft seat 1, and the shaft core concave spherical portion 6 is formed on the second shaft core component 8. The upper side of the second shaft core component 8 is installed and fixed to the first shaft core component 7.

[0029] More specifically, a first internal threaded hole 9 is formed on the lower side of the first shaft core member 7, and a first external threaded portion 10 is formed on the upper side of the second shaft core member 8. The first external threaded portion 10 is screwed into the first internal threaded hole 9 to install and fix the upper side of the second shaft core member 8 to the lower side of the first shaft core member 7.

[0030] In order to make the fixation more secure and ensure that the first shaft core member 7 and the second shaft core member 8 will not be easily loosened during use, a second internal threaded hole 11 is also formed on the first shaft core member 7, and the second internal threaded hole 11 passes downward from the upper side of the first shaft core member 7 to the top of the first internal threaded hole 9. A plug hole 12 is formed at the top of the first external threaded portion 10. A threaded pin 13 is threadedly connected in the second internal threaded hole 11. The bottom end of the threaded pin 13 is inserted downward into the plug hole 12 to expand the plug hole 12 outward. The shapes of the threaded pin 13 and the plug hole 12 are not specifically limited. , it can be any existing pin inserted into the hole, which can expand the shape of the hole. After the hole expands, the first external threaded portion 10 expands and presses against the side wall of the first internal threaded hole 9. More preferably, in this embodiment, the threaded pin 13 has a more specific shape as follows: a tapered portion 14 is formed at the bottom end of the threaded pin 13, and the tapered portion 14 of the threaded pin 13 is inserted into the insertion hole 12 to expand the insertion hole 12 outward. In order to improve the expansion effect, it is more preferred that a chamfer 15 is formed at the top end of the insertion hole 12 to form a surface contact between the chamfer 15 and the tapered portion 14.

[0031] A first self-lubricating pad 16 is arranged on the surface of the concave spherical portion 3 of the shaft seat, and a second self-lubricating pad 17 is arranged on the surface of the convex spherical portion 4 of the shaft seat. The first self-lubricating pad 16 and the second self-lubricating pad 17 are made of a material containing a solid lubricant or having a low friction coefficient and good wear resistance, so as to eliminate external lubrication and reduce maintenance requirements and lubrication costs.

[0032] In order to improve the stability during practical use, an end cover 18 is installed on the bottom side of the shaft seat 1. After the end cover 18 is installed, the part of the shaft core 2 located below the shaft seat 1 is covered therein to prevent it from being exposed to the outside.

[0033] The above description is only a preferred embodiment of the present utility model and is not a limitation on the design of the present case. Any equivalent changes made based on the key design of the present case shall fall within the protection scope of the present case.

Claims

1. A double swing thrust floating spherical bearing, characterized in that: It comprises an axle seat (1) and an axle core (2); A shaft seat concave spherical portion (3) is formed on the upper side of the shaft seat (1), and a shaft seat convex spherical portion (4) is formed on the lower side of the shaft seat (1), and the sphere centers of the shaft seat concave spherical portion (3) and the shaft seat convex spherical portion (4) are consistent; The shaft core (2) passes through the shaft seat (1) from top to bottom. A shaft core convex spherical portion (5) and a shaft core concave spherical portion (6) are formed on the shaft core (2). The shaft core convex spherical portion (5) has the same spherical radius and spherical center as the shaft seat concave spherical portion (3) and is slidably fitted on the shaft seat concave spherical portion (3). The shaft core concave spherical portion (6) has the same spherical radius and spherical center as the shaft seat convex spherical portion (4) and is slidably fitted on the shaft seat convex spherical portion (4), so that the shaft core (2) is spherically hinged on the shaft seat (1).

2. A double swing thrust floating spherical bearing as claimed in claim 1, characterized in that: The shaft core (2) comprises a first shaft core member (7) and a second shaft core member (8), wherein the first shaft core member (7) is located on the upper side of the shaft seat (1), the shaft core convex spherical portion (5) is formed on the first shaft core member (7), the second shaft core member (8) is located on the lower side of the shaft seat (1), the shaft core concave spherical portion (6) is formed on the second shaft core member (8), and the upper side of the second shaft core member (8) is mounted and fixed to the first shaft core member (7).

3. A double swing thrust floating spherical bearing as claimed in claim 2, characterized in that: A first internal threaded hole (9) is formed on the lower side of the first shaft core member (7), and a first external threaded portion (10) is formed on the upper side of the second shaft core member (8). The first external threaded portion (10) is screwed into the first internal threaded hole (9) to install and fix the upper side of the second shaft core member (8) to the lower side of the first shaft core member (7).

4. A double swing thrust floating spherical bearing as claimed in claim 3, characterized in that: A second internal threaded hole (11) is also formed on the first shaft core member (7), and the second internal threaded hole (11) extends downward from the upper side of the first shaft core member (7) to the top of the first internal threaded hole (9). An insertion hole (12) is formed at the top of the first external threaded portion (10). A threaded pin (13) is threadedly connected to the second internal threaded hole (11), and the bottom end of the threaded pin (13) is inserted downward into the insertion hole (12) to expand the insertion hole (12) outward.

5. A double swing thrust floating spherical bearing as claimed in claim 4, characterized in that: The bottom end of the threaded pin (13) forms a tapered portion (14), and the tapered portion (14) of the threaded pin (13) is inserted into the insertion hole (12) to expand the insertion hole (12) outwards.

6. A double swing thrust floating spherical bearing as claimed in claim 5, characterized in that: A chamfer (15) is formed at the top end of the insertion hole (12) so as to form surface contact with the tapered portion (14) through the chamfer (15).

7. A double swing thrust floating spherical bearing as claimed in claim 1, characterized in that: A first self-lubricating pad (16) is provided on the surface of the concave spherical portion (3) of the shaft seat.

8. A double swing thrust floating spherical bearing as claimed in claim 1, characterized in that: A second self-lubricating pad (17) is provided on the surface of the convex spherical portion (4) of the shaft seat.

9. A double swing thrust floating spherical bearing as claimed in claim 1, characterized in that: An end cover (18) is installed on the bottom side of the shaft seat (1). After the end cover (18) is installed, the part of the shaft core (2) located below the shaft seat (1) is covered therein.

Images