Swing type involute external tooth type turntable bearing

Abstract

The utility model belongs to the technical field of turntable bearings, and particularly relates to a swing type involute outer tooth type turntable bearing which comprises an outer ring, an inner ring, a steel ball and an outer tooth ring, the inner ring is arranged on the inner side of the outer ring, and the steel ball is arranged between the outer ring and the inner ring; the steel balls are mounted between the outer ring raceway and the inner ring raceway, an outer gear ring is arranged on the outer peripheral surface of the outer ring, a tooth-shaped part and an arc-shaped part are formed on the outer ring surface of the outer gear ring in a sectional manner, the tooth-shaped part and the arc-shaped part are connected to form the outer ring surface of the outer gear ring, and the central angle of the arc length where the tooth-shaped part is located is larger than the maximum swing angle of the bearing. According to the tooth-shaped structure, a sectional type machining method is adopted, partial tooth-shaped machining is carried out in the swing transmission area of the bearing, the transmission requirement of the swing type bearing can be met, and meanwhile the machining cost and the machining time are saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of turntable bearings, and in particular relates to a swing-type involute external-tooth turntable bearing. Background Art

[0002] The slewing bearing is a large bearing with a special structure that can bear large axial load, radial load, overturning moment and other comprehensive loads at the same time, and integrates multiple functions such as support, rotation, transmission, and fixation. It can meet the different needs of various main machines working under various working conditions. On the other hand, the slewing bearing itself has the characteristics of compact structure, convenient guiding rotation, simple installation and easy maintenance. It is widely used in engineering machinery, automation equipment and other fields. Usually, the bearing structure is divided into an inner ring with internal teeth or an outer ring with external teeth, and the toothed ring is used as the power input end. However, it is difficult to process the tooth structure on the bearing ring, and the processing cost is high. In addition, for some swing-rotating slewing bearings, some tooth structures cannot participate in the equipment transmission, wasting processing costs and processing time. Summary of the invention

[0003] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a swinging involute external gear turntable bearing to achieve the purpose of reducing costs and increasing efficiency and meet the working conditions requirements of the product.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a swinging involute external gear turntable bearing, comprising an outer ring, an inner ring, steel balls and an outer gear ring, the inner ring is arranged on the inner side of the outer ring, and a steel ball is arranged between the outer ring and the inner ring; the steel ball is installed between the outer ring raceway and the inner ring raceway, and an outer gear ring is arranged on the outer circumferential surface of the outer ring, and the outer ring surface of the outer gear ring is segmented to form a toothed portion and an arc-shaped portion, the toothed portion and the arc-shaped portion are connected to form the outer ring surface of the outer gear ring, and the central angle of the arc length where the toothed portion is located is greater than the maximum swing angle of the bearing.

[0005] Furthermore, the arc-shaped portion is connected to the bottom of the tooth groove of the tooth-shaped portion, the bearing is meshed and connected with the external mechanism through the outer gear ring, the tooth-shaped portion is meshed and connected with the tooth structure of the external mechanism, and the arc-shaped portion has no contact with the tooth structure of the external mechanism.

[0006] In a preferred solution, the number of the toothed portion is one.

[0007] In another preferred embodiment, there are two tooth-shaped portions, which are arranged 180° apart, the central angle of the arc length of each tooth-shaped portion is greater than the maximum swing angle of the bearing, and there is an arc portion between the two tooth-shaped portions.

[0008] In a preferred solution, the outer ring is integrally provided with the outer gear ring.

[0009] In another preferred embodiment, the outer gear ring is detachably connected to the outer circumferential surface of the outer ring by means of heat-fitting, and the inner circumferential surface of the outer gear ring is interference fit with the outer circumferential surface of the outer ring.

[0010] Furthermore, the inner ring and the outer ring are axially staggered, and the inner ring and the outer ring are sealed on both sides by two sealing rings. The outer diameter of the first sealing ring is assembled in the sealing groove on the inner surface of the outer ring, and the inner diameter sealing lip of the first sealing ring is interference fit with the end face of the inner ring; the inner diameter of the second sealing ring is assembled in the sealing groove on the outer surface of the inner ring, and the outer diameter sealing lip of the second sealing ring is interference fit with the end face of the outer ring.

[0011] Furthermore, a ball loading port for assembling steel balls is provided on the inner ring, and the ball loading port is blocked by a ball blocking block, and the ball blocking block is fixed to the inner ring by an axial conical pin.

[0012] Furthermore, an oil filling port is arranged on the end surface of the outer ring, and the oil filling port is connected to the outer ring raceway through the axial oil passage and the radial oil passage.

[0013] The beneficial effects of the utility model are as follows: the tooth profile structure of the utility model adopts a segmented processing method, and partial tooth profile processing is performed in the swing transmission area of ​​the bearing, which can meet the transmission requirements of the swing bearing and save processing costs and processing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the swing type involute external gear turntable bearing of the utility model;

[0015] Figure 2 It is a cross-sectional view of the swing type involute external gear turntable bearing of the utility model;

[0016] Figure 3 for Figure 2 A magnified cross-sectional view of the center turntable bearing;

[0017] In the figure: 1, outer ring, 2, inner ring, 3, steel ball, 4, outer gear ring, 5, toothed portion, 6, arc portion, 7, first sealing ring, 8, second sealing ring, 9, ball blocking block, 10, tapered pin, 11, oil filling port, 12, axial oil channel, 13, radial oil channel. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0019] See attached Figure 1-3 A swinging involute external gear turntable bearing comprises an outer ring 1, an inner ring 2, steel balls 3 and an outer gear ring 4. The inner ring 2 is arranged on the inner side of the outer ring 1, and a steel ball 3 is arranged between the outer ring 1 and the inner ring 2; the steel ball 3 is installed between the outer ring raceway and the inner ring raceway, and the steel ball 3 is fully assembled or separated by an isolation block. The outer peripheral surface of the outer ring is provided with an outer gear ring 4, and the outer ring surface of the outer gear ring 4 is segmentedly formed with a toothed portion 5 and an arc portion 6. The toothed portion 5 and the arc portion 6 continue to form the outer ring surface of the outer gear ring 4, and the central angle of the arc length where the toothed portion 5 is located is greater than the maximum swing angle of the bearing.

[0020] Based on the above technical solution, reducing the number of teeth in the circumferential direction saves machining costs and achieves the purpose of reducing costs and increasing efficiency; the structure of some teeth reduces the weight of the entire device, so that it meets the requirements of lightweight; the structural cross-sectional area of ​​some teeth is smaller, saving internal use space.

[0021] Furthermore, the arc-shaped portion 6 is connected to the bottom of the tooth groove of the tooth-shaped portion 5, the bearing is meshed with the external mechanism through the outer gear ring 4, the tooth-shaped portion 5 is meshed with the tooth structure of the external mechanism, and the arc-shaped portion 6 has no contact with the tooth structure of the external mechanism.

[0022] In one embodiment, the number of the toothed portion 5 is one.

[0023] In another embodiment, there are two tooth-shaped portions 5 , which are arranged 180° apart, the central angle of the arc length of each tooth-shaped portion 5 is greater than the maximum swing angle of the bearing, and an arc portion 6 is between the two tooth-shaped portions 5 .

[0024] For example, as shown in the drawings of this embodiment, the outer ring surface of the outer gear ring includes two tooth-shaped portions and two arc-shaped portions that are alternately arranged, and the central angle of each tooth-shaped portion and each arc-shaped portion is 90 degrees.

[0025] In order to ensure the strength and stability of the outer gear ring, in a preferred solution, the outer ring 1 and the outer gear ring 4 are integrally provided.

[0026] In order to save processing costs, in another preferred solution, the outer gear ring 4 is detachably connected to the outer circumference of the outer ring 1 by heat-fitting, and the inner circumference of the outer gear ring 4 is interference-fitted with the outer circumference of the outer ring 1. The detachable outer gear ring structure avoids the cumbersome processing mode of the integral bearing processing, and the detachable outer gear ring has low maintenance costs. After the gear ring is worn, it can be replaced separately to reduce costs; in order to improve the strength and processing accuracy of the tooth structure, the outer gear ring can be made of different materials from the bearing to achieve the purpose of reducing costs and increasing efficiency.

[0027] Furthermore, in order to ensure the sealing effect inside the bearing, the inner ring 2 and the outer ring 1 are axially staggered, and the inner ring 2 and the outer ring 1 are sealed on both sides by two sealing rings. The outer diameter of the first sealing ring 7 is assembled in the sealing groove on the inner surface of the outer ring 1, and the inner diameter sealing lip of the first sealing ring 7 is interference fit with the end face of the inner ring 2; the inner diameter of the second sealing ring 8 is assembled in the sealing groove on the outer surface of the inner ring 2, and the outer diameter sealing lip of the second sealing ring 7 is interference fit with the end face of the outer ring 1.

[0028] Furthermore, in order to facilitate the assembly of the steel ball 3 , a ball loading port for assembling the steel ball is provided on the inner ring 2 , and the ball loading port is blocked by a ball blocking block 9 , and the ball blocking block 9 is fixed to the inner ring by an axial conical pin 10 .

[0029] Furthermore, in order to ensure lubrication inside the bearing, an oil filling port 11 is provided on the end surface of the outer ring, and the oil filling port 11 is connected to the outer ring raceway through an axial oil passage 12 and a radial oil passage 13 .

[0030] It should be noted that the parts not described in detail in the present invention are prior art.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A swing type involute external gear turntable bearing, characterized in that: It includes an outer ring, an inner ring, steel balls and an outer gear ring. The inner ring is arranged on the inner side of the outer ring, and a steel ball is arranged between the outer ring and the inner ring; the steel ball is installed between the outer ring raceway and the inner ring raceway, and the outer peripheral surface of the outer ring is provided with an outer gear ring. The outer ring surface of the outer gear ring is segmented to form a toothed portion and an arc-shaped portion. The toothed portion and the arc-shaped portion are connected to form the outer ring surface of the outer gear ring, and the central angle of the arc length of the toothed portion is greater than the maximum swing angle of the bearing.

2. The swing type involute external gear turntable bearing according to claim 1, characterized in that: The arc-shaped portion is connected with the bottom of the tooth groove of the tooth-shaped portion, the bearing is meshed with the external mechanism through the outer gear ring, the tooth-shaped portion is meshed with the tooth structure of the external mechanism, and the arc-shaped portion has no contact with the tooth structure of the external mechanism.

3. The swing type involute external gear turntable bearing according to claim 1 or 2, characterized in that: The number of the toothed portion is one.

4. The swing type involute external gear turntable bearing according to claim 1 or 2, characterized in that: There are two tooth-shaped parts, which are arranged at an interval of 180 degrees. The central angle of the arc length of each tooth-shaped part is greater than the maximum swing angle of the bearing, and there is an arc part between the two tooth-shaped parts.

5. The swing type involute external gear turntable bearing according to claim 1 or 2, characterized in that: The outer ring is integrally arranged with the outer gear ring.

6. The swing type involute external gear turntable bearing according to claim 1 or 2, characterized in that: The outer gear ring is detachably connected to the outer circumferential surface of the outer ring by means of shrink fitting, and the inner circumferential surface of the outer gear ring is interference fit with the outer circumferential surface of the outer ring.

7. The swing type involute external gear turntable bearing according to claim 1, characterized in that: The inner ring and the outer ring are axially staggered, and the inner ring and the outer ring are sealed on both sides by two sealing rings. The outer diameter of the first sealing ring is assembled in the sealing groove on the inner surface of the outer ring, and the inner diameter sealing lip of the first sealing ring is interference fit with the end face of the inner ring; the inner diameter of the second sealing ring is assembled in the sealing groove on the outer surface of the inner ring, and the outer diameter sealing lip of the second sealing ring is interference fit with the end face of the outer ring.

8. The swing type involute external gear turntable bearing according to claim 1, characterized in that: The inner ring is provided with a ball loading port for assembling steel balls, and the ball loading port is blocked by a ball blocking block, and the ball blocking block is fixed on the inner ring by an axial conical pin.

9. The swing type involute external gear turntable bearing according to claim 1, characterized in that: The outer ring end surface is provided with an oil filling port, which is connected to the outer ring raceway through an axial oil passage and a radial oil passage.

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