Self-lubricating deep groove ball bearing and supporting chain wheel

Abstract

The invention belongs to the technical field of crawler-type engineering machinery, and particularly relates to a self-lubricating deep groove ball bearing and a supporting chain wheel. A raceway of the self-lubricating deep groove ball bearing is filled with a lubricating medium, sealing rings are arranged between an inner ring and an outer ring, and the sealing rings are arranged on the two sides of the raceway and seal the raceway; an outer ring of the self-lubricating deep groove ball bearing is in interference fit with the wheel body, an inner ring of the self-lubricating deep groove ball bearing is in interference fit with the wheel shaft, and an airtight sealing piece does not need to be arranged between the wheel body and the wheel shaft. A lubricating medium does not need to be injected from the outside to lubricate the bearing; an airtight sealing piece on the supporting chain wheel and a screw plug structure for filling lubricating oil are omitted, so that the cost of raw materials is reduced; and in the assembly process of the supporting chain wheel, an airtight sealing piece does not need to be assembled, airtightness detection or unscrewing of a screw plug on an end cover to inject lubricating oil into a wheel body and the like does not need to be carried out, and the assembly efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of crawler engineering machinery, in particular to a self-lubricating deep groove ball bearing and a supporting sprocket. Background Art

[0002] As an important part of the "four wheels and one belt" of crawler-type engineering machinery, the carrier sprocket supports the crawler upwards and keeps the crawler moving in a straight line. Common micro excavator carrier sprockets are mostly rolling bearing type, such as Figure 1 As shown, the sprocket wheel is composed of a wheel body 1, a wheel axle 4, a bearing 6, a retaining ring 5 (bearing locking member), a seal 7, a front cover 22, a rear cover 23 and a screw plug 8. One side of the sprocket wheel is sealed with the wheel body by the end cover, and the other side is sealed by the seal. The assembly process is: press the bearing, wear the shaft (assemble the wheel axle), install the retaining ring to lock the bearing, press one side to seal, install the other side end cover, test the air tightness, inject the lubricating medium, and finally tighten the screw plug. The assembly process of the sprocket wheel with this structure is complicated, and the interference press-fitting is prone to air leakage, and the production cost is high. At the same time, on the market side, oil leakage at the seal is also one of the most common market failure forms. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention provides a self-lubricating deep groove ball bearing and a carrier sprocket, which can improve the assembly efficiency of the carrier sprocket and simplify the assembly process of the carrier sprocket.

[0004] To achieve the above object, the technical solution provided by the present invention is as follows:

[0005] In the first aspect, the present application provides a self-lubricating deep groove ball bearing, comprising an inner ring, an outer ring and balls, a raceway for accommodating balls is arranged between the inner ring and the outer ring, the raceway is filled with a lubricating medium, a sealing ring is arranged between the inner ring and the outer ring, the sealing ring is arranged on both sides of the raceway and seals the raceway.

[0006] Optionally, a retaining frame is provided between the inner ring and the outer ring, and the retaining frame is provided in the raceway, and is used to limit the position of the balls.

[0007] Optionally, the lubricating medium is lubricating oil, lubricating grease or solid lubricant.

[0008] In a second aspect, the present application further provides a support sprocket, comprising the self-lubricating deep groove ball bearing described in the first aspect.

[0009] Optionally, it also includes a wheel body and a wheel axle, the outer ring of the self-lubricating deep groove ball bearing is interference fit with the wheel body, the inner ring of the self-lubricating deep groove ball bearing is interference fit with the wheel axle, and there is no need to set an airtight seal between the wheel body and the wheel axle.

[0010] Optionally, an end cover is also included, which includes a front end cover and a rear end cover. The front end cover is arranged between the wheel body and the axle outside the self-lubricating deep groove ball bearing, and the rear end cover is arranged on the wheel body. The end cover is used to protect the inside of the wheel body.

[0011] Optionally, a retaining ring is further included, which is arranged between the end of the wheel axle and the self-lubricating deep groove ball bearing and is used to limit the self-lubricating deep groove ball bearing.

[0012] Optionally, it is composed of a wheel body, a wheel axle, an end cover, a retaining ring and a self-lubricating deep groove ball bearing.

[0013] Compared with the prior art, this application has at least the following beneficial effects:

[0014] The self-lubricating deep groove ball bearing of the present invention has a self-lubricating effect and does not need to inject a lubricating medium from the outside to lubricate the bearing; the airtight seal on the support sprocket and the screw plug structure for filling lubricating oil are omitted, and the cost of raw materials is reduced; and the assembly process of the support sprocket does not require the assembly of an airtight seal, and there is no need to perform an airtight test or unscrew the screw plug on the end cover to fill lubricating oil into the wheel body, etc., which improves the assembly efficiency and greatly reduces the assembly time and the cost of the support sprocket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the supporting sprocket in the prior art;

[0017] Figure 2 This is a schematic structural diagram of a self-lubricating deep groove ball bearing in an embodiment of the present application;

[0018] Figure 3 This is a schematic structural diagram of a carrier sprocket in an embodiment of the present application;

[0019] Description of reference numerals:

[0020] 1. Wheel body; 21. Front end cover; 22. Rear end cover; 3. Self-lubricating deep groove ball bearing; 4. Wheel axle; 5. Retaining ring; 6. Bearing; 7. Seal; 8. Screw plug; 91. Inner ring; 92. Outer ring; 93. Ball; 94. Cage; 95. Sealing ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.

[0022] Example 1

[0023] like Figure 2 As shown, a self-lubricating deep groove ball bearing includes an inner ring 91, an outer ring 92, a ball 93 and a retainer 94. A groove is provided on the outer surface of the inner ring 91. A raceway for accommodating the ball 93 is formed between the inner ring 91 and the outer ring 92. The retainer 94 and the ball 93 are arranged in the raceway. The raceway is filled with a lubricating medium. A sealing ring 95 is provided between the inner ring 91 and the outer ring 92. The sealing ring 95 is provided on both sides of the raceway and seals the raceway. In this embodiment, the sealing ring 95 is made of nitrile rubber. The retainer 94 is used to limit the ball 93.

[0024] Through the above design of the present application, the lubricating medium of the self-lubricating deep groove ball bearing is integrated with the bearing, so that the bearing has a self-lubricating effect. The lubricating medium can be lubricating oil, lubricating grease or solid lubricant.

[0025] Example 2

[0026] like Figure 3 As shown, a carrier sprocket includes the self-lubricating deep groove ball bearing 3 in embodiment 1. It also includes a wheel body 1 and a wheel axle 4. The outer ring 92 of the self-lubricating deep groove ball bearing 3 is interference fit with the wheel body 1, and the inner ring 91 of the self-lubricating deep groove ball bearing 3 is interference fit with the wheel axle 4. There is no need to set an airtight seal 7 between the wheel body 1 and the wheel axle 4, and there is no need to set a screw plug 8 for filling lubricating oil on the end cover. The structure is simple, the assembly process is small, and the assembly efficiency is greatly improved.

[0027] Example 3

[0028] The difference between this embodiment and embodiment 2 is that it is composed of a wheel body 1, a wheel axle 4, an end cover, a retaining ring 5 and a self-lubricating deep groove ball bearing 3. The end cover includes a front end cover 21 and a rear end cover 22. The front end cover 21 is arranged between the wheel body 1 and the wheel axle 4 outside the self-lubricating deep groove ball bearing 3, and the rear end cover 22 is arranged on the wheel body 1. The front end cover 21 and the rear end cover 22 are interference fit with the wheel body. The end cover is used to protect the inside of the wheel body 1 to prevent impurities in the environment from entering the wheel body 1 to damage the bearing or affect the bearing life. The retaining ring 5 is arranged between the end of the wheel axle 4 and the self-lubricating deep groove ball bearing 3, and is used to limit the self-lubricating deep groove ball bearing 3 and limit the axial movement of the bearing.

[0029] The assembly process of the supporting sprocket in the present invention only requires: pressing the self-lubricating deep groove ball bearings 3 at both ends, assembling the wheel shaft 4, installing the retaining ring 5, and installing the end covers at both sides.

[0030] In the prior art, the end caps at both ends need to be sealed with the wheel body 1 through interference fit, and the press-fitting process has high requirements on the surface roughness of the parts. During the press-fitting process, the connection between the end caps and the wheel body is prone to be scratched, resulting in air leakage. In the present application, only the end caps and the wheel body 1 need to be press-fitted together, and there is no need to achieve sealing through interference fit. Even if scratches or air leakage occur, the machine can be used normally.

[0031] The present invention eliminates the airtight seal 7 on the carrier wheel and the screw plug 8 for filling lubricating oil, thereby reducing the cost of raw materials; and during the assembly process of the carrier wheel, there is no need to assemble the airtight seal 7, and there is no need to perform airtightness testing or unscrew the screw plug 8 on the end cover to fill lubricating oil into the wheel body 1, thereby improving the assembly efficiency and greatly reducing the assembly time and the cost of the carrier wheel.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0033] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A self-lubricating deep groove ball bearing, characterized in that: It includes an inner ring, an outer ring and balls. A raceway for accommodating balls is arranged between the inner ring and the outer ring. The raceway is filled with lubricating medium. A sealing ring is arranged between the inner ring and the outer ring. The sealing ring is arranged on both sides of the raceway and seals the raceway.

2. The self-lubricating deep groove ball bearing according to claim 1, characterized in that: A retaining frame is also arranged between the inner ring and the outer ring. The retaining frame is arranged in the raceway and is used to limit the position of the balls.

3. The self-lubricating deep groove ball bearing according to claim 1, characterized in that: The lubricating medium is lubricating oil, lubricating grease or solid lubricant.

4. A carrier sprocket, characterized in that: The invention comprises the self-lubricating deep groove ball bearing according to any one of claims 1 to 3.

5. The carrier sprocket according to claim 4, characterized in that: It also includes a wheel body and a wheel axle. The outer ring of the self-lubricating deep groove ball bearing is interference fit with the wheel body, and the inner ring of the self-lubricating deep groove ball bearing is interference fit with the wheel axle.

6. The carrier sprocket according to claim 5, characterized in that: It also includes an end cover, which includes a front end cover and a rear end cover. The front end cover is arranged between the wheel body and the wheel axle outside the self-lubricating deep groove ball bearing, and the rear end cover is arranged on the wheel body. The end cover is used to protect the inside of the wheel body.

7. The carrier sprocket according to claim 6, characterized in that: It also includes a retaining ring, which is arranged between the end of the wheel shaft and the self-lubricating deep groove ball bearing and is used to limit the self-lubricating deep groove ball bearing.

8. The carrier sprocket according to claim 7, characterized in that: It consists of a wheel body, a wheel axle, an end cover, a retaining ring and a self-lubricating deep groove ball bearing.

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