Tapered roller bearings for power heads

Abstract

The present invention discloses a tapered roller bearing for a power head, which is composed of an outer ring body, an inner ring body, a retainer and a tapered roller body, wherein the generatrix of the tapered roller body contacts the raceway of the outer ring body and the raceway of the inner ring, and the tapered roller body is installed in the pocket of the retainer, and the retainer is used to provide support and positioning for the tapered roller body, and the sides of the outer ring body and the inner ring body are respectively provided with an outer ring protrusion and an inner ring protrusion, and the length of the outer ring protrusion is equal to the length of the inner ring protrusion, and the outer ring protrusion and the inner ring protrusion are arranged in mirror symmetry. The tapered roller bearing for a power head is provided with an outer ring protrusion and an inner ring protrusion, and the length of the outer ring protrusion is equal to the length of the inner ring protrusion, and the size has been set in the bearing processing process, so the pre-tightening of the assembled bearing can be realized without using an adjustment washer, and different bearings can be interchanged.

Description

Technical Field

[0001] The invention relates to the technical field of tapered roller bearings, in particular to a tapered roller bearing dedicated to a power head. Background Art

[0002] Tapered roller bearings are a type of bearing that can withstand radial loads. With the development of the machinery industry, the requirements for equipment accuracy and rigidity are gradually increasing, and the ease of installation and use of bearings, as well as the interchangeability of parts are also required accordingly. Conventional single-row tapered roller bearings have relatively misaligned inner and outer rings and large dimensional dispersion, which brings great inconvenience to assembly and precision adjustment, is not conducive to parts interchangeability, and have complex installation and assembly, and difficult to control installation clearance.

[0003] In view of the above problems, it is urgent to carry out innovative design based on the original tapered roller shaft. Summary of the invention

[0004] The purpose of the present invention is to provide a tapered roller bearing specially used for a power head, so as to solve the problems raised by the above-mentioned background technology that the inner and outer rings of conventional single-row tapered roller bearings on the market are relatively misaligned, the size dispersion is large, it brings great inconvenience to assembly and precision adjustment, is not conducive to the interchange of parts, the installation and assembly are complicated, and the installation clearance is difficult to control.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tapered roller bearing specially used for a power head, comprising an outer ring body, an inner ring body, a retaining frame and a tapered roller body, wherein the generatrix of the tapered roller body contacts the raceway of the outer ring body and the raceway of the inner ring, and the tapered roller body is installed in the pocket of the retaining frame, and the retaining frame is used to provide support and positioning for the tapered roller body, and the sides of the outer ring body and the inner ring body are respectively provided with an outer ring protrusion and an inner ring protrusion, and the length of the outer ring protrusion is equal to the length of the inner ring protrusion, and the outer ring protrusion and the inner ring protrusion are arranged in mirror symmetry, and the preload of the assembled bearing is achieved by the cooperation of the outer ring protrusion and the inner ring protrusion, and the positions of different bearings can be interchanged without affecting the installation preload force.

[0006] To further optimize the technical solution, an outer ring connecting groove is provided on the inner side of the outer ring body, and an inner ring connecting groove is provided on the outer side of the inner ring body. The outer ring connecting groove and the inner ring connecting groove constitute the raceways of the outer ring body and the inner ring body respectively. The tapered roller body is confined in the bearing by the inner ring connecting groove and the outer ring connecting groove so that it can maintain stable rotation subsequently.

[0007] To further optimize the technical solution, the tapered roller body is connected to the inner ring body and the outer ring body through the inner ring connecting groove and the outer ring connecting groove respectively, and the outer ring connecting groove, the inner ring connecting groove and the surface of the tapered roller body are arranged in parallel, thereby increasing the contact area between the tapered roller body and the outer ring connecting groove and the inner ring connecting groove, thereby improving its axial load capacity.

[0008] To further optimize the technical solution, a lubrication mechanism is provided inside the outer ring body to lubricate the tapered roller body in the outer ring connecting groove, thereby reducing the friction force it experiences during rotation.

[0009] To further optimize the technical solution, the lubrication mechanism includes an oil storage tank, an oil outlet, an extrusion plug and a position control unit;

[0010] An oil storage tank is arranged inside the outer ring body and is used for storing oil;

[0011] The oil outlet is provided on the inner side of the oil storage tank and is used to transfer the oil in the oil storage tank to the outer ring connecting groove;

[0012] The extrusion plug is slidably installed inside the oil storage tank and fits the inner wall of the oil storage tank. The oil is squeezed and discharged by moving inside the oil storage tank.

[0013] The position control unit is installed on the surface of the squeeze plug to control the position of the squeeze plug.

[0014] To further optimize the technical solution, the oil storage tank is designed with an arc-shaped structure, and the oil storage tank is set at equal angles inside the outer ring body, and the oil outlets are evenly distributed on the surface of the oil storage tank, thereby increasing the lubrication area of ​​the oil storage tank and the oil outlets, and improving the subsequent lubrication effect on the tapered roller body.

[0015] To further optimize the technical solution, the position control unit is composed of an adjustment rod and a rotating head;

[0016] The adjusting rod and the bearing are installed on the outside of the extrusion plug, and the adjusting rod and the outer ring body form a threaded connection, which can drive the extrusion plug to move when rotating;

[0017] The rotating head is fixed on the end of the adjusting rod to drive the adjusting rod to rotate, and a cross groove is provided on the surface of the rotating head for connecting with a screwdriver. The rotating head can be subsequently turned by a screwdriver to control the position of the extrusion plug in cooperation with the adjusting rod, thereby pushing the oil in the oil storage tank into the outer ring connecting groove to lubricate the tapered roller body.

[0018] To further optimize the technical solution, a gap filling mechanism is provided inside the inner ring body to increase the stability of the connection between the inner ring body and the connecting piece.

[0019] Further optimizing the technical solution, the gap filling mechanism includes a first airbag, a rubber pad, a connecting pipe, a second airbag, a pressing block and a positioning hole;

[0020] A first airbag is annularly arranged inside the inner ring body;

[0021] A rubber pad is arranged on the outer side of the first airbag to provide protection for it;

[0022] A connecting pipe, mounted on the surface of the first airbag for conveying gas;

[0023] The second airbag is connected to the first airbag through a connecting tube, and the elastic contraction force of the second airbag is smaller than the elastic contraction force of the first airbag. In a default state, the first airbag remains in a contracted state;

[0024] A pressing block, arranged outside the second airbag and used for pressing the second airbag;

[0025] The positioning hole is arranged above the pressure block and passes through the surface of the inner ring body. When the connecting piece is installed, it can be connected through the preset protrusion and the positioning hole on the connecting piece, which is convenient for positioning the connecting piece and allows the first airbag to expand to fill the connection gap.

[0026] Compared with the prior art, the beneficial effects of the present invention are: the special tapered roller bearing for the power head;

[0027] (1) The outer ring protrusion and the inner ring protrusion are set, and the length of the outer ring protrusion is equal to the length of the inner ring protrusion. This dimension has been set during the bearing processing process. Therefore, the preload of the assembled bearing can be achieved without using an adjusting washer, and the positions of different bearings can be interchanged without affecting the installation preload force. In the commonly used assembly method of single-row universal tapered roller bearings, the positions of single bearings in the group can be interchanged;

[0028] (2) A lubrication mechanism is provided, through which lubricating oil can be added to the surface of the tapered roller body inside the outer ring, thereby reducing the friction force on the tapered roller body during rotation and increasing the subsequent service life of the device;

[0029] (3) A gap filling mechanism is provided to fill the gap between the inner ring body and the connecting piece, thereby improving the stability of the connection between the connecting piece and the inner ring body and reducing the vibration generated during subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the inner ring protrusion and the outer ring protrusion of the present invention;

[0032] Figure 3 It is a schematic diagram of the commonly used assembly method of the single-row universal tapered roller bearing of the present invention;

[0033] Figure 4 This is a schematic diagram of the inner structure of the outer ring of the present invention;

[0034] Figure 5 This is a main cross-sectional schematic diagram of the connection between the inner ring and the components of the present invention;

[0035] Figure 6 It is a schematic diagram of the side structure of the inner ring of the present invention.

[0036] In the figure: 1. Outer ring body; 101. Outer ring connecting groove; 2. Inner ring body; 201. Inner ring connecting groove; 3. Cage; 4. Tapered roller body; 5. Outer ring protrusion; 6. Inner ring protrusion; 7. Oil storage tank; 8. Oil outlet; 9. Extrusion plug; 10. Adjustment rod; 11. Rotating head; 12. First airbag; 13. Rubber pad; 14. Connecting pipe; 15. Second airbag; 16. Pressure block; 17. Positioning hole. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-6 The present invention provides a technical solution: a tapered roller bearing for a power head, which is composed of an outer ring body 1, an inner ring body 2, a retainer 3 and a tapered roller body 4, wherein the generatrix of the tapered roller body 4 contacts the raceway of the outer ring body 1 and the raceway of the inner ring, and the tapered roller body 4 is installed in the pocket of the retainer 3, and the retainer 3 provides support and positioning for the tapered roller body 4, and the sides of the outer ring body 1 and the inner ring body 2 are respectively provided with an outer ring protrusion 5 and an inner ring protrusion 6, and the length of the outer ring protrusion 5 is equal to the length of the inner ring protrusion 6, and the outer ring protrusion 5 and the inner ring protrusion 6 are arranged in mirror symmetry, and the preload of the assembled bearing is realized by the cooperation of the outer ring protrusion 5 and the inner ring protrusion 6, and the positions of different bearings can be interchanged without affecting the installation preload force;

[0039] An outer ring connecting groove 101 is provided on the inner side of the outer ring body 1, and an inner ring connecting groove 201 is provided on the outer side of the inner ring body 2. The outer ring connecting groove 101 and the inner ring connecting groove 201 respectively constitute the raceways of the outer ring body 1 and the inner ring body 2. The tapered roller body 4 is connected to the inner ring body 2 and the outer ring body 1 through the inner ring connecting groove 201 and the outer ring connecting groove 101 respectively, and the outer ring connecting groove 101, the inner ring connecting groove 201 and the surface of the tapered roller body 4 are arranged in parallel.

[0040] By setting the outer ring protrusion 5 and the inner ring protrusion 6, the following can be achieved: 1. Clearance adjustment can be performed without the aid of adjusting washers, which greatly improves assembly efficiency and precise control of clearance; 2. Even if adjusting washers are required, it is only necessary to make the inner and outer washers equal in height, eliminating the tedious process of grinding the height difference; 3. Precise control of the protrusions on the front and back sides can improve the consistency of bearing assembly clearance; 4. Universal matching bearings can be arbitrarily changed in assembly form, which greatly improves assembly flexibility, such as Figure 2 As shown, there is a certain outer ring protrusion 5 and inner ring protrusion 6 between the outer ring body 1 and the inner ring body 2, and the outer ring protrusion 5 and the inner ring protrusion 6 are equal in size. This size has been set during the bearing processing process. Therefore, the preload of the assembled bearing can be achieved without using an adjusting washer, and different bearings can be interchanged without affecting the installation preload force.

[0041] like Figure 3 As shown in the figure, the commonly used assembly method of single-row universal tapered roller bearings, the positions of individual bearings in the group are interchangeable;

[0042] A lubrication mechanism is arranged inside the outer ring body 1 to lubricate the tapered roller body 4 in the outer ring connecting groove 101 to reduce the friction force it encounters during rotation. The lubrication mechanism includes an oil storage tank 7, an oil outlet 8, an extrusion plug 9 and a position control unit.

[0043] An oil storage tank 7 is arranged inside the outer ring body 1 and is used for storing oil;

[0044] The oil outlet 8 is provided on the inner side of the oil storage tank 7 and is used to transfer the oil in the oil storage tank 7 to the outer ring connecting groove 101;

[0045] The extrusion plug 9 is slidably mounted inside the oil storage bin 7 and fits against the inner wall of the oil storage bin 7. The oil is squeezed and discharged by moving inside the oil storage bin 7.

[0046] The position control unit is installed on the surface of the extrusion plug 9 to control the position of the extrusion plug 9. The oil storage tank 7 is designed in an arc-shaped structure, and the oil storage tank 7 is arranged at equal angles inside the outer ring body 1, and the oil outlets 8 are evenly distributed on the surface of the oil storage tank 7. The position control unit is composed of an adjusting rod 10 and a rotating head 11;

[0047] The adjusting rod 10 and the bearing are installed on the outside of the extrusion plug 9, and the adjusting rod 10 and the outer ring body 1 form a threaded connection, which can drive the extrusion plug 9 to move when rotating;

[0048] The rotating head 11 is fixed to the end of the adjusting rod 10 to drive the adjusting rod 10 to rotate, and a cross groove is provided on the surface of the rotating head 11 for connecting with a screwdriver;

[0049] When the tapered roller body 4 needs to be lubricated, the rotating head 11 can be screwed by a screwdriver, and the rotating head 11 drives the adjusting rod 10 to rotate. The adjusting rod 10 pushes the extrusion plug 9 to move in the oil storage tank 7 through the threaded connection between the adjusting rod 10 and the outer ring body 1, and the oil body is squeezed and discharged through the oil outlet 8, so as to lubricate the tapered roller body 4 and reduce the friction force it is subjected to during rotation;

[0050] A gap filling mechanism is provided inside the inner ring body 2 to increase the stability of the connection between the inner ring body 2 and the connecting piece. The gap filling mechanism includes a first airbag 12, a rubber pad 13, a connecting pipe 14, a second airbag 15, a pressing block 16 and a positioning hole 17;

[0051] The first airbag 12 is annularly arranged inside the inner ring body 2;

[0052] A rubber pad 13 is arranged on the outer side of the first airbag 12 to provide protection therefor;

[0053] A connecting pipe 14 is installed on the surface of the first airbag 12 for conveying gas;

[0054] The second airbag 15 is connected to the first airbag 12 through the connecting tube 14, and the elastic contraction force of the second airbag 15 is smaller than the elastic contraction force of the first airbag 12. In the default state, the first airbag 12 remains in a contracted state;

[0055] A pressing block 16, disposed outside the second airbag 15 and used for pressing the second airbag 15;

[0056] A positioning hole 17 is provided above the pressing block 16 and penetrates the surface of the inner ring body 2;

[0057] When the connecting piece is installed inside the inner ring body 2, a protrusion corresponding to the positioning hole 17 can be set on the connecting piece, and the protrusion can be inserted into the positioning hole 17 to squeeze the pressure block 16. The pressure block 16 can squeeze the second airbag 15 so that the internal gas of the airbag 15 enters the first airbag 12 through the connecting tube 14. The first airbag 12 expands and pushes the rubber pad 13 to move and contact the connecting piece, thereby blocking the connection gap, reducing the subsequent vibration, and improving the stability of the connection between the connecting piece and the inner ring body 2.

[0058] Working principle: When using the special tapered roller bearing for the power head, according to Figure 1-2 As shown, the outer ring body 1 and the inner ring body 2 have a certain outer ring protrusion 5 and inner ring protrusion 6, and the outer ring protrusion 5 and the inner ring protrusion 6 are equal in size. This size has been set during the bearing processing process. Therefore, the preload of the assembled bearing can be achieved without using an adjusting washer, and different bearings can be interchanged without affecting the installation preload force. Figure 3As shown in the figure, the commonly used assembly method of single-row universal tapered roller bearings. The positions of individual bearings in the group are interchangeable, which greatly improves the assembly flexibility. The precise control of the outer ring protrusion 5 and the inner ring protrusion 6 can improve the consistency of the bearing assembly clearance.

[0059] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tapered roller bearing for a power head, comprising an outer ring body (1), an inner ring body (2), a retainer (3) and a tapered roller body (4), wherein the generatrix of the tapered roller body (4) is in contact with the raceway of the outer ring body (1) and the raceway of the inner ring, and the tapered roller body (4) is installed in the pocket of the retainer (3), and the retainer (3) provides support and positioning for the tapered roller body (4); Features: The outer ring body (1) and the inner ring body (2) are respectively provided with an outer ring protrusion (5) and an inner ring protrusion (6), and the length of the outer ring protrusion (5) is equal to the length of the inner ring protrusion (6), and the outer ring protrusion (5) and the inner ring protrusion (6) are arranged in a mirror-symmetrical manner, and the preload of the assembled bearing is achieved by matching the outer ring protrusion (5) and the inner ring protrusion (6), and different bearings can be interchanged without affecting the installation preload force; An outer ring connecting groove (101) is provided on the inner side of the outer ring body (1), and an inner ring connecting groove (201) is provided on the outer side of the inner ring body (2); the outer ring connecting groove (101) and the inner ring connecting groove (201) respectively constitute the raceways of the outer ring body (1) and the inner ring body (2); A gap filling mechanism is provided inside the inner ring body (2) to increase the stability of the connection between the inner ring body (2) and the connecting piece; The gap filling mechanism comprises a first airbag (12), a rubber pad (13), a connecting pipe (14), a second airbag (15), a pressing block (16) and a positioning hole (17); A first airbag (12) is arranged in an annular shape inside the inner ring body (2); A rubber pad (13) is arranged on the outside of the first airbag (12) to provide protection for the first airbag; A connecting pipe (14) installed on the surface of the first air bag (12) for transporting gas; The second airbag (15) is connected to the first airbag (12) via a connecting tube (14), and the elastic contraction force of the second airbag (15) is smaller than the elastic contraction force of the first airbag (12). In a default state, the first airbag (12) remains in a contracted state; A pressing block (16) is arranged outside the second airbag (15) and is used for pressing the second airbag (15); The positioning hole (17) is arranged above the pressing block (16) and penetrates the surface of the inner ring body (2).

2. The tapered roller bearing for a power head according to claim 1, characterized in that: The tapered roller body (4) is connected to the inner ring body (2) and the outer ring body (1) respectively through the inner ring connecting groove (201) and the outer ring connecting groove (101), and the outer ring connecting groove (101) and the inner ring connecting groove (201) are arranged in parallel with the surface of the tapered roller body (4).

3. The tapered roller bearing for the power head according to claim 2, characterized in that: A lubrication mechanism is arranged inside the outer ring body (1) to lubricate the tapered roller body (4) in the outer ring connecting groove (101) to reduce the friction force it encounters when rotating.

4. The tapered roller bearing for a power head according to claim 3, characterized in that: The lubrication mechanism comprises an oil storage tank (7), an oil outlet (8), an extrusion plug (9) and a position control unit; An oil storage tank (7) is arranged inside the outer ring body (1) and is used for storing oil; An oil outlet (8) is provided on the inner side of the oil storage tank (7) and is used to transfer the oil in the oil storage tank (7) to the outer ring connecting groove (101); The extrusion plug (9) is slidably mounted inside the oil storage bin (7) and fits against the inner wall of the oil storage bin (7). The oil is extruded by moving inside the oil storage bin (7) to discharge the oil. The position control unit is installed on the surface of the extrusion plug (9) to control the position of the extrusion plug (9).

5. The tapered roller bearing for a power head according to claim 4, characterized in that: The oil storage bin (7) is designed to be an arc-shaped structure, and the oil storage bin (7) is arranged at equal angles inside the outer ring body (1), and the oil outlets (8) are evenly distributed on the surface of the oil storage bin (7).

6. The tapered roller bearing for a power head according to claim 4, characterized in that: The position control part is composed of an adjusting rod (10) and a rotating head (11); The adjusting rod (10) is bearing-mounted on the outside of the extrusion plug (9), and a threaded connection is formed between the adjusting rod (10) and the outer ring body (1), which can drive the extrusion plug (9) to move when rotating; The rotating head (11) is fixed on the end of the adjusting rod (10) to drive the adjusting rod (10) to rotate, and a cross groove is provided on the surface of the rotating head (11) for connecting with a screwdriver.

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