Six-axis robot quasi-hypoid gear transmission mechanism leak-proof crossed roller bearing

Abstract

This application relates to a leak-proof cross roller bearing for a quasi-hypoid gear transmission mechanism of a six-axis robot, comprising an inner bearing ring, an outer bearing ring, and an oil seal. An annular sealing groove and a roller groove are located between the inner and outer bearing rings. An leak-proof groove is formed on the outer wall of one end of the inner bearing ring, communicating with both the annular sealing groove and the roller groove. An insert is nested within the leak-proof groove and fixed to the inner bearing ring. The outer wall of the insert abuts against the outer wall of the roller within the roller groove. This leak-proof cross roller bearing for a quasi-hypoid gear transmission mechanism of a six-axis robot, by modifying the original outer ring opening structure and creating a groove on the oil seal side of the inner ring end face, allows for the use of inserts of the same size at the inner ring groove after roller assembly, and tightening with screws. This effectively prevents oil leakage during product use, increases product qualification rate, and extends the service life of the six-axis robot.

Description

Technical Field

[0001] This application relates to the field of bearing technology, and in particular to an oil-leakage-proof crossed roller bearing for a quasi-hypoid gear transmission mechanism for a six-axis robot. Background Technology

[0002] Existing crossed roller bearings used in six-axis robots typically employ an outer ring bore for roller mounting, such as... Figure 1 As shown, a plunger A is installed at the opening on the outer ring and fixed by a tapered pin B, sealed with an O-ring C. However, after a period of use, the O-ring C is prone to breakage, leading to oil leakage and thus affecting the service life of the roller bearing. Utility Model Content

[0003] The purpose of this application is to provide a leak-proof crossed roller bearing for a six-axis robot quasi-hypoid gear transmission mechanism that is simple in structure, easy to assemble, has good sealing effect, and can greatly improve service life.

[0004] To achieve the above objectives, this utility model provides a leak-proof crossed roller bearing for a quasi-hypoid gear transmission mechanism of a six-axis robot, comprising an inner bearing ring, an outer bearing ring, and an oil seal. The outer bearing ring is fitted outside the inner bearing ring, and a plurality of roller grooves are formed between the inner wall of the outer bearing ring and the outer wall of the inner bearing ring. An annular outer groove is formed on the outer wall of one end of the inner bearing ring, and an annular inner groove is formed on the inner wall of one end of the outer bearing ring. The annular outer groove and the annular inner groove are connected to form an annular sealing groove, which is correspondingly arranged on one side of the roller groove. The oil seal is nested in the annular sealing groove and can seal the gap between the roller groove and the inner and outer bearing rings. An oil leak-proof groove is formed on the outer wall of one end of the inner bearing ring, which is coaxially arranged with the annular outer groove. The oil leak-proof groove is connected to the annular sealing groove and the roller groove respectively. An insert is nested in the oil leak-proof groove. The insert is fixed to the inner bearing ring, and the outer wall of the insert can abut against the outer wall of the roller in the roller groove.

[0005] To further ensure sealing, the diameter of the circle containing the inner side of the oil leak-proof groove at the outer wall of the bearing inner ring is larger than the diameter of the circle containing the inner side of the annular outer groove at the outer wall of the bearing inner ring, and the diameter of the circle containing the outer side of the oil leak-proof groove is smaller than the diameter of the circle containing the center of the roller groove. The top surface of the oil leak-proof groove on one side of the annular sealing groove is flush with the bottom surface of the annular sealing groove, and the bottom surface of the oil leak-proof groove on one side of the roller groove is flush with the center surface of the roller groove.

[0006] To ensure a precise fit between the insert and the anti-leakage groove, the insert is a ring-shaped structure fitted onto the outer wall of the bearing inner ring. One end face of the insert is flush with the top surface of the anti-leakage groove located on one side of the ring-shaped sealing groove, and the opposite end face of the insert is flush with the bottom surface of the anti-leakage groove located on one side of the roller groove.

[0007] In order not to affect the roller groove, the diameter of the circle containing the outer wall of the insert is equal to the diameter of the circle containing the outer wall of the inner ring roller groove of the bearing.

[0008] To facilitate the mating of the insert and the roller, the outer wall of the insert has a conical surface that abuts against the outer wall of the roller in the roller groove.

[0009] To facilitate fixing the insert without affecting the oil seal, the insert is fixed to the inner ring of the bearing by countersunk screws, which are parallel to the axis of the inner ring of the bearing.

[0010] In summary, this utility model has the following beneficial effects: the oil-leakage-proof crossed roller bearing of the quasi-hypoid gear transmission mechanism of the six-axis robot changes the original outer ring opening structure and slots the inner ring end face with oil seal. After the rollers are assembled, the slotted part of the inner ring is fitted with inserts of the same size and tightened with screws, which can effectively avoid oil leakage problems during product use, increase the product qualification rate, and improve the service life of the six-axis robot. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a cross roller bearing in the prior art;

[0012] Figure 2 This is a schematic diagram of the anti-leakage crossed roller bearing of the quasi-hypoid gear transmission mechanism for a six-axis robot according to this utility model. Detailed Implementation

[0013] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0014] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0015] like Figure 2The diagram shows a leak-proof crossed roller bearing for a quasi-hypoid gear transmission mechanism in a six-axis robot. It includes an inner bearing ring 1, an outer bearing ring 2, and an oil seal 5. The outer bearing ring 2 is fitted over the inner bearing ring 1. Several roller grooves 3 are formed between the inner wall of the outer bearing ring 2 and the outer wall of the inner bearing ring 1 for mounting rollers. An annular outer groove is formed on the outer wall of one end of the inner bearing ring 1 (left end in the diagram), and an annular inner groove is formed on the inner wall of one end of the outer bearing ring 2. The annular outer groove and the annular inner groove are connected to form an annular sealing groove 4. The annular sealing groove 4 is correspondingly positioned on one side of the roller groove 3 (left side in the diagram). The oil seal 5... The oil seal 5 is nested within the annular sealing groove 4. The oil seal 5 is interference-fitted with the annular sealing groove 4, and the oil seal 5 can seal the gap between the roller groove 3 and the inner ring 1 and the outer ring 2 of the bearing. One end of the outer wall of the inner ring 1 of the bearing has an oil leakage prevention groove 6 coaxially arranged with the annular outer groove. The oil leakage prevention groove 6 is located between the annular sealing groove 4 and the roller groove 3. The oil leakage prevention groove 6 is connected to the annular sealing groove 4 and the roller groove 3 respectively. An insert 7 is nested in the oil leakage prevention groove 6. The insert 7 is fixed to the inner ring 1 of the bearing. The outer wall of the insert 7 can abut against the outer wall of the roller in the roller groove 3 to press the roller.

[0016] Specifically, the diameter of the circle containing the inner side of the oil-proof groove 6 at the outer wall of the inner ring 1 of the bearing is larger than the diameter of the circle containing the inner side of the annular outer groove at the outer wall of the inner ring 1 of the bearing. That is, there is a small step between the wall of the annular outer groove and the wall of the oil-proof groove 6. The diameter of the circle containing the outer side of the oil-proof groove 6 is smaller than the diameter of the circle containing the center of the roller groove 3. The top surface of the oil-proof groove 6 on one side of the annular sealing groove 4 (the left end face of the oil-proof groove 6 in the figure) is flush with the bottom surface of the annular sealing groove 4 (the right end face of the annular sealing groove 4 in the figure), and the bottom surface of the oil-proof groove 6 on one side of the roller groove 3 (the right end face of the oil-proof groove 6 in the figure) is flush with the center surface of the roller groove 3. In short, the inner diameter of the oil-proof groove 6 is larger than the inner diameter of the annular outer groove, and the outer diameter of the oil-proof groove 6 is smaller than the outer diameter of the annular sealing groove 4.

[0017] Corresponding to the oil leakage prevention groove 6, the insert 7 is a ring-shaped structure, fitted onto the outer wall of the bearing inner ring 1. The insert 7 is fixed to the bearing inner ring 1 by countersunk screws 8, which are parallel to the axis of the bearing inner ring 1. One end face of the insert 7 (the left end face of the insert 7 in the figure) is flush with the top end face of the oil leakage prevention groove 6 located on the side of the ring-shaped sealing groove 4 (the right end face of the ring-shaped sealing groove 4 in the figure). The opposite end face (the right end face of the insert 7 in the figure) is flush with the bottom end face of the oil leakage prevention groove 6 located on the side of the roller groove 3 (the right end face of the oil leakage prevention groove 6 in the figure). At the same time, the diameter of the circle containing the outer wall of the insert 7 is equal to the diameter of the circle containing the outer wall of the roller groove of the bearing inner ring 1, that is, the outer diameter of the insert 7 is the same as the maximum outer diameter of the bearing inner ring 1. The outer wall of the insert 7 has a conical surface that abuts against the outer wall of the roller in the roller groove 3, and the roller in the roller groove 3 can be pressed down by the conical surface.

[0018] During installation, first, place the outer ring 2 of the bearing over the inner ring 1 of the bearing. Then, insert the roller into the roller groove 3 through the oil leakage prevention groove 6. Next, press it down with the insert 7 and lock the insert 7. Finally, install the oil seal 5. This can effectively prevent oil leakage during product use.

[0019] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, principle and application direction of this application should be covered within the scope of protection of this application.

Claims

1. A leak-proof crossed roller bearing for a quasi-hypoid gear transmission mechanism of a six-axis robot, comprising an inner bearing ring, an outer bearing ring, and an oil seal. The outer bearing ring is fitted over the inner bearing ring. A plurality of roller grooves are formed between the inner wall of the outer bearing ring and the outer wall of the inner bearing ring. An annular outer groove is formed on the outer wall of one end of the inner bearing ring, and an annular inner groove is formed on the inner wall of one end of the outer bearing ring. The annular outer groove and the annular inner groove are connected to form an annular sealing groove, which is correspondingly positioned on one side of the roller grooves. The oil seal is nested within the annular sealing groove and is capable of sealing the roller grooves and the gap between the inner and outer bearing rings. The bearing is characterized in that: The outer wall of one end of the inner ring of the bearing is provided with an oil leakage prevention groove coaxially arranged with the annular outer groove. The oil leakage prevention groove is connected to the annular sealing groove and the roller groove respectively. An insert is nested in the oil leakage prevention groove. The insert is fixed to the inner ring of the bearing, and the outer wall of the insert can abut against the outer wall of the roller in the roller groove.

2. The anti-leakage crossed roller bearing for the quasi-hypoid gear transmission mechanism of a six-axis robot according to claim 1, characterized in that: The diameter of the circle on the inner side of the oil leak prevention groove located on the outer wall of the inner ring of the bearing is larger than the diameter of the circle on the inner side of the annular outer groove located on the outer wall of the inner ring of the bearing. The diameter of the circle on the outer side of the oil leak prevention groove is smaller than the diameter of the circle at the center of the roller groove. The top surface of the oil leak prevention groove on one side of the annular sealing groove is flush with the bottom surface of the annular sealing groove. The bottom surface of the oil leak prevention groove on one side of the roller groove is flush with the center surface of the roller groove.

3. The anti-leakage crossed roller bearing for the quasi-hypoid gear transmission mechanism of a six-axis robot according to claim 2, characterized in that: The insert is a ring-shaped structure, fitted onto the outer wall of the inner ring of the bearing. One end face of the insert is flush with the top surface of the oil leakage prevention groove located on one side of the ring-shaped sealing groove, and the opposite end face of the insert is flush with the bottom surface of the oil leakage prevention groove located on one side of the roller groove.

4. The anti-leakage crossed roller bearing for the quasi-hypoid gear transmission mechanism of a six-axis robot according to claim 3, characterized in that: The diameter of the circle containing the outer wall of the insert is equal to the diameter of the circle containing the outer wall of the inner ring roller groove of the bearing.

5. The anti-leakage crossed roller bearing for the quasi-hypoid gear transmission mechanism of a six-axis robot according to claim 4, characterized in that: The outer wall of the insert has a conical surface that abuts against the outer wall of the roller in the roller groove.

6. The anti-leakage crossed roller bearing for the quasi-hypoid gear transmission mechanism of a six-axis robot according to any one of claims 1-5, characterized in that: The insert is fixed to the inner ring of the bearing by countersunk screws, and the countersunk screws are parallel to the axis of the inner ring of the bearing.

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