A high-precision cylindrical roller bearing for industrial robots

Abstract

The present invention relates to the technical field of bearing design, specifically to a high-precision cylindrical roller bearing for industrial robots, including a bearing body, the bearing body including a bearing outer ring and a bearing inner ring, and a rolling groove for installing a cylindrical roller is formed between the bearing outer ring and the bearing inner ring. The high-precision cylindrical roller bearing for industrial robots proposed by the present invention can use a retaining frame to reduce the wear of the cylindrical roller during movement, store a large amount of lubricating oil in the oil storage cavity to maintain a good lubrication effect on the cylindrical roller, and can use a heat exchange device to reduce the bearing wear caused by bearing deformation caused by high temperature, thereby effectively improving the bearing and ensuring the bearing's motion accuracy, and also facilitating the maintenance of the bearing interior, solving the problem that the existing cylindrical roller bearing is easy to wear, resulting in the inability to ensure motion accuracy and high maintenance cost, and can effectively improve the motion accuracy of the cylindrical roller bearing and reduce the maintenance cost.

Description

Technical Field

[0001] The invention relates to the technical field of bearing design, in particular to a high-precision cylindrical roller bearing for an industrial robot. Background Art

[0002] Industrial robots are multi-joint manipulators or multi-degree-of-freedom mechanical devices widely used in industrial fields. They can perform autonomous operations through programmed control and are widely used in industrial fields such as electronics, logistics, and chemicals.

[0003] Industrial robots that need to fix or move large objects will be in a heavy-load state for a long time. At this time, the joints of the industrial robots will be more prone to wear. The joints of industrial robots generally require bearings to reduce friction, so this kind of wear is more likely to occur on the bearings at the joints. Therefore, for industrial robots that need to work under heavy loads for a long time, cylindrical roller bearings with stronger load-bearing capacity are generally selected.

[0004] However, the existing cylindrical roller bearing structure design is relatively simple, and it is difficult to ensure its own lubrication performance, which makes the bearing easy to wear when rotating, so that the rotation accuracy drops rapidly, making it difficult to maintain high-precision movement, and easily affecting the performance of industrial robots. At the same time, it is not convenient to maintain and reuse the internal parts after the wear occurs. The cylindrical roller bearing can only be replaced as a whole, so it is difficult to reduce the failure rate and increase the maintenance cost. The patent with application number CN117905789A and patent name "A Cylindrical Roller Bearing" adopts the form of setting an outer cylindrical roller and an inner cylindrical roller between the cylindrical roller and the cage to reduce the friction of the cylindrical roller, thereby increasing the service life of the cylindrical roller, but this method still cannot fundamentally solve the problem of increased wear of the cylindrical roller caused by lubrication problems and the inability to disassemble, maintain and reuse the cylindrical roller bearing.

[0005] Therefore, we need a high-precision cylindrical roller bearing for industrial robots to solve the problem that the existing cylindrical roller bearings are easy to wear, resulting in the inability to guarantee motion accuracy and high maintenance costs. This can effectively improve the motion accuracy of cylindrical roller bearings and reduce maintenance costs. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the existing cylindrical roller bearings are prone to wear, resulting in the inability to guarantee movement accuracy and high maintenance costs. The present application provides a high-precision cylindrical roller bearing for an industrial robot, which can effectively improve the movement accuracy of the cylindrical roller bearing and reduce maintenance costs.

[0007] To achieve the above object, the present invention provides the following technical solution: A high-precision cylindrical roller bearing for an industrial robot, comprising:

[0008] A bearing body, wherein the bearing body comprises a bearing outer ring and a bearing inner ring, and a rolling groove for installing a cylindrical roller is formed between the bearing outer ring and the bearing inner ring, and a leakage-proof device for preventing lubricating oil leakage is rotatably installed on the left and right sides of the bearing inner ring, and a sealing device is installed between the leakage-proof device and the bearing outer ring through a threaded connection, and an oil storage cavity is formed between the sealing device, the bearing outer ring and the bearing inner ring;

[0009] A retainer, the retainer comprises a fixed ring arranged between the outer ring of the bearing and the inner ring of the bearing, and an outer mating rotating shaft and an inner mating rotating shaft which are rotatably mounted in the fixed ring and are adapted to roll against the surface of the bearing roller, and an oil-permeable hole for connecting the rolling groove and the oil storage cavity is arranged on the fixed ring;

[0010] The heat exchange device comprises at least two annular tubes installed in the oil storage cavity, and the annular tubes are provided with a liquid inlet butt joint tube and a liquid discharge butt joint tube connected with an external coolant circulation supply device.

[0011] Preferably, the leakage prevention device includes a pair of connecting half rings rotatably fixed on the inner ring of the bearing, and the ends of the connecting half rings are provided with connecting protrusions, and the adjacent connecting protrusions on the two connecting half rings are fixedly connected by a second fixing screw, an annular sealing groove is provided on the inner ring of the bearing, and an annular sealing protrusion is jointly formed on the two connecting half rings and seals the rotation with the annular sealing groove, and the edge of the connecting half ring is screwed to the closing device.

[0012] Preferably, the sealing device comprises an annular cover which is respectively threadedly mounted on the bearing outer ring and the anti-leakage device, and the annular cover is fixedly mounted on the bearing outer ring by a third fixing screw, and a rotating mating protrusion for facilitating the rotation of the annular cover is provided on the outer side of the annular cover.

[0013] Preferably, an oil suction device for absorbing and storing lubricating oil is provided in the oil storage chamber, and the oil suction device includes an oil suction ring installed between the heat exchange device and the outer ring of the bearing, and the oil suction device is provided with an oil suction strip between the heat exchange device and the inner ring of the bearing, the oil suction ring and the oil suction strip are fixed by a connecting piece, and the oil suction strip and the oil suction ring are both made of oil-absorbing cotton, and a fixing needle for plugging and fixing the oil suction strip and the oil suction ring is fixedly installed on the annular cover.

[0014] Preferably, a fixing protrusion which is clamped and fixed with an external bearing seat is arranged on the outer wall surface of the bearing outer ring, and the bearing inner ring is fixedly mounted with the main shaft of the industrial robot through a spline.

[0015] Preferably, an oil filling hole for injecting lubricating oil into the oil storage chamber is opened on the outer ring of the bearing, and a sensor group electrically connected to an external controller and used to monitor the storage amount and temperature of the lubricating oil in the oil storage chamber is fixedly mounted on the outer ring of the bearing.

[0016] Preferably, a drain connecting pipe and an inlet connecting pipe connected to an external coolant circulation supply device are provided on the outer ring of the bearing, and the drain connecting pipe and the drain butt pipe as well as the inlet connecting pipe and the inlet butt pipe are respectively screwed and installed via fixed connecting pipes.

[0017] Preferably, the annular tubes are connected to each other via a connecting tube, and heat exchange fins for heat exchange are provided between the annular tubes.

[0018] Preferably, an isolation device is provided between the oil storage chamber and the rolling groove for filtering impurities in the lubricating oil and keeping the lubricating oil from entering the rolling groove in an orderly manner, and the isolation device includes an isolation frame fixed to the outer ring of the bearing by a first fixing screw, the isolation frame is rotatably installed between the inner ring of the bearing, and a filter membrane is provided on the isolation frame to facilitate the lubricating oil to enter the rolling groove from the oil storage chamber.

[0019] Preferably, auxiliary mounting frames for positioning and fixing the bearing inner ring and the leakage prevention device are arranged on the left and right sides of the bearing body, and the auxiliary mounting frames include a connecting seat, an annular arm is fixedly mounted on the connecting seat, and a plug-in column is arranged on the annular arm, a second positioning hole for plugging and mounting with the plug-in column is opened on the bearing inner ring, and a first positioning hole for plugging and mounting with the plug-in column is opened on the leakage prevention device.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The high-precision cylindrical roller bearing for an industrial robot proposed in the present invention can use a retaining frame to reduce the wear of the cylindrical roller during movement, store a large amount of lubricating oil in the oil storage chamber to maintain a good lubrication effect on the cylindrical roller, and can use a heat exchange device to reduce the bearing wear caused by bearing deformation caused by high temperature, thereby effectively improving the bearing and ensuring the movement accuracy of the bearing, and also facilitating the maintenance of the inside of the bearing, solving the problem that the existing cylindrical roller bearings are easy to wear, resulting in the inability to ensure movement accuracy and high maintenance costs, and can effectively improve the movement accuracy of the cylindrical roller bearings and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a side view of the structure of the present invention;

[0024] Figure 3 It is a cross-sectional view of the structure of the present invention;

[0025] Figure 4 for Figure 3 Schematic diagram of the structure of the middle A area;

[0026] Figure 5It is a schematic diagram of the structure of the leakage prevention device in the present invention;

[0027] Figure 6 It is a side view of the leakage prevention device of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the oil absorption device in the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the sealing device in the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the heat exchange device in the present invention;

[0031] Fig.10 It is a structural schematic diagram of the auxiliary mounting frame in the present invention;

[0032] Fig.11 It is a schematic diagram of the structure of the outer ring of the bearing in the present invention;

[0033] Fig.12 It is a schematic diagram of the structure of the inner ring of the bearing in the present invention;

[0034] Fig.13 It is a structural schematic diagram of the isolation device in the present invention;

[0035] Fig.14 It is a schematic diagram of the installation of the cylindrical roller and the fixing frame in the present invention.

[0036] In the figure: 1. bearing body; 101. outer ring of bearing; 102. inner ring of bearing; 103. cylindrical roller; 2. auxiliary mounting frame; 201. annular arm; 202. plug-in column; 203. connecting seat; 3. isolating device; 301. isolating frame; 302. first fixing screw; 303. filter membrane; 4. anti-leakage device; 401. second fixing screw; 402. connecting protrusion; 403. connecting half ring; 404. first positioning hole; 5. heat exchange device; 501. connecting pipe; 502. heat exchange plate; 503. liquid inlet butt joint pipe; 504. annular pipe; 505. liquid discharge butt joint pipe; 6. sealing Device; 601, annular cover; 602, third fixing screw; 603, fixing needle; 604, rotating matching protrusion; 7, oil suction device; 701, oil suction ring; 702, oil suction strip; 703, connecting piece; 8, retaining frame; 801, outer matching shaft; 802, fixing ring; 803, oil permeable hole; 804, inner matching shaft; 9, fixed connecting pipe; 10, annular sealing protrusion; 11, rolling groove; 12, annular sealing groove; 13, fixing protrusion; 14, oil filling hole; 15, sensor group; 16, drain connecting pipe; 17, liquid inlet connecting pipe; 18, oil storage chamber; 19, second positioning hole. DETAILED DESCRIPTION

[0037] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit 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] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, 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 the present invention can be understood according to specific circumstances.

[0040] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0041] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 , Fig. 9 , Fig.11 , Fig.12 and Fig.14The present invention provides a high-precision cylindrical roller bearing for an industrial robot, comprising a bearing body 1, a retaining frame 8 and a heat exchange device 5. The bearing body 1 comprises a bearing outer ring 101 and a bearing inner ring 102, and a rolling groove 11 for installing a cylindrical roller 103 is formed between the bearing outer ring 101 and the bearing inner ring 102. The number of cylindrical rollers 103 installed in the rolling groove 11 is at least four, and varies according to the specific size and model of the cylindrical roller bearing. A leakage-proof device 4 for preventing leakage of lubricating oil is rotatably installed on the left and right sides of the bearing inner ring 102, and a sealing device 6 is installed between the leakage-proof device 4 and the bearing outer ring 101 through a threaded connection. An oil storage chamber 18 is formed between the sealing device 6, the bearing outer ring 101 and the bearing inner ring 102, and the oil storage chamber 18 is used to store lubricating oil and to heat the cylindrical rollers 103 located in the rolling groove 11. The roller 103 is lubricated, and a fixing protrusion 13 that is clamped and fixed to an external bearing seat is provided on the outer wall surface of the bearing outer ring 101, and the bearing inner ring 102 is fixedly installed with the main shaft of the industrial robot through a spline. Therefore, the bearing outer ring 101 is fixed and does not rotate, and the bearing outer ring 101 rotates with the robot main shaft. A fixing protrusion 13 that is clamped and fixed to an external bearing seat is provided on the outer wall surface of the bearing outer ring 101, and the bearing inner ring 102 is fixedly installed with the main shaft of the industrial robot through a spline. An oil filling hole 14 for injecting lubricating oil into the oil storage chamber 18 is opened on the bearing outer ring 101, and a sensor group 15 that is electrically connected to an external controller and is used to monitor the storage amount and temperature of the lubricating oil in the oil storage chamber 18 is fixedly installed on the bearing outer ring 101, and the sensor group 15 at least includes a temperature detection sensor and a liquid level sensor.

[0042] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The leakage prevention device 4 includes a pair of connecting half rings 403 rotatably fixed on the bearing inner ring 102, and the ends of the connecting half rings 403 are provided with connecting protrusions 402, and the adjacent connecting protrusions 402 on the two connecting half rings 403 are fixedly connected by second fixing screws 401, an annular sealing groove 12 is provided on the bearing inner ring 102, and an annular sealing protrusion 10 that is sealed and rotated with the annular sealing groove 12 is formed together on the two connecting half rings 403, and the edge of the connecting half ring 403 is screwed and installed with the closing device 6, the number of annular sealing grooves 12 provided on the bearing inner ring 102 can be determined according to the use requirements, and at least three can be provided when the sealing requirement is high, the number of annular sealing protrusions 10 and the number of annular sealing grooves 12 are matched, and the cooperation of the annular sealing protrusions 10 and the annular sealing grooves 12 can effectively prevent the lubricating oil from leaking from between the leakage prevention device 4 and the bearing inner ring 102, and the bearing inner ring 102 and the leakage prevention device 4 can still rotate normally.

[0043] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 The closing device 6 includes an annular cover 601 which is screwed to the bearing outer ring 101 and the anti-leakage device 4 respectively, and the annular cover 601 is fixed to the bearing outer ring 101 by a third fixing screw 602. A rotating mating protrusion 604 which is convenient for rotating the annular cover 601 is provided on the outer side of the annular cover 601. The rotating mating protrusion 604 can drive the annular cover 601 to rotate, so that the annular cover 601 can be screwed to the bearing outer ring 101 and the anti-leakage device 4.

[0044] See also Figure 3 and Fig.14The retainer 8 includes a fixed ring 802 disposed between the bearing outer ring 101 and the bearing inner ring 102, and an outer mating shaft 801 and an inner mating shaft 804 that are rotatably mounted in the fixed ring 802 and that are in contact with and roll against the surface of the cylindrical roller 103. The fixed ring 802 is provided with an oil-permeable hole 803 for connecting the rolling groove 11 and the oil storage chamber 18. The outer mating shaft 801 and the inner mating shaft 804 are used to fill the gap between the cylindrical rollers 103, and at the same time, the outer mating shaft 801 and the inner mating shaft 804 can be in contact with the cylindrical roller 103. The surface of the roller 103 rotates with the cylindrical roller 103, thereby reducing the friction between the cylindrical roller 103 and the retainer 8 when they are released. After the lubricating oil enters the rolling groove 11 through the oil hole 803, it can also be coated on the surface of the cylindrical roller 103 through the outer matching shaft 801 and the inner matching shaft 804, thereby further reducing the friction resistance and the wear caused by friction. In this way, the rotation accuracy of the bearing can be guaranteed. It should be noted that the installation position of the outer matching shaft 801 is that the cylindrical roller 103 is close to the shaft The outer mating shaft 801 is arranged on one side of the outer ring 101 of the bearing, and the inner mating shaft 804 is installed on the side of the cylindrical roller 103 close to the inner ring 102 of the bearing, and the outer mating shaft 801 and the cylindrical roller 103 are arranged alternately but will not contact with two adjacent cylindrical rollers 103 at the same time, and the inner mating shaft 804 and the cylindrical roller 103 are arranged alternately but will not contact with two adjacent cylindrical rollers 103 at the same time. When the outer mating shaft 801 uniformly contacts the cylindrical roller 103 located on its left side, the corresponding inner mating shaft 80 4 is uniformly released from the cylindrical roller 103 located on the right side thereof. On the contrary, when the outer mating rotating shaft 801 is uniformly in contact with the cylindrical roller 103 located on the right side thereof, the corresponding inner mating rotating shaft 804 is uniformly in contact with the cylindrical roller 103 located on the left side thereof. This method avoids the problem that the outer mating rotating shaft 801 and the inner mating rotating shaft 804 are in contact with two adjacent cylindrical rollers 103 at the same time, causing the cylindrical roller 103 to be unable to rotate normally, thereby ensuring that the cylindrical roller 103 can rotate normally.

[0045] See also Figure 3 , Figure 4 and Fig. 9The heat exchange device 5 includes at least two annular tubes 504 installed in the oil storage chamber 18, and the annular tubes 504 are provided with a liquid inlet butt joint 503 and a liquid discharge butt joint 505 connected to the external coolant circulation supply device, and the bearing outer ring 101 is provided with a liquid discharge connecting pipe 16 and a liquid inlet connecting pipe 17, and the liquid discharge connecting pipe 16 and the liquid discharge butt joint 505 and the liquid inlet connecting pipe 17 and the liquid inlet butt joint 503 are respectively screwed and installed through a fixed connecting pipe 9, and the annular tubes 504 are connected through a connecting pipe 501, and heat exchange fins 502 for heat exchange are provided between the annular tubes 504. When the coolant enters the annular tube 504 from the liquid inlet butt joint 503, the coolant will continue to move along the annular tube 504 to the liquid discharge butt joint 505. Then it returns to the external coolant circulation supply device. When the coolant passes through the annular tube 504, the coolant will exchange heat with the lubricating oil in the oil storage chamber 18 through the outer wall of the annular tube 504 and the heat exchange plate 502, and the lubricating oil can transfer the heat generated by the cylindrical roller 103 during rotation to the coolant, thereby cooling the bearing and avoiding the problems of increased wear and lubricating oil leakage caused by overheating of the bearing. At the same time, it also avoids severe deformation of the bearing caused by high temperature, thereby causing increased wear. At least one pair of connecting tubes 501 is arranged in a circular array between the annular tubes 504. The connecting tube 501 is used to connect the annular tubes 504. When a part of the area of ​​one of the annular tubes 504 is blocked or concave itself, When the coolant channel is narrow, the coolant in the adjacent annular tube 504 connected by the connecting tube 501 will enter the faulty annular tube 504 through the connecting tube 501 for cooling, thereby effectively improving the working reliability of the heat exchange device 5. When the cylindrical roller bearing is assembled, since the heat exchange device 5 is installed into the oil storage chamber 18 before the closing device 6 is installed, in order to enable normal installation, the liquid inlet butt joint 503 and the liquid inlet connecting pipe 17 are separated, and the liquid discharge butt joint 505 and the liquid discharge connecting pipe 16 are also separated. If a hose is used to directly connect the liquid inlet butt joint 503 to the liquid inlet connecting pipe 17, and the liquid discharge butt joint 505 and the liquid discharge connecting pipe 16 are directly connected through the hose When the liquid inlet butt joint 503 is connected to the liquid inlet connecting pipe 17 by the fixed connecting pipe 9, the fixed connecting pipe 9 is first inserted into the liquid inlet connecting pipe 17, and then the upper end of the fixed connecting pipe 9 is screwed to the liquid inlet connecting pipe 17 by threads, and the corresponding bottom of the fixed connecting pipe 9 is also screwed to the end of the liquid inlet butt joint 503 by threads.Thus, the liquid inlet butt joint pipe 503, the fixed connecting pipe 9 and the liquid inlet connecting pipe 17 can be fixed together by threads, and the corresponding liquid discharge butt joint pipe 505, the fixed connecting pipe 9 and the liquid discharge connecting pipe 16 are also fixed together in this way to achieve connection. This connection method can also be used to remove the fixed connecting pipe 9 first and then remove the heat exchange device 5 from the oil storage chamber 18 during maintenance, thereby facilitating maintenance.

[0046] See also Figure 3 , Figure 4 and Figure 7 The oil storage chamber 18 is provided with an oil suction device 7 for absorbing and storing lubricating oil, and the oil suction device 7 includes an oil suction ring 701 installed between the heat exchange device 5 and the bearing outer ring 101, and the oil suction device 7 is provided with an oil suction strip 702 between the heat exchange device 5 and the bearing inner ring 102, and the oil suction ring 701 and the oil suction strip 702 are fixed by a connecting piece 703, and the oil suction strip 702 and the oil suction ring 701 are both made of oil-absorbing cotton, and a fixing needle 603 for plugging and fixing the oil suction strip 702 and the oil suction ring 701 is fixedly installed on the annular cover 601 When the cylindrical roller bearing is moving, the bearing itself will vibrate, causing the lubricating oil to move in the oil storage chamber 18. This movement will affect the rotation of the cylindrical roller 103. Therefore, the use of the oil suction device 7 to absorb and fix the lubricating oil can effectively reduce the interference caused by the movement of the lubricating oil. When the lubricating oil in the rolling groove 11 is insufficient, the lubricating oil will seep out of the oil suction device 7 to maintain the lubrication of the rolling groove 11 and the cylindrical roller 103, thereby ensuring the normal lubrication effect of the cylindrical roller bearing.

[0047] The cylindrical roller bearing designed by the present invention can use a retaining frame 8 to reduce the wear of the cylindrical roller 103 during movement, and can store a large amount of lubricating oil through the oil storage chamber 18 to maintain a good lubrication effect on the cylindrical roller 103. At the same time, the heat exchange device 5 can be used to reduce the bearing wear caused by bearing deformation caused by high temperature, thereby effectively improving the bearing and ensuring the bearing's movement accuracy, and also facilitating the maintenance of the inside of the bearing, solving the problem that the existing cylindrical roller bearings are easy to wear, resulting in the inability to ensure movement accuracy and high maintenance costs, and can effectively improve the movement accuracy of the cylindrical roller bearings and reduce maintenance costs.

[0048] Example 2: Please refer to Figure 3 , Figure 4 and Fig.13On the basis of the first embodiment, an isolation device 3 for filtering lubricating oil impurities and keeping the lubricating oil entering the rolling groove 11 in an orderly manner is provided between the oil storage chamber 18 and the rolling groove 11, and the isolation device 3 includes an isolation frame 301 fixed to the bearing outer ring 101 by a first fixing screw 302, and the isolation frame 301 is rotatably installed between the bearing inner ring 102, and a filter membrane 303 is provided on the isolation frame 301 to facilitate the lubricating oil to enter the rolling groove 11 from the oil storage chamber 18. The lubricating oil in the oil storage chamber 18 needs to pass through the filter membrane 303 before it can enter the rolling groove 11 to lubricate the cylindrical roller 103. This method has the following advantages. First, when the lubricating oil passes through the filter membrane 303, the impurities or agglomerated oil stains in the lubricating oil will not be able to pass through the filter membrane 303 but will remain in the oil storage chamber 18, thereby preventing these impurities or agglomerated oil stains from affecting the cylindrical roller 103. The movement accuracy is improved, and the lubricating oil in the oil storage chamber 18 and the lubricating oil in the rolling groove 11 are isolated. In this way, when the bearing rotates, the lubricating oil in the rolling groove 11 and the lubricating oil in the oil storage chamber 18 are prevented from being quickly exchanged. Since the lubricating oil in the rolling groove 11 is in a high-speed movement state, and the lubricating oil in the oil storage chamber 18 is in a low-speed state, this rapid exchange of lubricating oil will vibrate the cylindrical roller 103, thereby affecting the movement accuracy of the cylindrical roller bearing. Therefore, the isolation device 3 is used for isolation, which can effectively avoid the rapid exchange of the lubricating oil in the oil storage chamber 18 and the lubricating oil in the rolling groove 11, thereby reducing this vibration, further solving the problem that the existing cylindrical roller bearings are easy to wear, resulting in the inability to guarantee the movement accuracy and high maintenance cost, and can effectively improve the movement accuracy of the cylindrical roller bearing and reduce the maintenance cost.

[0049] Example 3: Please refer to Figure 1 , Figure 2 , Figure 3 and Fig.10On the basis of the second embodiment, auxiliary mounting frames 2 for positioning and fixing the bearing inner ring 102 and the leakage prevention device 4 are arranged on the left and right sides of the bearing main body 1, and the auxiliary mounting frame 2 includes a connecting seat 203, on which an annular arm 201 is fixedly mounted, and on which a plug-in column 202 is arranged, and on the inner ring 102 of the bearing is provided a second positioning hole 19 for plugging and mounting with the plug-in column 202, and on the leakage prevention device 4 is provided a first positioning hole 404 for plugging and mounting with the plug-in column 202, and the auxiliary mounting frame 2 is used to assist in installing the closing device 6 on the leakage prevention device 4, and when the closing device 6 needs to be installed, since the leakage prevention device 4 is in a rotating state, and the closing device 6 needs to be screwed and mounted with the leakage prevention device 4 and the bearing outer ring 101 at the same time, it is necessary to fix the leakage prevention device 4 first, which requires the use of the auxiliary mounting frame 2, and first rotate the leakage prevention device 4 The arrangement 4 enables the first positioning hole 404 on the leakage prevention device 4 to correspond to the second positioning hole 19 located on the bearing inner ring 102, and then the auxiliary mounting frame 2 is installed from the front and rear ends of the bearing inner ring 102, so that the first positioning hole 404 and the second positioning hole 19 can be simultaneously plugged into the corresponding plug-in column 202 located on the annular arm 201. At this time, the leakage prevention device 4 and the bearing inner ring 102 are fixed by using the auxiliary mounting frame 2, and then the operator holds or clamps the connecting seat 203 and adjusts the relative rotation angle between the bearing outer ring 101 and the bearing inner ring 102 so that the closing device 6 can be screwed and installed with the bearing outer ring 101 and the leakage prevention device 4 at the same time, which further solves the problem that the existing cylindrical roller bearings are easy to wear, resulting in the inability to guarantee the motion accuracy and high maintenance cost, and can effectively improve the motion accuracy of the cylindrical roller bearings and reduce the maintenance cost.

[0050] Embodiment 4: Based on Embodiment 3, the present invention further provides a method for using a high-precision cylindrical roller bearing for an industrial robot, comprising the following steps:

[0051] Step 1: First, install the inner mating shaft 804 on the fixing ring 802, then sleeve the fixing ring 802 with the rolling groove 11, then install the cylindrical roller 103 into the rolling groove 11 and correctly match it with the inner mating shaft 804, then correctly install the outer mating shaft 801 on the fixing ring 802 and correctly match it with the cylindrical roller 103, then install the bearing outer ring 101 to the outside of the cylindrical roller 103, then fix the isolation device 3 on the bearing outer ring 101 through the first fixing screw 302, and then install the leakage prevention device 4 through the first fixing screw 302. The second fixing screw 401 is fixed on the bearing inner ring 102, and then the heat exchange device 5 and the oil suction device 7 are correctly combined and placed in the oil storage chamber 18, and then the heat exchange device 5 is correctly fixed by fixing the connecting pipe 9, and then the leakage prevention device 4 is fixed to the bearing inner ring 102 through the auxiliary mounting frame 2, and then the relative rotation angle between the bearing outer ring 101 and the bearing inner ring 102 is adjusted, and the closing device 6 can be correctly fixed between the bearing outer ring 101 and the leakage prevention device 4 to complete the overall assembly of the cylindrical roller bearing, and the auxiliary mounting frame 2 is removed after the assembly is completed;

[0052] Step 2: When installing the cylindrical roller bearing on the bearing seat, first insert the bearing outer ring 101 into the bearing seat, and at the same time correctly fix the fixing protrusion 13 with the corresponding slot on the bearing seat, then correctly connect the external coolant circulation supply equipment with the drain connecting pipe 16 and the liquid inlet connecting pipe 17, and then correctly connect the sensor group 15 with the external controller electrically, and then inject a preset amount of lubricating oil into the oil storage chamber 18 through the oil injection hole 14, and then close the oil injection hole 14, or directly connect the oil injection hole 14 with the external oil injection equipment for a long time to facilitate the injection of lubricating oil into the oil storage chamber 18 at any time, then correctly install the main shaft of the industrial robot and the bearing inner ring 102, and then correctly fix the bearing body 1 and the bearing seat through the bearing end cover;

[0053] Step three: When the cylindrical roller bearing is working normally, the external controller will detect the temperature and liquid level of the lubricating oil in the oil storage chamber 18 through the sensor group 15, and then use the external coolant circulation supply equipment to supply coolant to the heat exchange device 5 to cool the lubricating oil in the oil storage chamber 18. At the same time, when the lubricating oil reserve in the oil storage chamber 18 is insufficient, the corresponding alarm can be used to remind the user to add lubricating oil. When the cylindrical roller bearing fails, it is also convenient and quick to disassemble. The disassembly process is opposite to the installation process in step one, which facilitates maintenance.

[0054] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A high-precision cylindrical roller bearing for industrial robots, characterized in that: include: A bearing body (1), the bearing body (1) comprising a bearing outer ring (101) and a bearing inner ring (102), wherein a rolling groove (11) for mounting a cylindrical roller (103) is formed between the bearing outer ring (101) and the bearing inner ring (102), a leakage prevention device (4) for preventing lubricating oil leakage is rotatably mounted on the left and right sides of the bearing inner ring (102), and a sealing device (6) is installed between the leakage prevention device (4) and the bearing outer ring (101) by threaded connection, and an oil storage chamber (18) is formed between the sealing device (6), the bearing outer ring (101) and the bearing inner ring (102); A retainer (8), the retainer (8) comprising a fixed ring (802) arranged between a bearing outer ring (101) and a bearing inner ring (102), an outer mating rotating shaft (801) and an inner mating rotating shaft (804) rotatably mounted in the fixed ring (802) and adapted to roll in contact with the surface of a cylindrical roller (103), and an oil-permeable hole (803) for connecting the rolling groove (11) and the oil storage chamber (18) is provided on the fixed ring (802); A heat exchange device (5), the heat exchange device (5) comprising at least two annular tubes (504) installed in an oil storage cavity (18), and the annular tubes (504) are provided with a liquid inlet butt joint (503) and a liquid discharge butt joint (505) connected to an external coolant circulation supply device; the bearing outer ring (101) is provided with a liquid discharge connecting pipe (16) and a liquid inlet connecting pipe (17) connected to the external coolant circulation supply device, and the liquid discharge connecting pipe (16) and the liquid discharge butt joint (505) and the liquid inlet connecting pipe (17) and the liquid inlet butt joint (503) are respectively screwed and installed via fixed connecting pipes (9); the annular tubes (504) are connected via a connecting pipe (501), and heat exchange fins (502) for heat exchange are provided between the annular tubes (504).

2. A high-precision cylindrical roller bearing for an industrial robot according to claim 1, characterized in that: The anti-leakage device (4) comprises a pair of connecting half rings (403) rotatably fixed on the bearing inner ring (102), and the ends of the connecting half rings (403) are provided with connecting protrusions (402), and the adjacent connecting protrusions (402) on the two connecting half rings (403) are fixedly connected by a second fixing screw (401), the bearing inner ring (102) is provided with an annular sealing groove (12), and the two connecting half rings (403) are jointly formed with an annular sealing protrusion (10) that is rotatably sealed with the annular sealing groove (12), and the edges of the connecting half rings (403) are screwed to the sealing device (6).

3. The high-precision cylindrical roller bearing for an industrial robot according to claim 1, characterized in that: The sealing device (6) comprises an annular cover (601) which is screwed to the bearing outer ring (101) and the anti-leakage device (4) respectively, and the annular cover (601) is fixed to the bearing outer ring (101) by a third fixing screw (602), and a rotational matching protrusion (604) is provided on the outer side of the annular cover (601) for facilitating the rotation of the annular cover (601).

4. A high-precision cylindrical roller bearing for an industrial robot according to claim 3, characterized in that: An oil suction device (7) for absorbing and storing lubricating oil is arranged in the oil storage cavity (18), and the oil suction device (7) comprises an oil suction ring (701) installed between the heat exchange device (5) and the bearing outer ring (101), and an oil suction strip (702) is arranged between the heat exchange device (5) and the bearing inner ring (102) of the oil suction device (7), and the oil suction ring (701) and the oil suction strip (702) are fixed by a connecting piece (703), and the oil suction strip (702) and the oil suction ring (701) are both made of oil-absorbing cotton, and a fixing needle (603) for plugging and fixing the oil suction strip (702) and the oil suction ring (701) is fixedly installed on the annular cover (601).

5. The high-precision cylindrical roller bearing for an industrial robot according to claim 1, characterized in that: A fixing protrusion (13) which is clamped and fixed to an external bearing seat is provided on the outer wall surface of the bearing outer ring (101), and the bearing inner ring (102) is fixedly mounted to the main shaft of the industrial robot via a spline.

6. The high-precision cylindrical roller bearing for an industrial robot according to claim 1, characterized in that: The bearing outer ring (101) is provided with an oil injection hole (14) for injecting lubricating oil into the oil storage chamber (18), and a sensor group (15) electrically connected to an external controller and used for monitoring the storage amount and temperature of the lubricating oil in the oil storage chamber (18) is fixedly mounted on the bearing outer ring (101).

7. The high-precision cylindrical roller bearing for an industrial robot according to claim 1, characterized in that: An isolation device (3) for filtering impurities in the lubricating oil and keeping the lubricating oil from entering the rolling groove (11) in an orderly manner is provided between the oil storage chamber (18) and the rolling groove (11), and the isolation device (3) comprises an isolation frame (301) fixed to the bearing outer ring (101) by a first fixing screw (302), the isolation frame (301) being rotatably mounted on the bearing inner ring (102), and a filter membrane (303) is provided on the isolation frame (301) for facilitating the lubricating oil from the oil storage chamber (18) into entering the rolling groove (11).

8. The high-precision cylindrical roller bearing for an industrial robot according to claim 1, characterized in that: Auxiliary mounting frames (2) for positioning and fixing the bearing inner ring (102) and the anti-leakage device (4) are arranged on the left and right sides of the bearing body (1), and the auxiliary mounting frames (2) include a connecting seat (203), an annular arm (201) is fixedly mounted on the connecting seat (203), and a plug-in column (202) is arranged on the annular arm (201), a second positioning hole (19) for plugging and mounting with the plug-in column (202) is provided on the bearing inner ring (102), and a first positioning hole (404) for plugging and mounting with the plug-in column (202) is provided on the anti-leakage device (4).

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