A thin-walled angular contact ball bearing special for industrial robots

Abstract

The present invention discloses a special thin-walled angular contact ball bearing for industrial robots, which relates to the technical field of bearings and includes: a bearing unit, comprising an outer ring, a rolling assembly disposed inside the outer ring, and an inner ring disposed at the bottom of the rolling assembly. When the bearing unit rotates during operation, frictional heat is generated due to the rotation of the outer ring and the interior by the rolling assembly, resulting in a temperature rise. The rotating sleeve and fan plate inside the heat dissipation assembly disrupt the temperature airflow, squeezing the heat between the heat conduction partition and the sealing ring, and then the heat is initially conducted and dissipated by the heat conduction ring. At the same time, the heat conduction rod and the heat conduction ring absorb and conduct heat. Meanwhile, the labyrinth design of the dust-proof assembly not only prevents dust from entering but also guides the temperature airflow to be discharged through the ventilation openings, achieving heat dissipation so that external cooling equipment is not required, and it does not impede the rotation of the bearing, effectively solving the problems of poor natural heat dissipation effect and complex liquid cooling heat dissipation system, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and particularly to a thin-walled angular contact ball bearing for industrial robots. Background Art

[0002] The thin-walled angular contact ball bearing of an industrial robot bears large combined axial and radial loads as well as impact loads. Moreover, with the development of industrial robots towards precision, high efficiency, and compactness, the thin-walled angular contact ball bearing for industrial robots must also possess precision, high speed, thin walls, and a long service life.

[0003] When the existing thin-walled angular contact ball bearings of industrial robots work under high intensity for a long time, the heat dissipation problem cannot be well solved. Currently, the natural heat dissipation effect is poor and the speed is slow, which easily leads to the bearing cracking due to high temperature. Although the liquid cooling heat dissipation has a better effect, it requires external equipment. The installation of internal pipes hinders rotation, and there are problems such as high cooling costs, complex systems, low reliability, easy corrosion, leakage, blockage, environmental restrictions, and easy entry of dust into the interior, which affect the bearing life and performance, and also increase the maintenance cost and failure risk. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned existing thin-walled angular contact ball bearings for industrial robots, the present invention is proposed.

[0005] Therefore, the present invention provides a thin-walled angular contact ball bearing for industrial robots, and its purpose is to solve the problems of poor natural heat dissipation effect, slow speed, easy cracking of the bearing due to high temperature, hindrance to rotation by liquid cooling heat dissipation, high cooling cost, complex system, low reliability, easy corrosion, leakage, blockage, environmental restrictions, easy entry of dust into the interior affecting the bearing life and performance, and also increasing the maintenance cost and failure risk.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a bearing unit, including an outer ring, a rolling assembly disposed inside the outer ring, and an inner ring disposed at the bottom of the rolling assembly;

[0007] A heat dissipation unit, including a heat dissipation assembly disposed on the rolling assembly;

[0008] A ventilation and dust-proof unit, including a sealing assembly disposed on the heat dissipation assembly, and a dust-proof assembly disposed on the sealing assembly, and the sealing assembly is connected to the inner ring;

[0009] The rolling assembly includes rolling balls rotatably disposed on the outer diameter of the inner ring, and a rolling ring disposed on the outer diameter of the rolling balls, and the rolling ring is rotatably connected to the outer ring;

[0010] The heat dissipation assembly includes heat conducting rods disposed on the rolling ring, a rotating sleeve rotatably disposed on the heat conducting rods, and fan plates disposed on the outer diameter of the rotating sleeve, and the fan plates cooperate with the rolling ring;

[0011] One end of the heat conduction rod is provided with a heat conduction ring. The inner diameter of the heat conduction ring is provided with heat conduction partitions, and the bottom of the heat conduction partitions is provided with a heat conduction ring, and the heat conduction ring is rotationally connected to the inner ring;

[0012] The sealing assembly includes a sealing ring arranged on the outer diameter of the heat conduction ring, a first sealing gasket arranged inside the sealing ring, and a second sealing gasket arranged inside the sealing ring, and the second sealing gasket cooperates with the heat conduction ring;

[0013] The dust-proof assembly includes a separator arranged at one end of the sealing ring, a partition board arranged inside the separator, and an inner board arranged inside the separator.

[0014] As a preferred scheme of the thin-walled angular contact ball bearing for industrial robots described in the present invention, wherein: a ventilation port is arranged inside the sealing ring, and the ventilation port is connected to the dust-proof assembly.

[0015] As a preferred scheme of the thin-walled angular contact ball bearing for industrial robots described in the present invention, wherein: a first ventilation groove is arranged inside the partition board, and the first ventilation groove cooperates with the ventilation port.

[0016] As a preferred scheme of the thin-walled angular contact ball bearing for industrial robots described in the present invention, wherein: a second ventilation groove is arranged at the bottom of the inner board, and the second ventilation groove cooperates with the first ventilation groove.

[0017] As a preferred scheme of the thin-walled angular contact ball bearing for industrial robots described in the present invention, wherein: the first ventilation groove on the surface of the partition board inside the separator cooperates with the second ventilation groove on the surface of the inner board, so that the air flow is discharged in an S shape.

[0018] The beneficial effects of the present invention: When the bearing unit rotates during operation, frictional heat is generated due to the rotation of the outer ring and the internal rolling components, resulting in a temperature increase. The rotating sleeve and fan plate inside the heat dissipation assembly disrupt the temperature air flow, squeezing the heat between the heat conduction partitions and the sealing ring, and then the heat is initially conducted and dissipated by the heat conduction ring. At the same time, the heat conduction rod and the heat conduction ring absorb and conduct the heat. At the same time, the labyrinth design of the dust-proof assembly not only prevents dust from entering, but also guides the temperature air flow to be discharged through the ventilation port, achieving heat dissipation without the need for external cooling equipment, without hindering the rotation of the bearing, effectively solving the problems of poor natural heat dissipation effect and complex liquid cooling heat dissipation system, improving the service life and working performance of the bearing, reducing the maintenance cost and failure risk, and enhancing the service life of the thin-walled angular contact ball bearing for industrial robots. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the thin-walled angular contact ball bearing dedicated for industrial robots of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the thin-walled angular contact ball bearing dedicated for industrial robots of the present invention.

[0022] Figure 3 For the thin-walled angular contact ball bearing dedicated for industrial robots of the present invention Figure 2 The enlarged schematic diagram at position A.

[0023] Figure 4 It is a schematic diagram of the sectional structure of the thin-walled angular contact ball bearing dedicated for industrial robots of the present invention.

[0024] Figure 5 For the thin-walled angular contact ball bearing dedicated for industrial robots of the present invention Figure 4 The enlarged schematic diagram at position B.

[0025] Figure 6 It is an exploded schematic diagram of the thin-walled angular contact ball bearing dedicated for industrial robots of the present invention.

[0026] Figure 7 It is an exploded sectional schematic diagram of the thin-walled angular contact ball bearing dedicated for industrial robots of the present invention.

[0027] Figure 8 For the thin-walled angular contact ball bearing dedicated for industrial robots of the present invention Figure 7 The enlarged schematic diagram at position C.

[0028] Explanation of reference numerals: 100, bearing unit; 101, outer ring; 102, rolling assembly; 1021, rolling ring; 1022, rolling ball; 103, inner ring; 200, heat dissipation unit; 201, heat dissipation assembly; 2011, heat conduction rod; 2012, rotating sleeve; 2013, fan plate; 2014, heat conduction ring; 2015, heat conduction sub-column; 2016, heat conduction ring; 300, ventilation and dust prevention unit; 301, sealing assembly; 3011, sealing ring; 3012, ventilation port; 3013, sealing gasket one; 3014, sealing gasket two; 302, dust prevention assembly; 3021, isolation member; 3022, baffle; 3023, ventilation groove one; 3024, inner plate; 3025, ventilation groove two. Detailed implementation manners

[0029] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0030] Example 1, referring to Figure 1 - Figure 2 , which is the first embodiment of the present invention, provides a special thin-walled angular contact ball bearing for industrial robots. This device includes: a bearing unit 100, a heat dissipation unit 200, and a ventilation and dust-proof unit 300.

[0031] Among them, the bearing unit 100 includes an outer ring 101, a rolling component 102 disposed inside the outer ring 101, and an inner ring 103 disposed at the bottom of the rolling component 102;

[0032] The heat dissipation unit 200 includes a heat dissipation component 201 disposed on the rolling component 102 and;

[0033] The ventilation and dust-proof unit 300 includes a sealing component 301 disposed on the heat dissipation component 201, and a dust-proof component 302 disposed on the sealing component 301. The sealing component 301 is connected to the inner ring 103. When the bearing unit 100 rotates during operation, the inner ring 103 rotates and moves along with the connected industrial robot. The inner ring 103 drives the internal rolling component 102 to start rotating for a long time between the inner ring 103 and the outer ring 101. As a result, a large amount of heat is generated due to friction inside the rolling component 102. And during the process of the rolling component 102 rotating along with the inner ring 103, the fan plate 2013 on the heat dissipation component 201 also starts to rotate due to the centrifugal force generated by the rotation of the rolling component 102. And during the continuous rotation of the fan plate 2013, it starts to disrupt the air flow generated inside the rolling component 102, and at the same time squeezes the disrupted high-temperature air flow to both sides, squeezing the high-temperature air flow generated by the rolling component 102 between the sealing component 301 and the heat dissipation component 201. Then, through the sealing component 301, the high-temperature air flow in the heat dissipation component 201 is squeezed and discharged, so as to enhance the heat dissipation effect inside the rolling component 102. At the same time, the dust-proof component 302 plays an auxiliary role in heat dissipation. Under the limitation of the S-shaped ventilation port of the dust-proof component 302, the high-temperature gas can be directly transported out, but the external dust cannot enter the inside of the rolling component 102, ensuring the smooth rotation inside the rolling component 102. And the heat dissipation component 201 can also absorb and conduct the heat inside the rolling component 102, and transport the heat to the outside and cooperate with the sealing component 301 for double-layer heat dissipation, achieving heat dissipation without the need for external cooling equipment, not hindering the rotation of the bearing, effectively solving problems such as poor natural heat dissipation effect and complex liquid cooling heat dissipation system, and improving the service life and working performance of the bearing.

[0034] During use, when the bearing unit 100 is working and rotating, the inner ring 103 rotates and moves along with the connected industrial robot. The inner ring 103 drives the internal rolling components 102 to start long-term rotation between the inner ring 103 and the outer ring 101. As a result, a large amount of heat begins to be generated inside the rolling components 102 due to friction. And during the process of the rolling components 102 rotating along with the inner ring 103, the fan plate 2013 on the heat dissipation component 201 also starts to rotate due to the centrifugal force generated by the rotation of the rolling components 102. And during the continuous rotation of the fan plate 2013, it begins to disrupt the airflow generated inside the rolling components 102. At the same time, it squeezes the disrupted high-temperature airflow to both sides, squeezing the high-temperature airflow generated by the rolling components 102 between the sealing component 301 and the heat dissipation component 201. Then, through the sealing component 301, the high-temperature airflow in the heat dissipation component 201 is squeezed and discharged, enhancing the heat dissipation effect inside the rolling components 102. At the same time, the dust-proof component 302 plays an auxiliary role in heat dissipation. Under the limitation of the S-shaped ventilation opening of the dust-proof component 302, the high-temperature gas can be directly discharged, but the external dust cannot enter the inside of the rolling components 102, ensuring the smooth rotation inside the rolling components 102. And the heat dissipation component 201 can also absorb and conduct the heat inside the rolling components 102, and transfer the heat to the outside and cooperate with the sealing component 301 for double-layer heat dissipation, achieving heat dissipation without the need for external cooling equipment, not hindering the rotation of the bearing, effectively solving problems such as poor natural heat dissipation effect and complex liquid cooling heat dissipation system, and improving the service life and working performance of the bearing.

[0035] Example 2, refer to Figure 1 - Figure 6, which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is as follows: The rolling component 102 includes rolling beads 1022 rotatably arranged on the outer diameter of the inner ring 103, and a rolling ring 1021 arranged on the outer diameter of the rolling beads 1022, and the rolling ring 1021 is rotatably connected to the outer ring 101. The heat dissipation component 201 includes heat conducting rods 2011 arranged on the rolling ring 1021, a rotating sleeve 2012 rotatably arranged on the heat conducting rods 2011, and fan plates 2013 arranged on the outer diameter of the rotating sleeve 2012, and the fan plates 2013 cooperate with the rolling ring 1021. One end of the heat conducting rod 2011 is provided with a heat conducting ring 2014, the inner diameter of the heat conducting ring 2014 is provided with heat conducting partitions 2015, the bottom of the heat conducting partitions 2015 is provided with a heat conducting ring 2016, and the heat conducting ring 2016 is rotatably connected to the inner ring 103. When the bearing unit 100 rotates during operation, the inner ring 103 rotates and moves along with the connected industrial robot. The inner ring 103 drives the internal rolling beads 1022 to rotate forward. At the same time, the rolling ring 1021 on the outer diameter of the rolling beads 1022 also rotates along with the rolling beads 1022. During the rotation of the rolling ring 1021, the heat conducting rods 2011, the rotating sleeve 2012 on the outer diameter of the heat conducting rods 2011, and the fan plates 2013 are driven by the centrifugal force generated by the rolling ring 1021 due to the rotation of the rolling beads 1022 and the rolling ring 1021. The rotating sleeve 2012 starts to drive the fan plates 2013 to rotate inside the inner ring 103 and the outer ring 101. And while the fan plates 2013 are rotating, the high-temperature airflow generated by the friction of the rolling beads 1022 between the inner ring 103 and the outer ring 101 is disturbed. At the same time, the fan plates 2013 squeeze the disturbed airflow to both sides of the rolling ring 1021, so as to squeeze the high-temperature airflow generated by the rolling beads 1022 through the heat conducting partitions 2015 and transport it between the sealing components 301. And with the cooperation of the sealing components 301, the high-temperature airflow starts to be transported to the outside for main heat dissipation treatment. At the same time, the heat conducting ring 2014 can also adsorb the heat generated by the rolling beads 1022, and then transfer it to the inside of the heat conducting partitions 2015 and the heat conducting ring 2016. And the heat conducting ring 2016 is connected to the external inner ring 103, so as to transport the heat to the outside through the heat conducting ring 2016 for secondary heat dissipation treatment. Through the cooperation of the heat conducting ring 2016 and the fan plates 2013, the heat generated by the friction of the rolling beads 1022 can be effectively dissipated.

[0036] During use, when the bearing unit 100 is working and rotating, the inner ring 103 rotates and moves along with the connected industrial robot. The inner ring 103 drives the internal rolling beads 1022 to rotate forward. At the same time, the rolling ring 1021 on the outer diameter of the rolling beads 1022 also rotates along with the rolling beads 1022. During the rotation of the rolling ring 1021, the heat conduction rod 2011, the rotating sleeve 2012 on the outer diameter of the heat conduction rod 2011, and the fan plate 2013 are driven by the centrifugal force generated by the rolling ring 1021 due to the rotation of the rolling beads 1022 and the rolling ring 1021. The rotating sleeve 2012 starts to drive the fan plate 2013 to rotate inside the inner ring 103 and the outer ring 101. And while the fan plate 2013 is rotating, it disturbs the high-temperature air flow generated by the friction of the rolling beads 1022 between the inner ring 103 and the outer ring 101. At the same time, the fan plate 2013 squeezes the disturbed air flow to both sides of the rolling ring 1021, so as to squeeze the high-temperature air flow generated by the rolling beads 1022 through the heat conduction partition 2015 and transport it between the sealing components 301. And with the cooperation of the sealing components 301, it starts to transport the high-temperature air flow to the outside for main heat dissipation treatment. At the same time, the heat conduction ring 2014 can also adsorb the heat generated by the rolling beads 1022, and then transfer it to the inside of the heat conduction partition 2015 and the heat conduction ring 2016. And the heat conduction ring 2016 is connected to the outer inner ring 103, so as to transport the heat to the outside through the heat conduction ring 2016 for secondary heat dissipation treatment. Through the cooperation of the heat conduction ring 2016 and the fan plate 2013, the heat generated by the friction of the rolling beads 1022 can be effectively dissipated.

[0037] The remaining structure is the same as that of Embodiment 1.

[0038] Embodiment 3, referring to Figure 1 - Figure 8, which is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is as follows: The sealing assembly 301 includes a sealing ring 3011 provided on the outer diameter of the heat conduction ring 2016, a first sealing gasket 3013 provided inside the sealing ring 3011, and a second sealing gasket 3014 provided inside the sealing ring 3011. The second sealing gasket 3014 cooperates with the heat conduction ring 2016. A ventilation port 3012 is provided inside the sealing ring 3011, and the ventilation port 3012 is connected to the dust-proof assembly 302. When the bearing unit 100 rotates during operation, dust-proofing of the rolling assembly 102 inside it is also particularly important. During the process of the heat dissipation assembly 201 effectively dissipating heat to the outside, the ventilation port 3012 on the sealing ring 3011 cooperates with the heat dissipation of the heat dissipation assembly 201 to ensure that the heat dissipation assembly 201 can transfer heat to the outside. At the same time, the first sealing gasket 3013 and the second sealing gasket 3014 inside the sealing ring 3011 also provide sealing protection for the internal heat dissipation assembly 201 and the rolling assembly 102, effectively preventing external dust from entering the inside of the inner ring 103 and the outer ring 101, which may affect the rotation of the rolling assembly 102 and cause damage.

[0039] Compared with Embodiment 2, further, the dust-proof assembly 302 includes an isolation member 3021 provided at one end of the sealing ring 3011, a partition plate 3022 provided inside the isolation member 3021, and an inner plate 3024 provided inside the isolation member 3021. A first ventilation groove 3023 is provided inside the partition plate 3022, and the first ventilation groove 3023 cooperates with the ventilation port 3012. A second ventilation groove 3025 is provided at the bottom of the inner plate 3024, and the second ventilation groove 3025 cooperates with the first ventilation groove 3023. The first ventilation groove 3023 on the surface of the partition plate 3022 inside the isolation member 3021 cooperates with the second ventilation groove 3025 on the surface of the inner plate 3024, so that the air flow is discharged in an S shape. When the heat dissipation assembly 201 dissipates heat to the outside, the high-temperature gas is transported to the inside of the isolation member 3021 through the second ventilation groove 3025 on the inner plate 3024, then moves upward, and then passes through the first ventilation groove 3023 on the partition plate 3022 again, and finally is discharged through the ventilation port 3012 on the sealing ring 3011. When the high-temperature gas passes through the second ventilation groove 3025 and the first ventilation groove 3023, an S-shaped route is formed, which can effectively discharge the gas. At the same time, the external dust will fall inside the isolation member 3021 when passing through the inside of the isolation member 3021, so that the dust cannot fall into the inside of the rolling assembly 102.

[0040] During use, when the bearing unit 100 is working and rotating, the dust prevention of the rolling components 102 inside it is also particularly important. During the process of the heat dissipation component 201 effectively dissipating heat to the outside, the ventilation openings 3012 on the sealing ring 3011 cooperate with the heat dissipation of the heat dissipation component 201 to ensure that the heat dissipation component 201 can transfer heat to the outside. At the same time, the sealing gasket one 3013 and the sealing gasket two 3014 inside the sealing ring 3011 also provide sealing protection for the internal heat dissipation component 201 and the rolling components 102, effectively preventing external dust from entering the inside of the inner ring 103 and the outer ring 101, which may affect the rotation of the rolling components 102 and cause damage. When the heat dissipation component 201 dissipates heat to the outside, the high-temperature gas is transported to the inside of the isolation member 3021 through the ventilation groove two 3025 on the inner plate 3024, then moves upward, passes through the ventilation groove one 3023 on the partition plate 3022 again, and finally is discharged through the ventilation opening 3012 on the sealing ring 3011. When the high-temperature gas passes through the ventilation groove two 3025 and the ventilation groove one 3023, it forms an S-shaped route, which can effectively discharge the gas. At the same time, the external dust will fall inside the isolation member 3021 when passing through the inside of the isolation member 3021, so that the dust cannot fall into the inside of the rolling components 102. The labyrinth design of the dust prevention component 302 not only prevents dust from entering but also guides the temperature airflow to be discharged through the ventilation opening, achieving heat dissipation without the need for external cooling equipment, not hindering the rotation of the bearing, effectively solving problems such as poor natural heat dissipation effect and complex liquid cooling heat dissipation system, improving the service life and working performance of the bearing, and reducing the maintenance cost and failure risk.

[0041] The remaining structures are the same as those of Embodiment 2.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A thin-walled angular contact ball bearing for industrial robots, characterized in that: Comprising: A bearing unit (100), including an outer ring (101), a rolling component (102) disposed inside the outer ring (101), and an inner ring (103) disposed at the bottom of the rolling component (102); A heat dissipation unit (200), including a heat dissipation component (201) disposed on the rolling component (102); A ventilation and dust-proof unit (300), including a sealing component (301) disposed on the heat dissipation component (201), and a dust-proof component (302) disposed on the sealing component (301), and the sealing component (301) is connected to the inner ring (103); The rolling component (102), including rolling beads (1022) rotatably disposed on the outer diameter of the inner ring (103), and a rolling ring (1021) disposed on the outer diameter of the rolling beads (1022), and the rolling ring (1021) is rotatably connected to the outer ring (101); The heat dissipation component (201), including heat conduction rods (2011) disposed on the rolling ring (1021), a rotating sleeve (2012) rotatably disposed on the heat conduction rods (2011), and fan plates (2013) disposed on the outer diameter of the rotating sleeve (2012), and the fan plates (2013) cooperate with the rolling ring (1021); One end of the heat conduction rod (2011) is provided with a heat conduction ring (2014), the inner diameter of the heat conduction ring (2014) is provided with heat conduction partitions (2015), the bottom of the heat conduction partitions (2015) is provided with a heat conduction ring (2016), and the heat conduction ring (2016) is rotatably connected to the inner ring (103); The sealing component (301), including a sealing ring (3011) disposed on the outer diameter of the heat conduction ring (2016), a first sealing gasket (3013) disposed inside the sealing ring (3011), and a second sealing gasket (3014) disposed inside the sealing ring (3011), and the second sealing gasket (3014) cooperates with the heat conduction ring (2016); The dust-proof component (302), including a partition member (3021) disposed at one end of the sealing ring (3011), a partition board (3022) disposed inside the partition member (3021), and an inner board (3024) disposed inside the partition member (3021).

2. The thin-walled angular contact ball bearing for industrial robots according to claim 1, wherein: A ventilation port (3012) is disposed inside the sealing ring (3011), and the ventilation port (3012) is connected to the dust-proof component (302).

3. The thin-walled angular contact ball bearing for industrial robots according to claim 2, characterized in that: A first ventilation groove (3023) is disposed inside the partition board (3022), and the first ventilation groove (3023) cooperates with the ventilation port (3012).

4. The thin-walled angular contact ball bearing for industrial robots according to claim 3, wherein: A second ventilation groove (3025) is disposed at the bottom of the inner board (3024), and the second ventilation groove (3025) cooperates with the first ventilation groove (3023).

5. The thin-walled angular contact ball bearing for industrial robots according to any one of claims 1-4, characterized in that: The first ventilation groove (3023) on the surface of the partition board (3022) inside the partition member (3021) cooperates with the second ventilation groove (3025) on the surface of the inner board (3024), so that the air flow is discharged in an S shape.

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