Bearing and pick-and-place arm with same

Abstract

The utility model discloses a bearing and a pick-and-place arm with the same. The bearing comprises an outer ring, an inner ring, a sealing ring and a crossed roller, the outer ring and the inner ring are installed together, a roller raceway is formed at the connecting part of the outer ring and the inner ring, the crossed roller is installed in the roller raceway, and the sealing ring is arranged on the crossed roller. The part, corresponding to a crossed roller, of the sealing ring is fixed in a gap at the joint of an inner ring and an outer ring of the bearing, the sealing ring is used for injecting lubricating oil into the crossed roller, and the sealing ring comprises a sealing main body, a sealing ring and a sealing ring, and the plurality of oil injection nozzles are one-way self-sealing oil injection nozzles, and are obliquely inserted and fixed in the sealing main body corresponding to the openings. Aiming at the pain point that the bearing cannot be comprehensively lubricated under the condition of a fixed rotating angle, the function of externally injecting lubricating oil is added on the premise that the original function of the sealing ring of the bearing is not damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of crossed roller bearings, in particular to a bearing and a pick-and-place arm having the bearing. Background Art

[0002] During the manufacturing process, a cassette filled with glass substrates is picked up and placed into the next processing equipment by a pick-and-place arm. The pick-and-place arm is composed of three arms and is a telescopic pick-and-place arm. Among them, a crossed roller bearing is an important component in the composition of the pick-and-place arm. Lubrication needs to be maintained inside the bearing. However, during long-term use, due to insufficient lubricant filling inside the bearing, part of the bearing undergoes dry wear, resulting in roller breakage and thus reducing the bearing life.

[0003] In response to this, lubricating oil is regularly provided inside the bearing. However, when the existing crossed roller bearings are used on the pick-and-place arm of a crane, the following defects exist: Since such crossed roller bearings have a single oil injection port, when lubricating oil is injected into the oil injection port, the lubricating oil can only lubricate the rollers within the rotation angle range of the pick-and-place arm. Taking one arm / three arms as an example, the working rotation angle is 0 to 115°; taking two arms as an example, the working rotation angle is 0 to 230°, resulting in the inability to lubricate the entire inside of the bearing. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a bearing and a pick-and-place arm having the bearing. The bearing has a sealing ring capable of injecting lubricating oil into the rollers. The sealing ring can increase the lubrication range and lubrication effect of the bearing, thereby solving the problems raised in the above background art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A bearing includes an outer ring, an inner ring, a sealing ring, and crossed rollers. The outer ring and the inner ring are installed together. A roller raceway is formed at the connection part of the outer ring and the inner ring. The crossed rollers are installed in the roller raceway. The part of the sealing ring corresponding to the crossed rollers is fixed in the gap at the connection of the inner ring and the outer ring of the bearing. The sealing ring includes: a sealing main body, on which a plurality of funnel-shaped openings are formed; and a plurality of oil injection nozzles, which are one-way self-sealing oil injection nozzles, and are obliquely inserted and fixed in the sealing main body corresponding to each of the openings. The oil injection nozzles communicate with the roller raceway, so that lubricating oil can enter the roller raceway through the oil injection nozzles.

[0007] A pick-and-place arm is used to pick and place a cassette filled with glass substrates into the next processing equipment. The pick-and-place arm includes at least two operating arms and bearings mounted on the operating arms. The bearing includes an outer ring, an inner ring, a sealing ring, and crossed rollers. The outer ring and the inner ring are mounted together. A roller raceway is formed at the connection part of the outer ring and the inner ring. The crossed rollers are mounted in the roller raceway. The sealing ring is fixed in the gap at the connection of the inner ring and the outer ring corresponding to the position of the crossed rollers. The sealing ring includes: a sealing body, on which a plurality of funnel-shaped openings are formed; and a plurality of oil injection nozzles, which are one-way self-sealing oil injection nozzles, and are inserted and fixed in the sealing body obliquely corresponding to each of the openings. The oil injection nozzles communicate with the roller raceway, so that lubricating oil can enter the roller raceway through the oil injection nozzles.

[0008] Compared with the prior art, the bearing and the pick-and-place arm with the bearing involved in the present invention have at least the following beneficial effects.

[0009] (1) Solve the problem that a single oil injection nozzle cannot lubricate the whole bearing under the working condition of the existing crossed roller bearing running at a specific angle; (2) After the whole bearing is lubricated, the service life of the bearing can be effectively extended, and problems such as dry wear of the rollers in the unlubricated area can be avoided; (3) Through the oil injection nozzles fixed and permanently retained on the sealing ring, the lubricating oil can be effectively introduced onto the rollers in the sealing ring, improving the use efficiency of the lubricating oil and not damaging the sealing ring. Description of the Drawings

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 It is a schematic diagram of the working state when the pick-and-place arm with the bearing of the present invention is in the retracted position.

[0012] Figure 2 is Figure 1 A schematic diagram of the working state when the pick-and-place arm shown is in the extended position.

[0013] Figure 3 It is a three-dimensional enlarged schematic diagram of the bearing involved in the present invention.

[0014] Figure 4 It is an enlarged schematic diagram of the structure of the sealing ring involved in the present invention.

[0015] Figure 5 is Figure 4 The sectional view of the sealing ring shown along line A-A.

[0016] Description of main component symbols

[0017] bearing 100 connector 17 sealing ring 10 sealing body 11 grease nipple 13 inner ring 101 outer ring 103 opening 105 channel opening 107 first side 112 second side 113 third side 115 fixing part 117 main body part 131 head 133 first mounting groove 1011 first screw hole 1030 second screw hole 1031 crossed roller 20 syringe 3 pick-and-place arm 200 operating arm 300 Specific implementation manners

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] Figure 1 and Figure 2 are schematic diagrams of the pick-and-place arm 200 according to the present utility model in a working state. The pick-and-place arm 200 is used to pick and place a cassette (not shown in the figure) filled with glass substrates into the next processing equipment. As Figure 1 and Figure 2 shown, the pick-and-place arm 200 includes at least two operating arms 300 and bearings 100 respectively installed at the connecting parts between the operating arms 300. In this embodiment, the bearing 100 is a non-drain cross roller bearing. In addition, the operating arms 300 of the pick-and-place arm 200 are in the shape of frog legs and can reach the extended position from the retracted position. The fixed part of the pick-and-place arm 200 is also provided with a bearing 100 and is rotatably connected to a bottom plate (not shown in the figure) through the bearing 100. The operating angle of the bearing 100 is the working rotation angle of the pick-and-place arm. Taking one arm / three arms of the pick-and-place arm as an example, the working rotation angle is 0 to 115°, and taking two arms of the pick-and-place arm as an example, the working rotation angle is 0 to 230°. Therefore, the operation of the bearing 100 is not a full 360° rotation, but works at a certain angle.

[0020] As Figure 3As shown, the bearing 100 involved in the present utility model includes an outer ring 101, an inner ring 103, a sealing ring 10, and crossed rollers 20. The outer ring 101 and the inner ring 103 are installed together, and the outer ring 101 and the inner ring 103 form a roller raceway 105 and an installation gap (not shown in the figure). The roller raceway 105 is located at the middle position between the inner wall of the outer ring 101 and the inner wall of the inner ring 103. The installation gap is formed between the top of the outer ring 101 and the top of the inner ring 103, that is, the installation gap is located above the roller raceway 105, and the roller raceway 105 communicates with the installation gap. The crossed rollers 20 are installed in the roller raceway 105. The sealing ring 10 is installed at the gap between the top of the outer ring 101 and the inner ring 103, that is, at the installation gap. The sealing ring 10 can seal the gap between the top of the outer ring 101 and the inner ring 103, and can inject lubricating oil into the crossed rollers 20 of the bearing 100. In this embodiment, an oil injection operation is performed on the sealing ring 10 through a matching syringe 3.

[0021] Specifically, the inner side wall of the outer ring 101 and the outer side wall of the inner ring 103 are oppositely arranged, and a roller raceway 105 is formed therebetween. A first installation groove 1011 is recessed at the inner side wall of the outer ring 101, and a second installation groove (not shown in the figure) is recessed at the outer side wall of the inner ring 103. The first installation groove 1011 communicates with the second installation groove, thereby forming the roller raceway 105. The roller raceway 105 is used to install the crossed rollers 20. An installation gap is formed between the top of the inner side wall of the outer ring 101 and the top of the outer side wall of the inner ring 103, and the installation gap communicates with the roller raceway 105. The sealing ring 10 is installed in the installation gap. The sealing ring 10 can prevent external dust, impurities, and liquid from entering the roller raceway 105, so as to avoid the influence of dust, impurities, and liquid on the rotation of the crossed rollers 20.

[0022] In addition, connection members 17 for connecting with other components are respectively provided on the upper side of the inner ring 103 and the lower side of the outer ring 101. A plurality of first screw holes 1030 are provided on the inner ring 103 along the circumferential direction, and a plurality of second screw holes 1031 are provided on the outer ring 101 along the circumferential direction. The connection members 17 on the upper side and the lower side are respectively fixed on the inner ring 103 and the outer ring 101 of the bearing 100 through the cooperation of screws (not shown in the figure) with the first screw holes 1030 and the second screw holes 1031.

[0023] The bearing 100 is made of iron or alloy material, and the crossed rollers 20 are fixed therein. In this embodiment, single-row cylindrical rollers are provided in the bearing 100. The single-row cylindrical roller bearing can bear radial loads and axial loads in a single direction. When the bearing bears radial loads, an axial component force will be generated. Therefore, when another bearing capable of bearing axial forces in the opposite direction is required for balance. After long-term use of the cylindrical roller bearing, due to the lack of lubricating oil, the rotational friction resistance of the cylindrical roller bearing becomes larger, resulting in a decrease in the rotational efficiency of the cylindrical roller bearing. Therefore, it is necessary to inject lubricating oil to lubricate the cylindrical rollers, reduce the frictional force when the cylindrical roller bearing rotates, reduce the rolling resistance of the cylindrical roller bearing, and improve the rotational efficiency of the cylindrical roller bearing.

[0024] As Figure 4 shown, the sealing ring 10 includes an elastic sealing body 11 and an oil injection nozzle 13. Please refer to Figure 5 together. Specifically, the cross-section of the sealing body 11 is triangular in shape, and it includes a first side surface 112, a second side surface 113, and a third side surface 115 that are connected in sequence. The first side surface 112 and the second side surface 113 together form a fixing portion 117. The fixing portion 117 is fixedly installed in the installation gap between the top of the inner side wall of the outer ring 101 and the top of the outer side wall of the inner ring 103, and the third side surface 115 is exposed in the installation gap. A plurality of funnel-shaped openings 105 are formed on the third side surface 115. A channel port 107 is formed corresponding to the opening 105 at the lower end of the fixing portion 117. The opening 105 is communicated with the channel port 107, and the channel port 107 is communicated with the roller raceway 105.

[0025] In this embodiment, the opening 105 is formed by obliquely penetrating the sealing body 11 from the third side surface 115. The channel port 107 is communicated with the installation gap formed between the top of the inner side wall of the outer ring 101 and the top of the outer side wall of the inner ring 103. Specifically, the channel port 107 penetrates the lower surface of the sealing ring 10 and is communicated with the roller raceway 105 thereunder, so that the lubricating oil injected into the sealing ring 10 via the oil injection nozzle 13 can flow to the crossed rollers 20 of the bearing 100 in the roller raceway 105. In this embodiment, sixteen openings 105 are formed in the sealing ring 10 along its circumferential direction. The sealing ring 10 is a thermoplastic resin, and the openings 105 are formed on the sealing ring 10 by a welding torch. The sealing body 11 is an elastic rubber sheet.

[0026] A small oil injection nozzle 13 is installed on the sealing ring 10 corresponding to each opening 105. The oil injection nozzle 13 is obliquely inserted into each opening 105 of the sealing ring 10 and communicates with the channel opening 107. In this embodiment, the oil injection nozzle 13 is a one-way oil injection nozzle. When installing the one-way oil injection nozzle 13 on the sealing body 11 of the sealing ring 10, the principle of thermal expansion and contraction of the sealing body 11 can be utilized, and glue or the like can be used to fix the oil injection nozzle 13 in each opening 105 of the sealing ring 10. That is, the oil injection nozzle 13 is fixed in the opening of the sealing body 11 through an adhesive.

[0027] In this embodiment, the oil injection nozzle 13 is in a "T" shape, including a main body portion 131 and a head portion 133 vertically connected to the main body portion 131. A through opening (not shown in the figure) is provided at the lower end of the main body portion 131, and the through opening communicates with the channel opening 107. The head portion 133 of the oil injection nozzle 13 leaks out from the surface of the sealing ring 10 and protrudes slightly upward. The oil injection nozzle 13 is used in cooperation with a syringe 3, and the material of the syringe 3 can be hardened plastic or the like. The head portion 133 of the oil injection nozzle 13 is made of elastic rubber material, so it has a self-sealing function. After the needle tip of the syringe 3 is pulled out from the head portion 133, the head portion 133 will automatically close the needle hole due to the resilience of the elastic rubber material. That is to say, the head portion is punctured by the needle tip of the syringe 3 filled with lubricating oil and is self-sealed through its own elasticity to close the needle hole penetrated by the needle tip. The main body portion 131 of the oil injection nozzle 13 is a hollow cylinder and can be made of hardened resin material for the lubricating oil injected therein to flow along its side wall. That is to say, the present utility model uses the method of injecting oil with a syringe to add lubricating oil to the inner cross rollers 20 to achieve comprehensive lubrication of the bearing 100.

[0028] When injecting oil using the sealing ring 10 of the present utility model, the needle tip of the syringe 3 can penetrate the oil injection nozzle 13, so that the lubricating oil passes through the main body portion 131 of the oil injection nozzle 13 and the channel opening 107 at its lower end and penetrates into the rollers of the bearing. After the oil injection is completed, the needle tip of the syringe 3 can be withdrawn from the oil injection nozzle 13. After the needle tip is withdrawn, the oil injection nozzle made of elastic rubber material will automatically close the needle hole due to its resilience, and the function of the sealing ring 10 is not damaged.

[0029] As a variant, the oil injection nozzle 13 can also be omitted. When injecting oil, the needle tip of the syringe 3 is directly inserted into the channel opening 107 at the lower end of the sealing ring 10 through the opening 105 for oil injection. In this case, the needle tip needs to be thick enough. Since the opening 105 is funnel-shaped and its upper opening is wider, there is a possibility of external leakage of the lubricating oil.

[0030] In summary, the oil-injectable sealing ring provided by the present utility model has at least the following beneficial effects.

[0031] (1) It solves the problem that a single oil injection nozzle cannot lubricate the entire bearing under the operating conditions of a crossed roller bearing rotating at a specific angle.

[0032] (2) After full-bearing lubrication, the service life of the bearing can be effectively extended, and problems such as dry wear of the rollers in the unlubricated area can be avoided.

[0033] (3) Through the oil injection nozzle 13 fixed and permanently retained on the sealing ring 10, the lubricating oil can be effectively introduced onto the rollers inside the sealing ring 10, improving the utilization efficiency of the lubricating oil and not damaging the sealing ring 10.

[0034] Obviously, the embodiments described above are only a part of the embodiments of the present application, rather than all of them. The accompanying drawings show the preferred embodiments of the present application, but do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structures directly or indirectly using the content of the specification and drawings of the present application in other related technical fields are equally within the scope of the patent protection of the present application.

Claims

1. A bearing, comprising an outer ring, an inner ring, a sealing ring and a cross roller, wherein the outer ring and the inner ring are mounted together, the connection between the outer ring and the inner ring forms a roller raceway, the cross roller is mounted in the roller raceway, and the sealing ring is fixed in the gap between the inner ring and the outer ring of the bearing at a position corresponding to the cross roller, characterized in that: The sealing ring comprises: A sealing body having a plurality of funnel-shaped openings; and A plurality of oiling nozzles, which are one-way self-sealing oiling nozzles, are obliquely inserted into and fixed in the sealing body corresponding to each of the openings. The oil injection nozzle is in communication with the roller raceway, so that lubricating oil can enter the roller raceway through the oil injection nozzle.

2. The bearing according to claim 1, characterized in that A channel opening is formed at the lower end of the sealing body corresponding to the opening, and the channel opening passes through the lower surface of the sealing ring and is communicated with the lower end of the oil injection nozzle and the roller raceway.

3. The bearing according to claim 2, characterized in that The oiling nozzle comprises a main body and a head connected vertically to the main body. The head portion protrudes from a surface of the sealing ring, and the main body portion is obliquely inserted into the opening of the sealing body.

4. The bearing according to claim 3, characterized in that The head is made of elastic rubber. The head is punctured by a needle of a syringe filled with lubricating oil, and is self-sealed by its own elasticity to close the needle hole penetrated by the needle.

5. The bearing according to claim 4, characterized in that The main body is made of hardened resin and is used to allow lubricating oil to flow along its side wall to the cross rollers of the bearing.

6. The bearing according to claim 5, characterized in that A through opening is provided at the lower end of the main body, and the through opening is communicated with the passage opening.

7. The bearing according to claim 1, characterized in that The oil filling nozzle is fixed in the opening of the sealing body by adhesive.

8. The bearing according to claim 1, characterized in that: The sealing body has a triangular cross-section, and includes a first side surface, a second side surface, and a third side surface that are sequentially connected, and the first side surface and the second side surface together form a fixing portion.

9. The bearing according to claim 8, characterized in that The fixing portion is installed in a gap between the top of the inner side wall of the outer ring and the top of the outer side wall of the inner ring, the third side surface is exposed to the gap, and the plurality of funnel-shaped openings are opened on the third side surface.

10. A pick-and-place arm, used for picking up and placing a cassette filled with glass substrates into a next processing device, the pick-and-place arm comprising at least two operating arms and bearings mounted on the operating arms, characterized in that: The bearing is the bearing according to any one of claims 1 to 9.

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