Background
The connecting sealing bearing is used as a core component of the joint of the industrial robot, and the sealing device and the precise structure are used for stably supporting the rotating shaft, so that friction loss of the kinematic pair is greatly reduced, and high-precision and flexible rotation of the joint is ensured. The basic structure of the bearing is similar to that of a common rolling bearing, and the bearing consists of an inner ring, an outer ring, rolling bodies, a retainer and a sealing element, wherein the sealing element is a technical key of the sealing bearing and is used for preventing lubricant from leaking and external impurities from invading through physical isolation.
The traditional sealing gasket adopts static sealing, is mostly annular or sheet-shaped, and forms a sealing surface by mounting precompression. However, the mode has obvious limitations that the elastic deformation range is limited, the complex working condition is difficult to adapt, and the compensation mechanism is lacking after continuous abrasion, so that the sealing gap cannot be dynamically adjusted. Under high-load and high-pollution scenes such as industrial automation, mines, chemical industry and the like, the defects are particularly remarkable, the sealing gasket is rapidly worn to cause elastic failure, so that the loss of the lubricant is accelerated, the transmission efficiency is reduced, the invasion of pollutants is further caused, the abrasion of abrasive particles of the bearing part is aggravated, and finally the movement precision and the stability of the robot joint are influenced.
Meanwhile, the sealing design of the sealing bearing aims at preventing the leakage of the lubricant and the entry of external impurities, the characteristic also limits the injection of the lubricant, and the original lubricant in the bearing is gradually consumed after long-term use due to the difficulty in injecting new lubricant, so that the lubricant cannot be timely supplemented, the friction among the rolling body, the inner ring, the outer ring, the retainer and other parts is increased, and the abrasion is increased. And the rolling bodies, the retainers and other parts in the bearing are closely arranged to form a complex space structure. The lubricating oil needs to reach all friction parts and passes through narrow channels and gaps, so that the filling difficulty is increased, uneven distribution of the lubricating oil is easy to cause, key parts cannot be effectively lubricated, contact points between the rolling bodies and the inner ring roller paths and the outer ring roller paths are high-load areas, if the lubricating oil cannot fully reach the parts, the surfaces of the rolling bodies are worn due to friction, fatigue stripping, wear grooves and other phenomena occur, the precision and the smoothness of the rolling bodies are reduced, and the bearing capacity and the rotation precision of the bearing are further affected.
For this purpose, a connecting seal bearing for robots is proposed.
Disclosure of Invention
The invention aims to provide a connecting sealing bearing for a robot, which solves the problems in the background technology.
The connecting sealing bearing for the robot comprises two sealing compensation units, wherein the sealing compensation units are used for performing self-adaptive compensation on sealing of the connecting sealing bearing for the robot, the bearing comprises a high-temperature bearing steel inner ring, a high-temperature bearing steel outer ring, two high-temperature bearing steel retainers, a plurality of rivets and a plurality of high-temperature bearing steel balls, the high-temperature bearing steel inner ring is positioned on the inner side of the high-temperature bearing steel outer ring, the plurality of high-temperature bearing steel balls are arranged between the high-temperature bearing steel inner ring and the high-temperature bearing steel outer ring and are separated by the two high-temperature bearing steel retainers, the two high-temperature bearing steel retainers are fixedly connected through a plurality of rivets which are arranged in an annular array, two ends of each rivet penetrate through the corresponding high-temperature bearing steel retainer, the sealing compensation units comprise a plurality of clamping blocks which are arranged in an annular array, the clamping blocks are fixedly connected to one ends of the rivets penetrating through the high-temperature bearing steel retainers, groove blocks are sleeved on the clamping blocks, and one ends of the groove blocks, which are far away from the clamping blocks, are fixedly connected with supporting tubes.
Further, the one end fixed intercommunication that the groove piece was kept away from to the stay tube has the liquid case, and one side fixedly connected with stainless steel ring that the stay tube was kept away from to the liquid case, respectively fixedly connected with stainless steel skeleton board in stainless steel ring both sides, respectively overlaps on two stainless steel skeleton boards and is equipped with a rubber sleeve, and one side that the liquid case was kept away from to the stainless steel ring is four stainless steel fagging of annular array fixedly connected with, respectively fixedly connected with rubber bandage in the both sides of every stainless steel fagging.
Further, be provided with lubricated subassembly on the stainless steel ring, lubricated subassembly includes the filling groove, and the filling groove is offered on the stainless steel ring, and the inside threaded connection of filling groove has a rubber apron, and one side fixedly connected with handle that the liquid case was kept away from to the rubber apron, and the stay tube is close to one side fixed intercommunication of groove piece and has two drip pipes.
Further, the two sealing compensation units are respectively arranged on the upper side and the lower side of the high-temperature bearing steel inner ring and the high-temperature bearing steel outer ring.
Further, the groove block is in interference fit with the clamping block, and the clamping block is in plug-in fit with the groove block.
Further, the two rubber sleeves are fixedly connected with the stainless steel skeleton plate on the same side.
Further, one side of the two rubber bandages far away from the stainless steel supporting plate extends to the bottom of the side face of the rubber sleeve on the same side, and the two rubber bandages are fixedly connected with the side face of the rubber sleeve on the same side.
Further, the support tube is hollow, and the liquid tank is hollow.
Further, the groove blocks are arranged between two adjacent high-temperature bearing steel balls.
Further, two drip pipes on the same supporting pipe extend towards two sides of the adjacent high-temperature bearing steel balls respectively at one end far away from the supporting pipe.
Compared with the prior art, the invention has the beneficial effects that:
When the sealing compensation unit faces complex working conditions, the rubber sleeve can realize the function of partial elastic expansion compensation after precompression deformation abrasion of the rubber sleeve by the self elasticity and the synergistic effect of the rubber bandage and the stainless steel skeleton plate, and the rubber sleeve can also realize secondary elastic deformation, has a larger elastic compensation range and avoids the condition of sealing failure caused by rapid abrasion of the sealing gasket.
Meanwhile, the sealing compensation unit optimizes the elastic compensation range of the sealing gasket, so that the connecting sealing bearing for the robot can continuously keep good sealing performance under severe scenes of complex working conditions, the loss of lubricant and the invasion of external pollutants are reduced, the negative influence of the severe scenes on the sealing gasket is effectively relieved, and the accuracy and the stability of the movement of each part of the robot are improved.
The problem of sealed bearing's sealed design has restricted the injection of lubricating oil through lubricating assembly has been solved, has provided a convenient lubricating oil injection passageway for the robot with connecting sealed bearing, this makes in the long-term operation in-process of connecting sealed bearing for the robot, when inside lubricating oil consumed gradually, can in time supplement, has guaranteed that the robot is in good lubrication state all the time with connecting sealed bearing, avoids the part wearing and tearing aggravation and the performance decline that lead to because of lubricating oil is not enough.
Meanwhile, lubricating oil is directly filled into the positions of raceway contact points between the high-temperature bearing steel balls and the high-temperature bearing steel inner ring and between the lubricating oil and the high-temperature bearing steel outer ring through the lubricating assembly, the problem that the lubricating oil is difficult to reach a high-load area in a traditional connecting sealing bearing for a robot is effectively solved by the accurate lubricating mode, the key parts can be fully lubricated, and the phenomena of abrasion, fatigue peeling and the like caused by insufficient lubrication are reduced.
Drawings
FIG. 1 is a schematic perspective view of the whole device of the present invention;
FIG. 2 is a schematic sectional view of the high temperature bearing steel inner ring, the high temperature bearing steel outer ring and the like;
FIG. 3 is an enlarged schematic view of the invention at A in FIG. 2;
FIG. 4 is an enlarged schematic view of the invention at B in FIG. 3;
FIG. 5 is a schematic view of the high temperature bearing steel outer ring, high temperature bearing steel retainer and other structure cut-away;
FIG. 6 is an enlarged schematic view of FIG. 5 at C in accordance with the present invention;
FIG. 7 is an enlarged schematic view of the invention at D in FIG. 6;
FIG. 8 is a schematic sectional view of the structure distribution position of the groove blocks, the support tubes and the like;
FIG. 9 is a schematic view of the structural distribution positions of the stainless steel stay plate, the rubber bandage and the like;
fig. 10 is an enlarged schematic view of fig. 9 at E in accordance with the present invention.
In the figure:
11. a high-temperature bearing steel inner ring; 12 parts of high-temperature bearing steel outer rings, 13 parts of high-temperature bearing steel retainers, 14 parts of rivets, 15 parts of high-temperature bearing steel balls;
the sealing compensation unit comprises a sealing compensation unit body 21, a clamping block, a sealing compensation unit 22, a groove block, a sealing compensation support tube 23, a support tube 24, a liquid tank 25, a stainless steel ring 26, a stainless steel skeleton plate 27, a rubber sleeve 28, a stainless steel supporting plate 29 and a rubber bandage;
the lubricating unit comprises a lubricating unit body 210, a filling groove 211, a rubber cover plate 212, a lifting handle 213 and a drip tube.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The invention provides an embodiment:
embodiment one:
Referring to fig. 1 to 10, a connecting seal bearing for a robot includes two seal compensation units for adaptively compensating for the sealing of the connecting seal bearing for a robot, the bearing including a high temperature bearing steel inner ring 11, a high temperature bearing steel outer ring 12, two high temperature bearing steel holders 13, a plurality of rivets 14, and a plurality of high temperature bearing steel balls 15.
The high temperature bearing steel inner ring 11, the high temperature bearing steel outer ring 12, the two high temperature bearing steel retainers 13, the plurality of rivets 14 and the plurality of high temperature bearing steel balls 15 are all of a known structure.
The high-temperature bearing steel inner ring 11 is positioned at the inner side of the high-temperature bearing steel outer ring 12, the high-temperature bearing steel inner ring 11 and the high-temperature bearing steel outer ring 12 are coaxially arranged, a gap exists between the high-temperature bearing steel inner ring 11 and the high-temperature bearing steel outer ring 12, the two high-temperature bearing steel retainers 13 are symmetrically distributed up and down and are mutually attached, a plurality of semicircular lantern rings are respectively arranged on the two high-temperature bearing steel retainers 13 in an annular array, the semicircular lantern rings of the upper high-temperature bearing steel retainer 13 and the lower high-temperature bearing steel retainer 13 form a complete circular lantern ring, a high-temperature bearing steel ball 15 is in clearance fit in each combined circular lantern ring, the plurality of high-temperature bearing steel balls 15 are separated between the high-temperature bearing steel inner ring 11 and the high-temperature bearing steel outer ring 12 by the two high-temperature bearing steel retainers 13, smooth rolling is guaranteed, the two high-temperature bearing steel retainers 13 are fixedly connected through a plurality of rivets 14 arranged in an annular array, and two ends of the rivets 14 respectively penetrate through the corresponding high-temperature bearing steel retainers 13.
The two seal compensation units are respectively arranged on the upper side and the lower side of the high-temperature bearing steel inner ring 11 and the high-temperature bearing steel outer ring 12, each seal compensation unit comprises a plurality of clamping blocks 21 which are arranged in an annular array, each clamping block 21 is fixedly connected with one end of each rivet 14 penetrating out of the high-temperature bearing steel retainer 13, each clamping block 21 is sleeved with a groove block 22, one end of each groove block 22, which is far away from each clamping block 21, is fixedly connected with a supporting tube 23, one end of each supporting tube 23, which is far away from each groove block 22, is fixedly communicated with a liquid tank 24, one side, which is far away from each supporting tube 23, of each liquid tank 24, is fixedly connected with a stainless steel ring 25, two sides of each stainless steel ring 25 are respectively fixedly connected with a stainless steel frame plate 26, each stainless steel frame plate 26 is sleeved with a rubber sleeve 27, and one side, which is far away from each liquid tank 24, of each stainless steel ring 25 is fixedly connected with four stainless steel supporting plates 28 in an annular array.
Referring to fig. 4, the groove block 22 is in interference fit with the clamping block 21, and the clamping block 21 is in plug-in fit with the groove block 22, so that the groove block 22 and structures such as a supporting tube 23, a liquid tank 24, a stainless steel ring 25 and the like arranged on the groove block 22 can be quickly and firmly installed on the high-temperature bearing steel retainer 13.
Referring to fig. 4 and 7, two rubber sleeves 27 are fixedly connected with the stainless steel skeleton plate 26 on the same side, one sides of the two rubber bandages 29 far away from the stainless steel supporting plate 28 extend towards the bottom of the side surfaces of the rubber sleeves 27 on the same side, and the two rubber bandages 29 are fixedly connected with the side surfaces of the rubber sleeves 27 on the same side.
It should be noted that in the state shown in fig. 7, that is, in the initial state, when the rubber sleeve 27 and the rubber bandage 29 are not worn, the rubber sleeve 27 and the stainless steel skeleton plate 26 on the same side are pulled upwards by the rubber bandage 29 to deform, at this time, the rubber bandage 29 is in a tight state, the stainless steel skeleton plate 26 and the rubber sleeve 27 are in an elastic deformation state, and as shown in fig. 10, a notch with the size matching with the rubber sleeve 29 is formed in the rubber sleeve 27, the rubber bandage 29 is embedded into the notch, so that the connecting part of the rubber bandage 29 and the rubber sleeve 27 is flush with the side surface of the rubber sleeve 27, and the side surfaces of the rubber sleeve 27 and the rubber bandage 29 form a plane, so that the rubber sleeve 27 and the rubber bandage 29 can receive the same friction effect.
It should be noted that, when the two rubber sleeves 27 are installed between the high temperature bearing steel inner ring 11 and the high temperature bearing steel outer ring 12, the two rubber sleeves 27 are already precompressed and deformed against the friction surfaces of the high temperature bearing steel inner ring 11 and the high temperature bearing steel outer ring 12, that is, the two rubber sleeves 27 have precompressed characteristics as the sealing gasket in the prior art, that is, the two rubber sleeves 27 have the function of partially elastically stretching and compensating after deformation and abrasion.
Referring to fig. 7 and 9, the structures such as the stainless steel ring 25 and the stainless steel supporting plate 28 are fixedly installed on the high-temperature bearing steel retainer 13 through the insertion interference fit of the clamping block 21 and the groove block 22, and the rubber sleeve 27 and the stainless steel skeleton plate 26 are pulled to deform upwards, so that the rubber sleeve 27 and the stainless steel skeleton plate 26 have a tendency to stretch downwards and return to a horizontal state, but are limited by the tightened rubber bandage 29, meanwhile, the rubber sleeve 27 and the rubber bandage 29 are subjected to equal friction effects due to the fact that the friction surfaces of the rubber sleeve 27 and the rubber bandage 29 are flush, and further, when the high-temperature bearing steel inner ring 11 and the high-temperature bearing steel outer ring 12 relatively rotate, the rubber sleeve 27 and the rubber bandage 29 are subjected to equal abrasion, the abrasion can lead to the abrasion surface to be damaged and thin, and further, as the rubber bandage 29 is only fixedly connected with the side surface of the rubber sleeve 27 when not worn, the rubber bandage 27 is weakened along with the abrasion of the friction surface, until the connection position of the rubber sleeve 27 and the rubber bandage 29 is completely worn, the rubber bandage 29 is no longer limited, the rubber sleeve 27 and the rubber bandage 29 is in a connection position of the rubber sleeve 27 and the rubber bandage 29 is not reset, and the rubber bandage 29 is reset, and the rubber bandage 27 and the rubber bandage 29 is prevented from being in a condition that the friction surface is in a reset state, and the high-temperature bearing steel skeleton is in a state, and the high-temperature bearing steel is in which the high-temperature bearing steel and the high-temperature bearing steel ring 12 is in a state, and the high-speed reset, and the friction situation is prevented.
Furthermore, in summary, the conventional gasket relies on precompression deformation during installation, the elastic deformation range is limited, and is difficult to adapt to the complex working condition with serious abrasion, and when the sealing compensation unit faces the complex working condition, the rubber sleeve 27 can realize secondary elastic deformation through the self elasticity and the synergistic effect of the rubber bandage 29 and the stainless steel skeleton plate 26, besides the function of partial elastic expansion compensation after the precompression deformation abrasion of the rubber sleeve 27, the sealing compensation unit has a larger elastic compensation range, and the condition that the gasket is rapidly abraded to cause sealing failure is avoided.
Meanwhile, the sealing compensation unit optimizes the elastic compensation range of the sealing gasket, so that the connecting sealing bearing for the robot can continuously keep good sealing performance under severe scenes of complex working conditions, the loss of lubricant and the invasion of external pollutants are reduced, the negative influence of the severe scenes on the sealing gasket is effectively relieved, and the accuracy and the stability of the movement of each part of the robot are improved.
In the second embodiment, referring to fig. 2 to 10, a lubrication assembly for filling lubricating oil into contact parts between the high-temperature bearing steel balls 15 and the high-temperature bearing steel inner ring 11 and between the stainless steel balls and the high-temperature bearing steel outer ring 12 is arranged on the stainless steel ring 25, the lubrication assembly comprises a filling groove 210, the filling groove 210 is arranged on the stainless steel ring 25, a rubber cover plate 211 is connected with the inside of the filling groove 210 in a threaded manner, a lifting handle 212 is fixedly connected to one side of the rubber cover plate 211 away from the liquid tank 24, and two drip pipes 213 are fixedly communicated with one side of the supporting pipe 23 close to the groove block 22.
Wherein, referring to fig. 4, the handle 212 is convenient for the user to grasp, and the user can unscrew the rubber cover 211 from the filling groove 210 through the handle 212, so that the user can fill the lubricant into the liquid tank 24 through the filling groove 210.
Wherein, referring to FIG. 4, the supporting tube 23 is hollow, the liquid tank 24 is hollow, the supporting tube 23 is used for dripping lubricating oil, and the liquid tank 24 is used for storing lubricating oil.
The support pipe 23 plays a role of guiding the circulation of the lubricating oil and also plays a role of supporting the seal compensation unit.
It should be added that, as shown in fig. 8, in combination with the above, a plurality of high temperature bearing steel balls 15 are provided between the high temperature bearing steel inner ring 11 and the high temperature bearing steel outer ring 12, and the plurality of high temperature bearing steel balls 15 are separated by two high temperature bearing steel holders 13, that is, groove blocks 22 are provided between two adjacent high temperature bearing steel balls 15.
Referring to fig. 3 and 4, two drip pipes 213 on the same support pipe 23 extend to two sides of the adjacent high temperature bearing steel ball 15 at the end far away from the support pipe 23, specifically, the end far away from the support pipe 23 of the two drip pipes 213 extends to the raceway contact points between the high temperature bearing steel ball 15 and the high temperature bearing steel inner ring 11 and the high temperature bearing steel outer ring 12.
In summary, the user can rotate the rubber cover 211 to take out the inside of the filling groove 210 through the handle 212, so that the user can fill lubricating oil into the liquid tank 24 through the filling groove 210, and after the completion, the rubber cover 211 is screwed into the inside of the filling groove 210 again, so that the inside of the liquid tank 24 is sealed, the lubricating oil is circulated to the supporting tubes 23 which are arranged in an annular array and communicated from the inside of the liquid tank 24 to the bottom, the lubricating oil circulated to the inside of the supporting tubes 23 circulates to the raceway contact points between the high-temperature bearing steel balls 15 and the high-temperature bearing steel inner rings 11 and the high-temperature bearing steel outer rings 12 through the two drip pipes 213, so that the lubricating oil is accurately filled in the raceway contact point positions between the high-temperature bearing steel balls 15 and the high-temperature bearing steel inner rings 11 and the raceway contact point positions between the high-temperature bearing steel balls 15 and the high-temperature bearing steel outer rings 12 are high-load areas, and the problem that the sealing design of the sealing bearings limits the injection of the lubricating oil and the lubricating oil is unevenly distributed and cannot effectively lubricate key parts can be solved.
Furthermore, on the whole, the problem of injection of lubricating oil is restricted through the sealed design of the sealed bearing of lubrication subassembly solution, provide a convenient lubricating oil injection passageway for the robot with connecting sealed bearing, this makes when the long-term operation in-process of connecting sealed bearing for the robot, when inside lubricating oil is consumed gradually, can in time supplement, guaranteed that the robot is in good lubrication state all the time with connecting sealed bearing, avoid the part wearing and tearing aggravation and the performance decline that lead to because of lubricating oil is not enough.
Meanwhile, lubricating oil is directly filled into the positions of raceway contact points between the high-temperature bearing steel balls 15 and the high-temperature bearing steel inner ring 11 and the high-temperature bearing steel outer ring 12 through the lubricating assembly, the problem that the lubricating oil in a traditional connecting sealing bearing for a robot is difficult to reach a high-load area is effectively solved by the accurate lubricating mode, the key parts can be fully lubricated, and phenomena of abrasion, fatigue peeling and the like caused by insufficient lubrication are reduced.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.