Ultra-thin crossed roller bearing structure

Abstract

The invention relates to the technical field of bearings, in particular to an ultra-thin crossed roller bearing structure which comprises a bearing inner ring, a bearing outer ring and rollers, and the bearing inner ring and the bearing outer ring are coaxially and rotatably arranged; the multiple rollers are located between the bearing inner ring and the bearing outer ring, the rollers are cylindrical, and the axes of every two adjacent rollers are perpendicular to each other; an isolation block is arranged between every two adjacent rollers, each isolation block is a cube block or a cuboid block, the outer surface of each isolation block is provided with two contact surfaces which are opposite to each other and arranged in parallel, each contact surface is square, each contact surface is provided with two cylindrical grooves, the axes of the two cylindrical grooves are perpendicular to each other and intersect with each other, and the axes of the two cylindrical grooves are perpendicular to each other. The cylindrical grooves are used for being attached to the peripheral faces of the rollers, and the installation efficiency of the ultra-thin crossed roller bearing structure can be improved.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to an ultra-thin crossed roller bearing structure. Background Technology

[0002] Crossed roller bearings are high-precision bearings in which cylindrical or tapered rollers are arranged at 90° intervals inside the bearing. They can withstand radial and axial loads simultaneously and have the characteristics of high rigidity, high rotational accuracy, and compact structure, thus they are widely used in fields such as robotics and precision machine tools.

[0003] For example, patent document CN221347598U discloses a high-life crossed roller bearing, including a rolling support assembly. The rolling support assembly includes an inner bearing ring and an outer bearing ring, with a plurality of rollers rolling between the inner and outer bearing rings, and a spacer block between each adjacent pair of rollers. Because the circular grooves on the two opposite sides of the spacer block are perpendicular to each other, they must be installed in one direction, which makes the assembly of the crossed roller bearing inconvenient and affects the installation efficiency of the crossed roller bearing. Summary of the Invention

[0004] Therefore, it is necessary to provide an ultra-thin cross roller bearing structure to address the technical problem of low installation efficiency of the spacer block in current cross roller bearings.

[0005] The above objectives are achieved through the following technical solutions: An ultra-thin crossed roller bearing structure includes an inner bearing ring, an outer bearing ring, and rollers. The inner and outer bearing rings are coaxially rotatable. Multiple rollers are provided between the inner and outer bearing rings. Each roller is cylindrical, and the axes of adjacent rollers are perpendicular to each other. A spacer block, which is a cube or cuboid, is provided between adjacent rollers. The outer surface of the spacer block has two opposing and parallel contact surfaces, which are square. Each contact surface has two cylindrical grooves, whose axes are perpendicular to each other and intersect. The cylindrical grooves are used to fit against the outer circumferential surface of the roller.

[0006] Furthermore, a raceway is formed between the inner and outer rings of the bearing. The raceway is annular and coaxial with the inner ring. The roller is located in the raceway and can slide along it. The raceway is filled with lubricating oil. The two contact surfaces are divided into a first contact surface and a second contact surface, which are distributed sequentially in the front-to-back direction along the extension direction of the raceway. The isolation block is divided into a front half and a rear half in the front-to-back direction. The first contact surface is located on the front half, and the second contact surface is located on the rear half. The front half of the isolation block has a first oil guiding channel, and the rear half of the isolation block has a second oil guiding channel. When the roller pushes the isolation block forward in the raceway, the second oil guiding channel can collect the lubricating oil in the raceway and guide it to the second contact surface. When the roller pushes the isolation block backward in the raceway, the first oil guiding channel can collect the lubricating oil in the raceway and guide it to the first contact surface.

[0007] Furthermore, the outer surface of the isolation block also has four oil-guiding sides. The front half of each oil-guiding side is provided with a first oil inlet hole. The interior of the front half of the isolation block is provided with a first oil storage cavity. The first contact surface is provided with a first oil outlet hole. The first oil inlet hole is connected to the first oil outlet hole through the first oil storage cavity to form a first oil guiding channel. The rear half of each oil-guiding side is provided with a second oil inlet hole. The interior of the rear half of the isolation block is provided with a second oil storage cavity. The second contact surface is provided with a second oil outlet hole. The second oil inlet hole is connected to the second oil outlet hole through the second oil storage cavity to form a second oil guiding channel.

[0008] Furthermore, each of the oil guiding sides is provided with a first guide plate at the position corresponding to the first oil inlet hole. The first guide plate is used to guide the lubricating oil in the raceway into the first oil inlet hole, and the first guide plate is inclined relative to the oil guiding side. Each of the oil guiding sides is provided with a second guide plate at the position corresponding to the second oil inlet hole. The second guide plate is used to guide the lubricating oil in the raceway into the second oil inlet hole, and the second guide plate is inclined relative to the oil guiding side. The first guide plate and the second guide plate are in one-to-one correspondence, and both the first guide plate and the second guide plate extend along a first direction, which is perpendicular to the front-back direction. The end of the first guide plate away from the oil guiding side faces the second contact surface, and the end of the second guide plate away from the oil guiding side faces the first contact surface.

[0009] Furthermore, each of the oil-guiding sides is provided with a first mounting groove on the front half, the first guide plate is slidably disposed in the first mounting groove and extends out of the first mounting groove, the first mounting groove is also provided with a first elastic piece, the first elastic piece is connected to the first guide plate, and when the lubricating oil pushes the first guide plate, the first elastic piece can change the length of the first guide plate extending out of the first mounting groove; each of the oil-guiding sides is also provided with a second mounting groove, the second guide plate is slidably disposed in the second mounting groove and extends out of the second mounting groove, the second mounting groove is also provided with a second elastic piece, the second elastic piece is connected to the second guide plate, and when the lubricating oil pushes the second guide plate, the second elastic piece can change the length of the second guide plate extending out of the second mounting groove.

[0010] Furthermore, both the first and second elastic sheets are V-shaped.

[0011] Furthermore, the first oil outlet is provided in two rows, with the two rows of first oil outlets distributed along the axes of the two cylindrical grooves on the first contact surface, and each row of first oil outlets is provided with at least six; the second oil outlet is provided in two rows, with the two rows of second oil outlets distributed along the axes of the two cylindrical grooves on the second contact surface, and each row of second oil outlets is provided with at least six.

[0012] Furthermore, a transition surface is formed at the connection between two adjacent oil guiding sides. A third oil outlet hole is provided on the front half of each transition surface, and a fourth oil outlet hole is provided on the rear half of each transition surface. A third oil inlet hole is provided on the front half of each oil guiding side, and a fourth oil inlet hole is provided on the rear half of each oil guiding side. Each of the third oil inlets is connected to a third oil outlet hole on one of the transition surfaces connected to the opposite oil guiding side to form a third oil guiding channel. Each of the fourth oil inlets is connected to a fourth oil outlet hole on one of the transition surfaces connected to the opposite oil guiding side to form a fourth oil guiding channel. The third oil guiding channel and the fourth oil guiding channel correspond one-to-one and are arranged in parallel.

[0013] Furthermore, the third oil inlet hole corresponds one-to-one with the first oil inlet hole, and the straight line between the first oil inlet hole and the third oil inlet hole is parallel to the first guide plate. The fourth oil inlet hole corresponds one-to-one with the second oil inlet hole, and the straight line between the second oil inlet hole and the fourth oil inlet hole is parallel to the second guide plate.

[0014] Furthermore, the bearing outer ring is provided with a placement groove, which extends radially along the bearing outer ring and communicates with the interior of the raceway. The placement groove is used to place rollers and spacers in the raceway. A plug is detachably installed in the placement groove, and the plug can seal the raceway.

[0015] The beneficial effects of this invention are: The ultra-thin crossed roller bearing structure provided by the present invention, firstly, allows the contact surface to simultaneously conform to rollers in two installation directions, so that either of the two contact surfaces can face the rollers when installing the spacer block, without having to install the spacer block in only one direction, thereby improving the installation efficiency of the ultra-thin crossed roller bearing structure.

[0016] Secondly, when the ultra-thin crossed roller bearing structure is in operation, if the roller pushes the spacer block forward, the second contact surface of the spacer block will not easily come into contact with lubricating oil because it is located at the rear. The lubricating oil in the raceway is collected through the second oil guide channel and guided to the second contact surface, which can reduce the motion resistance between the second contact surface and the roller. Similarly, if the roller pushes the spacer block backward, the first contact surface in the spacer block will not easily come into contact with lubricating oil. The lubricating oil in the raceway is collected through the first oil guide channel and guided to the first contact surface, which can reduce the motion resistance between the first contact surface and the roller. This can prevent dry friction, thereby reducing the wear of the ultra-thin crossed roller bearing structure and extending its service life.

[0017] Third, when the ultra-thin crossed roller bearing structure is laid flat and rotated, the lubricating oil in the raceway is usually located at the bottom due to gravity. The lubricating oil at the bottom of the isolation block can be transported to the top of the isolation block through the third and fourth oil guide channels, thereby reducing the motion resistance between the top of the isolation block and the roller, and further reducing the wear of the ultra-thin crossed roller bearing structure and extending its service life. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an ultra-thin crossed roller bearing structure provided in an embodiment of the present invention; Figure 2 This is a side view schematic diagram of an ultra-thin crossed roller bearing structure provided in an embodiment of the present invention; Figure 3 An exploded view of an ultra-thin crossed roller bearing structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the isolation block in an ultra-thin crossed roller bearing structure provided in an embodiment of the present invention; Figure 5 A side view of the spacer block in an ultra-thin crossed roller bearing structure provided in an embodiment of the present invention. Figure 1 ; Figure 6 for Figure 5 Sectional view of AA; Figure 7 for Figure 6 Enlarged view of the structure at point X; Figure 8This is a schematic diagram of the internal structure of the isolation block in an ultra-thin crossed roller bearing structure provided in an embodiment of the present invention; Figure 9 A side view of the spacer block in an ultra-thin crossed roller bearing structure provided in an embodiment of the present invention. Figure 2 ; Figure 10 for Figure 9 BB section view; Figure 11 This is a schematic diagram of the isolation block in an ultra-thin crossed roller bearing structure provided in another embodiment of the present invention.

[0019] in: 110. Bearing outer ring; 112. Tapered pin; 113. Plug; 114. First groove; 120. Bearing inner ring; 121. Second groove; 130. Roller; 140. Spacer block; 141. First guide plate; 142. First elastic sheet; 143. First oil guide channel; 144. First oil reservoir; 145. First oil outlet; 146. First contact surface; 147. Fourth oil inlet; 148. Fourth oil outlet; 149. Second oil inlet; 150. Third oil outlet; 151. Second contact surface; 152. First oil inlet; 153. Second oil outlet; 154. Second oil reservoir; 155. Second oil guide channel; 156. Third oil inlet; 157. Second guide plate; 1411. Third guide plate; 1571. Fourth guide plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 1 to 10 As shown, an embodiment of the present invention provides an ultra-thin crossed roller bearing structure, including an inner bearing ring 120, an outer bearing ring 110, and rollers 130. The inner bearing ring 120 and the outer bearing ring 110 are coaxially rotatable. Multiple rollers 130 are provided and located between the inner bearing ring 120 and the outer bearing ring 110. Each roller 130 is cylindrical, and the axes of adjacent rollers 130 are perpendicular to each other. A spacer block 140 is provided between adjacent rollers 130. The spacer block 140 is a cube or cuboid block, and its outer surface has two opposing and parallel contact surfaces. Each contact surface is square, and each contact surface has two cylindrical grooves. The axes of the two cylindrical grooves are perpendicular to each other and intersect. The cylindrical grooves are used to fit against the outer circumferential surface of the rollers 130.

[0024] The rollers 130 are made of high-carbon chromium bearing steel, and the axis of each roller 130 is at 45° to the axis of the inner ring 120 and the outer ring 110 of the bearing.

[0025] In this embodiment, the thickness of the bearing outer ring 110 is 8.5 mm. This design makes the bearing outer ring 110 an ultra-thin structure, with a thickness not exceeding 9 mm, which greatly reduces the overall thickness and weight of the bearing, making it suitable for scenarios with strict limitations on installation space.

[0026] This invention enables the contact surface to simultaneously engage with the rollers 130 in two different mounting directions, allowing either of the two contact surfaces to face the rollers 130 during the installation of the spacer block 140. This eliminates the need for the spacer block 140 to be installed in only one direction, thereby improving the installation efficiency of the ultra-thin crossed roller bearing structure.

[0027] Furthermore, a raceway is formed between the inner ring 120 and the outer ring 110 of the bearing. The raceway is annular and coaxial with the inner ring 120. The roller 130 is located in the raceway and can slide along the raceway. The raceway is filled with lubricating oil.

[0028] Specifically, the inner ring 120 of the bearing is provided with a second groove 121, and the outer ring 110 of the bearing is provided with a first groove 114. The first groove 114 and the second groove 121 are joined to form the raceway. The inner surface of the raceway is hardened to a hardness of HRC 61-65, which can improve its wear resistance and fatigue strength, and further extend the service life of the ultra-thin crossed roller bearing structure.

[0029] The two contact surfaces are a first contact surface 146 and a second contact surface 151. The first contact surface 146 and the second contact surface 151 are distributed sequentially in the front-to-back direction along the extension direction of the raceway. The isolation block 140 is divided into a front half and a rear half in the front-to-back direction. The first contact surface 146 is located on the front half and the second contact surface 151 is located on the rear half. The front half of the isolation block 140 is provided with a first oil guiding channel 143, and the rear half of the isolation block 140 is provided with a second oil guiding channel 155. When the roller 130 pushes the isolation block 140 to slide forward in the raceway, the second oil guiding channel 155 can collect the lubricating oil in the raceway and guide it to the second contact surface 151. When the roller 130 pushes the isolation block 140 to slide backward in the raceway, the first oil guiding channel 143 can collect the lubricating oil in the raceway and guide it to the first contact surface 146.

[0030] In the operation of the ultra-thin crossed roller bearing structure, if the roller 130 pushes the spacer block 140 to slide forward, the second contact surface 151 of the spacer block 140, being located at the rear, is less likely to come into contact with lubricating oil. The lubricating oil in the raceway is collected through the second oil guide channel 155 and guided to the second contact surface 151, which can reduce the motion resistance between the second contact surface 151 and the roller 130. Similarly, if the roller 130 pushes the spacer block 140 to slide backward, the first contact surface 146 in the spacer block 140 is less likely to come into contact with lubricating oil. The lubricating oil in the raceway is collected through the first oil guide channel 143 and guided to the first contact surface 146, which can reduce the motion resistance between the first contact surface 146 and the roller 130. This can prevent dry friction, thereby reducing the wear of the ultra-thin crossed roller bearing structure and extending its service life.

[0031] Furthermore, the outer surface of the isolation block 140 also has four oil-guiding side surfaces. The front half of each oil-guiding side surface is provided with a first oil inlet hole 152. The interior of the front half of the isolation block 140 is provided with a first oil storage cavity 144. The first contact surface 146 is provided with a first oil outlet hole 145. The first oil inlet hole 152 is connected to the first oil outlet hole 145 through the first oil storage cavity 144 to form a first oil guiding channel 143. The rear half of each oil-guiding side surface is provided with a second oil inlet hole 149. The interior of the rear half of the isolation block 140 is provided with a second oil storage cavity 154. The second contact surface 151 is provided with a second oil outlet hole 153. The second oil inlet hole 149 is connected to the second oil outlet hole 153 through the second oil storage cavity 154 to form a second oil guiding channel 155.

[0032] In this way, the front half of the isolation block 140 lubricates the first contact surface 146, and the rear half of the isolation block 140 lubricates the second contact surface 151, which simplifies the structure of the first oil guide channel 143 and the second oil guide channel 155 and makes the isolation block 140 easier to process.

[0033] Furthermore, each of the oil guiding sides is provided with a first guide plate 141 at a position corresponding to the first oil inlet hole 152. The first guide plate 141 is used to guide the lubricating oil in the raceway into the first oil inlet hole 152. The first guide plate 141 is inclined relative to the oil guiding side. Each of the oil guiding sides is provided with a second guide plate 157 at a position corresponding to the second oil inlet hole 149. The second guide plate 157 is used to guide the lubricating oil in the raceway into the second oil inlet hole 149. The second guide plate 157 is inclined relative to the oil guiding side. The first guide plate 141 and the second guide plate 157 correspond one-to-one. Both the first guide plate 141 and the second guide plate 157 extend along a first direction, which is perpendicular to the front-back direction. The end of the first guide plate 141 away from the oil guiding side faces the second contact surface 151, and the end of the second guide plate 157 away from the oil guiding side faces the first contact surface 146.

[0034] Both the first guide plate 141 and the second guide plate 157 are flat plates, and the first guide plate 141 and the second guide plate 157 are inclined so that the first guide plate 141 and the second guide plate 157 can more easily collect the lubricating oil in the raceway.

[0035] Furthermore, each of the oil-guiding sides is provided with a first mounting groove on the front half, and the first guide plate 141 is slidably disposed in the first mounting groove and extends out of the first mounting groove. The first mounting groove is also provided with a first elastic piece 142, which is connected to the first guide plate 141. When the lubricating oil pushes the first guide plate 141, the first elastic piece 142 can change the length of the first guide plate 141 extending out of the first mounting groove. Each of the oil-guiding sides is also provided with a second mounting groove, and the second guide plate 157 is slidably disposed in the second mounting groove and extends out of the second mounting groove. The second mounting groove is also provided with a second elastic piece, which is connected to the second guide plate 157. When the lubricating oil pushes the second guide plate 157, the second elastic piece can change the length of the second guide plate 157 extending out of the second mounting groove.

[0036] When the roller 130 pushes the spacer block 140 forward, the lubricating oil in the raceway pushes the second guide plate 157, thereby pulling the second elastic sheet to extend. The length of the second guide plate 157 extending from the second mounting groove increases, allowing it to collect more lubricating oil. At this time, the first elastic sheet 142 is in a contracted state, and the extension length of the first guide plate 141 remains unchanged.

[0037] When the roller 130 pushes the spacer block 140 backward, the lubricating oil in the raceway pushes the first guide plate 141, thereby pulling the first elastic sheet 142 to extend. As a result, the length of the first guide plate 141 extending from the first mounting groove increases, allowing it to collect more lubricating oil. At this time, the second elastic sheet is in a contracted state, and the extension length of the second guide plate 157 remains unchanged.

[0038] Furthermore, both the first elastic sheet 142 and the second elastic sheet are V-shaped. This structure is simple and easy to manufacture.

[0039] Furthermore, the first oil outlet hole 145 is provided in two rows, and the two rows of first oil outlet holes 145 are respectively distributed along the axis of the two cylindrical grooves on the first contact surface 146, with at least six first oil outlet holes 145 in each row; the second oil outlet hole 153 is provided in two rows, and the two rows of second oil outlet holes 153 are respectively distributed along the axis of the two cylindrical grooves on the second contact surface 151, with at least six second oil outlet holes 153 in each row.

[0040] This allows the lubricating oil to reach the contact area between the roller 130 and the spacer block 140, improving the utilization rate of the lubricating oil.

[0041] Furthermore, a transition surface is formed at the connection between two adjacent oil guiding sides. A third oil outlet hole 150 is provided on the front half of each transition surface, and a fourth oil outlet hole 148 is provided on the rear half of each transition surface. A third oil inlet hole 156 is provided on the front half of each oil guiding side, and a fourth oil inlet hole 147 is provided on the rear half of each oil guiding side. Each third oil inlet hole 156 is connected to a third oil outlet hole 150 on one of the transition surfaces connected to the opposite oil guiding side to form a third oil guiding channel. Each fourth oil inlet hole 147 is connected to a fourth oil outlet hole 148 on one of the transition surfaces connected to the opposite oil guiding side to form a fourth oil guiding channel. The third oil guiding channel and the fourth oil guiding channel correspond one-to-one and are arranged in parallel.

[0042] Specifically, the lengths of the third oil guide channels and the fourth oil guide channels are all the same. Since there are two transition surfaces connected to the oil guide side opposite the third oil inlet 156, the third oil inlet 156 can be connected to the third oil outlet 150 on either of the transition surfaces.

[0043] Each of the first oil inlet hole 152, the second oil inlet hole 149, the third oil inlet hole 156 and the fourth oil inlet hole 147 on each oil guide side is provided with only one, and each of the third oil outlet hole 150 and the fourth oil outlet hole 148 on each transition surface is provided with only one.

[0044] In this embodiment, the third oil inlet hole 156 and the fourth oil inlet hole 147 are both eccentrically positioned on the guide side, resulting in different distances between the third oil inlet hole 156, the fourth oil inlet hole 147 and the two transition surfaces on the opposite guide side. For ease of processing, all four third oil inlet holes 156 and the fourth oil inlet hole 147 can be connected to the third oil outlet hole 150 and the fourth oil outlet hole 148 on the transition surfaces on the opposite guide side that are farther apart, or all four third oil inlet holes 156 and the fourth oil inlet hole 147 can be connected to the third oil outlet hole 150 and the fourth oil outlet hole 148 on the transition surfaces on the opposite guide side that are closer together.

[0045] When the ultra-thin crossed roller bearing structure is laid flat and rotated (i.e., the axis of the ultra-thin crossed roller bearing structure is in the vertical direction), the lubricating oil in the raceway is usually located at the bottom due to gravity. The lubricating oil at the bottom of the isolation block 140 can be transported to the top of the isolation block 140 through the third and fourth oil guide channels, thereby reducing the motion resistance between the top of the isolation block 140 and the roller 130, and further reducing the wear of the ultra-thin crossed roller bearing structure and extending its service life.

[0046] Furthermore, the third oil inlet hole 156 corresponds one-to-one with the first oil inlet hole 152, and the straight line between the first oil inlet hole 152 and the third oil inlet hole 156 is parallel to the first guide plate 141. The fourth oil inlet hole 147 corresponds one-to-one with the second oil inlet hole 149, and the straight line between the second oil inlet hole 149 and the fourth oil inlet hole 147 is parallel to the second guide plate 157.

[0047] In this way, the first guide plate 141 can simultaneously guide lubricating oil into the first oil inlet 152 and the third oil inlet 156, and the second guide plate 157 can simultaneously guide lubricating oil into the second oil inlet 149 and the fourth oil inlet 147.

[0048] Furthermore, the bearing outer ring 110 is provided with a placement groove, which extends radially along the bearing outer ring 110 and communicates with the interior of the raceway. The placement groove is used to place the roller 130 and the spacer block 140 into the raceway. A plug 113 is detachably installed in the placement groove, which can close the raceway.

[0049] The placement slot facilitates the placement of the roller 130 and the spacer block 140 into the enclosed raceway.

[0050] The plug 113 is made of PA66 engineering plastic. The plug 113 is interference-fitted onto the outer ring 110 of the bearing by two tapered pins 112, which are made of high-strength alloy structural steel.

[0051] Based on the above embodiments, the usage principle and working process of the present invention are as follows: During assembly, the ultra-thin crossed roller bearing structure is assembled by placing the rollers 130 in a crossed arrangement in the raceway between the inner ring 120 and the outer ring 110 of the bearing, installing a spacer 140 between two adjacent rollers 130, inserting the plug 113, and fixing the plug 113 to the outer ring 110 of the bearing with two tapered pins 112 to complete the assembly.

[0052] Then the ultra-thin crossed roller bearing structure is rotated. If the roller 130 pushes the spacer block 140 to slide forward, the lubricating oil in the raceway will push the second guide plate 157, thereby pulling the second elastic sheet to extend. Then the length of the second guide plate 157 extending from the second mounting groove becomes longer, so that more lubricating oil can be collected and delivered to the second oil outlet hole 153 on the second contact surface 151 through the second oil storage cavity 154, thereby achieving lubrication of the second contact surface 151.

[0053] If the roller 130 pushes the isolation block 140 to slide backward, the lubricating oil in the raceway will push the first guide plate 141, thereby pulling the first elastic sheet 142 to extend. Then the length of the first guide plate 141 extending from the first mounting groove becomes longer, so that more lubricating oil can be collected and delivered to the first oil outlet 145 on the first contact surface 146 through the first oil storage cavity 144, thereby achieving lubrication of the first contact surface 146.

[0054] If the ultra-thin crossed roller bearing structure is laid flat and rotated, the third and fourth oil guide channels allow the lubricating oil at the bottom of the isolation block 140 to be transported to the top of the isolation block 140, thereby reducing the motion resistance between the top of the isolation block 140 and the roller 130.

[0055] like Figure 11 As shown, another embodiment of the present invention provides an ultra-thin crossed roller bearing structure, which differs from the above embodiment in that the first guide plate 141 is replaced by the third guide plate 1411 and the second guide plate 157 is replaced by the fourth guide plate 1571.

[0056] Both the third guide plate 1411 and the fourth guide plate 1571 are arc-shaped plates. The arc-shaped openings of the third guide plate 1411 and the fourth guide plate 1571 are arranged opposite each other. The arc-shaped design makes it easier for the lubricating oil to be collected.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A structure for an ultra-thin crossed roller bearing, characterized in that, It includes an inner bearing ring, an outer bearing ring, and rollers. The inner bearing ring and the outer bearing ring are coaxially rotatable. Multiple rollers are provided and located between the inner and outer bearing rings. The rollers are cylindrical, and the axes of two adjacent rollers are perpendicular to each other. An isolation block is provided between two adjacent rollers. The isolation block is a cube or cuboid block. The outer surface of the isolation block has two opposite and parallel contact surfaces. The contact surfaces are square. Each contact surface has two cylindrical grooves. The axes of the two cylindrical grooves are perpendicular to each other and intersect. The cylindrical grooves are used to fit against the outer circumferential surface of the roller.

2. The ultra-thin crossed roller bearing structure according to claim 1, characterized in that, A raceway is formed between the inner ring and the outer ring of the bearing. The raceway is annular and coaxial with the inner ring of the bearing. The roller is located in the raceway and can slide along the raceway. The raceway is filled with lubricating oil. The two contact surfaces are divided into a first contact surface and a second contact surface, which are distributed sequentially along the front-to-back direction in the extension direction of the raceway. The isolation block is divided into a front half and a rear half along the front-to-back direction, with the first contact surface located on the front half and the second contact surface located on the rear half. The front half of the isolation block is provided with a first oil guiding channel, and the rear half of the isolation block is provided with a second oil guiding channel. When the roller pushes the isolation block forward in the raceway, the second oil guiding channel can collect the lubricating oil in the raceway and guide it to the second contact surface. When the roller pushes the isolation block backward in the raceway, the first oil guiding channel can collect the lubricating oil in the raceway and guide it to the first contact surface.

3. The ultra-thin crossed roller bearing structure according to claim 2, characterized in that, The outer surface of the isolation block also has four oil-guiding sides. Each oil-guiding side has a first oil inlet hole on its front half. The front half of the isolation block has a first oil storage cavity inside. The first contact surface has a first oil outlet hole. The first oil inlet hole is connected to the first oil outlet hole through the first oil storage cavity to form a first oil guiding channel. Each oil-guiding side has a second oil inlet hole on its rear half. The rear half of the isolation block has a second oil storage cavity inside. The second contact surface has a second oil outlet hole. The second oil inlet hole is connected to the second oil outlet hole through the second oil storage cavity to form a second oil guiding channel.

4. The ultra-thin crossed roller bearing structure according to claim 3, characterized in that, Each of the oil-guiding sides is provided with a first guide plate at the position corresponding to the first oil inlet hole. The first guide plate is used to guide the lubricating oil in the raceway into the first oil inlet hole. The first guide plate is inclined relative to the oil-guiding side. Each of the oil-guiding sides is provided with a second guide plate at the position corresponding to the second oil inlet hole. The second guide plate is used to guide the lubricating oil in the raceway into the second oil inlet hole. The second guide plate is inclined relative to the oil-guiding side. The first guide plate and the second guide plate are in one-to-one correspondence. The first guide plate and the second guide plate both extend along a first direction, which is perpendicular to the front-back direction. The end of the first guide plate away from the oil-guiding side faces the second contact surface, and the end of the second guide plate away from the oil-guiding side faces the first contact surface.

5. The ultra-thin crossed roller bearing structure according to claim 4, characterized in that, Each of the oil guide sides is provided with a first mounting groove on the front half of the side. The first guide plate is slidably disposed in the first mounting groove and extends out of the first mounting groove. The first mounting groove is also provided with a first elastic sheet. The first elastic sheet is connected to the first guide plate. When the lubricating oil pushes the first guide plate, the first elastic sheet can change the length of the first guide plate extending out of the first mounting groove. The rear half of each of the oil guide sides is also provided with a second mounting groove. The second guide plate is slidably disposed in the second mounting groove and extends out of the second mounting groove. The second mounting groove is also provided with a second elastic sheet. The second elastic sheet is connected to the second guide plate. When the lubricating oil pushes the second guide plate, the second elastic sheet can change the length of the second guide plate extending out of the second mounting groove.

6. The ultra-thin crossed roller bearing structure according to claim 5, characterized in that, Both the first and second elastic sheets are V-shaped.

7. The ultra-thin crossed roller bearing structure according to claim 3, characterized in that, The first oil outlet has two rows, and the two rows of first oil outlets are distributed along the axes of the two cylindrical grooves on the first contact surface, with at least six first oil outlets in each row; the second oil outlet has two rows, and the two rows of second oil outlets are distributed along the axes of the two cylindrical grooves on the second contact surface, with at least six second oil outlets in each row.

8. The ultra-thin crossed roller bearing structure according to claim 4, characterized in that, A transition surface is formed at the connection between two adjacent oil guiding sides. A third oil outlet hole is provided on the front half of each transition surface, and a fourth oil outlet hole is provided on the rear half of each transition surface. A third oil inlet hole is provided on the front half of each oil guiding side, and a fourth oil inlet hole is provided on the rear half of each oil guiding side. Each of the third oil inlets is connected to a third oil outlet on one of the transition surfaces connected to the oil guide side opposite to it, thereby forming a third oil guide channel. Each of the fourth oil inlets is connected to a fourth oil outlet on one of the transition surfaces connected to the oil guide side opposite to it, thereby forming a fourth oil guide channel. The third oil guide channel and the fourth oil guide channel correspond one to one and are arranged in parallel.

9. The ultra-thin crossed roller bearing structure according to claim 8, characterized in that, The third oil inlet corresponds to the first oil inlet, and the straight line between the first and third oil inlets is parallel to the first guide plate. The fourth oil inlet corresponds to the second oil inlet, and the straight line between the second and fourth oil inlets is parallel to the second guide plate.

10. The ultra-thin crossed roller bearing structure according to claim 1, characterized in that, The bearing outer ring is provided with a placement groove, which extends radially along the bearing outer ring and communicates with the interior of the raceway. The placement groove is used to place rollers and spacers in the raceway. A plug is detachably installed in the placement groove, which can seal the raceway.

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