A cross bearing

Abstract

The present application relates to the field of bearing structure, specifically relates to a cross bearing, its technical scheme is: including, outer race and mounting plate, the inner race is rotatably installed in the outer race, the outer race V type sliding groove is filled with a plurality of rollers between inner race V type channel, the outer race outer wall is fixedly installed with the fixed ring, the fixed ring is fixedly installed on the mounting plate, the cylindrical edge of the both ends of the roller is shaped as a smooth curve, the mounting plate is provided with a round hole in the center, the mounting plate round hole outside is installed with fixed pressure relief structure, the rotating pressure relief structure is installed on the inner wall of the mounting plate central round hole, the beneficial effects of the present application are: through the optimization design of the roller, the cylindrical edge of the both ends of the roller is shaped as a smooth curve, to relieve the stress concentration phenomenon of the roller edge under the bending moment condition, cooperate with the fixed pressure relief structure and the rotating pressure relief structure, reduce the possibility of local deformation of the mounting plate, the roller and the inner and outer ring and the fixed ring.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bearing structure, in particular to a cross bearing. BACKGROUND

[0002] Cross bearing is a high-precision rolling bearing, which is different from traditional spherical ball bearings. Cross bearing adopts cross-arranged cylindrical rollers, and its unique structure can bear radial, axial and inclined loads from all directions. In the existing cross bearing, under the bending moment working condition, the pressure in the contact area between the roller and the bearing track is not uniform, which easily causes the phenomenon that the edge part of the roller bears excessive pressure while the central part bears less load. This phenomenon is also known as the edge effect of the roller, and the edge effect may cause a series of problems:

[0003] 1. Under the edge effect, the pressure is concentrated on the edge of the roller, which may cause surface damage such as scratches, indentations or fatigue cracks. Such surface damage will affect the smoothness of the bearing, increase the friction, and because the pressure on the edge of the roller is greater than that on the center part, the wear of the edge part is easily intensified. Such uneven wear will shorten the service life of the bearing and reduce its performance;

[0004] 2. Due to the uneven distribution of load on the roller, the roller may roll unstably, causing vibration or noise, which not only affects the running accuracy of the bearing, but also may cause the overall performance of the mechanical equipment to decline;

[0005] 3. The edge effect may cause the local temperature of the edge of the roller to rise, resulting in heat accumulation. The local high temperature will accelerate the deterioration of the lubricating oil of the bearing, thereby affecting the lubrication effect, further aggravating the wear and possibly causing the bearing to overheat;

[0006] 4. Under the bending moment working condition, due to the uneven contact between the roller and the track of the bearing, the load distribution becomes uneven, which will cause the bearing to be unable to effectively bear the load and reduce its load-carrying capacity;

[0007] 5. Excessive edge pressure may cause local deformation of the roller, inner and outer rings and bearing mounting plate, especially under high load and high pressure. Such deformation will affect the accuracy and stability of the bearing, cause errors during operation and affect the normal work of the equipment;

[0008] Therefore, it is necessary to invent a cross bearing. SUMMARY

[0009] In order to achieve the above object, the present application provides the following technical scheme: A cross bearing, comprising an outer rotating ring and a mounting plate, the inner rotating ring is rotatably installed in the outer rotating ring, a V-shaped groove is arranged on the inner wall of the outer rotating ring, a V-shaped groove is also arranged on the middle part of the outer wall of the inner rotating ring, a plurality of rollers are filled between the V-shaped sliding groove of the outer rotating ring and the V-shaped groove of the inner rotating ring, a fixed ring is fixedly installed on the outer wall of the outer rotating ring, the fixed ring is fixedly installed on the mounting plate, the roller is in a cylindrical structure, adjacent rollers are arranged in cross arrangement, the cylindrical edge of the both ends of the roller is shaped as a smooth curved surface, the cylindrical edge of the roller is shaped as a curved surface to relieve the edge stress concentration, a circular hole is arranged in the center of the mounting plate, a fixed pressure relief structure is installed on the surface of the mounting plate outside the circular hole close to the fixed ring, the fixed pressure relief structure is used to relieve the pressure of the fixed ring on the surface of the mounting plate, one end of the inner rotating ring close to the mounting plate extends into the central circular hole of the mounting plate, a rotating pressure relief structure is installed on the inner wall of the central circular hole of the mounting plate, the rotating pressure relief structure is used to relieve the pressure of the inner rotating ring on the inner wall of the circular hole of the mounting plate.

[0010] Preferably, the fixed pressure relief structure comprises a rubber inner ring, the rubber inner ring is embedded and installed on the surface of the mounting plate outside the circular hole close to the outer rotating ring, a pressure relief inner ring is fixedly bonded to the surface of the rubber inner ring close to the outer rotating ring, the side of the pressure relief inner ring away from the rubber inner ring is fixedly connected with the outer rotating ring, and gaps are arranged between the inner ring side surface and the outer ring side surface of the pressure relief inner ring and the surface of the mounting plate.

[0011] Preferably, the fixed pressure relief structure comprises a rubber outer ring, the rubber outer ring is embedded and installed on the surface of the mounting plate outside the circular hole close to the fixed ring, a pressure relief outer ring is fixedly bonded to the surface of the rubber outer ring close to the fixed ring, the side of the pressure relief outer ring away from the rubber outer ring is in contact with the surface of the fixed ring, and gaps are arranged between the inner ring side surface and the outer ring side surface of the pressure relief outer ring and the surface of the mounting plate.

[0012] Preferably, the rotating pressure relief structure comprises an alloy outer ring, an annular groove is arranged on the inner wall of the central circular hole of the mounting plate, the alloy outer ring is fixedly installed in the annular groove on the inner wall of the circular hole of the mounting plate, a spring tube is fixedly bonded to the side of the alloy outer ring away from the inner wall of the circular hole of the mounting plate, a plurality of metal spring sheets in a rhombus structure are arranged in the spring tube, and the outer part of the spring tube is wrapped with rubber material.

[0013] Preferably, the rotating pressure relief structure comprises an alloy inner ring, the alloy inner ring is fixedly bonded to the side of the spring tube away from the alloy outer ring, the part of the outer wall of the inner rotating ring extending into the central circular hole of the mounting plate is provided with an annular sliding groove, the alloy inner ring is slidingly installed in the annular sliding groove of the outer wall of the inner rotating ring, a plurality of convex tracks are arranged on the side of the alloy inner ring away from the spring tube, and the surface convex track of the alloy inner ring is slidingly connected with the inner wall of the annular sliding groove of the inner rotating ring.

[0014] Preferably, the inner rotating ring extends to the end face of the central circular hole of the mounting plate, and a slot is arranged at the center of the end face, a connector is inserted and mounted in the slot, a rotating shaft is inserted and mounted at the end of the connector away from the inner rotating ring, third bolts are inserted and mounted on both sides of the connector, and the third bolts pass through the connector and are threadedly connected with the inner wall of the slot.

[0015] Preferably, the inner rotating ring is provided with a notch on the side away from the rotating shaft, the notch penetrates the surface of the inner rotating ring and extends to the inner wall of the V-shaped channel of the inner rotating ring, the roller can pass through the notch and be filled into the V-shaped channel of the inner rotating ring, an inner ring sealing block is inserted and mounted in the notch, a first bolt is inserted and mounted on the surface of the inner ring sealing block, and the first bolt penetrates the inner ring sealing block and is threadedly connected with the inner wall of the notch.

[0016] Preferably, the surface of the fixed ring is provided with a plurality of threaded holes, the side of the fixed ring away from the mounting plate is provided with an inclined surface, the angle between the inclined surface of the fixed ring and the surface of the outer circle of the outer rotating ring is 135°, the surface of the pressure reducing outer ring is provided with a plurality of small holes, the surface of the rubber outer ring is also provided with a plurality of small holes, and the outer surface of the central circular hole of the mounting plate is also provided with a plurality of threaded holes.

[0017] Preferably, a second bolt is inserted and mounted in the threaded hole on the surface of the mounting plate, the second bolt passes through the threaded hole on the surface of the mounting plate, the small hole on the surface of the rubber outer ring, the small hole on the surface of the pressure reducing outer ring and the threaded hole on the surface of the fixed ring in sequence, and the second bolt is threadedly connected with the inner wall of the threaded hole on the surface of the fixed ring.

[0018] Preferably, the outer rotating ring adopts a whole quenching and high-temperature tempering process, and then the outer rotating ring is subjected to a supplementary tempering to eliminate grinding stress after rough grinding, the inner rotating ring adopts a base body quenching and tempering treatment, and the V-shaped channel of the inner rotating ring adopts a local induction quenching and tempering process, and then the V-shaped channel of the inner rotating ring is subjected to a supplementary tempering to eliminate grinding stress after rough grinding.

[0019] The beneficial effects of the present application are: by optimizing the design of the roller, the edge of the column at both ends of the roller is shaped into a smooth curve, so as to relieve the stress concentration phenomenon of the edge of the roller under the bending moment working condition, avoid the damage such as scratch, indentation or fatigue crack of the surface of the roller caused by the pressure concentration on the edge of the roller, reduce the wear of the edge part, make the rolling of the roller more stable and quiet, and also relieve the heat accumulation phenomenon of the bearing, so that the load distribution of the roller becomes uniform, greatly optimize the performance of the bearing, and improve the service life of the bearing; in combination with the fixed pressure relief structure and the rotating pressure relief structure, the pressure of the fixed ring on the surface of the mounting plate under the bending moment working condition and the pressure of the inner rotating ring on the inner wall of the circular hole of the mounting plate are relieved, the mounting plate, the fixed ring, the outer rotating ring and the inner rotating ring are further protected, and the collapse thereof is avoided, so as to reduce the possibility of local deformation of the mounting plate, the roller and the inner and outer rings and the fixed ring, ensure the precision and stability of the bearing, and reduce the error in the running process of the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A front view of a cross bearing is provided for the present application.

[0021] Figure 2 A mounting plate connection diagram of a cross bearing is provided for the present application.

[0022] Figure 3 An exploded view of a cross bearing is provided for the present application.

[0023] Figure 4 An exploded view of a fixed pressure relief structure of a cross bearing is provided for the present application.

[0024] Figure 5 A mounting plate sectional view of a cross bearing is provided for the present application.

[0025] Figure 6 An inner and outer rotating ring sectional view of a cross bearing is provided for the present application.

[0026] Figure 7 A back view of a cross bearing is provided for the present application.

[0027] Figure 8 An exploded view of a rotating pressure relief structure of a cross bearing is provided for the present application.

[0028] Figure 9 A sectional view of a cross bearing is provided for the present application.

[0029] Figure 10 A back sectional view of a cross bearing is provided for the present application.

[0030] Figure 11 A cross bearing is provided for the present application. Figure 10a detail view B of the cross bearing;

[0031] Figure 12 a cross bearing provided by the present application Figure 10 a detail view A of the cross bearing;

[0032] Figure 13 a roller sectional view of a cross bearing provided by the present application;

[0033] Figure 14 a roller camber modification model of a cross bearing provided by the present application.

[0034] In the figure: inner rotating ring 11, groove 12, insertion slot 13, notch 14, inner ring sealing block 15, outer rotating ring 16, fixed ring 17, roller 18, first bolt 19, mounting plate 21, decompression outer ring 22, decompression inner ring 23, rubber outer ring 24, rubber inner ring 25, alloy outer ring 26, spring tube 27, alloy inner ring 28, second bolt 29, rotating shaft 31, connector 32, third bolt 33. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application will be described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described here are only used to explain and illustrate the present application, and are not used to limit the present application.

[0036] Example 1, as shown in Figure 1 - Figure 6 , Figure 13 and Figure 14 A cross bearing in the first aspect of the present application is provided, which comprises an outer rotating ring 16 and a mounting plate 21, the inner rotating ring 11 is rotatably installed in the outer rotating ring 16, the inner wall of the outer rotating ring 16 is provided with a V-shaped channel, and the outer wall of the inner rotating ring 11 is also provided with a V-shaped channel, a plurality of rollers 18 are filled between the V-shaped sliding groove of the outer rotating ring 16 and the V-shaped channel of the inner rotating ring 11, the outer wall of the outer rotating ring 16 is fixedly installed with a fixed ring 17, the fixed ring 17 is fixedly installed on the mounting plate 21, the roller 18 is in a cylindrical structure, adjacent rollers 18 are arranged in a cross shape, the cylindrical edge of the roller 18 is modified to a smooth curved surface, the mounting plate 21 is provided with a circular hole in the center, and a fixed decompression structure is installed on the side of the mounting plate 21 close to the fixed ring 17 outside the circular hole, the fixed decompression structure is used to relieve the pressure of the fixed ring 17 on the surface of the mounting plate 21, the end of the inner rotating ring 11 close to the mounting plate 21 extends into the central circular hole of the mounting plate 21, and a rotating decompression structure is installed on the inner wall of the central circular hole of the mounting plate 21, the rotating decompression structure is used to relieve the pressure of the inner rotating ring 11 on the inner wall of the circular hole of the mounting plate 21.

[0037] In the above embodiment, it should be noted that the convexity modification model of the roller 18 is determined by simulation analysis, and the roller 18 is optimized and designed by modification, the edge of the cylinder at both ends of the roller 18 is modified into a smooth curve, and the remaining size precision of the roller 18 is determined according to the general roller design, so as to relieve the stress concentration phenomenon of the edge of the roller 18 under the bending moment working condition, avoid the damage such as scratch, indentation or fatigue crack of the surface of the roller 18 caused by the pressure concentration on the edge of the roller 18, reduce the wear of the edge part, make the rolling of the roller 18 more stable and quiet, and also relieve the heat accumulation phenomenon of the bearing, so that the load distribution of the roller becomes uniform, the performance of the bearing is greatly optimized, and the service life of the bearing is improved;

[0038] In combination with the fixed pressure relief structure and the rotating pressure relief structure, the pressure of the fixed ring 17 on the surface of the mounting plate 21 and the pressure of the inner rotating ring 11 on the inner wall of the circular hole of the mounting plate 21 are relieved, the mounting plate 21, the fixed ring 17, the outer rotating ring 16 and the inner rotating ring 11 are further protected, and the collapse of the mounting plate 21, the fixed ring 17, the outer rotating ring 16 and the inner rotating ring 11 is avoided, so as to reduce the possibility of local deformation of the mounting plate 21, the roller 18 and the outer rotating ring 16 and the inner rotating ring 11 and the fixed ring 17, ensure the precision and stability of the bearing, and reduce the error in the running process of the bearing.

[0039] The mounting plate 21 is made of 17-4PH / 15-5PH material, and adopts a solid solution + aging heat treatment mode. The hardness of the mounting plate 21 is HRC40-47. In order to ensure the relative position size requirement of the mounting plate, one clamping machining center is adopted for machining, and polishing treatment is adopted after machining to remove the chamfer burr and sharp change.

[0040] Embodiment 2, as shown in Figure 2 Figure 7 and Figure 9 Figure 11 A cross bearing, in addition to embodiment 1, the fixed pressure relief structure includes a rubber inner ring 25, which is embedded and mounted on the surface of the mounting plate 21 near the outer rotating ring 16 outside the circular hole, the side surface of the rubber inner ring 25 near the outer rotating ring 16 is fixedly bonded with a pressure relief inner ring 23, the side of the pressure relief inner ring 23 away from the rubber inner ring 25 is fixedly connected with the outer rotating ring 16, and the gap is provided between the inner ring side surface and the outer ring side surface of the pressure relief inner ring 23 and the surface of the mounting plate 21. The fixed pressure relief structure includes a rubber outer ring 24, which is embedded and mounted on the surface of the mounting plate 21 near the fixed ring 17 outside the circular hole, the side surface of the rubber outer ring 24 near the fixed ring 17 is fixedly bonded with a pressure relief outer ring 22, the side of the pressure relief outer ring 22 away from the rubber outer ring 24 is in contact with the surface of the fixed ring 17, and the gap is provided between the inner ring side surface and the outer ring side surface of the pressure relief outer ring 22 and the surface of the mounting plate 21.

[0041] ​​In the above embodiment, it should be noted that the pressure-reducing inner ring 23 and the pressure-reducing outer ring 22 are made of the same 17-4PH / 15-5PH material as the mounting plate 21. In the bending moment condition, the side of the fixed ring 17 in contact with the pressure-reducing outer ring 22 will deflect and extrude the pressure-reducing outer ring 22, and the side of the outer rotating ring 16 in contact with the pressure-reducing inner ring 23 will deflect and extrude the pressure-reducing inner ring 23. After being extruded, the pressure-reducing outer ring 22 and the pressure-reducing inner ring 23 will transmit the pressure to the rubber outer ring 24 and the rubber inner ring 25, respectively. Through the deformation of the rubber outer ring 24 and the rubber inner ring 25 and the absorption of part of the pressure, the pressure is converted into elastic potential energy, so as to achieve the effect of relieving the surface pressure of the mounting plate 21 in the bending moment condition, and avoid the mutual extrusion and damage between the mounting plate 21, the fixed ring 17 and the outer rotating ring 16.

[0042] Embodiment 3, as shown in Figure 2 Figure 5 and Figure 8 Figure 12 A cross bearing, in addition to embodiment 1, the rotating pressure-reducing structure includes an alloy outer ring 26, and the inner wall of the central circular hole of the mounting plate 21 is provided with an annular groove. The alloy outer ring 26 is fixedly installed in the annular groove on the inner wall of the circular hole of the mounting plate 21. The side of the alloy outer ring 26 away from the inner wall of the circular hole of the mounting plate 21 is fixedly bonded with a spring tube 27. A plurality of metal spring sheets in a rhombus structure are arranged in the spring tube 27. The spring tube 27 is wrapped with a rubber material on the outside. The rotating pressure-reducing structure includes an alloy inner ring 28. The alloy inner ring 28 is fixedly bonded on the side of the spring tube 27 away from the alloy outer ring 26. The part of the outer wall of the inner rotating ring 11 extending into the central circular hole of the mounting plate 21 is provided with an annular sliding groove. The alloy inner ring 28 is slidingly installed in the annular sliding groove on the outer wall of the inner rotating ring 11. The side of the alloy inner ring 28 away from the spring tube 27 is provided with a plurality of convex rails. The convex rails on the surface of the alloy inner ring 28 are slidingly connected with the inner wall of the annular sliding groove of the inner rotating ring 11.

[0043] In the above embodiment, it should be noted that the alloy outer ring 26 and the alloy inner ring 28 are made of the same 17-4PH / 15-5PH material as the mounting plate 21. The convex rails on the surface of the alloy inner ring 28 have the effect of reducing the contact area of the inner wall of the annular sliding groove of the inner rotating ring 11 and reducing the friction. In the bending moment condition, the side of the outer wall of the inner rotating ring 11 will extrude the alloy inner ring 28. After being pressed, the alloy inner ring 28 moves towards the alloy outer ring 26. At the same time, the metal spring sheets in the spring tube 27 deform and absorb part of the pressure, which is converted into elastic potential energy, so as to achieve the effect of relieving the surface pressure of the mounting plate 21 in the bending moment condition. While ensuring the rotating performance of the inner rotating ring 11, the mutual extrusion and damage between the mounting plate 21 and the inner rotating ring 11 are avoided.

[0044] Embodiment 4, as shown in Figure 2 Figure 7 Figure 9 ​​​​and Figure 10 As shown, a cross bearing includes Embodiment 1. Furthermore, an inner rotating ring 11 extends into the central hole of a mounting plate 21, where a slot 13 is provided at the center of its end face. A connector 32 is inserted into the slot 13. A rotating shaft 31 is inserted into the end of the connector 32 away from the inner rotating ring 11. Third bolts 33 are inserted into both sides of the connector 32, passing through the connector 32 and threadedly connected to the inner wall of the slot 13. A notch 14 is provided on the side of the inner rotating ring 11 away from the rotating shaft 31. The notch 14 penetrates the surface of the inner rotating ring 11 and extends to the inner wall of the V-shaped groove of the inner rotating ring 11. A roller 18 can pass through the notch 14 and be filled into the V-shaped groove of the inner rotating ring 11. An inner ring sealing block 15 is inserted into the notch 14. A first bolt 19 is inserted into the surface of the inner ring sealing block 15, penetrating the inner ring sealing block 15 and threadedly connected to the inner wall of the notch 14.

[0045] In the above embodiments, it should be noted that the rotating shaft 31 is connected to the inner rotating ring 11 through the connector 32 and the third bolt 33. Under bending moment conditions, the rotating shaft 31 will pry the inner rotating ring 11 to squeeze the mounting plate 21, the outer rotating ring 16 and the roller 18 and other components. After fixing the mounting plate 21, pressure is applied to the rotating shaft 31 once to test the static strength of the bearing assembly of the present invention. By simulating the pressure on the rotating shaft 31 under bending moment conditions, the convexity modification model of the roller 18 is tested and adjusted, and the roller 18 is modified and optimized.

[0046] Example 5, as Figure 1 - Figure 7 As shown, a cross bearing, including embodiment 2, is provided with a plurality of threaded holes on the surface of the retaining ring 17. The side of the retaining ring 17 away from the mounting plate 21 is set as an inclined surface. The angle between the inclined surface of the retaining ring 17 and the outer ring surface of the outer ring 16 is 135°. A plurality of small holes are provided on the surface of the pressure-reducing outer ring 22. A plurality of small holes are also provided on the surface of the rubber outer ring 24. A plurality of threaded holes are also provided on the outer surface of the central circular hole of the mounting plate 21. A second bolt 29 is inserted into the threaded hole on the surface of the mounting plate 21. The second bolt 29 passes through the threaded hole on the surface of the mounting plate 21, the small hole on the surface of the rubber outer ring 24, the small hole on the surface of the pressure-reducing outer ring 22, and the threaded hole on the surface of the retaining ring 17 in sequence. The second bolt 29 is threadedly connected to the inner wall of the threaded hole on the surface of the retaining ring 17.

[0047] In the above embodiment, it should be noted that the threaded hole cut angle on the inclined surface of the retaining ring 17 is 135°. Optimizing the 135° inclined edge connection of the threaded hole can effectively improve the overall structural strength of the bearing; the second bolt 29 is used to achieve the effect of connecting the retaining ring 17 and the mounting plate 21.

[0048] Example 6, as Figure 3As shown, a cross bearing, including embodiment 1, in addition, the outer race 16 adopts the integral quenching and high temperature tempering process, followed by the outer race 16 after rough machining for eliminating grinding stress supplementary tempering, the inner race 11 adopts the base quenching and tempering treatment, the V-shaped channel of the inner race 11 adopts the local induction quenching and tempering process, followed by the V-shaped channel of the inner race 11 after rough machining for eliminating grinding stress supplementary tempering.

[0049] In the above embodiment, it needs to be explained that the outer race 16 adopts ZGCr15 material, the integral hardness thereof meets HRC58-62, which meets the relevant requirements of GJB269A-2000; the inner race 11 also adopts ZGCr15 material, the hardness thereof meets HRC30-38; and the hardness of the channel of the inner race 11 meets HRC58-62; and meets the relevant requirements of GJB269A-2000.

[0050] The use process of the present application is as follows: under the bending moment working condition, the shaft 31 will pry the inner race 11 to extrude the mounting plate 21, the outer race 16 and the roller 18 and other components, first, the stress concentration phenomenon of the edge of the roller 18 is effectively relieved through the optimized roller 18; then the certain side of the outer race 16 in contact with the pressure relief inner ring 23 will be deflected to extrude the pressure relief inner ring 23, the pressure relief outer ring 22 and the pressure relief inner ring 23 will transmit the pressure to the rubber outer ring 24 and the rubber inner ring 25 respectively after being extruded, the rubber outer ring 24 and the rubber inner ring 25 are deformed and absorb part of the pressure, which is converted into elastic potential energy, so as to relieve the surface pressure of the mounting plate 21 by the fixed ring 17 and the outer race 16; at the same time, the certain side of the outer wall of the inner race 11 will extrude the alloy inner ring 28, the alloy inner ring 28 approaches the alloy outer ring 26 after being pressed, the metal spring sheet in the spring tube 27 is deformed and absorbs part of the pressure, which is converted into elastic potential energy, so as to relieve the surface pressure of the mounting plate 21 by the inner race 11.

[0051] The above is only the preferred embodiment of the present application, any skilled person in the art can modify the present application by using the technical solutions described above or modify it into equivalent technical solutions. Therefore, any simple modification or equivalent replacement according to the technical solutions of the present application is within the scope of protection claimed by the present application.

Claims

1. A cross bearing, comprising an outer rotating ring (16) and a mounting plate (21), wherein an inner rotating ring (11) is rotatably mounted inside the outer rotating ring (16), the inner wall of the outer rotating ring (16) is provided with a V-shaped groove, and the middle part of the outer wall of the inner rotating ring (11) is also provided with a V-shaped groove, wherein a plurality of rollers (18) are filled between the V-shaped groove of the outer rotating ring (16) and the V-shaped groove of the inner rotating ring (11), and a fixing ring (17) is fixedly mounted on the outer wall of the outer rotating ring (16), and the fixing ring (17) is fixedly mounted on the mounting plate (21), characterized in that: The roller (18) is in a cylindrical structure, adjacent rollers (18) are arranged crosswise, the cylindrical edges of the two ends of the roller (18) are shaped into smooth curves, the curved cylindrical edges of the roller (18) are used to relieve edge stress concentration, the central part of the mounting plate (21) is provided with a circular hole, one side of the mounting plate (21) outside the circular hole close to the fixed ring (17) is provided with a fixed pressure relief structure, the fixed pressure relief structure is used to relieve the pressure of the fixed ring (17) on the surface of the mounting plate (21), one end of the inner rotating ring (11) close to the mounting plate (21) extends into the central circular hole of the mounting plate (21), the inner wall of the central circular hole of the mounting plate (21) is provided with a rotating pressure relief structure, the rotating pressure relief structure is used to relieve the pressure of the inner rotating ring (11) on the inner wall of the circular hole of the mounting plate (21), the rotating pressure relief structure comprises an alloy outer ring (26), the inner wall of the central circular hole of the mounting plate (21) is provided with an annular groove, the alloy outer ring (26) is fixedly installed in the annular groove of the inner wall of the circular hole of the mounting plate (21), one side of the alloy outer ring (26) away from the inner wall of the circular hole of the mounting plate (21) is fixedly bonded with a spring tube (27), a plurality of metal reed pieces in a rhombus structure are arranged in the spring tube (27), the spring tube (27) is wrapped with rubber material on the outside, the rotating pressure relief structure comprises an alloy inner ring (28), the alloy inner ring (28) is fixedly bonded on one side of the spring tube (27) away from the alloy outer ring (26), the part of the outer wall of the inner rotating ring (11) extending into the central circular hole of the mounting plate (21) is provided with an annular sliding groove, the alloy inner ring (28) is slidingly installed in the annular sliding groove of the outer wall of the inner rotating ring (11), a plurality of convex tracks are arranged on one side of the alloy inner ring (28) away from the spring tube (27), the convex tracks on the surface of the alloy inner ring (28) are slidingly connected with the inner wall of the annular sliding groove of the inner rotating ring (11).

2. A cross bearing according to claim 1, characterized in that: The fixed pressure relief structure comprises a rubber inner ring (25), the rubber inner ring (25) is embedded and installed on the surface of the mounting plate (21) outside the circular hole close to the outer rotating ring (16), a pressure relief inner ring (23) is fixedly bonded on one side surface of the rubber inner ring (25) close to the outer rotating ring (16), one side of the pressure relief inner ring (23) away from the rubber inner ring (25) is fixedly connected with the outer rotating ring (16), gaps are arranged between the inner and outer side surfaces of the pressure relief inner ring (23) and the surface of the mounting plate (21).

3. A cross bearing according to claim 2, characterized in that: The fixed pressure relief structure comprises a rubber outer ring (24), the rubber outer ring (24) is embedded and installed on the surface of the mounting plate (21) outside the circular hole close to the fixed ring (17), a pressure relief outer ring (22) is fixedly bonded on one side surface of the rubber outer ring (24) close to the fixed ring (17), one side of the pressure relief outer ring (22) away from the rubber outer ring (24) is in contact with the surface of the fixed ring (17), gaps are arranged between the inner and outer side surfaces of the pressure relief outer ring (22) and the surface of the mounting plate (21).

4. A cross-coupled bearing according to claim 1, wherein: The end face of the inner rotating ring (11) extending into the central circular hole of the mounting plate (21) is provided with a slot (13) in the center, the connector (32) is inserted and mounted in the slot (13), the connector (32) is inserted and mounted with the rotating shaft (31) away from one end of the inner rotating ring (11), the third bolt (33) is inserted and mounted on both sides of the connector (32), and the third bolt (33) passes through the connector (32) and is threadedly connected with the inner wall of the slot (13).

5. A cross bearing according to claim 4, characterized in that: The inner rotating ring (11) is provided with a notch (14) away from the rotating shaft (31), the notch (14) penetrates the surface of the inner rotating ring (11) and extends to the inner wall of the V-shaped channel of the inner rotating ring (11), the roller (18) can pass through the notch (14) and be filled into the V-shaped channel of the inner rotating ring (11), the inner ring sealing block (15) is inserted and mounted in the notch (14), the first bolt (19) is inserted and mounted on the surface of the inner ring sealing block (15), and the first bolt (19) penetrates the inner ring sealing block (15) and is threadedly connected with the inner wall of the notch (14).

6. A cross bearing according to claim 3, characterized in that: The surface of the fixed ring (17) is provided with a plurality of threaded holes, the side away from the mounting plate (21) of the fixed ring (17) is provided as an inclined surface, the angle between the inclined surface of the fixed ring (17) and the outer surface of the outer rotating ring (16) is 135°, the surface of the decompression outer ring (22) is provided with a plurality of small holes, the surface of the rubber outer ring (24) is also provided with a plurality of small holes, and the outer surface of the central circular hole of the mounting plate (21) is also provided with a plurality of threaded holes.

7. A cross bearing according to claim 6, characterized in that: The second bolt (29) is inserted and mounted in the threaded hole on the surface of the mounting plate (21), the second bolt (29) passes through the threaded hole on the surface of the mounting plate (21), the small hole on the surface of the rubber outer ring (24), the small hole on the surface of the decompression outer ring (22) and the threaded hole on the surface of the fixed ring (17) in sequence, and the second bolt (29) is threadedly connected with the inner wall of the threaded hole on the surface of the fixed ring (17).

8. A cross-coupled bearing according to claim 1, wherein: The outer rotating ring (16) adopts integral quenching and high-temperature tempering process, and then the outer rotating ring (16) is subjected to supplementary tempering to eliminate grinding stress after rough grinding, the inner rotating ring (11) adopts base body quenching and tempering treatment, the V-shaped channel of the inner rotating ring (11) adopts local induction quenching and tempering process, and then the V-shaped channel of the inner rotating ring (11) is subjected to supplementary tempering to eliminate grinding stress after rough grinding.

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