Cross bearing

Abstract

The invention relates to the field of bearing structures, in particular to a cross bearing which comprises an outer rotating ring and a mounting plate, an inner rotating ring is rotatably mounted in the outer rotating ring, a plurality of rollers are filled between a V-shaped sliding groove of the outer rotating ring and a V-shaped channel of the inner rotating ring, a fixing ring is fixedly mounted on the outer wall of the outer rotating ring, and the mounting plate is fixedly mounted on the outer wall of the fixing ring. The fixing ring is fixedly mounted on the mounting plate, the cylinder edges at the two ends of the roller are shaped into smooth curved surfaces, a round hole is formed in the center of the mounting plate, a fixed pressure reduction structure is mounted on the outer side of the round hole of the mounting plate, and a rotary pressure reduction structure is mounted on the inner wall of the round hole in the center of the mounting plate. The roller has the beneficial effects that the roller is subjected to modification optimization design, the cylinder edges at the two ends of the roller are modified into smooth curved surfaces so as to relieve the stress concentration phenomenon of the edges of the roller under the bending moment working condition, and the possibility of local deformation of the mounting plate, the roller, the inner ring, the outer ring and the fixing ring is reduced in cooperation with the fixed pressure reduction structure and the rotary pressure reduction structure.

Description

Technical Field

[0001] The invention relates to the field of bearing structures, and in particular to a cross bearing. Background Art

[0002] Cross bearings are high-precision rolling bearings. Different from traditional spherical balls, cross bearings use cross-arranged cylindrical rollers. Their unique structure can withstand radial, axial and tilt loads from all directions. Under bending moment conditions, the existing cross bearings are prone to excessive pressure on the edge of the rollers and less load on the center due to uneven pressure in the contact area between the rollers and the bearing tracks. This phenomenon is also called 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 scratches, indentations or fatigue cracks on the surface. This surface damage will affect the smoothness of the bearing and increase the friction. In addition, since the pressure on the edge of the roller is greater than that on the center, it is easy to cause the wear of the edge to increase. This 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, it is easy to cause the roller to roll unsteadily, generating vibration or noise, which not only affects the running accuracy of the bearing, but may also cause the overall performance of the mechanical equipment to decline;

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

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

[0007] 5. Excessive edge pressure may cause local deformation of rollers, inner and outer rings and bearing mounting plates, especially under high load and high pressure conditions. This deformation will affect the accuracy and stability of the bearing, causing errors during operation and affecting the normal operation of the equipment;

[0008] Therefore, it is necessary to invent a cross bearing. Summary of the invention

[0009] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cross bearing, comprising an outer rotating ring and a mounting plate, wherein an inner rotating ring is rotatably mounted inside the outer rotating ring, a V-shaped groove is arranged on the inner wall of the outer rotating ring, and a V-shaped groove is also arranged in the middle of the outer wall of the inner rotating ring, a plurality of rollers are filled between the V-shaped groove of the outer rotating ring and the V-shaped groove of the inner rotating ring, a fixing ring is fixedly mounted on the outer wall of the outer rotating ring, and the fixing ring is fixedly mounted on the mounting plate, the rollers are cylindrical in structure, the adjacent rollers are arranged crosswise with each other, and the two sides of the rollers are arranged crosswise with each other. The edge of the cylinder at the end is trimmed into a smooth curved surface, and the cylindrical edge that is trimmed into a curved surface by the roller is used to relieve edge stress concentration. A circular hole is arranged in the center of the mounting plate, and a fixed decompression structure is installed on the outer side of the circular hole of the mounting plate close to the fixed ring. The fixed decompression structure is used to relieve the pressure of the fixed ring on the surface of the mounting plate. The end of the inner rotating ring close to the mounting plate extends into the central circular hole of the mounting plate, and a rotating decompression structure is installed on the inner wall of the central circular hole of the mounting plate. The rotating decompression 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 decompression structure includes a rubber inner ring, which is embedded in and installed on the surface of the outer side of the circular hole of the mounting plate close to the outer rotating ring, and a decompression inner ring is fixedly bonded to the surface of the rubber inner ring on one side close to the outer rotating ring, and a side of the decompression inner ring away from the rubber inner ring is fixedly connected to the outer rotating ring, and a gap is provided between the inner ring side and the outer ring side of the decompression inner ring and the surface of the mounting plate.

[0011] Preferably, the fixed decompression structure includes a rubber outer ring, which is embedded in and installed on the surface of the outer side of the circular hole of the mounting plate close to the fixed ring, and the decompression outer ring is fixedly bonded to the surface of the rubber outer ring close to the fixed ring, and the side of the decompression outer ring away from the rubber outer ring is in contact with the surface of the fixed ring, and a gap is provided between the inner ring side and the outer ring side of the decompression outer ring and the surface of the mounting plate.

[0012] Preferably, the rotating decompression structure includes an alloy outer ring, the inner wall of the central circular hole of the mounting plate is provided with an annular groove, 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 number of diamond-shaped metal spring leaves are arranged inside the spring tube, and the outside of the spring tube is wrapped with rubber material.

[0013] Preferably, the rotating decompression structure includes an alloy inner ring, which is fixedly bonded to the side of the spring tube away from the alloy outer ring, and the portion of the outer wall of the inner rotating ring extending into the central circular hole of the mounting plate is provided with an annular groove, and the alloy inner ring is slidably installed in the annular groove of the outer wall of the inner rotating ring, and a plurality of convex rails are provided on the side of the alloy inner ring away from the spring tube, and the convex rails on the surface of the alloy inner ring are slidably connected to the inner wall of the annular groove of the inner rotating ring.

[0014] Preferably, a slot is provided in the center of an end surface of the inner swivel ring extending into the central circular hole of the mounting plate, a connector is inserted and installed in the slot, a rotating shaft is inserted and installed in the end of the connector away from the inner swivel ring, third bolts are inserted and installed on both sides of the connector, and the third bolts pass through the connector and are threadedly connected to the inner wall of the slot.

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

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

[0017] Preferably, a second bolt is inserted into the threaded hole on the surface of the mounting plate, and 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 fixing ring in sequence, and the second bolt is threadedly connected to the inner wall of the threaded hole on the surface of the fixing ring.

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

[0019] The beneficial effects of the present invention are as follows: by optimizing the roller shaping design, the cylindrical edges at both ends of the roller are shaped into smooth curved surfaces to alleviate the stress concentration phenomenon at the edge of the roller under bending moment conditions, avoid pressure concentration on the edge of the roller causing scratches, indentations or fatigue cracks on the roller surface, reduce the wear of the edge part, make the roller roll more stable and quiet, and alleviate 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 increase the service life of the bearing; combined with the fixed decompression structure and the rotating decompression structure, the pressure of the fixed ring on the surface of the mounting plate and the pressure of the inner swivel ring on the inner wall of the circular hole of the mounting plate under bending moment conditions are alleviated, and the mounting plate, fixed ring, outer swivel ring and inner swivel ring are further protected to avoid their collapse, so as to reduce the possibility of local deformation of the mounting plate, roller, inner and outer rings and fixed ring, ensure the accuracy and stability of the bearing, and reduce the error during the operation of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A front view of a cross bearing provided by the present invention;

[0021] Figure 2 A schematic diagram of the connection of a mounting plate of a cross bearing provided by the present invention;

[0022] Figure 3 An exploded view of a cross bearing provided by the present invention;

[0023] Figure 4 An exploded diagram of a fixed decompression structure of a cross bearing provided by the present invention;

[0024] Figure 5 A cross-sectional view of a mounting plate of a cross bearing provided by the present invention;

[0025] Figure 6 A cross-sectional view of the inner and outer swivel rings of a cross bearing provided by the present invention;

[0026] Figure 7 A back view of a cross bearing provided by the present invention;

[0027] Figure 8 An exploded diagram of a rotational decompression structure of a cross bearing provided by the present invention;

[0028] Fig. 9 A cross-sectional view of a cross bearing provided by the present invention;

[0029] Fig.10 A cross-sectional back view of a cross bearing provided by the present invention;

[0030] Fig.11 The present invention provides Fig.10Detail of Figure B;

[0031] Fig.12 The present invention provides Fig.10 Detail of Figure A;

[0032] Fig.13 A cross-sectional view of a roller of a cross bearing provided by the present invention;

[0033] Fig.14 A roller convexity modification model for a cross bearing is provided by the present invention.

[0034] In the figure: inner swivel 11, groove 12, slot 13, notch 14, inner ring sealing block 15, outer swivel 16, fixing 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 invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] Embodiment 1, as Figure 1 - Figure 6 , Fig.13 and Fig.14 As shown, a cross bearing in an embodiment of the first aspect of the present invention comprises an outer rotating ring 16 and a mounting plate 21, an inner rotating ring 11 is rotatably mounted inside the outer rotating ring 16, a V-shaped groove is arranged on the inner wall of the outer rotating ring 16, a V-shaped groove is also arranged in the middle of the outer wall of the inner rotating ring 11, 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, 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, the rollers 18 are cylindrical in structure, adjacent rollers 18 are arranged crosswise with each other, and both ends of the rollers 18 are The edge of the cylinder is modified into a smooth curved surface, and the roller 18 is modified into a curved cylindrical edge to relieve edge stress concentration. A circular hole is provided in the center of the mounting plate 21, and a fixed decompression structure is installed on the outer side of the circular hole of the mounting plate 21 close to the fixed ring 17. 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 through simulation analysis and the modification optimization design of the roller 18 is performed, and the cylindrical edges at both ends of the roller 18 are modified into smooth curved surfaces, and the remaining dimensional accuracy of the roller 18 is determined according to the general roller design, so as to alleviate the stress concentration phenomenon at the edge of the roller 18 under the bending moment condition, avoid the pressure concentration on the edge of the roller 18 causing scratches, indentations or fatigue cracks on the surface of the roller 18, reduce the wear of the edge part, make the rolling of the roller 18 more stable and quiet, and can also alleviate the heat accumulation phenomenon of the bearing, make the load distribution of the roller uniform, greatly optimize the performance of the bearing, and increase the service life of the bearing;

[0038] Combined with the fixed decompression structure and the rotating decompression 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 under the bending moment working condition are relieved, and the mounting plate 21, the fixed ring 17, the outer rotating ring 16 and the inner rotating ring 11 are further protected to avoid their collapse, so as to reduce the possibility of local deformation of the mounting plate 21, the roller 18, the outer rotating ring 16, the inner rotating ring 11 and the fixed ring 17, ensure the accuracy and stability of the bearing, and reduce the error during the operation of the bearing;

[0039] The mounting plate 21 is made of 17-4PH / 15-5PH material and adopts solid solution + aging heat treatment. The hardness of the mounting plate 21 is HRC40-47. In order to ensure the relative position and size requirements of the mounting plate, the machining is completed by a turning and milling machining center in one clamping. After the machining is completed, it is polished to remove chamfer burrs and sharp changes.

[0040] Embodiment 2, as Figure 2 - Figure 7 and Fig. 9 - Fig.11 As shown, a cross bearing includes embodiment 1, in addition, a fixed decompression structure includes a rubber inner ring 25, the rubber inner ring 25 is embedded and installed on the surface of the outer side of the circular hole of the mounting plate 21 close to the outer rotating ring 16, a decompression inner ring 23 is fixedly bonded to the surface of the rubber inner ring 25 close to the outer rotating ring 16, the side of the decompression inner ring 23 away from the rubber inner ring 25 is fixedly connected to the outer rotating ring 16, a gap is provided between the inner ring side and the outer ring side of the decompression inner ring 23 and the surface of the mounting plate 21, and the fixed decompression structure includes a rubber outer ring 24, the rubber outer ring 24 is embedded and installed on the surface of the outer side of the circular hole of the mounting plate 21 close to the fixed ring 17, a decompression outer ring 22 is fixedly bonded to the surface of the rubber outer ring 24 close to the fixed ring 17, the side of the decompression outer ring 22 away from the rubber outer ring 24 is in contact with the surface of the fixed ring 17, and a gap is provided between the inner ring side and the outer ring side of the decompression 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. Under the bending moment condition, one side of the fixed ring 17 in contact with the pressure-reducing outer ring 22 will deflect and squeeze the pressure-reducing outer ring 22, and at the same time, one side of the outer rotating ring 16 in contact with the pressure-reducing inner ring 23 will deflect and squeeze the pressure-reducing inner ring 23. After being squeezed, the pressure-reducing outer ring 22 and the pressure-reducing inner ring 23 will transfer the pressure to the rubber outer ring 24 and the rubber inner ring 25 respectively. The rubber outer ring 24 and the rubber inner ring 25 deform and absorb part of the pressure, which is converted into elastic potential energy, so as to achieve the effect of alleviating the surface pressure of the fixed ring 17 and the outer rotating ring 16 on the mounting plate 21 under the bending moment condition, thereby avoiding mutual squeezing and damage between the mounting plate 21, the fixed ring 17 and the outer rotating ring 16.

[0042] Embodiment 3, as Figure 2 - Figure 5 and Figure 8 - Fig.12 As shown, a cross bearing includes embodiment 1. In addition, the rotational decompression structure includes an alloy outer ring 26, and an annular groove is provided on the inner wall of the central circular hole of the mounting plate 21. 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. A spring tube 27 is fixedly bonded to the side of the alloy outer ring 26 away from the inner wall of the circular hole of the mounting plate 21. A plurality of diamond-shaped metal spring sheets are arranged inside the spring tube 27. The outside of the spring tube 27 is wrapped with rubber material. The rotational decompression structure includes an alloy inner ring 28, and the alloy inner ring 28 is fixedly bonded to the side of the spring tube 27 away from the alloy outer ring 26. The portion of the outer wall of the inner rotating ring 11 extending to the central circular hole of the mounting plate 21 is provided with an annular groove. The alloy inner ring 28 is slidably installed in the annular groove on the outer wall of the inner rotating ring 11. A plurality of convex rails are provided on the side of the alloy inner ring 28 away from the spring tube 27. The convex rails on the surface of the alloy inner ring 28 are slidably connected with the inner wall of the annular 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 both made of the same 17-4PH / 15-5PH material as the mounting plate 21. The convex rail on the surface of the alloy inner ring 28 has the effect of reducing the contact area with the inner wall of the annular groove of the inner swivel ring 11 and reducing the friction. Under the bending moment condition, one side of the outer wall of the inner swivel ring 11 will squeeze the alloy inner ring 28. After being subjected to pressure, the alloy inner ring 28 approaches the alloy outer ring 26. At the same time, the metal spring leaf in the spring tube 27 deforms and absorbs part of the pressure, converting it into elastic potential energy, so as to achieve the effect of alleviating the surface pressure of the inner swivel ring 11 on the mounting plate 21 under the bending moment condition, while ensuring the rotation performance of the inner swivel ring 11 and avoiding mutual squeezing and damage between the mounting plate 21 and the inner swivel ring 11.

[0044] Embodiment 4, as Figure 2 - Figure 7 , Fig. 9and Fig.10 As shown, a cross bearing includes embodiment 1. In addition, a slot 13 is provided in the center of one end surface of the inner swivel ring 11 extending into the central circular hole of the mounting plate 21, a connector 32 is inserted and installed in the slot 13, a rotating shaft 31 is inserted and installed in the end of the connector 32 away from the inner swivel ring 11, third bolts 33 are inserted and installed on both sides of the connector 32, the third bolts 33 pass through the connector 32 and are threadedly connected to the inner wall of the slot 13, a notch 14 is provided on the side of the inner swivel ring 11 away from the rotating shaft 31, the notch 14 passes through the surface of the inner swivel ring 11 and extends to the inner wall of the V-shaped channel of the inner swivel ring 11, the roller 18 can pass through the notch 14 and be filled into the V-shaped channel of the inner swivel ring 11, an inner ring sealing block 15 is inserted and installed in the notch 14, a first bolt 19 is inserted and installed on the surface of the inner ring sealing block 15, the first bolt 19 passes through the inner ring sealing block 15 and is threadedly connected to the inner wall of the notch 14.

[0045] In the above embodiment, 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 the bending moment condition, the rotating shaft 31 will pry the inner rotating ring 11 to squeeze the mounting plate 21, the outer rotating ring 16, 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. The pressure on the rotating shaft 31 under the bending moment condition is simulated to test and adjust the convexity modification model of the roller 18 and perform modification optimization design on the roller 18.

[0046] Embodiment 5, as Figure 1 - Figure 7 As shown, a cross bearing includes embodiment 2, in addition, a plurality of threaded holes are arranged on the surface of the fixing ring 17, and the side of the fixing ring 17 away from the mounting plate 21 is arranged as an inclined surface, and the angle between the inclined surface of the fixing ring 17 and the outer ring surface of the outer rotating ring 16 is 135°, a plurality of small holes are arranged on the surface of the pressure reducing outer ring 22, a plurality of small holes are also arranged on the surface of the rubber outer ring 24, and a plurality of threaded holes are also arranged on the outer surface of the central circular hole of the mounting plate 21, and a second bolt 29 is inserted and installed in the threaded hole on the surface of the mounting plate 21, and 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 fixing ring 17 in sequence, and the second bolt 29 is threadedly connected to the inner wall of the threaded hole on the surface of the fixing ring 17.

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

[0048] Embodiment 6, as Figure 3As shown, a cross bearing includes embodiment 1, in addition, the outer rotating ring 16 adopts an overall 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 a matrix tempering treatment, and the V-shaped groove of the inner rotating ring 11 adopts a local induction quenching and tempering process, and then the V-shaped groove of the inner rotating ring 11 is subjected to supplementary tempering to eliminate grinding stress after rough grinding.

[0049] In the above embodiment, it should be noted that the outer rotating ring 16 is made of ZGCr15 material, and its overall hardness meets the following requirements: HRC58-62, which complies with the relevant requirements of GJB269A-2000; the inner rotating ring 11 is also made of ZGCr15 material, and its hardness meets the requirements of HRC30-38; and the hardness of the groove of the inner rotating ring 11 meets the requirements of HRC58-62; and meets the relevant requirements of GJB269A-2000.

[0050] The use process of the present invention is as follows: when the present invention is used under the bending moment working condition, 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. First, the stress concentration phenomenon at the edge of the roller 18 is effectively alleviated by the roller 18 after the modification and optimization; then, one side of the outer rotating ring 16 in contact with the decompression inner ring 23 will deflect and squeeze the decompression inner ring 23, and the decompression outer ring 22 and the decompression inner ring 23 will transfer the pressure to the rubber outer ring 24 and the rubber inner ring 25 respectively after being squeezed, and the rubber outer ring 24 and the rubber inner ring 25 will deform and absorb part of the pressure, converting it into elastic potential energy to relieve the surface pressure of the fixing ring 17 and the outer rotating ring 16 on the mounting plate 21; at the same time, one side of the outer wall of the inner rotating ring 11 will squeeze the alloy inner ring 28, and the alloy inner ring 28 will approach the alloy outer ring 26 after being under pressure, and the metal spring leaf in the spring tube 27 will deform and absorb part of the pressure, converting it into elastic potential energy to relieve the surface pressure of the inner rotating ring 11 on the mounting plate 21.

[0051] The above is only a preferred embodiment of the present invention. Any person skilled in the art may modify the present invention by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

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), a V-shaped groove is arranged on the inner wall of the outer rotating ring (16), and a V-shaped groove is also arranged in the middle of the outer wall of the inner rotating ring (11), 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), 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, and adjacent rollers (18) are arranged in a cross-arrangement. The cylindrical edges at both ends of the roller (18) are modified into smooth curved surfaces. The cylindrical edges of the roller (18) modified into curved surfaces are used to relieve edge stress concentration. A circular hole is provided in the center of the mounting plate (21). A fixed decompression structure is installed on the outer side of the circular hole of the mounting plate (21) close to the fixed ring (17). The fixed decompression 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 installed with a rotating decompression structure. 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).

2. A cross bearing according to claim 1, characterized in that: The fixed decompression structure comprises a rubber inner ring (25), wherein the rubber inner ring (25) is embedded and mounted on the surface of the outer side of the circular hole of the mounting plate (21) close to the outer rotating ring (16), a decompression inner ring (23) is fixedly bonded to the surface of the rubber inner ring (25) on one side close to the outer rotating ring (16), and a side of the decompression inner ring (23) away from the rubber inner ring (25) is fixedly connected to the outer rotating ring (16), and a gap is provided between the inner ring side surface and the outer ring side surface of the decompression inner ring (23) and the surface of the mounting plate (21).

3. A cross bearing according to claim 2, characterized in that: The fixed decompression structure comprises a rubber outer ring (24), the rubber outer ring (24) being embedded and mounted on the surface of the outer side of the circular hole of the mounting plate (21) close to the fixed ring (17), a decompression outer ring (22) being fixedly bonded to the surface of the rubber outer ring (24) close to the fixed ring (17), a side of the decompression outer ring (22) away from the rubber outer ring (24) being in contact with the surface of the fixed ring (17), and a gap being provided between the inner ring side surface and the outer ring side surface of the decompression outer ring (22) and the surface of the mounting plate (21).

4. A cross bearing according to claim 1, characterized in that: The rotating decompression 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 mounted in the annular groove of the inner wall of the circular hole of the mounting plate (21), a spring tube (27) is fixedly bonded to the side of the alloy outer ring (26) away from the inner wall of the circular hole of the mounting plate (21), a plurality of diamond-shaped metal spring sheets are arranged inside the spring tube (27), and the outside of the spring tube (27) is wrapped with rubber material.

5. A cross bearing according to claim 4, characterized in that: The rotating decompression structure comprises an alloy inner ring (28), which is fixedly bonded to a side of the spring tube (27) away from the alloy outer ring (26); a portion of the outer wall of the inner rotating ring (11) extending to the central circular hole of the mounting plate (21) is provided with an annular groove; the alloy inner ring (28) is slidably mounted in the annular groove of the outer wall of the inner rotating ring (11); a 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 slidably connected to the inner wall of the annular groove of the inner rotating ring (11).

6. The cross bearing according to claim 1, characterized in that: A slot (13) is provided at the center of one end surface of the inner rotating ring (11) extending into the central circular hole of the mounting plate (21); a connector (32) is inserted and installed in the slot (13); a rotating shaft (31) is inserted and installed at one end of the connector (32) away from the inner rotating ring (11); third bolts (33) are inserted and installed on both sides of the connector (32); the third bolts (33) pass through the connector (32) and are threadedly connected to the inner wall of the slot (13).

7. A cross bearing according to claim 6, characterized in that: The inner rotating ring (11) is provided with a notch (14) on the side of the inner rotating ring (11) away from the rotating shaft (31), and 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), and the roller (18) can pass through the notch (14) and be loaded into the V-shaped groove of the inner rotating ring (11), and an inner ring sealing block (15) is inserted and installed in the notch (14), and a first bolt (19) is inserted and installed 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 to the inner wall of the notch (14).

8. The cross bearing according to claim 3, characterized in that: The surface of the fixing ring (17) is provided with a plurality of threaded holes. The side of the fixing ring (17) away from the mounting plate (21) is provided with an inclined surface. The angle between the inclined surface of the fixing ring (17) and the outer ring surface of the outer rotating ring (16) is 135°. The surface of the pressure reducing 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 threaded holes. The outer surface of the central circular hole of the mounting plate (21) is also provided with a plurality of threaded holes.

9. A cross bearing according to claim 8, characterized in that: A second bolt (29) is inserted into the threaded hole on the surface of the mounting plate (21), and 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 fixing ring (17) in sequence, and the second bolt (29) is threadedly connected to the inner wall of the threaded hole on the surface of the fixing ring (17).

10. The cross bearing according to claim 1, characterized in that: The outer rotating ring (16) adopts an overall 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 a matrix tempering treatment, and the V-shaped groove of the inner rotating ring (11) adopts a local induction quenching and tempering process, and then the V-shaped groove of the inner rotating ring (11) is subjected to supplementary tempering to eliminate grinding stress after rough grinding.

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