A composite turntable bearing

Abstract

The present invention discloses a composite turntable bearing, which relates to the technical field of turntable bearings and comprises a base, wherein a support rod is fixedly connected to the inner wall of the base, the number of the support rods is several, and the several support rods are evenly distributed, and a limiting mechanism can be connected by setting several support rods, so that the limiting mechanism is connected to the inner cavity of the base, so that the limiting mechanism can be tightly connected to the base, and the end of the support rod is fixedly connected to the limiting mechanism, and the limiting mechanism can be set to limit the rotating mechanism, so that the rotating mechanism can generate stable rotation, and then when the rotating mechanism rotates with the rotating shaft, the rotating shaft can generate stable rotation, and the limiting mechanism comprises a first outer shell, and the first outer shell is fixedly connected to one end of the support rod away from the inner wall of the base, so as to facilitate the addition of lubricating fluid to the inside of the turntable bearing after it has worked for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of turntable bearings, in particular to a composite turntable bearing. Background Art

[0002] The composite slewing bearing is a key component with an important position in the field of mechanical engineering. It is an innovative product that integrates a variety of advanced technologies and design concepts. It is usually composed of an inner ring, an outer ring, rolling elements, a cage, and a sealing device. The characteristics of the composite slewing bearing are its strong load-bearing capacity and multi-directional load bearing capacity. It can simultaneously withstand complex load combinations such as axial, radial and overturning moments, which makes it play an indispensable role in many heavy machinery and equipment. For example, composite slewing bearings can be seen in the rotating mechanism of large cranes, the cutterhead drive system of shield machines, and the yaw and pitch systems of wind turbines. Its design and manufacturing process are extremely delicate and complex. High-precision processing equipment and processes are required to ensure the dimensional accuracy and surface quality of each component. At the same time, the material selection is also very particular, usually using high-strength alloy steel or special wear-resistant materials to ensure the reliability and durability of the bearing in harsh working environments. In addition, in order to meet the needs of different application scenarios, composite slewing bearings also have a variety of installation methods and structural forms. Through continuous technological innovation and optimization, its performance is constantly improving, providing strong support for the efficient and stable operation of modern industry;

[0003] The existing Chinese invention patent publication number CN110873118B proposes a composite thrust tapered roller slewing bearing; it includes an upper ring, a lower ring, a connecting rod, rolling elements, a spacer ring, a top sleeve, a nut, a large-end metal sleeve and a small-end metal sleeve; a number of rolling elements are arranged between the upper ring and the lower ring, the center of the rolling element is provided with a through hole, the connecting rod passes through the through hole, a large-end metal sleeve and a small-end metal sleeve are respectively arranged between the two ends of the rolling element and the connecting rod, the large-end metal sleeve and the small-end metal sleeve are interference fit with the rolling element, and the large-end metal sleeve and the small-end metal sleeve are clearance fit with the connecting rod; the top sleeve is sleeved on the connecting rod, the nut is threadedly connected to one end of the connecting rod, the top sleeve is pressed onto the end of the large-end metal sleeve away from the small-end metal sleeve, and the spacer ring is fixed on the outside of the top sleeve. It has high load-bearing capacity, good wear resistance, strong operating flexibility, long service life, and is convenient for online rapid maintenance;

[0004] After the composite slewing bearing has been working for a long time, the lubricating oil inside the composite slewing bearing will be reduced and the friction will be increased. Summary of the invention

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a composite turntable bearing, including a base, a support rod fixedly connected to the inner wall of the base, the number of the support rods is several, and the several support rods are evenly distributed, and by setting several support rods, a limiting mechanism can be connected so that the limiting mechanism is connected to the inner cavity of the base, so that the limiting mechanism can be tightly connected to the base, the end of the support rod is fixedly connected to the limiting mechanism, and by setting the limiting mechanism, the rotating mechanism can be limited so that the rotating mechanism can produce stable rotation, and then when the rotating mechanism rotates with the rotating shaft, the rotating shaft can produce stable rotation, the limiting mechanism includes a first shell, the first shell is fixedly connected to one end of the support rod away from the inner wall of the base, the top and bottom ends of the first shell are symmetrically fixedly connected to the limiting ring, the side of the limiting ring away from the first shell is fixedly connected to the second shell, and the outer A lubrication mechanism runs through the surface. By setting the first shell and the second shell, the limit ring can be fixed so that the limit ring can be fixedly connected between the first shell and the second shell, and the lubrication mechanism can be fixed so that the lubrication mechanism can be connected to the limit mechanism. By setting the limit ring, the rotating mechanism can be limited so that the rotating mechanism can produce stable rotation. By setting the lubrication mechanism, solid lubricating oil paste can be stored, and lubricating oil can be squeezed to the outer surface of the limit ring, thereby reducing the friction generated by the rotation, so that the rotating mechanism can rotate more smoothly; a rotating mechanism is rotatably connected to the inner cavity of the second shell, and the rotating mechanism includes a rotating cylinder, which is located in the inner cavity of the second shell. By setting the rotating mechanism, it can be connected to the rotating shaft, so that when the rotating shaft rotates, it can rotate together and cooperate with the limit mechanism to achieve the effect of reducing the friction generated by the rotation while keeping the rotation of the rotating shaft more stable.

[0006] Preferably, leakage holes are provided on the upper surface of the limiting ring, and the number of the leakage holes is several and the several leakage holes are evenly distributed. By providing several leakage holes on the outer surface of the limiting ring, the lubricating oil paste squeezed out by the lubrication mechanism can leak through the leakage holes to the side of the limiting ring close to the rotating mechanism, thereby reducing the friction generated when the rotating mechanism rotates.

[0007] Preferably, limiting sleeves are symmetrically installed on the top and bottom of the outer surface of the first shell, the number of the limiting sleeves is several, and the limiting sleeves are evenly distributed. By respectively arranging several limiting sleeves on the top and bottom of the outer surface of the first shell, the sliding ring can be limited so that the sliding ring can produce stable rotation.

[0008] Preferably, there are several lubrication mechanisms, and the several lubrication mechanisms are evenly distributed. The lubrication mechanism includes an oil storage pipe, which is fixedly connected to the outer surface of the first shell. The oil storage pipe runs through the first shell. By setting up several lubrication mechanisms, lubricating oil can be added to different positions of the limit ring, so that the friction of the rotating mechanism at different positions can be reduced.

[0009] Preferably, the oil storage tube is fixedly connected to one end close to the second shell with a double-ended drainage tube, and the end of the double-ended drainage tube is fixedly connected to the inner surface of the limiting ring, and the end of the double-ended drainage tube is aligned with the leakage hole. By providing the double-ended drainage tube, when the solid oil paste in the inner cavity of the oil storage tube is squeezed, the solid oil paste can be discharged through the openings at both ends of the double-ended drainage tube, thereby allowing the solid oil paste to flow to the surface of the limiting ring.

[0010] Preferably, a piston is slidably connected to the inner wall of the oil storage tube, and a sealing ring is fixedly connected to the outer surface of the piston. By setting the piston, it can move in the inner cavity of the oil storage tube, thereby squeezing the solid oil paste in the inner cavity of the oil storage tube. By setting the sealing ring, the sealing performance of the piston and the oil storage tube can be increased. The sealing ring is frictionally matched with the inner wall of the oil storage tube. A pressing rod is fixedly connected to the side of the piston away from the double-head discharge pipe, and the pressing rod extends to the outer surface of the oil storage tube at one end away from the piston. By setting the pressing rod, it is convenient for the operator to press the piston, so that the piston can produce stable movement in the inner cavity of the oil storage tube under the action of the extrusion force.

[0011] Preferably, sliding rings are symmetrically fixedly connected to the top and bottom of the inner cavity of the rotating cylinder, and the sliding rings are slidably connected to the inner cavity of the limiting sleeve. Anti-slip strips are fixedly connected to the inner wall of the rotating cylinder. The number of the anti-slip strips is several, and the several anti-slip strips are evenly distributed. By setting the sliding rings, stable rotation can be generated under the limitation of the limiting sleeve, and thus the rotating cylinder can generate stable rotation. By setting the anti-slip strips, the friction between the rotating cylinder and the rotating shaft can be increased, and thus the rotating cylinder can also rotate when the rotating shaft rotates.

[0012] Preferably, a sliding mechanism is passed through the upper and lower surfaces of the rotating cylinder. By setting the sliding mechanism, when the rotating cylinder rotates, rotation can be generated on the outer surface of the limiting ring, thereby increasing the stability of the rotation of the rotating cylinder. The number of the sliding mechanisms is several, and the several sliding mechanisms are evenly distributed. The sliding mechanism includes a fixed frame, which passes through the surface of the rotating cylinder. A rotating ball is rotatably connected to the inner cavity of the fixed frame. The rotating ball is frictionally matched with the surface of the limiting ring. By setting the fixed frame, the rotating ball can be limited so that the rotating ball can generate stable rotation in its inner cavity. By setting the rotating ball, it can rotate in the inner cavity of the fixed frame when in contact with the limiting ring.

[0013] Preferably, the upper surface of the fixed frame is fixedly connected to a limiting rod, the outer surface of the top end of the limiting rod is slidably connected to a sliding tube, and the top end of the sliding tube is fixedly connected to an extrusion block. By setting the limiting rod, the sliding tube can be limited so that the sliding tube can drive the extrusion block to produce an effect of vertical up and down movement. The lower surface of the extrusion block is fixedly connected to a spring, and the bottom end of the spring is fixedly connected to the top end of the limiting rod. By setting the spring, elastic potential energy can be generated, thereby causing the extrusion block to be subjected to a pulling force, and the outer side surface of the sliding tube is fixedly connected to a connecting rod, and the end of the connecting rod is fixedly connected to a positioning sleeve, the lower surface of the positioning sleeve is frictionally adapted to the outer surface of the rotating ball, and by setting the positioning sleeve, the upper surface of the rotating ball can be squeezed to prevent the rotating ball from detaching from the fixed frame.

[0014] The present invention provides a composite slewing bearing having the following beneficial effects:

[0015] 1. The composite turntable bearing can limit the rotation mechanism by setting a limiting mechanism, so that the rotation mechanism can produce stable rotation, and then when the rotation mechanism rotates together with the rotating shaft, the rotating shaft can produce stable rotation. By setting a first shell and a second shell, the limiting ring can be fixed so that the limiting ring can be fixedly connected between the first shell and the second shell, and the lubricating mechanism can be fixed so that the lubricating mechanism can be connected to the limiting mechanism. By setting a limiting ring, the rotation mechanism can be limited so that the rotation mechanism can produce stable rotation.

[0016] Second, the composite turntable bearing can store solid lubricating oil paste by providing a lubricating mechanism, and can squeeze the lubricating oil to the outer surface of the limit ring, thereby reducing the friction generated by the rotation, so that the rotating mechanism can rotate more smoothly.

[0017] 3. The composite turntable bearing can be connected to the rotating shaft by setting a rotating mechanism, so that when the rotating shaft rotates, they can rotate together and cooperate with the limiting mechanism to achieve the effect of reducing the friction generated by the rotation while keeping the rotating shaft rotating more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the external structure of a composite slewing bearing of the present invention;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of a composite slewing bearing of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the limiting mechanism of the present invention;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the limiting mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the lubrication mechanism of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the rotating mechanism of the present invention;

[0024] Figure 7 It is a schematic diagram of the sliding mechanism structure of the present invention.

[0025] In the figure: 1. base; 2. support rod; 3. limit mechanism; 4. lubrication mechanism; 5. rotating mechanism; 31. first shell; 32. limit ring; 33. second shell; 34. leakage hole; 35. limit sleeve; 41. oil storage pipe; 42. double-head discharge pipe; 43. piston; 44. sealing ring; 45. pressing rod; 51. rotating cylinder; 52. sliding ring; 53. anti-slip strip; 54. sliding mechanism; 541. fixed frame; 542. rotating ball; 543. limit rod; 544. sliding tube; 545. extrusion block; 546. spring; 547. connecting rod; 548. positioning sleeve. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0027] The first embodiment, as Figure 1-Figure 5As shown, the present invention provides a technical solution: a composite turntable bearing, comprising a base 1, a support rod 2 is fixedly connected to the inner wall of the base 1, the number of the support rods 2 is several, and the several support rods 2 are evenly distributed, by setting several support rods 2, a limiting mechanism 3 can be connected, so that the limiting mechanism 3 is connected to the inner cavity of the base 1, so that the limiting mechanism 3 can be tightly connected to the base 1, the end of the support rod 2 is fixedly connected to the limiting mechanism 3, by setting the limiting mechanism 3, a rotating mechanism 5 can be limited, so that the rotating mechanism 5 can generate stable rotation, and then when the rotating mechanism 5 rotates with the rotating shaft, the rotating shaft can generate stable rotation, the limiting mechanism 3 includes a first shell 31, the first shell 31 is fixedly connected to the end of the support rod 2 away from the inner wall of the base 1, the top and bottom ends of the first shell 31 are symmetrically fixedly connected to the limiting ring 32, the side of the limiting ring 32 away from the first shell 31 is fixedly connected to the second shell 33, and the outer surface of the first shell 31 is penetrated by The lubricating mechanism 4 can fix the limiting ring 32 by setting the first shell 31 and the second shell 33, so that the limiting ring 32 can be fixedly connected between the first shell 31 and the second shell 33, and can fix the lubricating mechanism 4 so that the lubricating mechanism 4 can be connected with the limiting mechanism 3. By setting the limiting ring 32, the rotating mechanism 5 can be limited so that the rotating mechanism 5 can generate stable rotation. By setting the lubricating mechanism 4, solid lubricating oil paste can be stored, and lubricating oil can be squeezed to the outer surface of the limiting ring 32, thereby reducing the friction generated by the rotation, so that the rotating mechanism 5 can rotate more smoothly. The inner cavity of the second shell 33 is rotatably connected with the rotating mechanism 5, and the rotating mechanism 5 includes a rotating cylinder 51, which is located in the inner cavity of the second shell 33. By setting the rotating mechanism 5, it can be connected with the rotating shaft, so that when the rotating shaft rotates, it can rotate together, and cooperate with the limiting mechanism 3 to keep the rotation of the rotating shaft more stable while achieving the effect of reducing the friction generated by the rotation.

[0028] A leakage hole 34 is provided on the upper surface of the limit ring 32, and the number of the leakage holes 34 is several and the several leakage holes 34 are evenly distributed. By providing the several leakage holes 34 on the outer surface of the limit ring 32, the lubricating paste squeezed out by the lubricating mechanism 4 can leak through the leakage holes 34 to the side of the limit ring 32 close to the rotating mechanism 5, thereby reducing the friction generated when the rotating mechanism 5 rotates. The top and bottom of the outer surface of the first shell 31 are symmetrically installed with limiting sleeves 35, and the number of the limiting sleeves 35 is several and the several limiting sleeves 35 are evenly distributed. By respectively arranging the several limiting sleeves 35 on the top and bottom of the outer surface of the first shell 31, the sliding ring 52 can be limited, so that the sliding ring 52 can produce stable rotation.

[0029] The number of the lubricating mechanisms 4 is several, and the several lubricating mechanisms 4 are evenly distributed. The lubricating mechanisms 4 include an oil storage pipe 41, which is fixedly connected to the outer surface of the first shell 31. The oil storage pipe 41 runs through the first shell 31. By setting up several lubricating mechanisms 4, lubricating oil can be added to different positions of the limit ring 32, so that the friction of the rotating mechanism 5 at different positions can be reduced. One end of the oil storage pipe 41 close to the second shell 33 is fixedly connected to a double-headed drain pipe 42 The end of the double-ended drainage pipe 42 is fixedly connected to the inner surface of the limiting ring 32, and the end of the double-ended drainage pipe 42 is aligned with the leakage hole 34. By setting the double-ended drainage pipe 42, when the solid ointment in the inner cavity of the oil storage pipe 41 is squeezed, the solid ointment can be discharged through the openings at both ends of the double-ended drainage pipe 42, so that the solid ointment can flow to the surface of the limiting ring 32. The inner wall of the oil storage pipe 41 is slidably connected with a piston 43, and the outer surface of the piston 43 is fixedly connected with a sealing ring 44. By setting the piston 43, it can move in the inner cavity of the oil storage tube 41, so that the solid oil paste in the inner cavity of the oil storage tube 41 can be squeezed. By setting the sealing ring 44, the sealing performance between the piston 43 and the oil storage tube 41 can be increased. The sealing ring 44 is frictionally matched with the inner wall of the oil storage tube 41. The side of the piston 43 away from the double-head discharge tube 42 is fixedly connected with a pressing rod 45. The end of the pressing rod 45 away from the piston 43 extends to the outer surface of the oil storage tube 41. By setting the pressing rod 45, it is convenient to operate The operator presses the piston 43, so that the piston 43 can move stably in the inner cavity of the oil storage tube 41 under the action of the extrusion force. When in use, the operator places the solid ointment in the inner cavity of the oil storage tube 41. After the rotating mechanism 5 rotates for a period of time, the operator pushes the pressing rod 45, so that the piston 43 and the sealing ring 44 at the end of the pressing rod 45 can squeeze the solid ointment in the inner cavity of the oil storage tube 41, and finally the solid ointment can be discharged to the outer surface of the limit ring 32 through the two ends of the double-headed discharge pipe 42.

[0030] The second embodiment, as Figure 6-Figure 7As shown, the top and bottom of the inner cavity of the rotating cylinder 51 are symmetrically fixedly connected with sliding rings 52, and the sliding rings 52 are slidably connected to the inner cavity of the limiting sleeve 35. The inner wall of the rotating cylinder 51 is fixedly connected with anti-slip strips 53. The number of the anti-slip strips 53 is several, and the several anti-slip strips 53 are evenly distributed. By setting the sliding rings 52, stable rotation can be generated under the limit of the limiting sleeve 35, so that the rotating cylinder 51 can generate stable rotation. By setting the anti-slip strips 53, the friction between the rotating cylinder 51 and the rotating shaft can be increased, so that when the rotating shaft rotates, the rotating cylinder 51 also generates rotation. The upper and lower surfaces of the rotating cylinder 51 are penetrated with sliding mechanisms 54. By setting the sliding mechanisms 54, when the rotating cylinder 51 rotates, the outer surface of the limiting ring 32 can rotate, thereby increasing the stability of the rotation of the rotating cylinder 51. The number of the sliding mechanisms 54 is several, and the several sliding mechanisms 54 are evenly distributed. The sliding mechanisms 54 include a fixed frame 541, and the fixed frame 541 penetrates the surface of the rotating cylinder 51. The inner cavity of the fixed frame 541 is rotatably connected with a rotating ball 542. The rotating ball 542 is frictionally matched with the surface of the limiting ring 32. By setting the fixed frame 541, the rotating ball 542 can be limited so that the rotating ball 542 can generate stable rotation in its inner cavity. By setting the rotating ball 542, when it contacts the limiting ring 32, it can rotate in the inner cavity of the fixed frame 541. The upper surface of the fixed frame 541 is fixedly connected with a limiting rod 543. The outer surface of the top of the limiting rod 543 is slidably connected with a sliding tube 544. The top of the sliding tube 544 is fixedly connected with an extrusion block 545. By setting the limiting rod 543, the sliding tube 544 can be limited so that the sliding tube 544 can drive the extrusion block 545 to generate the effect of vertical up and down movement. The lower surface of the extrusion block 545 is fixedly connected with a spring 546, and the bottom end of the spring 546 is fixedly connected to the top end of the limiting rod 543. By setting the spring 546, elastic potential energy can be generated, so that the extrusion block 545 is subjected to a pulling force. The outer side surface of the sliding tube 544 is fixedly connected with a connecting rod 547, and the end of the connecting rod 547 is fixedly connected with a positioning sleeve 548. The lower surface of the positioning sleeve 548 is frictionally matched with the outer surface of the rotating ball 542. By setting the positioning sleeve 548, the upper surface of the rotating ball 542 can be squeezed, thereby preventing the rotating ball 542 from detaching from the fixed frame 541.

[0031] Working principle: The operator inserts the rotating shaft into the inner cavity of the rotating cylinder 51 and makes the anti-slip strip 53 tightly contact with the rotating shaft. When the rotating shaft rotates, the rotating cylinder 51 will drive the sliding ring 52 to rotate in the inner cavity of the limiting sleeve 35. During the rotation, the rotating ball 542 will rotate on the outer surface of the limiting ring 32, thereby making the rotation of the rotating cylinder 51 more stable. The operator places the solid ointment in the inner cavity of the oil storage tube 41. After the rotating mechanism 5 rotates for a period of time, the operator pushes the pressing rod 45, so that the piston 43 and the sealing ring 44 at the end of the pressing rod 45 can squeeze the solid ointment in the inner cavity of the oil storage tube 41, and finally the solid ointment can be discharged to the outer surface of the limiting ring 32 through the two ends of the double-headed discharge pipe 42.

[0032] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A composite turntable bearing, comprising a base (1), characterized in that: A support rod (2) is fixedly connected to the inner wall of the base (1), the number of the support rods (2) is several, and the several support rods (2) are evenly distributed, the end of the support rod (2) is fixedly connected to a limiting mechanism (3), the limiting mechanism (3) comprises a first shell (31), the first shell (31) is fixedly connected to an end of the support rod (2) away from the inner wall of the base (1), the top and bottom ends of the first shell (31) are symmetrically fixedly connected to a limiting ring (32), the side of the limiting ring (32) away from the first shell (31) is fixedly connected to a second shell (33), and the outer surface of the first shell (31) is penetrated by a lubrication mechanism (4); a rotating mechanism (5) is rotatably connected to the inner cavity of the second shell (33), the rotating mechanism (5) comprises a rotating cylinder (51), and the rotating cylinder (51) is located in the inner cavity of the second shell (33); The upper surface of the limiting ring (32) is provided with leakage holes (34), the number of the leakage holes (34) is a plurality, and the plurality of leakage holes (34) are evenly distributed; The top and bottom of the outer surface of the first shell (31) are symmetrically mounted with limiting sleeves (35), the number of the limiting sleeves (35) being several and the several limiting sleeves (35) being evenly distributed; The number of the lubricating mechanisms (4) is several, and the several lubricating mechanisms (4) are evenly distributed, the lubricating mechanisms (4) include an oil storage pipe (41), the oil storage pipe (41) is fixedly connected to the outer surface of the first shell (31), and the oil storage pipe (41) passes through the first shell (31); One end of the oil storage pipe (41) close to the second housing (33) is fixedly connected to a double-ended liquid discharge pipe (42), the end of the double-ended liquid discharge pipe (42) is fixedly connected to the inner surface of the limiting ring (32), and the end of the double-ended liquid discharge pipe (42) is aligned with the liquid leakage hole (34); A piston (43) is slidably connected to the inner wall of the oil storage pipe (41), a sealing ring (44) is fixedly connected to the outer surface of the piston (43), the sealing ring (44) is frictionally matched with the inner wall of the oil storage pipe (41), a pressing rod (45) is fixedly connected to the side of the piston (43) away from the double-headed liquid discharge pipe (42), and the end of the pressing rod (45) away from the piston (43) extends to the outer surface of the oil storage pipe (41); The top and bottom of the inner cavity of the rotating cylinder (51) are symmetrically fixedly connected with sliding rings (52), and the sliding rings (52) are slidably connected to the inner cavity of the limiting sleeve (35). The inner wall of the rotating cylinder (51) is fixedly connected with anti-slip strips (53), and the number of the anti-slip strips (53) is multiple, and the multiple anti-slip strips (53) are evenly distributed.

2. A composite turntable bearing according to claim 1, characterized in that: The upper surface and the lower surface of the rotating cylinder (51) are penetrated by sliding mechanisms (54), the number of the sliding mechanisms (54) is multiple, and the multiple sliding mechanisms (54) are evenly distributed, the sliding mechanisms (54) include a fixed frame (541), the fixed frame (541) penetrates the surface of the rotating cylinder (51), a rotating ball (542) is rotatably connected at the inner cavity of the fixed frame (541), and the rotating ball (542) is frictionally matched with the surface of the limit ring (32).

3. A composite turntable bearing according to claim 2, characterized in that: The upper surface of the fixed frame (541) is fixedly connected to a limiting rod (543); the outer surface of the top end of the limiting rod (543) is slidably connected to a sliding tube (544); the top end of the sliding tube (544) is fixedly connected to an extrusion block (545); the lower surface of the extrusion block (545) is fixedly connected to a spring (546); the bottom end of the spring (546) is fixedly connected to the top end of the limiting rod (543); the outer side surface of the sliding tube (544) is fixedly connected to a connecting rod (547); the end of the connecting rod (547) is fixedly connected to a positioning sleeve (548); the lower surface of the positioning sleeve (548) is frictionally matched with the outer surface of the rotating ball (542).

Images