High-speed direct-drive medical CT machine bearings

Abstract

The present invention discloses a bearing for a high-speed direct-drive medical CT machine, specifically relating to the technical field of bearings, including an inner bearing ring. An outer bearing ring is installed on the outside of the inner bearing ring, and a bottom outer ring is installed at the bottom of the outer bearing ring. A sealed gap is formed between the inner bearing ring, the outer bearing ring, and the bottom outer ring. A double-row ball rotating mechanism is arranged between the inner bearing ring and the outer bearing ring. By setting the double-row ball rotating mechanism and the lubricating mechanism in the present invention, lubricating oil is stored and slowly released, ensuring the lubrication effect of the bearing during long-term operation. The double-row balls bear greater radial and axial forces, preventing the bearing from deforming or being damaged due to overload, ensuring that the CT machine can operate normally under heavy-duty conditions, better adapting to complex working condition changes, reducing the radial runout and axial play of the scanning frame, enabling the detector and the X-ray tube to maintain high-precision alignment during rotation, and thus generating clearer and more accurate medical images.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and more specifically, to a high-speed direct-drive medical CT machine bearing. Background Art

[0002] In the medical field, high-speed direct-drive medical CT machines are an important diagnostic equipment, and the bearings of the CT machines are crucial to their performance and reliability. With the continuous development of medical technology, higher and higher requirements are placed on the imaging quality, scanning speed and stability of CT machines, which also places higher requirements on the bearings of CT machines.

[0003] Traditional medical CT machine bearings need to adapt to various working conditions such as temperature changes and vibration interference. When dealing with these complex situations, single-row ball bearings may have problems such as poor lubrication and impurity contamination, resulting in frequent bearing failures, increasing equipment maintenance costs and downtime, and affecting the working efficiency of the CT machine. At the same time, there are certain limitations when facing high-speed rotation and heavy-load conditions. The bearing's load-bearing capacity is relatively limited. When subjected to large radial and axial forces, the bearing is prone to deformation or damage, affecting the normal operation of the CT machine. The ball has poor stability during rotation, which may cause large radial runout and axial movement of the scanning frame, affecting the alignment accuracy of the detector and the X-ray tube, thereby reducing the imaging quality. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-speed direct-drive medical CT machine bearing to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a high-speed direct-drive medical CT machine bearing, comprising a bearing inner ring, a bearing outer ring is installed outside the bearing inner ring, a bottom outer ring is installed at the bottom of the bearing outer ring, a sealed gap is formed between the bearing inner ring, the bearing outer ring and the bottom outer ring, and a double-row ball rotation mechanism is arranged between the bearing inner ring and the bearing outer ring;

[0006] The double-row ball rotation mechanism includes a bearing clearance, which is provided on the surface of the inner ring of the bearing and one side of the outer ring of the bearing. A retaining frame is installed inside the bearing clearance, and the retaining frame is fixedly connected to the inner ring of the bearing. Bearing balls are installed on one side of the retaining frame, and a reinforcement ring is fixedly connected to the other side of the retaining frame. A raceway plate is provided on one side of the bearing balls, and a sealing plate is fixedly connected to one side of the raceway plate. A lubrication mechanism is provided between the outer ring of the bearing and the raceway plate.

[0007] Preferably, the lubrication mechanism comprises an oil storage tank, the oil storage tank is opened inside the outer ring of the bearing, an oil supply hole is opened on one side surface of the inner wall of the oil storage tank, and the oil supply hole is arranged on one side surface of the outer ring of the bearing.

[0008] Preferably, a sealing piston is movably clamped inside the oil replenishing hole, a first oil hole is formed on one side surface of the inner wall of the oil storage tank, and an oil core is fixedly installed inside the first oil hole.

[0009] Preferably, a grease retainer is fixedly installed on one side of the raceway plate. The grease retainer is located on top of the bearing balls. Second oil holes are formed on one side surfaces of the sealing plate, the raceway plate and the grease retainer.

[0010] Preferably, the cross-sectional shape of the raceway plate is L-shaped, and the number of the reinforcing rings and the raceway plates is two.

[0011] Preferably, an annular groove is formed inside the outer ring at the bottom, a stop ring is installed inside the annular groove, and the annular groove and the stop ring are matched with each other.

[0012] Preferably, a raceway gap is formed between the cage and the raceway plate.

[0013] Preferably, the bottom of the oil storage tank is inclined, the inclination angle is 5° to 10°, and the lower end is close to the first oil hole.

[0014] Preferably, the sealing piston is made of oil-resistant rubber.

[0015] The technical effects and advantages of the present invention:

[0016] 1. By setting up a double-row ball rotation mechanism and a lubrication mechanism, the lubrication system composed of an oil storage tank, an oil core, and a grease retainer can provide continuous and stable lubrication for the bearing. The inclined design at the bottom of the oil storage tank and the capillary action of the oil core ensure that the lubricating oil can be smoothly delivered to the parts that need lubrication. The grease retainer can store a certain amount of lubricating oil and release it slowly, ensuring the lubrication effect of the bearing during long-term operation. Sealing structures such as a sealing plate, a sealing gap, and a sealing piston effectively prevent the leakage of lubricating oil and the entry of external impurities into the bearing interior, reducing bearing failures caused by poor lubrication and impurity contamination, extending the maintenance cycle of the bearing. At the same time, the double-row ball structure can effectively share these loads. Compared with a single-row ball bearing, it can withstand greater radial and axial forces, enabling the bearing to stably support components such as the scanning frame, avoiding bearing deformation or damage caused by overload, ensuring that the CT machine can also work normally under heavy-duty conditions, providing more reliable support for the equipment, preventing serious safety accidents such as the falling of the scanning frame caused by bearing failures, and guaranteeing the safety of medical staff and patients. The double-row ball bearing is more stable during rotation. The cooperation of the two rows of balls can better keep the rotation center position of the shaft unchanged. With its good stability and load-bearing capacity, the double-row ball bearing can better adapt to these complex working condition changes, helping to reduce the radial runout and axial movement of the scanning frame, enabling the detector and the X-ray tube to maintain high-precision alignment during rotation, thereby generating clearer and more accurate medical images, providing a more reliable basis for disease diagnosis, being able to better cope with the centrifugal force and axial force generated by high-speed rotation, ensuring the stability of the bearing during long-term high-speed heavy-duty operation, reducing the number of maintenance times, and improving the working efficiency of the CT machine;

[0017] 2. The sealing gap between the inner ring of the bearing, the outer ring of the bearing, and the bottom outer ring provides space for the thermal expansion and contraction of the bearing during operation due to temperature changes. This enables the bearing to maintain stable performance at different working temperatures, avoiding problems such as bearing seizure or excessive wear caused by temperature changes, and improving the adaptability of the CT machine under various environmental conditions. The reinforcement ring enhances the structural strength of the cage, enabling it to stably guide the bearing balls to roll during high-speed rotation. At the same time, the L-shaped design of the raceway plate and its close fit with the bearing balls, together with the buffering effect of the raceway gap, jointly ensure the stable operation of the bearing under various working conditions, reducing the risk of wear and damage to the internal parts of the bearing, increasing the service life of the bearing, and thus enhancing the reliability of the entire CT machine equipment;

[0018] 3. The annular groove and the retaining ring inside the outer ring at the bottom can limit the axial movement of the internal parts of the bearing, ensuring the stability of the bearing during operation. This is particularly important for high-speed direct-drive medical CT machines because axial instability may cause the scanning frame to shift, affecting the imaging quality and even damaging the equipment. The presence of the retaining ring effectively prevents this situation from occurring, improving the safety and stability of the equipment. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic sectional view of the present invention.

[0021] Figure 3 It is a schematic diagram of the outer structure of the cage of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the inner ring of the bearing and the sealing plate of the present invention.

[0023] Figure 5 For the present invention Figure 2 The enlarged schematic diagram at position A.

[0024] Figure 6 It is a schematic diagram of the structure at the connection of the inner ring of the bearing, the outer ring of the bearing and the outer ring at the bottom of the present invention.

[0025] Figure 7 For the present invention Figure 6 The enlarged schematic diagram at position B.

[0026] The reference numerals are: 1, inner ring of the bearing; 2, outer ring of the bearing; 3, outer ring at the bottom; 4, sealing gap; 5, bearing clearance; 6, cage; 7, bearing ball; 8, reinforcement ring; 9, raceway plate; 10, sealing plate; 11, oil storage tank; 12, oil replenishing hole; 13, sealing piston; 14, first oil hole; 15, wick; 16, annular groove; 17, retaining ring; 18, second oil hole; 19, grease retainer; 20, raceway clearance. Detailed Embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] As shown in the attached Figures 1-7The high-speed direct-drive medical CT machine bearing shown in the figure comprises a bearing inner ring 1, a bearing outer ring 2 is mounted on the outer side of the bearing inner ring 1, a bottom outer ring 3 is mounted on the bottom of the bearing outer ring 2, a sealing gap 4 is formed between the bearing inner ring 1, the bearing outer ring 2 and the bottom outer ring 3, and a double-row ball rotation mechanism is arranged between the bearing inner ring 1 and the bearing outer ring 2;

[0029] The double-row ball rotation mechanism includes a bearing clearance 5, which is provided on the surface of the bearing inner ring 1 and one side of the bearing outer ring 2. A retainer 6 is installed inside the bearing clearance 5, and the retainer 6 is fixedly connected to the bearing inner ring 1. Bearing balls 7 are installed on one side of the retainer 6, and a reinforcement ring 8 is fixedly connected to the other side of the retainer 6. A raceway plate 9 is provided on one side of the bearing balls 7, and a sealing plate 10 is fixedly connected to one side of the raceway plate 9. A lubrication mechanism is provided between the bearing outer ring 2 and the raceway plate 9.

[0030] As attached Figure 6 , 7 As shown, the lubrication mechanism includes an oil storage tank 11, which is opened inside the bearing outer ring 2. An oil filling hole 12 is opened on one side of the inner wall of the oil storage tank 11. The oil filling hole 12 is arranged on one side of the bearing outer ring 2. The oil storage tank 11 is arranged inside the bearing outer ring 2 without occupying additional space, making the bearing structure more compact. At the same time, a certain amount of lubricating oil can be stored in the space of the bearing outer ring 2 to provide guarantee for the continuous lubrication of the bearing. The setting of the oil filling hole 12 is convenient for replenishing lubricating oil into the oil storage tank 11 when needed to ensure that the bearing is always sufficiently lubricated.

[0031] As attached Figure 6 , 7 As shown, a sealing piston 13 is movably connected inside the oil filling hole 12, a first oil hole 14 is opened on one side of the inner wall of the oil storage tank 11, and an oil core 15 is fixedly installed inside the first oil hole 14. When oil replenishment is not needed, the sealing piston 13 can effectively prevent the lubricating oil in the oil storage tank 11 from leaking, thereby ensuring the sealing of the lubrication system. At the same time, the movable clamping method facilitates opening and closing of the oil filling hole 12, and the oil core 15 installed through the first oil hole 14 can use capillary action to slowly transport the lubricating oil in the oil storage tank 11 to the part that needs lubrication, thereby achieving a continuous and stable lubrication effect.

[0032] As attached Figure 6 , 7As shown, an oil retainer 19 is fixedly installed on one side of the raceway plate 9. The oil retainer 19 is located on top of the bearing balls 7. Second oil holes 18 are provided on the one side surfaces of the sealing plate 10, the raceway plate 9, and the oil retainer 19. The oil retainer 19 can store a certain amount of lubricating oil and slowly release it during the operation of the bearing, providing additional lubrication protection for the bearing balls 7 and the raceway plate 9. The second oil holes 18 can replenish the lubricating oil for the oil retainer 19 to ensure that the oil retainer 19 always has an adequate supply of lubricating medium.

[0033] As shown in Figure 2 , 5 , 6, and 7, the cross-sectional shape of the raceway plate 9 is set to an L shape. The number of the reinforcing rings 8 and the raceway plates 9 is both set to two. The L shape can better cooperate with the bearing balls 7 to provide a stable rolling track for the balls. At the same time, the L-shaped design can also increase the strength and stiffness of the raceway plate 9, improving the load-bearing capacity of the bearing. The two reinforcing rings 8 and the raceway plates 9 increase the structural stability of the bearing, enabling it to better withstand radial and axial loads and improving the reliability of the bearing.

[0034] As shown in Figure 2 , 6 , an annular groove 16 is provided inside the bottom outer ring 3. A retaining ring 17 is installed inside the annular groove 16. The annular groove 16 and the retaining ring 17 are matched with each other. The retaining ring 17 installed in the annular groove 16 can limit the axial movement of the internal parts of the bearing, ensuring the stability of the bearing during operation and preventing bearing damage caused by axial movement, thereby increasing the service life of the bearing.

[0035] As shown in Figure 5 , a raceway clearance 20 is formed between the cage 6 and the raceway plate 9. The raceway clearance 20 provides a certain amount of movement space for the rolling of the bearing balls 7, acting as a buffer when the bearing is subjected to impact or thermal expansion and contraction, reducing the risk of wear and damage to the internal parts of the bearing.

[0036] As shown in Figure 6 , 7 , the bottom of the oil storage tank 11 is inclined, with an inclination angle of 5° to 10°, and the lower end is close to the first oil hole 14. The inclined design of the bottom of the oil storage tank 11 makes it easier for the lubricating oil to flow towards the first oil hole 14 under the action of gravity, ensuring that the wick 15 can continuously obtain the lubricating oil, thereby improving the efficiency and reliability of the lubrication system.

[0037] As shown in Figure 6 , 7 , the sealing piston 13 is made of oil-resistant rubber. The oil-resistant rubber sealing piston 13 has good sealing performance and oil resistance, can effectively prevent the leakage of lubricating oil, and is not easily aged and damaged during long-term use, ensuring the durability of the sealing performance.

[0038] Working principle of the present invention: During the use of the high-speed direct-drive medical CT machine bearing provided by the present invention, when the scanning frame of the direct-drive medical CT machine rotates, the rotating mechanism of the bearing starts to work. The bearing balls 7 roll on the raceway plate 9, enabling the inner ring to rotate smoothly relative to the outer ring, thereby driving the scanning frame to achieve high-speed rotation and meeting the requirement of rapid imaging of the CT machine. When the inner ring 1 of the bearing rotates, it drives the cage 6 fixedly connected thereto to rotate. The bearing balls 7 on the cage 6 roll within the space between the inner ring 1 and the outer ring 2 of the bearing, realizing the rotation function of the bearing. The reinforcement ring 8 is fixed on the other side of the cage 6, playing a role in enhancing the structural strength of the cage 6 to ensure that the cage 6 can stably guide the bearing balls 7 to roll during high-speed rotation. The raceway plate 9 provides a rolling track for the bearing balls 7, and its cross-sectional shape is L-shaped, closely cooperating with the bearing balls 7. The raceway gap 20 formed between the cage 6 and the raceway plate 9 provides a certain movement space for the rolling of the bearing balls 7, and also plays a buffering role when the bearing is impacted or undergoes thermal expansion and contraction. The sealing plate 10 is fixed on one side of the raceway plate 9 and acts together with the raceway plate 9 to prevent external impurities from entering the bearing interior and protect the bearing balls 7 and other internal structures;

[0039] The oil storage groove 11 is opened inside the outer ring 2 of the bearing for storing lubricating oil. The bottom of the oil storage groove 11 is inclined at an angle of 5° to 10°, and the lower end is close to the first oil hole 14. Such a design makes it easier for the lubricating oil to flow towards the first oil hole 14 under the action of gravity. The oil replenishing hole 12 is provided on one side surface of the outer ring 2 of the bearing. When lubricating oil needs to be replenished, lubricating oil can be injected into the oil storage groove 11 through the oil replenishing hole 12. A sealing piston 13 is movably clamped inside the oil replenishing hole 12. The sealing piston 13 is made of oil-resistant rubber and can effectively prevent the leakage of the lubricating oil in the oil storage groove 11 when oil replenishment is not required. The first oil hole 14 is opened on one side surface of the inner wall of the oil storage groove 11, and an oil core 15 is fixedly installed inside. The oil core 15 can slowly transport the lubricating oil in the oil storage groove 11 to the parts that need lubrication through capillary action. An oil retainer 19 is fixedly installed on one side of the raceway plate 9. The oil retainer 19 is located on top of the bearing balls 7. The second oil hole 18 is opened on one side surfaces of the sealing plate 10, the raceway plate 9 and the oil retainer 19. The second oil hole 18 is used to replenish lubricating oil for the oil retainer 19. The oil retainer 19 can store a certain amount of lubricating oil and slowly release the lubricating oil during the operation of the bearing to provide continuous lubrication for the bearing balls 7 and the raceway plate 9;

[0040] The sealed gap 4 formed between the inner ring 1 of the bearing, the outer ring 2 of the bearing, and the bottom outer ring 3 can, on the one hand, provide a certain space for the thermal expansion and contraction of the bearing during operation due to temperature changes, and on the other hand, also play a certain sealing role to prevent external impurities from directly entering the bearing interior. An annular groove 16 is provided inside the bottom outer ring 3, and a retaining ring 17 is installed inside the annular groove 16. The retaining ring 17 can limit the axial movement of the internal parts of the bearing and ensure the stability of the bearing during operation.

[0041] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected. The terms "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change.

[0042] Second, in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0043] Finally, the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-speed direct-drive medical CT machine bearing, comprising a bearing inner ring (1), characterized in that: A bearing outer ring (2) is mounted on the outer side of the bearing inner ring (1), a bottom outer ring (3) is mounted on the bottom of the bearing outer ring (2), a sealing gap (4) is formed between the bearing inner ring (1), the bearing outer ring (2) and the bottom outer ring (3), and a double-row ball rolling mechanism is arranged between the bearing inner ring (1) and the bearing outer ring (2); The double-row ball rotation mechanism comprises a bearing clearance (5), wherein the bearing clearance (5) is provided on the surface of one side of the bearing inner ring (1) and the bearing outer ring (2), a retainer (6) is installed inside the bearing clearance (5), the retainer (6) is fixedly connected to the bearing inner ring (1), a bearing ball (7) is installed on one side of the retainer (6), a reinforcement ring (8) is fixedly connected to the other side of the retainer (6), a raceway plate (9) is provided on one side of the bearing ball (7), a sealing plate (10) is fixedly connected to one side of the raceway plate (9), the cross-sectional shape of the raceway plate (9) is set to be L-shaped, the number of the reinforcement ring (8) and the raceway plate (9) are both set to two, and a lubrication mechanism is provided between the bearing outer ring (2) and the raceway plate (9); The lubrication mechanism comprises an oil storage tank (11), the oil storage tank (11) is arranged inside the bearing outer ring (2), an oil supply hole (12) is arranged on one side surface of the inner wall of the oil storage tank (11), the oil supply hole (12) is arranged on one side surface of the bearing outer ring (2), a sealing piston (13) is movably engaged inside the oil supply hole (12), a first oil hole (14) is arranged on one side surface of the inner wall of the oil storage tank (11), an oil core (15) is fixedly installed inside the first oil hole (14), a grease retainer (19) is fixedly installed on one side of the raceway plate (9), the grease retainer (19) is located on the top of the bearing ball (7), and a second oil hole (18) is arranged on one side surface of the sealing plate (10), the raceway plate (9) and the grease retainer (19).

2. The high-speed direct-drive medical CT machine bearing according to claim 1, characterized in that: An annular groove (16) is provided inside the bottom outer ring (3), a stop ring (17) is installed inside the annular groove (16), and the annular groove (16) and the stop ring (17) match each other.

3. The high-speed direct-drive medical CT machine bearing according to claim 1, characterized in that: A raceway gap (20) is formed between the retaining frame (6) and the raceway plate (9).

4. The high-speed direct-drive medical CT machine bearing according to claim 1, characterized in that: The bottom of the oil storage tank (11) is inclined at an angle of 5° to 10°, and the lower end is close to the first oil hole (14).

5. The high-speed direct-drive medical CT machine bearing according to claim 1, characterized in that: The sealing piston (13) is made of oil-resistant rubber material.

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