Novel structure precision bearing for CT (computed tomography) machine without blocking holes

Abstract

The invention discloses a novel-structure precision bearing for a CT machine without blocking holes. The novel-structure precision bearing comprises an outer ring, an inner ring, steel balls, sealing rings and a retainer. The opposite side walls of the outer ring and the inner ring are provided with raceways, the retainer is arranged in the raceway between the outer ring and the inner ring, and the steel balls are positioned in the raceways and are arranged in the retainer in a rolling manner; the sealing ring is divided into an upper seal and a lower seal, the cross section of the upper seal and the cross section of the lower seal are linear, the upper seal is connected to the inner wall of the outer ring and seals the upper portion of the roller path, and the lower seal is connected to the outer wall of the inner ring and seals the lower portion of the roller path; an oil injection hole is formed in the inner ring, an oil cup is arranged on the oil injection hole, the oil cup is filled with lubricating oil, and the lubricating oil is attached to the steel balls through the oil injection hole. The contact surface of the raceway and the steel balls is increased, no hole is blocked, the operation stability of the bearing is improved, and noise is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical treatment and industrial flaw detection CT machine equipment, in particular to a new type of structural precision bearing for a CT machine without blocked holes. Background Art

[0002] There are two types of bearings for medical and industrial flaw detection CT machines under the existing technology. One is a structure that uses a combination of steel wire and steel ball to rotate, and the other is a structure that uses four-point contact steel ball to rotate. However, as the requirements for medical CT machines become higher and higher, the speed of medical CT is also getting higher and higher. The accuracy and structure of the existing inlaid steel wire ensure the use of high-speed medical CT machine bearings, but the price is high, which is not conducive to the popularization of low-end and medium-end CT machines. A high-speed, high-strength, long-life and cost-effective precision bearing will greatly promote the development and popularization of low-end and medium-end medical and industrial flaw detection CT machines. Summary of the invention

[0003] The purpose of the present invention is to provide a new type of precision bearing for CT machine with no blocked holes, increase the contact surface between the raceway and the steel ball, improve the running stability of the bearing and reduce noise.

[0004] The present invention mainly provides a new type of structural precision bearing for CT machine without blocked holes, including an outer ring, an inner ring, a steel ball, a sealing ring and a retaining frame;

[0005] The outer ring and the inner ring are provided with raceways on the opposite side walls, the retaining frame is placed in the raceway between the outer ring and the inner ring, and the steel balls are located in the raceway and are rolled in the retaining frame;

[0006] The sealing ring is divided into an upper seal and a lower seal, and the cross-sections of the upper seal and the lower seal are both "I"-shaped. The upper seal is connected to the inner wall of the outer ring to seal the upper part of the raceway, and the lower seal is connected to the outer wall of the inner ring to seal the lower part of the raceway;

[0007] The inner ring is provided with an oil filling hole, the oil filling hole is provided with an oil cup, the oil cup is filled with lubricating oil, and the lubricating oil adheres to the steel ball through the oil filling hole.

[0008] Further technology of the present invention:

[0009] Preferably, the roundness of the inner and outer ring raceways is ≤0.05mm, the flatness of the inner and outer ring surfaces is ≤0.05mm, the axial and radial clearances of the raceways are ≤0.05mm, the roughness of the raceways is ≤0.8μm, and the quenching hardness of the raceways is 55-63HRC.

[0010] Preferably, the retaining frame is provided with a receiving groove and a dividing groove, and the receiving groove and the dividing groove are on the same side and are arranged at intervals.

[0011] Preferably, a flange structure is provided on the inner wall of the slot of the accommodating slot to form a bayonet, and the bayonet is in a trumpet shape.

[0012] Preferably, the tip of the flange structure is provided with a rounded corner for transition.

[0013] The beneficial effects of the present invention are:

[0014] The present invention increases the contact area between the raceway and the steel ball through the special installation and structural design of the outer ring, inner ring, sealing ring, steel ball and retaining frame, without blocking holes, improving the operation stability of the bearing and reducing noise. The retaining frame ensures the operation and rotation of the steel ball. The up and down I-shaped seals ensure the preservation of grease and prevent oil leakage under high-speed operation of the bearing. The new structure improves the vibration of the CT machine bearing and avoids abnormal noise, thereby ensuring the overall accuracy of the bearing and achieving better use effect.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 To show the structural intent of the cage;

[0018] In the figure: 1. outer ring; 2. inner ring; 3. steel ball; 4. upper seal; 5. lower seal; 6. retaining frame; 61. receiving groove; 62. dividing groove; 63. flange structure; 7. oil filling hole; 8. oil cup. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be further described in detail below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention but not all. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 In this embodiment, a new type of structural precision bearing for a CT machine without blocked holes is provided, including an outer ring 1, an inner ring 2, a steel ball 3, a sealing ring and a retaining frame 6;

[0021] The outer ring 1 and the inner ring 2 have opposite side walls with raceways, the retainer 6 is placed in the raceway between the outer ring 1 and the inner ring 2, and the steel balls 3 are located in the raceway and are rolled in the retainer 6;

[0022] The sealing ring is divided into an upper seal 4 and a lower seal 5. The cross-sections of the upper seal 4 and the lower seal 5 are both "I"-shaped. The upper seal 4 is connected to the inner wall of the outer ring 1 to seal the upper part of the raceway, and the lower seal 5 is connected to the outer wall of the inner ring 2 to seal the lower part of the raceway.

[0023] The inner ring 2 is provided with an oil filling hole 7 , and the oil filling hole 7 is provided with an oil cup 8 . The oil cup 8 is filled with lubricating oil, and the lubricating oil adheres to the steel ball 3 through the oil filling hole 7 .

[0024] like Figure 2 The retaining frame 6 is provided with a receiving groove 61 and a dividing groove 62, and the receiving groove 61 and the dividing groove 62 are on the same side and are spaced apart.

[0025] The inner wall of the slot of the receiving slot 61 is provided with a flange structure 63 to form a bayonet, which is in a trumpet shape, so as to facilitate the steel ball 3 to be clamped into the receiving slot 61 .

[0026] The tip of the flange structure 63 is provided with a rounded corner for transition.

[0027] It should be noted that in the above structure, the roundness of the inner and outer ring raceways is ≤0.05mm, and the raceway contact can achieve more than 95% contact (at the contact angle), avoiding excessive noise and abnormal sound.

[0028] The flatness of the inner and outer ring surfaces is ≤0.05mm, and the raceway contact can achieve more than 95% contact (at the contact angle), avoiding excessive noise and abnormal sound.

[0029] The axial and radial clearances of the raceways are ≤0.05mm, and the raceway contact can achieve more than 95% contact (at the contact angle), avoiding excessive noise and abnormal sound.

[0030] The raceway roughness is ≤0.8μm, which ensures that the noise level is within 65dB at medium and high speeds of 60-120prm.

[0031] The raceway quenching hardness is 55-63HRC, there is no blocked hole (for installing steel ball 3), which can well ensure that the noise is within 65dB at medium and high speeds of 60-120prm.

[0032] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A new type of precision bearing for CT machine without blocked holes, characterized in that: Including outer ring, inner ring, steel ball, sealing ring and retainer; The outer ring and the inner ring are provided with raceways on the opposite side walls, the retaining frame is placed in the raceway between the outer ring and the inner ring, and the steel balls are located in the raceway and are rolled in the retaining frame; The sealing ring is divided into an upper seal and a lower seal, and the cross-sections of the upper seal and the lower seal are both "I"-shaped. The upper seal is connected to the inner wall of the outer ring to seal the upper part of the raceway, and the lower seal is connected to the outer wall of the inner ring to seal the lower part of the raceway; The inner ring is provided with an oil filling hole, the oil filling hole is provided with an oil cup, the oil cup is filled with lubricating oil, and the lubricating oil adheres to the steel ball through the oil filling hole.

2. The novel structure precision bearing for CT machine without blocked holes according to claim 1 is characterized in that: The roundness of the inner and outer ring raceways is ≤0.05mm, the flatness of the inner and outer ring surfaces is ≤0.05mm, the axial and radial clearance of the raceways is ≤0.05mm, the roughness of the raceways is ≤0.8μm and the quenching hardness of the raceways is 55-63HRC.

3. The novel structure precision bearing for CT machine without blocked holes according to claim 1, characterized in that: The retaining frame is provided with a receiving groove and a dividing groove, and the receiving groove and the dividing groove are on the same side and are arranged at intervals.

4. The novel structure precision bearing for CT machine without blocked holes according to claim 3 is characterized in that: The inner wall of the slot of the receiving slot is provided with a flange structure to form a bayonet, and the bayonet is in a trumpet shape.

5. The novel structure precision bearing for CT machine without blocked holes according to claim 4 is characterized in that: The tip of the flange structure is provided with a rounded corner for transition.

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