Transmission device, X-ray collimator and mobile C-arm X-ray detection equipment

Abstract

The present invention provides a transmission device, an X-ray collimator and an X-ray detection device. The collimator includes, from top to bottom, a rotating top cover, a first rotating gasket ring, a first transmission gear, a second rotating gasket ring, a second transmission gear, a third rotating gasket ring, a third transmission gear and a lead blade layer; the rotating top cover, the first rotating gasket ring, the first transmission gear, the second rotating gasket ring, the second transmission gear, the third rotating gasket ring and the third transmission gear are all hollow and coaxial to jointly define an X-ray exit channel; the lead blade layer includes a first lead blade and a second lead blade, the first lead blade is connected to the first transmission gear, and the second lead blade is connected to the second transmission gear; a 3400A antifriction coating is provided on the upper surface of at least one of the first transmission gear, the second transmission gear and the third transmission gear. The present invention can effectively reduce the friction coefficient between gears, reduce equipment wear, improve the control accuracy of the collimator, extend the service life of the equipment in an oil-free environment, and reduce costs.

Description

Technical Field

[0001] The present invention relates to the technical field of medical diagnostic and therapeutic equipment, and particularly to a transmission device, an X-ray collimator and a mobile C-arm X-ray detection device. Background Art

[0002] X-ray diagnostic technology is the earliest non-invasive visceral examination technology applied in the world. When X-rays pass through the human body, the absorption degrees of different parts are different. For example, the amount of X-rays absorbed by bones is more than that absorbed by muscles. Therefore, the amount of X-rays in different parts of the body is different after passing through the human body. These different amounts of X-rays carry the density distribution information of various parts of the human body, and there are significant differences in the fluorescence effect or photosensitive effect caused on the fluorescent screen or photographic film. Therefore, on the fluorescent screen or photographic film (after developing and fixing), shadows of different densities will be displayed. According to the contrast of the shadow shades, combined with clinical manifestations, test results and pathological diagnosis, it can be judged whether a certain part of the human body is normal. With the continuous improvement of the medical diagnosis level and the increasing attention of people to health, the application of X-ray diagnostic technology is becoming more and more extensive.

[0003] A mobile C-arm X-ray detection device is a commonly used X-ray diagnostic device (English name: MOBILE C-ARM X-RAY TV SYSTEM). This product is suitable for monitoring X-ray fluoroscopy and direct X-ray photography in the operating room. The X-ray collimator is an important part of this system. By restricting the passing range of X-rays through the X-ray collimator, the harm of redundant X-rays to the human body can be avoided. Since the X-ray collimator of the mobile C-arm X-ray detection device is an in-built product and moves frequently, the requirements for its transmission device are relatively high. However, the transmission device of the X-ray collimator of the existing mobile C-arm X-ray detection device has relatively large wear caused by friction between components, resulting in frequent failures such as the transmission position shifting or even being completely unable to be transmitted to the predetermined position, making the X-ray collimator unable to accurately limit the X-ray exit window. Moreover, the transmission device usually uses lubricating oil for lubrication and maintenance, which easily causes pollution of the X-ray collimator, and the costs of equipment maintenance and the like remain high. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a transmission device, an X-ray collimator and a mobile C-arm X-ray detection device, which are used to solve the problems that the transmission device of the X-ray collimator of the existing mobile C-arm X-ray detection device has relatively large wear caused by friction between components, resulting in frequent failures such as the transmission position shifting or even being completely unable to be transmitted to the predetermined position, making the X-ray collimator unable to accurately limit the X-ray exit window, and the transmission device usually uses lubricating oil for lubrication and maintenance, which easily causes pollution of the X-ray collimator, and the costs of equipment maintenance and the like remain high.

[0005] To achieve the above and other related objectives, the present invention provides a transmission device, which includes a plurality of transmission gears stacked vertically, a rotating gasket, and a motor for driving the transmission gears. The rotating gasket is correspondingly arranged between every two of the transmission gears. The motor is connected to the transmission gears, and a 3400A antifriction coating is provided on the upper surface of the transmission gears.

[0006] The present invention also provides an X-ray collimator, which includes a rotating top cover, a first rotating gasket, a first transmission gear, a second rotating gasket, a second transmission gear, a third rotating gasket, a third transmission gear, and a lead blade layer from top to bottom. The rotating top cover, the first rotating gasket, the first transmission gear, the second rotating gasket, the second transmission gear, the third rotating gasket, and the third transmission gear are all hollow and coaxial to jointly define an X-ray exit channel. The lead blade layer includes a first lead blade and a second lead blade. The first lead blade is connected to the first transmission gear through a first connecting member, and the second lead blade is connected to the second transmission gear through a second connecting member, and is used to change the positions of the first lead blade and / or the second lead blade under the drive of the first transmission gear and / or the second transmission gear, thereby changing the size of the X-ray exit channel. The upper surface of at least one of the first transmission gear, the second transmission gear, and the third transmission gear is provided with a 3400A antifriction coating.

[0007] Optionally, the upper surfaces of the first transmission gear, the second transmission gear, and the third transmission gear are all provided with the 3400A antifriction coating.

[0008] Optionally, the thickness of the 3400A antifriction coating is 5-20 μm, and the friction coefficient is 0.06-0.1.

[0009] Optionally, the first rotating gasket, the second rotating gasket, and the third rotating gasket all include POM gaskets.

[0010] Optionally, the X-ray collimator includes three drive motors, and the three drive motors are respectively connected to the first transmission gear, the second transmission gear, and the third transmission gear.

[0011] Optionally, the X-ray collimator further includes a sliding block, and the sliding block is connected to the third transmission gear and the lead blade layer, and is used to change the angle of the lead blade layer through the third transmission gear.

[0012] Optionally, the first connecting member includes a sheet metal part and a connecting rod. A sliding groove is provided on the third transmission gear. The sheet metal part is connected to the first lead leaf. One end of the connecting rod is connected to the sheet metal part, and the other end passes through the sliding groove and extends upward to be connected to the first transmission gear. The structure of the second connecting member is the same as that of the first connecting member.

[0013] Optionally, the first transmission gear, the second transmission gear, and the third transmission gear are all cylindrical gears.

[0014] The present invention also provides a mobile C-arm X-ray detection device, which includes an X-ray tube and the X-ray collimator as described in any of the above solutions. The X-ray tube is located above the X-ray collimator and corresponds to the X-ray exit channel.

[0015] As described above, the X-ray collimator of the present invention stacks multiple transmission gears and multiple rotating spacer rings up and down through an improved structural design. A 3400A anti-friction coating is provided on the upper surface of the transmission gear. In the case of reducing the volume of the entire X-ray collimator, the friction coefficient between gears can be effectively reduced, equipment wear can be reduced, the control accuracy of the X-ray collimator can be improved, the equipment life can be extended in an oil-free environment, and the cost can be reduced. Based on the mobile C-arm X-ray detection device with the X-ray collimator of the present invention, the exit range of the X-ray is accurately controlled by the X-ray collimator, the damage of the X-ray to the human body is minimized, and the service life can be significantly extended. Description of the Drawings

[0016] Figure 1 It shows a schematic structural diagram of the X-ray collimator of the present invention.

[0017] Figure 2 It shows Figure 1 exploded view of.

[0018] Description of Component Labels

[0019] 11 - Rotating top cover; 12 - First rotating spacer ring; 13 - First transmission gear; 14 - Second rotating spacer ring; 15 - Second transmission gear; 16 - Third rotating spacer ring; 17 - Third rotating gear; 171 - Sliding groove; 18 - First lead leaf; 19 - Second lead leaf; 20 - First connecting member; 21 - Rotating support structure; 3 - X-ray exit channel Detailed Embodiments

[0020] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0021] Please refer to Figures 1 to 2It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0022] Embodiment 1

[0023] The present invention provides a transmission device (this device is a part of Figure 1 and Figure 2 so please refer to Figure 1 and Figure 2 for understanding). The transmission device includes a plurality of transmission gears stacked vertically (such as 2 or more), a rotating gasket, and a motor for driving the transmission gears. The rotating gasket is correspondingly arranged between every two of the transmission gears. The motor is connected to the transmission gears, and a 3400A anti-friction coating is provided on the upper surface of the transmission gears. Stacking the structural layers vertically can effectively reduce the volume of the entire transmission device. Arranging a rotating gasket between the transmission gears and providing a 3400A anti-friction coating on the upper surface of the transmission gears can effectively reduce the friction coefficient between the gears, reduce friction loss, and the entire transmission device can be used in an oil-free environment (that is, no lubricating oil is required for lubrication), which can effectively reduce pollution. Based on the transmission device of the present invention, the service life of the equipment can be greatly extended, and the cost can be effectively reduced.

[0024] As an example, the structures of the multiple transmission gears may be completely the same, not completely the same, or completely different. When there are two transmission gears, there is at least one rotating spacer ring; when there are three transmission gears, there are at least two rotating spacer rings; when there are four transmission gears, there are at least three rotating spacer rings, and so on. That is, it is ensured that there is at least one rotating spacer ring between every two adjacent transmission gears. The thicknesses of different rotating spacer rings may be the same or different, and the size of the rotating spacer ring matches the corresponding transmission gear, but it is necessary to ensure that it does not affect the transmission of the transmission gear (the rotating spacer ring does not cover the tooth surface of the outer tooth ring of the gear). The multiple transmission gears may be driven by the same or different motors. The surface of one or more of the multiple transmission gears is provided with the 3400A anti-friction coating. Preferably, the surfaces of all the transmission gears are provided with the 3400A anti-friction coating to minimize friction to the greatest extent. The 3400A anti-friction coating may be a nickel-phosphorus Teflon coating, such as the Molykote 3400A coating provided by Dow Corning. It can not only play a good lubricating role but also effectively prevent the corrosion of the gears. In a further example, the thickness of the 3400A anti-friction coating is 5 - 20 μm, and more preferably, the friction coefficient is 0.06 - 0.1. The operating temperature of the 3400A anti-friction coating (i.e., the operating temperature of the transmission device) is preferably -220°C to 400°C.

[0025] As an example, the rotating spacer ring is preferably a POM spacer ring, but not limited thereto. The POM spacer ring is used because of the excellent friction resistance of the POM material, which helps to improve the service life of the entire transmission device and avoid pollution caused by wear.

[0026] The transmission device of the present invention can be used in a variety of devices. For example, the following X-ray collimator is a specific application based on this transmission device.

[0027] Example Two

[0028] As Figure 1 and Figure 2As shown in the figure, the present invention provides an X-ray collimator. The X-ray collimator includes, from top to bottom, a rotating top cover 11, a first rotating gasket 12, a first transmission gear 13, a second rotating gasket 14, a second transmission gear 15, a third rotating gasket 16, and a third transmission gear 17 (i.e., the X-ray collimator essentially includes the transmission device in Embodiment 1), and a lead leaf layer (for easy support, a fixing seat can also be provided between the third transmission gear 17 and the lead leaf layer, and the third transmission gear 17 is fixed to the fixing seat). The rotating top cover 11, the first rotating gasket 12, the first transmission gear 13, the second rotating gasket 14, the second transmission gear 15, the third rotating gasket 16, and the third transmission gear 17 are all hollow and coaxial to jointly define an X-ray exit channel 3. The X-ray exit channel 3 is the passing path of X-rays. The X-rays emitted by the X-ray tube at the top of the X-ray collimator pass through the X-ray exit channel 3 and then are constrained and adjusted by the lead leaf layer at the bottom to reach a predetermined inspection position (such as the lesion site of the human body) in a predetermined size. The lead leaf layer includes a first lead leaf 18 and a second lead leaf 19. The first lead leaf 18 and the second lead leaf 19 are usually on the same horizontal plane. The first lead leaf 18 is connected to the first transmission gear 13 through a first connecting member 20, and the second lead leaf 19 is connected to the second transmission gear 15 through a second connecting member, and is used to change the positions of the first lead leaf 18 and / or the second lead leaf 19 under the drive of the first transmission gear 13 and / or the second transmission gear 15, thereby changing the size of the X-ray exit channel 3 (i.e., by driving the first transmission gear 13 and / or the second transmission gear 15 to change the relative positions of the first lead leaf 18 and the second lead leaf 19. When the two lead leaves approach each other, the corresponding X-ray exit channel 3 is blocked by the lead leaf at the bottom, so the actual X-ray exit range decreases. On the contrary, when the two lead leaves move away from each other, the actual X-ray exit range increases). A 3400A antifriction coating is provided on the upper surface of at least one of the first transmission gear 13, the second transmission gear 15, and the third transmission gear 17. The X-ray collimator of the present invention stacks multiple transmission gears and multiple rotating gaskets up and down through an improved structural design, and a 3400A antifriction coating is provided on the upper surface of the transmission gear. When the volume of the entire X-ray collimator is reduced, the friction coefficient between the gears can be effectively reduced, friction loss can be reduced, the control accuracy of the X-ray collimator can be improved, and lubricating oil does not need to be used. It can not only extend the service life of the equipment in an oil-free environment, but also effectively reduce pollution and cost. Moreover, the X-ray collimator of the present invention has a small and compact structure, is very convenient to install and disassemble, and can be effectively used in various X-ray detection devices that need to be frequently moved.

[0029] It should be specifically noted that in this specification, descriptions such as "first" and "second" are introduced only for the convenience of description and do not have a substantial limiting meaning. For example, the transmission gear located at the bottom can be defined as "first" and the transmission gear at the top can be defined as "second".

[0030] As an example, the X-ray beam limiter further includes a rotary support structure 21. The rotary support structure 21 includes two symmetrically distributed arc-shaped columns (not separately labeled). The circumference where the inner arcs of the two arc-shaped columns are located corresponds to the X-ray exit channel 3. Specifically, the upper surface of the arc-shaped column is fixed to the rotary top cover 11 through fasteners such as screws, and the lower surface of the arc-shaped column is connected to the third transmission gear 17 (preferably, the arc-shaped column extends downward to the surface of the third transmission gear 17). The first transmission gear 13 and the second transmission gear 15 rotate around the arc-shaped column to ensure that their rotation does not deviate.

[0031] The upper surface of any one of the first transmission gear 13, the second transmission gear 15, and the third transmission gear 17 being provided with the 3400A anti-friction coating can effectively reduce friction loss. In a preferred example, the upper surfaces of the first transmission gear 13, the second transmission gear 15, and the third transmission gear 17 are all provided with the 3400A anti-friction coating to minimize the friction coefficient between the gears and reduce friction loss. Of course, in other examples, the lower surface of the corresponding transmission gear can also be provided with the 3400A anti-friction coating, and this is not strictly limited in this embodiment. The 3400A anti-friction coating can be directly formed on the surface of the corresponding transmission gear through processes such as coating, or can be formed on the surface of the corresponding gear through processes such as film pasting, and this is not strictly limited in this embodiment.

[0032] The thickness of the 3400A anti-friction coating needs to be carefully designed. If it is too thin, it cannot achieve a good effect of reducing the friction coefficient. If it is too thick, the transmission flexibility of the transmission gear may decrease due to the properties of its own material. The inventor found through long-term experiments that when the thickness of the 3400A anti-friction coating is 5 - 20 μm (including the end values. Unless otherwise specified, in this embodiment, when referring to a numerical range, it includes the end values, and this will not be separately explained), and preferably the friction coefficient is 0.06 - 0.1. The working temperature of the 3400A anti-friction coating (i.e., the working temperature of the X-ray beam limiter) is preferably -220°C - 400°C.

[0033] As an example, the first rotary spacer ring 12, the second rotary spacer ring 14, and the third rotary spacer ring 16 all include POM spacer rings and are all straight-leaf rotary spacer rings. Using a spacer ring made of POM material helps to extend the service life of the spacer ring and avoid contamination caused by spacer ring wear.

[0034] The X-ray collimator of this embodiment is preferably automatically controlled. Thus, as an example, the first transmission gear 13, the second transmission gear 15, and the third transmission gear 17 are all driven by motors. In a preferred example, the X-ray collimator includes three drive motors, and the three drive motors are respectively connected to the first transmission gear 13, the second transmission gear 15, and the third transmission gear 17. Of course, in other examples, different transmission gears can also be driven by the same motor, which is not strictly limited in this embodiment, but independent driving is preferred, which can improve the control accuracy and speed.

[0035] As an example, the X-ray collimator further includes a slider, and the slider is connected to the third transmission gear 17 and the lead leaf layer (preferably connected to both the first lead leaf 18 and the second lead leaf 19), and is used to change the angle of the lead leaf layer through the third transmission gear 17. Specifically, the slider moves under the drive of the third transmission gear 17, thereby driving the movement of the lead leaf layer to change the position of the lead leaf layer relative to the X-ray exit channel 3.

[0036] As an example, the first connecting member 20 includes a sheet metal part and a connecting rod. A sliding groove 171 is provided on the third transmission gear 17. The sheet metal part is connected to the first lead leaf 18. One end of the connecting rod is connected to the sheet metal part, and the other end passes through the sliding groove 171 and extends upward to be connected to the first transmission gear 13 (a groove structure for accommodating the connecting rod is provided inside the first transmission gear 13). When the first transmission gear 13 drives the first lead leaf 18 to move, the connecting rod slides in the sliding groove 171. Therefore, the control accuracy of the lead leaf can be improved through the sliding groove 171. The structure of the second connecting member is preferably the same as that of the first connecting member 20, and also includes a sheet metal part and a connecting rod. Therefore, two sliding grooves 171 are provided on the third transmission gear 17. Only the second lead leaf 19 is connected to the second transmission gear 15 through the second connecting member. Therefore, the other end of the connecting rod connecting the second lead leaf 19 passes through the sliding groove located inside the third transmission gear 17 and extends upward to be connected to the second transmission gear 15 (a groove structure for accommodating the connecting rod is provided inside the second transmission gear 15).

[0037] As an example, the first transmission gear 13, the second transmission gear 15, and the third transmission gear 17 are all cylindrical gears, and the height of each transmission gear can be set as required. In this embodiment, as an example, the height and specific structure of the first transmission gear 13 and the second transmission gear 15 are exactly the same, and the height of the third transmission gear 17 is higher than the height of the first transmission gear 13 and the second transmission gear 15.

[0038] The X-ray beam limiter of the present invention can be used in various X-ray detection devices that require controlling the X-ray emission range through lead leaves. It can effectively reduce friction loss and improve the service life of the device, but is particularly suitable for mobile C-arm X-ray detection devices. Since the X-ray beam limiter of the mobile C-arm X-ray detection device is an in-built product and moves frequently, higher requirements are imposed on its transmission device. The X-ray beam limiter of the present invention can fully meet such requirements. Therefore, the present invention also provides a mobile C-arm X-ray detection device, which includes an X-ray tube and the X-ray beam limiter described in any of the above solutions. The X-ray tube is located above the X-ray beam limiter and corresponds to the X-ray emission channel. Specifically, the X-ray beam limiter can be located in a housing. The upper surface of the housing has an opening, and the opening corresponds to the X-ray emission channel up and down. The X-ray tube can be fixed to the housing through a connecting flange and a positioning flange and is correspondingly located directly above the X-ray emission channel. Except for the difference in the structure of the X-ray beam limiter, the mobile C-arm X-ray detection device of the present invention is not much different from the prior art, so it will not be elaborated in detail. The mobile C-arm X-ray detection device based on the X-ray beam limiter of the present invention accurately controls the X-ray emission range through the X-ray beam limiter, maximally reduces the damage of X-rays to the human body, and can significantly extend the service life.

[0039] In summary, the X-ray beam limiter of the present invention stacks multiple transmission gears and multiple rotating washers in an upper and lower layer through an improved structural design. A 3400A antifriction coating is provided on the upper surface of the transmission gear. While reducing the volume of the entire X-ray beam limiter, it can effectively reduce the friction coefficient between the gears, reduce equipment wear, improve the control accuracy of the X-ray beam limiter, extend the equipment life in an oil-free environment, and reduce costs. Moreover, the X-ray beam limiter of the present invention is small and compact in structure, and is very convenient for installation and disassembly. For example, during installation, only the respective structural layers need to be installed in sequence. It can be effectively used in various X-ray detection devices that need to move frequently for operation. The mobile C-arm X-ray detection device based on the X-ray beam limiter of the present invention accurately controls the X-ray emission range through the X-ray beam limiter, maximally reduces the damage of X-rays to the human body, and can significantly extend the service life. Moreover, the transmission device of the present invention can be widely applied to various devices that require transmission, and has great utilization value. Therefore, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0040] The above embodiments are only illustrative of the principles and effects of the present invention and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An X-ray collimator, characterized in that: The X-ray collimator includes, from top to bottom, a rotating top cover, a first rotating gasket ring, a first transmission gear, a second rotating gasket ring, a second transmission gear, a third rotating gasket ring, a third transmission gear, and a lead blade layer. The rotating top cover, the first rotating gasket ring, the first transmission gear, the second rotating gasket ring, the second transmission gear, the third rotating gasket ring, and the third transmission gear are all hollow and coaxial to jointly define an X-ray exit channel. The lead blade layer includes a first lead blade and a second lead blade. The first lead blade is connected to the first transmission gear through a first connecting member, and the second lead blade is connected to the second transmission gear through a second connecting member, and is used to change the positions of the first lead blade and / or the second lead blade under the drive of the first transmission gear and / or the second transmission gear, thereby changing the size of the X-ray exit channel. A 3400A antifriction coating is provided on the upper surface of at least one of the first transmission gear, the second transmission gear, and the third transmission gear. The first connecting member includes a sheet metal part and a connecting rod. A sliding groove is provided on the third transmission gear. The sheet metal part is connected to the first lead blade. One end of the connecting rod is connected to the sheet metal part, and the other end passes through the sliding groove and extends upward to be connected to the first transmission gear. The structure of the second connecting member is the same as that of the first connecting member.

2. The X-ray beam limiter according to claim 1, wherein: The thickness of the 3400A antifriction coating is 5 - 20 μm, and the friction coefficient is 0.06 - 0.

1.

3. The X-ray collimator according to claim 1, wherein: The first rotating gasket ring, the second rotating gasket ring, and the third rotating gasket ring all include POM gasket rings.

4. The X-ray collimator according to claim 1, wherein: The X-ray collimator includes three drive motors, and the three drive motors are respectively connected to the first transmission gear, the second transmission gear, and the third transmission gear.

5. The X-ray beam limiter according to claim 1, wherein: The X-ray collimator further includes a sliding block, and the sliding block is connected to the third transmission gear and the lead blade layer, and is used to change the angle of the lead blade layer through the third transmission gear.

6. The X-ray collimator according to claim 1, wherein: The first transmission gear, the second transmission gear, and the third transmission gear are all cylindrical gears.

7. A mobile C-arm X-ray detection device, characterized in that: The mobile C-arm X-ray detection device includes an X-ray tube and the X-ray collimator according to any one of claims 1 - 6. The X-ray tube is located above the X-ray collimator and corresponds to the X-ray exit channel.

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