CN112006707A - Transmission device, X-ray beam limiter and X-ray detection equipment - Google Patents
Transmission device, X-ray beam limiter and X-ray detection equipment Download PDFInfo
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- CN112006707A CN112006707A CN202010871967.2A CN202010871967A CN112006707A CN 112006707 A CN112006707 A CN 112006707A CN 202010871967 A CN202010871967 A CN 202010871967A CN 112006707 A CN112006707 A CN 112006707A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
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Abstract
The invention provides a transmission device, an X-ray beam limiter and X-ray detection equipment. The transmission device comprises a driving module, a speed reducing module and a transmission module; the driving module comprises a driving gear and a motor; the speed reducing module comprises a first speed reducing gear, a second speed reducing gear and a speed reducing transmission shaft, wherein the first speed reducing gear and the second speed reducing gear are sleeved on the speed reducing transmission shaft and are positioned at two opposite ends of the speed reducing transmission shaft; the first reduction gear is positioned on one side of the driving gear and is meshed with the driving gear; the transmission module comprises a transmission gear, the transmission gear is positioned on one side of the second reduction gear and is meshed with the second reduction gear; the radius of the first reduction gear is larger than the radius of the driving gear and the second reduction gear, and the radius of the transmission gear is larger than the radius of the second reduction gear. The invention can drive larger load by using smaller driving force, and has the advantages of small volume, light weight, high reliability, small friction resistance, high mechanical efficiency and transmission precision and the like.
Description
Technical Field
The invention relates to the technical field of medical diagnosis and treatment equipment, in particular to a transmission device, an X-ray beam limiter and X-ray detection equipment.
Background
X-ray diagnostic techniques are the earliest non-invasive visceral examination techniques used in the world. Since the X-ray passes through the human body, the different parts absorb different degrees of X-ray, for example, the skeleton absorbs more X-ray than the muscle, so that the X-ray passing through the human body is different in the different parts, the different X-ray quantities carry the density distribution information of each part of the human body, the intensity of the fluorescence or sensitization caused on the fluorescent screen or photographic film is greatly different, and therefore, shadows with different densities are displayed on the fluorescent screen or photographic film (after development and fixation). According to the contrast of shade, and the clinical manifestation, the test result and the pathological diagnosis, whether a certain part of the human body is normal can be judged. With the continuous improvement of medical diagnosis level and the higher attention of people to health, the application of X-ray diagnosis technology is more and more extensive.
An X-ray generating device is a basic component of an X-ray medical apparatus, and generally comprises a bulb and an X-ray beam limiter. The X-ray beam limiter is usually mounted under a bulb tube, which emits X-rays that are projected onto the subject through a mask opening in the X-ray beam limiter. The X-ray is harmful to human body, and the projection range of the X-ray is controlled to only irradiate the part of the human body to be examined or the focus part, so that the harm of redundant X-rays to the human body is avoided, and the X-ray beam limiter plays a role.
The function requirement on the existing X-ray beam limiter is more and more, the structural design is more and more compact, and the volume of the selected motor is smaller and smaller. In order to drive the lead blade to move stably, the required reduction ratio is increased, but the available space is smaller and smaller, namely the contradiction between the motor volume and the required reduction ratio is more and more prominent, so that the further miniaturization of the X-ray beam limiter and the X-ray detection equipment is limited.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a transmission device, an X-ray beam limiter and an X-ray detection apparatus, which are used to solve the problems that the function requirements of the existing X-ray beam limiter are more and more, the structural design is more and more compact, and the volume of the selected motor is also less and more. In order to drive the lead blade to move stably, the required reduction ratio is increased, but the available space is smaller and smaller, namely the contradiction between the motor volume and the required reduction ratio is more and more prominent, so that the problems of further miniaturization of the X-ray beam limiter and the X-ray detection equipment and the like are limited.
In order to achieve the above objects and other related objects, the present invention provides a transmission device, including a driving module, a deceleration module and a transmission module; the driving module comprises a driving gear and a motor connected with the driving gear; the speed reducing module comprises a first speed reducing gear, a second speed reducing gear and a speed reducing transmission shaft, wherein the first speed reducing gear and the second speed reducing gear are sleeved on the speed reducing transmission shaft and are positioned at two opposite ends of the speed reducing transmission shaft; the first reduction gear is positioned on one side of the driving gear and meshed with the driving gear; the transmission module comprises a transmission gear, and the transmission gear is positioned on one side of the second reduction gear and meshed with the second reduction gear; wherein the radius of the first reduction gear is larger than the radius of the driving gear and the radius of the second reduction gear, and the radius of the transmission gear is larger than the radius of the second reduction gear; when the motor drives the driving gear to rotate, the first reduction gear rotates at a rotating speed lower than that of the driving gear under the action of the driving gear, and therefore the transmission gear is driven to rotate at a rotating speed lower than that of the driving gear through the reduction transmission shaft and the second reduction gear.
Optionally, the driving gear is fixed on a motor shaft of the motor through a jackscrew.
Optionally, the transmission device further comprises a mounting base, and the reduction transmission shaft penetrates through the mounting base; the first reduction gear is located above the mounting base, the second reduction gear and the transmission gear are located below the mounting base and have a distance with the mounting base, and the transmission gear is connected with the mounting base through a fixed bearing.
Optionally, the transmission device further comprises a spring pin, a support bearing and an E-shaped clamp spring; the spring pin is fixed on the speed reduction transmission shaft and is positioned above the first speed reduction gear; the supporting bearing is located in the mounting base and sleeved on the periphery of the speed reduction transmission shaft, and the E-shaped clamp spring is arranged in the circumferential direction of the speed reduction transmission shaft and located below the supporting bearing and the mounting base.
Optionally, transmission still includes POM pad cover and gasket, POM pad cover is located fixing bearing's periphery just is located the mounting base reaches between the drive gear, the gasket includes first gasket and second gasket, first gasket and second gasket all are located fixing bearing's circumference is last, and first gasket is located POM pad cover reaches between the drive gear, the second gasket is located drive gear's below.
Optionally, the height of the driving gear is greater than that of the first reduction gear, and the height of the second reduction gear is greater than that of the transmission gear.
Optionally, the radius of the first reduction gear is more than 2 times the radius of the driving gear.
Optionally, the radius of the transmission gear is the same as the radius of the first reduction gear, and the radius of the driving gear is the same as the radius of the second reduction gear.
The invention also provides an X-ray beam limiter which comprises an installation base, a shading sheet, a sheet metal part, a shading sheet moving gear, a flange assembly and a transmission device in any scheme; the anti-dazzling screen, the anti-dazzling screen moving gear, the sheet metal part, the flange assembly and the transmission device are all positioned on the mounting base; the shading sheet moving gear is positioned on one side of the transmission gear and is meshed with the transmission gear, the center of the shading sheet moving gear is provided with a through hole, the flange component is embedded in the through hole of the shading sheet moving gear, an X-ray exit hole is arranged in the center of the flange component and corresponds to the through hole of the shading sheet moving gear, the surface of the shading sheet moving gear is provided with a first slide rail, a first slide block and a first guide groove, the first slide rail and the first guide groove are arranged in parallel at intervals and are positioned at the same side of the through hole of the shading sheet moving gear, the first sliding block is positioned on the first sliding rail and can slide along the first sliding rail, one end of the shading sheet is connected with the first sliding block through the sheet metal part, and the width of the shading sheet is larger than the diameter of the X-ray emergent hole; the radius of the shading sheet moving gear is larger than that of the transmission gear; when the light shielding piece moving gear is driven by the transmission gear to rotate at a rotating speed lower than that of the transmission gear, the sheet metal part is driven by the first sliding block to slide along the first sliding rail and the first guide groove, and therefore the light shielding piece is driven to move along a direction perpendicular to the width direction of the light shielding piece so as to change the position of the light shielding piece relative to the X-ray emergent hole.
The invention also provides an X-ray detection device which comprises the X-ray beam limiter in any scheme.
As described above, the transmission device of the present invention can drive a large load with a small driving force through an improved structural design, and has the advantages of small size, light weight, high reliability, small frictional resistance, high mechanical efficiency and high transmission precision. The X-ray beam limiter and the X-ray detection equipment based on the transmission device can greatly reduce the volume while meeting the requirement of the required transmission reduction ratio, are particularly suitable for situations needing mobile operation such as field operation and the like, and have great commercial utilization value.
Drawings
Fig. 1 is a schematic structural diagram of a transmission device according to a first embodiment of the invention.
Fig. 2 and 3 are schematic cross-sectional views of fig. 1 along different directions.
Fig. 4 is a schematic structural diagram of an X-ray beam limiter according to a second embodiment of the present invention.
Description of the element reference numerals
1-a drive module; 11-a drive gear; 12-a support base; 2-a speed reduction module; 21-a first reduction gear; 22-a second reduction gear; 23-a reduction drive shaft; 3-a transmission module; 31-a transmission gear; 41-mounting a base; 42-fixed bearing; 43-a spring pin; 441-upper support bearings; 442-a lower support bearing; 45-E type clamp spring; 46-POM cushion cover; 47-a first shim; 48-a second gasket; 51-a mounting base; 52-shading sheet; 53-sheet metal parts; 54-gobo moving gear; 541-an X-ray exit aperture; 55-a first slide rail; 56-a first slide; 57-a first guide groove; 58-Flange Assembly
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example one
As shown in fig. 1 to 3, the present invention provides a transmission device, which includes a driving module 1, a speed reducing module 2 and a transmission module 3; the driving module 1 comprises a driving gear 11 and a motor connected with the driving gear 11, and the motor is used for driving the driving gear 11; the speed reducing module 2 comprises a first speed reducing gear 21, a second speed reducing gear 22 and a speed reducing transmission shaft 23, wherein the first speed reducing gear 21 and the second speed reducing gear 22 are sleeved on the speed reducing transmission shaft 23 and are positioned at two opposite ends of the speed reducing transmission shaft 23; the first reduction gear 21 is positioned at one side of the driving gear 11 and is engaged with the driving gear 11; the transmission module 3 comprises a transmission gear 31, and the transmission gear 31 is positioned at one side of the second reduction gear 22 and is meshed with the second reduction gear 22; wherein the radius of the first reduction gear 21 is larger than the radius of the driving gear 11 and the second reduction gear 22, and the radius of the transmission gear 31 is larger than the radius of the second reduction gear 22; under the condition of constant linear speed, the radius of the gear is inversely proportional to the rotating speed of the gear, namely when the linear speed is constant, the larger the radius of the gear is, the smaller the rotating speed is, otherwise, the larger the rotating speed is; when the motor drives the driving gear 11 to rotate, since the radius of the first reduction gear 21 is greater than the radius of the driving gear 11, the first reduction gear 21 rotates at a lower speed than the driving gear 11 under the action of the driving gear 11, the speed of the second reduction gear 22 is the same as the speed of the first reduction gear 21, the radius of the second reduction gear 22 is less than the radius of the transmission gear 31, when the transmission gear 31 is driven to rotate by the reduction transmission shaft 23 and the second reduction gear 22, the speed of the transmission gear 31 is lower than the speed of the first reduction gear 21 and naturally lower than the speed of the driving gear 11, and the ratio of the speed of the transmission gear 31 to the speed of the driving gear 11 is 1: n, n is a, wherein a is the ratio of the radius of the first reduction gear 21 to the radius of the driving gear 11, b is the ratio of the radii of the transmission gear 31 and the second reduction gear 22. By the ingenious design, a larger reduction ratio can be obtained, so that a larger load can be driven by using a smaller driving force, and the transmission device has the advantages of small volume, light weight, high reliability, small frictional resistance, high mechanical efficiency, high transmission precision and the like. The transmission device can be used in various devices which need to obtain a larger reduction ratio under the condition that a driving motor is smaller, such as an X-ray beam limiter. The X-ray beam limiter and the X-ray detection equipment based on the transmission device can greatly reduce the volume while meeting the requirement of the required transmission reduction ratio, can be suitable for situations needing mobile operation such as field operation and the like, and have great commercial utilization value.
By way of example, the motor includes, but is not limited to, a stepper motor to precisely control the speed of the transmission. As an example, the driving gear 11 is fixed to a motor shaft of the motor by a jackscrew. And in a further example, the driving module 1 further includes a supporting base 12, the driving gear 11 is located on an upper surface of the supporting base 12, and the motor shaft passes through the supporting base 12. Through setting up support base 12 is not only convenient for drive gear 11's installation is fixed, makes simultaneously drive gear 11 has a take the altitude, the installation of other structures of being convenient for.
To facilitate the installation and fixation of the speed reduction module 2, the transmission device further includes, as an example, an installation base 41, and the installation base 41 may be partially located on the support base 12, that is, the installation base 41 is supported by the support base 12, and the speed reduction transmission shaft 23 penetrates through the installation base 41; the first reduction gear 21 is located above the mounting base 41, the second reduction gear 22 and the transmission gear 31 are located below the mounting base 41 with a distance from the mounting base 41, and the transmission gear 31 is connected with the mounting base 41 through a fixing bearing 42, the fixing bearing 42 can extend into the mounting base 41, and even extend to the upper surface of the mounting base 41, so as to enhance the stability of the fixing bearing 42, thereby enhancing the stability of the transmission gear 31.
In a further example, in order to facilitate the installation and fixation of the first reduction gear 21, the transmission device further comprises a spring pin 43, a support bearing and an E-shaped clamp spring 45; the spring pin 43 is fixed on the reduction transmission shaft 23 (for example, penetrates into the reduction transmission shaft 23) and is located above the first reduction gear 21 to prevent the first reduction gear 21 from falling off from the reduction transmission shaft 23; the support bearing is positioned in the mounting base 41 and sleeved on the periphery of the reduction transmission shaft 23, and the E-shaped clamp spring 45 is arranged in the circumferential direction of the reduction transmission shaft 23 and below the support bearing and the mounting base 41 to prevent the first reduction gear 21 from shifting and/or misplacing; the support bearings may include an upper support bearing 441 and a lower support bearing 442 which are respectively installed at the upper portion and the lower portion of the mounting base 41, the upper support bearing 441 is located at the lower surface of the first reduction gear, and a gasket, such as a copper gasket, may be further disposed between the upper support bearing 441 and the first reduction gear 21 to enhance the stability of the first reduction gear 21; the E-shaped clamp spring 45 is arranged in the circumferential direction of the speed reduction transmission shaft 23 and below the lower support bearing 442, and is also arranged below the mounting base 41 to fixedly support the mounting base 41 and prevent the speed reduction transmission shaft 23 from moving, so that the transmission stability is improved.
For the reinforcing transmission module 3's stability, as the example, transmission still includes POM cushion cover 46 and gasket, POM cushion cover 46 cover is located fixing bearing 42's periphery just is located mounting base 41 reaches between the drive gear 31, the gasket includes first gasket 47 and second gasket 48, first gasket 47 and second gasket 48 all are located fixing bearing 42's circumference is last, and first gasket 47 is located POM cushion cover 46 reaches between the drive gear 31, second gasket 48 is located drive gear 31's below, second gasket 48's below can further set up fixed knot and construct, for example the jump ring of E type structure. The cushion cover made of POM material is used for enhancing the wear resistance and the service life of the whole device, and the first gasket 47 and the second gasket 48, including but not limited to copper gaskets, are used for enhancing the stability of the whole device.
As an example, the height of the driving gear 11 is greater than that of the first reduction gear 21, and the height of the second reduction gear 22 is greater than that of the transmission gear 31, so that not only can the meshing between the gears be ensured, but also the driving gear 11 and the transmission gear 31 have a larger height difference, and the installation of other structures is facilitated.
The specific radii of the driving gear 11, the first reduction gear 21, the second reduction gear 22 and the transmission gear 31 can be set according to a desired reduction ratio. In one example, the radius of the first reduction gear 21 is more than 2 times, such as 2 times, 3 times, 4 times or more, the radius of the drive gear 11. And in a further example, the radius of the transmission gear 31 is the same as the radius of the first reduction gear 21, and the radius of the driving gear 11 is the same as the radius of the second reduction gear 22. Of course, in other examples, the radius ratio of each gear may be selected according to the required reduction ratio, and the embodiment is not limited strictly. The transmission gear 31 is connected with the component to be transmitted, and the rotating speed of the transmission gear 31 is lower than that of the driving gear 11, so that a larger load can be driven by a smaller driving force, the component to be transmitted can be driven to rotate at a lower rotating speed, the transmission speed of the component to be transmitted can be controlled accurately, and the mechanical efficiency and the transmission precision can be improved. The whole transmission device has the advantages of small volume, light weight, high reliability, small friction resistance and the like, and is favorable for further miniaturization of equipment under the condition of meeting the reduction ratio of the equipment. For example, the following X-ray beam limiter is based on a further application of the drive.
Example two
As shown in fig. 4, the present invention further provides an X-ray beam limiter, which includes a mounting base 51, a shutter 52, a sheet metal part 53, a shutter moving gear 54, a flange assembly 58, and a transmission device according to any one of the first embodiment; the shading sheet 52, the shading sheet moving gear 54, the sheet metal part 53, the flange assembly 58 and the transmission device are all positioned on the mounting base 51; the shade moving gear 54 is located at one side of the transmission gear 31 and is meshed with the transmission gear 31, a through hole is arranged in the center of the shade moving gear 54, the flange assembly 58 is embedded in the through hole of the shade moving gear 54, an X-ray exit hole 541 is arranged in the center of the flange assembly 58, the X-ray exit hole 541 corresponds to the through hole, a first slide rail 55, a first slide block 56 and a first guide groove 57 are arranged on the surface of the shade moving gear 54, the first slide rail 55 and the first guide groove 57 are arranged in parallel at intervals and are located at the same side of the through hole of the shade moving gear, the first slide block 56 is located on the first slide rail 55 and can slide along the first slide rail 55, a plurality of clamping holes (not marked) can be arranged on the first slide rail 55 along the length direction thereof, one end of the shade 52 is connected with the first slide block 56 through the sheet metal part 53, the width of the light-shielding sheet 52 is larger than the diameter of the X-ray exit hole 541 (i.e., when the light-shielding sheet 52 is moved above the X-ray exit hole 541, the light-shielding sheet 52 spans the X-ray exit hole 541); wherein, the radius of the shading sheet moving gear 54 is larger than that of the transmission gear 31; when the shutter moving gear 54 is driven by the transmission gear 31 to rotate at a speed lower than that of the transmission gear 31, the sheet metal part 53 is driven by the first slider 56 to slide along the first slide rail 55 and the first guide groove 57 (the lower surface of the sheet metal part 53 is provided with a guide support structure capable of sliding in the first guide groove 57), and thereby the shutter 52 is driven to move in a direction perpendicular to the width direction of the shutter 52 to change the position of the shutter 52 relative to the X-ray exit hole 541 (the movement is a translation relative to the shutter moving gear 54), that is, the size of the X-ray exit range is changed to meet the required detection requirement. The whole X-ray beam limiter has the advantages of small and exquisite structure, small frictional resistance and high control precision, can be used for various X-ray detection devices, and has particularly outstanding advantages when being used in an environment requiring frequent moving operation.
The material of the light shielding sheet 52 can be set according to the requirement, including but not limited to copper sheet and lead blade. In order to improve the smoothness of the movement of the shade 52, for example, the surface of the shade moving gear 54 is further provided with a second slide rail, a second slide block and a second guide groove (not shown), the second slide rail and the first slide rail 55 are located at opposite sides of the through hole of the gobo moving gear, the second slide rail and the second guide groove are arranged in parallel at intervals and are positioned at the same side of the through hole of the shading sheet moving gear, the second sliding block is positioned on the second sliding rail and can slide along the second sliding rail, the other end of the shading sheet 52 is connected with the second sliding block through a sheet metal part 53, that is, both sides of the light-shielding sheet 52 are connected to the corresponding sliding blocks through the sheet metal parts 53 to move along the corresponding sliding rails as needed, and the light-shielding sheet 52 spans over the X-ray exit hole 541 during the moving process to change the size of the X-ray exit range.
The shape of the light shielding sheet 52 may be set according to needs, such as a rectangle. In this embodiment, as shown in fig. 4, the light shielding sheet 52 is wedge-shaped, that is, one surface of the light shielding sheet 52 is an arc-shaped surface, and the arc-shaped surface is parallel to the moving direction of the light shielding sheet 52. With the wedge-shaped light shield 52, the blood vessels of the heart can be seen more clearly during the heart surgery. The light-shielding sheets 52 may be a single sheet or a plurality of sheets, for example, 2 sheets, and when there are 2 light-shielding sheets 52, two light-shielding sheets 52 are disposed on opposite sides of the X-ray exit hole 541, so as to change the size of the X-ray exit range through opening and closing of the two light-shielding sheets 52. The two gobos can be driven by the same gobo moving gear 54 or by different driving manners, which is not strictly limited in this embodiment.
In another example, the X-ray beam limiter may further include a shutter rotation gear (not shown) located on a side of the shutter moving gear 54 facing away from the shutter 52, and a through hole of the shutter rotation gear corresponds to a through hole of the shutter moving gear 54 up and down, and the radii of the shutter rotation gear and the shutter moving gear 54 may be the same or different. The shutter plate rotating gear may be engaged with the transmission gear 31 to be driven by the transmission gear 31, or may be driven by other methods, which is not limited in this embodiment. When the shutter plate rotating gear and the shutter plate moving gear 54 rotate simultaneously, the shutter plate 52 may be rotated.
The invention also provides X-ray detection equipment which comprises the X-ray beam limiter in any scheme, and further comprises a bulb tube and a high-voltage generator, wherein the high-voltage generator is electrically connected with the bulb tube, the bulb tube is positioned above the X-ray beam limiter, and the focus of the bulb tube corresponds to the center of the X-ray emergent hole. The structure of the X-ray beam limiter of the X-ray detection device of the invention is different from the prior art, and other parts are not much different from the prior art, and the details are not expanded because the contents of the parts are well known to those skilled in the art. The X-ray detection equipment based on the X-ray beam limiter can greatly reduce the volume and the weight while meeting the requirement of the required transmission reduction ratio. The X-ray beam limiter and the X-ray detection equipment are particularly suitable for various application occasions with limited space and/or moving operation, such as battlefield hospitals. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A transmission device is characterized by comprising a driving module, a speed reducing module and a transmission module; the driving module comprises a driving gear and a motor connected with the driving gear; the speed reducing module comprises a first speed reducing gear, a second speed reducing gear and a speed reducing transmission shaft, wherein the first speed reducing gear and the second speed reducing gear are sleeved on the speed reducing transmission shaft and are positioned at two opposite ends of the speed reducing transmission shaft; the first reduction gear is positioned on one side of the driving gear and meshed with the driving gear; the transmission module comprises a transmission gear, and the transmission gear is positioned on one side of the second reduction gear and meshed with the second reduction gear; wherein the radius of the first reduction gear is larger than the radius of the driving gear and the radius of the second reduction gear, and the radius of the transmission gear is larger than the radius of the second reduction gear; when the motor drives the driving gear to rotate, the first reduction gear rotates at a rotating speed lower than that of the driving gear under the action of the driving gear, and therefore the transmission gear is driven to rotate at a rotating speed lower than that of the driving gear through the reduction transmission shaft and the second reduction gear.
2. The transmission of claim 1, wherein the drive gear is secured to a motor shaft of the motor by a jackscrew.
3. The transmission of claim 1, further comprising a mounting base, said reduction drive shaft extending through said mounting base; the first reduction gear is positioned above the mounting base, and the second reduction gear and the transmission gear are positioned below the mounting base and have a distance with the mounting base; the transmission gear is connected with the mounting base through a fixed bearing.
4. The transmission of claim 3, further comprising a spring pin, a support bearing, and an E-clamp spring; the spring pin is fixed on the speed reduction transmission shaft and is positioned above the first speed reduction gear; the supporting bearing is located in the mounting base and sleeved on the periphery of the speed reduction transmission shaft, and the E-shaped clamp spring is arranged in the circumferential direction of the speed reduction transmission shaft and located below the supporting bearing and the mounting base.
5. A transfer device as in claim 3 wherein: transmission still includes POM cushion cover and gasket, POM cushion cover is located fixing bearing's periphery just is located the mounting base reaches between the drive gear, the gasket includes first gasket and second gasket, first gasket and second gasket all are located fixing bearing's circumference is last, and first gasket is located POM cushion cover reaches between the drive gear, the second gasket is located drive gear's below.
6. The transmission of claim 1, wherein the height of the drive gear is greater than the height of the first reduction gear, and the height of the second reduction gear is greater than the height of the transmission gear.
7. The transmission of claim 1, wherein the radius of the first reduction gear is more than 2 times the radius of the drive gear.
8. The transmission of claim 1, wherein the radius of the transmission gear is the same as the radius of the first reduction gear, and the radius of the drive gear is the same as the radius of the second reduction gear.
9. An X-ray beam limiter, which is characterized by comprising a mounting base, a light shield, a sheet metal part, a light shield moving gear, a flange assembly and a transmission device according to any one of claims 1 to 8; the anti-dazzling screen, the anti-dazzling screen moving gear, the sheet metal part, the flange assembly and the transmission device are all positioned on the mounting base; the shading sheet moving gear is positioned on one side of the transmission gear and is meshed with the transmission gear, the center of the shading sheet moving gear is provided with a through hole, the flange component is embedded in the through hole of the shading sheet moving gear, an X-ray exit hole is arranged in the center of the flange component and corresponds to the through hole of the shading sheet moving gear, the surface of the shading sheet moving gear is provided with a first slide rail, a first slide block and a first guide groove, the first slide rail and the first guide groove are arranged in parallel at intervals and are positioned at the same side of the through hole of the shading sheet moving gear, the first sliding block is positioned on the first sliding rail and can slide along the first sliding rail, one end of the shading sheet is connected with the first sliding block through the sheet metal part, and the width of the shading sheet is larger than the diameter of the X-ray emergent hole; the radius of the shading sheet moving gear is larger than that of the transmission gear; when the light shielding piece moving gear is driven by the transmission gear to rotate at a rotating speed lower than that of the transmission gear, the sheet metal part is driven by the first sliding block to slide along the first sliding rail and the first guide groove, and therefore the light shielding piece is driven to move along a direction perpendicular to the width direction of the light shielding piece so as to change the position of the light shielding piece relative to the X-ray emergent hole.
10. An X-ray examination apparatus, characterized in that the X-ray examination apparatus comprises an X-ray beam limiter according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010871967.2A CN112006707A (en) | 2020-08-26 | 2020-08-26 | Transmission device, X-ray beam limiter and X-ray detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010871967.2A CN112006707A (en) | 2020-08-26 | 2020-08-26 | Transmission device, X-ray beam limiter and X-ray detection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112006707A true CN112006707A (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010871967.2A Pending CN112006707A (en) | 2020-08-26 | 2020-08-26 | Transmission device, X-ray beam limiter and X-ray detection equipment |
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| Country | Link |
|---|---|
| CN (1) | CN112006707A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113456252A (en) * | 2021-06-30 | 2021-10-01 | 苏州市职业大学 | Medical light chopper |
-
2020
- 2020-08-26 CN CN202010871967.2A patent/CN112006707A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113456252A (en) * | 2021-06-30 | 2021-10-01 | 苏州市职业大学 | Medical light chopper |
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Inventor after: Wang Jiejie Inventor after: Zhu Zhongming Inventor before: Zhu Zhongming |