A rotating balance mechanism for a mammography machine

Abstract

This invention discloses a rotational balancing mechanism for a breast cancer machine. The breast cancer machine includes a trolley plate, a main shaft, a X-ray tube arm, and a detector arm. The rotational balancing mechanism includes a C-arm rotational balancing module and a X-ray tube arm rotational balancing module. The C-arm rotational balancing module is located between the main shaft and the trolley plate, and the X-ray tube arm rotational balancing module is located between the main shaft and the X-ray tube arm. The C-arm rotational balancing module includes a reversing wheel, a transmission belt, a first gas spring, and a first balance ring. The reversing wheel is rotatably mounted on the trolley plate, the first balance ring is fixed on the main shaft, the first gas spring is mounted on the trolley plate, the rod of the first gas spring is fixedly connected to one end of the transmission belt, and the other end of the transmission belt is fixedly connected to the first balance ring. The transmission belt is wound around the reversing wheel. The X-ray tube arm rotational balancing module includes a connecting belt, a second gas spring, and a second balance ring. The second balance ring is fixed on the main shaft, the second gas spring is mounted on the X-ray tube arm, the rod of the second gas spring is fixedly connected to one end of the connecting belt, and the other end of the connecting belt is fixedly connected to the second balance ring.

Description

Technical Field

[0001] This invention belongs to the field of off-center rotational balancing technology and relates to a rotational balancing mechanism for a mammary gland machine. Background Technology

[0002] A mammography machine is an X-ray machine specifically used for the examination and diagnosis of breast lesions; it is also called a mammography machine. The X-ray tube arm is the arm that connects the X-ray tube to the mammography machine, while the C-arm is a combination of the X-ray tube arm and the detector arm of the mammography machine. Because its shape is similar to a C, it is simply called the C-arm.

[0003] When a mammography machine captures 3D images, the rotation center must be aligned with the location of the lesion being imaged. This means the rotation centers of the C-arm and X-ray tube arm cannot be centrally located, resulting in off-center loading during rotation. The off-center rotational balancing mechanism of mammography machines has always been a design challenge, requiring consideration of both bidirectional rotational balancing and a confined spatial layout. Some mammography machines on the market lack a rotational balancing mechanism, relying entirely on the motor's traction, which significantly impacts motor load and lifespan. Other machines only have a balancing mechanism for the C-arm rotation, but their complex structure leaves no space for a balancing mechanism for the X-ray tube arm rotation.

[0004] In summary, the current rotating system of a mammography machine has four main problems: 1. The off-center rotation of the C-arm places high demands on the motor load, and also poses certain safety hazards. 2. Due to the off-center motion, the rotational accuracy of the C-arm and the X-ray tube arm cannot be well controlled. 3. The rotational balancing mechanism cannot be used simultaneously for C-arm and X-ray tube arm rotation. 4. The rotation angle range of the rotational balancing mechanism is limited. Therefore, designing a rotational balancing mechanism for a mammography machine to solve these problems is particularly necessary. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a rotating balancing mechanism for a mammary gland machine.

[0006] To achieve the above objectives, the technical solution of the present invention is: a rotational balancing mechanism for a mammography machine, the mammography machine including a trolley plate, a main shaft, a X-ray tube arm, and a detector arm. The main shaft is mounted on the trolley plate, and the X-ray tube arm and detector arm are both mounted on the main shaft. The main shaft can drive the X-ray tube arm and detector arm to rotate together, while the X-ray tube arm can also rotate independently relative to the main shaft. The rotational balancing mechanism includes a C-arm rotational balancing module and a X-ray tube arm rotational balancing module. The C-arm rotational balancing module is located between the main shaft and the trolley plate, and the X-ray tube arm rotational balancing module is located between the main shaft and the X-ray tube arm. The C-arm rotational balancing... The module includes a reversing wheel, a drive belt, a gas spring, and a balance ring. The reversing wheel is rotatably mounted on a trolley plate. The balance ring is fixed to the main shaft. The gas spring is mounted on the trolley plate. The rod of the gas spring is fixedly connected to one end of the drive belt, and the other end of the drive belt is fixedly connected to the balance ring. The drive belt is wound around the reversing wheel. The ball tube arm rotation balancing module includes a connecting belt, a second gas spring, and a second balance ring. The second balance ring is fixed to the main shaft. The second gas spring is mounted on the ball tube arm. The rod of the second gas spring is fixedly connected to one end of the connecting belt, and the other end of the connecting belt is fixedly connected to the second balance ring.

[0007] The C-arm rotational balancing module also includes a connector, a connecting seat, a fixed seat, and a tightening screw. The rod of the gas spring is fixedly connected to one end of the transmission belt through the connector. The connecting seat and the gas spring are fixedly connected. The fixed seat is fixed on the trolley plate. The tightening screw is threadedly connected to the fixed seat and the connecting seat.

[0008] The X-ray tube arm rotation balancing module also includes a second connector, a second connecting seat, a second fixed seat, and a second tightening screw. The rod of the second gas spring is fixedly connected to one end of the connecting belt through the second connector. The second connecting seat is rotatably connected to the second gas spring through a connecting pin. The second fixed seat is fixed on the X-ray tube arm. The first tightening screw is threadedly connected to the second fixed seat and the second connecting seat.

[0009] The reversing wheel is rotatably mounted on the trolley plate via a mounting shaft. A nut is threaded onto the reversing wheel, and a washer is provided between the nut and the trolley plate.

[0010] By adopting the above technical solution, the beneficial effects of the present invention are:

[0011] 1. This invention provides a dual-system independent rotational balancing mechanism that can be simultaneously installed on the C-arm rotation and the tube arm rotation.

[0012] 2. Improved the precision of C-arm rotation and X-ray tube arm rotation of the mammography machine.

[0013] 3. Improved safety of C-arm rotation and off-center rotation of the X-ray tube arm.

[0014] 4. Increased the balance range of C-arm rotation and X-ray tube arm rotation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the C-arm rotational balancing module in this invention;

[0017] Figure 3 This is an exploded view of the C-arm rotational balancing module in this invention;

[0018] Figure 4 This is a three-dimensional structural diagram of the X-ray tube arm rotation balancing module in this invention;

[0019] Figure 5 This is an exploded view of the X-ray tube arm rotation balancing module in this invention;

[0020] In the diagram, 10 is the trolley plate; 20 is the X-ray tube arm rotation balancing module; 201 is the second gas spring; 202 is the second connecting seat; 203 is the second tightening screw; 204 is the second fixed seat; 205 is the connecting belt; 206 is the second balance ring; 207 is the second connector; 208 is the connecting pin; 30 is the detector arm; 40 is the X-ray tube arm; 50 is the C-arm rotation balancing module; 501 is the first gas spring; 502 is the first connector; 503 is the reversing wheel; 504 is the transmission belt; 505 is the first balance ring; 506 is the first fixed seat; 507 is the first tightening screw; 508 is the first connecting seat; 509 is the washer; 510 is the mounting shaft; 511 is the nut; and 60 is the main shaft. Detailed Implementation

[0021] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0022] like Figure 1-5As shown, the rotating balancing mechanism of this mammography machine includes a trolley plate 10, a main shaft 60, a X-ray tube arm 40, and a detector arm 30. The main shaft 60 is mounted on the trolley plate 10, and both the X-ray tube arm 40 and the detector arm 30 are mounted on the main shaft 60. The main shaft 60 can drive the X-ray tube arm 40 and the detector arm 30 to rotate together. At the same time, the X-ray tube arm 40 can also rotate independently relative to the main shaft 60. In this embodiment, the X-ray tube arm 40 and the detector arm 30 rotate together, and the independent rotation of the X-ray tube arm 40 is achieved using existing technology. That is, when the mammography machine is working, the C-arm and the X-ray tube... Arm 40 will rotate independently around the main shaft 60 as the rotation center. C-arm will rotate ±180° around the main shaft 60. X-ray tube arm 40 will swing independently ±60° around the main shaft 60. The rotation angle here is the commonly used angle of mammography machine. If a larger rotation angle is required, this structure can also be used. The rotation balancing mechanism includes ball C-arm rotation balancing module 50 and X-ray tube arm rotation balancing module 20. C-arm rotation balancing module 50 is located between the main shaft 60 and the trolley plate 10. X-ray tube arm rotation balancing module 20 is located between the main shaft 60 and X-ray tube arm 40.

[0023] The C-arm rotation balancing module 50 includes a reversing wheel 503, a transmission belt 504, a gas spring 501, and a balance ring 505. The reversing wheel 503 is rotatably mounted on the trolley plate 10, and the reversing wheel 503 is arranged vertically with the main shaft 60. The balance ring 505 is fixed on the main shaft 60. The gas spring 501 is mounted on the trolley plate 10. The rod of the gas spring 501 is fixedly connected to one end of the transmission belt 504, and the other end of the transmission belt 504 is fixedly connected to the balance ring 505. The transmission belt 504 is wound around the reversing wheel 503. Figure 2The C-arm rotation is achieved by driving the main shaft 60 to rotate. When the main shaft 60 rotates, the transmission belt 504 is wound around the balance ring 505. Due to the tension of the gas spring 501, a torque is generated that opposes the rotation of the main shaft 60. Similarly, to achieve rotational balance, the required tension of the gas spring 501 can be calculated according to the torque balance formula F3*R3=F4*R4, where F3 is the tension of the gas spring 501, R3 is the radius of the balance ring 505, F4 is the weight of the C-arm, and R4 is the distance from the center of gravity of the C-arm to the center of rotation. Unlike the rotational balancing mechanism of the tube arm 40, the C-arm rotational balancing mechanism... The reversing wheel 503 allows the gas spring 501 to be installed vertically in the opposite direction. This not only greatly reduces the installation length of the balancing mechanism, but also allows the gas spring 501 to be stretched linearly without oscillation. This simplifies the structure of the connecting seat 508 and further reduces the installation space. One end of the connecting seat 508 is connected to the gas spring 501, and the other end is connected to the fixed seat 506 through the tightening screw 507. The fixed seat 506 is connected to the trolley plate 10. The tightening screw 507 can pre-tighten the gas spring 501. When pre-tightened, the flat surface of the connecting seat 508 is inserted into the groove of the fixed seat 506 to prevent the connecting seat 508 from rotating.

[0024] The X-ray tube arm rotation balancing module 20 includes a connecting belt 205, a second gas spring 201, and a second balancing ring 206. The second balancing ring 206 is fixed on the main shaft 60, and the second gas spring 201 is mounted on the X-ray tube arm 40. The rod of the second gas spring 201 is fixedly connected to one end of the connecting belt 205, and the other end of the connecting belt 205 is fixedly connected to the second balancing ring 206. Figure 4 With the rotation center in an off-center position, a continuous tension force is applied to the X-ray tube arm 40 in the vertical direction. This tension force, in conjunction with the balance ring 206, generates a torque opposite to the rotational torque of the X-ray tube arm 40, thus achieving rotational balance. When the gas spring 201 is in its shortest position, the X-ray tube arm 40 swings, causing the gas spring 201 to stretch. This generates a return force on the gas spring 201, the magnitude of which depends on the tension force of the gas spring 201. To achieve rotational balance for the X-ray tube arm 40, the following formula can be used: F1*R1=F2*R2, where F1 represents the tension force of the gas spring 201, R1 represents the radius of the balance ring 206, F2 represents the weight of the X-ray tube arm 40, and R2 represents the distance from the center of gravity of the X-ray tube arm 40 to the rotation center.

[0025] The C-arm rotation balance module 50 also includes a connector 502, a connecting seat 508, a fixed seat 506, and a tightening screw 507. The rod of the gas spring 501 is fixedly connected to one end of the transmission belt 504 through the connector 502. The connecting seat 508 is fixedly connected to the gas spring 501. The fixed seat 506 is fixed on the trolley plate 10. The tightening screw 507 is threadedly connected to the fixed seat 506 and the connecting seat 508.

[0026] The X-ray tube arm rotation balance module 20 also includes a second connector 207, a second connector 202, a second fixed seat 204, and a second tightening screw 203. The rod of the second gas spring 201 is fixedly connected to one end of the connecting belt 205 via the second connector 207. The second connector 202 is rotatably connected to the second gas spring 201 via the connecting pin 208. The second fixed seat 204 is fixed on the X-ray tube arm 40. The first tightening screw 507 is threadedly connected to the second fixed seat 204 and the second connector 202. With this connection method, the second gas spring 201 can swing freely with rotation. The second connector 202 is connected to the second fixed seat 204 via the second tightening screw 203. There is a certain gap between the second connector 202 and the second fixed seat 204. The second tightening screw 203 can pre-tighten the second gas spring 201. The second fixed seat 204 is fixed to the X-ray tube arm as one unit.

[0027] The reversing wheel 503 is rotatably mounted on the trolley plate 10 via the mounting shaft 510. A nut 511 is threaded onto the reversing wheel 503, and a washer 509 is also provided between the nut 511 and the trolley plate 10.

[0028] In practice, the same effect can be achieved by replacing gas spring 501 and gas spring 201 with mechanical springs or other components that can provide continuous tension; the transmission belt 504 and connecting belt 205 can be chain belts, or wire ropes or other flexible rope connections.

[0029] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0030] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A rotating balancing mechanism for a breast mammography machine, the breast mammography machine comprising a trolley plate (10), a main shaft (60), a X-ray tube arm (40), and a detector arm (30), wherein the main shaft (60) is mounted on the trolley plate (10), and the X-ray tube arm (40) and the detector arm (30) are both mounted on the main shaft (60), the main shaft (60) can drive the X-ray tube arm (40) and the detector arm (30) to rotate together, and simultaneously, the X-ray tube arm (40) can rotate independently relative to the main shaft (60), characterized in that, The rotary balancing mechanism includes a ball C-arm rotary balancing module (50) and a ball tube arm rotary balancing module (20). The C-arm rotary balancing module (50) is located between the main shaft (60) and the trolley plate (10), and the ball tube arm rotary balancing module (20) is located between the main shaft (60) and the ball tube arm (40). The C-arm rotary balancing module (50) includes a reversing wheel (503), a transmission belt (504), a gas spring (501), and a balance ring (505). The reversing wheel (503) is rotatably mounted on the trolley plate (10), the balance ring (505) is fixed on the main shaft (60), and the gas spring (501) is mounted on the trolley plate (10). Above, the rod of the first gas spring (501) is fixedly connected to one end of the transmission belt (504), and the other end of the transmission belt (504) is fixedly connected to the first balance ring (505). The transmission belt (504) is wound around the reversing wheel (503). The ball tube arm rotation balance module (20) includes a connecting belt (205), a second gas spring (201) and a second balance ring (206). The second balance ring (206) is fixed on the main shaft (60). The second gas spring (201) is mounted on the ball tube arm (40). The rod of the second gas spring (201) is fixedly connected to one end of the connecting belt (205), and the other end of the connecting belt (205) is fixedly connected to the second balance ring (206). The C-arm rotation balance module (50) also includes a connector (502), a connecting seat (508), a fixed seat (506), and a tightening screw (507). The rod of the gas spring (501) is fixedly connected to one end of the transmission belt (504) through the connector (502). The connecting seat (508) is fixedly connected to the gas spring (501). The fixed seat (506) is fixed on the trolley plate (10). The tightening screw (507) is threadedly connected to the fixed seat (506) and the connecting seat (508). The X-ray tube arm rotation balance module (20) also includes a second connector (207), a second connector (202), a second fixed seat (204), and a second tightening screw (203). The rod of the second gas spring (201) is fixedly connected to one end of the second connector (207) and the connecting belt (205). The second connector (202) is rotatably connected to the second gas spring (201) through the connecting pin (208). The second fixed seat (204) is fixed on the X-ray tube arm (40). The first tightening screw (507) is threadedly connected to the second fixed seat (204) and the second connector (202).

2. The rotating balancing mechanism for a mammary gland machine according to claim 1, characterized in that, The reversing wheel (503) is rotatably mounted on the trolley plate (10) via the mounting shaft (510). A nut (511) is threaded onto the reversing wheel (503), and a washer (509) is provided between the nut (511) and the trolley plate (10).

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