Rotating mechanism and digital subtraction angiography equipment
By incorporating multiple bearing assemblies into the design of the rotating arm and the cage, and by setting multiple bearing assemblies in the rotating mechanism, the stability of the rotating mechanism is achieved, thus improving image quality.
Patent Information
- Application Number
- CN202520269591.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-02-19
AI Technical Summary
The rotating arm is prone to shaking in digital subtraction angiography equipment, which can lead to a decrease in image quality.
By grouping multiple bearings on the cage, each wall of the limiting groove has a corresponding bearing for rotational engagement, ensuring that the force direction and position between each group of bearings and the limiting groove are clear.
This achieved smooth rotation of the rotating arm, improving image quality.
Smart Images
Figure CN223695893U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of medical equipment, and in particular to a rotating mechanism and a digital subtraction angiography device. BACKGROUND
[0002] In the related art, a rotating arm, such as a C-arm, of a digital subtraction angiography (DSA) device is rotatably connected to a holder, and movement of the rotating arm drives movement of a ball tube and a detector and the like, thereby obtaining a blood vessel image.
[0003] However, during movement, the rotating arm is prone to shaking, thereby causing a decrease in image quality. UTILITARIAN CONTENT
[0004] Embodiments of the present application provide a rotating mechanism for improving the problem that the rotating arm is prone to shaking, thereby causing a decrease in image quality.
[0005] According to an aspect of the present application, a rotating mechanism is provided, comprising a holder, a bearing set, and a rotating arm, the bearing set being arranged on the holder, the bearing set comprising a plurality of bearings; the rotating arm being arranged on the holder, the rotating arm being provided with a limiting slot, the rotating arm being capable of rotating relative to the holder along an extension direction of the limiting slot; wherein the limiting slot has a plurality of sequentially connected slot walls, and each slot wall has a corresponding bearing rotatingly matched therewith.
[0006] In some embodiments, the plurality of slot walls comprises a first side wall and a second side wall opposite to each other; and the plurality of bearings comprises a plurality of first bearings and a plurality of second bearings, the first bearings being rotatingly matched with the first side wall, and the second bearings being rotatingly matched with the second side wall.
[0007] In some embodiments, the first bearings are arranged in a spaced manner with the second side wall; and / or, the second bearings are arranged in a spaced manner with the first side wall.
[0008] In some embodiments, the holder has a first section and a second section sequentially arranged along the extension direction of the limiting slot; the plurality of bearings comprises a plurality of first bearings and a plurality of second bearings arranged along the extension direction of the limiting slot; in the first section, the plurality of first bearings and the plurality of second bearings are alternately arranged along a first direction; in the second section, the plurality of first bearings and the plurality of second bearings are alternately arranged along a second direction; wherein the first direction is opposite to the second direction.
[0009] In some embodiments, the plurality of bearings comprises a plurality of first bearings and a plurality of second bearings, and the plurality of first bearings and the plurality of second bearings are arranged alternately along the extending direction of the limiting slot.
[0010] In some embodiments, the plurality of slot walls further comprises a bottom wall connected between the first side wall and the second side wall, and the plurality of bearings further comprises a plurality of third bearings, the third bearings being rotatably connected with the bottom wall.
[0011] In some embodiments, the axial direction of the first bearings is parallel to the axial direction of the second bearings, and the axial direction of the first bearings and the axial direction of the second bearings are both intersected with the axial direction of the third bearings.
[0012] In some embodiments, the plurality of bearings comprises a plurality of first bearings, a plurality of second bearings and a plurality of third bearings arranged along the extending direction of the limiting slot, and between any two adjacent third bearings, one first bearing and one second bearing are arranged.
[0013] In some embodiments, the limiting slot extends along an arc.
[0014] According to another aspect of the present application, a digital subtraction angiography device is provided, comprising the rotation mechanism as described above.
[0015] The rotation mechanism of the embodiments of the present application sets the rotation arm on the holder, sets the limiting slot on the rotation arm, and uses the limiting slot to limit the rotation direction of the rotation arm relative to the holder. On this basis, a plurality of bearings are set on the holder, and each of the plurality of sequentially connected slot walls of the limiting slot is rotatably connected with a corresponding bearing. In this way, even if there is a machining error, the force direction and force position between each bearing and the limiting slot can be determined during the rotation of the rotation arm relative to the holder, and each of the plurality of slot walls of the limiting slot can be supported by the bearings, thereby improving the rotation stability of the rotation arm, improving the problem that the rotation arm is prone to shaking, and thereby improving the image quality. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0017] Figure 1 The structure schematic diagram of the rotation mechanism, the ball tube and the detector in an embodiment of the present application is shown.
[0018] Figure 2 A partial enlarged view of A in FIG. Figure 1 A partial enlarged view of A in FIG.
[0019] Figure 3 A partial enlarged view of A in FIG.
[0020] Figure 4 A partial enlarged view of A in FIG.
[0021] Figure 5 A partial enlarged view of A in FIG. Figure 4 A partial enlarged view of B in FIG.
[0022] BRIEF DESCRIPTION OF DRAWINGS
[0023] 1, rotating mechanism; 2, ball tube; 3, detector;
[0024] 10, retainer; 11, first section; 12, second section;
[0025] 20, bearing set; 21, first bearing; 22, second bearing; 23, third bearing; L1, first virtual reference line; L2, second virtual reference line;
[0026] 30, rotating arm; 31, limiting groove; 311, first side wall; 312, second side wall; 313, bottom wall. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the present application clearer, the following will further describe the embodiments of the present application in combination with the drawings.
[0028] The following description refers to the accompanying drawings. Unless otherwise indicated, like numbers in the various drawings of the drawings refer to the same or similar elements. The following description of the example embodiments is not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.
[0029] Digital subtraction angiography (DSA) is a medical device, mainly used for the diagnosis and treatment of vascular diseases. The device takes two pictures before and after the injection of contrast agent, and uses a computer to perform digital subtraction processing to eliminate the effects of bone and soft tissue, thereby obtaining a clear blood vessel image.
[0030] The digital subtraction angiography device usually comprises a C-shaped rotating arm, the two ends of the rotating arm are respectively fixed with a ball tube and a detector, and the rotating arm drives the ball tube and the detector and other components to move in the process of rotating around its axis, so as to obtain a blood vessel image. Therefore, the stability of the movement of the rotating arm directly affects the quality of the blood vessel image.
[0031] Considering that the two ends of the rotating arm are respectively provided with a ray generating assembly and a ray receiving assembly, both of which have a large mass, for example, about 60 kg, in order to enable the rotating arm to smoothly drive these large mass assemblies to move, in the related art, a limiting groove is arranged on the rotating arm, and a bearing is arranged on a holding frame for mounting the rotating arm, and the bearing and the limiting groove are matched to realize support during the rotation of the rotating arm.
[0032] However, in the process of high-speed rotation of the rotating arm, the two ends of the rotating arm are in a non-equilibrium state, and the center of gravity of the entire rotating arm changes with the high-speed rotation. In order to ensure the smoothness of the rotation of the bearing, the width of the limiting groove is greater than the diameter of the bearing, that is, there is a gap between the bearing and the groove wall of the limiting groove. Due to the existence of the gap and the influence of the machining precision, there is great uncertainty in the stress point between the bearing and the limiting groove, which causes the rotating arm to easily shake during rotation, causes the entire frame to vibrate, generates noise, and at the same time, adversely affects the quality of the blood vessel image, resulting in a decrease in image quality.
[0033] To solve the above problems, the application provides a rotating mechanism, by grouping the bearings, each groove wall of the limiting groove has a corresponding bearing rotating with it, that is, the multiple groove walls of the limiting groove in different directions are supported by the corresponding bearings. In this way, even if there is a machining error, the stress direction and stress position between each group of bearings and the limiting groove can be clearly determined, the rotating smoothness of the bearings is ensured, the rotating stability of the rotating arm is improved, the problem of easy shaking of the rotating arm is improved, and the image quality is improved.
[0034] Reference Figure 1 and Figure 2 The rotating mechanism 1 provided by the embodiment of the application comprises a holding frame 10, a bearing group 20, and a rotating arm 30. The holding frame 10 provides a mounting reference for the rotating arm 30, and the shape and size thereof can be selected according to the overall layout design of the rotating arm 30 and the digital subtraction angiography device, which is not limited herein. The rotating arm 30 provides a mounting reference and motion control for components such as a ball tube 2 and a detector 3 of the digital subtraction angiography device. The type and number of bearings in the bearing group 20 can be selected according to the size and mass of the holding frame 10 and the rotating arm 30, which is not limited herein.
[0035] Specifically, the bearing set 20 is arranged on the holder 10. The bearing set 20 comprises a plurality of bearings, which are of the same type or different types, and which are axially parallel or intersected.
[0036] The rotating arm 30 is arranged on the holder 10. The rotating arm 30 is provided with a limiting groove 31 having a plurality of groove walls connected in sequence. The rotating arm 30 can rotate along the extension direction of the limiting groove 31 relative to the holder 10, and each groove wall has a corresponding bearing rotatingly matched therewith. Based on this, even if there is a machining error, the force direction and force position between each bearing and the limiting groove 31 can be determined during the rotation of the rotating arm 30 relative to the holder 10. The plurality of groove walls of the limiting groove 31 can be supported by the bearings, which improves the rotation stability of the rotating arm 30 and solves the problem of easy shaking of the rotating arm 30, thereby improving the image quality.
[0037] With reference to Figure 2 In some embodiments, the plurality of groove walls comprises a first side wall 311 and a second side wall 312 opposite to each other. The first side wall 311 and the second side wall 312 opposite to each other comprise that both are parallel to each other, or both are located on two intersected planes respectively. The height of the first side wall 311 is the same as or different from the height of the second side wall 312 along the depth direction of the limiting groove 31.
[0038] The plurality of bearings comprises one or more first bearings 21 and one or more second bearings 22. The first bearings 21 are rotatingly matched with the first side wall 311, and the second bearings 22 are rotatingly matched with the second side wall 312. In other words, the first bearings 21 are in contact with and can rotate relative to the first side wall 311, and the second bearings 22 are in contact with and can rotate relative to the second side wall 312.
[0039] With reference to Figure 3 Exemplarily, the center line of the plurality of first bearings 21 extends along a first virtual reference line L1, and the center line of the plurality of second bearings 22 extends along a second virtual reference line L2. There is a gap between the first virtual reference line L1 and the second virtual reference line L2, and the gap between the two is equal along the extension direction.
[0040] Based on this, the two groove walls opposite to each other of the limiting groove 31 are both rotatingly matched with the bearings, which can support the rotating arm 30 on both sides at the same time, so that the rotating arm 30 can rotate more stably and is not easy to shake, thereby improving the image quality.
[0041] In some embodiments, the first bearing 21 is rotatably connected with the first side wall 311 and is spaced apart from the second side wall 312, so that a gap is reserved between the first bearing 21 and the second side wall 312, and the first bearing 21 can rotate more smoothly.
[0042] In some embodiments, the second bearing 22 is rotatably connected with the second side wall 312 and is spaced apart from the first side wall 311, so that a gap is reserved between the second bearing 22 and the first side wall 311, and the second bearing 22 can rotate more smoothly.
[0043] In some embodiments, the first bearing 21 is rotatably connected with the first side wall 311 and is spaced apart from the second side wall 312, and the second bearing 22 is rotatably connected with the second side wall 312 and is spaced apart from the first side wall 311, so that the first bearing 21 and the second bearing 22 can rotate more smoothly.
[0044] In some embodiments, the retainer 10 has the first section 11 and the second section 12 arranged along the extension direction of the limiting groove 31 in sequence, the first section 11 is directly or indirectly connected with the second section 12, and the length of the first section 11 along the extension direction of the limiting groove 31 is the same as or different from the length of the second section 12 along the extension direction of the limiting groove 31.
[0045] The plurality of bearings includes a plurality of first bearings 21 and a plurality of second bearings 22 arranged along the extension direction of the limiting groove 31. In the first section 11, the plurality of first bearings 21 and the plurality of second bearings 22 are alternately arranged along a first direction; in the second section 12, the plurality of first bearings 21 and the plurality of second bearings 22 are alternately arranged along a second direction; and the first direction is opposite to the second direction. In this way, along the extension direction of the first section 11 and along the extension direction of the second section 12, the first bearings 21 and the second bearings 22 are more evenly distributed, and the two side walls of the limiting groove 31 can more evenly support the first bearings 21 and the second bearings 22.
[0046] In some embodiments, the plurality of bearings includes a plurality of first bearings 21 and a plurality of second bearings 22, and the plurality of first bearings 21 and the plurality of second bearings 22 are alternately arranged along the extension direction of the limiting groove 31. In this way, along the extension direction of the limiting groove 31, the first bearings 21 and the second bearings 22 are more evenly distributed, and the two side walls of the limiting groove 31 can more evenly support the first bearings 21 and the second bearings 22.
[0047] Referring to Figure 1 and Figure 2In some embodiments, the plurality of slot walls further comprises a bottom wall 313 connected between the first side wall 311 and the second side wall 312, and the plurality of bearings further comprises one or more third bearings 23, which are in rotational cooperation with the bottom wall 313. In this way, the rotating arm 30 can also be stably supported along the depth direction of the limiting slot 31, so as to improve the stability of the rotation of the rotating arm 30, and further improve the problem of the shaking of the rotating arm 30, thereby improving the image quality.
[0048] In some embodiments, the axial direction of the first bearing 21 is parallel to the axial direction of the second bearing 22, and the axial direction of the first bearing 21 and the axial direction of the second bearing 22 are both intersected with, for example, perpendicular to the axial direction of the third bearing 23. In this way, the first bearing 21 and the second bearing 22 support the rotating arm 30 in two opposite directions, for example, the first bearing 21 and the second bearing 22 support the rotating arm 30 along the width direction of the limiting slot 31, and the third bearing 23 supports the rotating arm 30 along the depth direction of the limiting slot 31, so that the rotating arm 30 rotates more stably, thereby improving the problem of the shaking of the rotating arm 30, and further improving the image quality.
[0049] In some embodiments, the plurality of bearings comprises a plurality of first bearings 21, a plurality of second bearings 22, and a plurality of third bearings 23 arranged along the extension direction of the limiting slot 31, and between any two adjacent third bearings 23, one first bearing 21 and one second bearing 22 are arranged. In this way, the first bearing 21, the second bearing 22, and the third bearing 23 are arranged more uniformly, so that the support forces in different directions received by the rotating arm 30 are more uniformly distributed, thereby further improving the problem of the shaking of the rotating arm 30, and further improving the image quality.
[0050] Continuing to refer to Figure 1 and Figure 2 In some embodiments, the limiting slot 31 extends along an arc line. For example, the limiting slot 31 extends along a circular arc line, and the rotating arm 30 rotates around the central axis of the circular arc. In this way, the rotating arm 30 can rotate in a larger range and the rotation process is more stable.
[0051] Optionally, the widths of different sections of the limiting slot 31 along the extension direction of the limiting slot 31 are uniform. Optionally, the depths of different sections of the limiting slot 31 along the extension direction of the limiting slot 31 are uniform. In this way, the rotation process of the rotating arm 30 is more stable, thereby improving the problem of the shaking of the rotating arm 30, and further improving the image quality.
[0052] Optionally, the height of the bearing along the depth direction of the limiting slot 31 is less than the depth of the limiting slot 31, so that the limiting slot 31 can protect the bearing and prevent the bearing from being interfered by external structures during rotation.
[0053] In some embodiments, the two sides of the thickness direction of the rotating arm 30 are provided with limiting grooves 31, and the two sides of the limiting grooves 31 are provided with corresponding bearing groups 20. In this way, the stability of the rotating arm 30 during rotation can be further improved.
[0054] Optionally, the depth and width of the limiting grooves 31 on the two sides of the thickness direction of the rotating arm 30 are equal. Optionally, the number and type of bearings in the bearing groups 20 on the two sides of the thickness direction of the rotating arm 30 are equal. In this way, the stability of the rotating arm 30 during rotation can be further improved, thereby further improving the problem of easy shaking of the rotating arm 30 and improving the image quality.
[0055] In an exemplary embodiment, the rotating mechanism 1 includes a holder 10, a bearing group 20, and a rotating arm 30.
[0056] The rotating arm 30 extends along a circular arc, and the rotating arm 30 is provided with a limiting groove 31 that also extends along the circular arc. The limiting groove 31 has a first side wall 311 and a second side wall 312 opposite each other, and a bottom wall 313 connected between the first side wall 311 and the second side wall 312.
[0057] The bearing group 20 includes a plurality of first bearings 21, a plurality of second bearings 22, and a plurality of third bearings 23. The axial direction of the first bearing 21 is parallel to the axial direction of the second bearing 22, and the axial direction of the third bearing 23 is perpendicular to the axial direction of the first bearing 21 and the axial direction of the second bearing 22. The axial direction of the first bearing 21 and the axial direction of the second bearing 22 are parallel to the axial direction of the circular arc, and the axial direction of the third bearing 23 is parallel to the radial direction of the circular arc.
[0058] The first bearing 21 is in rotatable contact with the first side wall 311 and is spaced apart from the second side wall 312. The second bearing 22 is in rotatable contact with the second side wall 312 and is spaced apart from the second side wall 312. The third bearing 23 is in rotatable contact with the bottom wall 313.
[0059] In this way, the grouping design of the radial support bearings is realized, so that a part of the bearings are in contact with the inner arc side of the limiting groove 31, and another part of the bearings are in contact with the outer arc side of the limiting groove 31, that is, a part of the bearings are eccentrically designed relative to another part of the bearings. The eccentric design can be that the shaft of the bearing is an eccentric shaft, or the shaft of the bearing is a non-eccentric shaft, and the installation position of the entire bearing is offset.
[0060] Based on this, during the rotation of the rotating arm 30 relative to the holder 10, the plurality of groove walls of the limiting groove 31 can be supported by the bearings, thereby improving the rotation stability of the rotating arm 30 on the basis of ensuring the smoothness of the rotation of the bearings, improving the problem of easy shaking of the rotating arm 30, and thereby improving the image quality.
[0061] Based on the same inventive purpose, the application further provides a digital subtraction angiography device, which comprises the rotating mechanism 1 of the above-mentioned embodiments.
[0062] Optionally, the digital subtraction angiography device further comprises a detector 3 and a ball tube 2, which are arranged on the rotating arm 30 at intervals, for example, the rotating arm 30 extends along an arc, and the detector 3 and the ball tube 2 are respectively located at two ends of the arc. In the process of rotating the rotating arm 30 around its axis, the ball tube 2 and the detector 3 and other components are driven to move, so as to obtain a blood vessel image.
[0063] In the description of the application, it should be understood that the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. For those skilled in the art, the specific meanings of the above terms in the application can be understood according to the specific circumstances. In addition, in the description of the application, unless otherwise specified, "a plurality of" means at least two, for example, two, three, four and the like. "And / or", the association relationship between the associated objects, indicates that there can be three kinds of relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are a kind of "or" relationship.
[0064] The above disclosure is only the preferred embodiment of the application, which cannot limit the scope of the right of the application, so the equivalent changes made according to the claims of the application still belong to the scope covered by the application.
Claims
1. A rotating mechanism, characterized by comprising: The rotation mechanism comprises: a holder; a bearing set arranged on the holder, the bearing set comprising a plurality of bearings; a rotating arm arranged on the holder, the rotating arm being provided with a limiting slot, the rotating arm being capable of rotating along the extending direction of the limiting slot relative to the holder; wherein the limiting slot has a plurality of slot walls connected in sequence, each of the slot walls has a corresponding bearing rotatingly matched therewith.
2. The swivel mechanism of claim 1, wherein The plurality of slot walls comprises a first side wall and a second side wall opposite to each other; The plurality of bearings comprises a plurality of first bearings and a plurality of second bearings, the first bearings are rotatingly matched with the first side wall, and the second bearings are rotatingly matched with the second side wall.
3. The swivel mechanism of claim 2, wherein, The first bearings are arranged in a spaced manner relative to the second side wall; and / or The second bearings are arranged in a spaced manner relative to the first side wall.
4. The swivel mechanism of claim 2, wherein The holder has a first section and a second section arranged in sequence along the extending direction of the limiting slot; The plurality of bearings comprises a plurality of first bearings and a plurality of second bearings arranged along the extending direction of the limiting slot; In the first section, the plurality of first bearings and the plurality of second bearings are arranged in a first direction alternately; in the second section, the plurality of first bearings and the plurality of second bearings are arranged in a second direction alternately; wherein the first direction is opposite to the second direction.
5. The swivel mechanism of claim 2, wherein The plurality of bearings comprises a plurality of first bearings and a plurality of second bearings, the plurality of first bearings and the plurality of second bearings are arranged in a alternating manner along the extending direction of the limiting slot.
6. The swivel mechanism of claim 2, wherein, The plurality of slot walls further comprises a bottom wall connected between the first side wall and the second side wall; The plurality of bearings further comprises a plurality of third bearings, the third bearings are rotatingly matched with the bottom wall.
7. The swivel mechanism of claim 6, wherein, The axial direction of the first bearings is parallel to the axial direction of the second bearings, and the axial direction of the first bearings and the axial direction of the second bearings are both intersected with the axial direction of the third bearings.
8. The swivel mechanism of claim 6, wherein, The plurality of bearings comprises a plurality of first bearings, a plurality of second bearings, and a plurality of third bearings arranged along the extending direction of the limiting slot; Between any two adjacent third bearings, one first bearing and one second bearing are arranged.
9. The swivel mechanism of claim 1, wherein, The limiting slot extends along an arc line.
10. A digital subtraction angiography apparatus, characterized by, The rotation mechanism comprises any one of the rotation mechanisms according to claims 1-9.