Bearing structure and digital subtraction angiography equipment
By using a combination of drive gears and limiting components in the overhead DSA equipment, the problems of cable tangling and complex installation are solved, achieving the effects of simplified cable layout and reduced costs, while improving equipment safety and operational efficiency.
Patent Information
- Application Number
- CN202520274395.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing overhead DSA equipment is prone to cable tangling during use, which can cause damage or interfere with the movement of suspended components. In addition, its complex structure and difficult installation increase the operating steps and costs for medical staff.
The suspension components are connected by a drive gear and a first reduction component (such as an RV reducer or a hollow turntable) to provide torque and amplify the torque. Limiting components are set on the reduction component, and cables can pass through through an axially extended limiting channel, simplifying the cable layout.
It simplifies cable layout, reduces costs and installation difficulty, reduces the risk of cable tangling and interference with the movement of suspended components, and improves motion accuracy and safety.
Smart Images
Figure CN223695894U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of medical equipment, in particular to a bearing structure and a digital subtraction angiography device. BACKGROUND
[0002] A digital subtraction angiography device (DSA) includes a floor type and a ceiling type. The ceiling type DSA can perform translational motion and rotational motion relative to a patient support device, so as to more reasonably arrange auxiliary devices, provide a more flexible space station for medical staff, and provide a larger patient coverage range and less patient movement. However, in the use process, there is a risk that a cable is wound to be lost or interferes with the motion of a suspended component. CONTENT OF THE UTILITY MODEL
[0003] Embodiments of the present application provide a bearing structure and a digital subtraction angiography device, which are used to improve the problem that a cable is wound to be lost or interferes with the motion of a suspended component.
[0004] According to an aspect of the present application, embodiments of the present application provide a bearing structure, which includes a driving gear, a first speed reduction component, and a limiting piece. The driving gear is used to provide torque. The first speed reduction component includes a speed reduction component body, an input shaft, and an output shaft. The input shaft is connected with the driving gear. The output shaft is used to be connected with a load, so as to transmit the torque provided by the driving gear to the load. The limiting piece is arranged on the speed reduction component body. The limiting piece is provided with a limiting passage extending along an axial direction of the speed reduction component body. The limiting passage is configured to be used for passing a cable.
[0005] In some embodiments, the first speed reduction component is an RV speed reducer, or the first speed reduction component is a hollow rotary table, or the first speed reduction component is a slewing bearing.
[0006] In some embodiments, the speed reduction component body, the input shaft, the output shaft, and a central axis of the limiting passage are collinear.
[0007] In some embodiments, a central axis of the driving gear and a central axis of the speed reduction component body are parallel to each other and are spaced apart. An axial projection of the driving gear and an axial projection of the limiting passage do not overlap with each other.
[0008] In some embodiments, the deceleration component body is provided with a receiving cavity, the limiting member is inserted into the receiving cavity, and a first lubricating cavity for accommodating lubricant is formed between the outer wall of the limiting member and the inner wall of the receiving cavity; a first sealing ring is sleeved on the limiting member, and the first sealing ring abuts against the inner wall of the receiving cavity to seal one end of the first lubricating cavity in the axial direction.
[0009] In some embodiments, the bearing structure further comprises an input flange provided at the end of the deceleration component body in the axial direction, and the drive gear is mounted on the input flange.
[0010] In some embodiments, a second lubricating cavity for accommodating lubricant is provided between the end faces of the input flange and the deceleration component body that face each other, and a second sealing ring is provided between the end faces of the input flange and the deceleration component body that abut against each other to seal one end of the second lubricating cavity in the axial direction.
[0011] In some embodiments, the input flange is provided with a mounting hole, and the deceleration component body partially extends into the mounting hole; the bearing structure further comprises a skeleton oil seal that is sealingly mounted in the mounting hole to seal the other end of the second lubricating cavity in the axial direction.
[0012] In some embodiments, the bearing structure further comprises a housing that is sleeved on the body; and / or, the bearing structure further comprises a second deceleration component that is connected to the end of the drive gear that is away from the input shaft.
[0013] According to another aspect of the present application, a digital subtraction angiography device is provided, which comprises a suspension component and the aforementioned bearing structure, and the suspension component is connected to the output shaft.
[0014] The bearing structure of the embodiments of the present application connects the drive gear and the first deceleration component with the load such as the suspension component of the DSA device, realizes the bearing of the suspension component, provides driving force and amplifies torque, simplifies the overall structure, reduces installation errors and difficulties, and can improve the shaking problem in the movement process. The limiting member is provided on the first deceleration component, and the limiting member provides a channel for the cable to pass through through the axial extension of the limiting channel. Thus, since the cable directly passes through the limiting channel, no additional structure needs to be designed, the cable layout is simplified, the cost is reduced, and the operation steps of medical staff are simplified. Since the cable extends in the axial direction, the cable does not rotate or rotates with a smaller amplitude with the rotation of the suspension component, so that the cable is not easily entangled with each other or entangled with other components, thereby improving the problems of cable damage and interference with the movement of the suspension component in the rotation process of the suspension component without increasing the operation steps and cost of medical staff. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Fig. 1 A perspective view of a load-bearing structure according to an embodiment of this application is shown.
[0017] Fig. 2 A front view of a load-bearing structure according to an embodiment of this application is shown.
[0018] Fig. 3 A cross-sectional structural schematic diagram of the load-bearing structure in one embodiment of this application is shown.
[0019] Fig. 4 An exploded view of a load-bearing structure according to an embodiment of this application is shown.
[0020] Explanation of reference numerals in the attached figures:
[0021] 1. Load-bearing structure;
[0022] 10. Drive gear;
[0023] 20. First reduction gear; 21. Reduction gear body; 22. Input shaft; 23. Output shaft;
[0024] 30. Limiting component; 31. Limiting channel; 32. First lubrication chamber; 33. First sealing ring;
[0025] 40. Input flange; 41. Second lubrication chamber; 42. Second sealing ring;
[0026] 50. Oil seal with skeleton;
[0027] 60. Outer shell. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0029] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0030] Digital Subtraction Angiography (DSA) is a medical device mainly used for the diagnosis and treatment of vascular diseases. The device takes two images before and after the injection of contrast medium, uses a computer for digital subtraction processing to eliminate the effects of bone and soft tissue, and thus obtains a clear vascular image. The DSA device mainly includes a C-arm system, an X-ray generator system, a ball tube system, a detector system, and a patient support device, etc. It is divided into floor type and ceiling type.
[0031] Compared with the floor type, the ceiling type DSA device can perform translational motion and rotational motion in three directions relative to the patient support device, realize motion with multiple degrees of freedom, thus more reasonable layout of auxiliary equipment, provide more flexible space for medical staff to stand, and provide larger patient coverage and less patient movement.
[0032] Due to its suspended characteristics, the ceiling type DSA device belongs to Class III medical devices, and has very high safety requirements. The weight of the suspension component of the mainstream ceiling type DSA device is about 900 kg, so the support structure supporting the suspension component needs to be able to bear large weight and large bending moment.
[0033] The related art generally adopts a cross roller bearing to directly connect the suspension component, and uses the large axial load capacity and radial bending moment capacity of the cross roller bearing to support the weight of the suspension component. Then, the suspension component of the ceiling type DSA is connected to a power assembly through a reduction rotation structure to drive the translational or rotational motion of the suspension component.
[0034] Since the cross roller bearing itself is not a reducer, it cannot provide driving force or amplify torque, so a high-power driving motor and a larger reduction structure need to be connected to the front end of the cross roller bearing. The overall structure is complex and difficult to install.
[0035] In addition, due to the need for multidirectional motion, the cables of the ceiling type DSA device are prone to damage due to mutual entanglement or interference with the motion of other components. Therefore, the related art usually designs an additional drag chain structure to realize the cable routing design. Although the additional drag chain structure can improve the problem of cable damage and interference with the motion of the suspension component to some extent, it increases the additional operation steps of medical staff and increases the cost.
[0036] To solve the above problems, the present application provides a bearing structure including a driving gear and a reduction machine. The driving gear provides torque, and the reduction machine transmits the torque provided by the driving gear to a load such as a suspension component, thereby providing a redundant safety factor of the bearing capacity for the load. The structure is relatively simple, reducing the installation difficulty and installation error.
[0037] On this basis, the limiting member is further arranged on the speed reducer, and the axially extending limiting channel is arranged on the limiting member to pass through the cable. In this way, since the cable directly passes through the limiting channel, no additional structure needs to be designed, the cable layout is simplified, the cost is reduced, and the operation steps of medical staff are simplified. Moreover, since the cable extends along the axial direction, the cable does not rotate or has a small rotation range with the rotation of the suspension component, so that the cable is not easily entangled with each other or with other components, thereby improving the problems of cable damage and interference with the movement of the suspension component during the rotation of the suspension component without increasing the operation steps and cost of medical staff.
[0038] With reference to Figs. 1 to 4 The bearing structure 1 provided by the embodiment of the present application comprises a driving gear 10, a first speed reduction component 20, and a limiting member 30.
[0039] The driving gear 10 is used to provide torque. The first speed reduction component 20 comprises a speed reduction component body 21, an input shaft 22, and an output shaft 23, wherein the input shaft 22 and the output shaft 23 are arranged on the speed reduction component body 21, for example, the input shaft 22 and the output shaft 23 are arranged at the two axial ends of the speed reduction component body 21, respectively. The input shaft 22 is connected with the driving gear 10, and the output shaft 23 is used to be connected with a load, so as to transmit the torque provided by the driving gear 10 to the load through the first speed reduction component 20, thereby achieving the bearing effect of the suspension component while providing driving force and amplifying torque, simplifying the overall structure, reducing installation error and installation difficulty, and improving the shaking problem during movement.
[0040] The limiting member 30 is arranged on the speed reduction component body 21. Specifically, the limiting member 30 is arranged integrally or separately with the speed reduction component body 21. The limiting member 30 is provided with a limiting channel 31 extending along the axial direction of the speed reduction component body 21, and the limiting channel 31 is configured to pass through the cable. In this way, since the cable directly passes through the limiting channel 31, no additional structure needs to be designed, the cable layout is simplified, the cost is reduced, and the operation steps of medical staff are simplified. Moreover, since the cable extends along the axial direction, the cable does not rotate or has a small rotation range with the rotation of the suspension component, so that the cable is not easily entangled with each other or with other components, thereby achieving the problems of cable damage and interference with the movement of the suspension component during the rotation of the suspension component without increasing the operation steps and cost of medical staff.
[0041] In some embodiments, the first speed reduction component 20 is an RV (Rotary Vector) speed reducer. The RV speed reducer comprises a front stage of a planetary gear speed reducer and a rear stage of a cycloid speed reducer, has the characteristics of compact structure, large transmission ratio, large carrying capacity, high precision, low backlash, and belongs to a sealed integral mechanism. Based on this, the bearing structure 1 of the present embodiment not only can provide a larger carrying capacity for the load of the suspension component and the like, but also can reduce the machining and installation precision, and at the same time, can reduce the backlash between the transmission components and improve the motion precision.
[0042] In other embodiments, the first speed reduction component 20 is a hollow speed reducer. Optionally, the hollow speed reducer is a hollow turntable or a rotary support bearing. In this way, the present embodiment can be suitable for scenarios with relatively small loads, and can meet the hollow wiring requirements.
[0043] In some embodiments, the central axis of the speed reduction component body 21, the input shaft 22, the output shaft 23, and the limiting channel 31 are collinear. Based on this, when the load such as the suspension component rotates, since the cable passes through the rotation center, the risk of cable tangling and damaging or interfering with the movement of the suspension component can be eliminated. Alternatively, the cable is close to the rotation center, so the risk of cable tangling and damaging or interfering with the movement of the suspension component can be reduced.
[0044] In some embodiments, the central axis of the drive gear 10 and the central axis of the speed reduction component body 21 are parallel to each other and spaced apart, and the axial projection of the drive gear 10 and the axial projection of the limiting channel 31 do not overlap each other. In this way, the torque provided by the drive gear 10 can be stably transmitted to the first speed reduction component 20, and the movement of the drive gear 10 is not easy to interfere with the cable passing through the limiting channel 31.
[0045] In some embodiments, the speed reduction component body 21 is provided with a containing cavity, the limiting member 30 is inserted into the containing cavity, and a first lubricating cavity 32 for accommodating lubricant is formed between the outer wall of the limiting member 30 and the inner wall of the containing cavity. The first lubricating cavity 32 is used to accommodate lubricating grease and the like. A first sealing ring 33, such as an O-shaped sealing ring, is sleeved on the limiting member 30. The first sealing ring 33 abuts against the inner wall of the containing cavity to seal one end of the first lubricating cavity 32 in the axial direction.
[0046] Based on this, on the one hand, the limiting member 30 provides a limiting passage 31 for the cable, improving the problem of cable damage and interference with the movement of the suspension component during rotation; on the other hand, the limiting member 30 cooperates with the deceleration component body 21 and the first sealing ring 33 to realize the lubrication and sealing of the first deceleration component 20. In other words, the limiting member 30 provides a limiting passage 31 for the cable while also being reused as a sealing component of the first lubrication cavity 32. That is, one limiting member 30 simultaneously realizes two functions of the first deceleration component 20, simplifying the overall structure and reducing installation difficulty and cost.
[0047] In some embodiments, the bearing structure 1 further comprises an input flange 40 provided at the end of the deceleration component body 21 along the axial direction. Exemplarily, the input flange 40 is connected with the deceleration component body 21 through screws. The drive gear 10 is mounted on the input flange 40. In this way, the connection between the drive gear 10 and the deceleration component body 21 is realized through the input flange 40, which is simple in structure and stable in installation.
[0048] In some embodiments, a second lubrication cavity 41 for accommodating lubricant is provided between the end faces of the input flange 40 and the deceleration component body 21 facing each other. A second sealing ring 42, such as an O-shaped sealing ring, is provided between the end faces of the input flange 40 and the deceleration component body 21 abutting each other to seal one end of the second lubrication cavity 41 along the axial direction. In this way, the input flange 40 provides a mounting reference for the drive gear 10 while providing sealing for the second lubrication cavity 41, simplifying the overall structure and reducing cost.
[0049] Optionally, the input flange 40 is provided with a mounting hole, and the deceleration component body 21 partially extends into the mounting hole. The bearing structure 1 further comprises a skeleton oil seal 50 sealingly mounted in the mounting hole to seal the other end of the second lubrication cavity 41 along the axial direction. In this way, the mounting hole provides accurate installation positioning for the input shaft 22, and the skeleton oil seal 50 seals the mounting hole. Based on this, the skeleton oil seal 50 cooperates with the second sealing ring 42 to improve the sealing performance of the second lubrication cavity 41.
[0050] Optionally, the first lubrication cavity 32 and the second lubrication cavity 41 are in communication, so that the replacement and addition of lubricant are more convenient and fast.
[0051] Optionally, the first lubrication cavity 32 and the second lubrication cavity 41 are arranged along the axial direction of the deceleration component body 21, so that good lubrication effect can be achieved for different parts of the first deceleration component 20 along the axial direction.
[0052] Optionally, the first lubrication cavity 32 and the second lubrication cavity 41 are arranged along the radial direction of the deceleration component body 21, so that good lubrication effect can be achieved for different parts of the first deceleration component 20 along the radial direction.
[0053] In some embodiments, the bearing structure 1 further comprises a shell 60 sleeved on the body. Optionally, the shell 60 is sleeved on the body, and the shell 60 is fixed between the mounting flange by screws. Exemplarily, the shell 60 is a cylindrical structure, and the thickness of the cylinder wall can be selected according to strength calculation and FEM (Finite Element Method) simulation. Based on this, the shell 60 can provide higher strength support for the first speed reduction component 20.
[0054] In some embodiments, the bearing structure 1 further comprises a second speed reduction component connected to the end of the drive gear 10 away from the input shaft 22. Exemplarily, a speed reduction mechanism such as a synchronous belt, a chain drive, etc. can be added at the front end of the drive gear 10 according to design requirements, and the reasonable motor power and total speed ratio are calculated by comprehensively considering factors such as load required torque, inertia matching, etc.
[0055] In some embodiments, the RV speed reducer is a split structure, and one or more of the speed reduction component body 21, the shell 60, the limiting piece 30, the input flange 40, the skeleton oil seal 50, the first sealing ring 33, and the second sealing ring 42 are independent components that need to be assembled before use and filled with lubricating grease. In this way, the assembled RV speed reducer has the advantages of small size, low self-weight, and compact structure.
[0056] In some embodiments, the RV speed reducer is a whole structure, that is, the speed reduction component body 21, the shell 60, the limiting piece 30, the input flange 40, the skeleton oil seal 50, the first sealing ring 33, the second sealing ring 42, and the packaged lubricating grease are combined structures provided by the manufacturer. In this way, the installation time can be saved.
[0057] In an exemplary embodiment, the bearing structure 1 comprises the drive gear 10, the first speed reduction component 20, the limiting piece 30, the input flange 40, the shell 60, the skeleton oil seal 50, the first sealing ring 33, and the second sealing ring 42.
[0058] The first speed reduction component 20 is specifically an RV speed reducer, and the first speed reduction component 20 comprises the input shaft 22, the speed reduction component body 21, and the output shaft 23 arranged coaxially in sequence, the input shaft 22 is connected with the drive gear 10, and the output shaft 23 is used for connecting the load. Among them, the RV speed reducer itself can provide a larger speed ratio, and combined with the speed ratio between the drive gear 10 and the input shaft 22 of the RV speed reducer, a two-stage speed reduction structure is formed. It can be understood that the speed ratio design can comprehensively consider factors such as design speed, start-stop control, and inertia matching, which are not limited here. Based on this, the bearing function of the suspension component is realized while providing driving force and amplifying torque.
[0059] The deceleration component body 21 is provided with a containing cavity penetrating through itself along the axial direction, the limiting member 30 is inserted into the containing cavity, and the limiting member 30 is provided with a limiting passage 31 coaxial with the deceleration component body 21. The first lubricating cavity 32 for containing lubricant is formed between the outer wall of the limiting member 30 and the inner wall of the containing cavity.
[0060] The input flange 40 is arranged at the end of the first deceleration component 20 along the axial direction, and the driving gear 10 is mounted on the input flange 40. The shell 60 is sleeved on the deceleration component body 21, and one end of the shell 60 is sleeved on the input flange 40.
[0061] The input flange 40 is provided with a mounting hole, and the input shaft 22 partially extends into the mounting hole. The second lubricating cavity 41 for containing lubricant is arranged between the end faces of the input flange 40 and the deceleration component body 21 facing each other, and the first lubricating cavity 32 and the second lubricating cavity 41 are communicated.
[0062] The first sealing ring 33 and the skeleton oil seal 50 are arranged at the two axial ends of the limiting member 30, respectively. The first sealing ring 33 is sleeved on the limiting member 30, for example, the outer wall of the limiting member 30 is provided with a first annular groove, the first sealing ring 33 is clamped in the first annular groove, and the first sealing ring 33 abuts against the inner wall of the containing cavity. The skeleton oil seal 50 is mounted in the mounting hole and located at the end of the input shaft 22 away from the deceleration component body 21. The second sealing ring 42 is arranged between the end faces of the input flange 40 and the deceleration component body 21 abutting against each other, for example, the end face of the deceleration component body 21 facing the input flange 40 is provided with a second annular groove, the second sealing ring 42 is clamped in the second annular groove, and abuts against the end face of the input flange 40 facing the deceleration component body 21. Based on this, the combination of the hollow tubular structure of the limiting member 30, the first sealing ring 33, the second sealing ring 42 and the skeleton oil seal 50 not only can lubricate and seal the first deceleration component 20, but also can provide the limiting passage 31 for the cable.
[0063] Based on the same inventive purpose, the application also provides a digital subtraction angiography device, which comprises a suspension component and the bearing structure 1 of the above-mentioned embodiments, wherein the suspension component is connected with the output shaft 23.
[0064] In the description of the present application, it needs to be understood that the terms "first", "second" and the like are only used for the purpose of description and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, "a plurality of" means at least two, for example, two, three, four, and the like, unless otherwise specified. The association relationship of the associated objects is described, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.
[0065] The above disclosure is only the preferred embodiment of the present application, which cannot limit the scope of the right of the present application, so the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.
Claims
1. A load bearing structure, characterized by The bearing structure comprises: a driving gear for providing torque; a first speed reduction component comprising a speed reduction component body and an input shaft and an output shaft provided on the speed reduction component body, the input shaft being connected with the driving gear, and the output shaft being used for being connected with a load to transmit the torque provided by the driving gear to the load; a limiting member provided on the speed reduction component body, the limiting member being provided with a limiting channel extending along an axial direction of the speed reduction component body, and the limiting channel being configured for allowing a cable to pass through.
2. The load bearing structure of claim 1, wherein, The first speed reduction component is an RV speed reducer; or The first speed reduction component is a hollow rotating table; or The first speed reduction component is a slewing bearing.
3. The load bearing structure of claim 1, wherein, The central axis of the speed reduction component body, the input shaft, the output shaft and the limiting channel are collinear.
4. The load bearing structure of claim 3, wherein, The central axis of the driving gear and the central axis of the speed reduction component body are parallel to each other and are spaced apart; The axial projection of the driving gear and the axial projection of the limiting channel do not overlap each other.
5. The load bearing structure of claim 1, wherein, The speed reduction component body is provided with a receiving cavity, the limiting member is inserted into the receiving cavity, and a first lubricating cavity for accommodating a lubricant is formed between the outer wall of the limiting member and the inner wall of the receiving cavity; A first sealing ring is sleeved on the limiting member, and the first sealing ring abuts against the inner wall of the receiving cavity to seal one end of the first lubricating cavity along the axial direction.
6. The load bearing structure of claim 1, wherein, The bearing structure further comprises an input flange provided on the end of the speed reduction component body along the axial direction, and the driving gear is mounted on the input flange.
7. The load bearing structure of claim 6, wherein, A second lubricating cavity for accommodating a lubricant is provided between the end faces of the input flange and the speed reduction component body which face each other; A second sealing ring is provided between the end faces of the input flange and the speed reduction component body which abut against each other to seal one end of the second lubricating cavity along the axial direction.
8. The load bearing structure of claim 7, wherein, The input flange is provided with a mounting hole, and the speed reduction component body partially extends into the mounting hole; The bearing structure further comprises a skeleton oil seal which is sealingly mounted in the mounting hole to seal the other end of the second lubricating cavity along the axial direction.
9. The load bearing structure of claim 1, wherein, The bearing structure further comprises a housing which is sleeved on the body; and / or The bearing structure further comprises a second speed reduction component which is connected to one end of the driving gear away from the input shaft.
10. A digital subtraction angiography apparatus, characterized by, The bearing structure comprises a suspension component and the bearing structure according to any one of claims 1-9, and the suspension component is connected with the output shaft.