CN211715717U - Joint bearing transmission device and medical imaging equipment - Google Patents

Abstract

The utility model provides a joint bearing transmission and medical imaging equipment. The joint bearing transmission device is applied to medical imaging equipment and comprises a motor for outputting power, a speed reducer connected with the motor, a speed reducer output end cover rotatably connected with the speed reducer and an adapter plate connected to a load, wherein one of a key groove and a key is arranged on the speed reducer output end cover, the other of the key groove and the key is arranged on the adapter plate, the key groove has axial depth, the key has axial thickness, and the key groove is accommodated in the key, so that the power output by the motor is transmitted to the adapter plate from the speed reducer output end cover through the matching of the key groove and the key. The utility model discloses a joint bearing transmission and medical imaging equipment have advantages such as high rigidity, high transmission precision, with low costs, simple structure, simple to operate.

Description

Joint bearing transmission device and medical imaging equipment

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a joint bearing transmission and medical imaging equipment.

Background

A relatively common medical imaging device is an X-ray medical imaging device, wherein a large real-time X-ray medical imaging device, such as a blood tube machine, can perform imaging of various blood vessels of the whole body, such as cardiovascular vessels, cerebrovascular vessels, aorta, abdominal organ vessels, pelvic vessels, and limb vessels. It has definite diagnosis value for vascular lesion and tumor lesion of all parts of human body, and can also complete interventional therapy for the lesions of all parts of the whole body.

The main frame part of the blood vessel used for interventional therapy is the main component of the blood vessel machine. Fig. 1 discloses a schematic diagram of a conventional vascular machine mainframe. As shown in fig. 1, a bulb 101 and a detector 102 mounted on a blood vessel main frame are core components of blood vessel machine imaging. In order to obtain accurate and clear continuous lesion images, the bulb 101 and the detector 102 are high-power precision devices, which may cause the problem that the weight of the whole image chain 103 is over 100Kg as the end of the transmission chain, and the power transmission process through the transmission mechanism is required when the weight reaches the end of the image chain 103 from the installation base of the device. Because the image chain 103 is heavy, if the rigidity of each joint is insufficient, the central deviation caused by insufficient stability and large deformation of the end image chain 103 is too large, and the imaging is seriously deviated. Meanwhile, due to the problems of precision and rigidity of mechanical transmission elements such as a speed reducer, transmission errors are inevitably generated at each joint, the accumulated errors of each joint can seriously affect the imaging quality, deviation can be generated on the diagnosis of doctors, and further serious damage can be generated on the treatment process of the patient 200, so that the rigidity of a transmission system and the precision of transmission are ensured, and the method is very critical in the design of DSA (Digital Subtraction Angiography) equipment.

As shown in fig. 1, in the conventional transmission mechanism, a base is installed on the ground or suspended on a top plate, a multi-joint design structure is adopted, a servo motor, a planetary reducer, a chain transmission (or a gear transmission) + a load are adopted in the joint structure, an L arm 104 and the above components rotate around an axis a in the vertical direction, an image chain 103 rotates around an axis B in the horizontal direction, and a bed plate 105 moves in the transverse direction, the longitudinal direction and the lifting direction, so that the three-dimensional scanning of the image chain 103 around a focus of a patient 200 is realized.

Although the existing transmission mechanism is low in cost, simple in structure and convenient to operate, because the return clearance of the planetary reducer in the existing transmission mechanism is large, a large torque needs to be borne between an output shaft and a load, in the process of sudden start and sudden stop, the system is easy to shake, the movement precision is influenced, and the longer the service time is, the worse the precision is.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a joint bearing transmission and medical imaging equipment with high rigidity, high transmission precision.

An aspect of the utility model provides a joint bearing transmission, it is applied to in the medical imaging equipment. The knuckle bearing transmission device comprises a motor for outputting power, a speed reducer connected with the motor, a speed reducer output end cover rotatably connected with the speed reducer and a switching disc for being connected to a load, wherein one of a key groove and a key is arranged on the speed reducer output end cover, the other of the key groove and the key is arranged on the switching disc, the key groove is provided with an axial depth, the key is provided with an axial thickness, and the key groove is accommodated in the key, so that the power output by the motor is transmitted to the switching disc from the speed reducer output end cover through the matching of the key groove and the key.

Furthermore, the joint bearing transmission device further comprises a slewing bearing, the slewing bearing is provided with an inner ring and an outer ring, and the load is connected to the outer ring of the slewing bearing through the adapter disc.

Further, the joint bearing transmission device further comprises a speed reducer housing, the speed reducer is accommodated in the speed reducer housing, and the inner ring of the slewing bearing is mounted on the speed reducer housing.

Further, the joint bearing transmission device further comprises a mounting frame installed in the speed reducer shell, and the input shaft of the speed reducer is rotatably accommodated in the mounting frame.

Further, the reducer comprises an RV reducer.

Further, the motor comprises a servo motor, the joint bearing transmission device further comprises a second speed reducer located at the front stage of the speed reducer, and the speed reducer is connected to the motor through the second speed reducer.

Further, the second speed reducer comprises a worm gear speed reducer.

Further, the output shaft of the motor and the input shaft of the speed reducer are in a right-angle relationship.

Further, the shape of the key slot and the key comprises a straight line shape or a cross shape.

The utility model discloses a joint bearing transmission passes through the key transmission mode that keyway and key matched with each other, has solved two links of drive mechanism and bearing structure and can the self-adaptation installation under the condition that has machining error. The connection mode can realize large-torque, high-precision and high-rigidity power transmission within the range accepted by the system.

Another aspect of the present invention provides a medical imaging apparatus, which includes a frame and a rotatable arm connected to the frame and having an image chain, wherein the frame includes one or more joint bearing transmission devices as described above, and the one or more joint bearing transmission devices transmit power output from a motor to the image chain.

The utility model discloses a joint bearing transmission and medical imaging equipment have small, light in weight, the drive ratio scope is big, longe-lived, precision remain stable, efficient, the transmission is steady, the impact resistance is strong, the moment of torsion is big, positioning accuracy is high, the vibration is little, a series of advantages such as the reduction ratio is big.

Furthermore, the utility model discloses a joint bearing transmission and have this joint bearing transmission's medical imaging equipment cost is controllable, simple structure, simple to operate, the maintenance of being convenient for.

Drawings

Fig. 1 is a schematic diagram of a conventional vascular machine mainframe;

fig. 2 is a partially exploded schematic view of a spherical plain bearing transmission according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a spherical plain bearing transmission according to an embodiment of the present invention;

fig. 4 is a schematic exploded perspective view of the output end cover and the adapter plate of the speed reducer shown in fig. 2;

FIG. 5 is a cross-sectional view of the assembled reducer output end cap and adapter plate shown in FIG. 4;

fig. 6 is a schematic view of a medical imaging apparatus according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Fig. 2 shows a partially exploded view of the joint bearing transmission 3 according to an embodiment of the present invention, and fig. 3 shows a cross-sectional view of the joint bearing transmission 3 according to an embodiment of the present invention. As shown in fig. 2 and 3, the joint bearing transmission device 3 according to an embodiment of the present invention can be applied to a medical imaging apparatus, and includes a motor 31 and a speed reducer 32. The motor 31 is used to output power, and in one embodiment, the motor 31 may comprise a servo motor, for example.

The speed reducer 32 is connected to the motor 31. In one embodiment, the speed reducer 32 of the present invention may be, for example, a high-precision RV speed reducer with zero backlash. The RV reducer consists of a front stage of a planetary gear reducer and a rear stage of a cycloidal pin gear reducer, has a compact structure and a large transmission ratio, has a self-locking function under a certain condition, and has the advantages of small vibration, low noise and low energy consumption. The RV reducer can provide high transmission accuracy relative to existing planetary reducers. In other embodiments, the speed reducer 32 of the present invention may also be replaced by a harmonic speed reducer or other speed reducers with slightly poor performance and similar structures.

The utility model discloses a joint bearing transmission 3 is applied to the DSA field with the RV speed reducer, provides a big moment of torsion, can guarantee the joint design structure of high rigidity and high transmission precision simultaneously, can improve performance parameters such as precision, rotational speed, scram of equipment by a wide margin. Moreover, the noise silencing effect of the RV reducer is good, so that the noise of the whole machine is reduced.

In other embodiments, the joint bearing transmission device 3 of the present invention may further include a second speed reducer 33, and the second speed reducer 33 may include a worm gear speed reducer, for example, but may also be replaced by another type of speed reducer. The second reduction gear 33 is located at a preceding stage of the reduction gear 32, the second reduction gear 33 is connected to the motor 31, and the reduction gear 32 is connected to the motor 31 through the second reduction gear 33. The second reducer 33 may provide a first reduction and the reducer 32 may provide a second reduction, thereby providing the appropriate torque to the load 4.

In one embodiment, the output shaft of the motor 31 is in a right angle relationship with the input shaft 320 of the reducer 32. In the embodiment shown in fig. 2, the second speed reducer 33 is a right-angle speed reducer, the second speed reducer 33 is connected with the motor 31, and the speed reducer 32 is connected to the motor 31 through the second speed reducer 33, so that the motor 31 and the speed reducer 32 are mounted at a right angle. However, the present invention is not limited to the right-angle installation form, and in other embodiments of the present invention, the motor 31 and the speed reducer 32 may also adopt a coaxial installation form.

The utility model discloses a joint bearing transmission 3 adopts the combination form of servo motor + high accuracy worm gear speed reducer + RV speed reducer, and servo motor can provide the angle input of high accuracy, and the worm gear speed reducer realizes slowing down and switching-over function, and the RV speed reducer can realize second grade speed reduction and zero return clearance. The components can ensure the transmission rigidity and precision of the system to the maximum extent, realize large torque transmission, ensure the stable output of the system under the emergency starting and stopping conditions, ensure the safety and meet the requirements of regulations.

The utility model discloses a joint bearing transmission 3 includes speed reducer output end cover 34 and switching dish 35. The reducer output end cap 34 is rotatably connected to the reducer 32. The adapter plate 35 is intended to be connected to the load 4. Fig. 4 is a schematic perspective exploded view of the reducer output end cover 34 and the adapter plate 35 according to an embodiment of the present invention, and fig. 5 is a cross-sectional view of the reducer output end cover 34 and the adapter plate 35 shown in fig. 4 after assembly. As shown in fig. 4 and 5, in some embodiments, a linear groove is provided as a key groove 340 on the bottom end of the reducer output end cover 34, and the key groove 340 has an axial depth. Correspondingly, a linear strip is provided as a key 350 on the adapter plate 35, the key 350 having an axial thickness. The key groove 340 on the reducer output end cover 34 can be accommodated in the key 350 of the adapter plate 35, so that the power output by the motor 31 can be output from the reducer output end cover 34 and transmitted to the adapter plate 35 through the matching of the key groove 340 of the reducer output end cover 34 and the key 350 of the adapter plate 35, the adapter plate 35 is connected with the load 4, and the load 4 is driven to rotate, so that the torque transmission is realized.

During processing, the gap between the key groove 340 of the reducer output end cover 34 and the key 350 of the adapter plate 35 is controlled within an acceptable range of system rigidity, and certain surface hardness is ensured, so that the service life is prolonged.

The key 350 and the key groove 340 of the present invention are not limited to a straight shape, and may be connected in a cross shape or other forms. Furthermore, the present invention is not limited to the key groove 340 on the reducer output end cover 34 and the key 350 on the adapter 35. The utility model discloses an in other embodiments, also can set up the key on speed reducer output end cover 34, and set up the keyway on switching dish 35, can reach key and keyway complex effect equally. These minor structural changes do not alter the inventive idea, which will still be within the scope of the present invention.

With continued reference to fig. 2 and 3, the spherical plain bearing gear assembly 3 further includes an adapter flange 39, a mounting bracket 38, a gear housing 37, and a slew bearing 36. The second reduction gear unit 33 is fixed to the mount 38 by the adapter flange 39, the output shaft 330 of the second reduction gear unit 33 is inserted into the input shaft 320 of the reduction gear unit 32, the input shaft 320 of the reduction gear unit 32 is rotatably received in the mount 38, and the mount 38 is mounted in the reduction gear unit case 37. The reduction gear 32 is housed in a reduction gear case 37. The slewing bearing 36 has an inner ring and an outer ring, the inner ring of the slewing bearing 36 is mounted on the speed reducer housing 37, and the load 4 is connected to the lower surface of the outer ring of the slewing bearing 36 through the adapter 35, thereby constituting a very rigid support structure. The utility model discloses a slew bearing 36 have that antidumping moment is big, axial load is big, take the structural feature of axial pretension, especially adapted DSA equipment big unbalance loading service environment's application. The utility model discloses a joint bearing transmission 3 passes through slewing bearing 36 and is connected with output load 4, can ensure that load 4 can bear very big unbalance loading moment, guarantees the rigidity of system.

The utility model discloses an among the joint bearing transmission 3, by motor 31 output power, export for second speed reducer 33 via shaft coupling (not shown), export again for speed reducer 32's input shaft 320, after slowing down through speed reducer 32, speed reducer output end cover 34 is given to the output torque, and the key groove 340 of rethread speed reducer output end cover 34 and the cooperation of the key 350 of switching dish 35, export the moment of torsion from speed reducer output end cover 34 to switching dish 35, and then export for load 4.

The utility model discloses a joint bearing transmission 3 adopts slew bearing 36 that has big load capacity, cooperates the RV speed reducer of high transmission precision, realizes high rigidity and high accuracy simultaneously to provide the moment of torsion much higher than ordinary drive mechanism, the guarantee system can accomplish quick response.

The utility model discloses a joint bearing transmission 3 includes drive mechanism link and bearing structure link, and two links are walked respectively to drive mechanism and bearing structure. The transmission mechanism link comprises a motor 31, a second speed reducer 33, a mounting frame 38, a speed reducer 32 and a speed reducer output end cover 34, and the support structure link comprises a speed reducer shell 37, a rotary bearing 36 and an adapter 35. The two links need to be connected together before being output to the load 4 to ensure that torque is delivered to the load 4. However, the axial dimension chains are difficult to be consistent due to the problem of machining precision, when the ends are converged together, the mounting surface has a step difference, and if the ends are fixed by adopting a hard connection mode, the bearing is pressed to be dead and cannot rotate. If the machining precision of the machined part and the precision of the component are improved, the cost is greatly increased. The utility model discloses a joint bearing transmission 3 is through setting up keyway 340 on speed reducer output end cover 34 and set up key 350 on switching dish 35, through the key transmission mode of keyway 340 and key 350 mutually supporting, has solved two links of drive mechanism and bearing structure and can the self-adaptation installation under the condition that has machining error. The connection mode can realize large-torque, high-precision and high-rigidity power transmission within the range accepted by the system.

The joint bearing transmission device 3 of the utility model has greatly improved rigidity, and can ensure the stability of the system during 3D scanning; the transmission precision is greatly improved, and the repeated positioning precision within +/-0.2 degrees can be realized; the rotating speed of the 3D scanning is greatly improved compared with that of the existing DSA equipment; and the processing precision requirement is reduced, and the processing cost is reduced.

The utility model also provides a medical imaging equipment. Fig. 6 shows a schematic diagram of a medical imaging apparatus 300 according to an embodiment of the present invention. As shown in fig. 6, the medical imaging device 300 may comprise, for example, a blood vessel machine, which includes a frame 301 and a rotatable arm, such as a rotatable C-arm 303, connected to the frame 301, to which an image chain 302 is mounted. The frame 301 includes one or more joint bearing transmission devices 3 as described above, and the power output from the motor 31 is transmitted to the image chain 302 through the one or more joint bearing transmission devices 3, so that the image chain 302 can be driven to move. In one embodiment, the medical imaging apparatus 300 may be a suspension structure, the frame 301 includes a suspension base 304, a first rotating arm 305 and a second rotating arm 306, and the frame 301 includes an L1 axle joint bearing transmission device 3, an L2 axle joint bearing transmission device 3 and a P axle joint bearing transmission device 3. The suspension base 304 is connected to the first rotating arm 305 through an L1 pivot joint bearing transmission device 3, and the first rotating arm 305 can rotate the rotatable C-arm 303 with the image chain 302 installed thereon in an L1 axis (e.g., vertical direction). The first rotating arm 305 is connected to the second rotating arm 306 through the L2 pivot joint bearing transmission device 3, and the second rotating arm 306 can rotate the rotatable C-arm 303 with the image chain 302 mounted thereon in the L2 axis (e.g., vertical direction). The second rotating arm 306 is connected to the rotatable C-arm 303 through the P-axis joint bearing transmission device 3, and the rotatable C-arm 303 can drive the image chain 302 to rotate in the P-axis (e.g. horizontal direction).

In another embodiment, the medical imaging apparatus 300 of the present invention may also be a floor-type structure. In the floor standing configuration, the stand 301 includes a floor standing base and may include an L2 axle knuckle bearing transmission 3 and a P axle knuckle bearing transmission 3. The power output from the motor is transmitted to the image chain 302 through the L2 shaft joint bearing transmission device 3 and the P shaft joint bearing transmission device 3.

The above are only some exemplary structures of the medical imaging apparatus 300 of the present invention. However, the medical imaging apparatus 300 of the present invention is not limited thereto.

The medical imaging device 300 of the present invention has substantially similar advantageous effects to those of the joint bearing transmission device 3, and therefore, the description thereof is omitted.

The utility model discloses a joint bearing transmission 3 and have this joint bearing transmission 3's medical imaging equipment 300 have small, light in weight, transmission ratio scope is big, longe-lived, precision remain stable, efficient, the transmission is steady, impact resistance is strong, the moment of torsion is big, positioning accuracy is high, the vibration is little, a series of advantages such as the reduction ratio is big.

Furthermore, the utility model discloses a joint bearing transmission 3 and have this joint bearing transmission 3's medical imaging equipment 300 cost is controllable, simple structure, simple to operate, the maintenance of being convenient for.

The joint bearing transmission device and the medical imaging device provided by the utility model are introduced in detail. The joint bearing transmission device and the medical imaging device of the present invention are explained herein by applying specific embodiments, and the explanation of the above embodiments is only used to help understand the core idea of the present invention, and is not used to limit the present invention. It should be noted that, for those skilled in the art, without departing from the spirit and principle of the present invention, several improvements and modifications can be made to the present invention, and all such improvements and modifications should fall within the scope of the appended claims.

Claims (10)

1. A joint bearing transmission device is applied to medical imaging equipment and is characterized in that: the knuckle bearing transmission device comprises a motor for outputting power, a speed reducer connected with the motor, a speed reducer output end cover rotatably connected with the speed reducer and a switching disc for being connected to a load, wherein one of a key groove and a key is arranged on the speed reducer output end cover, the other of the key groove and the key is arranged on the switching disc, the key groove is provided with an axial depth, the key is provided with an axial thickness, and the key groove is accommodated in the key, so that the power output by the motor is transmitted to the switching disc from the speed reducer output end cover through the matching of the key groove and the key.

2. The spherical plain bearing transmission of claim 1, wherein: the rotary bearing is provided with an inner ring and an outer ring, and the load is connected to the outer ring of the rotary bearing through the adapter disc.

3. The spherical plain bearing transmission of claim 2, wherein: the speed reducer is accommodated in the speed reducer shell, and the inner ring of the slewing bearing is mounted on the speed reducer shell.

4. The spherical plain bearing transmission of claim 3, wherein: the speed reducer is characterized by further comprising a mounting frame arranged in the speed reducer shell, and the input shaft of the speed reducer is rotatably contained in the mounting frame.

5. The spherical plain bearing transmission of claim 1, wherein: the speed reducer comprises an RV speed reducer.

6. The spherical plain bearing transmission of claim 1, wherein: the motor comprises a servo motor, the joint bearing transmission device further comprises a second speed reducer located at the front stage of the speed reducer, and the speed reducer is connected to the motor through the second speed reducer.

7. The spherical plain bearing transmission of claim 6, wherein: the second speed reducer comprises a worm gear speed reducer.

8. The spherical plain bearing transmission of claim 1, wherein: the output shaft of the motor and the input shaft of the speed reducer are in a right-angle relationship.

9. The spherical plain bearing transmission of claim 1, wherein: the shape of the key slot and the key comprises a straight line shape or a cross shape.

10. A medical imaging apparatus, comprising: the image chain transmission device comprises a machine frame and a rotatable arm which is connected with the machine frame and is provided with an image chain, wherein the machine frame comprises one or more joint bearing transmission devices according to any one of claims 1 to 9, and power output by a motor is transmitted to the image chain through the one or more joint bearing transmission devices.

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