DE202019105746U1 - Clamping device, omega drive device, medical imaging and imaging system - Google Patents

Abstract

Clamping device (1) for a toothed belt (13) of an omega drive device (10), having a profile part (3) which has a shape complementary to at least one end section of the toothed belt (13), so that the end section of the toothed belt (13 ) is positively fastened to the profile part (3), wherein the profile part (3) on a lever (2) is fastened or fastened, which is pivotally mounted about a rotation axis (D).

Description

The invention relates to a clamping device for an omega drive device. The invention further relates to an omega drive device with such a tensioning device, an imaging medical device with such an omega drive device and an imaging system with such an imaging medical device.

So-called omega drive devices are known from the prior art, which are designed to adjust a component along a tensile load-bearing actuating means, in particular toothed belt. The actuator or timing belt must be held under tension to ensure correct operation of the omega drive.

Starting from this prior art, the present invention has for its object to provide a clamping device for an omega drive device, which has a low space requirement.

This object is achieved by a clamping device having the features of claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

A tensioning device for a toothed belt of an omega drive device comprises a profile part, which has a shape complementary to at least one end section of the toothed belt. The end section of the toothed belt can be fastened in a form-fitting manner to the profile part. The profile part is attached or attachable to a lever which is pivotally mounted about a rotation axis.

By folding or diverting the toothed belt attached to the lever by means of the profile part, it can be tensioned or put under tension. The belt tension is adjusted, for example, by means of a suitable tool, in particular a torque wrench. The clamping device is to be arranged on the end side of the toothed belt and therefore takes up little space to complete. Since the clamping device comprises only relatively few components, a particularly cost-effective implementation is also specified. Due to the end-side attachment of the timing belt can be adjusted in a very simple manner in terms of its location.

In embodiments, the lever is adapted to tension the toothed belt by folding about the axis of rotation by an angle of 70 ° to 110 °, preferably by an angle of about 90 °. In other words, the toothed belt is deflected by the lever by a relatively large angle, so that a sufficient tensile load along its longitudinal extent can be exerted on this. A deflection of the toothed belt by an angle of at least 70 °, preferably of about 90 °, also ensures a sufficient attachment.

In embodiments, the folded-over lever can be locked by means of a locking means, in particular by means of a screw connection.

In embodiments, the lever has a rounded portion, wherein the tensioned toothed belt is guided over the rounded portion. The strained toothed belt is thus not guided in particular over a workpiece edge, but over the rounded portion in order to avoid damage. The deflection of the toothed belt by the aforementioned angle of at least 70 °, preferably of about 90 °, takes place in particular in the region of the rounded portion of the lever.

In embodiments, the profile part has a plurality of mutually parallel grooves for receiving complementarily formed webs of the toothed belt. The webs of the toothed belt are thus positively inserted into the grooves of the profile part.

In embodiments, the profile part on the lever is frictionally fastened. The frictional connection takes place in particular by applying force in a direction substantially perpendicular to the longitudinal extent of the toothed belt direction.

In embodiments, the profile part can be fastened to the lever by means of a screw connection. The frictional connection to the frictional attachment of the toothed belt to the clamping device can be mediated in particular by means of the screw connection.

An omega drive device, in particular for an imaging medical device, comprises at least one of the tensioning devices described above.

In embodiments, the at least one clamping device is arranged on one end of a circular arc guide of the omega drive device. The toothed belt is guided along the circular arc guide and the at least one tensioning device is designed to exert a tensile stress on the toothed belt guided along the circular arc guide.

In embodiments, another clamping device on the circular arc guide end and the at least one clamping device arranged opposite one another. The further tensioning device is designed to exert a tensile stress on the toothed belt guided along the circular arc guide. In particular, the toothed belt is tensioned between the two tensioning devices which are respectively arranged at the ends on the circular arc guide. The further clamping device has, for example, the features already described above and in particular comprises a mounted on a pivotable lever profile part, which holds the end-side portion of the toothed belt of the omega drive device positively.

In embodiments, the omega drive direction comprises a drive unit with two deflection rollers and a drive wheel arranged between the two deflection rollers and driven by a motor. The toothed belt is guided over circumferential portions of the pulleys and the drive wheel. In the area of the drive unit, the toothed belt is thus guided along a trajectory whose shape substantially corresponds to the Greek letter omega. The drive unit forms an assembly that can be moved along the toothed belt. Accordingly, the position of permanently connected to the drive unit components along the particular guided along the circular arc guide belt can be adjusted. The drive unit comprises a drive motor, in particular an electric motor, for driving the drive wheel.

The deflection rollers may for example be movably mounted and in particular resiliently biased in order to keep the toothed belt under tension.

In preferred embodiments, the tension of the toothed belt is significantly over at least one of the above-described tensioning devices. In such embodiments, the deflection rollers on axes of rotation, which are mounted fixed with respect to the toothed belt. In this context, stationary means that in particular no movement of the deflection rollers in a direction perpendicular to the longitudinal extent of the toothed belt, ie in particular away from the toothed belt or towards the toothed belt, is made possible. It is understood that the deflection rollers are rotatable about their axes of rotation and the deflection rollers are movable as part of the drive unit along the toothed belt.

An imaging medical device, in particular C-arm X-ray device, has at least one of the omega drive devices described above.

In embodiments, the at least one omega drive device is designed to adjust at least one imaging component of the imaging medical device over at least one angular range about an orbital rotation axis extending through an examination region. An orbital axis of rotation in a broader sense may be any axis of rotation about which the imaging component is movably guided. An orbital axis of rotation in the narrower sense is in particular the orbital axis of rotation of a C-arm X-ray device with at least one C-arm which extends over a circumferential section around the orbital axis of rotation.

An imaging component in the sense of this second-hand sample is, in particular, an X-ray emitter (also: X-ray emitter, X-ray tube), optionally with an aperture unit, or an X-ray detector, in particular a flat-panel detector.

In embodiments, the imaging medical device comprises at least one X-ray emitter and at least one X-ray detector, which are each arranged opposite an examination area. Such embodiments are in particular designed to provide fluoroscopic images or projection images that provide information about the morphological structure of the examined body region. The transillumination images or projection images (also: projections) serve in embodiments in the context of a tomographic method as the basis for the reconstruction of three-dimensional image data from which, for example, tomographic images can be extracted.

In embodiments, the circular arc guide of the at least one omega drive device extends along a C-arm of the imaging medical device, in particular along an inner C-arm or an outer C-arm of the imaging medical device. In embodiments, the inner and outer C-arms extend in particular over circular arc sections, which are arranged concentrically around the orbital axis of rotation. The imaging components are in particular each end attached to the inner C-arm. In other embodiments, only a C-arm is provided to which the imaging components are attached at each end. On the C-arm, in particular on the inner or outer C-arm, clamping devices are provided in embodiments each end, by means of which the position of the omega drive device, in particular with respect to their center position on the C-arm or with respect to their center position on the inner and / or outer C-arm can be adjusted exactly.

In embodiments, the at least one omega drive device is designed to provide the at least one imaging component along the to adjust the outer C-arm. A further omega drive device, in particular a further omega drive device with the features already described, is designed to adjust the at least one imaging component along the inner C-arm. In other words, two omega drive devices are provided, which serve for adjusting the at least one imaging component about the orbital rotation axis. The circular arc guide of the at least one omega drive device extends in particular at least in sections over the outer C-arm. Accordingly, the circular arc guide of the further omega drive device extends in particular at least in sections over the inner C-arm.

In embodiments, the inner C-arm is connected via an intermediate carriage with the outer C-arm or the inner C-arm is movably mounted on the intermediate carriage on the outer C-arm. The intermediate carriage is in each case at least partially movable along the inner C-arm and the outer C-arm. The inner C-arm is movably guided in particular relative to the outer C-arm. The intermediate carriage can be moved in particular with the aid of the at least one omega drive device along the outer C-arm. The inner C-arm can be moved in particular relative to the intermediate carriage with the aid of the further omega drive device.

In embodiments, the C-arm, in particular the inner C-arm, on a tripod, in particular on a ceiling mount or on a ground stand, rotatably mounted about a Angulardrehachse. The Angularachse runs in particular perpendicular to the orbital axis of rotation and intersects this within the examination area. The tripod can also be designed to be mobile, in particular in embodiments, and for this purpose can be mounted on a chassis.

An imaging system includes an imaging medical device having the features described above. The imaging medical device described above is, for example, part of an imaging system, in particular medical imaging, or integrated in an imaging system. The imaging system is designed, for example, for detecting the morphological structure of the interior of a patient's body. The imaging system comprises, for example, at least one display unit for displaying acquired and / or digitally reconstructed X-ray images, a patient couch (also: patient table) for supporting a patient and a system control, in particular for controlling at least one imaging modality or at least one of the imaging medical facilities described above. In embodiments, the display unit of the imaging system comprises at least one display or a monitor, in particular for displaying image data of the acquired examination area. The representation of the image data relates, for example, to the representation of projection images or the representation of slice images from three-dimensionally reconstructed, in particular tomographically reconstructed, image data sets. In embodiments, the imaging system has at least one evaluation unit or at least one processor which is designed to execute at least one program or at least one software, in particular for image evaluation, or at least one control routine. The image analysis comprises in embodiments in particular the determination of three-dimensional image data sets from previously acquired projection images of the patient, in particular based on a tomographic reconstruction, and / or the extraction of slices from three-dimensionally reconstructed image data sets. In image refinements, the image analysis preferably comprises at least one human-machine location or a user interface for capturing user input. The man-machine interface includes, for example, in possible embodiments, a plurality of user-activatable switching elements or buttons or a display with touch-sensitive surface (touch screen).

• 1: eine Bildgebungsanlage mit einer bildgebenden medizinischen Einrichtung in einer schematischen Seitenansicht;
• 2: eine Spanneinrichtung für eine Omega-Antriebseinrichtung, die dazu ausgebildet ist, die Bildgebungskomponenten der in 1 dargestellten bildgebenden medizinischen Einrichtung über zumindest einen Winkelbereich um eine Orbitaldrehachse zu verstellen, in einer Schnittdarstellung;
• 3: die Spanneinrichtung der 2 in einer Seitenansicht.

For a further description of the invention reference is made to the embodiments shown in the drawing figures. They show in a schematic representation:

• 1 : an imaging system with an imaging medical device in a schematic side view;
• 2 A jig for an omega drive device adapted to receive the imaging components of the in 1 shown imaging medical device over at least an angular range to adjust an orbital axis of rotation, in a sectional view;
• 3 : the clamping device of the 2 in a side view.

Corresponding parts are provided in all figures with the same reference numerals.

1 shows an imaging system 100 with an imaging medical facility 110 , a display unit 120 and a patient bed 130 in a schematic side view.

The medical imaging facility 110 is in exemplary illustrated embodiment as a C-arm X-ray device with a inner C-arm 111 and an outer C-arm 112 educated. At the inner C-arm 111 are each end imaging components 113 attached. The imaging components 113 include an X-ray source 114 with aperture unit, and an x-ray detector 115 , the X-ray source 114 is arranged opposite. In one between the X-ray source 114 and the X-ray detector 115 lying examination area U can be a body part of a patient to be examined in particular with the help of the patient bed 130 be introduced. The imaging components 113 can be arranged in different positions around the examination area U. These are the inner and outer C-arm 111 . 112 around an orbital axis of rotation D1 and an angular axis of rotation D2 rotatably mounted. The orbital axis of rotation D1 and the Angular axis of rotation D2 are perpendicular to each other and intersect at the center of the examination area U.

The inner C-arm 111 is via a moving intermediate car 116 attached to the outer C-arm. The intermediate car 116 is along a circular arc guide 12 at the radially inner side of the outer C-arm 112 is formed, adjustable guided. The inner C-arm is corresponding 111 relative to the intermediate car 116 along another circular arc guide 11 along the radially outer side of the inner C-arm 111 runs, adjustable. By adjusting the intermediate car 116 along the circular arch guide 12 or by adjusting the inner C-arm 111 along the further circular arc guide 11 can use the imaging components 113 be moved around the orbital axis of rotation.

The intermediate car 116 is along the circular arc guide 12 by means of an omega drive device 10 its location within the outer C-arm 112 is shown, movable. It is understood that for motorized adjustment of the inner C-arm 111 along the circular arch guide 11 another, correspondingly designed analog omega drive device is provided.

The omega drive device 10 includes a timing belt 13 that goes along the circular arc guide 12 is curious, two pulleys 14 and a powered drive wheel 15 with drive motor 16 , in particular electric motor. The timing belt 13 is at its ends on the outer C-arm 12 attached and over the pulleys 14 and the drive wheel 15 guided. The drive motor 16 , the pulleys 14 and the drive wheel 16 form a drive unit 17 along the circular arch guide 12 is adjustable by motor. The intermediate car 116 is with the drive unit 17 firmly connected, so that this with the drive unit 17 moved.

The outer C-arm 112 is on a ceiling tripod 117 the imaging medical facility 110 around the angular axis of rotation D2 rotatably mounted. The ceiling tripod 117 is also typically about a vertical axis V rotatably mounted and along guide rails 118 in a horizontal direction H slidably guided. The display unit 120 is also a ceiling-supported, articulated arm 121 on the guide rails 118 in a horizontal direction H slidably mounted. The patient bed 130 has a couch part 131 (also: horizontal module), which is mounted on a height-adjustable pedestal 132 rests. The couch part 131 is also in embodiments in the horizontal direction H movably mounted to allow flexible positioning of the body of the patient to be examined in the examination area U to enable.

The medical imaging facility 110 the imaging system 100 is designed to record projection images of the body region of the patient to be examined from different directions of view. The recorded projection recordings can be based, for example, on a digital, in particular tomographic, reconstruction of the examined body region. The imaging system 100 has for this purpose, for example, an evaluation unit, not shown, which is designed to reconstruct three-dimensional image data from the acquired projections. In addition, a software or a program routine is implemented in the evaluation unit, with the aid of which two-dimensional sectional images can be extracted by the reconstruction volume of the three-dimensional image data. The display unit 120 has a screen 121 on, which serves in particular to represent the projection photographs and / or the sectional images.

The timing belt 13 the omega drive device 10 is by means of clamping devices 1 curious, each end to the circular arc guide 12 are arranged. Details of the clamping device 1 are in 2 shown.

1 shows an example of the clamping device 1 at one end of the outer C-arm 112 is arranged. The clamping device 1 includes one about an axis of rotation D pivotally mounted lever 2 on which a profile part 3 is fastened by means of a screw connection. Between the profile part 3 and the lever 2 is an end-side section of the toothed belt 13 pinched. The timing belt 13 has a variety of bars 18 on, perpendicular to the longitudinal extent of the belt 13 extend. The profile part 3 has a toothed belt 13 complementary shape. The profile part 3 in particular has a plurality of grooves 4 in which the bars 18 of the toothed belt 13 are held positively. The attachment of the end portion of the toothed belt 13 on the clamping device is done by form and adhesion, by several screws 5 is taught.

Clamping the at the clamping device 1 attached toothed belt 13 done by moving the lever 2 at an angle of at least 70 °, preferably about 90 ° or more, about the axis of rotation D , The timing belt 13 is over a rounded area 6 guided to avoid damage.

The lever 2 is lockable in the deflected position to the timing belt 13 always under tension. To lock is, as in particular in 3 shown, the rear side provided a further screw, the at least one further screw 7 which covers the folded lever 2 relative to the outer C-arm 112 fixed.

Although the invention has been illustrated and described in detail with reference to the preferred embodiments, the invention is not limited thereby. Other variations and combinations may be deduced therefrom by those skilled in the art without departing from the essential spirit of the invention.

Claims (19)

Clamping device (1) for a toothed belt (13) of an omega drive device (10), having a profile part (3) which has a shape complementary to at least one end section of the toothed belt (13), so that the end section of the toothed belt (13 ) is positively fastened to the profile part (3), wherein the profile part (3) on a lever (2) is fastened or fastened, which is pivotally mounted about a rotation axis (D). Clamping device (1) to Claim 1 , characterized in that the lever (2) is adapted to tension the toothed belt (13) by folding around the axis of rotation (D) by an angle of 70 ° to 110 °, preferably by an angle of approximately 90 °. Clamping device (1) to Claim 2 , characterized in that the folded lever (2), in particular by means of a locking means, in particular by means of a screw connection, can be locked. Clamping device (1) to Claim 2 or 3 , characterized in that the lever (2) has a rounded portion (6), wherein the tensioned toothed belt (13) is guided over the rounded portion (6). Clamping device (1) according to one of the preceding claims, characterized in that the profile part (3) has a plurality of mutually parallel grooves (4) for receiving complementarily formed webs (18) of the toothed belt (13). Clamping device (1) according to one of the preceding claims, characterized in that the profile part (3) on the lever (2) is non-positively fastened. Clamping device (1) to Claim 6 , characterized in that the profile part (3) on the lever (2) can be fastened by means of a screw connection. Omega drive device (10), in particular for an imaging medical device (110), with at least one tensioning device (1) according to one of the preceding claims. Omega drive device (10) after Claim 8 , characterized in that the at least one clamping device (1) on a circular arc guide (11, 12) is arranged end, wherein the toothed belt (13) along the circular arc guide (11, 12) is guided and the at least one clamping device (1) formed thereto is to exert a tension on the along the circular arc guide (11, 12) guided toothed belt (13). Omega drive device (10) after Claim 9 , characterized in that a further tensioning device (1), in particular according to one of Claims 1 to 7 , on the circular arc guide (11, 12) end and the at least one clamping device (1) is arranged opposite, wherein the further clamping device (1) is adapted to a tension on the along the circular arc guide (11, 12) guided toothed belt (13) exercise. Omega drive device (10) after one of Claims 8 to 10 , characterized in that a drive unit (17) comprises two deflection rollers (14) and a drive wheel (15) arranged between the two deflection rollers (14) and driven by a drive motor (16), wherein the toothed belt (13) has circumferential sections Deflection rollers (14) and the drive wheel (15) is guided. Omega drive device (10) after Claim 11 , characterized in that the deflection rollers (14) have axes of rotation which are fixedly mounted with respect to a motor-driven axis of rotation of the drive wheel (15). Medical imaging device (110), in particular C-arm X-ray device, with at least one omega drive device (10) according to one of Claims 8 to 12 , Imaging Medical Device (110) after Claim 13 , characterized in that the at least one omega drive device (10) is designed to adjust at least one imaging component (113) over at least one angular range about an orbital rotation axis (D1) passing through an examination region (U). Imaging Medical Device (110) after Claim 13 or 14 , characterized in that the circular arc guide (11, 12) of the at least one omega drive device (10) along a C-arm (111, 112), in particular along an inner C-arm (111) or along an outer C-arm ( 112), runs. Imaging Medical Device (110) after Claim 15 , characterized in that the at least one omega drive device (10) is adapted to adjust the at least one imaging component (113) along the outer C-arm (112) and a further omega drive device (10), in particular according to one of Claims 8 to 12 , is adapted to adjust the at least one imaging component (113) along the inner C-arm (111). Imaging Medical Device (110) after Claim 15 or 16 , characterized in that the inner C-arm (111) via an intermediate carriage (116) with the outer C-arm (112) is connected, wherein the intermediate carriage (116) at least partially along the inner C-arm (111) and C-arm (112) is movable. Medical imaging institution (110) after one of Claims 15 to 17 , characterized in that the C-arm (111, 112), in particular the inner C-arm (111) on a tripod (117), in particular ceiling stand (117) or floor stand, is rotatably mounted about an angular pivot axis (D2). An imaging system (110) with an imaging medical device (100) according to one of Claims 15 to 18 ,

Images