CN218105908U

CN218105908U - X-ray apparatus

Info

Publication number: CN218105908U
Application number: CN202123213626.5U
Authority: CN
Inventors: Z.帕维尔
Original assignee: Siemens Healthineers AG
Current assignee: Siemens Healthineers AG
Priority date: 2020-12-22
Filing date: 2021-12-20
Publication date: 2022-12-23
Anticipated expiration: 2031-12-20
Also published as: DE202020107462U1

Abstract

The invention relates to an X-ray device having a C-arm which is adjustable in an orbital movement along its circumference, wherein the contour of the C-arm has a slide rail with two inner edges on at least one side, wherein the C-arm is held by a carriage, and at least two guide rollers are arranged on the carriage, at least one first of these guide rollers can roll along a first inner edge, and at least one second of these guide rollers can roll along a second inner edge of the same slide rail of the C-arm, whereby the orbital movement of the C-arm can be effected, and wherein the first and the second guide rollers are connected by means of a roller holding element.

Description

X-ray apparatus

Technical Field

The utility model relates to an especially portable X ray equipment, this X ray equipment have according to the utility model discloses a along its circumference C shape arm adjustable in orbital motion.

Background

For high image quality of X-ray imaging, it is necessary, in particular, for the C-arm of the mobile X-ray apparatus to be arranged in a particularly precise, stable and continuously adjustable manner. In order to make the C-arm track-slide around the center along its circumference, roller guides with guide rollers rolling in the slide rails of the C-arm are used in known systems, wherein the guide rollers are held by a carriage. The carriage is arranged on an equipment cart of the X-ray apparatus. Furthermore, the roller guide must support the large weight and the outwardly projecting dimension of the C-arm on which the at least one X-ray source and the X-ray detector are arranged. Since it is desirable that the C-arm can be adjusted several times, the guide rollers must stabilize the weight in all directions.

Roller guide arrangements are known from the prior art, in which two guide rollers 12 with concentrically mounted bearing shafts 14 and two guide rollers 12 with eccentrically mounted bearing shafts 14 (for example by means of eccentric sleeves 15 with stop lugs 16) are used for both sides 9 of the C-arm 10, see fig. 1, 2 and 3. The mounting holes 22 in the carriage 11 for the concentrically mounted bearing shaft 14 must be produced very precisely, whereas the mounting holes 22 for the eccentrically mounted bearing shaft 14 can have play. By the eccentric mounting of every second guide roller 12, the guide rollers 12 can be brought without play into contact with the inner edge 13.1 of the running rail 13 of the C-arm 10; and 13.2, adapting.

To achieve that the guide rollers 12 follow the inner edge 13.1;13.2, a very precise mounting of the distance between the slide rail 13 and the position of the bearing shaft 14 of the guide roller 12 on the carriage 11 is required. The position of the C-arm 10 is related to the precision tolerance of the guide roller 12. The guide rollers 12 must be aligned both with the centre of the C-arm 10 and with the position of the respective bearing shafts 14 of the guide rollers 12 in order to ensure a precise guidance of the C-arm 10 around its centre. The tolerance must be greater due to the greater distance between the guide roller 12 and the center of the C-arm 10. The alignment process of the guide rollers 12 is time-consuming and cumbersome, especially since the aluminum C-arm rail cannot be manufactured with the accuracy originally required. Therefore, every second guide roller must be aligned by means of a large eccentric sleeve.

The alignment is performed as follows: after mounting the C-arm, the bearing shaft of the guide roller to be mounted eccentrically has to be rotated by using an eccentric sleeve until the guide roller reaches/contacts the corresponding edge of the slide rail. This must be done for all existing guide rollers that require an eccentric mounting. After all the guide rollers are aligned, a safety stopper is installed to prevent a position change.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide an especially mobile X-ray device with a C-arm which can be adjusted in the course of the orbital movement along its circumference, which ensures a particularly uniform and precise adjustment movement by simple mounting.

According to the utility model discloses, technical problem is through according to the utility model discloses a device solves. The advantageous embodiments of the invention are given in the description.

The invention relates to an X-ray device having a C-arm which is adjustable in an orbital movement along its circumference, wherein the contour (or profile) of the C-arm has a sliding rail with two inner edges on at least one side, wherein the C-arm is held (or held) by a carriage, and at least two guide rollers (or guide rollers) are arranged on the carriage, wherein at least one first of the guide rollers can roll along a first inner edge, and at least one second of the guide rollers can roll along a second inner edge of the same sliding rail of the C-arm, whereby the orbital movement of the C-arm can be effected, and wherein the first and the second guide rollers are connected by means of a roller holding element. In particular, the first and second guide rollers can be aligned together by rotation of the roller holding element about an axis passing through the center point between the two guide rollers in order to perform a play-free rolling movement on the inner edge of the running rail.

The two guide rollers are simultaneously aligned by means of the rotatable roller holding element, so that the guide rollers can be aligned and mounted very quickly. The alignment is achieved in that the two guide rollers each contact the inner edge (one each) of the running rail, so that they can roll on the inner edge. By aligning the two guide rollers together, the alignment of the holding elements by the rollers is also particularly precise. After calibration, the roller holding element is screwed down in order to fix the guide roller in its position. By means of the roller retaining element, errors in the production of the running rail or its inner edge can be compensated in a simple manner. The mounting holes in the carriage for the bearing shafts of the guide rollers can also be made with a large clearance, since the precise alignment is achieved by the roller retaining elements. Thereby reducing complexity in the component manufacturing process and manufacturing can be performed faster and cheaper. Less defective products are produced. It is only necessary to produce very precisely the mounting hole, through which the roller holding element is connected to the carriage, around which the roller holding element rotates, and which is located in particular at the center point of the connecting line between the two guide rollers. Overall, the X-ray device thus produced makes it possible to improve the image quality during X-ray imaging and thus to optimize the patient treatment.

According to the utility model discloses a design, the axis that passes the central point between two guide rollers is perpendicular to the connecting wire between these two guide rollers.

According to a further embodiment of the invention, four guide rollers are arranged on one side of the C-arm, wherein the first and second guide rollers and the third and fourth guide rollers are each connected by a roller holding element (or by a respective roller holding element). In this way a particularly stable sliding movement of the C-arm along the carriage is ensured.

According to a further embodiment of the invention, the C-arm has on each of its two sides a sliding rail with two inner edges, respectively, and at least two guide rollers are arranged on the carriage for each side, of which guide rollers at least one first guide roller, respectively, can roll along a first inner edge, and at least one second guide roller of the guide rollers can roll along a second inner edge of the corresponding sliding rail of the C-arm. Thereby, the C-arm is supported on both sides thereof, and both sides contribute to the sliding movement. This makes it possible to achieve a more precise sliding movement with simultaneous load balancing between the two sides.

According to a further embodiment, the X-ray system is formed by a mobile (or mobile) X-ray system, and the carriage is held on a system vehicle. By means of the invention, a mobile X-ray apparatus can be made particularly compact and can be installed quickly and simply. A smaller weight and greater flexibility are great advantages in particular for mobile X-ray apparatus.

According to a further embodiment of the invention, the X-ray system is formed by a fixed installation of the X-ray system. Here, a smaller weight and a greater flexibility are also very useful, for example for ceiling-suspended systems.

Drawings

The invention and further advantageous embodiments are explained in detail below with the aid of exemplary embodiments shown in the drawing, but the invention is not limited to these exemplary embodiments. In the drawings:

fig. 1 shows a view of a known roller guide having two central guide rollers and two eccentric guide rollers along the running path of a C-arm;

fig. 2 shows a more detailed view of the guide roller according to fig. 1;

fig. 3 shows an exploded view of two guide rollers according to fig. 1 and 2;

fig. 4 shows a view of a roller guide according to the invention with four guide rollers along the running rail of the C-arm;

fig. 5 shows a more detailed view of the guide roller according to fig. 4;

fig. 6 shows an exploded view of two guide rollers according to fig. 4 and 5;

fig. 7 shows a cross-sectional view of the roller holding element, the carriage and the guide rollers; and

fig. 8 shows a mobile C-arm X-ray apparatus.

Detailed Description

Fig. 1 to 3 show a known roller guide, wherein two guide rollers 12 having a concentrically mounted bearing axle 14 and two guide rollers 12 having a bearing axle 14, which are mounted eccentrically, for example by means of an eccentric sleeve 15 (not visible in fig. 1 and 2) and a stop plate 16, are used for each side 9 of the C-arm 10. The mounting holes 22 in the carriage 11 for the concentrically mounted bearing shaft 14 must be produced very precisely, the mounting holes 22 for the eccentrically mounted bearing shaft 14 having play. By the eccentric mounting of every second guide roller 12, the guide rollers 12 can be brought without play into contact with the inner edge 13.1 of the running rail 13 of the C-arm 10; and 13.2, adapting. All guide rollers 12 must be mounted very precisely. In the exploded view in fig. 3, it is shown that the eccentric sleeve 15 must be fixed by means of a stop plate 16. The nut 17 is provided on both sides with a washer 19 and a bolt 18.

For a particularly smooth and precise rolling movement, a rotatable roller retaining element 20 is provided according to the invention, which interconnects every two guide rollers 12. The roller holding element 20 can rotate about a fixed center of rotation on the carriage 11. The roller guide according to the invention is shown in fig. 4 to 7, with the C-arm 10 and the carriage 11 in fig. 4, a more detailed view of the roller holding element 20 in fig. 5, an exploded view in fig. 6 and a cross section in fig. 7.

In fig. 4, the roller guide is arranged on one side 9 of the C-arm 10. The C-arm 10 has a sliding track 13 on this side 9, which has a first inner edge 13.1 and a second inner edge 13.2. Four guide rollers 12 are provided, two of which roll on the first inner edge 13.1 of the sliding rail 13 and two of which roll on the second inner edge 13.2 of the sliding rail 13, in order to bring about a rolling movement. These guide rollers are fixed to a carriage 11, which is in turn connected to the machine wagon 4 for supporting (or holding) the C-arm 10, see fig. 8. Each two guide rollers 12 are connected to each other by a roller holding element 20. A first guide roller 12 of the two guide rollers connected by the roller holding element 20 is arranged to be able to roll on the first inner edge 13.1 and a second guide roller 12 is arranged to be able to roll on the second inner edge 13.2.

During the installation of the X-ray device, the roller holding element 20 can be rotated about an axis a passing through a center point 21 between the two guide rollers 12, see arrow 23 in fig. 5. In this way, the two guide rollers 12 to which the roller holding element 20 is connected can be aligned (or oriented) together, in order to be as play-free as possible at the inner edge 13.1 of the running rail 13; and 13.2, rolling up. Here, the calibration process is as follows: the rotatable roller holding element 20 is rotated about the axis a at the center point 21 until the two guide rollers 12 hit the respective inner edges 13.1 of the running rails 13; 13.2; in this position, the bolt 18 in the mounting hole 22 at the center point 21 is tightened in order to prevent a change in position. Other bolts 18 and nuts 17 may also be secured. If recalibration is required, the bolts must be loosened again. In fig. 6 it can be seen that the mounting hole 22 through the center point 21 should be manufactured precisely, while the other mounting holes 22 for the bearing shaft 14 have play. In particular, the axis a passing through the center point 21 between the two guide rollers 12 is perpendicular to the connecting line between the two guide rollers 12.

The calibration is very fast. Furthermore, errors occurring during the production of the C-arm due to the distance between the inner edges of the sliding rails can be eliminated by the roller holding element according to the invention. Only a single point (central mounting hole at the center point 21) needs to be precisely made for each guide roller pair, which point is remote from the center point of the C-arm. The mounting is more accurate because fewer tolerance series are used. The X-ray device can be manufactured at a lower cost, since the complexity of the manufacture is reduced and there are fewer rejects in the manufacture. In summary, an improvement of the quality of the X-ray imaging can be achieved.

The roller guide arrangements shown in fig. 4 and 5 have, by way of example, two roller holding elements and four guide rollers 12, respectively, but it is also possible to use only one roller holding element 20 and two guide rollers 12, three roller holding elements 30 and six guide rollers or another even number of guide rollers. The roller guide according to the invention can be arranged on one side 9 of the C-arm or also on both sides of the C-arm.

The mobile X-ray apparatus 1 with the roller guide having the roller holding element 20 can be moved by means of an apparatus cart 4 with a plurality of rollers 5. The C-arm 10 carries the X-ray source 3 and the X-ray detector 2. By the utility model discloses, portable X ray equipment 1 can be made very compact and can install fast and simply. A smaller weight and greater flexibility are great advantages in particular for mobile X-ray apparatus.

It is also possible to provide fixedly mounted X-ray apparatus, for example ceiling-mounted or floor-mounted X-ray apparatus.

The utility model discloses can briefly gather through following mode: in order to achieve a particularly smooth and precise rolling movement of the C-arm, an X-ray device is provided which has a C-arm which is adjustable in an orbital movement along its circumference, wherein the contour of the C-arm has on at least one side a running rail with two inner edges, wherein the C-arm is held by a carriage and on which at least two guide rollers are arranged, at least one first of which can be rolled along a first inner edge and at least one second of which can be rolled along a second inner edge of the same running rail of the C-arm, whereby an orbital movement of the C-arm can be effected, and wherein the first and the second guide rollers are connected by means of a roller holding element and can be aligned together by means of a rotation of the roller holding element about an axis through a center point between the two guide rollers, in order to perform a play-free rolling movement on the inner edges of the running rail.

Claims

1. An X-ray apparatus (1) having a C-arm (10) which is adjustable in an orbital movement along its circumference, characterized in that the contour of the C-arm (10) has on at least one side (9) a slide rail (13) with two inner edges (13.1.13.2), wherein the C-arm (10) is held by a carriage (11), and on the carriage (11) at least two guide rollers (12) are arranged, of which at least one first guide roller (12) can roll along a first inner edge (13.1), and of which at least one second guide roller (12) can roll along a second inner edge (13.2) of the same slide rail (13) of the C-arm (10), whereby an orbital movement of the C-arm (10) can be effected, and wherein the first and the second guide rollers (12) are connected by means of a roller holding element (20).

2. The X-ray apparatus (1) according to claim 1, characterized in that the first and second guide rollers (12) can be aligned together by rotation of the roller holding element (20) about an axis (a) through a center point (21) between the two guide rollers (12) for a play-free rolling movement on the inner edge (13.1.

3. The X-ray apparatus (1) according to claim 2, characterized in that the axis (a) through the center point (21) between two guide rollers (12) is perpendicular to a connecting line between the two guide rollers (12).

4. The X-ray apparatus (1) according to one of claims 1 to 3, characterized in that four guide rollers (12) are arranged on one side, wherein the first and second guide rollers (12) and the third and fourth guide rollers (12) are each connected by a roller holding element (20).

5. The X-ray apparatus (1) according to one of claims 1 to 3, characterized in that the C-arm (10) has on each of its two sides (9) a slide rail (13) with two inner edges (13.1, 13.2), respectively, and on the carriage (11) at least two guide rollers (12) are arranged for each side (9), of which guide rollers at least one first guide roller (12) can roll along the first inner edge (13.1), respectively, and at least one second guide roller (12) of which guide rollers can roll along the second inner edge (13.2) of the respective slide rail (13) of the C-arm (10), respectively.

6. The X-ray apparatus (1) according to one of claims 1 to 3, characterized in that it is constituted by a mobile X-ray apparatus and wherein the carriage (11) is held on an apparatus cart (4).

7. An X-ray apparatus as claimed in any one of claims 1 to 3, characterized in that the X-ray apparatus is formed by a fixedly mounted X-ray apparatus.