CN210722489U

CN210722489U - Filter driving and adjusting device of CT collimator

Info

Publication number: CN210722489U
Application number: CN201921341153.7U
Authority: CN
Inventors: 王林; 方伟峰; 马兴江
Original assignee: FMI Technologies Inc
Current assignee: Minfound Medical Systems Co Ltd; FMI Technologies Inc
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-06-09
Anticipated expiration: 2029-08-19

Abstract

The utility model provides a filter driving and adjusting device of a CT collimator, which relates to the technical field of medical equipment, wherein the driving device is arranged at one end of a filter and comprises a motor, a screw rod, a first spiral bevel gear, a second spiral bevel gear and a first support, wherein the screw rod is respectively fixed with a front end bearing seat and a rear end bearing seat at two ends; the filter is movably arranged on a guide mechanism of the CT collimator; the adjusting device comprises a first long hole and a second long hole which are respectively arranged at two ends of the filter; one end of the filter is provided with a displacement adjusting component. Adopt the utility model discloses a drive arrangement can save installation space, and adjusting device can realize the accurate regulation of filter.

Description

Filter driving and adjusting device of CT collimator

Technical Field

The utility model relates to a filter drive and adjusting device of CT collimator belongs to medical equipment technical field.

Background

In the prior art, a Filter (Filter) of a CT collimator is connected with a guide mechanism in a bolt fixing mode, and the motion of the Filter is realized by adopting a motor, a coupler and a lead screw for transmission, but the following problems exist:

1. the motor is connected with the lead screw through the coupler, so that the Z-direction space occupied by the whole filter and the driving mechanism is large, and the cost is high;

2. the filter adopts a screw fixing mode without other auxiliary adjusting mechanisms, so that the difficulty in adjusting the filter is high;

3. the filter is directly connected with the guide mechanism, so that the filter is inconvenient to disassemble/replace;

4. the existing collimator realizes full shielding of X-rays through an Aperture (shutter), which increases the size of the Aperture and thus increases the cost.

The present application was made based on this.

SUMMERY OF THE UTILITY MODEL

In order to solve the above defects existing in the prior art, the utility model provides a filter drive and adjusting device of CT collimator to save installation space, and realize the accurate regulation of filter

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a filter driving and adjusting device of a CT collimator is arranged at one end of a filter and comprises a motor, a screw rod, a first spiral bevel gear, a second spiral bevel gear and a first support, wherein a front end bearing seat and a rear end bearing seat are respectively fixed at two ends of the screw rod, the first spiral bevel gear is arranged on an output shaft of the motor, the second spiral bevel gear is meshed with the first spiral bevel gear and fixedly sleeved on the screw rod, and the first support is sleeved on the screw rod and is in threaded fit with the screw rod; one end of the filter is fixed on the first support; a second support is fixed below the other end of the filter, and the filter is movably mounted on a guide mechanism of the CT collimator through the first support and the second support;

the adjusting device comprises a first long hole and a second long hole which are respectively arranged at two ends of the filter, and the two ends of the filter are respectively fixed with the first support and the second support through the first long hole, the second long hole and a tightness adjusting assembly arranged in the first long hole and the second long hole; one end of the filter is provided with a displacement adjusting component.

Preferably, the tightness adjusting assembly is realized by a bolt and a nut.

Preferably, the displacement adjusting assembly comprises a fixed block and an adjusting screw which penetrates through the fixed block and is in threaded fit with the fixed block; one end of the adjusting screw is in threaded fit with the filter.

Preferably, the adjusting screw is further sleeved with a spring.

Preferably, the bases are fixedly arranged below the first support and the second support, and the filter is movably arranged on the guide mechanism through the bases.

Preferably, the guide mechanism comprises a guide rail arranged below two ends of the filter and a sliding block arranged on the guide rail in a sliding manner, and the base is detachably fixed on the sliding block.

Preferably, the outside of displacement adjustment subassembly is enclosed there is the separation blade, the both ends of separation blade are fixed with fixed block and support through adjustable set screw, and adjusting screw's regulation end is contradicted with the separation blade.

Preferably, a tungsten gold sheet is arranged between the two bases.

The utility model discloses a theory of operation: the utility model discloses motor among the drive arrangement drives first spiral bevel gear and rotates to drive the rotation of second spiral bevel gear with it meshing, make the lead screw rotate, linear motion is realized to first support, and first support drives the base of fixing on it and carries out linear displacement, because on the base is fixed in below guiding mechanism's slider, the slider is installed on the guide rail, therefore drive arrangement drives whole filter directional motion on the guide rail.

The utility model discloses adjusting device's accommodation process: loosen 2 bolt and nut of installing on the slot hole, through rotatory adjusting screw, can realize the filter round trip movement, the filter can move in the slot hole, and the distance of removing simultaneously is: one rotation of the set screw = one pitch of the filter movement set screw.

The utility model discloses can realize following technological effect:

(1) the utility model discloses with adopting bevel gear (spiral bevel gear) to come the transmission between motor and the lead screw, place the motor that drives the filter in the outside, make filter + actuating mechanism Z less to occupation space, the mounted position is more free.

(2) The utility model discloses a filter can be adjusted fast accurately to spring + adjusting screw.

(3) The utility model discloses a mode of bolt fastening fixes the filter on the base, and the base is connected with guiding mechanism. Therefore, the filter is convenient to replace/disassemble, and the guide mechanism is not required to be disassembled.

(4) The utility model discloses be provided with the tungsten gold piece on the filter base, through removing the filter, realize that X ray shelters from entirely. Because the full shielding position is arranged closer to the focus of the bulb tube, the tungsten gold sheet can be arranged in a smaller overall dimension, and the cost can be further reduced.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a filter driving and adjusting device of a CT collimator according to the present embodiment;

FIG. 2 is a schematic view of the adjusting device and the filter assembly of the present embodiment;

FIG. 3 is a cross-sectional view of the displacement adjustment assembly of the present embodiment;

fig. 4 is a schematic structural diagram of a bottom view of the adjusting device and the filter according to the present embodiment.

Description of the labeling: the device comprises a filter 1, a base 11, a motor 21, a front end bearing seat 22, a rear end bearing seat 23, a lead screw 24, a first spiral bevel gear 25, a second spiral bevel gear 26, a first support 27, a second support 28, a first long hole 31, a second long hole 32, a bolt nut 33, an adjusting screw 34, a fixed block 35, a limit baffle plate 41, a limit switch 42, a baffle plate 51, an adjustable fixed screw 52, a sliding block 61, a guide rail 62 and a tungsten sheet 7.

Detailed Description

In order to make the technical means and the technical effects achieved by the technical means of the present invention clearer and more complete, the following embodiments are provided and are described in detail with reference to the accompanying drawings as follows:

as shown in fig. 1 to 4, in the driving and adjusting device of the filter 1 of the CT collimator of the present embodiment, the driving device is disposed at one end of the filter 1, and includes a motor 21, a screw rod having two ends respectively fixed with a front bearing seat 22 and a rear bearing seat 23, a first spiral bevel gear 25 mounted on an output shaft of the motor 21, a second spiral bevel gear 26 engaged with the first spiral bevel gear 25 and fixedly sleeved on the screw rod, and a first support 27 sleeved on the screw rod and in threaded fit with the screw rod; one end of the filter 1 is fixed on the first support 27; a second support 28 is fixed below the other end of the filter 1, and the filter 1 is movably mounted on a guide mechanism of the CT collimator through a first support 27 and the second support 28;

the adjusting device comprises a first long hole 31 and a second long hole 32 which are respectively arranged at two ends of the filter 1, and two ends of the filter 1 are respectively fixed with the first support 27 and the second support 28 through the first long hole 31, the second long hole 32 and a tightness adjusting component arranged in the first long hole 31 and the second long hole 32; one end of the filter 1 is provided with a displacement adjusting assembly.

The motor 21 in the driving device of this embodiment drives the first spiral bevel gear 25 to rotate and drives the second spiral bevel gear 26 engaged therewith to rotate, so that the screw 24 rotates, the first support 27 performs linear motion, the first support 27 drives the base 11 fixed thereon to perform linear displacement, and since the base 11 is fixed on the slide block 61 of the lower guide mechanism, the slide block 61 is mounted on the guide rail 62, so that the driving device drives the whole filter 1 to perform directional motion on the guide rail 62.

The adjusting process of the adjusting device of the embodiment is as follows: 2 bolt nuts installed on the long holes are loosened, the filter 1 can move back and forth by rotating the adjusting screw 34, the filter 1 can move in the long holes, and the moving distance is as follows: one rotation of the adjusting screw 34 = one pitch of the adjusting screw 34 moved by the filter 1.

Preferably, the slack adjuster assembly is implemented by a bolt and a nut.

Preferably, the displacement adjusting assembly includes a fixing block 35, and an adjusting screw 34 penetrating the fixing block 35 and threadedly engaged with the fixing block 35; one end of the adjusting screw 34 is screw-fitted to the filter 1. The filter 1 is moved left and right by rotating the adjusting screw 34.

In the preferred embodiment, the adjusting screw 34 is further sleeved with a spring to ensure that the adjusting screw 3434 does not move

In the preferred embodiment, the base 11 is fixedly installed below the first support 27 and the second support 28, and the filter 1 is movably installed on the guide mechanism through the base 11. The base 11 can be used to hold the support, to hold the filter 1 and to mount the entire filter 1 on

Preferably, the guiding mechanism includes a guide rail 62 installed below both ends of the filter 1, and a slider 61 slidably installed on the guide rail 62, and the base 11 is detachably fixed on the slider 61. The filter 1 is fixed on the base 11 by a bolt fixing mode, and the base 11 is connected with the guide mechanism. The filter 1 is convenient to replace/disassemble without disassembling a guide mechanism.

In the preferred embodiment, the displacement adjusting assembly is externally surrounded by a baffle 51, two ends of the baffle 51 are fixed with the fixing block 35 and the support through adjustable fixing screws 52, and the adjusting end of the adjusting screw 34 abuts against the baffle 51. The stop plate 51 and the adjustable set screw 52 are used to position the set screw 34 to prevent it from loosening during operation.

In the preferred embodiment, the tungsten foil 7 is installed between the two bases 11. By moving the filter 1, full X-ray shielding is achieved.

The above is a detailed description of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be assumed that the embodiments of the present invention are limited to the above description, and it will be apparent to those skilled in the art that the present invention can be implemented in a variety of ways without departing from the spirit and scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. A filter driving and adjusting device of a CT collimator is characterized in that: the filter driving device of the CT collimator is arranged at one end of the filter and comprises a motor, a screw rod, a first spiral bevel gear, a second spiral bevel gear and a first support, wherein the front end bearing block and the rear end bearing block are respectively fixed at two ends of the screw rod, the first spiral bevel gear is arranged on an output shaft of the motor, the second spiral bevel gear is meshed with the first spiral bevel gear and fixedly sleeved on the screw rod, and the first support is sleeved on the screw rod and is in threaded fit with the screw rod; one end of the filter is fixed on the first support; a second support is fixed below the other end of the filter, and the filter is movably mounted on a guide mechanism of the CT collimator through the first support and the second support;

2. A filter driving and adjusting apparatus of a CT collimator as claimed in claim 1, wherein: the tightness adjusting assembly is realized through bolts and nuts.

3. A filter driving and adjusting apparatus of a CT collimator as claimed in claim 1, wherein: the displacement adjusting assembly comprises a fixed block and an adjusting screw which penetrates through the fixed block and is in threaded fit with the fixed block; one end of the adjusting screw is in threaded fit with the filter.

4. A filter driving and adjusting apparatus of a CT collimator as claimed in claim 3, wherein: and the adjusting screw is also sleeved with a spring.

5. A filter driving and adjusting apparatus of a CT collimator as claimed in claim 1, wherein: the filter is characterized in that bases are fixedly arranged below the first support and the second support, and the filter is movably arranged on the guide mechanism through the bases.

6. The filter driving and adjusting apparatus of a CT collimator as claimed in claim 5, wherein: the guide mechanism comprises a guide rail arranged below two ends of the filter and a sliding block arranged on the guide rail in a sliding manner, and the base is detachably fixed on the sliding block.

7. A filter driving and adjusting apparatus of a CT collimator as claimed in claim 3, wherein: the outside of displacement adjustment subassembly is enclosed there is the separation blade, the both ends of separation blade are fixed with fixed block and support through adjustable set screw, and adjusting screw's regulation end is contradicted with the separation blade.

8. The filter driving and adjusting apparatus of a CT collimator as claimed in claim 5, wherein: and a tungsten gold sheet is arranged between the two bases.