CN211066675U

CN211066675U - A prevent wire winding mechanism for oral cavity CBCT

Info

Publication number: CN211066675U
Application number: CN201921210940.8U
Authority: CN
Inventors: 胡功银; 陈业慧; 蒋茂余; 路宇
Original assignee: Anhui Maikeshi Technology Co ltd
Current assignee: Anhui Maikeshi Technology Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-07-24
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses an anti-winding mechanism for oral CBCT, which comprises a cantilever, a rotating arm, a rotating component, a rotating arm offset component and an imaging device; the rotating assembly is arranged on the cantilever, the rotating arm offset assembly is arranged on the rotating assembly, the rotating assembly is connected with the rotating arm, and the imaging equipment is arranged on the rotating arm; the rotating arm offset assembly is provided with a connecting shaft, the connecting shaft is arranged on the rotating assembly, one end of the connecting shaft is fixed on the rotating arm, the cantilever and the rotating arm rotate around the axis of the connecting shaft, a rotating slip ring is arranged in the connecting shaft, and the rotating slip ring is connected with a circuit in the cantilever and the rotating arm; the utility model discloses a setting of rotatory sliding ring, rotor and stator can rotate relatively to guarantee when the connecting axle drives the swinging boom and rotates, the position of rotor keeps unchangeable, avoids under the rotation state, and the power supply line is preventing the inside winding deformation that takes place of wire winding mechanism, has certain wire winding effect.

Description

A prevent wire winding mechanism for oral cavity CBCT

Technical Field

The utility model relates to an oral cavity medical treatment technical field, concretely relates to prevent wire winding mechanism for oral cavity CBCT.

Background

The oral CBCT (Cone beam CT) technology is the most popular Cone beam CT applied in China at present, and the main working principle is as follows: the X-ray generator makes a circular DR (digital projection) around the projection at a low dose (typically, the bulb current is around 10 ma). Then, the data obtained in the intersection after digital projection for multiple times (180-360 times, different according to different products) around the projection body are 'recombined and reconstructed' in a computer, and then a three-dimensional image is obtained. Among them, the stability of the rotating mechanism in the oral CBCT apparatus is a key factor for high quality imaging.

At present, the rotation range of the oral CBCT rotation mechanism is limited by a mechanical limiting mechanism for preventing the part cable from being wound and damaged.

In view of the above-mentioned drawbacks, the authors of the present invention have finally obtained the present invention through long-term research and practice.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical defects, the technical solution adopted by the present invention is to provide an anti-wire winding mechanism for oral CBCT, comprising a cantilever, a rotating arm, a rotating assembly, a rotating arm offset assembly and an imaging device; the imaging device is arranged on the rotating arm, the cantilever and the rotating arm are driven to rotate relatively by the rotating assembly, and the cantilever and the rotating arm are driven to perform linear adjustment of relative positions by the rotating arm offset assembly; the rotating arm deviation assembly is provided with a connecting shaft, the connecting shaft is arranged on the rotating assembly, one end of the connecting shaft is fixed on the rotating arm, the cantilever and the rotating arm rotate around the axis of the connecting shaft, a rotating slip ring is arranged in the connecting shaft, and the rotating slip ring is connected with the cantilever and a circuit in the rotating arm.

Preferably, the rotating assembly comprises a driving motor, a driving chain wheel and an external tooth slewing bearing, the driving motor is fixedly arranged on the cantilever through a motor support, the driving chain wheel is arranged on an output shaft of the driving motor, the external tooth slewing bearing is fixed on the cantilever, and the driving chain wheel and the external tooth slewing bearing are in transmission connection through a chain.

Preferably, the rotating arm offset assembly comprises a brake assembly, a connecting assembly and a turntable, wherein the brake assembly and the connecting assembly are arranged on the turntable, and the turntable is fixedly arranged on an outer gear of the outer gear slewing bearing.

Preferably, the brake assembly comprises a motor, a screw nut and a screw, the motor and the screw are both arranged on the turntable, and the screw nut is in threaded connection with the screw; the connecting assembly comprises a linear guide rail and the connecting shaft, the connecting shaft is fixedly connected with a sliding block on the linear guide rail, the connecting shaft is fixedly connected with the screw nut,

preferably, the turntable is provided with a connecting hole, the cantilever is provided with a through hole, and the connecting shaft sequentially penetrates through the connecting hole and the through hole to be connected with the rotating arm.

Preferably, the connecting shaft is of a hollow structure, and the rotating slip ring is arranged in the connecting shaft.

Preferably, the rotating slip ring comprises a rotor, a stator and brushes, the stator and the rotor are respectively arranged at two ends of the connecting shaft, the rotor and the stator are connected through the brushes, and the rotor and the stator can rotate relatively; the stator and the rotor are respectively connected with a power supply cable of the imaging device in the rotating arm and an external power circuit arranged in the cantilever.

Preferably, the anti-winding mechanism for oral cavity CBCT further comprises a slide block link mechanism, and the slide block link mechanism is arranged in the cantilever; the sliding block connecting rod mechanism comprises a connecting rod, a first bearing, a second bearing, a moving block, a sliding rod and a sliding rod support, the end portion of the connecting rod is connected with the rotor on the rotating sliding ring through the first bearing, the other end portion of the connecting rod is connected with the moving block through the second bearing, the moving block is arranged on the sliding rod and can freely move on the sliding rod, and two ends of the sliding rod are fixed on the cantilever through the sliding rod support.

Preferably, the rotating assembly is provided with a tensioning wheel, the tensioning wheel is arranged between the driving sprocket and the slewing bearing, and the tensioning wheel is in contact connection with the chain.

Preferably, the anti-wire winding mechanism for oral cavity CBCT further comprises a zero reference assembly, wherein the zero reference assembly is a photoelectric switch arranged on the slewing bearing or an encoder arranged on the driving motor.

Compared with the prior art, the beneficial effects of the utility model reside in that: compared with the gear pair combination and the synchronous belt combination in the prior art, the rotary assembly adopted by the utility model has the advantages that the machining precision and the installation precision of the gear requirement are reduced, the complexity of the whole mechanism is reduced, the rotary arm offset assembly is matched, the multi-direction adjustment of the rotation, the translation and the like of the integrated X-ray source and the sensor can be realized, the installation strength is low, and the occupied volume is small; 2, through the setting of the rotary slip ring, the rotor and the stator can rotate relatively, so that the position of the rotor is kept unchanged when the connecting shaft drives the rotating arm to rotate, the power supply circuit is prevented from winding and deforming in the anti-winding mechanism in a rotating state, and a certain anti-winding effect is achieved.

Drawings

FIG. 1 is a structural view of the anti-wire winding mechanism for oral CBCT;

FIG. 2 is a structural view of the rotating assembly;

FIG. 3 is a structural view of the rotary arm offset assembly;

fig. 4 is a structural view of the slider linkage.

The figures in the drawings represent:

1-a cantilever; 2-a rotating arm; 3-a rotating assembly; 4-a rotary arm offset assembly; 5-an imaging device; 6-rotating slip ring; 7-a slider linkage; 31-a drive motor; 32-a motor support; 33-a sprocket; 34-external tooth slewing bearing; 35-a chain; 41-a motor; 42-lead screw nut; 43-lead screw; 44-linear guide rails; 45-rotating disc; 46-a connecting shaft; 71-a connecting rod; 72-self-aligning roller bearing; 73-deep groove ball bearing; 74-moving block; 75-a slide bar; 76-slide bar support.

Detailed Description

The above and further features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1, fig. 1 is a structural view of the anti-wire winding mechanism for oral CBCT; the utility model discloses an anti-winding mechanism for oral cavity CBCT comprises a cantilever 1, a rotating arm 2, a rotating component 3, a rotating arm offset component 4 and an imaging device 5; rotating assembly 3 sets up on the cantilever 1, swinging boom skew subassembly 4 sets up on the swinging boom 2, rotating assembly 3 with swinging boom skew subassembly 4 is connected, imaging device 5 all set up in on the swinging boom 2, through rotating assembly 3 can drive cantilever 1 with swinging boom 2 rotates relatively, through swinging boom skew subassembly 4 can drive cantilever 1 with the straight line that relative position was done to swinging boom 2 is adjusted, thereby finally the realization is right the regulation of 5 positions of imaging device.

As shown in fig. 2, fig. 2 is a structural view of the rotating assembly, the rotating assembly 3 includes a driving motor 31, a driving sprocket 33 and an external tooth slewing bearing 34, the driving motor 31 is fixedly disposed on the cantilever 1 through a bracket 32 of a motor 41, the driving sprocket 33 is disposed on an output shaft of the driving motor 31, the external tooth slewing bearing 34 is fixedly disposed on the cantilever 1, and the driving sprocket 33 and the external tooth slewing bearing 34 are in transmission connection through a chain 35, so that under a braking action of the driving motor 31, the driving sprocket 33 can drive an external gear of the external tooth slewing bearing 34 to rotate. The chain 35 is connected with the driving chain wheel 33 and the external tooth slewing bearing 34 in a gear tooth meshing manner. The axis of the external tooth slewing bearing 34 is the rotation center of the rotating assembly 3.

As shown in fig. 3, fig. 3 is a structural view of the rotary arm offset assembly; the swinging boom skew subassembly 4 includes brake assembly, coupling assembling and carousel 45, brake assembly with coupling assembling all sets up on the carousel 45, the carousel 45 is fixed to be set up on the outer gear of external tooth slewing bearing 34, so external tooth slewing bearing 34 can drive swinging boom skew subassembly 4 wholly rotates.

The brake assembly comprises a motor 41, a lead screw nut 42 and a lead screw 43, the motor 41 and the lead screw 43 are both arranged on the turntable 45, and the lead screw nut 42 is in threaded connection with the lead screw 43; coupling assembling includes linear guide 44 and connecting axle 46, connecting axle 46 with slider fixed connection on the linear guide 44, so connecting axle 46 can follow on the linear guide 44's extending direction slides, simultaneously, connecting axle 46 with screw nut 42 fixed connection, thereby realize screw nut 42 is in spacing effect on the lead screw 43 avoids screw nut 42 along screw 43 rotates and takes place to rotate promptly, connecting axle 46 can set up to hollow structure to reduce whole weight. The two linear guides 44 are generally disposed on the same side of the lead screw 43 and are disposed on two sides of the connecting shaft 46.

The turntable 45 is provided with a connecting hole, correspondingly, the cantilever 1 is provided with a through hole, and the connecting shaft 46 can sequentially penetrate through the connecting hole and the through hole to be connected with the rotating arm 2.

Preferably, the rotating arm biasing assembly 4 is installed above the rotating assembly 3. It is worth pointing out that the rotary arm bias assembly 4 may also be provided on the rotary arm, the connecting shaft 17 being connected to the rotary arm through the rotary arm bias assembly 4.

Through the structural arrangement of the rotating arm offset assembly 4, when the motor 41 drives the lead screw 43, since the lead screw nut 42 cannot rotate along with the lead screw 43, the lead screw nut 42 and the lead screw 43 rotate relatively, so that the position of the lead screw nut 42 on the lead screw 43 changes, the connecting shaft 46 is driven to slide on the linear guide rail 44, and the offset of the center of the rotating arm 2 relative to the rotation center of the rotating assembly 3 is realized.

The integrated X-ray source 5 and the connecting shaft 46 are respectively arranged on two end faces of the rotating arm 2, and the integrated X-ray source 5 and the sensor 6 are arranged on the same end face of the rotating arm 2.

The utility model discloses a rotating assembly, the gear pair combination, the hold-in range combination in prior art reduce the machining precision and the installation accuracy of gear, and whole mechanism complexity reduces, cooperates swinging boom skew subassembly can realize diversified regulations such as the rotation of integrated X radiation source and sensor, translation, and the installation intensity is low, and the installation is small.

Example two

The connecting shaft 46 is provided with a rotating slip ring 6, and the rotating slip ring 6 is arranged in the hollow connecting shaft 46 to realize the electric connection in the anti-winding mechanism. Specifically, the rotating slip ring 6 includes a rotor, a stator, and a brush, the stator is disposed at an end of the connecting shaft 46 close to the rotating arm, the rotor is disposed at an end of the connecting shaft 46 far from the rotating arm, and the rotor and the stator are connected by the brush; the stator is used for connecting a part cable, the part cable is generally a power supply cable of the imaging device 5, and the power supply cable is generally arranged in the rotating arm; the rotor is connected with an external power supply, generally, in order to protect a power supply circuit, a power supply cable of the external power supply is arranged from the inside of the cantilever, so that the external power supply is electrically connected with the power supply cable through the rotating slip ring 6, and the whole power supply circuit is ensured to be arranged inside the anti-winding mechanism.

The rotor and the stator can rotate relatively, so that the position of the rotor is kept unchanged when the connecting shaft 46 drives the rotating arm to rotate, the power supply circuit is prevented from winding and deforming inside the anti-winding mechanism in a rotating state, and a certain anti-winding effect is achieved.

It is worth pointing out that the stator of the rotary slip ring 6 and the rotor can be exchanged in position, and correspondingly the rotary slip ring 6 can be installed inversely, that is, the rotor is at the lower end, and the stator is at the upper end, so that the functions of the present invention can be realized.

EXAMPLE III

The anti-winding mechanism for the oral cavity CBCT further comprises a slider link mechanism 7, as shown in FIG. 4, FIG. 4 is a structural view of the slider link mechanism; the slider linkage 7 is disposed within the suspension; the slider link mechanism 7 comprises a connecting rod 71, a self-aligning roller bearing 72, a deep groove ball bearing 73, a moving block 74, a sliding rod 75 and a sliding rod support 76, wherein the end of the connecting rod 71 is connected with the rotor on the rotary sliding ring 6 through the self-aligning roller bearing 72, the other end of the connecting rod is connected with the moving block 74 through the deep groove ball bearing 73, the moving block 74 is arranged on the sliding rod 75, the moving block 74 can freely move on the sliding rod 75, and two ends of the sliding rod 75 are fixed on the cantilever through the sliding rod support 76.

Since the rotor is connected to the stator only via the brush, the position of the rotor in the suspension arm can be stabilized by the slider link mechanism 7, thereby further improving the anti-winding effect.

The slider link mechanism 7 can realize linear movement driven by the rotating arm offset assembly while ensuring the position stability of the rotor, thereby realizing a better wire winding prevention function.

The slider connecting rod 71 is structurally installed on the cantilever 1, one end of the slider connecting rod is provided with a self-aligning roller bearing 72 which is connected with the center of the end part of the rotor of the rotary sliding ring 6, and the other end of the slider connecting rod is provided with a deep groove ball bearing 73 which is connected with the slider in the slider connecting rod mechanism 7, so that the unequal heights of the end part of the rotor of the rotary sliding ring 6 and the slider connecting rod 71 are avoided.

Through the structure setting of rotatory sliding ring 6, when carrying out oral cavity panorama shooting mode, the circular motion can be done along with the rotatory center of rotation of rotating system in rotatory sliding ring 6 center, and then drives rotatory sliding ring 6 rotor cable and do the circular motion, and slider link mechanism 7 can make the rotor cable avoid damaging because of the winding of many circles of rotations.

Example four

In the present embodiment, the transmission structure of the driving sprocket 33 and the external tooth slewing bearing 34 in the rotating assembly can adopt a combination of a driving gear, a synchronous belt and the external tooth slewing bearing 34 which are conventional in the prior art; the driving gear and the internal tooth slewing bearing; pin gear drive components and the like can realize similar drive structures with drive functions.

In this embodiment, the linear guide 44 of the rotary arm offset assembly of the present invention can also be respectively disposed on the two sides of the lead screw 43, and the guiding function of the linear guide 44 can also be realized.

Preferably, a photoelectric switch is arranged corresponding to the external tooth slewing bearing 34, or an encoder is added on the driving motor 31, so that the reference 0 point positioning function of the novel CBCT mechanism can be realized.

Preferably, the rotating assembly is provided with a tensioning structure, specifically, a tensioning wheel may be provided, the tensioning wheel is disposed between the driving sprocket 33 and the external tooth slewing bearing 34, and the tensioning wheel is in contact connection with the chain 35, so as to achieve a tensioning effect on the chain 35.

Specifically, a rotating shaft is arranged at the axis of the tension wheel, the rotating shaft is arranged on the cantilever 1 through an adjusting part, and the tension wheel can rotate freely around the rotating shaft. The adjusting portion is generally configured as a guide rail with a slider, the guide rail is fixedly disposed on the suspension arm, the slider is provided with a positioning member, the slider can be fixed on a certain position of the guide rail through the positioning member, the contact state between the tensioning wheel and the chain 35 can be adjusted through the movement of the slider on the guide rail, and when the chain 35 is in a tensioned state, the position of the slider is fixed through the positioning member, so that the tensioning effect of the tensioning wheel on the chain 35 is maintained.

It is worth pointing out that the adjusting part can also be arranged as a connecting structure of a screw rod and a screw block, specifically, the screw rod is arranged on the cantilever through a support, and the screw rod freely rotates; the spiral shell piece with lead screw threaded connection, just the spiral shell piece with the cantilever contact is connected, thereby avoids the spiral shell piece follows the lead screw rotates, the pivot is fixed to be set up on the spiral shell piece, through rotating the lead screw can realize right the spiral shell piece carries out position shift, thereby realizes the tensioning wheel is to the tensioning effect of chain 35.

The foregoing is only a preferred embodiment of the present invention, which is illustrative, not limiting. Those skilled in the art will appreciate that many variations, modifications, and equivalents may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An anti-wire winding mechanism for oral CBCT, comprising a cantilever, a rotary arm, a rotary component, a rotary arm offset component and an imaging device; the imaging device is arranged on the rotating arm, the cantilever and the rotating arm are driven to rotate relatively by the rotating assembly, and the cantilever and the rotating arm are driven to perform linear adjustment of relative positions by the rotating arm offset assembly; the rotating arm deviation assembly is provided with a connecting shaft, the connecting shaft is arranged on the rotating assembly, one end of the connecting shaft is fixed on the rotating arm, the cantilever and the rotating arm rotate around the axis of the connecting shaft, a rotating slip ring is arranged in the connecting shaft, and the rotating slip ring is connected with the cantilever and a circuit in the rotating arm.

2. The anti-wire winding mechanism for oral CBCT according to claim 1, wherein the rotating assembly comprises a driving motor, a driving chain wheel and a slewing bearing, the driving motor is fixedly arranged on the cantilever through a motor bracket, the driving chain wheel is arranged on an output shaft of the driving motor, the slewing bearing is fixed on the cantilever, and the driving chain wheel and the slewing bearing are in transmission connection through a chain.

3. The anti-wind mechanism for oral CBCT according to claim 2, wherein said rotary arm bias assembly comprises a brake assembly, a connection assembly and a turntable, said brake assembly and said connection assembly both being disposed on said turntable, said turntable being fixedly disposed on a gear of said slewing bearing.

4. The anti-wind mechanism for oral CBCT according to claim 3, wherein the brake assembly comprises a motor, a lead screw nut and a lead screw, both of which are disposed on the turntable, the lead screw nut and the lead screw being threadedly connected; coupling assembling include linear guide with the connecting axle, the connecting axle with slider fixed connection on the linear guide, the connecting axle with screw nut fixed connection.

5. The anti-wire winding mechanism for oral CBCT according to claim 4, characterized in that the turntable is provided with a connecting hole, the cantilever is provided with a through hole, and the connecting shaft passes through the connecting hole and the through hole in sequence to be connected with the rotating arm.

6. The anti-wire winding mechanism for oral CBCT as claimed in claim 1, wherein said connecting shaft is provided as a hollow structure and said rotating slip ring is provided within said connecting shaft.

7. The anti-wind mechanism for oral CBCT according to claim 6, wherein said rotary slip ring comprises a rotor, a stator and a brush, said stator and said rotor are respectively disposed at both ends of said connecting shaft, and said rotor and said stator are connected by said brush, said rotor and said stator can relatively rotate; the stator and the rotor are respectively connected with a power supply cable of the imaging device in the rotating arm and an external power circuit arranged in the cantilever.

8. The anti-wire winding mechanism for an oral CBCT as recited in claim 7, further comprising a slider linkage, the slider linkage being disposed within the cantilever; the sliding block connecting rod mechanism comprises a connecting rod, a first bearing, a second bearing, a moving block, a sliding rod and a sliding rod support, the end portion of the connecting rod is connected with the rotor on the rotating sliding ring through the first bearing, the other end portion of the connecting rod is connected with the moving block through the second bearing, the moving block is arranged on the sliding rod and can freely move on the sliding rod, and two ends of the sliding rod are fixed on the cantilever through the sliding rod support.

9. The anti-wire winding mechanism for oral CBCT according to claim 2, wherein said rotating assembly is provided with a tension wheel, said tension wheel is disposed between said driving sprocket and said slewing bearing, and said tension wheel is in contact connection with said chain.

10. The anti-wind mechanism for oral CBCT according to claim 2, further comprising a zero reference assembly, said zero reference assembly being a photoelectric switch disposed on said slewing bearing or an encoder disposed on said drive motor.