CN219895777U

CN219895777U - Be applied to rotatory U arm anti-unbalanced load's of oral cavity CBCT machine constructional device

Info

Publication number: CN219895777U
Application number: CN202321515327.3U
Authority: CN
Inventors: 高松; 孙成; 彭冲
Original assignee: Yi'an Medical Technology Haining Co ltd
Current assignee: Yi'an Medical Technology Haining Co ltd
Priority date: 2023-06-14
Filing date: 2023-06-14
Publication date: 2023-10-27
Anticipated expiration: 2033-06-14

Abstract

The utility model provides a structural device applied to oral cavity CBCT machine rotating U-arm unbalanced load resistance, and belongs to the technical field of oral cavity CBCT machine production. The utility model provides a be applied to rotatory U arm anti-unbalanced load's of oral cavity CBCT machine constructional device, includes xarm and U arm, its characterized in that, fixedly connected with roating seat on the xarm, back-to-back installs the angular contact deep groove bearing in the roating seat, it is connected with the hollow shaft to rotate on the angular contact deep groove bearing, the hollow shaft lower extreme is connected with the U arm. The utility model has the advantages that the rotary bearing adopts two angular contact ball bearings in a back-to-back installation mode, the bearing outer ring is absolutely fixed and cannot axially drive through jackscrew adjustment, the bearing clearance is compensated and adjusted by adopting a clearance adjusting gasket, the axial transmission of the bearing inner ring and the bearing outer ring cannot be ensured, the rotary shaft can be kept at a stable rotary center, and the rotary unbalance caused by different weights at two ends of the U-shaped arm and the fact that the rotary center is not at the gravity center position of the whole rotary module cannot be caused.

Description

Be applied to rotatory U arm anti-unbalanced load's of oral cavity CBCT machine constructional device

Technical Field

The utility model belongs to the technical field of oral cavity CBCT machine production, and relates to a structural device for preventing unbalanced load of a rotary U-arm of an oral cavity CBCT machine.

Background

U arm: the middle part is a cross arm, and the two ends of the cross arm are respectively fixed with a flat panel detector, a high-voltage bulb tube and a beam splitter module to form a U-shaped arm module assembly, so the U-shaped arm is called. Dental CBCT when taking panoramic shots, CBCT shots and head shadow measurement shots, the U-arm needs to be rotated quantitatively around the patient's dental arch or illuminated at a specific rotational angle. Because the material components at the two ends of the U arm are different and have different weights, and the rotation center is not at the central position of the rotating U arm, and the like, larger lateral unbalanced load can be generated during rotation, so that the motor is likely to stop or lose steps when the U arm is started and stopped in rotation and accelerated. The existing technology adopts the mode of two-end counterweight to solve the weight inconsistency at two ends, and the gravity center of the U-arm is matched to the rotation center through the counterweight, but the weight of the whole U-arm can be much heavier, the weight of the whole machine can be relatively heavy, and the material cost is greatly increased.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides a structural device for preventing unbalanced load of a rotating U-arm of an oral cavity CBCT machine, which solves the problems that the weights of two ends of the U-arm are different, the rotating unbalance exists, and the weight of the whole U-arm is increased in a counterweight mode.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a be applied to rotatory U arm anti-unbalanced load's of oral cavity CBCT machine constructional device, includes xarm and U arm, its characterized in that, fixedly connected with roating seat on the xarm, back-to-back installs the angular contact deep groove bearing in the roating seat, it is connected with the hollow shaft to rotate on the angular contact deep groove bearing, the hollow shaft lower extreme is connected with the U arm.

In the structural device applied to the oral cavity CBCT machine rotating U-arm anti-unbalanced load, the hollow shaft is connected with the synchronous belt wheel through the screw.

In the structural device applied to the oral cavity CBCT machine rotating U-arm anti-unbalanced load, the limiting block is connected to the synchronous belt wheel through the screw.

In the structural device applied to the oral cavity CBCT machine rotating U-arm anti-unbalanced load, the compression ring is connected with the screw in the rotating seat, and the jackscrew is arranged in the angular contact deep groove bearing.

In the structural device applied to the oral cavity CBCT machine rotating U-arm anti-unbalanced load, the lower end screw of the hollow shaft is connected with the half shaft, and the lower end of the half shaft is fixedly connected with the U-arm.

In the structural device applied to the oral cavity CBCT machine rotating U-arm anti-unbalanced load, a gap piece is arranged at the joint of the hollow shaft and the half shaft.

Compared with the prior art, the utility model has the following advantages:

the bearing is in an absolute fixed mode through jackscrew adjustment, the bearing outer ring is not in axial transmission, the bearing clearance is compensated and adjusted by adopting the clearance adjusting gaskets, the bearing inner ring and the bearing outer ring are ensured not to be in axial transmission, the rotating shaft can be kept at a stable rotating center, and the rotating unbalance caused by different weights at two ends of the U arm and the fact that the rotating center is not at the gravity center position of the whole rotating module is avoided.

Drawings

FIG. 1 is a schematic elevational view of the present utility model;

FIG. 2 is a schematic top view of the present utility model;

FIG. 3 is a schematic view of the structure of the synchronous pulley of the present utility model;

FIG. 4 is a cross-sectional view A-A of the present utility model;

FIG. 5 is a schematic view of the structure of the rotary seat of the present utility model;

FIG. 6 is an N-N cross-sectional view of the present utility model;

fig. 7 is an M-M cross-sectional view of the present utility model.

In the drawing the view of the figure,

2. a cross arm; 3. a U-arm; 4. a rotating seat; 5. angular contact deep groove bearings; 6. a hollow shaft; 7. a synchronous pulley; 8. a limiting block; 9. a compression ring; 10. a jackscrew; 11. a half shaft; 12. a gap piece.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in figures 1 to 7 of the drawings,

the utility model provides a be applied to rotatory U arm anti-unbalanced load's of oral cavity CBCT machine constructional device, includes xarm 2 and U arm 3, its characterized in that, fixedly connected with roating seat 4 on the xarm 2, back-to-back installs angular contact deep groove bearing 5 in the roating seat 4, it is connected with hollow shaft 6 to rotate on the angular contact deep groove bearing 5, hollow shaft 6 lower extreme is connected with U arm 3.

In this embodiment, the rotation of the hollow shaft 6 drives the U-shaped wall to rotate, and the rotating bearing adopts two angular contact ball bearings, which are mounted back to back, so that the outer ring of the bearing is absolutely fixed and cannot be axially driven.

In this embodiment, the hollow shaft 6 is screwed with a synchronous pulley 7. The hollow shaft 6 is driven to rotate through the synchronous pulley 7, so that the U-arm 3 rotates.

In this embodiment, a stopper 8 is screwed to the synchronous pulley 7. The rotation angle of the synchronous pulley 7 is limited by a limiting block 8.

In this embodiment, a pressing ring 9 is screwed in the rotary seat 4, and a jackscrew 10 is disposed in the angular contact deep groove bearing 5. The bearing outer ring is absolutely fixed and cannot be axially driven by adjusting the jackscrew 10.

In the embodiment, a half shaft 11 is connected to the lower end of the hollow shaft 6 through a screw, and the lower end of the half shaft 11 is fixedly connected with the U-shaped arm 3.

In this embodiment, a gap piece 12 is provided at the junction of the hollow shaft 6 and the half shaft 11. The clearance adjustment gasket is adopted for compensating and adjusting the clearance of the angular contact deep groove bearing 5, so that the axial transmission of the inner ring and the outer ring of the bearing is avoided, the rotating shaft can be kept at a stable rotating center, and the rotating unbalance caused by the weight difference of the two ends of the U arm 3 and the fact that the rotating center is not at the gravity center position of the whole rotating module is avoided.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. Meanwhile, the meaning of "and/or" appearing throughout the text is to include three schemes, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

All the components are general standard components or components known to the person skilled in the art, and the structures and principles of the components are known to the person skilled in the art through technical manuals or through routine experimental methods.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. Be applied to rotatory U arm anti-unbalanced load's of oral cavity CBCT machine constructional device, including xarm (2) and U arm (3), its characterized in that, fixedly connected with roating seat (4) on xarm (2), back-to-back installs angular contact deep groove bearing (5) in roating seat (4), it is connected with hollow shaft (6) to rotate on deep groove bearing (5), hollow shaft (6) lower extreme is connected with U arm (3).

2. The structural device for preventing unbalanced load of the rotating U-arm of the oral CBCT machine according to claim 1, wherein a synchronous pulley (7) is connected to the hollow shaft (6) through screws.

3. The structural device for preventing unbalanced load of the rotating U-arm of the oral CBCT machine according to claim 2 is characterized in that a limiting block (8) is connected to the synchronous pulley (7) through screws.

4. The structural device for preventing unbalanced load of the rotary U arm of the oral CBCT machine according to claim 1, wherein a compression ring (9) is connected in the rotary seat (4) through screws, and a jackscrew (10) is arranged in the angular contact deep groove bearing (5).

5. The structural device for preventing unbalanced load of the rotary U-arm of the oral CBCT machine according to claim 1, wherein a half shaft (11) is connected to the lower end of the hollow shaft (6) through screws, and the lower end of the half shaft (11) is fixedly connected with the U-arm (3).

6. The structural device for anti-unbalanced load applied to the rotating U arm of the oral CBCT machine according to claim 5, wherein a gap piece (12) is arranged at the joint of the hollow shaft (6) and the half shaft (11).