CN216908219U

CN216908219U - Balance arm for dental treatment machine tray

Info

Publication number: CN216908219U
Application number: CN202123310215.8U
Authority: CN
Inventors: 王东
Original assignee: Sinol Dental Ltd
Current assignee: Sinol Dental Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-07-08
Anticipated expiration: 2031-12-27

Abstract

The balance arm for the dental treatment mechanical tray is provided with a parallelogram structure consisting of a left connector, a right connector, a pull rod and a balance arm body, wherein one end of the pull rod and one end of the balance arm body are respectively hinged with the left connector, the other end of the pull rod and one end of the balance arm body are hinged with the right connector, and a brake valve, a brake valve fixing sleeve, a resistance adjusting nut, a damping sleeve, a balance adjusting nut, a fixing seat, a spring pull rod and a connecting rod are sequentially arranged in the balance arm body; one end of the connecting rod is connected with the left connector, and the other end of the connecting rod is hinged with the spring pull rod; the fixed seat is fixed with the balance arm body into a whole by a screw; the spring pull rod penetrates through the inner hole of the fixed seat; the spring pull rod is sleeved with a spring, the balance adjusting nut, the resistance adjusting nut and the brake valve fixing sleeve are connected with the spring pull rod sequentially through threads, and the brake valve is fixedly connected with the brake valve fixing sleeve. The utility model adopts a mechanical spring structure, and the balance arm has adjustable damping in rotation and up-and-down movement, so that the instrument tray is more flexible and stable in the movement process, and the operation of the instrument tray is easier.

Description

Balance arm for dental treatment machine tray

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a balance arm for a dental treatment machine tray.

Background

At present, instrument trays used by dental treatment machines need to be supported by balance arms so as to conveniently adjust the height of the tray and enable the tray to be stably stopped at any position in an adjusting range. The existing balance arm mostly adopts a parallelogram mechanism, utilizes the force of a spring to realize balance, and has the advantages of relatively simple structure, low cost, adjustable supporting force and suitability for instrument trays with different weights. However, there are some disadvantages that the difference of the supporting force generated by the spring is large when the balance arm moves between the upper limit position and the lower limit position, and the supporting force varies during the up-and-down movement of the balance arm, resulting in unbalanced force during operation, so that there is a need for improvement.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the utility model is as follows: the utility model provides a balance arm for a dental treatment machine tray, which adopts a mechanical spring structure to enable the supporting force to be adjustable within a specified range, adopts a damping adjusting structure to eliminate the difference value of the supporting force of the balance arm at the upper limit position and the lower limit position, adopts an air bag type brake valve, increases the friction area between the brake valve and an arm body, and enables the brake force to be larger.

The technical scheme adopted by the utility model is as follows: the balance arm for the dental treatment mechanical tray is provided with a parallelogram structure consisting of a left connector, a right connector, a pull rod and a balance arm body, wherein the left connector is connected with a fixed shaft, the right connector is connected with a rotating shaft of the instrument tray, one end of the pull rod and one end of the balance arm body are respectively hinged with the left connector, the other end of the pull rod and the other end of the balance arm body are respectively hinged with the right connector, and a brake valve, a brake valve fixing sleeve, a resistance regulating nut, a damping sleeve, a balance regulating nut, a spring, a fixing seat, a spring pull rod and a connecting rod are sequentially arranged in the balance arm body; one end of the connecting rod is hinged with the left connector, and the other end of the connecting rod is hinged with one end of the spring pull rod; the fixed seat is fixed with the balance arm body into a whole by a screw; the spring pull rod penetrates through the inner hole of the fixed seat; the spring pull rod is sleeved with a spring, the other end of the spring pull rod is provided with external threads, the balance adjusting nut, the resistance adjusting nut and the brake valve fixing sleeve are sequentially connected with the other end of the spring pull rod through threads, and the damping sleeve is arranged between the balance adjusting nut and the resistance adjusting nut; and the brake valve is fixedly connected with the brake valve fixing sleeve.

The technical scheme is further limited, the balance adjusting nut is screwed with the spring pull rod through threads to adjust different compression strokes of the spring, so that the supporting force of the balance arm body is adjusted; the damping sleeve is expanded after the resistance adjusting nut is screwed, the inner cavity of the balance arm body is extruded to generate friction resistance after the damping sleeve is expanded, and the friction resistance between the damping sleeve and the balance arm body is adjusted through the resistance adjusting nut.

The brake valve comprises a valve body, wherein an air inlet connector is arranged at one end of the valve body, an end cover is arranged at the other end of the valve body, a friction expansion sleeve is arranged between the valve body and the end cover, and the friction expansion sleeve can be completely contacted with an inner cavity of the balance arm body and generate friction resistance after expanding, so that the balance arm can be stably stopped at any position in a movable range.

The technical scheme is further limited, two ends of the pull rod are hinged with the left connector and the right connector through pin shafts II respectively; two ends of the balance arm body are respectively hinged with the left connector and the right connector through pin shafts I; and two ends of the connecting rod are respectively hinged with the left connector and the spring pull rod through pin shafts III.

In order to further limit the technical scheme, a bearing is arranged between the left connector and the fixed shaft; be equipped with friction disc and holding screw between left side connector and the fixed axle, the tight degree in top of pivoted flexibility ratio between left side connector and the fixed axle is adjusted the friction disc by holding screw.

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

1. the mechanical spring structure is adopted in the scheme, the supporting force can be adjusted within a specified range, and the balance arm has adjustable damping in rotation and up-and-down movement, so that the instrument tray is more flexible and stable in the movement process, the operation of the instrument tray is easier, and the mechanical spring structure is suitable for instrument trays with different weights;

2. in the scheme, the friction expansion sleeve of the brake valve is expanded and then is in complete contact with the inner cavity of the balance arm body, so that the friction area is increased, the braking force is larger, and the balance arm support is safe and stable;

3. in the scheme, the damping can be adjusted by the friction plate between the left connector and the fixed shaft, so that the left connector can flexibly rotate on the fixed shaft and does not deviate;

4. in the scheme, the resistance adjusting nut and the damping sleeve can adjust the damping moving up and down with the balance arm body, so that the difference value of the supporting force when the balance arm body is at the upper limit position and the lower limit position is effectively reduced;

5. the balance arm has the advantages of simple structure, convenience in installation and adjustment, effective improvement of working efficiency, and improvement of reliability and operation comfort of the balance arm.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the brake valve of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements" does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Referring to fig. 1-2, embodiments of the present invention are described in detail.

A balance arm for dental treatment machinery tray, as shown in fig. 1, has the parallelogram structure that comprises left connector 3, right connector 19, pull rod 12 and balance arm body 13, left side connector 3 is connected with fixed axle 2, right side connector 19 is connected with apparatus tray pivot 20. The two pull rods 12 are respectively arranged at two sides of the lower part of the balance arm body 13, one ends of the pull rods 12 and the balance arm body 13 are respectively hinged with the left connector 3, the other ends of the pull rods 12 and the balance arm body 13 are respectively hinged with the right connector 19, and specifically, two ends of each pull rod 12 are respectively hinged with the left connector 3 and the right connector 19 through pin shafts II 8; balance arm body 13 both ends are articulated with left connector 3 and right connector 19 respectively through round pin axle I6. Lubricating grease is required to be smeared on the matching surface of the shaft hole during installation.

A brake valve 18, a brake valve fixing sleeve 17, a resistance adjusting nut 16, a damping sleeve 15, a balance adjusting nut 14, a spring 11, a fixing seat 10, a spring pull rod 9 and a connecting rod 7 are sequentially arranged in the balance arm body 13; one end of the connecting rod 7 is hinged to the left connector 3, the other end of the connecting rod 7 is hinged to one end of the spring pull rod 9, and two ends of the connecting rod 7 are hinged to the left connector 3 and the spring pull rod 9 through pin shafts III 21 respectively. The fixed seat 10 is fixed with the balance arm body 13 into a whole by a screw; the spring pull rod 9 penetrates through an inner hole of the fixed seat 10; the spring pull rod 9 is sleeved with a spring 11, the other end of the spring pull rod 9 is provided with an external thread, the balance adjusting nut 14, the resistance adjusting nut 16 and the brake valve fixing sleeve 17 are sequentially connected with the other end of the spring pull rod 9 through threads, and the damping sleeve 15 is arranged between the balance adjusting nut 14 and the resistance adjusting nut 16; the brake valve 18 is fixedly connected with the brake valve fixing sleeve 17. When the structure is installed, lubricating grease is required to be coated on the matching surface of the shaft hole and the spring 11.

The balance adjusting nut 14 is screwed with the spring pull rod 9 through threads to adjust the spring 11 in different compression strokes, so that supporting force is provided for the balance arm body 13, and the supporting force of the balance arm body 13 can be adjusted through adjusting the difference of the compression strokes of the balance adjusting nut 14 on the spring 11, so that the balance adjusting nut is suitable for dental therapy apparatus instrument trays with different weights. The damping sleeve 15 is expanded after the resistance adjusting nut 16 is screwed, and the damping sleeve 15 is extruded to an inner cavity of the balance arm body 13 after being expanded to generate frictional resistance, so that the difference value of the supporting force of the balance arm at the upper limit position and the lower limit position can be counteracted to a certain degree. The frictional resistance between the damping sleeve 15 and the balance arm body 13 is adjusted by the resistance adjusting nut 16.

As shown in fig. 2, the brake valve 18 includes a valve body 1802, one end of the valve body 1802 is provided with an air inlet connector 1801, the other end of the valve body 1802 is provided with an end cover 1804, a friction expansion sleeve 1803 is arranged between the valve body 1802 and the end cover 1804, and the friction expansion sleeve 1803 can be fully contacted with an inner cavity of the balance arm body 13 after being expanded to generate friction resistance, so that the balance arm can be stably stopped at any position in an active range, the friction area is increased, the braking force is increased, and the support of the balance arm is safe and stable.

And a bearing 1 is arranged between the left connector 3 and the fixed shaft 2. Be equipped with friction disc 4 and holding screw 5 between left side connector 3 and the fixed axle 2, the tight degree in top of pivoted flexibility ratio between left side connector 3 and the fixed axle 2 friction disc 4 is adjusted by holding screw 5, makes the balance arm rotate nimble, steady.

When in use, the rotating shaft 20 of the instrument tray arranged on the right connector 19 is connected with the connecting frame of the therapeutic machine tray, the fixed shaft 2 is fixedly connected with the rotating arm, the balance tray is supported by the elasticity of the spring 11, the operation of the instrument tray is easy and free, and the rotation is flexible and reliable; the balance arm has the advantages of simple structure, convenience in installation, time saving, high working efficiency and good reliability and operation comfort of the balance arm.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A balance arm for dental treatment machinery tray has the parallelogram structure who comprises left connector (3), right connector (19), pull rod (12) and the balance arm body (13), left side connector (3) are connected with fixed axle (2), right side connector (19) are connected with apparatus tray pivot (20), pull rod (12) and balance arm body (13) one end are articulated with left connector (3) respectively, pull rod (12) and balance arm body (13) other end are articulated with right connector (19) respectively, its characterized in that: a brake valve (18), a brake valve fixing sleeve (17), a resistance adjusting nut (16), a damping sleeve (15), a balance adjusting nut (14), a spring (11), a fixing seat (10), a spring pull rod (9) and a connecting rod (7) are sequentially arranged in the balance arm body (13); one end of the connecting rod (7) is hinged with the left connector (3), and the other end of the connecting rod (7) is hinged with one end of the spring pull rod (9); the fixed seat (10) is fixed with the balance arm body (13) into a whole by a screw; the spring pull rod (9) penetrates through an inner hole of the fixed seat (10); a spring (11) is sleeved on the spring pull rod (9), an external thread is arranged at the other end of the spring pull rod (9), the balance adjusting nut (14), the resistance adjusting nut (16) and the brake valve fixing sleeve (17) are sequentially connected with the other end of the spring pull rod (9) through the thread, and the damping sleeve (15) is arranged between the balance adjusting nut (14) and the resistance adjusting nut (16); the brake valve (18) is fixedly connected with the brake valve fixing sleeve (17).

2. The balance arm for a dental treatment machine tray of claim 1, wherein: the balance adjusting nut (14) is screwed with the spring pull rod (9) through threads to adjust different compression strokes of the spring (11), so that the supporting force of the balance arm body (13) is adjusted; the damping sleeve (15) is expanded after the resistance adjusting nut (16) is screwed, the damping sleeve (15) is extruded into the inner cavity of the balance arm body (13) to generate friction resistance after being expanded, and the friction resistance between the damping sleeve (15) and the balance arm body (13) is adjusted through the resistance adjusting nut (16).

3. The balance arm for a dental treatment machine tray of claim 1, wherein: the brake valve (18) comprises a valve body (1802), wherein one end of the valve body (1802) is provided with an air inlet connector (1801), the other end of the valve body (1802) is provided with an end cover (1804), a friction expansion sleeve (1803) is arranged between the valve body (1802) and the end cover (1804), and the friction expansion sleeve (1803) can be in complete contact with an inner cavity of the balance arm body (13) after being expanded and generates friction resistance so that the balance arm can be stably stopped at any position in an active range.

4. The balance arm for a dental treatment machine tray of claim 1, wherein: both ends of the pull rod (12) are respectively hinged with the left connector (3) and the right connector (19) through pin shafts II (8); two ends of the balance arm body (13) are respectively hinged with the left connector (3) and the right connector (19) through pin shafts I (6); and two ends of the connecting rod (7) are hinged with the left connector (3) and the spring pull rod (9) through pin shafts III (21).

5. The balance arm for a dental treatment machine tray of claim 1, wherein: a bearing (1) is arranged between the left connector (3) and the fixed shaft (2); be equipped with friction disc (4) and holding screw (5) between left side connector (3) and fixed axle (2), the tight degree in top of pivoted flexibility ratio is adjusted friction disc (4) by holding screw (5) between left side connector (3) and fixed axle (2).