CN216061197U

CN216061197U - Balance arm

Info

Publication number: CN216061197U
Application number: CN202122223303.8U
Authority: CN
Inventors: 吕冰; 周元旺; 黄学华; 李志杰; 成一铭
Original assignee: Guangzhou Ajax Medical Equipment Co Ltd
Current assignee: Guangzhou Ajax Medical Equipment Co Ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-03-18
Anticipated expiration: 2031-09-14

Abstract

The utility model belongs to the technical field of mechanical equipment, and particularly relates to a balance arm which comprises a first joint, a connecting mechanism, a limiting mechanism, an adjusting mechanism and a second joint, wherein the first joint and the second joint are vertically arranged, the middle part of the first joint and the middle part of the second joint are respectively hinged with two ends of the connecting mechanism, the upper end part of the first joint is connected with the connecting mechanism through the limiting mechanism, and the upper end part of the second joint is connected with the connecting mechanism through the adjusting mechanism. The distance between the first pin shaft and the second pin shaft is adjusted along with the rotation of the first transmission rod, so that the size of an included angle between the second joint and the connecting mechanism is adjusted, the first pin shaft and the second pin shaft move oppositely or move reversely at the same time, the second joint and the first joint are kept in a vertical parallel arrangement, one-step in-place rapid adjustment is realized, the stress of the whole equipment is uniform, and the service life is prolonged.

Description

Balance arm

Technical Field

The utility model belongs to the technical field of mechanical equipment, and particularly relates to a balance arm.

Background

The dental therapeutic machine comprises a base and a chair frame, wherein a cushion and a backrest are installed on the chair frame, a headrest is installed at the upper end of the backrest, a water tank is installed on the chair frame, a spittoon with flushing and water supplying functions is installed on the water tank, a rotating arm connected with the water tank in a rotating mode is installed on the water tank, an instrument disk balancing arm connected with the rotating arm in a rotating mode is installed on the rotating arm, and an instrument disk connected with the rotating arm in a rotating mode is installed at the other end of the instrument disk balancing arm.

The common balance arm on the market sends abnormal sound or rocks the problem when up-and-down motion now, and the atress is uneven, influences the use and experiences. In addition, in the using process, the instrument plate is difficult to level in one step, and the using experience is poor.

In view of the above, the related art needs to be perfected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the utility model provides a balance arm, aims at solving how to carry out one-step to put in place quick adjustment to the joint of balance arm for the problem of atress is even.

In order to achieve the above object, the present invention provides a balance arm, which includes a first joint, a connection mechanism, a limiting mechanism, an adjusting mechanism and a second joint, wherein the first joint and the second joint are vertically disposed, the middle portion of the first joint and the middle portion of the second joint are respectively hinged to two ends of the connection mechanism, the upper end portion of the first joint is connected to the connection mechanism through the limiting mechanism, the upper end portion of the second joint is connected to the connection mechanism through the adjusting mechanism, the adjusting mechanism includes a first transmission rod, a first pin shaft and a second pin shaft, the first pin shaft is clamped to the upper end portion of the second joint, the second pin shaft is clamped to the connection mechanism, the first transmission rod sequentially penetrates through the middle portions of the first pin shaft and the second pin shaft and is in transmission connection with the middle portions of the first pin shaft and the second pin shaft, the first transmission rod drives the first pin shaft and the second pin shaft to move in opposite directions or in reverse directions.

In one embodiment, the connecting mechanism comprises two connecting plates, and the two connecting plates are oppositely arranged in parallel.

In one embodiment, the limiting mechanism includes a second transmission rod, a first positioning block, a second positioning block, an elastic structure, a third positioning block, and a locking structure, the first positioning block is hinged to the upper end of the second joint, two ends of the elastic structure are respectively connected to the second positioning block and the third positioning block, the second transmission rod sequentially penetrates through the first positioning block and the second positioning block and is in transmission connection with the first positioning block and the second positioning block, the third positioning block, and the locking structure are all clamped between the two connecting plates, and the locking structure is in abutting contact with the third positioning block.

In one embodiment, the locking structure includes the stopper and set up in a plurality of locking unit of stopper, locking unit includes gas pocket and two pistons, the gas pocket runs through the stopper, two the piston slide set up in the both ends of gas pocket, two the piston all with the inner wall interference fit of gas pocket, two the connecting plate is provided with the spacing groove that the symmetry set up respectively, two the piston respectively with two the spacing groove one-to-one sets up relatively.

In one embodiment, the middle of the air hole is provided with a through hole which penetrates through the side wall of the air hole.

In one embodiment, the first joint and the second joint are both columnar structures, and the first joint and the second joint are vertically arranged in parallel.

In one embodiment, the limiting mechanism further comprises a clamping groove, and the third positioning block is clamped in the clamping groove and hinged to the clamping groove.

In one embodiment, the locking structure is disposed in a groove of the locking structure.

In one embodiment, the outer end of the first driving rod is provided with an adjusting structure.

In one embodiment, the balance arm further comprises a housing, and two ends of the housing are hinged to the middle of the first joint and the middle of the second joint respectively through clamping pins.

The utility model has the beneficial effects that: in practical application, the limiting mechanism is used for adjusting and limiting the size of an included angle between the first joint and the connecting mechanism; the adjusting mechanism is used for adjusting the size of an included angle between the second joint and the connecting mechanism; the middle part of the first joint and the middle part of the second joint are respectively hinged with two ends of the connecting mechanism, so that a first connecting limit point is arranged between the first joint, the second joint and the connecting mechanism, the upper end part of the first joint is connected with the connecting mechanism through the limiting mechanism, namely the upper end part of the first joint is a second connecting limit point between the first joint and the connecting mechanism, and the first joint is restrained and fixed by the two connecting limit points and is kept to be vertically arranged; the first pin shaft clamp is arranged in the second joint, the second pin shaft clamp is arranged in the connecting mechanism, the first transmission rod is in transmission connection with the first pin shaft and the second pin shaft, a second connection limiting point between the second joint and the connecting mechanism is formed, the second joint is restrained and fixed, when the second joint point and the first joint point are not in parallel vertical arrangement, the first transmission rod is rotated, the distance between the first pin shaft and the second pin shaft is adjusted along with the rotation of the first transmission rod, the first pin shaft and the second pin shaft move oppositely or move reversely at the same time, and therefore the size of an included angle between the second joint and the connecting mechanism is adjusted, the second joint and the first joint are kept in vertical parallel arrangement, one-step in-place rapid adjustment is achieved, the whole equipment is enabled to be evenly stressed, and the service life is prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is an exploded view of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional structural view of an embodiment of the present invention;

FIG. 3 is a partial schematic view of an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an embodiment of the present invention for adjusting different angles;

wherein: 1. a first joint; 2. a connecting mechanism; 21. a connecting plate; 211. a limiting groove; 3. a limiting mechanism; 31. a second transmission rod; 32. a first positioning block; 33. a second positioning block; 34. an elastic structure; 35. a third positioning block; 36. a locking structure; 361. a limiting block; 362. a locking unit; 3621. air holes; 3622. a piston; 37. a card slot; 4. an adjustment mechanism; 41. a first drive lever; 42. a first pin shaft; 43. a second pin shaft; 5. a second joint; 6. a housing; 7. a bayonet lock.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

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

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited thereto.

Referring to fig. 1 to 3, an embodiment of the present application provides a balance arm, including a first joint 1, a connecting mechanism 2, a limiting mechanism 3, an adjusting mechanism 4, and a second joint 5, where the first joint 1 and the second joint 5 are vertically disposed, a middle portion of the first joint 1 and a middle portion of the second joint 5 are respectively hinged to two ends of the connecting mechanism 2, an upper end portion of the first joint 1 is connected to the connecting mechanism 2 through the limiting mechanism 3, an upper end portion of the second joint 5 is connected to the connecting mechanism 2 through the adjusting mechanism 4, the adjusting mechanism 4 includes a first transmission rod 41, a first pin 42, and a second pin 43, the first pin 42 is clamped to an upper end portion of the second joint 5, the second pin 43 is clamped to the connecting mechanism 2, the first transmission rod 41 sequentially penetrates through the middle portions of the first pin 42 and the second pin 43 and is in transmission connection with the middle portions of the first pin 42 and the second pin 43, the first transmission rod 41 drives the first pin 42 and the second pin 43 to move towards or away from each other.

In practical application, the first transmission rod 41 is a screw rod with two ends respectively provided with an orthodontic tooth and a counter-orthodontic tooth, and the limiting mechanism 3 is used for adjusting and limiting the size of an included angle between the first joint 1 and the connecting mechanism 2; the adjusting mechanism 4 is used for adjusting the size of an included angle between the second joint 5 and the connecting mechanism 2; the middle part of the first joint 1 and the middle part of the second joint 5 are respectively hinged with two ends of the connecting mechanism 2, so that a first connecting limit point is arranged between the first joint 1, the second joint 5 and the connecting mechanism 2, the upper end part of the first joint 1 is connected with the connecting mechanism 2 through the limiting mechanism 3, namely the upper end part of the first joint 1 is a second connecting limit point between the first joint 1 and the connecting mechanism 2, and the first joint 1 is restrained and fixed by the two connecting limit points and keeps vertical arrangement; the first pin shaft 42 is clamped in the second joint 5, the second pin shaft 43 is clamped in the connecting mechanism 2, the first transmission rod 41 is in transmission connection with the first pin shaft 42 and the second pin shaft 43 to form a second connection limit point between the second joint 5 and the connecting mechanism 2, the second joint 5 is restrained and fixed, when the second joint 5 and the first joint 1 are not in parallel vertical arrangement, the first transmission rod 41 is rotated, the distance between the first pin shaft 42 and the second pin shaft 43 is adjusted along with the rotation of the first transmission rod 41, so that the first pin shaft 42 and the second pin shaft 43 simultaneously move oppositely or reversely, the size of an included angle between the second joint 5 and the connecting mechanism 2 is adjusted, the second joint 5 and the first joint 1 are kept in vertical parallel arrangement, further in-place rapid adjustment is realized, and the stress of the whole equipment is uniform, the service life is prolonged.

Referring to fig. 1 to 3, in one embodiment, the connecting mechanism 2 includes two connecting plates 21, and the two connecting plates 21 are disposed in parallel.

In practical applications, the arrangement of the connecting mechanism 2 with two connecting plates 21 is beneficial to increase the stability in operation.

Referring to fig. 2 to 4, in an embodiment, the limiting mechanism 3 includes a second transmission rod 31, a first positioning block 32, a second positioning block 33, an elastic structure 34, a third positioning block 35, and a locking structure 36, the first positioning block 32 is hinged to an upper end of the second joint 5, two ends of the elastic structure 34 are respectively connected to the second positioning block 33 and the third positioning block 35, the second transmission rod 31 sequentially penetrates through the first positioning block 32 and the second positioning block 33 and is in transmission connection with the first positioning block 32 and the second positioning block 33, the third positioning block 35, and the locking structure 36 are all clamped between the two connecting plates 21, and the locking structure 36 is abutted against the third positioning block 35.

In practice, the resilient structure 34 is preferably a spring; in operation, the distance between the first positioning block 32 and the second positioning block 33 can be adjusted by rotating the second transmission rod 31, so as to finely adjust the included angle between the first joint 1 and the connecting mechanism 2, in practical application, when the position of the integral balance arm needs to be adjusted to a large extent, the locking between the locking structure 36 and the two connecting plates 21 is firstly released, then the connecting mechanism 2 is adjusted, so that the adjusting mechanism 4 moves to a working area, and finally the locking between the locking structure 36 and the two connecting plates 21 is started, at this time, the locking structure 36 abuts against and limits the position of the third positioning block 35, so that the size of the included angle between the first joint 1 and the connecting mechanism 2 is kept unchanged, in operation, when the second joint 5 bears the load, the elastic structure 34 is compressed to generate deformation, so as to play a role of buffering the weight, when the second joint 5 does not bear the load, the elastic structure 34 recovers the deformation, the first joint 1 and the connecting mechanism 2 are prevented from being rigidly connected and brittle fracture is avoided.

Referring to fig. 2 to 4, in an embodiment, the locking structure 36 includes a limiting block 361 and a plurality of locking units 362 disposed on the limiting block 361, the locking units 362 include air holes 3621 and two pistons 3622, the air holes 3621 penetrate through the limiting block 361, the two pistons 3622 are slidably disposed at two ends of the air holes 3621, the two pistons 3622 are in interference fit with an inner wall of the air holes 3621, the two connecting plates 21 are respectively disposed with symmetrically disposed limiting grooves 211, and the two pistons 3622 are respectively disposed in one-to-one correspondence with the two limiting grooves 211.

In practical application, gas is introduced into the gas hole 3621, the gas pressure inside the gas hole 3621 is increased, so that the two pistons 3622 are pushed to move towards the outer sides of the two ends of the gas hole 3621, and finally the two pistons are abutted and clamped with the two limiting grooves 211 in the connecting mechanism 2 in a one-to-one correspondence manner, so that locking and fixing are realized; the air in the air hole 3621 is pumped out, the air pressure in the air hole 3621 is reduced, and the two pistons 3622 move towards the middle of the air hole 3621 under the action of the atmospheric pressure, so that the two pistons 3622 are separated from the limiting groove 211 respectively, locking is loosened, the size of an included angle between the first joint 1 and the connecting mechanism 2 is adjusted greatly, and the integral balance arm is adjusted to a working area.

Referring to fig. 1 to 3, in an embodiment, a through hole is formed in a middle portion of the air hole 3621, and the through hole penetrates through a sidewall of the air hole 3621.

In practical application, the through hole is communicated with the air pump through an air pipe, so that the air pump can inflate or deflate the inside of the air hole 3621, and locking or unlocking of the locking structure 36 is achieved.

Referring to fig. 1 to 3, in an embodiment, the first joint 1 and the second joint 5 are both of a column structure, and the first joint 1 and the second joint 5 are vertically arranged in parallel.

In practical application, the structural design is beneficial to realize connection and fixation through the first joint 1 and the second joint 5.

Referring to fig. 1 to 3, in an embodiment, the limiting mechanism 3 further includes a locking groove 37, and the third positioning block 35 is locked in the locking groove 37 and hinged to the locking groove 37.

In practical application, the clamping groove 37 slides between the two connecting plates 21, the third positioning block 35 is limited through the clamping groove 37, and the structural design is favorable for adjusting the size of an included angle between the first joint 1 and the connecting mechanism 2.

Referring to fig. 1 to 3, in one embodiment, the locking slot 37 is a U-shaped structure, and the locking structure 36 is disposed in contact with the locking slot 37.

In practical application, the clamping groove 37 is of a U-shaped structure, so that raw materials can be saved, the cost can be reduced, and meanwhile, the stability of the sliding of the clamping groove 37 between the two connecting plates 21 can be improved.

Referring to fig. 1 to 3, in one embodiment, an adjusting structure is disposed at an outer end of the first driving rod 41.

In practical applications, the first driving rod 41 is rotated by the adjusting structure, and the first driving rod 41 is rotationally adjusted by a screwdriver or a wrench contacting the first driving rod 41.

Referring to fig. 1, 2 and 4, in one embodiment, the balance arm further includes a housing 6, and both ends of the housing 6 are hinged to the middle of the first joint 1 and the middle of the second joint 5 by means of a bayonet 7.

In practical application, the shell 6 is arranged to avoid the interference of the external environment on the operation of the whole equipment, so that the stability of the operation of the whole equipment is improved.

The above are merely alternative embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A balance arm, characterized by: comprises a first joint (1), a connecting mechanism (2), a limiting mechanism (3), an adjusting mechanism (4) and a second joint (5), wherein the first joint (1) and the second joint (5) are vertically arranged, the middle part of the first joint (1) and the middle part of the second joint (5) are respectively hinged with the two ends of the connecting mechanism (2), the upper end part of the first joint (1) is connected with the connecting mechanism (2) through the limiting mechanism (3), the upper end part of the second joint (5) is connected with the connecting mechanism (2) through the adjusting mechanism (4), the adjusting mechanism (4) comprises a first transmission rod (41), a first pin shaft (42) and a second pin shaft (43), the first pin shaft (42) is clamped at the upper end part of the second joint (5), the second pin shaft (43) is clamped at the connecting mechanism (2), the first transmission rod (41) penetrates through the middle of the first pin shaft (42) and the middle of the second pin shaft (43) in sequence and is in transmission connection with the middle of the first pin shaft (42) and the middle of the second pin shaft (43), and the first transmission rod (41) drives the first pin shaft (42) and the second pin shaft (43) to move oppositely or reversely.

2. The balance arm of claim 1, wherein: the connecting mechanism (2) comprises two connecting plates (21), and the two connecting plates (21) are arranged in parallel relatively.

3. The balance arm of claim 2, wherein: the limiting mechanism (3) comprises a second transmission rod (31), a first positioning block (32), a second positioning block (33), an elastic structure (34), a third positioning block (35) and a locking structure (36), the first positioning block (32) is hinged with the upper end part of the second joint (5), two ends of the elastic structure (34) are respectively connected with the second positioning block (33) and the third positioning block (35), the second transmission rod (31) penetrates through the first positioning block (32) and the second positioning block (33) in sequence, and is in transmission connection with the first positioning block (32) and the second positioning block (33), the second positioning block (33), the third positioning block (35) and the locking structure (36) are clamped between the two connecting plates (21), the locking structure (36) is abutted against the third positioning block (35).

4. The balance arm of claim 3, wherein: locking structure (36) include stopper (361) and set up in a plurality of locking unit (362) of stopper (361), locking unit (362) are including gas pocket (3621) and two pistons (3622), gas pocket (3621) run through stopper (361), two piston (3622) slide set up in the both ends of gas pocket (3621), two piston (3622) all with the inner wall interference fit of gas pocket (3621), two connecting plate (21) are provided with spacing groove (211) that the symmetry set up respectively, two piston (3622) respectively with two spacing groove (211) one-to-one sets up relatively.

5. The balance arm of claim 4, wherein: the middle part of the air hole (3621) is provided with a through hole which penetrates through the side wall of the air hole (3621).

6. The balance arm of claim 1, wherein: the first joint (1) and the second joint (5) are both columnar structures, and the first joint (1) and the second joint (5) are vertically arranged in parallel.

7. The balance arm of claim 3, wherein: the limiting mechanism (3) further comprises a clamping groove (37), and the third positioning block (35) is clamped in the clamping groove (37) and hinged to the clamping groove (37).

8. The balance arm of claim 7, wherein: the clamping groove (37) is of a U-shaped structure, and the locking structure (36) is abutted to the clamping groove (37).

9. The balance arm of claim 1, wherein: the outer end of the first transmission rod (41) is provided with an adjusting structure.

10. The balance arm of claim 1, wherein: the balance arm further comprises a shell (6), and two ends of the shell (6) are hinged to the middle of the first joint (1) and the middle of the second joint (5) through clamping pins (7) respectively.