CN101339813B - Interval adjusting construction of moving component - Google Patents

Abstract

The invention discloses a gap adjustment structure of moving parts, which comprises a first part, a second part and an adjustment ring with an axial through hole, the first part has a housing, and the housing has a first surface, a second surface and the mounting holes that pass through the first and second surfaces, the second component is inserted into the mounting hole and can move axially relative to the first component, the adjusting ring is fitted into the mounting hole and rests on the housing to prevent adjustment The ring falls out of the limiting surface of the installation hole in the axial direction, the through hole of the adjustment ring is sleeved on the second component, and the adjustment ring and the installation hole, the through hole and the second component all have radial clearances. When the roundness of the second part is not high, the adjustment ring will move slightly in the radial direction through slight friction with the adjustment ring, so that the gap between the two tends to be uniform and the friction disappears, thus greatly reducing the axial force of the second part and its driving force. The lifting support and the verticality and roundness requirements of the lifting structure make assembly and production easier and simpler.

Description

Moving parts clearance adjustment structure

technical field

The present invention relates to a kinematic structure.

Background technique

The keyboard of the vehicle-mounted ultrasound instrument needs to be adjusted in height in order to be suitable for operators of different heights or different operating postures (sitting or standing postures) of the operators. Height adjustment is usually achieved by lifting the keyboard, and the keyboard support structure (including the appearance sleeve) also moves up and down accordingly. As shown in Figure 1, the existing height adjustment mechanism includes an appearance sleeve 6', a host shell 4', and a support and lifting structure 5' that drives the appearance sleeve 6' to rise and fall. The appearance sleeve 6' directly passes through the host shell 4' through hole, in order to ensure that there is no hard friction between the appearance sleeve and the host shell and keep the appearance sleeve and the keyboard moving up and down smoothly, it is necessary to leave a certain amount of gap C' between the appearance sleeve and the host shell.

However, the existing height adjustment mechanism has the following disadvantages: 1) The gap C' between the appearance sleeve and the fixed host shell cannot be adjusted, so the appearance sleeve 6', support and lifting structure 5' require high verticality and processing Assembly requirements; 2) In order to reduce the verticality and assembly requirements of the support and lifting structure and to prevent interference between the two when the appearance sleeve moves up and down, it is necessary to leave a large gap between the appearance sleeve and the main engine shell, so that There will be eccentricity between the appearance sleeve and the host shell, that is, the so-called uneven gap problem, which may also cause interference and hard friction; 3) When the roundness of the appearance sleeve and the through hole of the host shell is not high, the gap is not Even, the appearance is not beautiful enough.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a clearance adjustment structure for moving parts that can reduce production and processing requirements and is simple and quick to produce and assemble.

The technical solution adopted by the present invention to solve the technical problem is: the moving part gap adjustment structure includes a first part, a second part and an adjustment ring with an axial through hole, the first part has a housing, and the housing It has a first surface, a second surface and a mounting hole passing through the first and second surfaces. The second component is inserted into the mounting hole and can move axially relative to the first component. The adjusting ring is fitted into the mounting hole and rests on it. The limit surface of the housing is used to prevent the adjustment ring from falling out of the installation hole in the axial direction. The through hole of the adjustment ring is sleeved on the second part. With radial clearance.

The adjusting ring has a body and a first card edge, the through hole axially passes through the body, the first card edge extends radially from the outer contour surface of the body, and the outer diameter of the first card edge is larger than that of the mounting hole. The aperture, and the first card edge rests on the first surface of the housing, and the first surface is the limiting surface.

The adjustment ring also has a second card edge, which extends radially from the outer contour surface of the body, the outer diameter of the second card edge is larger than the diameter of the mounting hole, and the second card edge The axial gap is located below the second surface and there is an axial gap between them, and the axial gap is smaller than the radial gap between the adjusting ring and the installation hole.

The adjusting ring is I-shaped.

The mounting hole has a hole wall surface and a radial card groove recessed from the hole wall surface. The adjustment ring is installed in the card groove and placed on the groove bottom of the card groove. The bottom of the groove is the limit surface, and the adjustment ring and the clip The grooves have a radial clearance.

The adjusting ring is made of deformable soft material.

The second component is fixed on the supporting and lifting structure that drives its axial movement.

The beneficial effect of the present invention is that when the second part moves up and down in the axial direction and there is interference friction with the adjustment ring, the adjustment ring will move radially under the interference force to adjust the gap between the second part and the gap. Uniform, interference disappears, will not affect the appearance, even if the roundness of the mounting hole of the first part is not high, it will not be affected by installing a soft adjustment ring on it; when the roundness of the second part is not high, it will Slight friction with the adjustment ring makes the adjustment ring move in a small radial direction, so that the gap between the two tends to be uniform, and the friction disappears, thus greatly reducing the verticality of the second part and the support and lifting structure that drives its axial lift. , Roundness requirements, making assembly and production easier and simpler, reducing the possibility of hard friction between the first part and the second part.

Description of drawings

Fig. 1 is the structural representation of existing height adjusting mechanism;

Fig. 2 is a front view of the ultrasonic diagnostic instrument with the gap adjustment structure of the moving parts in this embodiment;

Fig. 3 is a right view of the ultrasonic diagnostic instrument with the gap adjustment structure of the moving parts in this embodiment;

Fig. 4 is a front sectional view of the gap adjustment structure of the moving parts in this embodiment;

Fig. 5 is a side sectional view of the gap adjustment structure of the moving parts in this embodiment;

Fig. 6 is the partial enlarged view of the place indicated by P in Fig. 4;

Fig. 7 is a three-dimensional exploded view of the gap adjustment structure of the moving parts in this embodiment;

Fig. 8 is a perspective view of the gap adjustment structure of the moving part in this embodiment.

Detailed ways

Please refer to Fig. 2 to Fig. 8, the gap adjustment structure of the moving parts in this embodiment includes a first part 4, a second part 6 and an adjustment ring 3, the first part has a mounting hole, and the adjustment ring is fitted into the mounting hole and entrapped the second component.

The first component 4 has a casing 41 , and the casing 41 has a first surface 411 , a second surface 412 and a mounting hole 413 passing through the first and second surfaces 411 , 412 . The second component 6 is a cylinder, which is inserted into the mounting hole 413 of the first component and can move axially relative to the first component 4 . The adjustment ring 3 is made of soft material, such as soft rubber, so that it can be deformed when extruded by external force. The section of the adjustment ring 3 is I-shaped, and the adjustment ring 3 has a body 31 , a first clamping edge 32 and a second clamping edge 33 . The main body 31 is cylindrical, with a through hole 311 axially penetrating in its central position, the first card edge 32 extends radially from the top end of the outer contour surface 312 of the main body 31, and the second card edge 33 extends from the outside of the main body. The bottom end of the contoured surface 312 extends radially, the first card edge 32 and the second card edge 33 are parallel, the first card edge 32 and the second card edge 33 are a complete circle, the first card edge 32, An annular groove 34 is formed between the second card edge 33 and the outer contour surface 312 of the main body. The outer diameter of the body 31 is smaller than the diameter of the installation hole 413 of the first component 4 , and the outer diameters of the first card edge 32 and the second card edge 33 are larger than the diameter of the installation hole 413 . The mounting hole 413 can be circular, square, polygonal or other shapes, and the shape of the adjusting ring 3 is designed according to the shape of the mounting hole 413 . The second component 6 can be a cylinder, and can also be a square cylinder, a polygon cylinder or cylinders of other shapes.

After the gap adjustment structure is assembled, the adjusting ring 3 is put into the mounting hole 413 of the first part 4, the hole edge 414 of the mounting hole 413 is inserted into the annular groove 34 of the adjusting ring 3, and the first card edge 32 of the adjusting ring 3 rests. On the first surface 411 of the housing 41, thereby preventing the adjustment ring from falling out of the installation hole under the action of gravity; the second card edge 33 of the adjustment ring 3 is located below the second surface 412 of the housing in the axial direction and is in contact with the second surface 412 has an axial gap A; the body 31 of the adjustment ring and the mounting hole 413 of the housing have a radial gap B; the second component 6 passes through the through hole 311 of the adjustment ring and has a radial gap C with the through hole 311 . In this embodiment, the axial gap A between the second surface 412 and the second card edge 33 is smaller than the radial gap B between the adjustment ring 3 and the mounting hole 413 , the axial gap is 0.3 mm, and the radial single side gap is 1.2 mm.

The working principle of the gap adjustment structure is as follows: when the second part 6 has interference friction with the adjustment ring 3 during the axial movement up and down, the adjustment ring 3 will move radially under the interference force to adjust the gap between the second part 6 and the second part 6. The gap between them makes the gap uniform, the interference disappears, and the appearance will not be affected. Even if the roundness of the mounting hole 413 of the first part is not high, it will not be affected in any way after the soft adjustment ring 3 is installed on it; the second When the roundness of the component 6 is not high, the adjustment ring 3 will be slightly deformed or moved in a small radial direction through slight friction with the adjustment ring 3, so that the gap between the two tends to be uniform and the friction disappears, thereby greatly reducing the second component. And the verticality and roundness requirements of the verticality and roundness requirements of the support for driving its axial lifting and the lifting structure make the assembly and production easier and simpler, and at the same time beautify the appearance and reduce the possibility of hard friction between the first part and the second part.

In this embodiment, the axial movement direction of the second component, the axial direction (axial direction) of the mounting hole and the axial direction (axial direction) of the through hole are consistent, and they are all up and down directions. The movement of the adjustment ring in the axial direction is limited by the first and second surfaces of the housing, and the axial gap between the second card edge of the adjustment ring and the second surface of the first component is the axial movement of the adjustment ring. The maximum displacement, since the axial clearance is a small amount (0.3mm as mentioned above), so the axial displacement of the adjusting ring is also a small amount. After the adjusting ring is axially moved into place, the first card edge 32 rests on the first surface 411 of the first component under the action of gravity. The movement of the adjustment ring 3 in the radial direction is limited by the installation hole 413, and the length of the first card edge 32 extending from the outer contour surface 312 of the body in the radial direction is greater than the unilateral radial gap between the body 31 and the installation hole 413 , when the adjusting ring 3 contacts the wall of the mounting hole 413 during radial movement, the first card edge 32 can still rest on the first surface 411 (that is, the first card edge 32 can completely cover the mounting hole 413), thereby ensuring Overall aesthetics.

In the present invention, the adjusting ring may only have a body and a first card edge at the top of the body. The outer diameter of the first card edge is larger than the diameter of the mounting hole of the first component. On the first surface; the adjusting ring can also only have a body and a card edge located in the middle of the body, the mounting hole of the first part has a circular hole wall surface and a radial annular card groove formed by indenting from the hole wall surface, and the card edge is on the first surface. It is radially loaded into the card slot, and the card edge and the card slot have a radial gap and rest on the bottom of the card slot; the adjustment ring can have a small amount of axial clearance with the installation hole of the first part and can Slight movement, and there is no axial clearance with the mounting hole and cannot move in the axial direction.

In the present invention, a soft adjusting ring 3 is installed at the mounting hole 413 of the first part; the outer diameters of the first and second card edges 32, 33 of the adjusting ring 3 can be large enough, and after the eccentric movement occurs, the first A card edge 32 is sufficient to cover the installation hole 413 of the first component 4; the adjustment ring 3 is stuck in the installation hole 413 of the first component by its first and second card edges 32, 33, and the adjustment ring 3 and the installation hole 413 has a large clearance fit in the radial direction (such as about 1.2mm on one side), and a small clearance fit in the axial direction (such as a clearance of 0.3mm), so the adjustment ring 3 can move freely in the radial direction. When the second part 6 When the gap between the adjustment ring 3 is uneven (caused by eccentricity or the roundness of the second part 6 is not high) and interference friction occurs, the adjustment ring 3 automatically adjusts the gap with the second part 6 under the interference friction force, so that the interference friction disappears , the gap tends to be uniform.

The gap adjustment structure of the moving parts of the present invention can be applied in the ultrasonic diagnostic instrument, as shown in Figure 2 and Figure 3, the first part 4 is the B-ultrasound host 4 of the ultrasonic diagnostic instrument, and the second part 6 is the appearance of the ultrasonic diagnostic instrument Sleeve 6, appearance The sleeve 6 is driven by the support and lifting mechanism 5 and can perform axial lifting movement. B-ultrasound keyboard 2 lifts to adapt to different operating situations. The gap adjustment structure of the moving parts of the present invention can also be applied to machine motion control equipment, medical diagnostic equipment, automated control equipment, video editing and production equipment, medical imaging systems, industrial and scientific instruments, test and measurement equipment, electromechanical microscopes And vision system, CAD/CAM/CAE equipment or computer graphics equipment, etc.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (9)

1. A gap adjustment structure for moving parts, comprising a first part and a second part, the first part has a housing, and the housing has a first surface, a second surface and a mounting hole penetrating the first and second surfaces , the second component is inserted into the installation hole and can move axially relative to the first component, and is characterized in that it also includes an adjustment ring, the adjustment ring has a body and a first card edge extending radially from the outer contour surface of the body , the body has a through hole axially penetrating, the outer diameter of the first card edge is larger than the hole diameter of the installation hole, the adjustment ring is fitted into the installation hole, and the first card edge rests on the housing to prevent the adjustment ring from On the limiting surface that axially falls out of the installation hole, the through hole of the adjustment ring is sleeved on the second component, and the body of the adjustment ring and the installation hole, the through hole and the second component all have radial clearances. 2 . The structure for adjusting the clearance of moving parts according to claim 1 , wherein the first clamping edge rests on a first surface of the casing, and the first surface is a limiting surface. 3 . 3. The structure for adjusting the clearance of moving parts according to claim 2, characterized in that: said adjusting ring further has a second card edge, and the second card edge extends radially from the outer contour surface of the body, and the first card edge The outer diameter of the second card edge is larger than the aperture of the mounting hole, and the second card edge is axially located below the second surface and has an axial gap between the two, and the axial gap is smaller than the radial gap between the adjustment ring and the mounting hole . 4. The structure for adjusting the clearance of moving parts according to claim 3, characterized in that: said adjusting ring is I-shaped. 5. The gap adjustment structure of moving parts according to claim 1, characterized in that: the mounting hole has a hole wall surface and a radial groove recessed from the hole wall surface, and the adjusting ring is put into the groove and rested on the groove On the bottom of the groove, the bottom of the groove is the limiting surface, and there is a radial clearance between the adjustment ring and the card groove. 6. The structure for adjusting the clearance of moving parts according to any one of claims 1-5, characterized in that the adjusting ring is made of deformable soft material. 7. The structure for adjusting the clearance of moving parts according to claim 6, characterized in that: the second part is fixed on a supporting and lifting structure that drives its axial movement. 8. The structure for adjusting the clearance of moving parts according to any one of claims 1-5, characterized in that: the second part is fixed on a supporting and lifting structure that drives its axial movement. 9. The structure for adjusting the clearance of moving parts according to claim 8, characterized in that: said adjusting ring is made of deformable soft material.

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