CN106388844B - Telescopic mechanism and portable digital X-ray machine - Google Patents
Telescopic mechanism and portable digital X-ray machine Download PDFInfo
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- CN106388844B CN106388844B CN201611131819.7A CN201611131819A CN106388844B CN 106388844 B CN106388844 B CN 106388844B CN 201611131819 A CN201611131819 A CN 201611131819A CN 106388844 B CN106388844 B CN 106388844B
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4405—Constructional features of apparatus for radiation diagnosis the apparatus being movable or portable, e.g. handheld or mounted on a trolley
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Abstract
The application relates to the technical field of medical devices, in particular to a telescopic mechanism and a portable digital X-ray machine. The telescopic mechanism comprises a telescopic component, the telescopic component comprises an outer cylinder, a middle cylinder, an inner cylinder, a first roller, a second roller, a first flexible connecting part and a second flexible connecting part, the outer cylinder, the middle cylinder and the inner cylinder are mutually in sliding insertion, and the first flexible connecting part and the second flexible connecting part bypass the first roller and the second roller respectively; the first end of the first flexible connecting part is fixed on the outer cylinder, and the second end is fixed on the inner cylinder; the third end of the second flexible connecting part is fixed on the outer cylinder, and the fourth end is fixed on the inner cylinder. The portable digital X-ray machine provided by the application adopts the telescopic mechanism, reduces the occupied space and is convenient to carry and transport.
Description
Technical Field
The application relates to the technical field of medical devices, in particular to a telescopic mechanism and a portable digital X-ray machine.
Background
The portable digital X-ray machine is widely applied to the rapid, efficient and accurate medical diagnosis of sick and wounded under the field combat condition due to the small volume, light weight, simple and convenient operation, high reliability and the like.
Current portable X-ray photographic apparatus, in order to satisfy smallly, adjust the stroke of combination aircraft nose along vertical direction and then satisfy clinical demand usually through the lift of telescopic column in vertical direction, the telescopic column includes two telescopic links that can mutually slide, through the mutual slip between the two to increase the stroke of combination aircraft nose along vertical direction.
However, the stroke that can be extended or shortened is limited for the two-section telescopic rod, so that the actual clinical requirement cannot be met by adopting the conventional telescopic column to extend or shorten in the vertical direction, and the telescopic column is high in overall height due to the fact that the telescopic rod is too long, so that the occupied space is large, and the carrying and the transportation are inconvenient. Therefore, there is a need to develop a new telescopic mechanism.
Disclosure of Invention
The application provides a telescopic mechanism and a portable digital X-ray machine, which can solve the problems.
The first aspect of the application provides a telescopic mechanism comprising a telescopic component, wherein the telescopic component comprises an outer cylinder, a middle cylinder, an inner cylinder, a first roller, a second roller, a first flexible connecting part and a second flexible connecting part,
the middle cylinder is inserted into the outer cylinder in a sliding manner along the direction parallel to the axis of the middle cylinder; the inner cylinder is inserted into the middle cylinder in a sliding manner along the direction parallel to the axis;
the first roller and the second roller are respectively connected with the middle cylinder in a rotating way along a rotating shaft perpendicular to the axis;
the first flexible connecting part comprises a first end and a second end, the first end is fixed on the outer cylinder, and the second end bypasses the first roller and is fixed on the inner cylinder; the second flexible connecting part comprises a third end and a fourth end, the third end is fixed on the outer cylinder, and the fourth end bypasses the second roller and is fixed on the inner cylinder;
and along the extending direction of the axis, the second end and the fourth end are both positioned between the first roller and the second roller, the first end and the second end are positioned on the same side of a first reference surface, the third end and the fourth end are positioned on the same side of a second reference surface, the first reference surface passes through the rotating shaft of the first roller and is perpendicular to the axis, and the second reference surface passes through the rotating shaft of the second roller and is perpendicular to the axis.
Preferably, the first end is located between the first roller and the second roller.
Preferably, the device further comprises a transition piece, wherein one end of the transition piece is connected to the bottom of the outer barrel, and the other end of the transition piece extends away from the top of the outer barrel; the first end is connected to an end of the transition piece remote from the base.
Preferably, the third end is located at the bottom of the outer barrel along the extending direction of the axis.
Preferably, the rotation axis of the first roller is parallel to the rotation axis of the second roller.
Preferably, the first roller is provided with a limit groove along the rotation direction, and the part of the first flexible connecting part, which is attached to the first roller, is positioned in the limit groove;
and/or
The second roller is provided with a limiting groove along the rotation direction of the second roller, and the part, attached to the second roller, of the second flexible connecting part is located in the limiting groove.
Preferably, the telescopic assembly further comprises a sliding rail,
the sliding rail is arranged between the outer cylinder and the middle cylinder, and the middle cylinder is slidably arranged on the outer cylinder through the sliding rail;
and/or
The sliding rail is arranged between the inner cylinder and the middle cylinder, and the inner cylinder is slidably mounted on the middle cylinder through the sliding rail.
Preferably, the outer circumferential surface of at least one of the first roller and the second roller is a cylindrical surface.
Preferably, the outer circumferential surface of the first roller is a cylindrical surface, and the first flexible connecting part is a steel wire rope;
and/or
The outer peripheral surface of the second roller is a cylindrical surface, and the second flexible connecting part is a steel wire rope.
Preferably, the telescopic assembly further comprises a force balance assembly, one end of the force balance assembly is connected with the middle cylinder, the other end of the force balance assembly is connected with the outer cylinder, and the telescopic direction of the force balance assembly is parallel to the axis.
Preferably, the force balance assembly comprises a gas spring, one end of the gas spring is connected with the middle cylinder, the other end of the gas spring is connected with the outer cylinder, and the expansion direction of the gas spring is parallel to the axis.
Preferably, the force balance assembly is provided in plurality, and each force balance assembly is provided along the circumferential direction of the outer cylinder.
Preferably, the length of the inner tube is not greater than the length of the middle tube in the extending direction of the axis, and the length of the middle tube is not greater than the length of the outer tube.
Preferably, a handle is arranged at one end of the inner cylinder far away from the outer cylinder.
Preferably, the telescopic components comprise a plurality of groups, each group of telescopic components are arranged along a direction parallel to the axis, two adjacent groups of telescopic components are respectively a first telescopic component and a second telescopic component, the outer cylinder of the second telescopic component is a middle cylinder of the first telescopic component, and the middle cylinder of the second telescopic component is an inner cylinder of the first telescopic component.
A second aspect of the application provides a portable digital X-ray machine comprising a telescopic mechanism as claimed in any one of the preceding claims.
The technical scheme provided by the application can achieve the following beneficial effects:
the telescopic mechanism provided by the application is provided with the three-section structure of the outer cylinder, the middle cylinder and the inner cylinder, and two rollers are additionally arranged, the inner cylinder and the inner cylinder can be synchronously telescopic by pulling or pressing the inner cylinder, and as the three-section structure is adopted, when the required stroke is prolonged or shortened, the inner cylinder and the middle cylinder only need to be respectively prolonged or shortened by half of the required stroke, and the length of each cylinder in each section of the three-section structure can be shortened, so that the telescopic mechanism can ensure the requirement of the prolonged or shortened, and can reduce the whole height after the telescopic mechanism is folded, thereby occupying smaller space and being convenient to carry and transport.
The portable digital X-ray machine provided by the application adopts the telescopic mechanism, so that the travel of the combined machine head along the vertical direction is increased, and the overall height of the portable digital X-ray machine is reduced, thereby reducing the occupied space and being convenient to carry and transport. In addition, when the telescopic mechanism is adopted to extend or shorten the travel of the combined machine head along the vertical direction, the operation is simple, and great convenience is brought to operators.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
FIG. 1 is a schematic view of a telescopic mechanism according to an embodiment of the present application;
fig. 2 is a schematic structural view of another embodiment of the telescopic mechanism according to the present application.
Reference numerals:
10. 11-an outer cylinder;
101. a 111-transition piece;
20. 21-a middle cylinder;
30. 31-an inner cylinder;
40. 41-a first roller;
50. 51-a first flexible connection;
501. 511-a first end;
502. 512-second end;
60. 61-a second roller;
70. 71-a second flexible connection;
701. 711-third end;
702. 712-fourth end;
80-gas spring.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Detailed Description
The application will now be described in further detail with reference to specific examples thereof in connection with the accompanying drawings.
The embodiment of the application provides a telescopic mechanism which can be applied to mobile X-ray photographic equipment, portable digital X-ray machines and the like. As shown in fig. 1, the telescopic mechanism includes a telescopic assembly including an outer tub 10, a middle tub 20, an inner tub 30, a first roller 40, a second roller 60, a first flexible connection part 50, and a second flexible connection part 70.
The outer cylinder 10, the middle cylinder 20, and the inner cylinder 30 may be a cylindrical cylinder, a square cylinder, or other cylindrical structures. The middle cylinder 20 is slidably inserted into the outer cylinder 10 in a direction parallel to the axis thereof, and the inner cylinder 30 is slidably inserted into the middle cylinder 20 in a direction parallel to the axis, wherein the axis of relative sliding of the middle cylinder 20 and the outer cylinder 10 and the axis of relative sliding of the inner cylinder 30 with respect to the middle cylinder 20 may be collinear.
The first roller 40 and the second roller 60 are respectively connected to the middle cylinder 20 along a rotation axis perpendicular to the axis, the first flexible connection part 50 comprises a first end 501 and a second end 502, the first end 501 is fixed to the outer cylinder 10, and the second end 502 bypasses the first roller 40 and is fixed to the inner cylinder 30; the second flexible connection part 70 comprises a third end 701 and a fourth end 702, the third end 701 is fixed on the outer cylinder 10, and the fourth end 702 bypasses the second roller 60 and is fixed on the inner cylinder 30; and along the extending direction of the axis, the second end 502 and the fourth end 702 are located between the first roller 40 and the second roller 60, the first end 501 and the second end 502 are located on the same side of the first reference plane, the third end 701 and the fourth end 702 are located on the same side of the second reference plane, wherein the first reference plane passes through the rotating shaft of the first roller 40 and is perpendicular to the axis, and the second reference plane passes through the rotating shaft of the second roller 60 and is perpendicular to the axis.
In the above embodiment, the telescopic mechanism is provided with the three-section structure of the outer cylinder 10, the middle cylinder 20 and the inner cylinder 30, and the first roller 40 and the second roller 60 are added, when the inner cylinder 30 is pulled to move in the direction away from the middle cylinder 20, the first roller 40 is driven to move towards the inner cylinder 30 by the first flexible connection part 50, the middle cylinder 20 moves towards the direction away from the outer cylinder 10, and finally the moving distance of the inner cylinder 30 relative to the middle cylinder 20 is equal to the moving distance of the middle cylinder 20 relative to the outer cylinder 10, and the moving directions of the two are the same; similarly, when the inner cylinder 30 is pressed to move in a direction approaching the middle cylinder 20, the second flexible portion 70 drives the second roller 60 to move in a direction moving toward the inner cylinder 30, and the middle cylinder 20 moves in a direction approaching the outer cylinder 10, and finally the inner cylinder 30 moves in a distance equal to the distance of the middle cylinder 20 moving in a direction moving toward the outer cylinder 10, and the movement directions of the two are the same. From the above, the inner cylinder 30 is pulled or pressed to realize synchronous expansion of the middle cylinder 20 and the inner cylinder 30, and the expansion structure adopts a three-section structure, when the required length is elongated or shortened, the length of each cylinder in each section only needs to be elongated or shortened by half of the required length, and the length of each cylinder can be reduced compared with the length of each cylinder in two sections, therefore, the expansion mechanism can ensure the requirement of elongation or shortening, and after the expansion mechanism is folded, the whole length is reduced, and the occupied space is smaller.
Generally, the portions of the first flexible connection unit 50 not attached to the first roller 40 and the portions of the second flexible connection unit 70 not attached to the second roller 60 may be parallel to the axis or have a non-zero angle therebetween, and preferably are all parallel to the axis, so as to reduce the external force required by the telescopic mechanism during telescopic operation.
In order to increase the length of the extension while enabling the contracted size of the telescopic mechanism to be shortened, it is preferable that the first end 501 is located between the first roller 40 and the second roller 60. Generally, in order to better satisfy the above positional relationship and make the size of the telescopic mechanism smaller after folding, the first roller 40 is located on the side of the middle cylinder 20 near the bottom of the outer cylinder 10, the second roller 60 is located on the side of the middle cylinder 20 near the top of the inner cylinder 30, at this time, the first end 501 and the second end 502 are located on the side of the first reference plane near the top of the inner cylinder 30, and the third end 701 and the fourth end 702 are located on the side of the second reference plane near the bottom of the outer cylinder 10.
The second end 502 and the fourth end 702 may be connected to the same position of the inner cylinder 30 or different positions, and for convenience of processing and connection, it is preferable that the second end 502 and the fourth end 702 are connected to the same position of the inner cylinder 30, as shown in fig. 1, the connection manner may be welding, clamping, bonding, or the like.
The first end 501 may be attached to the bottom or other portion of the outer cartridge 10. When the first flexible connection part 50 is connected to other parts of the outer cylinder, such as the side wall, the middle cylinder 20 needs to be provided with a strip-shaped groove along the axial direction for passing through; when connected to the bottom of the outer barrel 10, it also typically includes a transition piece 101, one end of the transition piece 101 being connected to the bottom of the outer barrel 10 and the other end extending away from the top of the outer barrel 10; the first end 501 is connected to the end of the transition piece 101 away from the bottom of the outer cylinder 10, so that the middle cylinder 20 can be prevented from being provided with a bar-shaped groove, thereby increasing the strength of the middle cylinder 20 and increasing the convenience of connection.
Further, along the extending direction of the axis, the third end 701 may be located at any position of the outer barrel 10, such as the middle or the bottom, and when the third end 701 is located at the bottom of the outer barrel 10, the position of the second roller 60 may be set more flexibly, so as to reduce the length of the whole telescopic mechanism after being folded.
In the above embodiments, the rotation axis of the first roller 40 and the rotation axis of the second roller 60 may have any angle. As shown in fig. 1, the included angle between the rotation axis of the first roller 40 and the rotation axis of the second roller 60 is zero, that is, the two are parallel, so as to facilitate installation; the rotation axis of the first roller 40 may be perpendicular to or at an acute angle with respect to the rotation axis of the second roller 60.
Specifically, the outer peripheral surfaces of the first roller 40 or the second roller 60 may be cylindrical surfaces, such as a common bearing, or the first roller 40 or the second roller 60 may be a sprocket, or the outer peripheral surfaces of the first roller 40 and the second roller 60 may be cylindrical surfaces, or both may be sprockets.
Generally, when the outer circumferential surface of the first roller 40 is a cylindrical surface, the first flexible connection part 50 is preferably a wire rope; when the outer circumferential surface of the second roller 60 is a cylindrical surface, the second flexible connection part 70 is preferably a wire rope to increase the flexibility of the relative sliding among the inner cylinder 30, the middle cylinder 20 and the outer cylinder 10; and can satisfy certain intensity when less volume, and then guarantee flexible reliability. .
When the first roller 40 is a sprocket, the first flexible connection 50 is preferably a chain; when the second roller 60 is a sprocket, the second flexible connection part 70 is preferably a chain, and a driving structure can be added at this time, and the driving structure can drive the sprocket to rotate, so as to drive the inner cylinder 30 and the middle cylinder 20 to move relative to the outer cylinder 10. Optionally, the driving structure has a self-locking function, such as a self-locking motor, and the telescopic assembly can be self-locked through the driving structure.
In general, especially when the outer circumferential surfaces of the first roller 40 and the second roller 60 are cylindrical, the first roller 40 is provided with a limiting groove along the rotation direction thereof, and the portion of the first flexible connection portion 50 attached to the first roller 40 is located in the limiting groove, so as to prevent the first flexible connection portion 50 from being separated from the first roller 40 during the telescoping process of the telescoping mechanism. Or the first flexible connection unit 50 may be directly surface-bonded to the first roller 40.
Similarly, the second roller 60 is provided with a limiting groove along the rotation direction thereof, and the portion of the second flexible connection part 70 attached to the second roller 40 is located in the limiting groove, so as to prevent the second flexible connection part 70 from being separated from the second roller 60 in the telescoping process of the telescoping mechanism. Or the second flexible connection unit 70 may be directly surface-bonded to the second roller 60.
The relative sliding between the inner cylinder 30 and the middle cylinder 20, and the relative sliding between the middle cylinder 20 and the outer cylinder 10 may be independently realized by a slide rail, a linear motor, or other sliding mechanisms. In order to ensure the telescoping reliability of the telescoping mechanism, the telescoping assembly further comprises a sliding rail, wherein the sliding rail can be arranged between the inner cylinder 30 and the middle cylinder 20 and between the outer cylinder 10 and the middle cylinder 20, or only one of the positions is provided with the sliding rail. Preferably, the slide rail is provided at both positions. When the sliding rail is arranged between the inner cylinder 30 and the middle cylinder 20, the sliding rail can be arranged on the outer surface of the inner cylinder 30, and the middle cylinder 20 is slidably arranged on the sliding rail; the inner cylinder 30 may be provided on the inner surface of the middle cylinder 20, and the inner cylinder 30 may be slidably mounted on a slide rail. When the sliding rail is arranged between the middle cylinder 20 and the outer cylinder 10, the sliding rail can be arranged on the outer surface of the middle cylinder 20, and the outer cylinder 10 is slidably arranged on the sliding rail; the inner cylinder 20 may be provided on the inner surface of the outer cylinder 10, and the middle cylinder 20 may be slidably mounted on a slide rail. Generally, the inner surface of the outer cylinder 10, the inner surface and the outer surface of the middle cylinder 20 are respectively provided with a slide rail, the middle cylinder 20 is slidably mounted on the slide rail on the outer cylinder 10, and the inner cylinder 30 is slidably mounted on the slide rail on the middle cylinder 20.
Because the inner cylinder 30, the middle cylinder 20 move relative to the outer cylinder 10, the required pulling force or pressure is larger to overcome the gravity of the inner cylinder 30, the middle cylinder 20, in order to reduce the pulling force or pressure, the telescopic component further comprises a force balance component, one end of the force balance component is connected with the middle cylinder 20, the other end of the force balance component is connected with the outer cylinder 10, the telescopic direction of the force balance component is parallel to the axis, when the switch of the force balance component is opened, the force balance component can freely stretch and retract, and can provide supporting force to balance the gravity of the inner cylinder 30, the middle cylinder 20, so that external pulling force or pressure is reduced when stretching and retracting; when the switch of the force balance assembly is turned off, the force balance assembly can support the inner cylinder 30 and the middle cylinder 20, and at the moment, the force balance assembly cannot stretch and retract, so that the locking effect can be achieved, and misoperation of the inner cylinder 30 and the middle cylinder 20 relative to the outer cylinder 10 when the force balance assembly stretches to a required length is prevented.
Specifically, the force balance assembly may be a gas spring 80, as shown in fig. 1, one end of the gas spring 80 is connected to the middle cylinder 20, the other end is connected to the outer cylinder 10, and the expansion and contraction direction of the gas spring 80 is parallel to the axis. Alternatively, the force balancing component may be a spring balancer, and the specific connection mode may refer to the connection mode of the gas spring 80.
Regardless of the manner in which the force balance assembly is employed, for ease of operation, a switch of the force balance assembly is preferably provided on the top of the inner barrel 30 to operate the opening and closing of the force balance assembly simultaneously when the inner barrel 30 is pulled or depressed. Typically, the switch of the force balance assembly is a push button, which is continuously depressed (i.e., the switch is turned on) to unlock the force balance assembly, and simultaneously the inner cylinder 30 is pulled or depressed until the telescoping mechanism is retracted to the desired travel, and the push button is released (i.e., the switch is turned off) to lock the force balance assembly and not to retract. Of course, when the first roller 40 and the second roller 60 are sprockets and the driving structure has a self-locking function, the self-locking function of the driving structure needs to be unlocked in order to move the inner cylinder 30 and the middle cylinder 20 relative to the outer cylinder 10.
When the switch is disposed on the top of the inner barrel 30, optionally, the switch is controlled to unlock and lock by a transmission component and a force balance component, typically, the transmission component adopts a wire rope, the wire rope is tensioned when the switch is opened, and the wire rope is loosened when the switch is closed, thereby unlocking or locking the force balance component.
In this embodiment, one or more gas springs 80 may be provided, and when a plurality of gas springs are provided, each gas spring 80 is provided along the circumferential direction of the outer cylinder 10 to provide an even supporting force.
Generally, along the extending direction of the axis, the length of the inner cylinder 30 is not greater than the length of the middle cylinder 20, and the length of the middle cylinder 20 is not greater than the length of the outer cylinder 10, so that after the inner cylinder 30 and the middle cylinder 20 are both positioned in the outer cylinder 10 after being folded, and the carrying is further convenient. In general, for convenience of processing, the inner tube 30, the middle tube 20, and the outer tube 10 have equal lengths in the extending direction of the axis.
For convenience of telescopic operation, especially when the length of the inner cylinder 30 is not greater than that of the middle cylinder 20 and the length of the middle cylinder 20 is not greater than that of the outer cylinder 10, a handle is provided at one end of the inner cylinder 30 far from the outer cylinder 10, and the handle may be in a pull ring type, a pull rod type or other structures. In addition, a switch for controlling the force balance assembly is typically provided on the handle.
The telescoping assemblies of the above embodiments may be provided in one set (as shown in fig. 1) or in multiple sets.
When a plurality of groups are provided, such as two groups, three groups or more groups, the telescopic assemblies of each group are arranged along the direction parallel to the axis, and the two adjacent groups of telescopic assemblies are respectively a first telescopic assembly and a second telescopic assembly. Specifically, as shown in fig. 2, the first telescopic assembly includes an outer tub 10, a middle tub 20, an inner tub 30, a first roller 40, a second roller 60, a first flexible connection part 50, and a second flexible connection part 70; the second telescopic assembly includes the outer cylinder 11, the middle cylinder 21, the inner cylinder 31, the first roller 41, the second roller 61, the first flexible connection portion 51, and the second flexible connection portion 71. The outer cylinder 11 of the second telescopic assembly is the middle cylinder 20 of the first telescopic assembly, the middle cylinder 21 of the second telescopic assembly is the inner cylinder 30 of the first telescopic assembly, wherein in the second telescopic assembly, the first end 511 of the first flexible connection part 51 is fixed on the outer cylinder 11, the second end 512 bypasses the first roller 41 and is fixed on the inner cylinder 31, the third end 711 of the second flexible connection part 71 is fixed on the outer cylinder 11 (which can also be fixed on the outer cylinder 11 through the transition piece 111), and the fourth end 712 bypasses the second roller 61 and is fixed on the inner cylinder 31. Thereby realizing four-section telescopic machanism, being capable of further shortening the length of the telescopic machanism after being folded and reducing the volume thereof.
When multiple groups of telescopic components and force balancing components are provided, the force balancing components can be only arranged in one group of telescopic components on the outermost layer, as shown in fig. 2, so as to offset the whole weight; in this case, the switch of the force balance assembly is generally disposed at the top end of the inner cylinder of the innermost set of telescoping assemblies.
Another aspect of the present application also provides a portable digital X-ray machine comprising a telescopic mechanism as described in any of the embodiments above, to facilitate carrying and use of the portable digital X-ray machine.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The telescopic mechanism is characterized by comprising a telescopic component, wherein the telescopic component comprises an outer cylinder, a middle cylinder, an inner cylinder, a first roller, a second roller, a first flexible connecting part and a second flexible connecting part,
the middle cylinder is inserted into the outer cylinder in a sliding manner along the direction parallel to the axis of the middle cylinder; the inner cylinder is inserted into the middle cylinder in a sliding manner along the direction parallel to the axis;
the first roller and the second roller are respectively connected to the middle cylinder in a rotating way along a rotating shaft perpendicular to the axis, and the rotating shaft of the first roller is parallel to the rotating shaft of the second roller;
the first flexible connecting part comprises a first end and a second end, the first end is fixed on the outer cylinder, the second end bypasses the first roller and is fixed on the inner cylinder, and the first end is positioned between the first roller and the second roller; the second flexible connecting part comprises a third end and a fourth end, the third end is fixed on the outer cylinder, the fourth end bypasses the second roller and is fixed on the inner cylinder, and the third end is positioned at the bottom of the outer cylinder along the extending direction of the axis;
the second end and the fourth end are positioned between the first roller and the second roller along the extending direction of the axis, the first end and the second end are positioned on the same side of a first reference surface, the third end and the fourth end are positioned on the same side of a second reference surface, the first reference surface passes through the rotating shaft of the first roller and is perpendicular to the axis, and the second reference surface passes through the rotating shaft of the second roller and is perpendicular to the axis;
the telescopic mechanism further comprises a transition piece, one end of the transition piece is connected to the bottom of the outer cylinder, and the other end of the transition piece extends to the top far away from the outer cylinder; the first end is connected to an end of the transition piece remote from the bottom;
the telescopic component further comprises a force balance component, one end of the force balance component is connected with the middle cylinder, the other end of the force balance component is connected with the outer cylinder, and the telescopic direction of the force balance component is parallel to the axis;
the force balancing assembly includes a gas spring or a spring balancer.
2. The telescopic mechanism according to claim 1, wherein the first roller is provided with a limit groove along the rotation direction thereof, and the portion of the first flexible connection part attached to the first roller is located in the limit groove;
and/or
The second roller is provided with a limiting groove along the rotation direction of the second roller, and the part, attached to the second roller, of the second flexible connecting part is located in the limiting groove.
3. The telescoping mechanism of claim 1, wherein the telescoping assembly further comprises a slide rail,
the sliding rail is arranged between the outer cylinder and the middle cylinder, and the middle cylinder is slidably arranged on the outer cylinder through the sliding rail;
and/or
The sliding rail is arranged between the inner cylinder and the middle cylinder, and the inner cylinder is slidably mounted on the middle cylinder through the sliding rail.
4. The telescopic mechanism of claim 1, wherein an outer peripheral surface of at least one of the first roller and the second roller is cylindrical.
5. The telescopic mechanism according to claim 4, wherein the outer circumferential surface of the first roller is a cylindrical surface, and the first flexible connection part is a wire rope;
and/or
The outer peripheral surface of the second roller is a cylindrical surface, and the second flexible connecting part is a steel wire rope.
6. The telescopic mechanism according to claim 1, wherein a plurality of force balance assemblies are provided, each of the force balance assemblies being disposed along a circumferential direction of the outer cylinder.
7. The telescopic mechanism according to claim 1, wherein the length of the inner cylinder is not greater than the length of the middle cylinder in the direction of extension of the axis, and the length of the middle cylinder is not greater than the length of the outer cylinder.
8. The telescopic mechanism according to claim 1, wherein the end of the inner barrel remote from the outer barrel is provided with a handle.
9. The telescopic mechanism according to any one of claims 1-8, wherein the telescopic assemblies comprise a plurality of groups, each group of telescopic assemblies being arranged in a direction parallel to the axis, and two adjacent groups of telescopic assemblies being a first telescopic assembly and a second telescopic assembly, respectively, the outer cylinder of the second telescopic assembly being the middle cylinder of the first telescopic assembly, the middle cylinder of the second telescopic assembly being the inner cylinder of the first telescopic assembly.
10. A portable digital X-ray machine comprising a telescopic mechanism according to any of claims 1-9.
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| CN109626260B (en) * | 2018-12-18 | 2021-08-03 | 上海联影医疗科技股份有限公司 | Cross arm lifting assembly and movable radiation device |
| CN114366305B (en) * | 2022-01-11 | 2023-07-21 | 上海市胸科医院 | Telescoping device and medical robot |
| CN115007080B (en) * | 2022-06-28 | 2023-10-31 | 安徽省谱诺药化设备有限公司 | Stainless steel reaction kettle with lifting temperature-adjusting mechanism and installation method thereof |
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| CN106388844A (en) | 2017-02-15 |
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