WO2018032854A1 - 滚轮机构及具有其的空调器 - Google Patents

滚轮机构及具有其的空调器 Download PDF

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Publication number
WO2018032854A1
WO2018032854A1 PCT/CN2017/086090 CN2017086090W WO2018032854A1 WO 2018032854 A1 WO2018032854 A1 WO 2018032854A1 CN 2017086090 W CN2017086090 W CN 2017086090W WO 2018032854 A1 WO2018032854 A1 WO 2018032854A1
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WO
WIPO (PCT)
Prior art keywords
friction portion
drive shaft
roller mechanism
outer wheel
friction
Prior art date
Application number
PCT/CN2017/086090
Other languages
English (en)
French (fr)
Inventor
杜辉
雷新建
李子颀
Original Assignee
珠海格力电器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Priority to EP17840830.8A priority Critical patent/EP3499144B1/en
Priority to ES17840830T priority patent/ES2840175T3/es
Publication of WO2018032854A1 publication Critical patent/WO2018032854A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/30—Rope, cable, or chain drums or barrels
    • B66D1/34—Attachment of ropes or cables to drums or barrels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/02—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type
    • F16D7/021—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with radially applied torque-limiting friction surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
    • F24F2013/1446—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with gearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/247—Active noise-suppression

Definitions

  • the present invention relates to the field of refrigeration, and in particular to a roller mechanism and an air conditioner having the same.
  • the adjustable roller mechanism of the prior art can be used for a patio panel with a grill lift function.
  • the adjustable roller mechanism comprises an inner wheel and an outer wheel.
  • the inner circumference wall of the outer wheel is provided with an outer wheel caliper, and the inner wheel is provided with a plurality of elastic claws, and the grille is hung on the outer wall of the outer wheel by the rope and the fastener.
  • the cable is tightened at this time, the outer wheel bears a large pulling force, and is transmitted to the elastic claw through the outer wheel caliper, this force exceeds the elastic jaw receiving limit, causing The elastic jaws are contracted inwardly.
  • the main object of the present invention is to provide a roller mechanism and an air conditioner having the same, which solves the problem of large noise of the roller mechanism in the prior art.
  • a roller mechanism includes: a drive shaft; an outer wheel that is sleeved on the drive shaft; and a friction portion that is interposed between the drive shaft and the outer wheel, and the drive shaft passes the friction The part drives the outer wheel to rotate.
  • a receiving groove for accommodating the friction portion is provided on the drive shaft.
  • the driving shaft is provided with a protrusion
  • the friction portion is provided with a limiting groove that cooperates with the protrusion.
  • the friction portion extends in the circumferential direction of the drive shaft.
  • the friction portion is annular, and the drive shaft is provided with an annular receiving groove for accommodating the friction portion.
  • the longitudinal section of the friction portion is rectangular, circular, elliptical, trapezoidal, V-shaped or triangular.
  • the inner diameter of the outer wheel is smaller than the outer diameter of the friction portion in the free state.
  • the friction portion is made of an elastic material.
  • the friction portion is made of a rubber material.
  • the outer wall of the outer wheel is subjected to the load force G, the driving force of the drive shaft is N, the friction between the drive shaft and the friction portion is the first friction force f1, and the friction between the friction portion and the outer wheel is the second friction force.
  • N the driving force of the drive shaft
  • f1 the friction between the drive shaft and the friction portion
  • f2 the friction between the friction portion and the outer wheel
  • an air conditioner comprising: a grille; a roller mechanism coupled to the grille and driving the grille to move, the roller mechanism being the roller mechanism described above.
  • roller mechanisms there are a plurality of roller mechanisms.
  • the grille has a rectangular shape, and a plurality of roller mechanisms are disposed at the top corners of the grille.
  • the roller mechanism includes a friction portion that is interposed between the drive shaft and the outer wheel, and the drive shaft drives the outer wheel to rotate through the friction portion.
  • the drive shaft drives the friction portion to rotate, and the friction portion drives the outer wheel to rotate.
  • the friction portion rotates relative to the outer wheel.
  • the drive shaft rotates, the outer wheel does not rotate.
  • the above structure makes the outer wheel less susceptible to damage.
  • the technical solution of the embodiment is adopted, and the ratcheting structure is replaced by the friction structure.
  • the noise of the roller mechanism is reduced, the problem of the noise of the roller mechanism in the prior art is solved, and the user experience is improved.
  • the wear of the roller mechanism is reduced, so that the reliability of the roller mechanism is enhanced, and the life of the roller mechanism is improved.
  • Figure 1 is a perspective view showing a drive shaft of a first embodiment of a roller mechanism according to the present invention
  • Figure 2 is a perspective view showing the structure of the roller mechanism of Figure 1;
  • Fig. 3 is a schematic longitudinal sectional view showing the roller mechanism of Fig. 2.
  • the roller mechanism of the first embodiment includes a drive shaft 10, an outer wheel 20, and a friction portion 30.
  • the outer wheel 20 is sleeved on the drive shaft 10, and the friction portion 30 is interposed between the drive shaft 10 and the outer wheel 20.
  • the drive shaft 10 drives the outer wheel 20 to rotate by the friction portion.
  • the roller mechanism includes a friction portion 30 interposed between the drive shaft 10 and the outer wheel 20, and the drive shaft 10 drives the outer wheel 20 to rotate through the friction portion 30.
  • the drive shaft 10 drives the friction portion 30 to rotate, and the friction portion 30 drives the outer wheel 20 to rotate.
  • the friction portion 30 rotates relative to the outer wheel 20. At this time, although the drive shaft 10 continues to rotate, the outer wheel 20 is no longer rotated.
  • the above structure makes the outer wheel 20 less susceptible to damage.
  • the ratchet fastening structure is replaced by the friction structure, the noise of the roller mechanism is reduced on the one hand, the problem of large noise of the roller mechanism in the prior art is solved, and the user experience is improved. . On the other hand, the wear of the roller mechanism is reduced, so that the reliability of the roller mechanism is enhanced, and the life of the roller mechanism is improved.
  • the drive shaft 10 is provided with a receiving recess 11 for accommodating the friction portion 30.
  • the above structure enables the friction portion 30 to be always in the working position without being swayed in the axial direction of the drive shaft 10, thereby ensuring the operational stability of the roller mechanism.
  • the receiving groove for accommodating the friction portion 30 does not necessarily have a groove on the driving shaft 10, and it is also possible to provide two limiting protrusions on the driving shaft 10, and the friction portion 30 Located between the two limiting projections so that the friction portion 30 does not sway in the axial direction of the drive shaft 10.
  • the friction portion 30 extends in the circumferential direction of the drive shaft.
  • the above structure is simple and easy to install.
  • the friction portion 30 is annular, and the drive shaft 10 is provided with an annular receiving groove for accommodating the friction portion 30.
  • the above structure is convenient for the worker to install the friction portion, and is sleeved in the annular receiving groove. Moreover, the above structure is convenient for processing and production.
  • the longitudinal section of the friction portion 30 is rectangular, circular, elliptical, trapezoidal, V-shaped or triangular.
  • the specific shape of the longitudinal section of the friction portion 30 can be set according to actual conditions. Of course, those skilled in the art will appreciate that the longitudinal section of the friction portion 30 can also be other shapes than those listed above.
  • the longitudinal section of the friction portion 30 is rectangular. The above structure allows the friction portion 30 to sufficiently contact the drive shaft 10 and the outer wheel 20 to ensure a predetermined frictional force between the friction portion 30 and the drive shaft 10 and the outer wheel 20. Moreover, the above structure is simple to process and easy to implement.
  • the inner diameter of the outer ring 20 is smaller than the outer diameter of the friction portion 30 in the free state.
  • the friction portion 30 can be nested in the annular groove, and then the drive shaft 10 and the friction portion 30 are simultaneously inserted into the outer wheel 20.
  • the friction portion 30 and the annular groove of the drive shaft 10 should be tightly fitted, and the inner diameter of the outer wheel 20 should be slightly smaller than the outer diameter of the friction portion 30 in the natural state. In this way, the friction portion 30 is in a slightly compressed state when the roller mechanism is assembled.
  • the friction portion is made of a rubber material.
  • the rubber material has a small coefficient of friction and produces low noise.
  • the material of the friction portion is not limited thereto, and may also be made of other elastic materials having a small coefficient of friction.
  • the drive shaft 10 and the outer wheel 20 may be made of plastic material or other hard materials.
  • the outer wall of the outer wheel 20 is subjected to the load force G, the driving force of the drive shaft 10 is N, and the friction between the drive shaft 10 and the friction portion 30 is the first friction force f 1 , and the friction portion is The friction between the outer wheels 20 is a second friction force f 2 , where N>f 1 > f 2 , when G ⁇ f 2 , the outer wheel 20 rotates with the drive shaft 10, and when G>f 2 , the outer wheel 20 stops rotating. .
  • the above-described configuration when operating the roller mechanism, since the driving force of the driving shaft 10 is larger than the first N frictional force f 1, 30 can drive the drive shaft 10 so rotational friction portion.
  • the drive shaft 10 can drive the outer wheel 20 to rotate.
  • the load force G is greater than the second friction force f 2 (for example, the outer wheel 20 is subjected to a force of the load force N)
  • the friction portion 30 can rotate relative to the outer wheel 20.
  • the drive shaft 10 continues to rotate, the outer wheel 20 is no longer rotated.
  • the above structure makes the outer wheel 20 less susceptible to damage.
  • the roller mechanism (not shown) of the second embodiment differs from the first embodiment in the specific structure of the drive shaft 10 and the friction portion 30.
  • the driving shaft 10 is provided with a protrusion
  • the friction portion 30 is provided with a limiting groove that cooperates with the protrusion.
  • an air conditioner (not shown), the air conditioner according to the present application comprising a grille and a roller mechanism.
  • the roller mechanism is connected with the grille and drives the grille to move, and the roller mechanism is the above-mentioned roller mechanism. Since the above-described roller mechanism has an advantage of low noise, the air conditioner having the above-described roller mechanism also has the above advantages.
  • the grille is connected to the roller mechanism by a sling, one end of the sling is connected to the grille, and the other end of the sling is press-fixed to the outer wheel 20 by a screw, and the drive shaft 10 is driven to rotate by the motor.
  • the friction portion 30 Since the friction portion 30 is in a pressed state in the roller mechanism, there is a frictional force between the inner side of the friction portion 30 and the drive shaft 10, that is, the first frictional force f1 described above.
  • the load force of the outer wheel 20 is equal to the gravity G of the grid, and the torque of the motor received by the drive shaft 10 is N. In the present embodiment, N>f1>f2>G should be satisfied.
  • the drive shaft 10 drives the friction portion 30, and the friction portion 30 drives the outer wheel 20 to rotate against the load, and the grille moves up and down accordingly.
  • the above structure makes the lifting of the grille more stable, on the other hand, the load force on the sling is reduced, so that the sling is less likely to be broken, and the reliability of the use of the air conditioner is improved.
  • the grille has a rectangular shape, and a plurality of roller mechanisms are disposed at the top corners of the grille.
  • the above structure further makes the lifting of the grille smoother.
  • the application of the above-described roller mechanism can improve the phenomenon that the grille does not appear horizontally during lifting. Specifically, if the grille does not appear horizontal during lifting, when the grill portion at the higher end rises to the final position, it will withstand the main frame of the air conditioner. At this time, the load force applied to the grill portion at the higher end becomes large, and when the magnitude of the load force reaches a predetermined value (for example, the magnitude of the load force is the torque N of the motor), the drive shaft 10 is still driven to rotate by the motor.
  • a predetermined value for example, the magnitude of the load force is the torque N of the motor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transmission Devices (AREA)
  • Friction Gearing (AREA)

Abstract

一种滚轮机构及具有其的空调器，其中滚轮机构包括：驱动轴（10）；外轮（20），套设在驱动轴（10）上；摩擦部（30），夹设在驱动轴（10）和外轮（20）之间，驱动轴（10）通过摩擦部（30）驱动外轮（20）转动。该滚轮机构解决了噪音大的问题。

Description

滚轮机构及具有其的空调器 技术领域
本发明涉及制冷领域，具体而言，涉及一种滚轮机构及具有其的空调器。
背景技术
现有技术中的可调节的滚轮机构可用于带格栅升降功能的天井机面板。这种可调节的滚轮机构包括内轮和外轮，外轮的内周壁上设置有外轮卡尺，内轮上设置有多个弹性卡爪，格栅通过绳索以及紧固件挂在外轮的外壁上。当格栅上升到规定高度被阻挡不能再继续上升时，此时线缆被拉紧，外轮承担较大的拉力，并通过外轮卡尺传递给弹性卡爪，这个力超出弹性卡爪承受限度，引起弹性卡爪向内收缩变形。若内轮继续转动，会使得弹性卡爪在外轮卡尺上打滑跳动，外轮不会继续转动。上述结构一方面使得外轮不易损坏失灵，另一方面使得牵引线不易断裂。但此种机构仍存在一定的不足之处，具体为以下两点：
第一、由于弹性卡爪可能会在外轮卡尺上打滑跳动，因此会产生较大的噪声，使得用户的使用感受差。
第二、由于弹性卡爪会经常向内收缩变形，并在外轮卡尺上打滑跳动，因此使得弹性卡爪产生疲劳失效的几率增加，从而减小了机构的寿命。
发明内容
本发明的主要目的在于提供一种滚轮机构及具有其的空调器，以解决现有技术中的滚轮机构噪声大的问题。
为了实现上述目的，根据本发明的一个方面，提供了一种滚轮机构，包括：驱动轴；外轮，套设在驱动轴上；摩擦部，夹设在驱动轴与外轮之间，驱动轴通过摩擦部驱动外轮转动。
进一步地，驱动轴上设置有用于容纳摩擦部的容纳凹槽。
进一步地，驱动轴上设置有凸起，摩擦部上设置有与凸起配合的限位凹槽。
进一步地，摩擦部沿驱动轴的周向延伸。
进一步地，摩擦部为环形，驱动轴上设置有用于容纳摩擦部的环形容纳凹槽。
进一步地，摩擦部的纵断面为矩形、圆形、椭圆形、梯形、V形或三角形。
进一步地，外轮的内径小于摩擦部在自由状态下的外径。
进一步地，摩擦部由弹性材料制成。
进一步地，摩擦部由橡胶材料制成。
进一步地，外轮的外壁受到负载力G，驱动轴的驱动力为N，驱动轴与摩擦部之间的摩擦力为第一摩擦力f1，摩擦部与外轮之间的摩擦力为第二摩擦力f2，其中N>f1>f2，当G<f2时，外轮随驱动轴转动，当G>f2时，外轮停止转动。
根据本发明的另一方面，提供了一种空调器，包括：格栅；滚轮机构，与格栅连接并驱动格栅移动，滚轮机构为上述的滚轮机构。
进一步地，滚轮机构为多个。
进一步地，格栅呈矩形，多个滚轮机构布置在格栅的顶角处。
应用本发明的技术方案，滚轮机构包括摩擦部，摩擦部夹设在驱动轴与外轮之间，驱动轴通过摩擦部驱动外轮转动。当滚轮机构工作时，驱动轴驱动摩擦部转动，摩擦部驱动外轮转动。当外轮受到的负载力的大小大于外轮与摩擦部之间的摩擦力时，摩擦部与外轮相对转动。此时，虽然驱动轴转动，但是外轮不再转动。上述结构使得外轮不易损坏失灵。另外，应用本实施例的技术方案，通过摩擦结构代替棘轮卡接结构，一方面减小了滚轮机构的噪声，解决了现有技术中的滚轮机构噪声大的问题，改善了用户的使用感受。另一方面减小了滚轮机构的磨损，使得滚轮机构的可靠性增强，提高了滚轮机构的寿命。
附图说明
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1示出了根据本发明的滚轮机构的实施例一的驱动轴的立体示意图；
图2示出了图1的滚轮机构的立体结构示意图；以及
图3示出了图2的滚轮机构的纵剖结构示意图。
其中，上述附图包括以下附图标记：
10、驱动轴；11、容纳凹槽；20、外轮；30、摩擦部。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
如图1至图3所示，实施例一的滚轮机构包括驱动轴10、外轮20以及摩擦部30。其中，外轮20套设在驱动轴10上，摩擦部30夹设在驱动轴10与外轮20之间，驱动轴10通过摩擦部驱动外轮20转动。
应用实施例一的技术方案，滚轮机构包括摩擦部30，摩擦部30夹设在驱动轴10与外轮20之间，驱动轴10通过摩擦部30驱动外轮20转动。当滚轮机构工作时，驱动轴10驱动摩擦部30转动，摩擦部30驱动外轮20转动。当外轮20受到的负载力的大小大于外轮20与摩擦部30之间的摩擦力时，摩擦部30与外轮20相对转动。此时，虽然驱动轴10继续转动，但是外轮20不再转动。上述结构使得外轮20不易损坏失灵。另外，应用本实施例的技术方案，通过摩擦结构代替了棘轮卡接结构，一方面减小了滚轮机构的噪声，解决了现有技术中的滚轮机构噪声大的问题，改善了用户的使用感受。另一方面减小了滚轮机构的磨损，使得滚轮机构的可靠性增强，提高了滚轮机构的寿命。
如图1和图3所示，在实施例一中，驱动轴10上设置有用于容纳摩擦部30的容纳凹槽11。上述结构使得摩擦部30能够始终处于工作位置上，不会沿驱动轴10的轴向窜动，从而保证了滚轮机构的工作稳定性。当然，本领域技术人员应当知晓，上述容纳摩擦部30的容纳凹槽不一定是在驱动轴10上开设凹槽，还有可能是在驱动轴10上设置两个限位凸起，摩擦部30位于两个限位凸起之间，以使摩擦部30不会沿驱动轴10的轴向窜动。
如图3所示，在实施例一中，摩擦部30沿驱动轴的周向延伸。上述结构简单易于安装。
如图3所示，在实施例一中，摩擦部30为环形，驱动轴10上设置有用于容纳摩擦部30的环形容纳凹槽。上述结构方便工人对摩擦部进行安装，套设在环形容纳凹槽内即可。而且上述结构方便加工和生产。
如图3所示，在实施例一中，摩擦部30的纵断面为矩形、圆形、椭圆形、梯形、V形或三角形。摩擦部30的纵断面的具体形状可以根据实际情况进行设置。当然，本领域技术人员应当知道，摩擦部30的纵断面还可以为上述所列出的形状以外的其他形状。优选地，在本实施例中，摩擦部30的纵断面为矩形。上述结构使得摩擦部30够与驱动轴10和外轮20充分接触，保证摩擦部30与驱动轴10和外轮20之间具有预定的摩擦力。而且上述结构加工简单、易于实现。
在实施例一中，外轮20的内径小于摩擦部30在自由状态下的外径。上述结构能够保证摩擦部30与驱动轴10之间具有预定的第一摩擦力，以及保证摩擦部30与外轮20之间具有预定的第二摩擦力。
下面简单叙述一下安装过程：
由于上述驱动轴10的侧面具有环形凹槽，因此可以将摩擦部30嵌套在环形凹槽中，然后再将驱动轴10和摩擦部30一并塞入外轮20中。其中，摩擦部30与驱动轴10的环形凹槽之间应紧密配合，同时外轮20的内径应略微小于摩擦部30在自然状态下的外径。这样一来，当滚轮机构组装完后摩擦部30就处于略微压缩的状态。
由于摩擦材料的摩擦系数越低，越易产生噪音。因此，在本实施例中，摩擦部由橡胶材料制成。橡胶材料的摩擦系数小，产生的噪音也小。当然，本领域技术人员应当知道，摩擦部的材料不限于此，还可以由其他摩擦系数较小的弹性材料制成。
需要说明的是，由于摩擦部30采用了带有弹性的材质，且动作为摩擦滑动，因此声响会明显小于现有技术中的棘轮弹动的声音，且避免了棘轮机构中弹性体疲劳变形失效的情况。
还需要说明的是，在本实施例中，驱动轴10和外轮20可使用塑料材质或其他硬材质。
具体地，在实施例一中，外轮20的外壁受到负载力G，驱动轴10的驱动力为N，驱动轴10与摩擦部30之间的摩擦力为第一摩擦力f1，摩擦部与外轮20之间的摩擦力为第二摩擦力f2，其中N>f1>f2，当G<f2时，外轮20随驱动轴10转动，当G>f2时，外轮20停止转动。上述结构使得当滚轮机构工作时，由于驱动轴10的驱动力N大于第一摩擦力f1，因此驱动轴10能够驱动摩擦部30转动。又由于负载力G小于第二摩擦力f2，因此驱动轴10能够驱动外轮20转动。而当负载力G大于第二摩擦力f2(比如外轮20受到负载力大小为N的力)时，摩擦部30能够与外轮20相对转动。此时，虽然驱动轴10继续转动，但是外轮20不再转动。上述结构使得外轮20不易损坏失灵。
实施例二的滚轮机构(图中未示出)与实施例一的区别在于驱动轴10和摩擦部30的具体结构。具体地，在实施例二中，驱动轴10上设置有凸起，摩擦部30上设置有与凸起配合的限位凹槽。上述结构使得摩擦部30能够始终处于工作位置上，不会沿驱动轴10的轴向窜动，从而保证了滚轮机构的工作稳定性。
在本申请中，还提供了一种空调器(图中未示出)，根据本申请的空调器包括格栅以及滚轮机构。其中，滚轮机构，与格栅连接并驱动格栅移动，滚轮机构为上述的滚轮机构。由于上述的滚轮机构具有噪音小的优点，因此，具有上述滚轮机构的空调器也具有上述优点。
具体地，格栅通过吊绳与滚轮机构连接，吊绳的一端与格栅连接，吊绳的另一端用螺钉压紧固定在外轮20上，驱动轴10受电机驱动而转动。由于摩擦部30在滚轮机构中处于被压紧的状态，所述摩擦部30的内侧与驱动轴10之间存在摩擦力，即上述的第一摩擦力f1。摩擦部30与外轮20之间存在摩擦力，即上述的第二摩擦力f2。外轮20承受的负载力等于格栅的重力G，驱动轴10受到的电机扭力为N。在本实施例中应当满足N>f1>f2>G。
当电机带动驱动轴10时，驱动轴10带动摩擦部30、摩擦部30再带动外轮20克服负载进行转动，格栅随之做出升降动作。
在本实施例中，滚轮机构为多个。上述结构一方面使得格栅的升降更加平稳，另一方面降低了吊绳所受的负载力，使得吊绳更加不容易断裂，提高了空调器的使用可靠性。
在本实施例中，格栅呈矩形，多个滚轮机构布置在格栅的顶角处。上述结构进一步使得格栅的升降更加平稳。此外，应用上述的滚轮机构能够改善格栅在升降中出现不水平的现象。具体地，如果格栅在升降中出现不水平的现象，当处于较高端的格栅部分升至最终位置时，将会顶住空调器的主体框架。此时，处于较高端的格栅部分受到的负载力变大，当负载力的大小到达预定值时(如负载力的大小为电机的扭力N)，驱动轴10仍受电机驱动旋转。因摩擦部30与外轮20之间摩擦力相对于负载力来说较小，因此二者间发生相对滑动。外轮20不再受到驱动。而其他位置的滚轮机构会继续带动格栅对应点上升，如此可实现格栅的调平。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (13)

  1. 一种滚轮机构，其特征在于，包括：
    驱动轴(10)；
    外轮(20)，套设在所述驱动轴(10)上；
    摩擦部(30)，夹设在所述驱动轴(10)与所述外轮(20)之间，所述驱动轴(10)通过所述摩擦部(30)驱动所述外轮(20)转动。
  2. 根据权利要求1所述的滚轮机构，其特征在于，所述驱动轴(10)上设置有用于容纳所述摩擦部(30)的容纳凹槽(11)。
  3. 根据权利要求1所述的滚轮机构，其特征在于，所述驱动轴(10)上设置有凸起，所述摩擦部(30)上设置有与所述凸起配合的限位凹槽。
  4. 根据权利要求1所述的滚轮机构，其特征在于，所述摩擦部(30)沿所述驱动轴(10)的周向延伸。
  5. 根据权利要求4所述的滚轮机构，其特征在于，所述摩擦部(30)为环形，所述驱动轴(10)上设置有用于容纳所述摩擦部(30)的环形容纳凹槽。
  6. 根据权利要求4所述的滚轮机构，其特征在于，所述摩擦部(30)的纵断面为矩形、圆形、椭圆形、梯形、V形或三角形。
  7. 根据权利要求1所述的滚轮机构，其特征在于，所述外轮(20)的内径小于所述摩擦部(30)在自由状态下的外径。
  8. 根据权利要求1所述的滚轮机构，其特征在于，所述摩擦部(30)由弹性材料制成。
  9. 根据权利要求1所述的滚轮机构，其特征在于，所述摩擦部(30)由橡胶材料制成。
  10. 根据权利要求1至9中任一项所述的滚轮机构，其特征在于，所述外轮(20)的外壁受到负载力G，所述驱动轴(10)的驱动力为N，所述驱动轴(10)与所述摩擦部(30)之间的摩擦力为第一摩擦力f1，所述摩擦部(30)与所述外轮(20)之间的摩擦力为第二摩擦力f2，其中N>f1>f2，当G<f2时，所述外轮(20)随所述驱动轴(10)转动，当G>f2时，所述外轮(20)停止转动。
  11. 一种空调器，包括：
    格栅；
    滚轮机构，与所述格栅连接并驱动所述格栅移动，
    其特征在于，
    所述滚轮机构为权利要求1至10中任一项所述的滚轮机构。
  12. 根据权利要求11所述的空调器，其特征在于，所述滚轮机构为多个。
  13. 根据权利要求12所述的空调器，其特征在于，所述格栅呈矩形，多个所述滚轮机构布置在所述格栅的顶角处。
PCT/CN2017/086090 2016-08-15 2017-05-26 滚轮机构及具有其的空调器 WO2018032854A1 (zh)

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