阅读说明：本技术 一种隐藏式手轮装置 (Hidden hand wheel device ) 是由 白畇 范瑞杰 张垠博 蒋俊 冯志祥 董大勇 于 2020-11-17 设计创作，主要内容包括：本发明涉及一种隐藏式手轮装置,其包括外壳、手轮、手轮支架、限位架及限位机构等。外壳具有内腔,并在顶壁形成有第一开口。手轮可转动固定在手轮支架上,并能够一同经由第一开口进出内腔,手轮支架包括设置在手轮支架中并能够抵接底壁的弹性构件。限位架沿隐藏式手轮装置的横向移动固定在手轮支架的外侧或侧壁的内侧上,并且限位架的背侧设有用于驱动其横向移动的驱动机构。限位机构固定在限位架的横向相对侧,并且被构造成能够在抵接限位架的纵向端面而将限位架锁定在收回位置。当手轮处于收回位置时,弹性构件处于受压状态。(The invention relates to a hidden hand wheel device which comprises a shell, a hand wheel support, a limiting frame, a limiting mechanism and the like. The housing has an interior cavity and is formed with a first opening in a top wall. The hand wheel is rotatable to be fixed on the hand wheel support to can together pass through first opening business turn over inner chamber, the hand wheel support is including setting up in the hand wheel support and can the elastic component of butt diapire. The limiting frame is fixed on the outer side of the hand wheel support or the inner side of the side wall along the transverse movement of the hidden hand wheel device, and a driving mechanism for driving the limiting frame to transversely move is arranged on the back side of the limiting frame. The spacing mechanism is fixed on the transverse opposite sides of the spacing frame and is configured to abut against the longitudinal end surface of the spacing frame to lock the spacing frame at the retraction position. When the hand wheel is in the retracted position, the elastic member is in a compressed state.)

1. a hidden hand wheel device for controlling a direction of travel of a piece of transportation equipment, the hidden hand wheel device comprising:

a housing including a top wall, a bottom wall, and a side wall connecting the top wall and the bottom wall, the top wall, the bottom wall, and the side wall defining an interior cavity, the top wall formed with a first opening;

a hand wheel movable out of the interior cavity of the housing via the first opening and configured to be movable between a retracted position received in the interior cavity and an operating position outside the housing for manipulating traffic equipment;

the hand wheel support is fixed in the inner cavity in a lifting manner, and a hand wheel is rotatably attached to the hand wheel support, wherein the hand wheel support comprises an elastic component which is arranged in the hand wheel support and can abut against the bottom wall;

the limiting frame is fixed on the outer side of the hand wheel support or the inner side of the side wall along the transverse movement of the hidden hand wheel device, and a driving mechanism for driving the limiting frame to transversely move is arranged on the back side of the limiting frame; and

the limiting mechanism is fixed in the hidden hand wheel device and transversely opposite to the limiting frame, so that the limiting mechanism can be abutted against the longitudinal end surface of the limiting frame to lock the limiting frame at a retraction position,

wherein the resilient member is in a compressed state when the hand wheel is in a retracted position.

2. The hidden hand wheel device of claim 1, wherein the stop bracket is a first stop bracket movably secured to a hand wheel bracket, and the drive mechanism comprises a lower spring secured to the hand wheel bracket and an electromagnetic element, wherein the lower spring is compressively abutted against the first stop bracket and the hand wheel bracket, respectively, such that the first stop bracket moves laterally outward to abut the stop mechanism, and the electromagnetic element is configured to actuate the first stop bracket to move laterally out of abutment with the stop mechanism.

3. The hidden hand wheel device as claimed in claim 2, wherein the wall of the hand wheel bracket is provided with a limiting cavity capable of accommodating one lateral end of the first limiting frame.

4. The concealed hand wheel device according to claim 3, wherein the lateral end of the first stopper frame is formed as a flange, and a stopper step for limiting a lateral movement range of the first stopper frame is formed on a wall surface of the stopper cavity.

5. The concealed hand wheel device of claim 2, wherein the limiting mechanism comprises a second limiting frame fixed on the housing in a laterally movable manner, wherein the side wall is provided with a supporting step for supporting the second limiting frame.

6. The hidden hand wheel device of claim 5, wherein the top wall of the housing is formed with a first stop wall extending toward the bottom wall of the housing, and the stop mechanism further comprises an upper elastic member forcibly abutting against the inner wall surface of the side wall and the second stop to make the second stop fit against the first stop wall.

7. The hidden hand wheel device of claim 6, wherein the second retention bracket is an L-shaped bracket having a second transverse arm extending transversely and configured to abut the first retention bracket.

8. The hidden hand wheel device of claim 5, wherein the top wall is formed with a second opening that fits the top of the second retainer such that the second retainer can move laterally in the second opening out of abutment with the first retainer.

9. The hidden hand wheel device of claim 8, wherein the second stopper protrudes laterally outward from the outer wall surface near the top to form a stop; and the inner surface of the side wall of the shell is provided with a groove matched with the shape of the blocking part.

10. The hidden hand wheel apparatus of claim 9, wherein the stop is formed with an inwardly recessed dust groove in a surface facing the top wall of the housing.

11. The hidden hand wheel device as claimed in claim 2 or 8, wherein the first retainer is formed with a vertical arm extending vertically, the upper end of the vertical arm is formed with a first buckling portion extending laterally and inwardly,

the top wall of the housing is formed with a second limit wall extending toward the bottom wall of the housing, and the second limit wall is provided with a second catch portion protruding laterally outward and engageable with the first catch, the hand wheel being held in the operating position when the second catch portion is engaged with the first catch portion.

12. The hidden hand wheel device of claim 11, wherein when the hidden hand wheel device includes a second retainer, the end surface of the second transverse arm of the second retainer is formed as a second inclined surface that is inclined toward the laterally inner side in the vertically downward direction, and the upright arm of the first retainer has a first inclined surface that mates with the second inclined surface.

13. The hidden hand wheel apparatus of claim 1, wherein an upper end surface of the bottom wall of the housing is formed with a first annular groove for receiving the resilient member.

14. The hidden hand wheel device of claim 1 or 13, wherein the interior of the hand wheel bracket is formed with a cylindrical cavity configured to receive the resilient member.

15. The hidden hand wheel device of claim 1, wherein the hand wheel includes a grip portion for gripping by a driver and a cylindrical portion located below the grip portion.

16. The hidden hand wheel device of claim 15, wherein a top portion of the hand wheel bracket is formed with a cylindrical portion insertable into the cylindrical portion, the cylindrical portion and the cylindrical portion being configured to secure a bearing therebetween.

17. The hidden hand wheel device of claim 1, wherein the stop mechanism is formed as a stop boss protruding from an inner surface of the sidewall, the stop bracket being movably secured to the hand wheel bracket.

18. The hidden hand wheel device of claim 1, wherein the stop mechanism is formed as a stop boss protruding from an outer surface of the hand wheel bracket, the stop bracket being movably secured to an inner surface of the sidewall.

19. The recessed hand wheel device of any one of claims 1-10, 12, 13, wherein the recessed hand wheel device comprises a plurality of retention shelves, wherein the retention shelves are evenly arranged along a circumference of the recessed hand wheel device.

Technical Field

The invention relates to the field of airplane mechanical equipment, in particular to a hidden hand wheel device.

Background

Aircraft are often provided with a turning hand wheel for controlling the steering of the wheels of the aircraft. A conventional turning hand wheel is basically a steering handle which is pivotally connected to a base which is fixed to a console near the side bars of the cockpit. The pilot directly controls the deflection direction of the airplane when the airplane glides on the ground by rotating the hand wheel handle. The conventional turning hand wheel control process is: the driver firstly presses a hand wheel handle, the standby switch is switched on, then a front wheel turning hand wheel is rotated, the inner device of the hand wheel converts the rotation angle of the hand wheel into an angle signal and transmits the angle signal to a monitoring channel of a turning control assembly SCU, and then the angle of an airplane wheel is controlled. Typically, the front wheel position feedback signals are provided by two turn position feedback sensors mounted within the turn actuators, the feedback signals provided by the two turn position feedback sensors entering the supervisory and control channels of the turn control assembly SCU, respectively. Through the logical operation of the turning control assembly SCU, the on-off of an enable valve in the turning control valve and the input current of an electro-hydraulic servo valve are controlled, so that the oil flowing into the turning actuator cylinder is controlled, and the turning function of the hand wheel is realized.

Generally, the turning hand wheel is typically used only when the ground is coasting. When the steering handwheel is mainly used for an airplane operated by an intercontinental route, the use time of the steering handwheel is extremely low, and the steering handwheel exposed on the surface of a cockpit of the cockpit not only influences the cleanness and the attractiveness of the cockpit, but also occupies a certain space of the cockpit.

Disclosure of Invention

In view of the above-mentioned situation of the turning handwheel according to the prior art, it is an object of the present invention to provide a hidden handwheel device which can be retrieved for use in a use state.

This object is achieved by the invention of a hidden hand wheel arrangement of the following form. The hidden hand wheel device for controlling the traveling direction of the traffic equipment comprises a shell, a hand wheel support, a limiting frame and a limiting mechanism. Wherein the housing includes a top wall, a bottom wall, and a side wall connecting the top wall and the bottom wall, the top wall, the bottom wall, and the side wall defining an interior cavity, the top wall formed with a first opening. The hand wheel is movable out of the interior cavity of the housing via the first opening and is configured to be movable between a retracted position received in the interior cavity and an operating position outside the housing for manipulating traffic equipment. The hand wheel support is fixed with liftable in the inner chamber, the hand wheel rotationally attaches on the hand wheel support, wherein, the hand wheel support is including setting up in the hand wheel support and can the butt the elastic component of diapire. The limiting frame is fixed on the outer side of the hand wheel support or the inner side of the side wall along the transverse movement of the hidden hand wheel device, and a driving mechanism for driving the limiting frame to transversely move is arranged on the back side of the limiting frame. The spacing mechanism is fixed on the transverse opposite sides of the spacing frame and is configured to abut against the longitudinal end surface of the spacing frame to lock the spacing frame at the retraction position. When the hand wheel is in the retracted position, the elastic member is in a compressed state.

When a hand wheel support below the hand wheel is locked through the matching of the limiting frame and the limiting mechanism, the hand wheel is locked at a retraction position, and the elastic component is in a pressed state; when the limiting frame and the limiting mechanism are separated from each other and abutted, the pressed elastic component naturally recovers to push the hand wheel out of the inner cavity of the shell. The driver may then operate the hand wheel.

According to a preferred embodiment of the present invention, the limiting frame is a first limiting frame movably fixed on a hand wheel support, the driving mechanism includes a lower elastic member fixed on the hand wheel support and an electromagnetic member, wherein the lower elastic member is pressed to abut against the first limiting frame and the hand wheel support respectively so that the first limiting frame moves laterally outwards to abut against the limiting mechanism, and the electromagnetic member is configured to drive the first limiting frame to move laterally to disengage from the abutting against the limiting mechanism.

According to a preferred embodiment of the present invention, the wall surface of the hand wheel support is provided with a limiting cavity capable of accommodating one lateral end of the first limiting frame.

According to a preferred embodiment of the present invention, the lateral end of the first stopper frame is formed as a flange, and a stopper step for limiting a lateral movement range of the first stopper frame is formed on a wall surface of the stopper cavity.

According to a preferred embodiment of the present invention, the spacing mechanism comprises a second spacing frame fixed on the housing movably in the lateral direction, wherein the side wall is provided with a supporting step for supporting the second spacing frame.

According to a preferred embodiment of the present invention, the top wall of the housing is formed with a first stopper wall extending toward the bottom wall of the housing, and the stopper mechanism further includes an upper elastic member forcibly abutting against the inner wall surface of the housing and the second stopper frame to make the second stopper frame fit against the first stopper wall.

According to a preferred embodiment of the invention, the second retention frame is an L-shaped bracket having a second transverse arm extending transversely and adapted to abut the first retention frame.

According to a preferred embodiment of the present invention, the top wall is formed with a second opening adapted to a top of the second restraint frame, such that the second restraint frame can move laterally in the second opening to disengage from abutment with the first restraint frame.

According to a preferred embodiment of the present invention, the second stopper is formed by protruding outward in a lateral direction from an outer wall surface of the second stopper near the top portion; and the inner surface of the side wall of the shell is provided with a groove matched with the shape of the blocking part.

According to a preferred embodiment of the present invention, the blocking portion is formed with an inwardly depressed dust-proof groove at a surface facing the top wall of the housing.

According to a preferred embodiment of the present invention, the first position-limiting frame is formed with a vertical arm extending vertically, the upper end of the vertical arm is formed with a first buckling part extending laterally and inwardly,

the top wall of the housing is formed with a second limit wall extending toward the bottom wall of the housing, and the second limit wall is provided with a second catch portion protruding laterally outward and engageable with the first catch, the hand wheel being held in the operating position when the second catch portion is engaged with the first catch portion.

According to a preferred embodiment of the present invention, when the concealed hand wheel device includes a second stopper bracket, an end surface of the second lateral arm of the second stopper bracket is formed as a second inclined surface inclined toward a lateral inner side in a vertically downward direction, and the upright arm of the first stopper bracket has a first inclined surface that engages with the second inclined surface.

According to a preferred embodiment of the present invention, the upper end face of the bottom wall of the housing is formed with a first annular groove for receiving the elastic member.

According to a preferred embodiment of the invention, the interior of the hand wheel carrier is formed with a cylindrical cavity configured to receive the resilient member.

According to a preferred embodiment of the present invention, the hand wheel includes a grip portion for a driver to grip and a cylindrical portion located below the hand wheel portion.

According to a preferred embodiment of the present invention, a top portion of the hand wheel bracket is formed with a cylindrical portion that is insertable into the cylindrical portion, and the cylindrical portion are configured to be able to fix a bearing therebetween.

According to a preferred embodiment of the invention, the stop means is formed as a stop boss protruding from the inner surface of the side wall, the stop shelf being movably fixed to the hand wheel carrier.

According to a preferred embodiment of the invention, the stop means is formed as a stop boss protruding from an outer surface of the hand wheel carrier, the stop being movably fixed on an inner surface of the side wall.

According to a preferred embodiment of the present invention, the hidden hand wheel device comprises a plurality of limiting frames, wherein the plurality of limiting frames are uniformly arranged along the circumferential direction of the hidden hand wheel device.

On the basis of the common general knowledge in the field, the preferred embodiments can be combined randomly to obtain the preferred examples of the invention. Other systems, methods, features and advantages of the invention will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description and this summary, be within the scope of the invention, and be protected by the accompanying claims.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals in the drawings refer to like parts. It will be appreciated by persons skilled in the art that the drawings are intended to illustrate preferred embodiments of the invention without any limiting effect on the scope of the invention, and that the various components in the drawings are not drawn to scale.

Fig. 1 is a schematic structural view of a hand wheel device in a conventional state;

fig. 2 is a schematic structural diagram of a hand wheel device in an operating state;

fig. 3 is a schematic structural view of a handwheel device in a conventional state, which shows the internal structure of the handwheel device;

FIG. 4 is a cross-sectional view of the hand wheel device taken along the line A-A of FIG. 1;

fig. 5 is a schematic structural view of the hand wheel device in a first working state, which shows the internal structure of the hand wheel device;

fig. 6 is a schematic structural view of the hand wheel device in a second working state, which shows the internal structure of the hand wheel device;

fig. 7 shows a cross-sectional view of the handwheel device in the direction B-B of fig. 2.

Detailed Description

The inventive concept of the present invention will be described in detail below with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment in accordance with the present invention and other ways of practicing the invention will occur to those skilled in the art and are within the scope of the invention. In the following detailed description, directional terms, such as "upper", "lower", "inner", "outer", "longitudinal", "lateral", and the like, are used with reference to the orientation depicted in the accompanying drawings. Components of embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting.

Referring to hidden handwheel devices 100 of fig. 1-2, hidden handwheel devices 100 are shown in a normal state (i.e., hidden state) and hidden handwheel devices 100 are shown in an operational state, respectively. In operation, the driver may steer the aircraft wheels by turning the hand wheel 30. The hidden handwheel device 100 can also be used in other transportation equipment such as vehicles.

Referring to fig. 3-7, a hidden handwheel device 100 in accordance with a preferred embodiment of the present invention is shown from different angles, in different operating states. The hidden handwheel device 100 is composed of a shell 20, a handwheel 30, a handwheel support 3, a limiting frame, a limiting mechanism and the like.

Referring to fig. 4 and 7 in conjunction with the other figures, the housing 20 is composed of a top wall 21, a bottom wall 22, and a side wall 23 connecting the top and bottom walls 21, 22, etc., which is generally cylindrical in configuration or other shape not shown that is adapted to fit within the respective cab. Wherein the top wall 21, bottom wall 22 and side walls 23 collectively define an interior cavity C of the housing 20. The top wall 21 of the housing 20 defines a first opening 42 for the hand wheel 30 to enter and exit the cavity C.

The handwheel 30 is movable between a retracted position (fig. 4) housed within the cavity C and an operating position (fig. 7) outside the housing 20 for maneuvering the aircraft. In the retracted position, the upper surface of the handwheel device 100 is formed as a relatively flat surface. The hand wheel 30 is composed of a grip portion 1 for the driver to grip and a cylindrical portion 2 located below the grip portion. The upper surface of the grip 1 is formed in an arc-shaped configuration for facilitating the placement of the palm of the hand, and the lower surface is formed in a continuous wave-shaped configuration for facilitating the gripping of the hand wheel 30 by the respective fingers. The cylindrical portion 2 below the grip portion 1 serves as a support structure for the hand wheel 30, which may be formed as one piece with the grip portion 1.

The grip portion 1 extends upwardly and laterally outwardly from the cylindrical portion 2. In this case, the barrel 2 can be used as a pilot's palm rest in the operating state. Because the cylindrical part 2 is designed in a sinking way, the bending angle (between 30 and 45 degrees) formed by the connecting beam between the cylindrical part 2 and the holding part 1 has a certain height difference between the cylindrical part 2 and the holding part 1, so that the hand wheel 30 is more ergonomic and provides better operation feeling for a driver.

A receiving slot 28 is provided in the top wall 21 of the housing 20 for receiving the grip portion 1, which prevents the hand wheel 30 from actively or forcibly rotating when in the retracted position. Preferably, the accommodation groove 28 is set at a position corresponding to a position where the grip 1 aligns the aircraft wheel.

The hand wheel 30 is supported by the hand wheel bracket 3 and is rotatably fixed to the hand wheel bracket 3. In the embodiment of fig. 3-7, the top of the hand wheel bracket 3 projects upwardly to form a cylindrical portion 36 that can be inserted into the cylindrical portion 2. A bearing, not shown, is fixed between the outer surface of the cylindrical portion 36 and the inner surface of the cylindrical portion 2. Through the fit relation of the cylindrical part 36 and the cylindrical part 2, the hand wheel 30 and the hand wheel bracket 3 form a rotation fit relation and can be fixed in the inner cavity C in a synchronous lifting way. In the operational state of the hand wheel 30, the driver can turn the hand wheel 30 from the right position of fig. 5 to the right position of fig. 6, or vice versa, i.e. from the position of fig. 6 to the position of fig. 5.

The interior of the hand wheel frame 3 is formed with a cylindrical cavity 34, and the cylindrical cavity 34 is used to accommodate the elastic member 4 such as a pressure spring or a pneumatic cylinder having a constant pressure. Fig. 3-7 show the elastic member 4 in the form of a compression spring. In the normal state (hidden state) of the handwheel device 100 shown in fig. 3 and 4, the resilient member 4 is in a compressed state, with its two ends abutting against the bottom of the cylindrical cavity 34 (in fig. 4-7, the bottom of the cylindrical cavity 34 is located at an upper position of the cylindrical cavity 34) and the bottom wall 22 of the housing 20, respectively. In the operating condition shown in figures 5-7 (corresponding to the operating position of the hand wheel), the elastic member 4 is restored to the natural stretch condition, with its lower end held immobile by being fixed in the bottom wall 22 of the casing 20 and its upper end out of contact with the bottom of the cylindrical cavity 34. Alternatively, in the operating condition of the handwheel device 100 of fig. 5-7, the resilient member 4 is in a naturally extended condition with its ends just abutting the bottom of the cylindrical cavity 34 and the bottom wall 22 of the housing 20.

In order to securely fix the resilient member 4 to the bottom wall 22 of the housing 20 to prevent play which could interfere with the normal operation of the handwheel device 100, the upper end surface of the bottom wall 22 of the housing 20 is formed with a first annular groove 29 for receiving the resilient member 4.

Alternatively to the manner of securing the resilient member 4, the handwheel carrier 3 may not necessarily be provided with a cylindrical cavity 34. Both ends of the elastic member 4 abut against the upper surface of the bottom wall 22 and the lower surface of the hand wheel bracket 3, respectively. At this time, in order to ensure that the hand wheel support 3 and the hand wheel 30 are not deflected in the process of lifting the hand wheel support 3 and the hand wheel 30 by the elastic members 4, a plurality of elastic members 4 which are uniformly distributed may be arranged between the upper surface of the bottom wall 22 and the lower surface of the hand wheel support 3.

The structure for restraining the hand wheel 30 in the retracted position is described below. The structure is composed of first limit frames 7 and 8, second limit frames 5 and 6 (limit mechanisms) and the like. According to fig. 3-7, the first stop brackets 7, 8 are fixed on the radial outer edge of the hand wheel frame 3 in a laterally movable manner, and the back side is provided with a drive mechanism (comprising the lower elastic elements 15, 16 and the electromagnetic elements 9, 10) for driving the hand wheel frame to move laterally. The first restraint frames 7, 8 have a first transversely extending arm a1 and a vertically extending upright arm a 2. The upright arm a2 extends obliquely outward and upward from one lateral end of the first lateral arm a1 to form together with the first lateral arm a1 a first stopper 7, 8 in an L-shaped configuration.

The first stop ledges 7, 8 may be provided at radially opposite ends of the hand wheel frame 3 as shown in figures 1-7, respectively, or more than one. The more first stop brackets 7, 8 are preferably arranged evenly along the outer edge of the axis of the hand wheel carrier 3.

The other lateral end of the first stopper 7, 8 is formed as a flange 41. The wall of the hand wheel carrier 3 is provided with a spacing cavity 31 which can receive the other transverse end of the first spacing brackets 7, 8 (i.e. the end where the flange 41 is located). A plurality of limit steps 32 are formed on the wall surface of the limit chamber 31. Each of the stopping steps 32 defines a lateral movement range of the first stopping frame 7, 8. The flanges 41 of the first retaining brackets 7, 8 extend into the retaining cavity 31 and are fixed on the hand wheel bracket 3 in a laterally movable manner.

The driving mechanism on the back side of the first limiting frame 7, 8 comprises a lower elastic element 15, 16 (spring) and an electromagnetic element 9, 10 (electromagnet) which are positioned in the limiting cavity 31. Referring to fig. 4, after the flanges 41 of the first spacing frames 7, 8, the lower elastic members 15, 16, and the electromagnetic members 9, 10 are placed in the spacing cavity 31, the lower elastic members 15, 16 are in a compressed state and abut against the first spacing frames 7, 8 and the bottom of the spacing cavity 31, respectively. The electromagnetic members 9, 10 fixed in the spacing cavity 31 generate suction force when being electrified, so that the first spacing frames 7, 8 can move inwards in radial direction against the elastic force of the lower elastic members 15, 16.

The second stopper frames 5, 6 (stopper mechanisms) are provided on a support step 24 formed on the side wall 23 of the housing 20. The second stop ledges 5, 6 are formed as generally L-shaped brackets having a second transverse arm B1 extending transversely and for abutting the first stop ledges 7, 8 and a straight arm B2 bent upwardly by the second transverse arm B1. The back sides of the second limiting frames 5 and 6 are provided with upper elastic pieces 11, 12, 13 and 14. The upper elastic members 11, 12, 13, 14 can move the second limiting frames 5, 6 transversely to the hand wheel support 3, so that the lower surfaces of the second limiting frames 5, 6 are attached to the upper surfaces of the first limiting frames 7, 8, and the hand wheel 30 is prevented from being maintained at the retraction position by the upward movement of the first limiting frames 7, 8.

The support steps 24 for supporting the second retention frames 5, 6 are substantially flush with the upper surfaces of the first retention frames 7, 8 when the hand wheel 30 is in the retracted position.

In order to prevent the second stopper frames 5 and 6 from moving too far inward in the lateral direction and affecting the lifting of the hand wheel 30, the top wall 21 of the housing 20 is formed with a first stopper wall 25 extending toward the bottom wall 22 of the housing 20. The length of the first stopper wall 25 in the longitudinal direction of the handwheel device 100 is substantially the same as the length of the straight arm B2 of the second stopper bracket 5, 6. After the second spacing frames 5, 6 are mounted in place, the upper and lower surfaces of the second transverse arm B1 abut the first spacing wall 25, the support step 24 respectively, and in the retracted position of the handwheel 30 shown in fig. 4, the lower surface of the second transverse arm B1 also simultaneously abuts the upper surfaces of the first spacing frames 7, 8.

In the case where the first stopper frames 7, 8 are provided, the upper elastic members 11, 12, 13, 14 are set to be pressed against the inner wall surface of the housing side wall 22 and the second stopper frames 5, 6, respectively, so that the second stopper frames 5, 6 are fitted to the first stopper wall 25. A plurality of upper elastic members 11, 12, 13, 14 may be provided on the back side of the second position-limiting frames 5, 6, so as to ensure that the second position-limiting frames 5, 6 are well abutted against the first position-limiting wall 25.

Referring to fig. 4, in a normal state, the lower elastic members 15, 16 push the first spacing frames 7, 8 laterally outward so that the first spacing frames 7, 8 are located at the radially outermost sides of their moving range and are spaced by the outer spacing steps 32 of the spacing cavities 31. The upper elastic elements 11, 12, 13, 14 push the second stop ledges 5, 6 radially inwards such that the second stop ledges 5, 6 are located radially innermost in their range of movement. Thereby, the second limit brackets 5, 6 and the first limit brackets 7, 8 (hand wheels 30) are closest to each other in the lateral direction, and the second limit brackets 5, 6 block the first limit brackets 7, 8 on the longitudinal ascending path of the first limit brackets 7, 8 (hand wheels 30), so that the first limit brackets 7, 8 (hand wheels 30) are locked in the cavity C.

Referring to fig. 7, when the electromagnetic elements 9 and 10 are energized, the first limit brackets 7 and 8 will move radially inward against the elastic force of the lower elastic elements 15 and 16 by the suction force generated by the electromagnetic elements 9 and 10 and abut against the limit step 32 on the radial inner side of the hand wheel bracket 3, the first limit brackets 7 and 8 and the second limit brackets 5 and 6 are separated from the abutting relationship, and the hand wheel bracket 3 and the hand wheel 30 automatically rise to the operating position by the elastic force of the elastic element 4.

In the above process of locking and releasing the hand wheel 30 in and from the retracted position, it will be appreciated that the second retaining brackets 5, 6 are always held in the position of fig. 4, i.e. at the radially innermost position of their range of movement. In this way, alternatively, the second stopper frames 5, 6 may be formed as members fixed to the side wall 23 of the housing 20 or formed integrally with the side wall 23 of the housing 20, and the handwheel device 100 may not be provided with the upper elastic pieces 11, 12, 13, 14 and the first stopper wall 25, in which case the stopper mechanism is formed as a stopper boss protruding from the inner surface of the side wall 23.

Based on the same mechanism, the positions of the first limiting frames 7, 8 and the second limiting frames 5, 6 on the hand wheel support 3 and the side wall 23 can be adjusted alternatively, and the first limiting frames 7, 8 and the second limiting frames 5, 6 can be adjusted up and down symmetrically along the longitudinal direction of the hand wheel support 3. That is, the limit cavities 31 are provided on the side walls 23 of the housing 20, and the first limit brackets 7, 8 and the driving mechanisms on the back sides of the first limit brackets 7, 8 are correspondingly provided in the limit cavities 31 on the side walls 23 of the housing 20. At this time, the upright arm a2 of the first spacing bracket 7, 8 is inclined downward and radially inward by the first lateral arm a 1. And the second stopper frames 5, 6 are formed in such a manner that the second lateral arm B1 is located on the upper side of the straight arm B2, and the second stopper frames 5, 6 are fixed to the outer surface of the hand wheel frame 3 or are formed as an integral member with the hand wheel frame 3, that is, the second stopper frames 5, 6 are formed as stopper bosses protruding from the outer surface of the hand wheel frame 3.

Although various alternatives have been described above in which the first stop brackets 7, 8 can be fixed firmly to the outside of the hand wheel carrier 3 or the side wall 23 of the housing 20 (including being integrally formed), and correspondingly the second stop brackets 5, 6 can be fixed firmly to the side wall 23 of the housing 20 or the outside of the hand wheel carrier 3 (including being integrally formed), the embodiment of fig. 3-7 is an optimum one, which allows the driver to adjust the hand wheel 30 from the retracted position of fig. 4 to the operating position of fig. 5-7 in the event that the solenoid 9, 10 is unable to obtain power due to an accident.

Specifically, the top wall 21 of the housing 20 is formed with a second opening 43 that fits the top of the second spacing frame 5, 6. According to the embodiment shown in fig. 3 to 7 with the second stop ledges 5, 6 and the upper resilient elements 11, 12, 13, 14, the driver can move the first stop ledges 7, 8 radially outwards by hand, so that the second stop ledges 5, 6 are out of abutment with the first stop ledges 7, 8. The hand wheel bracket 3 (hand wheel 30) can be normally lifted up by the elastic member 4. Therefore, the second limiting frames 5 and 6 and the upper elastic members 11, 12, 13 and 14 in this embodiment can be regarded as redundant mechanisms of the lower elastic members 15 and 16 and the electromagnetic members 9 and 10, which can avoid the accident that the driver needs to operate the hand wheel 30 but cannot operate.

In the case of the second stop 5, 6, the second stop 5, 6 may be provided with a laterally outwardly protruding stop 45 on the outer wall surface near the top. The inner surface of the side wall 23 of the housing 20 is formed with a groove 44 matching the shape of the stopper 45. After the blocking portion 45 is inserted into the groove 44, it can shield the second opening 43, so as to prevent foreign matters such as dust and debris from entering the inner cavity C of the handwheel device 100 and affecting the normal operation of the handwheel device 100.

Optionally, the blocking portion 45 is formed with an inwardly recessed dust-proof groove 46 at a surface facing the top wall 21 of the housing 20. The dust-proof groove 46 can temporarily store the foreign matters falling on the blocking part 45, and the accumulated foreign matters can remind the staff of timely cleaning.

The end surface of the second lateral arm B1 of the second stopper frame 5, 6 is formed into a second inclined surface S2 inclined toward the laterally inner side in the vertically downward direction, and the upright arm a2 of the first stopper frame 7, 8 has a first inclined surface S1 which engages with the second inclined surface S2.

After the hand wheel 30 is raised from the retracted position to the operating position by the resilient member 4, the hand wheel 30 may be maintained in the operating position by the following snap structure. Specifically, the top wall 21 of the housing 20 is formed with a second stopper wall 26 extending toward the bottom wall 22 of the housing 20. The second stopper wall 26 is located radially inward of the first stopper wall 25, and a second engaging portion 27 protruding radially outward is provided on a lower surface thereof. Correspondingly, the upper ends of the vertical arms a2 of the first limit brackets 7 and 8 are formed with first buckling parts 18 extending radially inward.

Referring to fig. 7, when the second latch portion 27 is engaged with the first latch portion 18, the hand wheel 30 is suspended from the second latch portion 27 and is held in the operating position. The pilot can now rest the centre of his hands against the barrel 2 of the handwheel 30 without any concern. Note that, in order to ensure that the first engaging portion 18 and the second engaging portion 27 are held at the engaging position shown in fig. 7, the first stopper frames 7 and 8 need to be continuously held inside the radial movement range thereof. Therefore, the electromagnetic members 9 and 10 need to be continuously kept in the energized state, so that the first position-limiting brackets 7 and 8 can continuously overcome the elastic force of the lower elastic members 15 and 16.

The complete operation of the handwheel device 100 is briefly described below. First, referring to fig. 4 and 1, the electromagnetic members 9 and 10 are not energized, the first position limiting frames 7 and 8 are positioned at the outermost radial sides of the moving range thereof by the elastic action of the lower elastic members 15 and 16, and the second position limiting frames 5 and 6 are positioned at the innermost radial sides of the moving range thereof by the elastic action of the upper elastic members 11, 12, 13 and 14. First spacing 7, 8, second spacing 5, 6 are in vertical mutual butt, and the elastic component 4 that is in the pressurized state can't be with hand wheel support 3, the ascending lifting of hand wheel 30, and hand wheel 30 maintains and withdraws the position.

Subsequently, the electromagnetic parts 9 and 10 are electrified, the first limiting frames 7 and 8 move radially inwards under the action of the suction force of the electromagnetic parts 9 and 10, the second limiting frames 5 and 6 are separated from the first limiting frames 7 and 8 in butt joint, the elastic component 4 naturally extends to push the hand wheel support 3 and the hand wheel 30 upwards, and the hand wheel 30 enters the operation state shown in fig. 7. The first and second snap-fit portions 18, 27 engage each other to maintain the hand wheel 30 in the operational state of fig. 7. In this process, if the length and thrust of the elastic member 4 are not sufficient to push the hand wheel bracket 3 and the hand wheel 30 to the operating state of fig. 7. The driver can also manually lift the hand wheel 30 into a state in which the first and second latch portions 18 and 27 are engaged with each other.

In the state that the electromagnetic elements 9 and 10 cannot be energized, alternatively, in the previous step, referring to fig. 4, the driver pushes the second position-limiting frames 5 and 6 radially outward by hands or other prying tools (the left second position-limiting frame 5 moves to the left, and the right second position-limiting frame 6 moves to the right), so that the second position-limiting frames 5 and 6 are separated from the first position-limiting frames 7 and 8. Based on the same mechanism of the above steps, the hand wheel 30 is raised to an operating state.

Finally, after the hand wheel 30 is rotated, the grip portion 1 of the hand wheel 30 is returned to the right position (fig. 5). The electromagnetic parts 9 and 10 are powered off, the first limiting frames 7 and 8 naturally move to the radial outer side of the moving range under the action of the lower elastic parts 15 and 16, and the first buckling part 18 and the second buckling part 27 are disengaged. It can be understood that if the electromagnetic members 9, 10 cannot be energized before, the first stopper frames 7, 8 are naturally located radially outside their moving range, and the first engaging portion 18 and the second engaging portion 27 are maintained in the disengaged state. At this time, referring to fig. 5 and 7, when the driver presses the hand wheel 30 downward, the first stopper brackets 7 and 8 move downward and move radially inward as guided by the second inclined surface S2. When the upper surfaces of the first spacing frames 7, 8 move downward beyond the lower surfaces of the second spacing frames 5, 6, the first spacing frames 7, 8 are immediately moved to the radial outside of the moving range thereof by the elastic action of the lower elastic members 15, 16. The handwheel device 100 returns to the normal state of fig. 4.

The scope of the invention is limited only by the claims. Persons of ordinary skill in the art, having benefit of the teachings of the present invention, will readily appreciate that alternative structures to the structures disclosed herein are possible alternative embodiments, and that combinations of the disclosed embodiments may be made to create new embodiments, which also fall within the scope of the appended claims.

Description of reference numerals:

a hand wheel device: 100.

a housing: 20.

roof wall: 21.

bottom wall: 22.

side wall: 23.

supporting a step: 24.

first spacing wall: 25.

a second limiting wall: 26.

a second buckling part: 27.

accommodating grooves: 28.

a hand wheel: 30.

a holding part: 1.

a cylindrical portion: 2.

a hand wheel support: 3.

a limiting cavity: 31.

limiting the step: 32.

a limiting component: 4.

first spacing: 7. and 8. the preparation method comprises the following steps.

A second limiting frame: 5. 6.

Electromagnetic parts: 9. 10.

A lower elastic member: 15. 16.

An upper elastic piece: 11. 12, 13 and 14.

A first transverse arm: A1.

standing the arm: A2.

a first inclined plane: and S1.

Flange: 41.

a second transverse arm: B1.

a straight arm: B2.

a second inclined plane: and S2.

A first buckling part: 18.

a first annular groove: 29.

a first opening: 42.

a second opening: 43.

groove: 44.

a blocking part: 45.

a dust-proof groove: 46.

a cylindrical cavity: 34.

a cylindrical portion: 36.

inner cavity: C.