CN207046640U - Overspeed brake structure of stair lift chair - Google Patents

Abstract

An overspeed brake structure of a stair lift chair comprises a main shaft, a brake device and a brake device, wherein the main shaft is driven by a motor to rotate; a claw member connected to the main shaft and rotating synchronously with the main shaft; the hook component has a claw part; the cam piece is connected with the claw piece; the cam piece is provided with a convex abutting part, and the convex abutting part and the claw part of the hook claw piece are radially arranged at a preset angle; a driven unit, which has a cam touch part that can be touched by the convex touch part of the cam piece to make the driven unit swing, a claw part that can be clipped with the claw part of the claw piece, and a switch touch part; a micro switch, which can be contacted by the switch touch part to control the rotation of the motor.

Description

Overspeed brake structure of stair lift chair

technical field

The utility model relates to a stair lift chair, in particular to an overspeed braking structure of a stair lift chair.

Background technique

The overspeed braking structure of the existing stair lift chair has a simple structure, and its actuation is not reliable, and sometimes it is misjudged or should not be actuated and actuated; another more complex structure can indeed achieve the actuation effect, but its Then occupy too much use space; Therefore, the lack of the overspeed brake structure of existing stair lift chair still needs to be improved.

Utility model content

In view of the above-mentioned defects in the prior art, the main purpose of the present invention is to provide an overspeed braking structure for a stair lift chair, which can simplify the structure and enable clear and fast actuation.

In order to achieve the above object, the utility model provides an overspeed braking structure of a stair lift chair, which is arranged on a base body. The overspeed brake structure of the stair lift chair includes a main shaft, which is driven to rotate by a motor; The claw part is connected to the main shaft and rotates synchronously with the main shaft; the hook part has a claw part; a cam part is connected to the hook part; the cam part has a convex part, and the convex part and the The claws of the claw part are arranged radially apart from a predetermined angle; a driven unit has a cam touching part that can be touched by the convex part of the cam part to make the driven unit deflect, and a claw part can be connected with the cam part. The claws of the claw parts are engaged, a switch touch part; a reset part, which deflects the driven unit so that the cam touch part tends to approach the cam piece; a micro switch, which can be controlled by the switch touch part. The motor turns.

Preferably, the driven unit includes a cam bumper and a pawl bumper connected to the cam bumper.

Preferably, the touch position of the switch is on the claw touch piece.

Preferably, the driven unit has a roller pivotally connected to the cam bumper, and the outer circumference of the roller constitutes the cam bumper.

Preferably, the reset member is connected between a reset portion of the driven unit and the base body.

Preferably, the cam touch piece and the hook touch piece are combined and fixed by a through-pipe, and two bushes are respectively inserted into the inner holes of the through-pipe, and the two bushes are pivoted on a pivot rod.

Description of drawings

Fig. 1 is an assembled perspective view of a preferred embodiment of the present invention.

Fig. 2 is an actuation state diagram of a preferred embodiment of the present invention.

FIG. 3 is a perspective view of FIG. 2 .

Fig. 4 is a partial three-dimensional exploded view of a preferred embodiment of the present invention.

Fig. 5 is a partially assembled sectional view of a preferred embodiment of the present invention.

Fig. 6 is another action state diagram of a preferred embodiment of the present invention.

FIG. 7 is a perspective view of FIG. 6 .

【Main components】

spindle (10);

Claw pieces (20);

Claws (22);

Cam member (30);

Convex portion (32);

driven unit (4);

Cam touch piece (40);

Resetting joint (42);

Roller (45);

Cam touch part (46);

Claw touch piece (50);

Claw part (51);

Switch touch part (52);

Wear pipe (61);

Bushing (62);

Pivot (63);

Reset part (70);

micro switch (80);

Substrate (A);

bolt (B).

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in the figure, the utility model provides an overspeed braking structure of a stair lift chair, which is arranged on a base body (A). The overspeed brake structure of the stair lift chair includes:

A main shaft (10) is driven to rotate by a motor.

A claw part (20) is connected to the main shaft (10) and rotates synchronously with the main shaft (10); the claw part (20) has a claw part (22).

A cam part (30) is connected to the claw part (20); the cam part (30) has a protruding part (32), and the protruding part (32) and the pawl of the claw part (20) The parts (22) are radially arranged at predetermined angles, and in a preferred embodiment of the present invention, they are arranged at about 90 degrees, and are divided into four convex parts (32) and four claw parts (22).

In a preferred embodiment of the present utility model, the claw member (20) and the cam member (30) are combined and fixed by four bolts (B).

A driven unit (4) includes a cam touch piece (40) and a claw touch piece (50) connected to the cam touch piece (40).

Wherein, the cam touch piece (40) has a swing arm (41) and a reset joint (42), and a roller (45) is pivotally connected to the swing arm (41), and the circumference of the roller (45) forms a The cam contact portion (46) can be contacted by the convex contact portion (32) of the cam member (30) to deflect the driven unit (4).

Wherein, the claw touch part (50) has a claw part (51) which can be engaged with the claw part (22) of the claw part (20), and a switch touch part (52) is located at the other pivot center. one end.

In addition, the cam touch piece (40) and the claw touch piece (50) are combined and fixed by a through pipe (61) (this example is fixed by welding, but it is not limited, it can also be integrally formed, or any other can be affixed) structure), and then two bushes (62) (which can be self-lubricating or oil-containing bushes or bearings, etc., but not limited) are respectively inserted into the inner hole of the through-pipe (61) from both sides, and the two bushes (62) is then covered with a pivot (63), and the pivot (63) is fixed on the base (A).

A reset member (70) is connected between the reset joint portion (42) of the driven unit (4) and the base body (A). The reset member (70) deflects the driven unit (4) so that the cam touch portion (46) tends to approach the cam member (30).

A micro switch (80) can be controlled by the contact of the switch touch portion (52) to rotate the motor.

As shown in Figures 2 and 3, it shows that the cam member (30) has not yet rotated to the point where its convex portion (32) hits the cam bump (46) of the driven unit (4), and of course the driven unit ( 4) It will not be deflected, and the claw contact piece (50) will not engage the claw portion (22).

When rotating a predetermined angle, the cam member (30) rotates until its convex portion (32) just touches the cam contact portion (46) of the driven unit (4), although the driven unit (4) has been deflected , due to the dislocation design, the claw touch piece (50) still cannot engage the claw (22).

That is, the cam member (30) rotates to the point where its convex contact portion (32) has left the cam contact portion (46) of the driven unit (4), will the claw contact member (50) engage This pawl (22) is determined by the rotating speed.

When the rotating speed is normal, the claw touch piece (50) returns before the claw portion (22) arrives and cannot be engaged with the claw portion (22), and the main shaft (10) still operates normally at such rotating speeds.

However, when the rotating speed is too fast, the cam touch part (46) is continuously and quickly pushed against by the convex part (32) of the cam member (30), that is to say, the claw touch part (50) has not yet returned to its original position. It can be engaged with the claw (22); at this time, the switch touch portion (52) touches the micro switch (80), so that the spindle (10) can be controlled to reduce the rotation speed or stop the rotation, so that the Its security is shown in Figure 6 and Figure 7.

In addition to the above examples, the utility model can also implement changes as follows:

For example, the reset member ( 70 ) is not limited to be a tension spring as mentioned above, it can also be a compression spring or a torsion spring, or it can be any other actuating component.

To sum up, the present invention can simplify the structure, and can make the action clear and fast, thus achieving the purpose of the present invention.

The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the protection scope determined by the claims.

Claims (9)

1. a kind of Guo Su Brake bassinet structures of stair lifting chair, it is located at a matrix (A), it is characterised in that the stair lifting chair Su Brake bassinet structures of Guoing include：

One main shaft (10), it is driven rotation by a motor；

One hooks bluff piece (20), be arranged in the main shaft (10) and with main shaft (10) synchronous axial system；The hook bluff piece (20) has a pawl Portion (22)；

One cam member (30), it is arranged in the hook bluff piece (20)；The cam member (30) has a convex supporting part (32), the convex supporting part (32) It is separated by predetermined angular with claw (22) radial arrangement of the hook bluff piece (20)；

One driven unit (4), there is a cam, which to touch portion (46) and can be hit against by the convex supporting part (32) of the cam member (30), makes this driven Unit (4) beat, a claw portion (51) can engage with the claw (22) of the hook bluff piece (20), and a switch touches portion (52)；

One return unit (70), the driven unit (4) deflection is set the cam is touched portion (46) tendency close to the cam member (30)；

One microswitch (80), it can be touched portion (52) contact by the switch and control the revolution.

2. the Guo Su Brake bassinet structures of stair lifting chair as claimed in claim 1, the wherein driven unit (4) include a cam and touched Part (40) and a hook pawl touch part (50) and are connected to the cam and touch part (40).

3. the Guo Su Brake bassinet structures of stair lifting chair as claimed in claim 2, the wherein switch touch portion (52) position and touched in the hook pawl Part (50).

4. the Guo Su Brake bassinet structures of stair lifting chair as claimed in claim 3, the wherein driven unit (4) have a roller (45) It is articulated in the cam and touches part (40), the excircle of the roller (45) forms the cam and touches portion (46).

5. the Guo Su Brake bassinet structures of stair lifting chair as claimed in claim 2, the wherein driven unit (4) have a roller (45) It is articulated in the cam and touches part (40), the excircle of the roller (45) forms the cam and touches portion (46).

6. the Guo Su Brake bassinet structures of stair lifting chair as described in Claims 2 or 3 or 4 or 5, the wherein return unit (70) are arranged in The one of the driven unit (4) is resetted between socket part (42) and the matrix (A).

7. the Guo Su Brake bassinet structures of stair lifting chair as claimed in claim 6, the wherein cam touch part (40) touches part with hooking pawl (50) combined and fixed with a poling (61), plug the endoporus of the poling (61) respectively with two bushings (62), two bushing (62) is again Pivot is covered in a hinged arm (63).

8. the Guo Su Brake bassinet structures of stair lifting chair as described in Claims 2 or 3 or 4 or 5, the wherein cam touch part (40) with hooking Pawl touches part (50) and combines fixation with a poling (61), plugs the endoporus of the poling (61), two bushing respectively with two bushings (62) (62) pivot is covered again in a hinged arm (63).

9. the Guo Su Brake bassinet structures of stair lifting chair as claimed in claim 1, the wherein return unit (70) are arranged in the driven list The one of first (4) is resetted between socket part (42) and the matrix (A).