TWM508541U - Emergency brake device of accessibility lifting equipment - Google Patents

Description

Emergency braking device for barrier-free lifting equipment

This creation relates to an emergency braking device, and more particularly to an emergency braking device for barrier-free lifting devices.

The barrier-free lifting device is a device for the elderly who are inconvenient to move or the patient can easily go up and down the stairs by the barrier-free lifting device. The conventional barrier-free lifting device comprises two slide rails, a seat and a driving device. The seat is driven to descend between the floors by the rotation of the gear of the drive shaft of the drive device along the row of teeth on one of the two slide rails. The conventional barrier-free lifting device further includes a braking means for stopping the rotation of the driving device by powering off to achieve the purpose of emergency braking.

However, the braking means for stopping the rotation of the drive shaft of the drive device by powering down can only function under the normal operation of the drive device, in case the drive shaft of the drive device idling or even breaking when the seat travels on the two slide rails, The braking method can not make the emergency stop of the seat even if the driving shaft of the driving device is stopped by the power failure, and the seat will slide down the two rails under the state of the brake failure, causing the seat to be lowered. The passenger on board was thrown and injured, which is quite dangerous.

Moreover, even if the drive shaft is normally operated, since the brake-discharging means of the conventional barrier-free lifting device is manual, once the descending speed of the seat exceeds the upper limit, the user often does not have time to start the brake because the event occurs too suddenly. The means is either over-stunned and forgetting to start the brakes, causing the seat to slip down the two rails, causing the passengers on the seat to be thrown and injured, which is quite dangerous.

The main purpose of this creation is to provide an emergency braking device for barrier-free lifting equipment. When the seat descending speed exceeds the upper limit, regardless of the normal operation or failure of the drive shaft, the brake member will abut the ratchet, so that the ratchet together with the drive shaft and the cam Stop turning to achieve the effect of emergency braking.

The second objective of the present invention is to provide an emergency braking device for an unobstructed lifting device, which adjusts the swing of the brake member by the weight of the weight to set the upper limit of the speed of the driving shaft, thereby adjusting the seat lowering speed. The effect of the upper limit.

In order to achieve the foregoing, the present invention provides an emergency braking device for an unobstructed lifting device, which is disposed on a driving device, which is disposed on a seat and includes a rotating shaft and a driving shaft, and the seat is driven by the driving device The drive shaft of the device rises and falls along a slide rail, and the emergency brake device of the barrier-free lifting device comprises a brake member, a cam and a ratchet.

The brake component includes a body rotatably disposed on the rotating shaft and having a first end.

The cam is fixed to the drive shaft, and the outer peripheral surface of the cam includes at least one protrusion that pushes the brake member to rotate the body of the brake member between a release position and a braking position.

The ratchet is fixed to the drive shaft, and the ratchet includes a plurality of ratchets. When the body of the brake member is in the release position, the first end of the body of the brake member is away from the ratchet, and the ratchet rotates with the drive shaft, and the brake member When the body is in the braking position, the first end of the body of the brake member abuts one of the ratchets, the ratchet stops rotating, and the drive shaft stops rotating with the ratchet.

According to a preferred embodiment, the bottom of the first end of the body of the brake member protrudes from a tapered latch portion, and the body of the brake member is located at the first position of the body of the brake member. Resist one of the ratchets. Preferably, when the body of the brake member is in the braking position, the latching portion of the first end of the body of the braking member is away from the one of the ratchet teeth away from the second end side of the body of the braking member. Each of the ratchets protrudes from the outer peripheral surface of the ratchet, and each ratchet includes a straight face and a curved surface, the straight face includes a top end and a bottom end, the curved surface includes a top end and a bottom end, and the ratchet face is straight The top end is connected to the top end of the curved surface of the ratchet, and the bottom end of the straight surface of the ratchet is connected to the bottom end of the curved surface of the other ratchet, and the direction facing the straight surface of the ratchet is defined as the first rotation of the ratchet In the direction, when the body of the brake member is in the braking position, the latching portion of the first end of the body of the braking member is away from the straight side of one of the ratchets away from the second end side of the body of the braking member. The reverse direction of the first rotation direction of the ratchet wheel is defined as a second rotation direction of the ratchet wheel. When the drive shaft rotates in the first rotation direction, the seat is lowered along the slide rail by the drive shaft, and the driving When the shaft rotates in the second rotational direction, the seat rises along the slide rail by the drive shaft. Wherein the ratchet rotates in the second rotational direction, the latching portion of the first end of the body of the brake member is disengaged from the straight face of one of the ratchets, and is pushed back to the release position by the projection of the cam.

According to a preferred embodiment, the brake component comprises a weight, the body of the brake component has a second end, the weight is disposed at the second end of the body of the brake component, and the body of the brake component defines an axis a hole passing through the shaft hole of the body of the brake member, wherein the protruding portion of the cam is pushed between the second end of the body of the brake member and the shaft hole. Preferably, the brake component comprises a bearing disposed between the second end of the body of the brake member and the shaft hole, and the projection of the cam pushes the bearing. Wherein the bearing protrudes from the bottom of the body of the brake member. Wherein the distance between the bearing and the shaft hole is smaller than the distance between the bearing and the second end of the body of the brake member. Wherein the weight of the weight is proportional to the swing of the body of the brake member.

According to a preferred embodiment, the outer peripheral surface of the cam includes a plurality of projections. Wherein the outer peripheral surface of the cam is polygonal, and each corner of the outer peripheral surface of the polygonal cam is defined as the projection. The outer peripheral surface of the cam is hexagonal.

According to a preferred embodiment, when the rotational speed of the drive shaft is less than an upper limit of the rotational speed, the swing of the body of the brake member is smaller than the swing between the release body and the braking position of the brake member, so that the body of the brake member The first end is kept away from the ratchet. When the rotational speed of the drive shaft exceeds the upper limit of the rotational speed, the swing of the body of the brake member is equal to the swing of the body of the brake member from the release position to the braking position, so that the body of the brake member Located at the brake position, the first end of the body of the brake member abuts one of the ratchets.

The effect of this creation is that once the drive shaft is idling or breaking and the seat is stalled, or the drive shaft is normal but the seat is descending too fast and the user panics, the creation of the barrier-free lifting device The emergency brake device can automatically stop the rotation of the drive shaft when the seat is stalled by the cooperation of the brake parts, the cam and the ratchet, so as to achieve the effect of emergency braking and protect the user from being thrown out from the seat. Create and improve the safety of barrier-free lifting equipment. Secondly, the present invention controls the swing of the body of the brake member by adjusting the weight of the weight to set the upper limit of the rotational speed of the drive shaft.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

Please refer to the first to fifth figures, which are perspective views of different perspectives of the barrier-free lifting device 10. The barrier-free lifting device 10 includes two slide rails 20, a seat 30, a driving device and an emergency braking device 50 of a barrier-free lifting device provided by the creation. The two slide rails 20 are disposed at the armrests of a staircase, so the two slide rails 20 extend in the direction of the stairs. For example, the stairs are upward or upward from a floor in a straight line or in a swivel manner. When the lower ground extends to the upper floor or the next floor, the two sliding rails 20 extend from the first floor up or down to the upper floor or the same as the stairs except the front and rear ends. The next floor. one of A row 21 of teeth is disposed on the slide rail 20. The seat 30 includes a base 31. The driving device is disposed on the base 31. The driving device includes a rotating shaft 41, a motor, a driving shaft 42, and a gear. The axis of the drive shaft 42 is parallel to the axis of the shaft 41. The drive shaft 42 is disposed on the motor. The gear 421 is disposed on the drive shaft 42 and the gear 421 is meshed with the tooth row 21. The driving device further includes a swing main roller 43, a lower swing roller 44, a lower swing arm 45, and a casing 46, and the lower swing main roller 43, the lower swing secondary roller 44, the lower swing arm 45, and the outer casing 46 of the driving device. And other detailed components and their connection relationships are conventional and will not be described. The seat 30 can be raised and lowered along the two slide rails 20 on the side of the stairway between the two floors by the rotation of the drive shaft 42 of the driving device. Referring to Figures 3 to 5, the emergency braking device 50 of the barrier-free lifting device includes a brake member 60, a cam 70 and a ratchet 80.

The brake member 60 includes a body 61, a weight 62 and a bearing 63. The body 61 of the brake member 60 has a first end 611 and a second end 612. The bottom of the first end 611 of the body 61 of the brake member 60 protrudes from a tapered latch portion 613. The weight 62 is disposed at the second end 612 of the body 61 of the brake member 60. The body 61 of the brake member 60 defines a shaft hole 614 which is located closer to the first end 611 of the body 61 of the brake member 60. In this embodiment, the two sides of the body 61 of the brake member 60 protrude from the first end 611 of the body 61 of the brake member 60 to protrude two corresponding sleeves 615. The shaft holes 614 extend through the two sleeves 615 and The body 61 corresponds to the location of the two sleeves 615. The shaft 41 passes through the shaft hole 614, so that the body 61 of the brake member 60 is rotatably provided on the rotating shaft 41. The bearing 63 is disposed between the second end 612 of the body 61 of the brake member 60 and the shaft hole 614. Preferably, the bearing 63 protrudes from the bottom of the body 61 of the brake member 60, and the distance between the bearing 63 and the shaft hole 614 is smaller than the distance between the bearing 63 and the second end 612 of the body 61 of the brake member 60.

The cam 70 is fixed to the drive shaft 42. The outer peripheral surface of the cam 70 includes a plurality of projections 71. Preferably, the outer peripheral surface of the cam 70 is polygonal, and each corner of the outer peripheral surface of the polygonal cam 70 is defined as the projection 71. Preferably, the outer peripheral surface of the cam 70 is hexagonal, and the cam 70 includes six projections 71. In the present embodiment, the cam 70 is located below the brake member 60. When the cam 70 rotates with the drive shaft 42, the protrusions 71 sequentially urge the bearing 63 of the brake member 60 upwardly. The body 61 of the brake member 60 is rotated between a release position and a brake position, that is, the maximum swing of the body 61 of the brake member 60 is the rotation of the body 61 of the brake member 60 from the release position to the brake position. Between the swings. More specifically, the swing size of the body 61 of the brake member 60 depends on two elements; first, the protrusions 71 of the cam 70 apply upward force to push the frequency of the bearing 63 of the brake member 60. The swing of the body 61 of the brake member 60 is proportional; secondly, the weight of the weight 62 is proportional to the swing of the body 61 of the brake member 60. With regard to the first element, specifically, the faster the rotational speed of the drive shaft 42, the faster the rotational speed of the cam 70, the faster the rotational speed of the cam 70, and the convex portions 71 of the cam 70 are sequentially applied. The higher the frequency of the bearing 63 pushed up to the brake member 60, the higher the frequency at which the bearing 63 of the brake member 60 is urged upward, and the larger the swing of the body 61 of the brake member 60. On the contrary, the slower the rotational speed of the drive shaft 42 is, the slower the rotational speed of the cam 70 is, and the slower the rotational speed of the cam 70 is, the protrusions 71 of the cam 70 are sequentially urged upwardly to the brake member 60. The lower the frequency of the bearing 63, the lower the frequency at which the bearing 63 of the brake member 60 is urged upward, and the smaller the swing of the body 61 of the brake member 60. With regard to the second element, in particular, since the projections 71 of the cam 70 are fixed to the upward direction of the bearing 63 of the brake member 60, the biasing arm of the bearing 63 to the shaft 41 is The fixed weight of the weight 62 to the rotating shaft 41 is fixed. Therefore, according to the principle of the lever, the lighter the weight of the weight 62, the smaller the swing of the body 61 of the brake member 60, the higher the upper limit of the rotational speed of the drive shaft 42, the higher the upper limit of the lowering speed of the seat 30, The projections 71 of the cam 70 push the bearing 63 of the brake member 60 at a high frequency to rotate the body 61 of the brake member 60 to the braking position. The heavier the weight of the weight 62, the larger the swing of the body 61 of the brake member 60, the lower the upper limit of the rotational speed of the drive shaft 42, the lower the upper limit of the lowering speed of the seat 30, the lower of the cam 70 The frequency at which the projections 71 push the bearing 63 of the brake member 60 is not too high, so that the body 61 of the brake member 60 can be rotated to the braking position. The "upper speed limit" refers to the highest speed limit at which the drive shaft 42 rotates, and the so-called "down speed limit" refers to the highest speed limit at which the seat 30 is lowered. The direction in which the body 61 of the brake member 60 rotates from the release position to the brake position is defined as a first rotation direction A, and the direction in which the body 61 of the brake member 60 rotates from the brake position to the release position is defined as a second direction. The rotation direction B, the first and second rotation directions A, B are opposite to each other, as shown in the sixth figure.

The ratchet 80 is fixed to the drive shaft 42. The ratchet wheel 80 includes a plurality of ratchet teeth 81 protruding from the outer peripheral surface of the ratchet wheel 80. Each of the ratchet teeth 81 includes a straight surface 811 and a curved surface 812. The straight surface 811 includes a top end and a bottom end. The 812 includes a top end and a bottom end. The top end of the straight surface 811 of the ratchet 81 is connected to the top end of the curved surface 812 of the ratchet 81, and the connection point of the top end of the straight surface 811 of the ratchet 81 and the top end of the curved surface 812 of the ratchet 81 is the ratchet The apex of 81, that is, the foremost end or the fore end of the ratchet 81. The bottom end of the straight surface 811 of the ratchet 81 is connected to the bottom end of the curved surface 812 of the other ratchet 81 to form a groove-like structure between the two ratchet teeth 81. The direction in which the straight face 811 of the ratchet 81 faces is defined as the first rotational direction C of the ratchet 80, and the reverse direction of the first rotational direction C of the ratchet 80 is defined as a second rotational direction D of the ratchet 80. Further, the first rotational direction C of the ratchet 80 is the same as the second rotational direction B of the body 61 of the brake member 60, the second rotational direction D of the ratchet 80 and the first rotation of the body 61 of the brake member 60. Direction A is the same. In other words, when the first rotational direction C of the ratchet 80 is rotated clockwise with the second rotational direction B of the body 61 of the brake member 60, the second rotational direction D of the ratchet 80 and the body of the brake member 60 The first rotation direction A of the 61 is the same as the counterclockwise rotation; or, when the first rotation direction C of the ratchet 80 is opposite to the second rotation direction B of the body 61 of the brake member 60, the ratchet 80 is The second rotational direction D is the same as the first rotational direction A of the body 61 of the brake member 60.

Referring to the first, second and sixth figures, when the drive shaft 42 is rotated in the first rotational direction C, the seat 30 is lowered along the two slide rails 20 by the drive shaft 42 of the drive device. When the seat 42 is rotated in the second rotational direction D, the seat 30 is raised along the two slide rails 20 by the drive shaft 42 of the drive device. During this process, the cam 70 is controlled by the drive shaft 42 and likewise rotates in the first rotational direction C or the second rotational direction D. The cam 70 is either in the first rotational direction C or The second rotation direction D rotates, and the protrusions 71 of the cam 70 continuously push the bearing 63 of the brake member 60, and the weight 62 of the brake member 60 is affected by the gravity, so that the brake is caused. The body 61 of the member 60 continuously rotates back and forth in the first and second rotational directions A, B. Where the rotational speed of the drive shaft 42 is less than the upper limit of the rotational speed, the swing of the body 61 of the brake member 60 is smaller than the swing between the release position of the brake member 60 and the braking position, and the body 61 of the brake member 60 The latch portion 613 of the first end 611 is kept away from the ratchet 80. Thereby, the cam 70, the ratchet 80 and the drive shaft 42 can smoothly rotate together in the first rotational direction C or the second rotational direction D, so that the seat 30 can rise or fall without hindrance in a seat. The upper speed limit is raised or lowered along the two slide rails 20 between the two floors.

Referring to the first, second and seventh figures, when the rotational speed of the drive shaft 42 exceeds the upper limit of the rotational speed, the swing of the body 61 of the brake member 60 is exactly maximized, that is, equal to the release position of the body 61 of the brake member 60. The swing to the brake position causes the body 61 of the brake member 60 to be in the braking position. In this embodiment, when the rotational speed of the drive shaft 42 in the first rotational direction C exceeds the upper limit of the rotational speed, the speed at which the seat 30 descends along the two slide rails 20 exceeds the upper limit of the descending speed of the seat 30. The body 61 of the brake member 60 is located at the brake position, and the latching portion 613 of the first end 611 of the body 61 of the brake member 60 is away from the second end 612 side of the body 61 of the brake member 60. The straight face 811 of the ratchet 81. Therefore, the ratchet 80 is limited to the latching portion 613 of the first end 611 of the body 61 of the brake member 60, and cannot rotate in the first rotational direction C to stop rotating. The drive shaft 42 stops with the ratchet 80. When rotated, the cam 70 also stops rotating without pushing the bearing 63 of the brake member 60 again. As soon as the drive shaft 42 stops rotating, the seat 30 is immediately clamped and fixed on the two slide rails 20, and will not continue to slide down to achieve the effect of emergency braking.

Referring to the first, second and eighth figures, when the drive shaft 42 rotates with the ratchet wheel 80 in the second rotational direction D, the first end 611 of the body 61 of the brake member 60 is clicked. The portion 613 is disengaged from the straight surface 811 of one of the ratchet teeth 81, and is urged upward by one of the protruding portions 71 of the cam 70 to be rotated back to the second rotational direction B to return to the release position, and the body 61 of the brake member 60 is The latching portion 613 of the one end 611 is thus away from the ratchet 80, releasing the braking state, causing the driving shaft 42, the cam 70 and the ratchet 80 to return to the rotatable state, so that the seat 30 again along the two sliding rails 20 rises and falls between the two floors.

The present invention is characterized in that, once the drive shaft 42 is idling or breaking during the process of the seat 30 traveling or rising or descending, the seat 30 is stalled, or the drive shaft 42 is normal. However, when the seat 30 is descending too fast and the user panics, the emergency braking device 50 of the created barrier-free lifting device can immediately stop the driving by the cooperation of the braking member 60, the cam 70 and the ratchet 80. The rotation of the shaft 42 achieves the effect of an emergency braking, protects the user from being thrown out from the seat 30, and is physically and mentally damaged, thereby improving the safety of the barrier-free lifting device 10.

Secondly, the present invention controls the swing of the body 61 of the brake member 60 by adjusting the weight of the weight 62 to set the upper limit of the rotational speed of the drive shaft 42, thereby adjusting the seat 30 to descend along the two slides 20. The effect of the speed cap. What is important is that the concept of the means for adjusting the upper limit of the lowering speed of the seat 30 is relatively simple. The lighter the weight 62, the smaller the swing of the body 61 of the brake member 60, the higher the lower limit of the speed of the seat 30 Larger, the heavier the weight 62 is, the larger the swing of the body 61 of the brake member 60 is, the smaller the upper limit of the lowering speed of the seat 30 is.

Moreover, the tapered latch portion 613 of the first end 611 of the body 61 of the brake member 60 is away from the second end 612 side of the body 61 of the brake member 60 to abut against the straight surface 811 of one of the ratchet teeth 81. The click effect is quite excellent, enabling the ratchet 80 to stop rotating immediately.

Moreover, in the present invention, if the drive shaft 42 is restarted and rotated in the second rotational direction D, and the cam 70 and the ratchet 80 are also rotated in the second rotational direction D, the brake state of the present creation can be immediately released. Very easy to operate.

In addition, the projections 71 of the cam 70 of the present invention are the bearings 63 that push the brake member 60, which not only does not affect the upward pushing force of the projections 71 on the bearing 63 of the brake member 60, but also The friction between the projections 71 and the bearing 63 can be reduced, so that the projections 71 are less likely to wear and extend the service life of the projections 71.

The above description is only for the purpose of explaining the preferred embodiment of the present invention, and is not intended to impose any form of limitation on the creation, so that any modification or alteration of the creation made in the same creative spirit is provided. , should still be included in the scope of protection of this creative intent.

10‧‧‧Accessible lifting equipment
20‧‧‧Slide rails
21‧‧‧ teeth row
30‧‧‧ seats
31‧‧‧Base
41‧‧‧ shaft
42‧‧‧ drive shaft
421‧‧‧ Gears
43‧‧‧Swing main wheel
44‧‧‧Swinging secondary roller
45‧‧‧ Lower swing arm
46‧‧‧Shell
50‧‧‧Emergency brake device
60‧‧‧煞车件
61‧‧‧Ontology
611‧‧‧ first end
612‧‧‧ second end
613‧‧‧Card Department
614‧‧‧Axis hole
615‧‧‧ casing
62‧‧‧weights
63‧‧‧ bearing
70‧‧‧ cam
71‧‧‧Protruding
80‧‧‧ ratchet
81‧‧‧ ratchet
811‧‧‧ Face to face
812‧‧‧ curved surface
A‧‧‧first direction of rotation
B‧‧‧second direction of rotation
C‧‧‧first direction of rotation
D‧‧‧second direction of rotation

The first picture is a perspective view of the barrier-free lifting device with this creation.

The second picture is a perspective view of another perspective of the barrier-free lifting device equipped with the creation.

The third figure is a perspective view of the interior of the housing of the seat of the barrier-free lifting device.

The fourth figure is a combination diagram of the present invention in which the outer casing is removed in the third figure and the lower swing main roller and the lower swing arm of the driving device.

The fifth picture is a perspective view of the creation.

The sixth figure is a schematic diagram of the rotation of the body of the brake member when the seat does not exceed the upper limit when the ascending or descending speed is exceeded.

The seventh picture is a schematic diagram of the car of this creation.

The eighth picture is a schematic diagram of the release of the car.

20‧‧‧Slide rails

21‧‧‧ teeth row

41‧‧‧ shaft

42‧‧‧ drive shaft

421‧‧‧ Gears

43‧‧‧Swing main wheel

46‧‧‧Shell

50‧‧‧Emergency brake device

60‧‧‧煞车件

614‧‧‧Axis hole

70‧‧‧ cam

80‧‧‧ ratchet

81‧‧‧ ratchet

811‧‧‧ Face to face

812‧‧‧ curved surface

Claims (15)

An emergency braking device for an unobstructed lifting device is disposed on a driving device. The driving device is disposed on a seat and includes a rotating shaft and a driving shaft. The seat is raised and lowered along a sliding rail by the driving shaft of the driving device. The emergency braking device of the barrier-free lifting device comprises: a brake component comprising a body rotatably disposed on the rotating shaft and having a first end; a cam fixed to the driving shaft, the outer circumference of the cam The surface includes at least one protrusion that pushes the brake member to rotate the body of the brake member between a release position and a braking position; and a ratchet fixed to the drive shaft, the ratchet includes a plurality of ratchets, the first end of the body of the brake member being remote from the ratchet when the body of the brake member is in the release position, the ratchet rotating with the drive shaft, and the body of the brake member is located at the braking position The first end abuts against one of the ratchets, the ratchet stops rotating, and the drive shaft stops rotating with the ratchet. The emergency brake device of the unobstructed lifting device of claim 1, wherein the bottom of the first end of the body of the brake member protrudes from a tapered portion, and the body of the brake member is located at the braking position. The latching portion of the first end of the body of the brake member is against one of the ratchet teeth. The emergency braking device of the unobstructed lifting device of claim 2, wherein the body of the brake member is located away from the body of the brake member when the body of the brake member is in the braking position The second end side is against one of the ratchets. An emergency braking device for an unobstructed lifting device according to claim 3, wherein each ratchet protrudes from an outer peripheral surface of the ratchet, each ratchet includes a straight surface and a curved surface, the straight surface including a top end and a bottom surface The curved surface includes a top end and a bottom end, the top end of the straight surface of the ratchet is connected to the top end of the curved surface of the ratchet, and the bottom end of the straight surface of the ratchet is connected to the bottom of the curved surface of the other ratchet The direction in which the straight face of the ratchet is oriented is defined as the first rotational direction of the ratchet. When the body of the brake member is in the braking position, the latching portion of the first end of the body of the brake member is away from the body of the brake member. The second end side is against the straight face of one of the ratchets. The emergency braking device of the barrier-free lifting device of claim 4, wherein a reverse direction of the first rotation direction of the ratchet is defined as a second rotation direction of the ratchet, and the driving shaft is in the first rotation direction When rotating, the seat is lowered along the sliding rail by the driving shaft, and the seat is raised along the sliding rail by the driving shaft when the driving shaft rotates in the second rotating direction. The emergency braking device of the barrier-free lifting device of claim 4, wherein the reverse direction of the first rotation direction of the ratchet is defined as a second rotation direction of the ratchet, and the ratchet rotates to the second In the direction of rotation, the latching portion of the first end of the body of the brake member is disengaged from the straight face of one of the ratchets and is pushed back to the release position by the projection of the cam. The emergency brake device of the unobstructed lifting device of claim 1, wherein the brake component comprises a weight, the body of the brake component has a second end, and the weight is disposed on the brake component a second end of the body, the body of the brake member defines a shaft hole, the rotating shaft passes through the shaft hole of the body of the brake member, and the protruding portion of the cam is pushed against the body of the brake member Between the second end and the shaft hole. The emergency brake device of the barrier-free lifting device of claim 7, wherein the brake component comprises a bearing disposed between the second end of the body of the brake component and the shaft hole, the cam of the cam The top pushes the bearing. The emergency brake device of the barrier-free lifting device of claim 8, wherein the bearing protrudes from the bottom of the body of the brake member. The emergency braking device of the barrier-free lifting device of claim 8, wherein the distance between the bearing and the shaft hole is smaller than the distance between the bearing and the second end of the body of the brake member. The emergency braking device of the barrier-free lifting device of claim 7, wherein the weight of the weight is proportional to the swing of the body of the brake member. An emergency braking device for an unobstructed lifting device according to claim 1, wherein the outer peripheral surface of the cam includes a plurality of projections. An emergency braking device for an unobstructed lifting device according to claim 12, wherein an outer peripheral surface of the cam is polygonal, and each corner of the outer peripheral surface of the polygonal cam is defined as the protruding portion. The emergency brake device of the barrier-free lifting device of claim 13, wherein the outer peripheral surface of the cam is hexagonal. The emergency braking device of the unobstructed lifting device according to the first aspect of the invention, wherein when the rotation speed of the driving shaft is less than an upper limit of the rotating speed, the swing of the body of the brake member is smaller than the body of the brake member from the releasing position to the braking The swing between the positions maintains the first end of the body of the brake member away from the ratchet. When the rotational speed of the drive shaft exceeds the upper limit of the rotational speed, the swing of the body of the brake member is equal to the release position of the body of the brake member. The swing to the brake position causes the body of the brake to be in the braking position, and the first end of the body of the brake member abuts one of the ratchets.