TWM646006U - Brake device - Google Patents

Abstract

A brake device which is adapted for a guide disposed in a gravity direction is provided. The brake device includes a frame, a brake block and a plurality of wheels. The brake block is disposed at the frame, has a friction surface and is adapted to move relatively to the frame. The wheels face the friction surface and are disposed in a line and pivoted in the frame. Each of the wheels maintains an interval with the friction surface. When the brake device is applied at the guide and the brake block is at a brake state, the friction surface contacts a first surface of the guide and each of the wheels contacts a second surface of the guide opposite to the first surface such that the brake block and the wheels together clamp the guide.

Description

brake device

The invention relates to a braking device, and in particular to a braking device applied to a guide rail.

In a bottom-lift elevator, the steel cables used for lifting and lowering traverse the bottom of the elevator car from opposite sides of the elevator car. The steel cable guides the steering by two guide wheels located under the elevator car and supports the elevator car from the bottom of the elevator car. When the lifting steel rope of the above-mentioned bottom-suspended elevator needs to be replaced, the elevator car must be hoisted first to make the steel rope appear in a relaxed state from the original tension state, so that the steel rope can be removed from the guide wheel and replaced.

During the process of replacing the steel cables of the above-mentioned bottom-suspended elevator, construction personnel must work within the load-bearing frame added below the elevator car. For safety reasons, the load-bearing frame must be equipped with a braking device so that when the load-bearing frame accidentally detaches from the elevator car and falls, the braking device can exert a braking effect.

However, the braking device of the load-bearing frame is arranged on the guide rails that guide the elevator car in the elevator shaft. When the braking device exerts a braking effect, the guide rail will be clamped by the two brake blocks of the braking device, causing the guide rail to be worn by the brake blocks.

This invention provides a braking device, which is suitable for the load-bearing frame under the elevator car body, making the operation of replacing the steel cable safer and less likely to wear the guide rail.

The present invention provides a braking device, which is suitable for a guide rail that is substantially arranged along a direction of gravity. The braking device includes a frame, a braking block and a plurality of rollers. The braking pad is arranged on the frame, has a friction surface, and is suitable for moving relative to the frame. These rollers are arranged in a row facing the friction surface and are pivoted in the frame. Each roller maintains a distance from the friction surface. When the braking device is applied to the guide rail and the brake pad is in a braking state, the friction surface contacts a first surface of the guide rail, and each roller contacts a second surface of the guide rail relative to the first surface, so that the brake pad and the rollers are jointly clamped Live rail.

In an embodiment of the present invention, when the braking device is applied to the guide rail and the brake pad is in a pre-braking state, the brake pad is located at a first position relative to the frame, and the friction surface contacts a first surface of the guide rail. The roller is located on a second surface of the guide rail relative to the first surface, and the friction surface applies a first friction force to the first surface. When the braking device is applied to the guide rail and the braking pad is in the braking state, the braking pad is located at a second position relative to the frame, and the friction surface applies a second friction force to the first surface. The first position is different from the second position, the absolute value of the second friction force is greater than the absolute value of the first friction force, and the direction of the second friction force is substantially the same as the direction of gravity.

In an embodiment of the present invention, the above-mentioned braking device further includes a rod, which is arranged on the frame and is adapted to move relative to the frame. The brake block is fixed to the rod.

In an embodiment of the present invention, the above-mentioned braking device further includes an elastic member, which is arranged outside the frame and one end of the elastic member is connected to the rod. When the braking device is applied to the guide rail and the braking pad changes from a non-braking state to a pre-braking state, the elastic member exerts a restoring force on the rod and the direction of the restoring force is substantially opposite to the direction of gravity.

In an embodiment of the present invention, the above-mentioned braking device further includes another elastic member arranged in the frame. When the braking device is applied to the guide rail and the brake pad is in the pre-braking state, a first force is applied to the brake pad due to another elastic member. When the braking device is applied to the guide rail and the braking pad is in the braking state, a second force is applied to the braking pad due to another elastic member. The direction of the first force is substantially the same as the direction of the second force and is substantially perpendicular to the direction of the first friction force and the direction of the second friction force. The absolute value of the second force is greater than the direction of the first force. Absolute value. The absolute value of the first friction force is proportional to the absolute value of the first acting force, and the absolute value of the second friction force is proportional to the absolute value of the second acting force.

In an embodiment of the present invention, the above-mentioned braking device further includes an action block connected to another elastic member. Another elastic member is disposed between one side wall of the frame and the action block. An inclined surface of the action block faces and is substantially parallel to an inclined surface of the brake pad relative to the friction surface. When the braking device is applied to the guide rail and the brake pad is in the pre-braking state, another elastic member exerts force on the action block, so that the first action force is applied to the brake pad. When the braking device is applied to the guide rail and the brake pad is in the braking state, another elastic member exerts force on the action block, so that the second action force is applied to the brake pad. When the brake pad moves from the first position to the second position, the inclined surface of the action block and the inclined surface of the brake pad slide relative to each other, so that the absolute value of the second action force is greater than the absolute value of the first action force.

In an embodiment of the present invention, the above-mentioned braking device further includes a ball bearing, which is arranged between the inclined surface of the action block and the inclined surface of the braking block.

Figure 1 is a schematic three-dimensional view of a braking device according to an embodiment of the present invention. FIG. 2 is a schematic side view of the braking device of FIG. 1 being arranged on the guide rail and the braking pad is in a non-braking state. Please refer to Figures 1 and 2. The present invention provides a braking device 200, which is suitable for a guide rail G arranged substantially along a gravity direction D1. The guide rail G may be located in an elevator shaft (not shown) and may guide an elevator car (not shown) moving up and down in the elevator shaft. When the steel cables that support and drive the elevator car to move up and down in the elevator shaft along the guide rail G are replaced for maintenance, a load-bearing frame (not shown, which is used to carry maintenance personnel) is added under the elevator car and fixed. The braking device 200 on the carrying frame is arranged on the guide rail G. The function of the braking device 200 is to exert a braking effect when the load-bearing frame accidentally detaches from the elevator car body and falls.

The braking device 200 of this embodiment may include a frame 210, a braking block 220, a plurality of rollers 230, a rod 240, a first elastic member 250, and at least a second elastic member 260 (schematically shown in Figure 2 Two second elastic members 260), an action block 270, a ball bearing 280 and a fixing member 290. The frame 210 is fixed on the fixing member 290 , and the braking block 220 is arranged on the frame 210 . The brake pad 220 has a friction surface 222 and an inclined surface 224 opposite to the friction surface 222 . The braking block 220 is adapted to move relative to the frame 210 . These rollers 230 are arranged in a row facing the friction surface 222 and are pivoted in the frame 210 . Each roller 230 maintains a distance I from the friction surface 222 .

In this embodiment, the rod 240 can be disposed on the frame 210 and is adapted to move relative to the frame 210 , and the braking block 220 can be fixed on the rod 240 . The first elastic member 250 can be disposed outside the frame 210 and can be sleeved on the rod 240 . One end 252 of the first elastic member 250 can be connected to the rod 240 , and the other end 254 of the first elastic member 250 can be connected to the fixing member 290 . When used, the fixing member 290 can be fixedly disposed on the above-mentioned carrying frame.

In this embodiment, these second elastic members 260 can be disposed in the frame 210 , and the action block 270 can be connected to each second elastic member 260 . In detail, each second elastic member 260 can be disposed between the side wall 212 of the frame 210 and the action block 270 , and an inclined surface 272 of the action block 270 can face and be substantially parallel to the inclined surface 224 of the braking block 220 . The ball bearing 280 may be disposed between the inclined surface 272 of the action block 270 and the inclined surface 224 of the braking block 220 .

When the braking device 200 of this embodiment is applied to the guide rail G and the braking block 220 is in the non-braking state shown in FIG. 2 , the handle 202 of the braking device 200 has been rotated downward in advance to drive the rod 240 so that the rod 240 It moves downward along the gravity direction D1 relative to the frame 210 , and the inclined surface 224 of the braking block 220 slides relative to the inclined surface 272 of the action block 270 . When the braking device 200 is in the non-braking state shown in Figure 2, the handle 202 is fixed to the position shown in Figure 2, the first elastic member 250 is elastically stretched and each second elastic member 260 is elastically compressed, and the rod 240 and The brake pad 220 is fixed at the position shown in FIG. 2 and the friction surface 222 of the brake pad 220 does not contact the guide rail G.

FIG. 3A shows a schematic side view of the braking device according to this embodiment of the present invention, which is arranged on the guide rail and the brake pads are in a pre-braking state. FIG. 3B is a schematic diagram of the braking device of FIG. 3A . Please refer to Figures 3A and 3B. When the braking device 200 of this embodiment is applied to the guide rail G and the braking block 220 changes from the non-braking state shown in Figure 2 to the pre-braking state shown in Figures 3A and 3B, the braking The handle 202 of the device 200 is rotated upward to release the lever 240, so that the lever 240 is affected by the restoring force of the first elastic member 250 and moves upward relative to the frame 210 against the direction of gravity D1, and the inclined surface of the brake block 220 224 slides relative to the inclined surface 272 of the action block 270, and each second elastic member 260 also exerts force on the action block 270 in a gradually increasing manner to substantially push the braking block 220 along a horizontal direction D2 perpendicular to the gravity direction D1. . It can be seen from Figure 3A that the direction D3 of the restoring force is substantially opposite to the direction of gravity D1.

When the brake pad 220 is in the pre-braking state shown in Figures 3A and 3B, the handle 202 is fixed to the position shown in Figure 3A, and the brake pad 220 is located at a first position P1 relative to the frame 210. The friction of the brake pad 220 The surface 222 slightly contacts a first surface S1 of the guide rail G, each roller 230 is located on a second surface S2 of the guide rail G relative to the first surface S1, and the friction surface 222 of the brake pad 220 exerts a first friction force on the second surface S1 of the guide rail G. One surface S1. At this time, these second elastic members 260 still exert force on the action block 270, so that a first action force (the direction of which is substantially the same as the horizontal direction D2) is applied to the brake pad 220, so that the friction surface 222 of the brake pad 220 slightly contacts the guide rail. The first surface S1 of G. In summary, when the brake pad 220 is in the pre-braking state shown in FIG. 3A and FIG. 3B , the first force is applied to the brake pad 220 due to the second elastic members 260 .

Figure 4 is a schematic diagram illustrating a braking device arranged on a guide rail and a braking pad in a braking state according to an embodiment of the present invention. Please refer to FIG. 4 . When the braking device 200 is applied to the guide rail G and the brake block 220 is in a braking state, the brake block 220 is located at a second position P2 relative to the frame 210 , and the friction surface 222 of the brake block 220 contacts the guide rail G. The first surface S1 of each roller 230 contacts the second surface S2 of the guide rail G, and the friction surface 222 of the brake pad 220 exerts a second friction force on the first surface S2, so that the brake pad 220 and these rollers 230 are clamped together. Rail G. The first position P1 (see FIG. 3B ) of the brake pad 220 relative to the frame 210 is different from the second position P2. The absolute value of the second friction force is greater than the absolute value of the first friction force, and the direction of the second friction force is substantially Same as gravity direction D1. At this time, these second elastic members 260 exert force on the action block 270, so that a second action force (the direction of which is substantially the same as the horizontal direction D2) is applied to the brake pad 220, so that the friction surface 222 of the brake pad 220 contacts the guide rail G. First surface S1. In summary, when the brake pad 220 is in the braking state shown in FIG. 4 , the second elastic members 260 cause the second force to be applied to the brake pad 220 .

Please refer to Figure 3B and Figure 4. The direction of the first force in the pre-braking state (which is substantially the same as the horizontal direction D2) and the direction of the second force in the braking state (which is substantially the same as the horizontal direction D2) The direction of the first friction force in the pre-braking state and the direction of the second friction force in the braking state are substantially the same and substantially perpendicular to the direction of the second friction force in the braking state (which is the same as the gravity direction D1), and the absolute value of the second acting force is greater than the first The absolute value of the force. In addition, the absolute value of the first friction force is proportional to the absolute value of the first action force, and the absolute value of the second friction force is proportional to the absolute value of the second action force. In this way, when the brake pad 220 is in the pre-braking state shown in FIG. 3B , the friction surface 222 of the brake pad 220 slightly contacts the first surface S1 of the guide rail G, resulting in a first friction force with a smaller absolute value. When the brake pad 220 is in the In the braking state shown in FIG. 4 , the friction surface 222 of the brake pad 220 contacts the first surface S1 of the guide rail G, resulting in a second friction force with a large absolute value. In addition, when the brake block 220 (relative to the frame 210) moves from the first position P1 to the second position P2, the inclined surface 272 of the action block 270 and the inclined surface 224 of the brake block 220 can slide relative to each other through the ball bearing 280 as an intermediary. , and the action block 270 further compresses these second elastic members 260, and this makes the absolute value of the second acting force in the braking state greater than the absolute value of the first acting force in the pre-braking state, resulting in the second acting force in the braking state. The absolute value of the friction force is greater than the absolute value of the first friction force in the pre-braking state.

Based on the above, the braking device suitable for the load-bearing frame under the elevator car according to the embodiment of the present invention has a design in which the braking blocks and multiple rollers are arranged relative to each other. Therefore, the guide rail is not easily worn when the braking device generates a braking effect (braking effect).

200:braking device

202: handle

210:Frame

212:Side wall

220:brake block

222: Friction surface

224, 272: Inclined surface

230:Roller

240: Rod

250, 260: elastic parts

252, 254: end

270:Action block

280:Ball bearing

290: Fixtures

D1: Gravity direction

D2: horizontal direction

D3: Direction of restoring force

G: guide rail

I:interval

P1, P2: position

S1, S2: surface

Figure 1 is a schematic three-dimensional view of a braking device according to an embodiment of the present invention.

FIG. 2 is a schematic side view of the braking device of FIG. 1 being arranged on the guide rail and the braking pad is in a non-braking state.

FIG. 3A shows a schematic side view of the braking device according to this embodiment of the present invention, which is arranged on the guide rail and the brake pads are in a pre-braking state.

FIG. 3B is a schematic diagram of the braking device of FIG. 3A .

Figure 4 is a schematic diagram illustrating a braking device arranged on a guide rail and a braking pad in a braking state according to an embodiment of the present invention.

200:braking device

202: handle

210:Frame

212:Side wall

220:brake block

222: Friction surface

224, 272: Inclined surface

230:Roller

240: Rod

250, 260: elastic parts

270:Action block

280:Ball bearing

D1: Gravity direction

G: guide rail

I:interval

Claims (7)

A braking device, suitable for a guide rail arranged substantially along a direction of gravity, including: a frame; A braking block is arranged on the frame, has a friction surface, and is adapted to move relative to the frame; and A plurality of rollers are arranged in a row facing the friction surface and are pivoted in the frame, wherein each roller maintains a distance from the friction surface; When the braking device is applied to the guide rail and the brake block is in a braking state, the friction surface contacts a first surface of the guide rail, and each roller contacts a second surface of the guide rail relative to the first surface, The brake block and the rollers jointly clamp the guide rail. The braking device according to claim 1, wherein, When the braking device is applied to the guide rail and the brake block is in a pre-braking state, the brake block is located at a first position relative to the frame, the friction surface contacts the first surface of the guide rail, and each roller is located on the second surface of the guide rail, and the friction surface exerts a first friction force on the first surface; When the braking device is applied to the guide rail and the braking pad is in the braking state, the braking pad is located at a second position relative to the frame, and the friction surface applies a second friction force to the first surface ; The first position is different from the second position, the absolute value of the second friction force is greater than the absolute value of the first friction force, and the direction of the second friction force is substantially the same as the direction of gravity. The braking device according to claim 2 further includes a rod disposed on the frame and adapted to move relative to the frame, wherein the brake block is fixed on the rod. The braking device as claimed in claim 3, further comprising an elastic member disposed outside the frame and one end of the elastic member connected to the rod, wherein when the braking device is applied to the guide rail and the braking block changes from a non-stop When the braking state changes to the pre-braking state, the elastic member exerts a restoring force on the rod and the direction of the restoring force is substantially opposite to the direction of gravity. The braking device as claimed in claim 4 further includes another elastic member disposed in the frame, wherein When the braking device is applied to the guide rail and the brake block is in the pre-braking state, a first force is applied to the brake block due to the other elastic member; When the braking device is applied to the guide rail and the braking block is in the braking state, a second force is applied to the braking block due to the other elastic member; The direction of the first force is substantially the same as the direction of the second force and is substantially perpendicular to the direction of the first friction force and the direction of the second friction force, and the absolute value of the second force is greater than the direction of the second force. The absolute value of the first acting force, the absolute value of the first friction force is proportional to the absolute value of the first acting force, and the absolute value of the second friction force is proportional to the absolute value of the second acting force. The braking device as claimed in claim 5, further comprising an action block connected to the other elastic member, wherein the other elastic member is disposed between one side wall of the frame and the action block, and an The inclined surface faces and is substantially parallel to an inclined surface of the brake pad relative to the friction surface, wherein When the braking device is applied to the guide rail and the brake block is in the pre-braking state, the other elastic member exerts force on the action block so that the first action force is applied to the brake block; When the braking device is applied to the guide rail and the brake block is in the braking state, the other elastic member exerts force on the action block, so that the second action force is applied to the brake block; When the brake pad moves from the first position to the second position, the inclined surface of the action block and the inclined surface of the brake pad slide relative to each other, so that the absolute value of the second action force is greater than the first action force. The absolute value of force. The braking device according to claim 6 further includes a ball bearing disposed between the inclined surface of the action block and the inclined surface of the braking block.