A high stability elevator safety clamp

Abstract

This invention discloses a highly stable elevator safety clamp, relating to the field of elevator safety device technology. When the safety clamp operates, the push rod first pushes the entire slider device, and the secondary drive block and the primary drive block slide until the primary drive block abuts against the primary brake block. Then, the primary drive block pushes the primary brake block to slide along the guide rail until the primary brake block abuts against the guide rail. At this time, the spring gradually compresses, and the friction between the primary brake block and the guide rail increases, completing the first braking action and causing the elevator to gradually decelerate. Next, the secondary drive block continues to slide until it abuts against the secondary brake block and pushes it against the guide rail. Subsequently, the secondary brake block abuts against the guide rail and produces a braking effect, thus completing the second braking action. This divides the entire braking process of the safety clamp into two parts, which buffers the entire braking process, reduces inertia, and improves the safety performance of the elevator.

Description

Technical Field

[0001] The invention relates to the technical field of elevator safety devices, and in particular to a high-stability elevator safety clamp. Background Art

[0002] The safety clamp is a safety protection device for elevators. The elevator safety clamp device is a safety device that stops the car and clamps it on the guide rail when the elevator speed exceeds the speed limit set by the elevator speed limiter or when the suspension rope breaks or loosens under the control of the speed limiter. It provides effective protection for the safe operation of the elevator. It is generally installed on the car frame or counterweight frame. At the same time, the safety clamp is divided into one-way safety clamp and two-way safety clamp.

[0003] The Chinese patent with publication number CN203212155U discloses a safety clamp, including a safety clamp and a guide rail, the safety clamp includes a speed limit rope, a movable rod, a limit rod brake wheel slider and a brake wheel, the safety clamp is composed of two identical brake structures, which are distributed on both sides of the guide rail, the speed limit rope is arranged at the middle position of the movable rod, one end of the movable rod is fixedly arranged on the safety clamp, and the other end is provided with a brake wheel, the brake wheel slider is fixedly arranged on the safety clamp through a fastener, and the brake wheel slider is connected to the limit rod. The design of two brakes makes the force of the safety clamp and the guide rail uniform, reduces the deformation of the guide rail during use, reduces the harm in the operation of the elevator, and also greatly enhances the braking effect, ensuring the service life and safety of the elevator.

[0004] However, this type of safety clamp directly achieves elevator deceleration and stopping through the friction between the brake wheel and the guide rail. During braking, the time from deceleration to stopping of the elevator is very short, so the inertia is large, and accidents are prone to happen to people in the elevator, which is not safe enough. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the time from deceleration to stopping of the elevator during braking is very short, so the inertia is large, and accidents are prone to happen to people in the elevator, which is not safe enough.

[0006] In order to solve the above technical problems, the present invention provides a high-stability elevator safety clamp, including a body, a speed limiting rope, a guide rail and a braking device for conflicting with the guide rail, characterized in that: the braking device includes a base symmetrically arranged on both sides of the guide rail, a slide groove perpendicular to the guide rail and opened on the base, and a slider device sliding in the slide groove and conflicting with the guide rail, the braking device also includes a push rod connected to the speed limiting rope and pushing the slider device to conflict with the guide rail as the speed limiting rope is pulled, the slider device includes a driven slider and an active slider sequentially arranged in a direction away from the guide rail, and the driven slider includes a driven slider and an active slider. The invention comprises a secondary brake block and a primary brake block coaxially arranged in the secondary brake block, and the length of the primary brake block is greater than that of the secondary brake block, the active slider comprises a coaxial secondary driving block for contacting with the secondary brake block, the secondary driving block is coaxially connected to a primary driving block contacting with the primary brake block at one end of the driven slider, and the cross-sectional area of ​​the primary driving block is less than or equal to the cross-sectional area of ​​the primary brake block, a spring is connected between the secondary driving block and the primary driving block, and the compression stroke of the spring is greater than the sum of the lengths of the protruding portion of the primary driving block and the protruding portion of the primary brake block.

[0007] Technical effect: when the safety clamp is working, the speed limit rope first pulls the push rod, and the push rod then pushes the entire slider device in the direction of the guide rail, and the secondary drive block slides first. Due to the elastic connection between the primary drive block and the secondary drive block, the primary drive block also slides until the primary drive block conflicts with the primary brake block. Since the friction between the primary brake block and the slide groove is small, the first drive block pushes the primary brake block to slide towards the guide rail until the first brake block conflicts with the guide rail. At this time, the entire slider device continues to slide in the direction of the guide rail, and the spring is in a compressed state, so that the first brake block and The friction between the guide rails gradually increases, thereby completing the first braking action and gradually slowing down the elevator; at this time, the secondary drive block continues to slide until it conflicts with the secondary brake block and pushes the secondary brake block to conflict with the guide rail. Since the compression stroke of the spring is greater than the sum of the lengths of the protruding part of the primary drive block and the protruding part of the primary brake block, the secondary brake block can conflict with the guide rail and produce a braking effect, thereby completing the second braking action, dividing the braking process of the entire safety clamp into two parts, while ensuring the braking effect, the entire braking process is buffered, reducing inertia and improving the safety performance of the elevator.

[0008] The technical solution further defined in the present invention is that the primary driving block, the secondary driving block, the primary braking block and the secondary braking block are all configured as rectangular parallelepipeds.

[0009] Furthermore, the thicknesses of the primary driving block, the secondary driving block, the primary braking block and the secondary braking block are set to be equal.

[0010] In the aforementioned high-stability elevator safety clamp, the cross-sectional area of ​​the primary drive block is set to be equal to the cross-sectional area of ​​the primary brake block.

[0011] In the aforementioned high-stability elevator safety clamp, the cross-sectional area of ​​the secondary drive block is set to be equal to the cross-sectional area of ​​the secondary brake block.

[0012] In the above-mentioned high-stability elevator safety clamp, a side surface of the secondary brake block close to the guide rail is covered with a rubber layer.

[0013] The aforementioned high-stability elevator safety clamp has a push rod rotatably connected to a base, and the rotation axis is vertically arranged at the middle position of its own length direction. One end of the push rod close to the guide rail is in conflict with the end face of the active slider away from the impulse slider, and the other end is connected to the speed limiting rope, and the end of the push rod in conflict with the active slider is arranged above the center line of the active slider.

[0014] In the aforementioned high-stability elevator safety clamp, the end of the push rod close to the guide rail is provided with an arc surface that contacts the active sliding block.

[0015] The beneficial effects of the present invention are:

[0016] (1) In the present invention, the shapes of the primary drive block, the secondary drive block, the primary brake block and the secondary brake block are set so that the four can slide more smoothly in the slide groove without affecting each other's sliding. Since the cross section of the cuboid is rectangular, not only the contact area between the primary drive block and the primary brake block, and between the secondary drive block and the secondary brake block is increased, but also the contact area between the primary brake block and the secondary brake block and the guide rail is increased, thereby increasing the braking effect of the entire braking device and improving the braking effect of the safety clamp.

[0017] (2) In the present invention, the cross-sectional areas of the primary drive block, the secondary drive block, the primary brake block and the secondary brake block are arranged so that the end face of the primary drive block completely overlaps with the end face of the primary brake block, thereby ensuring the driving effect of the primary drive block on the primary brake block, and the end face of the secondary drive block completely overlaps with the end face of the secondary brake block, thereby ensuring the driving effect of the secondary drive block on the secondary brake block. The arrangement of the rubber layer increases the friction between the secondary brake block and the guide rail, thereby enhancing the braking effect of the secondary brake block and the entire braking device.

[0018] (3) In the present invention, the setting of the push rod makes the entire braking device simpler in structure while ensuring the braking effect. When the speed limit rope is pulled upward, the other end of the push rod moves downward, and at the same time pushes the entire slider device to slide in the direction of the guide rail. The setting of the arc surface makes the end of the push rod always conflict with the slider device, ensuring the pushing effect of the push rod on the entire slider device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the braking device in the present invention;

[0021] Figure 3 It is a structural schematic diagram of the slider device in the present invention;

[0022] Figure 4 It is a structural schematic diagram of the second-level driving block and the second-level braking block of the present invention when they conflict with each other;

[0023] Figure 5 It is a schematic diagram of the structure when the secondary brake block of the present invention conflicts with the guide rail.

[0024] Among them: 1. main body; 2. speed limit rope; 3. guide rail; 4. brake device; 41. base; 42. slide groove; 43. push rod; 5. slider device; 51. active slider; 511. primary drive block; 512. secondary drive block; 52. driven slider; 521. primary brake block; 522. secondary brake block; 6. spring; 7. rubber layer; 8. arc surface. DETAILED DESCRIPTION

[0025] This embodiment provides a high-stability elevator safety clamp, the structure of which is as follows Figures 1 to 3 As shown, it includes a main body 1 and a vertically arranged guide rail 3, vertical speed limit ropes 2 and a braking device 4 for interfering with the guide rail 3 are symmetrically arranged on both sides of the guide rail 3, and the braking device 4 includes a base 41, a slide groove 42, a push rod 43 and a slider device 5 symmetrically arranged on both sides of the guide rail 3, the base 41 is installed on the main body 1; the slide groove 42 is opened on the side of the base 41 away from the main body 1, and the opening direction of the slide groove 42 is perpendicular to the length direction of the guide rail 3; the slider device 5 is slidably connected in the slide groove 42, and one end of the slider device 5 close to the guide rail 3 is used to interfere with the guide rail 3, and the other end is used to interfere with the end of the push rod 43; the end of the push rod 43 away from the slider device 5 is connected to the speed limit rope 2, and the other end is used to interfere with the slider device 5.

[0026] The slider device 5 includes a driven slider 52 and an active slider 51 which slide in the slide groove 42 respectively, and the two are coaxially arranged in sequence along the direction away from the guide rail 3. The active slider 51 includes a secondary driving block 512 for contacting with the push rod 43, and the side of the secondary driving block 512 away from the push rod 43 is coaxially connected with a primary driving block 511, and the primary driving block 511 is used to contact with the side of the driven slider 52 away from the guide rail 3. The primary driving block 511 and the secondary driving block 512 are both set as rectangular parallelepipeds, and the thickness of the two is set to be equal. A spring 6 is connected between the primary driving block 511 and the secondary driving block 512.

[0027] The driven slider 52 includes a secondary brake block 522 for contacting with the secondary driving block 512, the secondary brake block 522 is coaxially connected with the primary brake block 521, the primary brake block 521 is penetrated by the secondary brake block 522, and the length of the primary brake block 521 is greater than the length of the secondary brake block 522, one end of the primary brake block 521 is in contact with the primary driving block 511, and the other end is used to contact with the guide rail 3, the primary brake block 521 and the secondary brake block 522 are both set as rectangular parallelepiped, and the thickness of the two is set to be equal, and also equal to the thickness of the primary driving block 511, the cross-sectional area of ​​the primary driving block 511 is equal to the cross-sectional area of ​​the primary brake block 521, the cross-sectional area of ​​the secondary driving block 512 is equal to the cross-sectional area of ​​the secondary brake block 522, the side surface of the secondary brake block 522 close to the guide rail 3 is covered with a rubber layer 7, and the compression stroke of the spring 6 is greater than the sum of the lengths of the protruding portion of the primary driving block 511 and the protruding portion of the primary brake block 521.

[0028] The push rod 43 is rotatably connected to the base 41, and the rotation axis is set to be perpendicular to both itself and the base 41, and the rotation axis is set at the middle position of its own length direction. One end of the rotating rod close to the guide rail 3 conflicts with the end face of the active slider 51 away from the impulse slider, and the other end is connected to the speed limit rope 2. The end of the rotating rod that conflicts with the active slider 51 is set above the center line of the active slider 51, and the end of the rotating rod close to the guide rail 3 is provided with an arc surface 8 that conflicts with the secondary drive block 512.

[0029] like Figure 1 As shown, when the safety clamp is working, the speed limit rope 2 is first pulled upward, and under the pulling force, one end of the push rod 43 moves upward, so the other end moves downward. In the process of moving downward, the push rod 43 pushes the secondary drive block 512 to slide in the direction of the guide rail 3. Due to the elastic connection between the primary drive block 511 and the secondary drive block 512, the primary drive block 511 also slides until the primary drive block 511 conflicts with the primary brake block 521, as shown in FIG. Figure 2 As shown, since the friction between the primary brake block 521 and the slide groove 42 is small, the first driving block pushes the primary brake block 521 to slide toward the guide rail 3 until the first brake block conflicts with the guide rail 3, as shown in FIG. Figure 3 As shown, at this time, the entire slider device 5 still has a tendency to continue sliding in the direction of the guide rail 3, and the spring 6 is in a compressed state, so that the pressure between the first brake block and the guide rail 3 gradually increases, that is, the friction between the two gradually increases, thereby completing the first braking effect and gradually slowing down the elevator.

[0030] like Figure 4As shown, at this time, the secondary driving block 512 continues to slide until it conflicts with the secondary braking block 522, and continues to push the secondary braking block 522 to slide in the direction of the guide rail 3 until it conflicts with the guide rail 3. Since the compression stroke of the spring 6 is greater than the sum of the lengths of the protruding portion of the primary driving block 511 and the protruding portion of the primary braking block 521, the secondary braking block 522 can conflict with the guide rail 3, and the spring 6 can continue to be compressed when it conflicts with it, thereby completing the second braking action, as shown in FIG. Figure 5 As shown, the above process divides the braking process of the entire safety clamp into two parts, which buffers the entire braking process while ensuring the braking effect, reduces inertia, and improves the safety performance of the elevator.

[0031] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A high-stability elevator safety clamp, comprising a body (1), a speed limiting rope (2), a guide rail (3), and a braking device (4) for contacting the guide rail (3), characterized in that: The braking device (4) comprises a base (41) symmetrically arranged on both sides of the guide rail (3), a slide groove (42) perpendicular to the guide rail (3) and opened on the base (41), and a slider device (5) sliding in the slide groove (42) and contacting the guide rail (3). The braking device (4) also comprises a push rod (43) connected to the speed limit rope (2) and pushing the slider device (5) to contact the guide rail (3) when the speed limit rope (2) is pulled. The slider device (5) comprises a driven slider (52) and an active slider (51) arranged in sequence along a direction away from the guide rail (3). The driven slider (52) comprises a secondary brake block (522) and a primary brake block (521) coaxially inserted into the secondary brake block (522), and the primary brake block (521) is The length of the brake block (521) is greater than that of the secondary brake block (522); the active slider (51) comprises a coaxial secondary drive block (512) for contacting the secondary brake block (522); one end of the secondary drive block (512) close to the driven slider (52) is coaxially connected to a primary drive block (511) contacting the primary brake block (521); the cross-sectional area of ​​the primary drive block (511) is less than or equal to the cross-sectional area of ​​the primary brake block (521); a spring (6) is connected between the secondary drive block (512) and the primary drive block (511); and the compression stroke of the spring (6) is greater than the sum of the lengths of a protruding portion of the primary drive block (511) and a protruding portion of the primary brake block (521); The primary driving block (511), the secondary driving block (512), the primary braking block (521) and the secondary braking block (522) are all arranged in the form of rectangular parallelepipeds; the push rod (43) is rotatably connected to the base (41), and the rotation axis is vertically arranged at the middle position of its own length direction; one end of the push rod (43) close to the guide rail (3) contacts the end surface of the active slider (51) away from the driven slider, and the other end is connected to the speed limit rope (2), and the end of the push rod (43) that contacts the active slider (51) is arranged above the center line of the active slider (51).

2. A high stability elevator safety clamp according to claim 1, characterized in that: The thicknesses of the primary driving block (511), the secondary driving block (512), the primary braking block (521), and the secondary braking block (522) are set to be equal.

3. A high stability elevator safety clamp according to claim 2, characterized in that: The cross-sectional area of ​​the primary driving block (511) is set to be equal to the cross-sectional area of ​​the primary braking block (521).

4. A high stability elevator safety clamp according to claim 2, characterized in that: The cross-sectional area of ​​the secondary driving block (512) is set to be equal to the cross-sectional area of ​​the secondary braking block (522).

5. A high stability elevator safety clamp according to claim 4, characterized in that: The secondary brake block (522) is covered with a rubber layer (7) on one side surface close to the guide rail (3).

6. A high stability elevator safety clamp according to claim 1, characterized in that: One end of the push rod (43) close to the guide rail (3) is provided with an arc surface (8) that contacts the active sliding block (51).

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