A high performance elevator safety clamp

Abstract

The invention discloses a high-performance elevator safety clamp and relates to the technical field of elevator safety devices. Since the linkage rod is respectively connected to the ends of the driving rod and the rotating rod, and since the first rotating shaft and the second rotating shaft are arranged in the same vertical direction, the rotating trajectory of the rotating rod is similar to the rotating trajectory of the driving rod. When the safety clamp is working, the speed limit rope is pulled upward and drives the entire clamping plate to slide upward. Since the driving rod is clamped in the clamping plate, the end of the driving rod located in the clamping plate also moves upward. Therefore, at this time, the end of the rotating rod close to the guide rail moves downward accordingly, thereby driving the brake wheel to move downward and gradually conflicts with the guide rail during the sliding process. Since the clamping plate and the speed limit rope are both in the middle position, and the braking devices on both sides of the guide rail are symmetrically arranged, the brake wheels on both sides can keep synchronous movement, thereby conflicting with the guide rail at the same time, achieving a braking effect, and ensuring the braking stability of the entire safety clamp.

Description

Technical Field

[0001] The invention relates to the technical field of elevator safety devices, and in particular to a high-performance 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, since the safety clamp uses two speed limit ropes to pull the movable rods on both sides separately, it is difficult for the movable rods on both sides to maintain synchronous movement during movement, and it is also difficult for the brake wheels on both sides to conflict with the guide rails at the same time, affecting the braking effect of the entire safety clamp. Summary of the invention

[0005] The technical problem to be solved by the present invention is that since the safety clamp pulls up the movable rods on both sides separately through two speed limiting ropes, it is difficult for the movable rods on both sides to maintain synchronous movement when they are moving, and it is also difficult for the brake wheels on both sides to conflict with the guide rails at the same time, affecting the braking effect of the entire safety clamp.

[0006] In order to solve the above technical problems, the present invention provides a high-performance elevator safety clamp, comprising a body, a speed limiting rope, a guide rail and a brake device for conflicting with the guide rail, characterized in that: the brake device comprises a base symmetrically arranged on both sides of the guide rail, a rotating rod and a brake wheel for conflicting with the guide rail, a first rotating shaft for self-rotationally connecting to the body is vertically arranged on the rotating rod, and the brake wheel is rotatably connected to one end of the rotating rod close to the guide rail, and the brake device also includes a linkage device for the speed limiting rope to pull the rotating rod, the linkage device comprises a driving rod symmetrically arranged on both sides of the guide rail and parallel to the driving rod, a second rotating shaft for self-rotationally connecting to the base is vertically arranged on the driving rod, the first rotating shaft and the second rotating shaft are arranged in the same vertical direction, a linkage rod is rotatably connected between the rotating rod and the end of the driving rod away from the brake wheel, and the linkage device also includes a clamping disk for simultaneously clamping the ends of the driving rods on both sides close to the guide rail, the clamping disk is arranged at the middle position between the two driving rods, and the center of the upper end of the clamping disk is connected to the speed limiting rope.

[0007] Technical effect: when the safety clamp is working, the speed limit rope is pulled upward and drives the entire clamping plate to slide upward. Since the driving rod is clamped in the clamping plate, the end of the driving rod located in the clamping plate also moves upward, and the other end of the driving rod moves downward. Since the linkage rod is connected to the ends of the driving rod and the rotating rod respectively, and since the first rotating axis and the second rotating axis are arranged in the same vertical direction, the rotation trajectory of the rotating rod is similar to the rotation trajectory of the driving rod. Therefore, at this time, the end of the rotating rod away from the brake wheel also moves downward accordingly, and the end of the rotating rod close to the guide rail moves downward accordingly, thereby driving the brake wheel to move downward, and gradually conflicts with the guide rail during the sliding process. Since the clamping plate and the speed limit rope are in the middle position, and the braking devices on both sides of the guide rail are symmetrically arranged, the brake wheels on both sides can maintain synchronous movement, thereby conflicting with the guide rail at the same time, achieving a braking effect, and ensuring the braking stability of the entire safety clamp.

[0008] The technical solution further defined in the present invention is that: the first rotating shaft is arranged at the center position of the rotating rod.

[0009] Furthermore, the linkage rods are all arranged in the vertical direction.

[0010] In the aforementioned high-performance elevator safety clamp, the end of the driving rod on the guide rail side is provided with an arc surface that contacts the clamping plate.

[0011] The high-performance elevator safety clamp described above has a sliding groove for linear sliding of the brake wheel at one end of the rotating rod close to the brake wheel, the sliding groove is arranged along the length direction of the rotating rod, and a sliding column sliding in the sliding groove is coaxially arranged on the side of the brake wheel away from the base.

[0012] The high-performance elevator safety clamp described above has a limit bar that conflicts with itself on the side of the brake wheel away from the guide rail. The limit bars are symmetrically arranged on both sides of the guide rail, and the limit bars are slidably connected to the base along the length direction of the slide groove.

[0013] In the aforementioned high-performance elevator safety clamp, a block for contacting with the limit bar is arranged on the base, and the block is arranged at the middle position of the sliding stroke of the limit bar.

[0014] The beneficial effects of the present invention are:

[0015] (1) In the present invention, the position setting of the first rotating shaft and the second rotating shaft, as well as the position setting of the linkage rod, make the overall structure of the rotating rod and the driving rod more stable. Due to the lever principle, the brake wheel can contact the guide rail after the speed limit rope is pulled a short distance, thereby making the response speed of the safety clamp faster.

[0016] (2) In the present invention, the arrangement of the arc surface on the driving rod makes the connection between the end of the driving rod and the clamping disk tighter, so that the pulling action of the clamping disk on the driving rod is more direct and rapid, and the arrangement of the arc surface makes the interference between itself and the clamping disk smoother, thereby reducing the wear caused by long-term use and increasing the service life of the entire linkage device;

[0017] (3) In the present invention, the arrangement of the slide groove, the limit bar and the block enables the brake wheel to generate relative movement with the slide groove during the movement of the brake wheel in contact with the guide rail, thereby making the contact between the brake wheel and the guide rail smoother and preventing excessive wear of the brake wheel due to excessive friction. At the same time, the brake wheel also pushes the limit bar during the rotation process until the limit bar contacts the block. Such an arrangement enables the brake wheel to continue to slide in the slide groove by simply removing the block when the elevator resumes normal operation, thereby conveniently separating from the guide rail. At this time, the rotating rod is rotated downward to the initial position, and the entire safety clamp can work again. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the positions of the braking device and the linkage device of the present invention;

[0020] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0021] Figure 4 for Figure 2 A magnified schematic diagram of point B in the middle.

[0022] Among them: 1. main body; 2. speed limit rope; 3. guide rail; 4. braking device; 41. base; 42. rotating rod; 421. slide groove; 43. brake wheel; 431. slide column; 44. first rotating shaft; 5. linkage device; 51. driving rod; 511. arc surface; 52. second rotating shaft; 53. linkage rod; 54. clamping disk; 6. limit strip; 7. block. DETAILED DESCRIPTION

[0023] This embodiment provides a high-performance elevator safety clamp, the structure of which is as follows Figures 1 to 4 As shown, it includes a body 1, a speed limit rope 2, a guide rail 3 and a brake device 4 for contacting the guide rail 3. The brake device 4 includes a base 41, a rotating rod 42 and a brake wheel 43 symmetrically arranged on both sides of the guide rail 3. The speed limit rope 2 and the guide rail 3 are arranged at the middle position between the two bases 41. The rotating rod 42 is rotatably connected to the base 41, and the end of the rotating rod 42 on the side of the guide rail 3 is tilted downward. The rotating rod 42 is provided with a first rotating shaft 44 at the middle position along its own length direction. The first rotating shaft 44 is also vertically arranged on the rotating rod 42 and the base 41; the rotating rod 42 is rotatably connected to the brake wheel 43 at one end close to the guide rail 3, and the brake wheel 43 is used to contact the guide rail 3. A sliding column 431 is coaxially arranged on the side of the brake wheel 43 away from the base 41. A sliding groove 421 is opened at one end of the rotating rod 42 close to the guide rail 3 along its own length direction, and the sliding groove 421 allows the sliding column 431 to slide linearly inside itself.

[0024] Limiting strips 6 are symmetrically arranged on both sides of the guide rail 3, and the limiting strips 6 are slidably connected to the base 41. The limiting strips 6 are also arranged on the side of the brake wheel 43 away from the guide rail 3, and are used to interfere with the side of the brake wheel 43 away from the guide rail 3. The sliding direction of the limiting strip 6 is arranged perpendicular to the sliding direction of the brake wheel 43. The base 41 is also provided with a clamping block 7, which is used to interfere with the side of the limiting strip 6 away from the brake wheel 43, and the clamping block 7 is arranged at the middle position of the sliding stroke of the limiting strip 6.

[0025] The brake device 4 also includes a linkage device 5 arranged above the rotating rod 42, and the linkage device 5 includes a driving rod 51 symmetrically arranged on both sides of the guide rail 3, the driving rod 51 is rotatably connected to the base 41, and is arranged above the rotating rod 42 in parallel, and an arc surface 511 is arranged at one end of the driving rod 51 close to the guide rail 3, and the driving rod 51 is vertically connected to a second rotating shaft 52, and the second rotating shaft 52 is also vertically connected to the base 41, and the second rotating shaft 52 and the first rotating shaft 44 are arranged in the same vertical direction, and a linkage rod is rotatably connected between the driving rod 51 and the rotating rod 42 53, and the end of one side of the linkage rod 53 is interconnected with the end of the driving rod 51 on the side away from the guide rail 3, and the end of the other side of the linkage rod 53 is interconnected with the end of the rotating rod 42 on the side away from the guide rail 3, and the linkage rod 53 is arranged in the vertical direction; the linkage device 5 also includes a clamping plate 54, which is arranged at the middle position between the two driving rods 51, and the clamping plate 54 clamps the two driving rods 51 against the ends of the guide rail 3 at the same time, and the clamping plate 54 is in conflict with the arc surface 511 on the driving rod 51, and the center of the upper end of the clamping plate 54 is interconnected with the speed limit rope 2.

[0026] When the safety clamp is working, the speed limit rope 2 is pulled upward and drives the entire clamping plate 54 to slide upward. Since the driving rod 51 is clamped in the clamping plate 54, the end of the driving rod 51 located in the clamping plate 54 also moves upward, and the other end of the driving rod 51 moves downward. Since the linkage rod 53 is respectively connected to the end of the driving rod 51 and the rotating rod 42, and since the first rotating shaft 44 and the second rotating shaft 52 are arranged in the same vertical direction, the rotation trajectory of the rotating rod 42 is similar to the rotation trajectory of the driving rod 51. Therefore, at this time, the end of the rotating rod 42 away from the brake wheel 43 also moves downward accordingly, and the end of the rotating rod 42 close to the guide rail 3 moves downward accordingly, thereby driving the brake wheel 43 to move downward.

[0027] When the brake wheel 43 slides downward, one side gradually conflicts with the guide rail 3, and the other side gradually conflicts with the limit bar 6. When it conflicts with the limit bar 6, it does not conflict with the guide rail 3. At this time, the brake wheel 43 continues to slide, and the limit bar 6 also slides accordingly. When the brake wheel 43 conflicts with the guide rail 3, the limit bar 6 also conflicts with the block 7. Since the clamping plate 54 and the speed limit rope 2 are in the middle position, and the braking devices 4 on both sides of the guide rail 3 are symmetrically arranged, the brake wheels 43 on both sides can maintain synchronous movement, thereby conflicting with the guide rail 3 at the same time, achieving a braking effect, and ensuring the braking stability of the entire safety clamp.

[0028] After the braking is completed, the elevator still needs to work normally. First, the block 7 is removed from the base 41, and then the limit bar 6 is slid away from the brake wheel 43. At this time, the brake wheel 43 can continue to slide in the slide groove 421 in the direction away from the guide rail 3, so as to be easily separated from the guide rail 3. At this time, the rotating rod 42 is rotated downward to the initial position, and the entire safety clamp can work again.

[0029] 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-performance 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 rotating rod (42) and a brake wheel (43) for contacting the guide rail (3); a first rotating shaft (44) is vertically arranged on the rotating rod (42) for rotationally connecting to the body (1); the brake wheel (43) is rotationally connected to one end of the rotating rod (42) close to the guide rail (3); the braking device (4) also comprises a linkage device (5) for the speed limit rope (2) to pull the rotating rod (42); the linkage device (5) comprises a driving rod (51) symmetrically arranged on both sides of the guide rail (3) and parallel to the rotating rod (42). ), a second rotating shaft (52) is vertically arranged on the driving rod (51) for rotationally connecting the second rotating shaft (52) to the base (41), the first rotating shaft (44) and the second rotating shaft (52) are arranged in the same vertical direction, a linkage rod (53) is rotatably connected between the rotating rod (42) and the end of the driving rod (51) away from the brake wheel (43), and the linkage device (5) also includes a clamping plate (54) for simultaneously clamping the ends of the driving rods (51) on both sides close to the guide rail (3), the clamping plate (54) is arranged at a middle position between the two driving rods (51), and the center of the upper end of the clamping plate (54) is connected to the speed limit rope (2); The first rotating shaft (44) is arranged at the center position of the rotating rod (42); A slide groove (421) for linear sliding of the brake wheel (43) is provided at one end of the rotating rod (42) close to the brake wheel (43); the slide groove (421) is arranged along the length direction of the rotating rod (42); and a slide column (431) that slides in the slide groove (421) is coaxially arranged on the side of the brake wheel (43) away from the base (41); A limit strip (6) that contacts the brake wheel (43) is disposed on one side of the brake wheel (43) that faces away from the guide rail (3). The limit strips (6) are symmetrically disposed on both sides of the guide rail (3), and the limit strips (6) are slidably connected to the base (41) along the length direction of the slide groove (421).

2. A high performance elevator safety clamp according to claim 1, characterized in that: The linkage rods (53) are all arranged in the vertical direction.

3. A high performance elevator safety clamp according to claim 1, characterized in that: The end of the driving rod (51) close to the guide rail (3) is provided with an arc surface (511) that contacts the clamping plate (54).

4. A high performance elevator safety clamp according to claim 1, characterized in that: The base (41) is provided with a clamping block (7) for contacting the limiting strip (6), and the clamping block (7) is arranged at a middle position of the sliding stroke of the limiting strip (6).

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