A safety pawl capable of bidirectional action

Abstract

The application belongs to the field of elevator safety protection devices, and particularly relates to a safety clamp capable of bidirectional action, which comprises a rotating rod, a clamp body rotatably connected to the right end of the outer wall of the rotating rod, a safety switch arranged at the bottom end of the left surface of the clamp body, a limiting assembly arranged at the top end of the safety switch, a locking mechanism arranged on the right surface of the clamp body, and a guide rail arranged on the inner surface of the clamp body. The locking mechanism comprises a positioning assembly, the positioning assembly comprises a swing rod, the front part of the inner surface of the swing rod is fixedly connected to the right end of the outer wall of the rotating rod, and a transmission rod is fixedly installed on the middle part of the right surface of the swing rod through a fixing bolt. In the application, the cooperation of the guide groove and the bidirectional swing groove in the locking mechanism enables the brake wheel to extrude the guide rail to realize deceleration when the elevator is overspeeding in upward or downward running, solves the limitation of the traditional safety clamp in one-way braking, guarantees the safety of the elevator in different running states, and reduces the safety hidden danger.

Description

Technical Field

[0001] This application belongs to the field of elevator safety protection devices, specifically a safety clamp that can operate in both directions. Background Technology

[0002] In elevator safety protection systems, the safety clamp is a key safety component. Its function is to use the braking mechanism to generate friction with the guide rails when the elevator experiences dangerous situations such as overspeeding or falling, so that the elevator car can stop moving quickly and safely, thereby ensuring the safety of passengers and the normal operation of the equipment.

[0003] With the continuous development of elevator technology, the performance requirements for safety brakes are also getting higher and higher, especially in terms of bidirectional braking capability. Traditional safety brakes often have certain limitations when dealing with different overspeed situations when the elevator is going up and down.

[0004] Traditional safety brakes are mostly unidirectional, meaning they can only brake when the elevator is going downhill at excessive speed. When the elevator is going uphill at excessive speed, their braking effect is poor or even non-existent. In actual use, such unidirectional safety brakes cannot fully guarantee the safety of the elevator under various operating conditions, posing a significant safety hazard. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies by designing a bidirectional safety brake, which solves the problem that traditional safety brakes in the prior art can only operate in one direction, have poor braking effect when going uphill at high speeds, and pose safety hazards.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A bidirectional safety clamp includes a rotating rod, a clamp body rotatably connected to the right end of the outer wall of the rotating rod, a safety switch provided at the bottom end of the left surface of the clamp body, a limit component provided at the top end of the safety switch, a locking mechanism provided on the right surface of the clamp body, and a guide rail provided on the inner surface of the clamp body.

[0008] The locking mechanism includes a positioning component, which includes a swing arm. The front part of the inner surface of the swing arm is fixedly connected to the right end of the outer wall of the rotating rod. A transmission rod is fixedly installed in the middle of the right surface of the swing arm by a fixing bolt. A slider is fixedly connected in the middle of the left surface of the swing arm. A sliding groove is formed through the middle of the right surface of the clamp body.

[0009] Preferably, the locking mechanism further includes a braking assembly, the braking assembly including a guide groove that extends through the rear end of the right surface of the swing arm, a bidirectional swing groove extending through the rear end of the right surface of the clamp body, a moving block sliding on the inner wall of the bidirectional swing groove, and a brake wheel fixedly connected to the left surface of the moving block.

[0010] Preferably, the limiting component includes a connecting block, which is disposed at the top of the safety switch. A limiting block is fixedly connected to the upper surface of the connecting block, a positioning sleeve is fixedly connected to the outer wall of the rotating rod, a positioning block is fixedly connected to the lower surface of the positioning sleeve, and a limiting groove is formed on the lower surface of the positioning block.

[0011] Preferably, the slider is slidably connected to the inner wall of the slide groove, the slide groove is arc-shaped, and the bidirectional swing groove is an arc-shaped distribution that is mirrored vertically with the center line of the clamp body as the axis.

[0012] Preferably, the clamp body, safety switch, limit component and locking mechanism are provided in two sets, and the two sets of clamp body, safety switch, limit component and locking mechanism are symmetrically distributed on the left and right with the center line of the rotating rod as the axis.

[0013] Preferably, the movable block is cylindrical, slides on the inner wall of the guide groove, and the outer wall of the movable block is in close contact with the inner walls of the guide groove and the bidirectional swing groove.

[0014] Preferably, the limiting groove is arc-shaped, and the top of the limiting block is set as an arc surface.

[0015] Preferably, the limiting block is engaged with the inner wall of the limiting groove.

[0016] This application has the following beneficial effects:

[0017] 1. This application utilizes the cooperation between the guide groove and the bidirectional swing groove in the locking mechanism to enable the brake wheel to decelerate by squeezing the guide rail when the elevator is going up or down at excessive speed. This solves the limitation of the traditional safety clamp's one-way braking, ensures the safety of the elevator under different operating conditions, and reduces safety hazards.

[0018] 2. This application, through the setting of the limit component, can ensure that the locking mechanism is in a neutral position when the safety clamp is not triggered by the engagement of the limit block and the limit groove. After being triggered, the limit can be flexibly released. Moreover, the structure is simple, easy to reset and maintain, and ensures the practicality of the safety clamp. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present application;

[0020] Figure 2 This is a schematic diagram of the clamp body and safety switch in this application;

[0021] Figure 3 This is a schematic diagram showing the disassembled components of the clamp, swing arm, and transmission rod in this application;

[0022] Figure 4 This is a schematic diagram showing the disassembled components of the clamp, lever, and slider in this application;

[0023] Figure 5 for Figure 4 A magnified view of part A in the middle;

[0024] Figure 6 for Figure 1 A magnified view of part B.

[0025] The components are as follows: 1. Rotating rod; 2. Clamp body; 3. Safety switch; 41. Swing rod; 42. Transmission rod; 43. Fixing bolt; 44. Slide groove; 45. Sliding block; 51. Guide groove; 52. Bidirectional swing groove; 53. Moving block; 54. Brake wheel; 6. Guide rail; 71. Positioning sleeve; 72. Positioning block; 73. Connecting block; 74. Limiting block; 75. Limiting groove. Detailed Implementation

[0026] like Figure 1-3 As shown, a bidirectional safety clamp is used in this technical solution for elevators. It includes a rotating rod 1 for connecting the device, which connects the left and right clamp bodies 2. The right end of the outer wall of the rotating rod 1 is rotatably connected to the clamp body 2, which is connected to the guide rail 6 and provides a support frame for the other components. A safety switch 3 is provided at the bottom of the left surface of the clamp body 2. The safety switch 3 is a trigger switch (with a built-in sensor) that is triggered according to the speed of longitudinal movement. This is prior art and can be implemented by those skilled in the art. The top of the safety switch 3 is provided with a limit component to ensure that the locking mechanism is in a neutral position before being triggered. The right surface of the clamp body 2 is provided with a locking mechanism that squeezes the guide rail 6 to achieve deceleration. The inner surface of the clamp body 2 is provided with the guide rail 6, which is part of the elevator.

[0027] like Figure 3-5As shown, the locking mechanism includes a positioning assembly, which includes a swing arm 41. The front part of the inner surface of the swing arm 41 is fixedly connected to the right end of the outer wall of the rotating rod 1. The swing arm 41 can swing about the center point of the rotating rod 1 as an axis, and the rotating rod 1 can rotate. A transmission rod 42 is fixedly installed on the middle part of the right surface of the swing arm 41 by a fixing bolt 43. The swing arm 41 and the transmission rod 42 move synchronously. The transmission rod 42 is connected to the elevator's speed governor (not shown). The speed governor is one of the safety control components in the elevator safety protection system. When the elevator car overspeeds for any reason during operation, the speed governor will trigger a safety trip. The clamp stops the car. A slider 45 is fixedly connected to the middle of the left surface of the swing arm 41. A groove 44 is opened through the middle of the right surface of the clamp body 2. The slider 45 and the groove 44 fit together. The locking mechanism also includes a braking assembly. The braking assembly includes a guide groove 51. The guide groove 51 is opened through the rear end of the right surface of the swing arm 41, and the front-to-back span of the guide groove 51 is greater than its vertical span. A bidirectional swing groove 52 is opened through the rear end of the right surface of the clamp body 2. A moving block 53 slides on the inner wall of the bidirectional swing groove 52. A brake wheel 54 is fixedly connected to the left surface of the moving block 53. When the moving block 53 moves, it will drive the brake wheel 54 to move synchronously.

[0028] like Figure 3-5 As shown, slider 45 is slidably connected to the inner wall of slide groove 44. Slide groove 44 is arc-shaped, and slider 45 can swing about the center of rotating rod 1 as the origin. When swinging, it will move along the trajectory of slide groove 44. Bidirectional swing groove 52 is set as an arc shape distributed vertically and horizontally with the center line of clamp body 2 as the axis. When swing rod 41 swings, it will drive guide groove 51 to squeeze moving block 53. Moving block 53 will move along the trajectory of bidirectional swing groove 52. When moving block 53 moves up or down, it will generate a backward displacement, which will drive brake wheel 54 to squeeze guide rail 6 to achieve deceleration. And because it is set as a vertically and horizontally mirrored axis with the center line of clamp body 2 as the axis, The distribution is arc-shaped, so whether the elevator falls or rises above a certain speed, it will brake, ensuring practicality. The bidirectional swing groove 52 clamp body 2, safety switch 3, limit component and locking mechanism are all provided in two sets. The two sets of clamp bodies 2, safety switch 3, limit component and locking mechanism are symmetrically distributed on the left and right with the center line of the rotating rod 1 as the axis. The moving block 53 is set as a column. The moving block 53 slides on the inner wall of the guide groove 51. The outer wall of the moving block 53 is in close contact with the inner wall of the guide groove 51 and the bidirectional swing groove 52. This ensures that when the guide groove 51 moves, it will squeeze the moving block 53 and make it move along the trajectory of the bidirectional swing groove 52.

[0029] like Figure 1 and Figure 6As shown, the limiting component includes a connecting block 73, which is located at the top of the safety switch 3. When the safety switch 3 is triggered, it pulls the connecting block 73 downward and pushes it upward when it returns to its original position. A limiting block 74 is fixedly connected to the upper surface of the connecting block 73. A positioning sleeve 71 is fixedly connected to the outer wall of the rotating rod 1. The positioning sleeve 71 is located directly above the connecting block 73. A positioning block 72 is fixedly connected to the lower surface of the positioning sleeve 71. A limiting groove 75 is formed on the lower surface of the positioning block 72, and the limiting groove 75 and the limiting block 74 fit together.

[0030] like Figure 1 and Figure 6 As shown, the limiting groove 75 is arc-shaped, and the top of the limiting block 74 is set as an arc surface. The limiting block 74 is engaged with the inner wall of the limiting groove 75. When the positioning block 72 swings, due to the limited span of the sliding groove 44 and the bidirectional swing groove 52, the positioning block 72 and the positioning sleeve 71 rotate with the rotating rod 1 at a limited angle, which makes it impossible for the limiting groove 75 and the limiting block 74 to be misaligned.

[0031] Working principle: When the elevator car moves at excessive speed, the elevator speed limiter will be triggered, and safety switch 3 will also be activated.

[0032] When safety switch 3 is activated, it will cause limit block 74 to move downward to release the tight contact with limit groove 75. At this time, rotating rod 1, positioning sleeve 71, positioning block 72 and swing rod 41 can all rotate. When the elevator speed limiter is triggered, it will drive transmission rod 42 to move up or down. When transmission rod 42 moves up or down, it will pull swing rod 41 to swing, which will drive guide groove 51 to move and squeeze moving block 53. Moving block 53 will move longitudinally along the trajectory of bidirectional swing groove 52 and will produce a backward displacement. Moving block 53 will drive brake wheel 54 to move synchronously. Brake wheel 54 will squeeze guide rail 6 to achieve deceleration.

[0033] When the elevator car returns to normal, the safety switch 3 will be activated again to push the connecting block 73 and the limit block 74 to move upward. The limit block 74 will engage in the limit groove 75. During this process, the positioning sleeve 71, the rotating rod 1, the positioning block 72 and the limit groove 75 will rotate in opposite directions, which will drive the swing rod 41 and the transmission rod 42 to move in opposite directions to achieve restoration, so as to facilitate normal use in the future.

Claims

1. A bidirectional safety clamp, comprising a rotating rod (1), characterized in that: The right end of the outer wall of the rotating rod (1) is rotatably connected to the clamp body (2). The bottom end of the left surface of the clamp body (2) is provided with a safety switch (3). The top end of the safety switch (3) is provided with a limit component. The right surface of the clamp body (2) is provided with a locking mechanism. The inner surface of the clamp body (2) is provided with a guide rail (6). The locking mechanism includes a positioning component, which includes a rocker arm (41). The front part of the inner surface of the rocker arm (41) is fixedly connected to the right end of the outer wall of the rotating rod (1). A transmission rod (42) is fixedly installed in the middle of the right surface of the rocker arm (41) by a fixing bolt (43). A slider (45) is fixedly connected in the middle of the left surface of the rocker arm (41). A groove (44) is opened through the middle of the right surface of the clamp body (2).

2. The bidirectional safety clamp according to claim 1, characterized in that: The locking mechanism also includes a braking assembly, which includes a guide groove (51) that extends through the rear end of the right surface of the swing arm (41). A bidirectional swing groove (52) extends through the rear end of the right surface of the clamp body (2). A moving block (53) slides on the inner wall of the bidirectional swing groove (52). A brake wheel (54) is fixedly connected to the left surface of the moving block (53).

3. A bidirectional safety clamp according to claim 1, characterized in that: The limiting component includes a connecting block (73), which is located at the top of the safety switch (3). A limiting block (74) is fixedly connected to the upper surface of the connecting block (73). A positioning sleeve (71) is fixedly connected to the outer wall of the rotating rod (1). A positioning block (72) is fixedly connected to the lower surface of the positioning sleeve (71). A limiting groove (75) is formed on the lower surface of the positioning block (72).

4. A bidirectional safety clamp according to claim 2, characterized in that: The slider (45) is slidably connected to the inner wall of the slide groove (44), the slide groove (44) is set in an arc shape, and the bidirectional swing groove (52) is set in an arc shape with the center line of the clamp body (2) as the axis and distributed vertically in a mirror image.

5. A bidirectional safety clamp according to claim 1, characterized in that: The clamp body (2), safety switch (3), limit component and locking mechanism are all provided in two sets, and the two sets of clamp body (2), safety switch (3), limit component and locking mechanism are symmetrically distributed on the left and right with the center line of the rotating rod (1) as the axis.

6. A bidirectional safety clamp according to claim 2, characterized in that: The movable block (53) is configured as a column, and the movable block (53) slides on the inner wall of the guide groove (51). The outer wall of the movable block (53) is in close contact with the inner wall of the guide groove (51) and the bidirectional swing groove (52).

7. A bidirectional safety clamp according to claim 3, characterized in that: The limiting groove (75) is arc-shaped, and the top of the limiting block (74) is set as an arc surface.

8. A bidirectional safety clamp according to claim 3, characterized in that: The limiting block (74) is engaged with the inner wall of the limiting groove (75).

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