Wear-resistant elevator safety gear

Abstract

The application belongs to the technical field of elevator safety clamps, and discloses a wear-resistant elevator safety clamp, which comprises a shell, a limiting plate is slidably connected in the shell, adjusting bolts are fixedly connected to the ends of the limiting plates away from each other, buffer springs are fixedly connected to the ends of the limiting plates close to each other, fixed wedge blocks are movably connected in the shell, and sliding limiting blocks are slidably connected to the outer sides of the fixed wedge blocks. The application has the advantages that the reset assembly can automatically reset the brake wedge block, the friction rotating wheel is used to rotate by friction with the guide rail, the reset sliding block is driven to move downwards by the friction rotating wheel through the gear and the teeth, the brake wedge block is driven to move downwards by the reset sliding block, the adjusting assembly is used to adjust the friction surface, the sliding rod slides downwards from the first sliding groove when the brake wedge block is reset, the limiting baffle enters the second sliding groove, and the brake wedge block is driven to move.

Description

Technical Field

[0001] This invention belongs to the field of elevator safety clamp technology, specifically a wear-resistant elevator safety clamp. Background Technology

[0002] The safety brake is a safety protection device for elevators. Under the operation of the speed governor, when the elevator speed exceeds the speed limit (or rated speed) set by the speed governor, or in the event of a broken or slack suspension rope, the safety brake device will bring the car to an emergency stop and clamp it onto the guide rails. It provides effective protection for the safe operation of the elevator and is generally installed on the car frame or counterweight frame. Safety brakes are divided into unidirectional and bidirectional safety brakes, but due to the complexity of the manufacturing process, bidirectional safety brakes are not yet widely used in China. The working principle of the safety brake is as follows: the safety brake lever drives the speed governor wire rope, and the tensioning wheel maintains the friction between the speed governor wire rope and the speed governor wheel, ensuring that the speed governor wheel speed is consistent with the car's running speed. When the car (safety brake, safety brake lever, speed governor wire rope, speed governor wheel) running speed is ≥115% of the rated speed, the speed governor activates, and the brake rope block presses against the speed governor wire rope, stopping its rotation and driving the safety brake lever, causing the safety brake to activate.

[0003] After the safety clamp is activated, the wedge block of the safety clamp needs to be reset before the elevator can resume normal operation. Usually, the safety clamp is reset by maintenance workers who tap the wedge block downwards to release it from the guide rail and reset the safety clamp. This method is not only cumbersome to operate, but also poses certain safety hazards. Furthermore, the wedge block in the safety clamp will wear down after friction, which will reduce the braking effect. Therefore, a wear-resistant elevator safety clamp is proposed. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a wear-resistant elevator safety clamp, which has the advantages of convenient automatic reset and replacement of the braking friction surface.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant elevator safety clamp, comprising a housing, wherein a limit plate is slidably connected inside the housing, an adjusting bolt is fixedly connected to the ends of the limit plates that are far apart from each other, and a buffer spring is fixedly connected to the ends of the limit plates that are close to each other, a fixed wedge is movably connected inside the housing, a sliding limit block is slidably connected to the outside of the fixed wedge, a brake wedge is slidably connected between the sliding limit blocks, a reset assembly is provided on the top of the housing, an adjusting assembly is movably connected to the rear end of the brake wedge, and a speed governor wire rope is fixedly connected to the top of the brake wedge.

[0006] Preferably, the adjusting bolt passes through the housing and extends to the outer surface of the housing, and the ends of the buffer springs that are close to each other are respectively fixedly connected to the fixed wedge.

[0007] Preferably, the fixed wedge is located between the buffer spring and the sliding limit block, the brake wedge is movably connected inside the housing, the brake wedge cooperates with the fixed wedge, and the speed limiter wire rope passes through the housing and extends to the outside of the housing.

[0008] Preferably, the reset assembly includes a limiting groove and a reset slider. The limiting groove is formed on the inner wall of the housing and is slidably connected to a friction wheel. Gears are fixedly connected to both ends of the friction wheel, and teeth are formed at one end of the reset slider.

[0009] Preferably, the reset slider is slidably connected to the housing, the reset slider is located below the friction wheel, the top of the reset slider is inclined and abuts against the friction wheel, and the gear is meshed with the teeth.

[0010] Preferably, the adjusting assembly includes a slide rod rotatably connected to the brake wedge, a tension spring surrounding the outer side of the slide rod, a first slide groove and a second slide groove being provided on the inner wall of the housing, a limit baffle being rotatably connected to the inner wall of the housing, and a reset spring being fixedly connected to the inner wall of the housing.

[0011] Preferably, one end of the tension spring is fixedly connected to the slide rod, and the other end is fixedly connected to the brake wedge, with the tension spring located on both sides of the brake wedge.

[0012] Preferably, the slide rod is slidably connected in the first slide groove, the first slide groove and the second slide groove are interconnected, the limiting baffle is located in the middle of the first slide groove and abuts against the reset spring.

[0013] Preferably, when the brake wedge moves the slide rod upward, the slide rod slides upward in the first slide groove, the slide rod pushes the limiting baffle to squeeze the reset spring, and the reset spring rebounds to push the limiting baffle to reset.

[0014] Preferably, when the brake wedge pushes the reset slider upward, the reset slider squeezes the friction wheel to slide within the limiting groove, and the gear meshes with the teeth.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention features a reset component that automatically resets the brake wedge. The friction wheel rotates by friction with the guide rail, and the friction wheel pushes the reset slider downwards via gears and teeth. In turn, the reset slider pushes the brake wedge downwards to release the lock.

[0016] This invention has the advantage of being able to adjust the friction surface by setting an adjustment component. When the brake wedge is reset, the slide rod slides down from the first slide groove and enters the second slide groove through the limiting baffle, which drives the brake wedge to move and move the unworn brake surface to the guide rail to ensure the braking effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a partial sectional view of the side of the present invention; Figure 6 for Figure 5 Enlarged view at point B in the middle; Figure 7 This is a side sectional view of the present invention.

[0018] In the diagram: 1. Outer shell; 2. Limiting plate; 3. Adjusting bolt; 4. Buffer spring; 5. Fixed wedge; 6. Sliding limiting block; 7. Braking wedge; 8. Reset assembly; 801. Limiting groove; 802. Reset slider; 803. Friction wheel; 804. Gear; 805. Tooth; 9. Adjusting assembly; 901. Slide rod; 902. Tension spring; 903. First slide groove; 904. Second slide groove; 905. Limiting baffle; 906. Reset spring; 10. Speed ​​limiter wire rope. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 7As shown, this invention provides a wear-resistant elevator safety clamp, including a housing 1. A limit plate 2 is slidably connected inside the housing 1. Adjusting bolts 3 are fixedly connected to the ends of the limit plates 2 that are far apart from each other, and buffer springs 4 are fixedly connected to the ends of the limit plates 2 that are close together. A fixed wedge 5 is movably connected inside the housing 1. A sliding limit block 6 is slidably connected to the outside of the fixed wedge 5. A braking wedge 7 is slidably connected between the sliding limit blocks 6. A reset assembly 8 is provided at the top of the housing 1. An adjusting assembly 9 is movably connected to the rear end of the braking wedge 7. 7. A speed limiter wire rope 10 is fixedly connected to the top. The speed limiter wire rope 10 pulls the brake wedge 7 upward. The brake wedge 7 slides inward between the sliding limit blocks 6 and rubs against the guide rail for braking. At the same time, the sliding limit blocks 6 are squeezed by the brake wedge 7 and move to both sides to avoid breakage due to excessive impact force. Meanwhile, the brake wedge 7 drives the slide rod 901 to move upward. During the upward sliding of the slide rod 901 in the first slide groove 903, the slide rod 901 will push the limit baffle 905 to flip upward and squeeze the reset spring 906. When the slide bar 901 releases its pressure on the limit baffle 905, the reset spring 906 rebounds and pushes the limit baffle 905 back to its original position. Simultaneously, the brake wedge 7 pushes the reset slider 802 upwards, causing the reset slider 802 to press the friction wheel 803 into the limit groove 801, making the gear 804 mesh with the teeth 805 and the friction wheel 803 abut against the guide rail. When the brake wedge 7 needs to be reset, the elevator moves upwards, causing the guide rail to rub against the friction wheel 803, rotating the friction wheel 803 and thus pushing the elevator upwards. The reset slider 802 moves downward, pushing the brake wedge 7 downward inside the housing 1. Simultaneously, the friction of the brake wedge 7's guide rail also causes the brake wedge 7 to move downward inside the housing 1. Then, the tension spring 902 pulls the brake wedge 7 to both sides, separating it and releasing it from contact with the guide rail. At the same time, the slide rod 901 moves downward, sliding through the limit baffle 905 into the second slide groove 904, pulling the brake wedge 7 to change the friction surface. This ensures a smooth friction surface at the guide rail, guaranteeing the braking effect of the safety clamp. like Figure 1 and Figure 2 As shown, the adjusting bolt 3 passes through the outer shell 1 and extends to the outer surface of the outer shell 1. The ends of the buffer springs 4 that are close to each other are fixedly connected to the fixed wedges 5 respectively. By setting the adjusting bolt 3, the moving distance of the fixed wedges 5 can be adjusted. The design of the buffer springs 4 makes the fixed wedges 5 and the sliding limit blocks 6 move to both sides when the brake wedges 7 move upward, forming a certain buffer and preventing breakage.

[0021] like Figure 2As shown, the fixed wedge 5 is located between the buffer spring 4 and the sliding limit block 6, and the brake wedge 7 is movably connected inside the housing 1. The brake wedge 7 and the fixed wedge 5 cooperate with each other. The speed limiter wire rope 10 passes through the housing 1 and extends to the outside of the housing 1. By setting the fixed wedge 5, the fixed wedge 5 squeezes the brake wedge 7 inward, so that the brake wedge 7 rubs against the guide rail to brake. The speed limiter wire rope 10 is fixedly connected to the top of the brake wedge 7. The speed limiter wire rope 10 pulls the brake wedge 7 to move upward, producing a braking effect.

[0022] like Figure 3 and Figure 4 As shown, the reset assembly 8 includes a limiting groove 801 and a reset slider 802. The limiting groove 801 is formed on the inner wall of the outer shell 1. The limiting groove 801 is slidably connected to a friction wheel 803. Gears 804 are fixedly connected to both ends of the friction wheel 803. One end of the reset slider 802 is provided with teeth 805. By setting the reset assembly 8, the brake wedge 7 can be automatically reset. The friction wheel 803 rubs against the guide rail, and the guide rail drives the friction wheel 803 to rotate. Then, through the cooperation of the gears 804 and teeth 805, the reset slider 802 is pushed to move downward, pushing the brake wedge 7 to move downward inside the outer shell 1, so that the brake wedge 7 releases its contact with the guide rail. At the same time, the reset slider 802 slides to the lower end of the limiting groove 801 under the action of gravity.

[0023] like Figure 4 As shown, the reset slider 802 is slidably connected to the housing 1. The reset slider 802 is located below the friction wheel 803. The top of the reset slider 802 is inclined and abuts against the friction wheel 803. The gear 804 and the teeth 805 are meshed. By setting the reset slider 802 to be slidably connected to the housing 1, it is convenient for the brake wedge 7 to push the reset slider 802 to move. Setting the top of the reset slider 802 to be inclined and abutting against the friction wheel 803 makes it convenient for the reset slider 802 to push the friction wheel 803 to move, and also facilitates the meshing of the gear 804 and the teeth 805.

[0024] like Figure 5 and Figure 6As shown, the adjusting assembly 9 includes a slide rod 901 rotatably connected to the brake wedge 7. A tension spring 902 surrounds the outer side of the slide rod 901. A first slide groove 903 and a second slide groove 904 are formed on the inner wall of the outer shell 1. A limit baffle 905 is rotatably connected to the inner wall of the outer shell 1. A reset spring 906 is fixedly connected to the inner wall of the outer shell 1. One end of the tension spring 902 is fixedly connected to the slide rod 901, and the other end is fixedly connected to the brake wedge 7. The tension spring 902 is located on both sides of the brake wedge 7. The slide rod 901 is slidably connected in the first slide groove 903. The first slide groove 903 and the second slide groove 904 are interconnected. The limit baffle 905 is located in the middle of the first slide groove 903 and is fixedly connected to the brake wedge 7. The spring 906 abuts against the guide rail. By setting the adjustment component 9, the slide rod 901 can drive the brake wedge 7 to move inward, remove the worn surface, and move the intact friction surface to the guide rail. The design of the slide rod 901 makes it easy for the slide rod 901 to slide from the first slide groove 903 to the second slide groove 904, driving the brake wedge 7 to move. By setting the limiting baffle 905, the slide rod 901 can be easily slid into the second slide groove 904, and the reset spring 906 abuts against the limiting baffle 905, which can facilitate the reset of the limiting baffle 905. By setting the tension spring 902, the brake wedge 7 can be prevented from rubbing against the guide rail when it is not in use.

[0025] like Figure 7 As shown, when the brake wedge 7 moves the slide rod 901 upward, the slide rod 901 slides upward in the first slide groove 903. The slide rod 901 pushes the limiting baffle 905 to squeeze the reset spring 906, and the reset spring 906 rebounds to push the limiting baffle 905 to reset. When the brake wedge 7 moves the slide rod 901 upward, the slide rod 901 slides upward in the first slide groove 903. During this process, the slide rod 901 pushes the limiting baffle 905 to deflect upward and squeezes the reset spring 906. When the slide rod 901 releases the squeeze on the limiting baffle 905, the reset spring 906 can rebound to push the limiting baffle 905 to reset. The limiting baffle 905 blocks the channel for the slide rod 901 to fall back into the first slide groove 903, and then slides into the second slide groove 904, while driving the brake wedge 7 to move.

[0026] like Figure 3 , Figure 4 and Figure 7As shown, when the brake wedge 7 pushes the reset slider 802 upward, the reset slider 802 squeezes the friction wheel 803 to slide within the limiting groove 801, and the gear 804 meshes with the teeth 805. When the brake wedge 7 pushes the reset slider 802 upward, the reset slider 802 squeezes the friction wheel 803 to slide within the limiting groove 801, so that the gear 804 meshes with the teeth 805 and the friction wheel 803 abuts against the guide rail. This allows the brake wedge 7 to be reset when it needs to be reset, by friction between the guide rail and the friction wheel 803, the friction wheel 803 is rotated, which in turn pushes the reset slider 802 downward. The reset slider 802 then pushes the brake wedge 7 downward inside the outer casing 1, thus resetting the brake wedge 7.

[0027] The working principle and usage process of this invention: During use, when braking is required, the speed limiter wire rope 10 pulls the brake wedge 7 upward. The brake wedge 7 slides inward between the sliding limit blocks 6 and rubs against the guide rail for braking. At the same time, the sliding limit blocks 6 are squeezed by the brake wedge 7 and move to both sides to avoid breakage due to excessive impact force. Simultaneously, the brake wedge 7 drives the slide rod 901 to move upward. During the upward sliding process of the slide rod 901 in the first slide groove 903, the slide rod 901 pushes the limit baffle 905 to flip upward and squeeze the reset spring 906. When the slide rod 901 releases the squeeze on the limit baffle 905, the reset spring 906 can rebound and push the limit baffle 905 to reset. At the same time, the brake wedge 7 pushes the reset slider 802 to move upward, and the reset slider 802 squeezes the friction wheel 803 in the limit... The gear 804 slides within the slot 801, meshing with the teeth 805 and the friction wheel 803 abutting against the guide rail. When the brake wedge 7 needs to be reset, the elevator moves upward, causing the guide rail to rub against the friction wheel 803, which in turn rotates the friction wheel 803, pushing the reset slider 802 downward. The reset slider 802 pushes the brake wedge 7 downward inside the housing 1. At the same time, the friction of the guide rail also causes the brake wedge 7 to move downward inside the housing 1. Then, the tension spring 902 pulls the brake wedge 7 to both sides, separating the brake wedge 7 and releasing it from the guide rail. Simultaneously, the slide rod 901 moves downward and slides into the second slide groove 904 through the limit baffle 905, pulling the brake wedge 7 to change the friction surface. The friction surface is then moved to the guide rail to ensure the braking effect of the safety clamp.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant elevator safety clamp, comprising a housing (1), characterized in that: The outer shell (1) is slidably connected to a limiting plate (2). Each of the limiting plates (2) is fixedly connected to an adjusting bolt (3) at the ends that are far apart from each other. Each of the limiting plates (2) is fixedly connected to a buffer spring (4) at the ends that are close to each other. A fixed wedge (5) is movably connected inside the outer shell (1). A sliding limiting block (6) is slidably connected to the outside of the fixed wedge (5). A brake wedge (7) is slidably connected between the sliding limiting blocks (6). A reset assembly (8) is provided on the top of the outer shell (1). An adjusting assembly (9) is movably connected to the rear end of the brake wedge (7). A speed limiter wire rope (10) is fixedly connected to the top of the brake wedge (7). The adjustment assembly (9) includes a slide rod (901) rotatably connected to the brake wedge (7), a tension spring (902) surrounding the outside of the slide rod (901), a first slide groove (903) and a second slide groove (904) being provided on the inner wall of the outer shell (1), a limit baffle (905) being rotatably connected to the inner wall of the outer shell (1), and a reset spring (906) being fixedly connected to the inner wall of the outer shell (1). One end of the tension spring (902) is fixedly connected to the slide rod (901), and the other end is fixedly connected to the brake wedge (7). The tension spring (902) is located on both sides of the brake wedge (7). The slide bar (901) is slidably connected in the first slide groove (903), the first slide groove (903) and the second slide groove (904) are interconnected, and the limiting baffle (905) is located in the middle of the first slide groove (903) and abuts against the reset spring (906); When the brake wedge (7) drives the slide rod (901) to move upward, the slide rod (901) slides upward in the first slide groove (903). The slide rod (901) pushes the limiting baffle (905) to squeeze the reset spring (906). When the slide rod (901) releases the squeezing of the limiting baffle (905), the reset spring (906) rebounds and pushes the limiting baffle (905) to reset. When it is necessary to reset the brake wedge (7), the slide rod (901) moves downward and slides into the second slide groove (904) through the limiting baffle (905).

2. The wear-resistant elevator safety clamp according to claim 1, characterized in that: The adjusting bolt (3) passes through the outer shell (1) and extends to the outer surface of the outer shell (1), and the ends of the buffer springs (4) that are close to each other are respectively fixedly connected to the fixed wedge (5).

3. The wear-resistant elevator safety clamp according to claim 1, characterized in that: The fixed wedge (5) is located between the buffer spring (4) and the sliding limit block (6). The brake wedge (7) is movably connected inside the housing (1). The brake wedge (7) cooperates with the fixed wedge (5). The speed limiter wire rope (10) passes through the housing (1) and extends to the outside of the housing (1).

4. The wear-resistant elevator safety clamp according to claim 1, characterized in that: The reset assembly (8) includes a limiting groove (801) and a reset slider (802). The limiting groove (801) is opened on the inner wall of the outer shell (1). The limiting groove (801) is slidably connected to a friction wheel (803). Gears (804) are fixedly connected to both ends of the friction wheel (803). One end of the reset slider (802) is provided with teeth (805).

5. The wear-resistant elevator safety clamp according to claim 4, characterized in that: The reset slider (802) is slidably connected to the outer shell (1). The reset slider (802) is located below the friction wheel (803). The top of the reset slider (802) is inclined and abuts against the friction wheel (803).

6. The wear-resistant elevator safety clamp according to claim 4, characterized in that: When the brake wedge (7) pushes the reset slider (802) to move upward, the reset slider (802) squeezes the friction wheel (803) to slide in the limiting groove (801), so that the gear (804) meshes with the teeth (805) and the friction wheel (803) abuts against the guide rail.

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