Elevator with limiting and pulling mechanism

Abstract

The utility model provides a kind of elevator with limiting lifting mechanism, including lower beam assembly, lifting mechanism and limiting piece, lower beam assembly includes two groups of lower beams, two groups of lower beams are all channel-shaped and its opening is set back, lifting mechanism includes linkage lever and governor lifting arm, linkage lever is rotatably installed on two groups of lower beams, governor lifting arm is installed on the part of linkage lever extending two groups of lower beams, positioning pin is arranged between linkage lever and governor lifting arm, limiting piece is installed on lower beam, limiting piece is located above the free end of governor lifting arm.The utility model limits the rotation amplitude of governor lifting arm by limiting piece, avoid governor lifting arm rotation amplitude too large and generate larger impact after being braked, so as to avoid the positioning pin between governor lifting arm and linkage lever be pulled off.Adjustable mounting position of long hole limiting block can reduce the requirement of machining precision and installation precision, and the influence of local wear of limiting block can be compensated.

Description

Technical Field

[0001] This utility model belongs to the field of lifting elevators, specifically relating to an elevator with a limiting lifting mechanism. Background Technology

[0002] According to Appendix A, Section A1.3.4.3 of the "TSG T7001-2023 Rules for Supervision and Periodic Inspection of Elevators," for elevators using progressive safety brakes, the governor-safety brake linkage test requires the car to be loaded with 125% of its rated load and braked downwards at the rated speed. The reliability of the governor and safety brake's operation is then observed. Under normal circumstances, the safety brake can effectively stop the elevator. However, in the following situations, the safety brake may fail to stop the elevator in time: First, if the elevator guide rails are not cleaned properly or the cleaning is insufficient, although the safety brake can effectively clamp the guide rails, the car may continue to slide due to the oil residue; second, the safety brake's clamping blocks may malfunction and fail to clamp the guide rails. If the safety brake fails to stop the elevator in time, causing the elevator speed to exceed the governor's set operating speed, or if the suspension rope breaks or slackens, the safety brake lifting mechanism will actively pull the safety brake, bringing the car to an emergency stop and clamping it onto the guide rails.

[0003] The safety gear lifting mechanism includes a governor lifting arm, a linkage rod, a safety gear lifting arm, and a connecting rod. The governor lifting arm is connected to the governor wire rope. When the elevator descends at excessive speed, causing the governor to seize, the governor lifting arm, under the action of the governor wire rope, drives the linkage rod to rotate. The linkage rod drives the connecting rod to rotate, and the connecting rod drives the safety gear lifting arm to lift and clamp the safety gear's clamping blocks, thereby braking the car. After the safety gear's clamping blocks are clamped, the governor lifting arm stops rotating.

[0004] During use, it was found that the lifting mechanism of the above structure could break at high speeds, as the positioning pins between the speed limiter lifting arm and the linkage rod would break directly, posing a significant safety hazard. This would lead to test failures during the experimental phase, requiring the replacement of parts and retesting (which is time-consuming and labor-intensive). Therefore, it is necessary to develop an elevator with a limit lifting mechanism. Utility Model Content

[0005] The present invention aims to provide an elevator with a limiting lifting mechanism to solve the technical problem in the prior art where the positioning pin between the speed limiter lifting arm and the linkage rod is directly broken when the elevator decelerates rapidly.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An elevator with a limiting lifting mechanism includes a lower beam assembly, a lifting mechanism mounted on the lower beam assembly, and a limiting member. The lower beam assembly includes two sets of lower beams, both of which are groove-shaped and have openings facing away from each other. The lifting mechanism includes a linkage rod and a speed governor lifting arm. The linkage rod is rotatably mounted on the two sets of lower beams. The speed governor lifting arm is mounted on the portion of the linkage rod extending out of the lower beam. A positioning pin is provided between the linkage rod and the speed governor lifting arm. The limiting member is mounted on the lower beam and is located above the free end of the speed governor lifting arm to prevent the speed governor lifting arm from continuing to rotate upward when the safety clamp is engaged.

[0008] Furthermore, the lower beam includes a base plate, side plates, and a bent edge. There are two side plates, which are located at the upper and lower ends of the base plate, respectively. The bent edge is located at the end of the corresponding side plate and is folded inward. The limiting member is installed on the upper bent edge.

[0009] Furthermore, the limiting component includes a limiting block and a bolt assembly. The lower beam has bolt through holes, and the limiting block has an elongated hole that extends along the length of the lower beam assembly. The bolt assembly passes through the elongated hole and the bolt through holes to fix the limiting block to the lower beam.

[0010] Furthermore, the limiting member includes an arcuate surface for engaging with the limiting stop of the speed limiter lifting arm.

[0011] Furthermore, the limiting member also includes a plane located above the arc surface.

[0012] Furthermore, the plane is flush with the upper end face of the lower beam.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention installs a limiting component on the lower beam of the elevator. When the elevator falls at excessive speed, the speed governor lifting arm rotates upward to the point where the safety clamp can be tightened, but is stopped by the limiting component. The limiting component restricts the rotation range of the speed governor lifting arm, preventing excessive rotation of the speed governor lifting arm and the resulting large impact after braking. This also prevents the positioning pin between the speed governor lifting arm and the linkage rod from being broken, thus improving testing efficiency and the safety performance of the elevator.

[0015] Furthermore, the limit block has elongated holes, and the limit block is fixed to the lower beam by bolts passing through these holes. Therefore, during installation, the installation position of the limit block can be adjusted according to the tightness of the clamping block, ensuring that the clamping block is fully triggered when it engages with the speed governor lifting arm's limit stop. This compensates for deviations between the actual and designed installation positions caused by errors in machining and installation accuracy, reducing the requirements for machining and installation accuracy and lowering production costs. Even after localized wear, the limit block can continue to function as a stopper for the speed governor lifting arm when it has rotated to its designated position by adjusting its installation position.

[0016] Furthermore, the lower end of the limit block is an arc surface. After the limit block is moved left and right to adjust its installation position, it can still make good contact with the speed limiter lifting arm when it is in the state of cooperating with the speed limiter lifting arm limit stop.

[0017] Furthermore, when the speed governor lifting arm moves up to its position and is blocked by the limit block, the force on the speed governor lifting arm is transferred to the lower beam assembly and the car bracket. Therefore, the limit block is not easily damaged and can reliably stop the speed governor lifting arm. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a partial structural schematic diagram of an elevator with a limiting lifting mechanism according to this utility model;

[0020] Figure 2 yes Figure 1 The front view;

[0021] Figure 3 yes Figure 1 Side view;

[0022] Figure 4 This is a structural diagram of an elevator with a limiting lifting mechanism in use according to the present invention;

[0023] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle;

[0024] Figure 6 This is a schematic diagram of the limit block structure;

[0025] In the diagram: 10. Lower beam assembly; 11. Lower beam; 12. Base plate; 13. Side plate; 14. Bending edge; 20. Lifting mechanism; 21. Speed ​​limiter lifting arm; 22. Linkage rod; 23. Safety clamp lifting arm; 30. Limiting component; 31. Limiting block; 32. Bolt assembly; 33. Long hole; 40. Car bracket. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The present invention will be further described in detail below with reference to the embodiments.

[0028] An embodiment of an elevator with a limiting lifting mechanism provided by this utility model:

[0029] The specific structure of an elevator with a limiting lifting mechanism is as follows: Figures 1 to 6 As shown, it includes a lower beam assembly 10, a lifting mechanism 20 mounted on the lower beam assembly, and a limiting member 30. The lifting mechanism 20 includes a speed limiter lifting arm 21, a linkage rod 22, and a safety gear lifting arm 23. The safety gear lifting arm 23 and the linkage rod 22 are fixed together by a positioning pin to prevent rotation. The speed limiter lifting arm 21 and the linkage rod 22 are also fixed together by a positioning pin to prevent rotation.

[0030] The limiting component 30 is fixed on the lower beam assembly 10. The free end A of the speed governor lifting arm 21 is located above the lower beam assembly 10. When the elevator falls at excessive speed, the speed governor lifting arm 21 is pulled upward by the speed governor wire rope. Its free end A rotates upward around the center line of the linkage rod 22 until it is blocked by the limiting component 30. Then the safety clamp lifting arm 23 will be fully triggered and clamp the safety clamp block to achieve car braking.

[0031] The limiting component 30 includes a limiting block 31 and a bolt assembly 32. The longitudinal section of the limiting block 31 is partially circular, including a flat surface and an arc surface, with the arc surface located below the flat surface. The limiting block 31 has an elongated hole 33 extending along the length direction of the lower beam assembly 10.

[0032] The lower beam assembly 10 includes two lower beams 11 with openings facing away from each other. The cross-sectional shape of the lower beam 11 is groove-shaped, including a base plate 12, side plates 13, and bent edges 14. The free ends of both bent edges 14 extend inward. A bolt hole is provided on the upper bent edge 14. A bolt group 32 passes through the elongated hole 33 and the bolt hole to fix the limiting block 31 to the upper bent edge 14. The linkage rod 22 is rotatably mounted on the base plate 12 of the two lower beams 11, and the speed limiter lifting arm 21 is mounted on the part of the linkage rod 22 that extends from the base plate 12. Therefore, the limiting block 31 mounted on the upper bent edge 14 corresponds to the speed limiter lifting arm 21 in the vertical direction, and can limit the speed limiter lifting arm 21.

[0033] To ensure that the safety brake can be fully triggered when the speed governor lifting arm 21 is blocked by the limiting block 31, the height difference between the speed governor lifting arm 21 and the limiting block 31 must conform to the calculated value. However, due to the limited height of the upper bent edge 14 in the lower beam 11, the installation position of the limiting block 31 is limited. In this case, the upper end surface of the limiting block 31 is machined into a plane to ensure that the upper end surface of the limiting block 31 is not higher than the lower beam 11, thus not affecting the assembly of the lower beam assembly 10 with the car. More specifically, in this embodiment, the upper plane of the limiting block 31 is at the same height as the upper end surface of the lower beam 11, so the lower end of the car bracket 40 can be supported by both the lower beam 11 and the limiting block 31 simultaneously.

[0034] The calculated value of the height difference between the speed limiter lifting arm 21 and the limit block 31 is obtained under ideal conditions. In practice, due to the influence of a series of factors such as machining accuracy and installation accuracy, the height difference between the speed limiter lifting arm 21 and the limit block 31 needs to be finely adjusted near the calculated value during actual installation. The specific fine-tuning method is to adjust the position of the limit block 31 through the elongated hole 33, and determine the specific fixed position of the limit block 31 by checking the clamping force of the clamp when the speed limiter lifting arm 21 is limited.

[0035] It should be noted that, in this document, terms such as “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.

[0036] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elevator with a position-limiting pulling mechanism, characterized by: The device includes a lower beam assembly, a lifting mechanism mounted on the lower beam assembly, and a limiting member. The lower beam assembly includes two sets of lower beams, both of which are slotted and have their openings facing away from each other. The lifting mechanism includes a linkage rod and a speed limiter lifting arm. The linkage rod is rotatably mounted on the two sets of lower beams. The speed limiter lifting arm is mounted on the portion of the linkage rod that extends out of the lower beam. A positioning pin is provided between the linkage rod and the speed limiter lifting arm. The limiting member is mounted on the lower beam and is located above the free end of the speed limiter lifting arm to prevent the speed limiter lifting arm from continuing to rotate upward when the safety clamp is engaged.

2. The elevator with a limiting and pulling mechanism according to claim 1, characterized in that: The lower beam includes a base plate, side plates, and a bent edge. There are two side plates, which are located at the upper and lower ends of the base plate, respectively. The bent edge is located at the end of the corresponding side plate and is folded inward. The limiting member is installed on the upper bent edge.

3. The elevator with a limiting and pulling mechanism according to claim 1, characterized in that: The limiting component includes a limiting block and a bolt assembly. The lower beam has bolt through holes, and the limiting block has an elongated hole that extends along the length of the lower beam assembly. The bolt assembly passes through the elongated hole and the bolt through holes to fix the limiting block to the lower beam.

4. The elevator with a limiting and pulling mechanism according to claim 3, characterized in that: The limiting component includes an arcuate surface for engaging with the limiting stop of the speed limiter lifting arm.

5. The elevator with a limiting and pulling mechanism according to claim 4, characterized in that: The limiting component also includes a plane located above the arc surface.

6. The elevator with a limiting and pulling mechanism according to claim 5, characterized in that: The plane is flush with the upper end face of the lower beam.

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