Elevator with limiting lifting mechanism

Abstract

The elevator with the limiting and lifting mechanism comprises an upper beam assembly, the lifting mechanism and a limiting assembly, the upper beam assembly comprises two upper beams, each upper beam comprises a bottom plate, a side plate and a bent edge, and a notch is formed in one end of each bent edge. The limiting assembly comprises a limiting block and a limiting bolt set, the limiting block comprises a fixing part, an installation part and a force transmission part, the limiting block is fixed to the upper beam through the fixing part, the installation part extends forwards from the upper end of the fixing part, a notch is formed in the lower left end of the fixing part, and the force transmission part extends into the notch and is attached to the left side face of the bent edge. The limiting bolt set is installed on the installation part with the head facing downwards, and the free end of the speed limiter lifting arm is located below the limiting bolt set. Through the structural design of the limiting piece, the strength of the limiting piece is improved, meanwhile, force is partially transmitted to the upper beam assembly, the situation that the limiting piece is damaged due to isolated stress is avoided, the limiting assembly can stably stop the speed governor lifting arm at the setting position, and therefore the rotating amplitude of the speed governor lifting arm is reduced, and a locating pin is prevented from being snapped.

Description

Technical Field

[0001] The utility model belongs to the field of lifting elevators, and in particular relates to an elevator with a position-limiting lifting mechanism. Background Art

[0002] According to the linkage test requirements of Annex A, Section A1.3.4.3 of the "TSG T7001-2023 Rules for Elevator Supervision Inspection and Periodic Inspection", for elevators using progressive safety clamps, when conducting a speed limiter-safety clamp linkage test, the car needs to be loaded with a load of 125% of the rated load and braked at the rated speed to observe whether the speed limiter and safety clamps are reliable. In general, the safety clamp can effectively stop the elevator. However, in the following situations, the safety clamp may not be able to stop the elevator in time: First, when the elevator guide rails are not cleaned or the cleaning does not meet the requirements, although the safety clamp can effectively clamp the guide rails, the car may continue to slide due to the presence of oil on the guide rails; second, the clamp block of the safety clamp cannot clamp the guide rails due to a fault. When the safety clamp cannot stop the elevator in time and the elevator speed exceeds the action speed set by the speed limiter, or the suspension rope is broken or loose, the safety clamp lifting mechanism will actively pull the safety clamp to stop the car urgently and clamp it on the guide rail.

[0003] The safety clamp lifting mechanism includes a speed limiter lifting arm, a linkage rod, a safety clamp lifting arm and a connecting rod, wherein the speed limiter lifting arm is connected to the speed limiter wire rope. When the elevator goes down overspeed and causes the speed limiter to lock, the speed limiter lifting arm drives the linkage rod to rotate under the action of the speed limiter wire rope, the linkage rod drives the connecting rod to rotate, and the connecting rod drives the safety clamp lifting arm to lift and hold the clamp block of the safety clamp, thereby braking the car. After the clamp block of the safety clamp is held tightly, the speed limiter lifting arm stops rotating.

[0004] The lifting mechanism of the above structure was found in use that when the elevator speed is high, the positioning pins between the lifting arm of the speed limiter and the linkage rod will be directly broken, which poses a very large safety hazard. It will cause the test to fail during the test phase, and it is necessary to reissue parts and re-test (time-consuming and labor-intensive). Therefore, it is necessary to develop an elevator passenger elevator with a limit lifting mechanism. Utility Model Content

[0005] The utility model aims to provide an elevator with a position-limiting lifting mechanism, so as to solve the technical problem in the prior art that a positioning pin between a safety clamp lifting arm and a linkage rod will be directly pulled off when the passenger elevator decelerates quickly.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An elevator with a limit lifting mechanism, comprising an upper beam assembly, a lifting mechanism and a limit assembly. The upper beam assembly includes two upper beams. The cross-sectional shapes of the two upper beams are both trough-shaped and their openings are arranged back to back. The upper beam includes a bottom plate, a side plate and a bent edge. A notch is provided at one end of the bent edge close to the lifting mechanism.

[0008] The limit assembly includes a limit block and a limit bolt group. The limit block includes a fixing part, a mounting part and a force transmission part. The limit block is fixed on the upper beam through the fixing part. The mounting part extends forward from the upper end of the fixing part. A notch is provided at the lower left end of the fixing part. The force transmission part extends backward from the lower left part of the fixing part and is located on the right side of the notch. The force transmission part extends into the notch and its right side is attached to the left side of the bent edge.

[0009] The limit bolt group is installed on the mounting part with its head facing down. The lifting mechanism includes a speed limiter lifting arm. The free end of the speed limiter lifting arm is located below the limit bolt group and is blocked by the limit bolt group when it rotates upward to the in-place position.

[0010] Further, the head of the limit bolt group is semi-circular.

[0011] Further, a bolt through-hole is provided on the mounting part. The limit bolt group includes a bolt, a first nut and a second nut. The first nut and the second nut cooperate to lock the bolt on the mounting part. There are two first nuts and both are located above the fixing part. The second nut is located below the fixing part.

[0012] Further, the limit block further includes a reinforcing rib. The reinforcing rib is arranged between the fixing part and the mounting part. The limit bolt group is located on the left side of the reinforcing rib.

[0013] Further, the limit assembly further includes a fixing bolt group. The fixing part is fixed on the bent edge through the fixing bolt group. The rear side of the fixing part is attached to the front side of the bent edge.

[0014] Further, the fixing bolt group is located on the right side of the reinforcing rib.

[0015] Further, the fixing part is a fixing plate, the mounting part is a mounting plate, and the force transmission part is a force transmission plate, and the fixing plate, the mounting plate and the force transmission plate are integrally formed.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] The utility model installs a limiting component on the upper beam assembly of the elevator. After the speed limiter lifting arm rotates upward to the in-place position triggered by the elevator falling at an excessive speed, it can be blocked by the limiting component, reducing the rotation amplitude of the speed limiter lifting arm. Thus, the impact force after the speed limiter lifting arm is braked can be reduced, and the positioning pin between the speed limiter lifting arm and the linkage rod can be prevented from being broken. By adjusting the height of the limiting bolt group in the up-and-down direction, it can be ensured that when the speed limiter lifting arm is blocked, the safety gear is fully triggered. Through the structural design of the limiting part, while improving the strength of the limiting part, part of the force is transmitted to the upper beam assembly, avoiding the damage of the limiting part due to isolated stress, so that the limiting component can stably block the continuous upward rotation of the speed limiter lifting arm at the set position.

[0018] Further, when the height between the speed limiter lifting arm and the limiting bolt group deviates from the calculated value due to a series of reasons such as errors under actual working conditions, the height between the speed limiter lifting arm and the limiting bolt group can be finely adjusted through the limiting bolt group.

[0019] Further, the limiting component in the utility model is installed on the upper beam assembly, which is particularly suitable for the situation where the pit is relatively deep and it is not convenient to carry out maintenance construction from the bottom. The construction and adjustment of the limiting component can be carried out on the car top and the maintenance is relatively convenient. Description of the Drawings

[0020] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model and do not constitute a limitation to the utility model. In the drawings:

[0021] Figure 1 is a partial structural schematic diagram of an elevator with a limiting lifting mechanism of the utility model;

[0022] Figure 2 is Figure 1 the top view of

[0023] Figure 3 is Figure 1 the side view of

[0024] Figure 4 is a partial enlarged schematic diagram at A;

[0025] Figure 5 is a partial enlarged schematic diagram at B in the figure;

[0026] Figure 6 is the structural schematic diagram of the limiting component;

[0027] Figure 7 is Figure 6 the side view of

[0028] In the figure: 10. Upper beam assembly; 11. Upper beam; 12. Bottom plate; 13. Side plate; 14. Bending edge; 15. Notch;

[0029] 20. Lifting mechanism; 21. Governor lifting arm; 22. Linking rod; 23. Safety gear lifting arm

[0030] 30. Limiting component; 31. Limiting block; 32. Fixed bolt group; 33. Limiting bolt group; 311. Fixed part; 312. Mounting part; 313. Force transmission part; 314. Reinforcing rib; 331. First nut; 332. Second nut; 333. Bolt Detailed implementation manner

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention

[0032] The present invention will be further described in detail below with reference to the embodiments

[0033] An embodiment of an elevator with a limiting lifting mechanism provided by the present invention

[0034] The specific structure of an elevator with a limiting lifting mechanism is as Figures 1 to 7 shown, including an upper beam assembly 10, a lifting mechanism 20 mounted on the upper beam assembly, and a limiting component 30. The lifting mechanism 20 includes a governor lifting arm 21, a linking rod 22, and a safety gear lifting arm 23. The safety gear lifting arm 23 and the linking rod 22 are fixed against rotation by a positioning pin, and the governor lifting arm 21 and the linking rod 22 are also fixed against rotation by a positioning pin

[0035] The limiting component 30 is fixed on the upper beam assembly 10. The free end A of the governor lifting arm 21 is located above the upper beam assembly 10. When the elevator falls rapidly due to overspeed, the governor lifting arm 21 is pulled upward by the governor wire rope. When its free end A rotates upward around the center line of the linking rod 22 until it is blocked by the limiting component 30, the safety gear lifting arm 23 will be fully triggered to clamp the safety gear block, realizing the braking of the car

[0036] The upper beam assembly 10 includes two upper beams 11 with their openings facing away from each other. The cross-sectional shape of the upper beam 11 is a trough shape, including a bottom plate 12, side plates 13, and bending edges 14. The free ends of the two bending edges 14 both extend inward, and a bolt through-hole adapted to the bolt is provided on the upper bending edge 14. The left end of the bending edge 14 does not extend to the end of the side plate 13, so a notch 15 is left at the left end of the bending edge 14

[0037] The limiting component 30 includes a limiting block 31, a set of fixing bolts 32 and a set of limiting bolts 33. The limiting block 31 includes a fixing portion 311, a mounting portion 312, a force transmission portion 313 and a reinforcing rib 314. Two first bolt through-holes 315 are formed in the fixing portion 311. The set of fixing bolts passes through the first bolt through-holes 315 and the mating bolt through-holes to fix the limiting block 31 to the upper beam assembly 10, and the rear side surface of the fixing portion 311 abuts against the front plane of the bending edge 14. The mounting portion 312 extends forward from the upper end of the fixing portion 311, and a second bolt through-hole is formed therein. The set of limiting bolts 33 is fixed to the mounting portion 312 through the second bolt through-hole. The left lower part of the fixing portion 311 extends backward to form the force transmission portion 313.

[0038] The reinforcing rib 314 is arranged between the fixing portion 311 and the mounting portion 312. The set of limiting bolts 33 is located on the left side of the reinforcing rib 314, and the set of fixing bolts is located on the right side of the reinforcing rib 314. The reinforcing rib 314 serves to increase the strength of the limiting block 31 and prevent the limiting block 31 from deforming due to excessive force.

[0039] After the limiting component 30 is installed on the upper beam assembly 10, the two first bolt through-holes 315 extend along the length direction of the upper beam assembly 10, and the force transmission portion 313 extends backward into the notch 15. At the same time, the right side surface of the force transmission portion 313 abuts against the left end surface of the bending edge 14. Therefore, the force on the limiting block 31 can be transmitted to the upper beam assembly 10 through the force transmission portion 313, minimizing the shear force on the set of fixing bolts 32.

[0040] In this embodiment, the fixing portion 311, the mounting portion 312 and the force transmission portion 313 are all plate-shaped and integrally formed, which can further increase the strength of the limiting block.

[0041] The set of limiting bolts 33 includes a first nut 331, a second nut 332 and a bolt 333. Both the first nut 331 and the second nut 332 are sleeved on the bolt 333, and the bolt 333 is installed on the limiting block 31 with its head facing downwards. There are two first nuts 331 in total. After the limiting component 30 is installed, both first nuts 331 are located above the fixing portion 331; the second nut 332 is located below the fixing portion 331. By adjusting the positions of the first nut 331 and the second nut 332 on the bolt 333, the height of the head of the bolt 333 can be adjusted, thereby adjusting the upward rotation stroke when the speed limiter lifting arm 21 is triggered. The cooperation of the first nut 331 and the second nut 332 can lock the position of the bolt 333 and prevent the height of the head of the bolt 333 from deviating from the set value due to thread slippage.

[0042] In this embodiment, the head shape of the bolt 333 is semi-circular, which can ensure that it can still effectively contact the speed limiter lifting plate 21 after the height is adjusted according to the on-site situation, avoiding the occurrence of force blind spots on the bolt 333.

[0043] The linkage rod 22 is rotatably mounted on the bottom plates 12 of two sets of upper beams 11, and the speed limiter lifting arm 21 is mounted on the part of the linkage rod 22 extending from the bottom plate 12. Therefore, the limit bolt set 33 mounted on the upper bending edge 14 corresponds to the speed limiter lifting arm 21 in the up and down direction, and can limit the speed limiter lifting arm 21.

[0044] The calculated value of the height difference between the speed limiter lifting arm 21 and the limit bolt set 33 is obtained by calculation under ideal conditions. In the actual process, affected by a series of factors such as machining accuracy and installation accuracy, the height difference between the speed limiter lifting arm 21 and the limit bolt set 33 needs to be finely adjusted near the calculated value during actual installation. The specific method of fine adjustment is to adjust the height of the bolt 33 by adjusting the first nut 331 and the second nut 332, and determine the specific fixing position of the bolt 22 by checking the clamping force of the clamp block when the speed limiter lifting arm 21 is limited.

[0045] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator with a position-limiting lifting mechanism, characterized in that: It includes an upper beam assembly, a lifting mechanism and a limit assembly, wherein the upper beam assembly includes two upper beams, the cross-sections of the two upper beams are both groove-shaped and the openings of the two upper beams are arranged opposite to each other, the upper beam includes a bottom plate, a side plate and a bending edge, and a notch is provided at one end of the bending edge close to the lifting mechanism; The limit assembly includes a limit block and a limit bolt group, the limit block includes a fixing portion, a mounting portion and a force transmission portion, the limit block is fixed to the upper beam through the fixing portion, the mounting portion extends forward from the upper end of the fixing portion, a notch is arranged at the lower left end of the fixing portion, the force transmission portion is formed by extending backward from the lower left portion of the fixing portion and is located on the right side of the notch, the force transmission portion extends into the notch and its right side surface is in contact with the left side surface of the bending edge; The limiting bolt group is mounted on the mounting portion with its head facing downward, and the lifting mechanism comprises a speed limiter lifting arm, the free end of which is located below the limiting bolt group so as to be stopped by the limiting bolt group when it is rotated upward to a certain position.

2. An elevator with a position-limiting lifting mechanism according to claim 1, characterized in that: The head of the limiting bolt group is semicircular.

3. An elevator with a position-limiting lifting mechanism according to claim 1, characterized in that: The mounting portion is provided with a bolt through hole, and the limiting bolt group includes a bolt, a first nut and a second nut. The first nut and the second nut cooperate to lock the bolt on the mounting portion. There are two first nuts and both are located above the fixing portion, and the second nut is located below the fixing portion.

4. An elevator with a position-limiting lifting mechanism according to claim 1, characterized in that: The limiting block also includes a reinforcing rib, which is arranged between the fixing portion and the mounting portion, and the limiting bolt group is located on the left side of the reinforcing rib.

5. An elevator with a position-limiting lifting mechanism according to claim 4, characterized in that: The limiting assembly also includes a fixing bolt group, and the fixing portion is fixed to the bending edge through the fixing bolt group, and the rear side surface of the fixing portion is in contact with the front side surface of the bending edge.

6. An elevator with a position-limiting lifting mechanism according to claim 5, characterized in that: The fixing bolt group is located on the right side of the reinforcing rib.

7. An elevator with a position-limiting lifting mechanism according to any one of claims 1 to 6, characterized in that: The fixing portion is a fixing plate, the mounting portion is a mounting plate, the force transmission portion is a force transmission plate, and the fixing plate, the mounting plate and the force transmission plate are integrally formed.

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