A fall protection mechanism

Abstract

The utility model discloses a kind of anti-falling mechanisms, including ring seat and clamping element, ring seat is equipped with the inner hole of upper and lower through, several clamping elements are installed in ring seat bottom, several clamping elements are evenly distributed and installed in circumference, clamping element includes first inclined seat and second inclined seat, first inclined seat is fixedly installed in ring seat bottom, second inclined seat is movably connected with first inclined seat, second inclined seat is installed towards ring seat inner hole central direction, the utility model is fixedly installed in the bottom of mechanical equipment work part, the outer wall of main shaft is clamped by several evenly distributed clamping elements in circumference, to play the effect of work part bearing and anti-falling, the utility model can effectively guarantee that equipment work part stays in specific height position, to meet the operation demand.

Description

Technical Field

[0001] This utility model relates to the field of lifting auxiliary equipment technology, and more specifically, to a fall prevention mechanism. Background Technology

[0002] Lifting structures are commonly used in some large mechanical equipment. A lifting structure generally includes a vertically fixed main shaft and a working part that guides the lifting motion. The lifting motion of the working part is used to adjust the installation height of the working part. After the working part is adjusted to a suitable height, it needs to be stably maintained at the adjusted height position. The working part of large machinery has a large load weight, which leads to the risk of instability when the working part is stopped at a certain height position (the height locking may fail due to excessive load, and the working part may fall downwards). This instability risk will cause operational safety accidents. Therefore, the company considers designing a fall protection structure to eliminate the above-mentioned instability risk, and this case arises from this. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a fall prevention mechanism. This utility model is fixedly installed at the bottom of the working part of the mechanical equipment. It clamps the outer wall of the main shaft through several circumferentially distributed clamping elements to achieve the effect of bearing the working part and preventing it from falling. This utility model can effectively ensure that the working part of the equipment stays at a specific height position.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A fall arrest mechanism includes a ring base and clamping elements. The ring base has a through-hole. A plurality of clamping elements are installed at the bottom of the ring base and are evenly distributed around the circumference. Each clamping element includes a first inclined seat and a second inclined seat. The first inclined seat is fixedly installed at the bottom of the ring base, and the second inclined seat is movably connected to the first inclined seat. The second inclined seat is installed facing the center of the inner hole of the ring base.

[0006] Furthermore, the bottom of the ring seat is provided with a notch, and each notch corresponds to the installation of one of the clamping elements. The first inclined seat of the clamping element is installed in the notch by means of bolts.

[0007] Furthermore, both the first and second inclined seats are provided with inclined surfaces, and the first and second inclined seats are installed by means of the inclined surfaces being in contact with each other.

[0008] Furthermore, the clamping element also includes a tightening bolt, and the first inclined seat and the second inclined seat are connected by the tightening bolt.

[0009] Furthermore, the first inclined seat has a threaded hole, and the tightening bolt passes through the second inclined seat and is threaded into the threaded hole.

[0010] Furthermore, a clamping block is fixedly connected to the second inclined seat. The clamping block is installed facing the center of the inner hole of the ring seat, and the clamping block is made of copper.

[0011] Furthermore, the number of clamping elements installed is four, and two symmetrically arranged lifting guide blocks are also fixedly installed at the bottom of the ring base. The lifting guide blocks are installed to avoid the clamping elements, and the lifting guide blocks are provided with protruding strips, which are set towards the center of the inner hole of the ring base.

[0012] Furthermore, an inner ring sleeve is fitted into the inner hole of the ring seat, and the inner ring sleeve is inserted from the top of the ring seat. The inner ring sleeve is made of copper.

[0013] Furthermore, a cover plate is fixedly installed on the top of the ring seat, and the cover plate is used to press and fix the inner ring sleeve.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model is fixedly installed at the bottom of the working part of the mechanical equipment. It clamps the outer wall of the main shaft with several circumferentially distributed clamping elements to achieve the effect of bearing the working part and preventing it from falling. This utility model has the advantage of good performance and can effectively ensure that the working part of the equipment stays at a specific height position.

[0016] 2. The present invention is designed to install an inner ring sleeve and a lifting guide block. The above components can form a lifting motion guide effect for the working part of the equipment, so that the lifting motion is stable and smooth. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a fall protection mechanism in this embodiment;

[0018] Figure 2 This is a bottom view of one type of fall protection mechanism in this embodiment;

[0019] Figure 3 for Figure 2 Sectional view along line AA in the middle;

[0020] Figure 4 for Figure 3 Enlarged view at point B in the image;

[0021] Figure 5 This is a schematic diagram of a fall protection mechanism applied to fire extinguishing equipment in this embodiment.

[0022] Reference numerals: ring seat 1, inner ring sleeve 2, clamping element 3, first inclined seat 31, inclined surface 311, threaded hole 312, second inclined seat 32, clamping block 33, tightening bolt 34, lifting guide block 4, protruding strip 41, cover plate 5, anti-fall mechanism 100, fire extinguishing working part 200, main shaft 300. Detailed Implementation

[0023] 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.

[0024] like Figures 1-4 The illustrated anti-fall mechanism is characterized by comprising a ring seat 1 and clamping elements 3. The ring seat 1 has a through-hole, the design of which allows the ring seat 1 to be fitted onto the outside of the main shaft 300. Several clamping elements 3 are installed at the bottom of the ring seat 1, and are evenly distributed along the circumference of the bottom surface of the ring seat 1. Preferably, four clamping elements 3 are installed, which ensures the anti-fall effect while reducing workload. The clamping elements 3 include a first inclined seat 31 and a second inclined seat 32. The first inclined seat 31... 1. Fixedly installed at the bottom of the ring base 1. The bottom of the ring base 1 has a notch, and each notch corresponds to the installation of a clamping element 3. The first inclined seat 31 of the clamping element 3 is fixed in the notch by bolts. The second inclined seat 32 is movably connected to the first inclined seat 31. Both the first inclined seat 31 and the second inclined seat 32 have inclined surfaces 311. The first inclined seat 31 and the second inclined seat 32 are installed by the inclined surfaces 311 touching each other. A clamping block 33 (fixed by screws) is fixedly connected to the second inclined seat 32. The clamping blocks 33 are installed facing the center of the inner hole of the ring seat 1. The main shaft 300 passes through the inner hole of the ring seat 1. All clamping blocks 33 can contact and clamp the main shaft 300 to achieve engagement. The clamping blocks 33 are made of copper. Copper clamping blocks 33 are relatively soft and will not damage the main shaft 300 during the clamping process. Moreover, the clamping and engagement effect is good. After all the clamping blocks 33 of the clamping elements 3 are clamped and engaged, this utility model can form an anti-fall effect. The load weight of the working part is mainly borne by this utility model. In the equipment structure, the height adjustment is generally achieved by screw drive. The screw itself has the effect of locking the height. However, in this way, the load weight of the working part of the equipment is concentrated on the threads of the screw. Over time, the screw is prone to damage, which not only affects the service life of the screw, but also causes the working part of the equipment to fall. After installing this utility model, the load weight of the working part is mainly borne by this utility model. The burden on the screw threads is greatly reduced, which can effectively protect the screw and extend the service life of the screw.

[0025] like Figure 3 and Figure 4 As shown, the clamping element 3 also includes a tightening bolt 34. The first inclined seat 31 and the second inclined seat 32 are connected by the tightening bolt 34. The first inclined seat 31 has a threaded hole 312. The tightening bolt 34 is installed from bottom to top. After passing through the second inclined seat 32, the tightening bolt 34 is threaded into the threaded hole 312. Tightening the tightening bolt 34 upwards tightens it, and tightening it downwards loosens it. Since the first inclined seat 31 and the second inclined seat 32 are installed by having their inclined surfaces 311 touching, when the tightening bolt 34... 4. When tightened upwards, the second inclined seat 32 will be pushed towards the main shaft 300, so that the clamping block 33 can contact the outer wall of the main shaft 300 to achieve clamping engagement. When it is necessary to release the clamping engagement, simply tighten the tightening bolt 34 downwards to loosen it. The second inclined seat 32 will slide down under the action of gravity and naturally move away from the main shaft 300, thus releasing the clamping. In this utility model, the diameter of the through hole of the tightening bolt 34 on the second inclined seat 32 should be larger than the outer diameter of the threaded section of the bolt, so that the second inclined seat 32 has room to move.

[0026] During the lifting and lowering movement of the working part of the equipment, it is also necessary to ensure the lifting and lowering guidance accuracy of the working part. For this reason, this utility model also includes a guide structure, such as... Figure 1 and Figure 2 As shown, this utility model also has two symmetrically arranged lifting guide blocks 4 (bolted installation) fixedly installed at the bottom of the ring seat 1. The lifting guide blocks 4 are installed to avoid the clamping element 3. The lifting guide blocks 4 are provided with a protrusion 41, which is set towards the center of the inner hole of the ring seat 1. The main shaft 300 has a groove that matches the protrusion 41. When this utility model is installed, the protrusion 41 is inserted into the groove of the main shaft 300. The lifting guide blocks 4 prevent the working part of the equipment from rotating in a plane during the movement, and can only move in a straight line, thus playing a guiding role in the lifting movement. Figure 3 As shown, the present invention has an inner ring sleeve 2 fitted into the inner hole of the ring seat 1. The inner ring sleeve 2 is tightly fitted and inserted from the top of the ring seat 1. The inner ring sleeve 2 is made of copper material, and the inner hole size of the inner ring sleeve 2 matches the diameter of the main shaft 300. The inner ring sleeve 2 prevents the working part from circumferentially swaying during the lifting and lowering process. The installation of the inner ring sleeve 2 does not affect the lifting and lowering of the working part. The above design makes the lifting and lowering movement of the working part more stable and smooth.

[0027] like Figure 3 As shown, a cover plate 5 is fixedly installed on the top of the ring seat 1. The inner diameter of the cover plate 5 is larger than the inner diameter of the inner ring sleeve 2, but smaller than the outer diameter of the inner ring sleeve 2. The cover plate 5 does not contact the outer wall of the main shaft 300, but it can be used to press and fix the inner ring sleeve 2.

[0028] Embodiment: As Figure 5 shown is a supporting fire extinguishing device for a rocket engine thrust test system. The fire extinguishing working part 200 is sleeved outside the main shaft 300. The main shaft 300 is vertically installed. The fire extinguishing working part 200 needs to be adjusted in height along the height direction of the main shaft 300 to adjust the installation height. After the installation height adjustment is in place, the fire extinguishing working part 200 needs to be fixed at a specific position without falling (the fire extinguishing working part 200 is used for the flame extinguishing operation at the tail after the rocket engine thrust test. The height of the fire extinguishing working part 200 needs to be adapted to the tail height position of the rocket engine. Therefore, it needs to be adjusted in place in advance and then work at a fixed height position). Since the fire extinguishing working part 200 has components such as pipelines, long arms, and counterweights, the self-weight of the fire extinguishing working part 200 is very large, and it is difficult to maintain at a fixed height position without falling. When designing, the present utility model (that is, the anti-falling mechanism 100) is fixedly connected and installed at the bottom of the fire extinguishing working part 200, and the main shaft 300 is clamped and engaged through the present utility model to achieve the anti-falling effect of the fire extinguishing working part 200.

[0029] The above are only the preferred embodiments of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the idea of the present utility model belong to the protection scope of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A fall protection mechanism, characterized in that, The device includes a ring base (1) and clamping elements (3). The ring base (1) has an inner hole that runs vertically through it. Several clamping elements (3) are installed at the bottom of the ring base (1) and are evenly distributed around the periphery. Each clamping element (3) includes a first inclined seat (31) and a second inclined seat (32). The first inclined seat (31) is fixedly installed at the bottom of the ring base (1), and the second inclined seat (32) is movably connected to the first inclined seat (31). The second inclined seat (32) is installed towards the center of the inner hole of the ring base (1).

2. The fall arrest mechanism according to claim 1, characterized in that, The bottom of the ring seat (1) is provided with a notch, and each notch corresponds to the installation of a clamping element (3). The first inclined seat (31) of the clamping element (3) is installed in the notch by means of bolt fixing.

3. The fall arrest mechanism according to claim 1, characterized in that, The first inclined seat (31) and the second inclined seat (32) are both provided with inclined surfaces (311), and the first inclined seat (31) and the second inclined seat (32) are installed by the inclined surfaces (311) being attached to each other.

4. The fall arrest mechanism according to claim 1, characterized in that, The clamping element (3) also includes a tightening bolt (34), and the first inclined seat (31) and the second inclined seat (32) are connected by the tightening bolt (34).

5. The fall arrest mechanism according to claim 4, characterized in that, The first inclined seat (31) has a threaded hole (312), and the tightening bolt (34) passes through the second inclined seat (32) and is threaded into the threaded hole (312).

6. The fall arrest mechanism according to claim 1, characterized in that, A clamping block (33) is fixedly connected to the second inclined seat (32). The clamping block (33) is installed facing the center of the inner hole of the ring seat (1). The clamping block (33) is made of copper.

7. The fall arrest mechanism according to claim 1, characterized in that, The number of clamping elements (3) installed is four. Two symmetrically arranged lifting guide blocks (4) are also fixedly installed at the bottom of the ring seat (1). The lifting guide blocks (4) are installed to avoid the clamping elements (3). The lifting guide blocks (4) are provided with protrusions (41), which are set towards the center of the inner hole of the ring seat (1).

8. The fall arrest mechanism according to claim 1, characterized in that, The inner hole of the ring seat (1) is fitted with an inner ring sleeve (2), which is inserted from the top of the ring seat (1) and is made of copper.

9. The fall arrest mechanism according to claim 8, characterized in that, A cover plate (5) is fixedly installed on the top of the ring seat (1), and the cover plate (5) is used to press and fix the inner ring sleeve (2).

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