Elevator landing door strength detection device

Abstract

The utility model discloses an elevator landing door strength detection device, including mounting frame body, landing door main part, sector plate, C shape track strip, worm wheel disc, worm, gantry, threaded rod, lifting piece and impact cylinder etc. The device simulates the actual stress working condition of elevator landing door through stand, crossbeam and sliding installation landing door main part, and the sector plate rotates around the fixed bolt and slides on the C shape track strip, and the angle multidirectional adjustment and stable locking are realized in combination with the protruding block, the locating bolt and the spring structure, the worm and the worm wheel disc meshing transmission have reverse self -locking characteristics, the impact direction can be accurately controlled, the threaded rod of gantry both sides keeps synchronization through the belt linkage mechanism, drives lifting piece and impact cylinder steady lifting, thereby realizes multi -height impact detection, and the setting of the support rod of impact cylinder both sides and the rear side inclined support of stand enhances the overall impact resistance and stability.

Description

Technical Field

[0001] This utility model belongs to the field of elevator testing technology, specifically relating to an elevator landing door strength testing device. Background Technology

[0002] In existing elevators, the landing doors, as a crucial component of the elevator hall doors, directly affect the overall safety of the elevator. To ensure that the landing doors remain stable and reliable under external impact, strength testing is typically conducted during elevator manufacturing and installation. Current testing methods mostly involve manually applying external force or using a unidirectional impact device to subject the landing doors to localized impacts, thereby determining their impact resistance.

[0003] However, existing detection methods have the following shortcomings:

[0004] First, the impact direction and angle are singular, which cannot fully simulate the multi-angle and multi-directional impacts that the door may suffer in actual use, resulting in incomplete test results.

[0005] Secondly, some detection devices rely on manual operation when adjusting the impact angle and height, and the positioning structure is not stable enough, which is prone to errors and thus affects the accuracy of the detection.

[0006] Third, the existing device has poor stability during the lifting and lowering of the impact element, often resulting in tilting of the impact head or deviation of the impact force, causing deviation in the detection data;

[0007] Fourth, some devices have insufficient overall support strength, and are at risk of loosening or shifting when subjected to large impact forces, making it difficult to maintain reliability in the long term. Utility Model Content

[0008] To address the problems existing in the prior art, the purpose of this utility model is to provide an elevator landing door strength testing device that can simulate multi-angle and multi-height impacts on the main body of the elevator landing door, maintain the stability and reliable positioning of the impact element during the impact process, and improve the overall structural impact resistance.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An elevator landing door strength testing device includes a mounting frame, the mounting frame including two columns fixed to the ground, and horizontal beams arranged between the two columns at the top and bottom, with the landing door body slidably installed between the two horizontal beams at the top and bottom;

[0011] A C-shaped track is provided on the front side of the lower crossbeam, and a fixing bolt is provided at the center of the bottom of the lower crossbeam. A fan-shaped plate is slidably installed between the fixing bolt and the C-shaped track.

[0012] A worm gear is rotatably mounted on the upper surface of the sector plate. A gantry frame is fixedly mounted on the top of the worm gear. A lifting block is vertically slidably mounted on the inner side of the gantry frame. An impact cylinder is fixedly inserted through the lifting block. An impact head is provided at the output end of the impact cylinder.

[0013] Furthermore, the fixing bolt coincides with the center of the C-shaped track, the fixing bolt is rotatably mounted on the center end of the sector plate, and an arc groove is formed on the lower surface of the sector plate, which slides on the surface of the C-shaped track.

[0014] The C-shaped track bar has evenly spaced positioning holes on its surface.

[0015] Furthermore, the outer arc surface of the sector plate is provided with a protrusion, and a positioning bolt is slidably installed inside the protrusion, the end of the positioning bolt being adapted to the internal size of the positioning hole.

[0016] Furthermore, a T-shaped pull rod is provided on the outer end of the positioning bolt. The T-shaped pull rod passes through the outer surface of the protrusion, and a spring is sleeved on the surface of the T-shaped pull rod. The spring is placed inside the protrusion, and the spring applies a pushing force to the protrusion in the center direction.

[0017] Furthermore, support plates are symmetrically arranged on the outer side of the top of the fan-shaped plate, and a worm gear is horizontally rotatably installed between the two support plates. A knob is provided at the end of the worm gear, and the worm gear meshes with the worm wheel.

[0018] Furthermore, both sides of the gantry frame are vertically provided with sliding grooves, and threaded rods are vertically and rotatably installed inside the sliding grooves. The two ends of the lifting block are respectively screwed onto the threaded rods.

[0019] The threaded rod passes through the upper surface of the gantry frame, and a belt linkage mechanism is provided between the tops of the two threaded rods. The belt linkage mechanism is used to keep the two threaded rods rotating synchronously in the same direction.

[0020] Furthermore, support rods are provided on both sides of the impact cylinder. The support rods are inclined and their ends are welded to the lifting block. The support rods are used to improve the installation strength of the impact cylinder.

[0021] Furthermore, each of the columns is provided with inclined supports at its rear side, which are used to increase the overall impact resistance of the mounting frame.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This invention, by setting columns, beams, and a slidably installed landing door body on the mounting frame, allows the landing door body to be tested in a closed state, thereby realistically simulating the working conditions of an elevator during operation and solving the problem that existing testing methods cannot fully reproduce the stress state of the landing door.

[0024] This invention combines a fixing bolt, a sector plate, and a C-shaped track, enabling the sector plate to rotate around the fixing bolt and slide along the arc groove of the C-shaped track. Combined with a locking structure consisting of a protrusion, a positioning bolt, and a spring, it achieves multi-directional angle adjustment and stable fixation, thereby effectively solving the problems of single impact direction and unstable positioning structure in existing devices.

[0025] This invention utilizes the meshing transmission between a worm gear and a worm wheel, and leverages the worm's reverse self-locking characteristic to maintain a fixed state after angle adjustment, preventing rotation during impact. This makes impact direction control more precise and reliable, thus solving the problem of large angle adjustment errors and insufficient detection accuracy in existing devices.

[0026] This invention, through the cooperation of a gantry frame, threaded rod, lifting block, and belt linkage mechanism, enables the impact cylinder to achieve smooth lifting and lowering, maintaining the parallelism and stability of the impact head at different heights. This solves the problem of tilting and impact force deviation that easily occur during the lifting and lowering of the impact element in existing devices, and improves the accuracy of the test results.

[0027] This invention provides support rods on both sides of the impact cylinder and diagonal supports on the back of the column, giving the impact cylinder dual support in both the lateral and longitudinal directions during operation. This ensures that the entire device remains stable under repeated strong impacts, thus solving the problems of insufficient overall strength and easy loosening or deformation of existing devices. Attached Figure Description

[0028] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a top view of the structure of this utility model;

[0030] Figure 3 This is a bottom-view three-dimensional structural diagram of the mounting bracket of this utility model;

[0031] Figure 4 This is a schematic diagram of the installation structure of the sector plate and gantry frame of this utility model;

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of the fan-shaped plate of this utility model;

[0033] Figure 6 This is a three-dimensional structural diagram of the gantry frame and impact cylinder installation of this utility model.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Mounting frame; 11. Upright; 12. Horizontal beam; 121. Fixing bolt; 13. Diagonal brace; 2. Door body; 3. C-shaped track; 31. Positioning hole; 4. Fan-shaped plate; 41. Arc groove; 42. Protrusion; 44. Support plate; 5. Positioning bolt; 51. T-shaped tie rod; 52. Spring; 6. Worm gear; 61. Gantry frame; 62. Slide groove; 63. Threaded rod; 64. Lifting block; 65. Belt linkage mechanism; 7. Worm gear; 8. Impact cylinder; 81. Impact head; 82. Support rod. Detailed Implementation

[0036] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0037] Example 1:

[0038] like Figures 1-6 As shown, an elevator landing door strength testing device includes a mounting frame 1. The mounting frame 1 includes two columns 11 fixed to the ground. The columns 11 are rigidly fixed to the ground at their bottoms to ensure the stability of the overall device. Horizontal beams 12 are provided above and below the two columns 11. The horizontal beams 12 are connected to the columns 11 by welding to form a stable frame structure. A landing door body 2 is symmetrically slidably installed between the two horizontal beams 12. The landing door body 2 cooperates with the horizontal beams 12 through guide grooves to simulate the actual working conditions of the elevator landing door while it is in a closed state, ensuring that the stress conditions on the landing door during the testing process are close to those in actual operation.

[0039] A C-shaped track bar 3 is provided on the front side of the lower crossbeam 12. The C-shaped track bar 3 is fixed to the surface of the crossbeam 12 with screws and keeps it parallel to the ground to ensure the running accuracy of the fan-shaped adjustment structure. A fixing bolt 121 is provided at the bottom center of the lower crossbeam 12. The fixing bolt 121 and the crossbeam 12 are an integral structure to enhance strength. A fan-shaped plate 4 is slidably installed between the fixing bolt 121 and the C-shaped track bar 3. The fan-shaped plate 4 can be rotated and adjusted along the arc path of the C-shaped track bar 3 to ensure that the impact direction can change at multiple angles during the detection process.

[0040] A worm gear 6 is rotatably mounted on the upper surface of the sector plate 4. The worm gear 6 is firmly connected to the sector plate 4 through a central rotating shaft to achieve angle transmission. A gantry frame 61 is fixedly installed on the top of the worm gear 6. The gantry frame 61 consists of two vertical frames and a top crossbeam to form a stable portal structure. A lifting block 64 is vertically slidably installed on the inner side of the gantry frame 61. The lifting block 64 is connected by threads to ensure smooth lifting. An impact cylinder 8 is fixedly inserted inside the lifting block 64. The impact cylinder 8 can provide stable impact force. An impact head 81 is provided at the output end of the impact cylinder 8. The impact head 81 is used to directly act on the surface of the door body 2 to achieve strength detection and can apply impact force at different heights and angles.

[0041] like Figure 1 and Figure 3 As shown, the center of the fixing bolt 121 coincides with that of the C-shaped track 3, ensuring that the rotation trajectory of the sector plate 4 is centered on the fixing bolt 121, thereby achieving the accuracy of impact angle adjustment; the center end of the sector plate 4 is rotatably mounted on the fixing bolt 121, ensuring that it can reliably rotate under stress; an arc groove 41 is provided on the lower surface of the sector plate 4, and the arc groove 41 slides and engages with the surface of the C-shaped track 3, thereby ensuring the stability of the sector plate 4 during impact direction adjustment; positioning holes 31 are evenly provided on the surface of the C-shaped track 3, and the positioning holes 31 are used to cooperate with the positioning bolt 5 to lock the angle and prevent deviation during the detection process.

[0042] like Figure 4 and Figure 5 As shown, a protrusion 42 is provided on the outer arc surface of the sector plate 4. The protrusion 42 is fixed to the surface of the sector plate 4 by welding. A positioning bolt 5 is slidably installed inside the protrusion 42. The end of the positioning bolt 5 is adapted to the internal size of the positioning hole 31 to ensure locking reliability. During testing, the angle of the sector plate 4 can be effectively fixed to avoid the angle shifting under the action of impact force.

[0043] like Figure 5 As shown, a T-shaped pull rod 51 is provided on the outer end of the positioning bolt 5. The T-shaped pull rod 51 passes through the outer surface of the protrusion 42 for manual pulling. A spring 52 is sleeved on the surface of the T-shaped pull rod 51. One end of the spring 52 abuts against the inner surface of the protrusion 42, and the other end is connected to the positioning bolt 5. Thus, when no external force is applied, the spring 52 can push the positioning bolt 5 into the positioning hole 31 to achieve an automatic locking effect, thereby improving the convenience and stability of impact angle adjustment.

[0044] like Figure 4As shown, support plates 43 are symmetrically arranged on the outer side of the top of the fan-shaped plate 4. The support plates 43 are used to support the worm 7 and keep it in a parallel state. The worm 7 is horizontally rotatably installed between the two support plates 43. A knob is provided at the end of the worm 7. The knob is used for manual operation to rotate the worm. The worm 7 meshes with the worm wheel 6 and the angle is adjusted through gear transmission. The worm 7 has a reverse self-locking characteristic, which can prevent the angle from rotating back during the impact process and improve the detection stability.

[0045] like Figure 4 and Figure 6 As shown, both sides of the gantry frame 61 are vertically provided with sliding grooves 62. Threaded rods 63 are vertically rotatably installed inside the sliding grooves 62. The threaded rods 63 are fixed to the upper and lower ends of the gantry frame 61 by bearings to ensure rotational accuracy. The lifting block 64 is screwed onto the threaded rods 63 at both ends, and lifting is achieved through the threaded pair. The threaded rods 63 penetrate the upper surface of the gantry frame 61. A belt linkage mechanism 65 is provided between the tops of the two threaded rods 63. The belt linkage mechanism 65 is used to keep the two threaded rods 63 rotating synchronously and in the same direction, thereby ensuring the stability of the lifting block 64 during the lifting process and preventing the impact cylinder 8 from tilting.

[0046] like Figure 4 As shown, support rods 82 are provided on both sides of the impact cylinder 8. The support rods 82 are inclined and their ends are welded to the lifting block 64. The support rods 82 can provide lateral support for the impact cylinder 8, improve the installation strength of the impact cylinder 8, ensure that the impact cylinder 8 always remains horizontal when outputting impact force, avoid the impact force direction deviation, and improve the accuracy of the detection data.

[0047] like Figure 1 and Figure 3 As shown, inclined supports 13 are installed on the rear side of each column 11. The inclined supports 13 are connected to the bottom of the column 11 and the mounting frame 1 by welding. This can effectively disperse the impact force, prevent the mounting frame 1 from deforming due to repeated impacts, improve the impact resistance of the overall device, and ensure the long-term stability and reliability of the elevator door strength testing process.

[0048] Example 2:

[0049] See Figures 1-6 The operation process of an elevator landing door strength testing device is as follows:

[0050] In use, the overall structure is first fixed by the mounting frame 1. The mounting frame 1 includes two columns 11 and two upper and lower crossbeams 12. The bottom of the columns 11 is fixedly connected to the ground. The rear side of the columns 11 forms a triangular stable structure through the diagonal support 13 to improve the overall impact resistance. The landing door body 2 is slidably installed between the upper and lower crossbeams 12. The landing door body 2 is kept in a closed state to simulate the stress state of the elevator landing door in actual operation.

[0051] When adjusting the angle, the operator can rotate the sector plate 4. The sector plate 4 rotates around the fixing bolt 121 as the center of rotation, and the arc groove 41 slides on the surface of the C-shaped track 3 to ensure that the sector plate 4 always moves along the arc trajectory of the C-shaped track 3. When the sector plate 4 is rotated to a suitable angle, the positioning bolt 5 inside the protrusion 42 enters the positioning hole 31 of the C-shaped track 3 under the pushing force of the spring 52, thereby locking the sector plate 4 and achieving stable fixation in multiple angle impact directions. When it is necessary to adjust the angle again, the positioning bolt 5 can be disengaged from the positioning hole 31 by pulling the T-shaped pull rod 51 externally, so as to achieve quick unlocking and repositioning.

[0052] In terms of impact direction control, a worm gear disk 6 is installed on the upper surface of the sector plate 4. The worm gear disk 6 meshes with the horizontally arranged worm 7. A knob is provided at the end of the worm 7. The worm 7 is driven to rotate by manually rotating the knob, thereby driving the worm gear disk 6 to adjust the angle. Since the worm 7 has a reverse self-locking characteristic, it can prevent the angle from automatically returning during the impact process, thereby improving the reliability of angle adjustment and detection accuracy.

[0053] During the impact height adjustment process, the gantry 61 at the top of the worm gear 6 is provided with slide grooves 62 on both sides. Threaded rods 63 are rotatably installed inside the slide grooves 62. The two threaded rods 63 rotate synchronously and in the same direction through the belt linkage mechanism 65, ensuring that the lifting block 64 remains parallel when moving up and down. When the operator rotates the threaded rods 63, the lifting block 64 rises and falls smoothly along the slide grooves 62, and the impact cylinder 8 adjusts its height accordingly. The impact cylinder 8 acts on the door body 2 at different height positions through the impact head 81 at its output end, realizing multi-height strength testing.

[0054] During the impact process, the support rods 82 on both sides of the impact cylinder 8 can effectively support the impact cylinder 8 and prevent the impact cylinder 8 from deviating when outputting impact force, thereby ensuring that the impact head 81 maintains stable contact with the door body 2; at the same time, the diagonal support 13 on the back of the column 11 can provide additional impact resistance to the mounting frame 1 and prevent the overall frame from deforming or loosening under multiple strong impacts.

[0055] In summary, this embodiment can achieve impact angle adjustment through the cooperation of fixing bolt 121, C-shaped track bar 3 and sector plate 4, achieve precise positioning of impact direction through the meshing of worm gear 7 and worm wheel 6, achieve stable adjustment of impact height through the linkage of threaded rod 63, lifting block 64 and belt linkage mechanism 65, and apply impact force to the elevator landing door body 2 from different positions through impact cylinder 8 and impact head 81, thereby performing all-round, multi-angle and multi-height strength testing on the elevator landing door body, solving the problems of single detection angle, unstable positioning, unbalanced impact and insufficient overall support of existing testing devices.

[0056] The working principle of this utility model is as follows:

[0057] In use, the two main body doors 2 are first installed on the upper and lower parts of the crossbeam 12, respectively, and the main body doors 2 are kept closed to simulate the actual working state of the main body doors 2. The fan-shaped plate 4 is installed on the surface of the fixing bolt 121 and the C-shaped track 3. Therefore, the fan-shaped plate 4 can rotate around the fixing bolt 121 and is always supported by the C-shaped track 3, thereby adjusting the angle of the C-shaped track 3 relative to the main body door 2. The rotating worm gear 7 can control the rotation of the worm wheel 6 and has reverse self-locking property, thereby adjusting the orientation of the impact cylinder 8. Since the belt linkage mechanism 65 is set between the tops of the two threaded rods 63, the two threaded rods 63 can rotate synchronously and in the same direction. The rotating threaded rod 63 can control the lifting block 64 to lift smoothly, thereby controlling the height of the impact cylinder 8. The impact cylinder 8 controls the impact head 81 to apply impact force to the main body door 2 at various angles and heights to test its strength. This structure can realize the strength testing of the main body door 2 in all directions.

[0058] The sector plate 4 and the C-shaped track 3 are fixed together by a positioning bolt 5. When there is no force, the spring 52 applies a force towards the center to the positioning bolt 5. Therefore, when there is no force, the positioning bolt 5 will enter the corresponding positioning hole 31 to stabilize the relative position of the sector plate 4. Conversely, when the angle needs to be adjusted, the positioning bolt 5 can be disengaged from the positioning hole 3 by pulling the T-shaped pull rod 51 externally.

[0059] The symmetrical arrangement of support rods 82 on the surface of the impact cylinder 8 can increase the installation strength of the impact cylinder 8 and keep the impact cylinder 8 in a horizontal state. The inclined support 13 on the back of the column 11 can effectively increase the strength of the column 11, keep the column 11 vertical, and improve the overall impact resistance of the mounting frame 1.

[0060] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An elevator landing door strength detection device comprising a mounting frame body (1), characterized in that: The mounting frame (1) includes two columns (11) fixed to the ground. A crossbeam (12) is provided between the two columns (11) at the top and bottom. The floor door body (2) is symmetrically slidably installed between the two crossbeams (12). A C-shaped track bar (3) is provided on the front side of the lower crossbeam (12), and a fixing bolt (121) is provided at the bottom center of the lower crossbeam (12). A fan-shaped plate (4) is slidably installed between the fixing bolt (121) and the C-shaped track bar (3). A worm gear disk (6) is rotatably mounted on the upper surface of the fan-shaped plate (4). A gantry frame (61) is fixedly mounted on the top of the worm gear disk (6). A lifting block (64) is vertically slidably mounted on the inner side of the gantry frame (61). An impact cylinder (8) is fixedly passed through the inside of the lifting block (64). An impact head (81) is provided at the output end of the impact cylinder (8).

2. The elevator landing door strength detection device according to claim 1, characterized by: The fixing bolt (121) coincides with the center of the C-shaped track (3), and the fixing bolt (121) is rotatably installed on the center end of the fan-shaped plate (4). An arc groove (41) is opened on the lower surface of the fan-shaped plate (4), and the arc groove (41) slides on the surface of the C-shaped track (3). The C-shaped track bar (3) has positioning holes (31) evenly distributed on its surface.

3. The elevator landing door strength detection apparatus according to claim 2, characterized by: The outer arc surface of the fan-shaped plate (4) is provided with a protrusion (42), and a positioning bolt (5) is slidably installed inside the protrusion (42). The end of the positioning bolt (5) is adapted to the internal size of the positioning hole (31).

4. The elevator landing door strength detection apparatus according to claim 3, characterized by: The outer end of the positioning bolt (5) is provided with a T-shaped pull rod (51), which penetrates the outer surface of the protrusion (42). A spring (52) is sleeved on the surface of the T-shaped pull rod (51), which is placed inside the protrusion (42). The spring (52) applies a pushing force towards the center to the protrusion (42).

5. The elevator landing door strength detection apparatus according to claim 2, characterized by: The top outer side of the fan-shaped plate (4) is symmetrically provided with support plates (43), and a worm gear (7) is horizontally rotatably installed between the two support plates (43). A knob is provided at the end of the worm gear (7), and the worm gear (7) meshes with the worm wheel disc (6).

6. The elevator landing door strength detection apparatus according to claim 2, characterized by: The gantry frame (61) has vertically arranged sliding grooves (62) on both sides, and a threaded rod (63) is vertically rotatably installed inside the sliding groove (62). The lifting block (64) is screwed onto the threaded rod (63) at both ends. The threaded rod (63) passes through the upper surface of the gantry frame (61), and a belt linkage mechanism (65) is provided between the tops of the two threaded rods (63). The belt linkage mechanism (65) is used to keep the two threaded rods (63) rotating synchronously in the same direction.

7. The elevator landing door strength detection apparatus according to claim 1, characterized by: The impact cylinder (8) is provided with support rods (82) on both sides. The support rods (82) are inclined and their ends are welded to the lifting block (64). The support rods (82) are used to improve the installation strength of the impact cylinder (8).

8. The elevator landing door strength detection apparatus according to claim 1, characterized by: Each of the columns (11) is provided with an inclined support (13) on its rear side. The inclined support (13) is used to increase the overall impact resistance of the mounting frame (1).

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