Detection device for elevator door knife
Through the combination of track rods, lead screws, clamping and life testing mechanisms, the problems of unstable fixation and unrealistic simulation of the elevator door knife detection device are solved, high-precision positioning and real-state simulation are achieved, and the accuracy and applicability of the test are improved.
Patent Information
- Application Number
- CN202510890906.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2025-10-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing elevator door knife detection devices have problems such as unstable fixation, cumbersome operation, low positioning accuracy, inability to truly simulate the elevator working state, and poor adaptability. In particular, they are not effective in simulating mechanical behavior in complex environments and detecting multiple types of door knives.
Track rods, lead screws, clamping mechanisms and life testing mechanisms are used to achieve high-precision clamping and real motion state simulation. The linkage of incomplete gears and bidirectional screws ensures the vertical positioning of the door knife structure, and the eccentric bolts and belts are used to simulate the elevator operation state. The clamping force adjustment mechanism is used to simulate the actual stress state.
It improves the positioning accuracy and test efficiency of door knife detection, enhances the applicability of the device and the authenticity of the test, can accurately simulate the opening and closing action and stress state of the elevator door knife, and provide reliable performance evaluation.
Smart Images
Figure CN120740949A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of elevator detection equipment, and in particular relates to a detection device for elevator door blades. Background Art
[0002] As a key component in the linkage mechanism between elevator landing doors and car doors, the elevator door blade structure plays a crucial role in opening and closing the door locks. Its performance is directly related to the safety and reliability of elevator operation. To ensure the door blade structure's operational sensitivity and reliability over long-term use, it is necessary to test its durability and stress state, specifically simulating its opening and closing cycles, clamping state, and stress-deformation response.
[0003] Currently, when testing elevator door blade structures, bolt-type fixings are often used to mount the door blade on a test platform, and a manually controlled traction mechanism is used to simulate opening and closing. However, this type of testing method has the following problems: On the one hand, the traditional bolt-type fixing mechanism is cumbersome to install and has low positioning accuracy, making it difficult to ensure that the door blade structure is in a true vertical position, resulting in unrepresentative test results. On the other hand, existing testing devices often use a one-way traction mechanism to simply pull the door blade, failing to effectively simulate the mechanical behavior of the door blade structure in complex environments such as roller extrusion and automatic reset during elevator operation, and thus cannot fully evaluate the door blade structure's opening and closing stability and fatigue life.
[0004] In addition, existing testing solutions generally lack an adaptation mechanism for different types of door knife structures (such as door knives with or without automatic reset functions), resulting in poor versatility of the testing equipment and an inability to meet the performance verification requirements of multiple types of door knives in complex elevator systems. Summary of the Invention
[0005] In response to the problems existing in the prior art, the purpose of the present invention is to provide a detection device for an elevator door knife, which can realize high-precision clamping and real motion state simulation of the elevator door knife detection device, so as to solve the technical problems such as unstable fixation, single test and poor adaptability in the existing detection process.
[0006] To achieve the above object, the present invention provides the following technical solutions: A detection device for an elevator door knife, comprising a detection workbench and a door knife structure, wherein track rods are symmetrically arranged on the front side of the top of the detection workbench, the track rods being axially distributed front and back, a lead screw being rotatably installed between two of the track rods, and a door knife fixing mechanism being arranged on the rear side of the detection workbench, the door knife fixing mechanism being used to quickly fix the door knife structure and keep the door knife structure in a vertical state; The door knife structure includes a base plate, and blades are symmetrically arranged on the front side of the base plate; A support column is vertically fixed to one side of the upper surface of the detection workbench, and a life test mechanism is installed on the top of the support column, and the life test mechanism is used to drive the door knife structure to open and close reciprocally; A clamping force adjustment mechanism is installed on the upper surface of the two track rods. The clamping force adjustment mechanism is placed in front of the door knife structure. The clamping force adjustment mechanism is used to adjust the relative resistance of the two blades when they move.
[0007] Furthermore, the door knife fixing mechanism includes a base fixed on the rear side of the upper surface of the detection workbench, the base is hollow inside, a support seat is provided at the top center of the base, a card slot adapted to the bottom of the base plate is provided on the upper surface of the support seat, mounting plates are symmetrically provided on both sides of the base, an incomplete gear is rotatably installed between the two mounting plates on the same side, and the bottom of the incomplete gear is placed on the inner side of the base.
[0008] Furthermore, a bidirectional screw is rotatably installed inside the base, and a tooth plate is symmetrically slidably installed inside the base. The two tooth plates are respectively screwed on different thread surfaces of the bidirectional screw, and the bottom of the incomplete gear is meshed with the tooth plate.
[0009] Furthermore, a swing rod is provided on the top of the incomplete gear, and the two swing rods are respectively placed on both sides of the door knife structure. A clamping rod is rotatably installed on the top of the swing rod, and the clamping rod is vertically arranged. The two clamping rods clamp and fix the two sides of the door knife structure.
[0010] Furthermore, an extension beam is horizontally provided on one side of the top of the support column close to the door knife structure, and a fixed seat is provided at the end of the extension beam. The life testing mechanism includes a turntable rotating on the front side of the top of the support column and a sliding rod sliding horizontally through the fixed seat, and the turntable is installed on the control motor.
[0011] Furthermore, an eccentric bolt is provided on the front surface of the turntable, and a first connecting rod is hinged on the surface of the eccentric bolt. The end of the first connecting rod facing away from the eccentric bolt is hinged to the end of the sliding rod. The side of the sliding rod close to the door knife structure is connected to a belt strip, and the end of the belt strip is installed on the traction part of the door knife structure.
[0012] Furthermore, the clamping force adjustment mechanism includes a slider, which is screwed onto the screw, and a vertical plate is vertically arranged on the top of the slider, and a rotating shaft is rotatably passed through the top of the vertical plate, and a connecting plate is arranged at the rear end of the rotating shaft, and the connecting plate is tilted, and rollers are rotatably installed at both ends of the rear side of the connecting plate, and the two rollers are placed between the two blades.
[0013] Furthermore, a limiting arc groove is provided on the front surface of the vertical plate with the rotation axis of the rotating shaft as the center, an extension plate is provided at the front end of the rotating shaft, and a fixing bolt is provided on the rear side of the extension plate. The fixing bolt slides in the limiting arc groove to limit the angle of the connecting plate.
[0014] Furthermore, a support platform is provided below the front side of the vertical plate, and the top of the support platform is symmetrically arranged with the column. Counterweight blocks are slidably installed on the surfaces of the two columns. A second connecting rod is hinged on the front side of the counterweight block, and the end of the second connecting rod facing away from the counterweight block is hinged to the end of the extension plate. A spring is sleeved above the surface of the column, and an adjusting nut is screwed on the end of the column. The spring is placed between the counterweight block and the adjusting nut, and the spring applies a downward thrust to the counterweight block.
[0015] Compared with the prior art, the present invention has the following beneficial effects: The simplified and precisely positioned door blade fixation method solves the cumbersome bolt installation and difficulty in ensuring vertical positioning of the door blade in existing testing devices. By inserting the bottom of the door blade structure's baseplate into the slot, a bidirectional screw drives the toothed plate in conjunction with the incomplete gear, achieving synchronized swing of the two swing arms. The clamping rod automatically clamps the two sides of the door blade structure and maintains its vertical position, enabling fast and accurate positioning and installation without relying on bolts, improving testing efficiency and consistency.
[0016] The life test structure realistically simulates the opening and closing motion of an elevator door blade, resolving the issues of traditional testing methods, such as a lack of power transmission simulation and poor repeatability. The turntable reciprocates the sliding rod via an eccentric bolt and a first connecting rod, which then repeatedly opens and closes the door blade mechanism via a belt. This effectively simulates the forces and motion of the door blade during elevator operation. The system accommodates both automatic and non-automatic reset door blades, enhancing the device's applicability and test authenticity.
[0017] The clamping force adjustment mechanism is rationally designed to simulate the stress conditions experienced during the actual opening and closing of elevator door blades, resolving the issues with existing testing devices, such as the inability to adjust the force applied and the resulting distorted squeezing effect. This structure adjusts the clamping position by moving a slider, and simulates squeezing by inserting a roller between the blades. When the door blade is closed, the extension plate drives the counterweight to apply reverse pressure, creating the actual working load on the blades. The clamping force is dynamically adjusted by using a spring and an adjustment nut to accurately reproduce the hook squeezing force experienced during actual door blade operation, providing an effective basis for evaluating the structural performance of the door blade. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 3 It is a structural schematic diagram of the fixing mechanism of the present invention; Figure 4 This is a schematic diagram of the structure of the door knife in a fixed state of the present invention; Figure 5is a schematic cross-sectional structural diagram of the fixing mechanism of the present invention; Figure 6 This is a schematic structural diagram of the life test mechanism of the present invention; Figure 7 Schematic diagram of the front view of the clamping force adjustment mechanism of the present invention; Figure 8 Schematic diagram of the back structure of the clamping force adjustment mechanism of the present invention; Figure 9 It is a schematic diagram of the installation structure of the rotating shaft and the roller of the present invention.
[0019] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Inspection workbench; 11. Track rod; 12. Lead screw; 13. Support column; 131. Extension beam; 132. Fixed seat; 2. Door knife fixing mechanism; 21. Base; 22. Mounting plate; 23. Support seat; 231. Slot; 24. Bidirectional screw; 25. Tooth plate; 26. Incomplete gear; 27. Swing lever; 28. Clamping lever; 3. Door blade structure; 31. Base plate; 32. Blade; 4. Life test mechanism; 41. Turntable; 42. Eccentric bolt; 43. First connecting rod; 44. Sliding rod; 45. Belt strip; 5. Clamping force adjustment mechanism; 51. Slider; 52. Vertical plate; 521. Limiting arc groove; 53. Rotating shaft; 54. Connecting plate; 55. Roller; 56. Extension plate; 57. Fixing bolt; 58. Support platform; 59. Column; 510. Counterweight; 511. Spring; 512. Adjusting nut; 513. Second connecting rod. DETAILED DESCRIPTION
[0020] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following examples. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.
[0021] Example 1: See Figure 1-9A detection device for elevator door knife includes a detection workbench 1 and a door knife structure 3. Track rods 11 are symmetrically arranged on the front side of the top of the detection workbench 1. The track rods 11 are axially distributed front and back. A lead screw 12 is rotatably installed between the two track rods 11. A door knife fixing mechanism 2 is provided on the rear side of the detection workbench 1. The door knife fixing mechanism 2 is used to quickly fix the door knife structure 3 and keep the door knife structure 3 in a vertical state; the door knife structure 3 includes a base plate 31. Blades 32 are symmetrically arranged on the front side of the base plate 31. The blades 32 are movable structures and can be moved during the detection. reciprocating motion during the process; a support column 13 is vertically fixed to one side of the upper surface of the detection workbench 1, and a life testing mechanism 4 is installed on the top of the support column 13. The life testing mechanism 4 is used to drive the reciprocating opening and closing of the door knife structure 3, and the switching action is realized by repeatedly loading the traction part; a clamping force adjustment mechanism 5 is installed on the upper surface of the two track rods 11, and the clamping force adjustment mechanism 5 is placed in front of the door knife structure 3. The clamping force adjustment mechanism 5 is used to adjust the relative resistance of the two blades 32 when moving, so as to simulate the changes in the extrusion pressure on the door knife structure during the actual operation of the elevator.
[0022] See Figure 1-5 The door knife fixing mechanism 2 includes a base 21 fixed to the rear side of the upper surface of the detection workbench 1. The base 21 is hollow inside, and a support seat 23 is provided at the top center of the base 21. The upper surface of the support seat 23 is provided with a card slot 231 that is compatible with the bottom of the base plate 31. The card slot 231 can achieve quick limit installation without the aid of bolts; mounting plates 22 are symmetrically provided on both sides of the base 21, and the mounting plates 22 play a supporting and positioning role. An incomplete gear 26 is rotatably installed between the two mounting plates 22 on the same side. The bottom of the incomplete gear 26 is placed on the inner side of the base 21 and can engage with the tooth plate 25 to achieve control of the deflection angle.
[0023] See Figure 1-5 A bidirectional screw 24 is rotatably installed inside the base 21. Both ends of the bidirectional screw 24 are exposed and provided with knobs to facilitate manual adjustment. A tooth plate 25 is symmetrically slidably installed inside the base 21. The two tooth plates 25 are respectively screwed on different thread surfaces of the bidirectional screw 24. The relative sliding of the tooth plates 25 can be achieved by rotating the bidirectional screw 24. The bottom of the incomplete gear 26 is engaged with the tooth plate 25. The movement of the tooth plate 25 drives the incomplete gear 26 to rotate, thereby realizing the synchronous action of the clamping device.
[0024] See Figure 1-5A swing rod 27 is provided on the top of the incomplete gear 26. The two swing rods 27 are respectively placed on both sides of the door knife structure 3. The swing rod 27 can swing synchronously with the rotation of the incomplete gear 26; a clamping rod 28 is rotatably installed on the top of the swing rod 27. The clamping rod 28 is vertically arranged. The two clamping rods 28 clamp and fix the two sides of the door knife structure 3. The clamping rod 28 can rotate and swing in the process of the swing rod 27 approaching, thereby completing the automatic clamping of the door knife structure 3 and maintaining its vertical state, thereby enhancing the positioning accuracy and repeatability during the test.
[0025] See Figure 1-6 An extension beam 131 is horizontally arranged on one side of the top of the support column 13 close to the door knife structure 3, and a fixed seat 132 is arranged at the end of the extension beam 131. The fixed seat 132 is penetrated by the installation slide rod 44 in front and back. The slide rod 44 is the key connecting part of the life test mechanism 4; the life test mechanism 4 includes a turntable 41 rotating on the front side of the top of the support column 13 and a slide rod 44 sliding horizontally through the fixed seat 132. The turntable 41 is installed on the control motor, and the control motor can continuously drive the turntable 41 to rotate around the axis to provide reciprocating motion driving force.
[0026] See Figure 1-6 An eccentric bolt 42 is provided on the front surface of the turntable 41. The eccentric bolt 42 realizes the conversion of circular motion into linear motion through eccentric design; a first connecting rod 43 is hinged on the surface of the eccentric bolt 42, and the end of the first connecting rod 43 away from the eccentric bolt 42 is hinged to the end of the slide rod 44, and a belt strip 45 is connected to the side of the slide rod 44 close to the door knife structure 3. The end of the belt strip 45 is installed in the traction part of the door knife structure 3. The belt strip 45 can perform horizontal reciprocating motion driven by the turntable 41 to simulate the opening and closing action of the door knife structure 3 under the operation state of the elevator, and realize the life fatigue test function.
[0027] See Figure 7-9 The clamping force adjustment mechanism 5 includes a slider 51, which is screwed on the screw 12. By rotating the screw 12, the slider 51 can be moved in the direction of the track rod 11, thereby realizing the adjustment of the position of the vertical plate 52; a vertical plate 52 is vertically arranged on the top of the slider 51, and a rotating shaft 53 is rotated through the top of the vertical plate 52. A connecting plate 54 is arranged at the rear end of the rotating shaft 53. The connecting plate 54 is tilted, and rollers 55 are rotatably installed at both ends of the rear side of the connecting plate 54. The two rollers 55 are placed between the two blades 32. The rollers 55 can simulate the squeezing force of the lock hook on the blade in the actual elevator system during the opening and closing process of the door knife structure 3.
[0028] See Figure 7-9A limiting arc groove 521 is provided on the front surface of the vertical plate 52 with the rotating axis 53 of the rotating shaft 53 as the center, and the arc length of the limiting arc groove 521 corresponds to the swing angle range of the connecting plate 54; an extension plate 56 is provided at the front end of the rotating shaft 53, and a fixing bolt 57 is provided on the rear side of the extension plate 56. The fixing bolt 57 slides in the limiting arc groove 521 to limit the angle of the connecting plate 54, thereby avoiding excessive swing of the door knife structure 3 during the opening and closing process and preventing distortion of the test data.
[0029] See Figure 7-9 The top of the support platform 58 is symmetrically arranged with the column 59. The counterweight blocks 510 are slidably installed on the surfaces of the two columns 59. The front side of the counterweight block 510 is hinged with a second connecting rod 513. The end of the second connecting rod 513 facing away from the counterweight block 510 is hinged to the end of the extension plate 56, and the counterweight block 510 is driven to move up and down by the angle change of the extension plate 56; a spring 511 is sleeved above the surface of the column 59, one end of the spring 511 rests on the lower surface of the counterweight block 510, and the other end rests on the bottom of the adjusting nut 512. The adjusting nut 512 is screwed on the end of the column 59 for adjusting the compression amount of the spring 511 to control the downward thrust of the counterweight block 510, thereby realizing the adjustment of the extrusion force of the roller 55, ensuring that the clamping force adjustment mechanism 5 can set the appropriate reaction force according to different door knife structures.
[0030] Example 2: See Figure 1-5 In this embodiment, to quickly secure and vertically position the door blade structure 3, the base plate 31 of the door blade structure 3 is designed with a rectangular boss structure made of aluminum alloy (model: 6061-T6) to increase structural rigidity and reduce mass. A rectangular slot 231 is defined on the support base 23 at the top of the base 21, which engages with the boss at the bottom of the base plate 31. The engagement depth is 20 mm, enhancing stability. A bidirectional screw 24 is installed within the base 21, with a pitch of 2 mm (left-hand) and 2 mm (right-hand). Rotating the bidirectional screw 24 drives two toothed plates 25, each of which is screwed to the base 21, to slide within the guide groove. The toothed plates 25 engage with the incomplete gear 26, driving the swing arm 27 to swing inward at a 6° angle. The ends of the clamping rod 28 (made of POM plastic) clamp the two sides of the door blade structure 3. This solution completes automatic alignment and clamping within 3 seconds, significantly improving installation efficiency.
[0031] The door knife structure 3 is connected to the fixed plate by bolt penetration in a traditional way. Under the conditions of manual adjustment of the vertical state and manual tightening of 4 bolts, a single fixing process takes more than 90 seconds, and there is an error in the accuracy of repeated clamping. The positioning angle deviation is within the range of ±3°, which is not conducive to the repeatability and accuracy control of large-scale testing. The structure of this embodiment has higher controllability and stable accuracy.
[0032] Example 3: See Figure 1-6 In this embodiment, to simulate the actual opening and closing state of an elevator door blade, the life test mechanism 4 drives the traction portion of the door blade structure 3 to reciprocate. The support column 13 is made of 45# steel, with an extension beam 131 welded to the top. The end of the extension beam 131 is fixed to the sliding guide structure fixing seat 132 by bolt connection. The control motor (model: TECO servo motor A3 series, rated speed: 1500rpm) drives the turntable 41 to rotate at 300rpm. The eccentric bolt 42 is installed on the surface of the turntable 41 with an eccentric distance of 12mm. ; The eccentric bolt 42 is hinged to the first connecting rod 43 (made of stainless steel 304), the first connecting rod 43 is connected to the slide rod 44 (made of engineering plastic, outer diameter Φ16mm, stroke 60mm), the front end of the slide rod 44 is connected to the belt strip 45, the belt strip 45 is a flexible composite rubber transmission belt (width 25mm), and the other end is fixed to the traction part of the door knife structure 3; after the motor is started, the slide rod 44 reciprocates at a frequency of 1Hz, driving the door knife structure 3 to complete 60 opening and closing actions per minute, which is suitable for 20,000 life cycle tests.
[0033] The door knife is tested reciprocatingly by manual pulling. Each operation requires manual assistance to complete an opening and closing cycle, which is inefficient and has inconsistent movement amplitudes. The test error fluctuates greatly, and manual repeated testing causes high fatigue and poor stability. In this embodiment, the actual elevator operating conditions are simulated by motor drive and mechanism linkage, which makes the test more standardized and the data more reliable.
[0034] Example 4: See Figure 7-9 In order to solve the problem that the existing test device cannot simulate the actual squeezing force of the door knife lock hook on the blade, this embodiment designs a clamping force adjustment mechanism 5 to simulate the process of applying a reaction force; the slider 51 of the clamping force adjustment mechanism 5 is made of copper alloy material (model: QSn6.5-0.1), which is screwed on the screw 12. The screw 12 is rotated to move the slider 51 back and forth; the top of the slider 51 is welded with a vertical plate 52 (made of Q235 steel plate), and a rotating shaft 53 (Φ12mm) is installed through the top of the vertical plate 52. The rear end of the rotating shaft 53 is fixed with a connecting plate 54 (made of 45# steel, length 80 mm, the inclination angle is set to 30°), rollers 55 are rotatably installed at both ends of the connecting plate 54. The rollers 55 are stainless steel rollers with rubber covering and an outer diameter of 30 mm. The rollers 55 are respectively inserted between the two blades 32 on the front side of the door knife structure 3; a limiting arc groove 521 (radius 25 mm, arc length 80°) is provided at the front of the vertical plate 52 to limit the maximum deflection angle of the connecting plate 54; the front end of the rotating shaft 53 is connected to the extension plate 56, and a fixing bolt 57 is provided at the rear end of the extension plate 56. The fixing bolt 57 slides in the limiting arc groove 521 to control the maximum opening angle of the connecting plate 54.
[0035] A support platform 58 is installed below the vertical plate 52, and two columns 59 are set above the support platform 58. The column 59 is provided with a spring 511 (free length 60mm, stiffness 20N / mm), and a counterweight block 510 (iron block, mass 1kg) is slidably installed on the surface of the column 59. The front end of the counterweight block 510 is hinged to the tail of the extension plate 56 through the second connecting rod 513. The adjusting nut 512 is used to adjust the spring compression amount, so as to accurately regulate the clamping force during the closing process of the door knife structure, and adapt to the force requirements of door knife lock hooks of different specifications.
[0036] No clamping force adjustment structure is provided, and the opening and closing action is tested only by fixing the door knife position, which cannot provide effective resistance simulation, resulting in a large deviation between the test results and the actual elevator operation status. This embodiment provides a stable and adjustable extrusion load through a composite mechanical structure to ensure that the measured data is more representative.
[0037] The working principle of the present invention is as follows: before the test, the door knife structure 3 is first fixed. In order to simulate the real working environment, the door knife structure 3 needs to be kept vertical. First, the bottom of the base plate 31 is installed on the card slot 231, and then the knob at the end of the bidirectional screw 24 is rotated to control the relative movement of the two tooth plates 25 through different thread surfaces. At this time, the engagement of the tooth plate 25 with the incomplete gear 26 can drive the swing rod 27 to swing. When clamping, the ends of the two swing rods 27 are controlled to move toward the center position. Since the clamping rod 28 and the end of the swing rod 27 can rotate, when the ends of the swing rod 27 are close to each other, the two sides of the door knife structure 3 can be clamped by the clamping rods 28 on both sides to fix the door knife structure 3 and keep it in a vertical state. Compared with the existing bolt installation and fixing method, this structure can quickly clamp the door knife structure 3 and ensure the vertical state. Then, the end of the belt strip 45 is installed on the traction part of the door knife structure 3 to simulate the belt transmission of the elevator studio, and the motor is started to control the rotation of the turntable 41. Since the slide bar 44 is installed on the inner side of the fixing seat 132 when sliding horizontally, the slide bar 44 can be driven to move back and forth through the cooperation of the eccentric bolt 42 and the first connecting rod 43 when the turntable 41 rotates, and then the traction part of the door knife structure 3 is pulled back and forth by the belt strip 45 to perform multiple openings or closings, thereby performing a life test to detect the maximum number of reciprocating switches of the door knife structure 3. This mechanism is suitable for the door knife structure 3 that can automatically reset. If the door knife structure 3 cannot automatically reset, the belt strip 45 can be replaced by a hard rod to achieve reciprocating switching; During the test, the movable clamping force adjustment mechanism 5 moves backward, thereby allowing the two rollers 55 to enter between the blades 32. When reciprocating and opening, the two rollers 55 can be squeezed to simulate the squeezing of the elevator rollers in a real environment. When the blades 32 are fully closed, the connecting plate 54 is in a vertical state, and the extension plate 56 will rotate together with the rotating shaft 53 and be in a horizontal state. The fixing bolt 57 is placed inside the limiting arc groove 521 to limit the inclination angle of the connecting plate 54 to prevent the angle from being too large when the door knife structure 3 is open. When closing, the upward movement of the end of the extension plate 56 can pull the counterweight block 510 upward through the second connecting rod 513, thereby applying a reverse force to the two blades 32 to simulate the force of opening the elevator lock hook, and the adjusting nut 512 can be adjusted according to the usage to control its squeezing force on the spring 511, thereby adjusting the gravity of the counterweight block 510 to detect the squeezing size of the roller when the door knife structure 3 is opened.
[0038] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.
Claims
1. A detection device for an elevator door knife, comprising a detection workbench (1) and a door knife structure (3), characterized in that: Track rods (11) are symmetrically arranged on the front side of the top of the detection workbench (1), and the track rods (11) are axially distributed front and back. A lead screw (12) is rotatably installed between the two track rods (11). A door knife fixing mechanism (2) is arranged on the rear side of the detection workbench (1), and the door knife fixing mechanism (2) is used to quickly fix the door knife structure (3) and keep the door knife structure (3) in a vertical state. The door knife structure (3) comprises a base plate (31), and a blade (32) is symmetrically arranged on the front side of the base plate (31); A support column (13) is vertically fixed to one side of the upper surface of the detection workbench (1), and a life test mechanism (4) is installed on the top of the support column (13). The life test mechanism (4) is used to drive the door knife structure (3) to open and close reciprocally; A clamping force adjustment mechanism (5) is installed on the upper surface of the two track rods (11). The clamping force adjustment mechanism (5) is placed in front of the door blade structure (3). The clamping force adjustment mechanism (5) is used to adjust the relative resistance of the two blades (32) when they move.
2. The detection device for elevator door blade according to claim 1, characterized in that: The door knife fixing mechanism (2) includes a base (21) fixed on the rear side of the upper surface of the detection workbench (1), the base (21) is hollow inside, a support seat (23) is provided at the top center of the base (21), a slot (231) adapted to the bottom of the base plate (31) is provided on the upper surface of the support seat (23), mounting plates (22) are symmetrically provided on both sides of the base (21), an incomplete gear (26) is rotatably installed between the two mounting plates (22) on the same side, and the bottom of the incomplete gear (26) is placed on the inner side of the base (21).
3. The detection device for elevator door blade according to claim 2, characterized in that: A bidirectional screw (24) is rotatably mounted inside the base (21), and a tooth plate (25) is symmetrically slidably mounted inside the base (21). The two tooth plates (25) are respectively screwed on different thread surfaces of the bidirectional screw (24), and the bottom of the incomplete gear (26) is meshed with the tooth plate (25).
4. The detection device for elevator door blade according to claim 3, characterized in that: A swing rod (27) is provided on the top of the incomplete gear (26), and the two swing rods (27) are respectively placed on both sides of the door knife structure (3). A clamping rod (28) is rotatably installed on the top of the swing rod (27), and the clamping rod (28) is vertically arranged. The two clamping rods (28) clamp and fix the two sides of the door knife structure (3).
5. The detection device for elevator door blade according to claim 1, characterized in that: An extension beam (131) is horizontally arranged on one side of the top of the support column (13) close to the door blade structure (3), and a fixed seat (132) is arranged at the end of the extension beam (131). The life test mechanism (4) includes a turntable (41) rotating on the front side of the top of the support column (13) and a slide rod (44) sliding horizontally through the fixed seat (132), and the turntable (41) is installed on the control motor.
6. The detection device for elevator door blade according to claim 5, characterized in that: An eccentric bolt (42) is provided on the front surface of the turntable (41), and a first connecting rod (43) is hinged on the surface of the eccentric bolt (42). One end of the first connecting rod (43) facing away from the eccentric bolt (42) is hinged to the end of a slide rod (44). A belt strip (45) is connected to the side of the slide rod (44) close to the door knife structure (3), and the end of the belt strip (45) is installed on the traction part of the door knife structure (3).
7. The detection device for elevator door blade according to claim 1, characterized in that: The clamping force adjustment mechanism (5) includes a slider (51), the slider (51) is screwed onto the lead screw (12), a vertical plate (52) is vertically arranged on the top of the slider (51), a rotating shaft (53) is rotatably passed through the top of the vertical plate (52), a connecting plate (54) is arranged at the rear end of the rotating shaft (53), the connecting plate (54) is tilted, and rollers (55) are rotatably mounted on both ends of the rear side of the connecting plate (54), and the two rollers (55) are placed between the two blades (32).
8. The detection device for elevator door blade according to claim 7, characterized in that: A limiting arc groove (521) is provided on the front surface of the vertical plate (52) with the rotation axis of the rotating shaft (53) as the center, an extension plate (56) is provided at the front end of the rotating shaft (53), and a fixing bolt (57) is provided on the rear side of the extension plate (56). The fixing bolt (57) slides in the limiting arc groove (521) to limit the angle of the connecting plate (54).
9. The detection device for elevator door blade according to claim 8, characterized in that: A support platform (58) is provided below the front side of the vertical plate (52), and the top of the support platform (58) is symmetrically arranged with the column (59). Counterweight blocks (510) are slidably mounted on the surfaces of the two columns (59). A second connecting rod (513) is hinged on the front side of the counterweight block (510), and one end of the second connecting rod (513) facing away from the counterweight block (510) is hinged to the end of the extension plate (56). A spring (511) is sleeved above the surface of the column (59), and an adjusting nut (512) is screwed on the end of the column (59). The spring (511) is placed between the counterweight block (510) and the adjusting nut (512), and the spring (511) applies a downward thrust to the counterweight block (510).