A small electronic trigger type safety tong
By designing a small electronically triggered safety gear, and utilizing an inductive switch and a push plate brake wheel structure, the problem of existing safety gears being unable to monitor in real time was solved, thus achieving both elevator safety assurance and convenient equipment maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI GREEN SHIELD PLASTIC&RUBBER CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-07
AI Technical Summary
The existing safety clamps lack a detection structure, making it impossible to monitor their working status in real time. This results in the elevator shaft space being too small to detect and handle abnormal situations in a timely manner.
A small electronically triggered safety clamp was designed. It monitors the state of the electromagnet through an inductive switch and combines the mechanical structure of the push plate and brake wheel to achieve emergency braking of the elevator. The protective shell and heat dissipation holes extend the service life of the equipment.
It enables real-time monitoring and emergency braking of the safety clamp, ensuring elevator safety and facilitating maintenance and extending equipment lifespan.
Smart Images
Figure CN224467295U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of auxiliary component manufacturing technology for elevators, specifically a small electronically triggered safety clamp. Background Technology
[0002] As an indispensable vertical transportation tool in modern high-rise buildings, the safety of elevators is of paramount importance. The safety brake is one of the key components of the elevator safety protection system. In the event of an accident (such as overspeeding, rope breakage, etc.), the safety brake can act quickly to stop the car on the guide rails, preventing the elevator from falling or overshooting, thereby ensuring the safety of passengers and the integrity of the equipment.
[0003] In practical applications, some existing safety brakes lack detection structures, making it impossible to monitor their working status in real time. Even if the electromagnet in the safety brake malfunctions after the elevator has been running for a period of time, it is difficult to detect it in time. Furthermore, the confined space in elevator shafts makes maintenance of the safety brakes extremely inconvenient, hindering the timely detection and handling of any abnormalities. Therefore, a small, electronically triggered safety brake is proposed to address these problems. Utility Model Content
[0004] The purpose of this application is to address the shortcomings of existing technologies by designing a small electronically triggered safety clamp, which solves the problem that existing safety clamps lack a detection structure and cannot monitor their working status in real time.
[0005] To achieve the above objectives, this application adopts the following technical solution:
[0006] A small electronically triggered safety clamp includes a mounting base with a mating groove on its upper part. A mounting plate a is fixedly connected to the front side of the mounting base. A mounting plate b and a proximity switch are fixedly connected to the left side of mounting plate a. An electromagnet is fixedly connected to the outer side of mounting plate a. The output end of the electromagnet penetrates the inner wall of mounting plate b. A push plate is fixedly connected to the rear side of the output shaft of the electromagnet. A guide groove is obliquely formed on the upper part of the push plate. A fixing member fixed to the upper part of the mounting base is slidably connected to the inner wall of the guide groove. A guide groove is provided through the left side of the push plate, and a brake wheel is slidably connected to the inner wall of the guide groove. The trigger end of the inductive switch contacts the front side of the push plate. A protective shell is inserted into the outer side of the mounting plate a. A limit groove is provided on the right side of the mounting plate a. An insertion hole is provided at the front right side of the protective shell. A J-shaped connector is inserted into the inner wall of the insertion hole. The connector is inserted into the inner wall of the limit groove. A spring is fixedly connected to the inner wall of the connector. An insertion groove is provided on the right side of the protective shell, and the spring is engaged with the inner wall of the insertion groove.
[0007] Preferably, a stop bar is fixedly connected to the upper part of the protective shell near the insertion groove. The stop bar is set in a semi-cylindrical shape, and the brake wheel slides on the inner wall of the mating groove.
[0008] Preferably, the protective shell has multiple sets of heat dissipation holes on both the upper and lower parts, and a dustproof mesh is fixedly connected to the inner wall of the protective shell near the insertion hole.
[0009] Preferably, the upper part of the spring is vertically arranged, and the lower part of the spring is arc-shaped.
[0010] Preferably, the guide groove is L-shaped, and the bend of the L-shape of the guide groove is an arc surface.
[0011] Preferably, the right side of the mating groove is an inclined surface, and the lower right side of the mating groove is an arc surface.
[0012] Preferably, the fixing member includes a guide member, the lower front and rear sides of which are provided with columnar protrusions, and the columnar protrusions of the guide member are inserted into the upper inner wall of the mounting base.
[0013] Preferably, a fixing bolt is provided through the rear inner wall of the guide member, and the lower part of the fixing bolt is threadedly connected to the inner wall of the mounting base.
[0014] This application has the following beneficial effects:
[0015] 1. This application utilizes the principle that when the electromagnet is de-energized, it pushes the push plate to move backward, which, in conjunction with the sliding guide of the guide groove and the fixing component, drives the brake wheel to achieve emergency braking. The electromagnet is monitored by the feedback signal of the inductive switch. At the same time, the protective shell is fixed to the mounting plate a by the plug-in component and the spring piece, which enables rapid braking. The heat dissipation holes at the top and bottom can prevent the electromagnet from overheating, and the dustproof net blocks dust from entering, extending the service life of the equipment.
[0016] 2. This application uses fixing bolts to fix the guide member to the mounting base, providing rigid support for the push plate, and cooperating with the guide groove on the push plate to stably guide the push plate, avoiding deformation due to force during braking and affecting the braking effect. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this application;
[0018] Figure 2 This is a schematic diagram showing the disassembled structure of mounting plate a and protective shell in this application;
[0019] Figure 3 This is a schematic diagram of the disassembled three-dimensional structure of this application;
[0020] Figure 4 This is a schematic diagram of the spring clip and the insertion slot in this application.
[0021] The components are as follows: 1. Mounting base; 2. Mating groove; 3. Push plate; 4. Guide groove; 5. Guide groove; 6. Fixing component; 61. Fixing bolt; 62. Guide component; 7. Brake wheel; 8. Mounting plate a; 9. Electromagnet; 10. Inductive switch; 11. Mounting plate b; 12. Protective shell; 13. Plug hole; 14. Plug component; 15. Plug groove; 16. Stop bar; 17. Spring piece; 18. Limiting groove. Detailed Implementation
[0022] As shown in Figure 3, a small electronically triggered safety clamp includes a mounting base 1, which serves as the basic support component for the entire safety clamp and allows the power-off safety clamp to be installed on the elevator car. The upper part of the mounting base 1 has a mating groove 2 for placing the car guide rail. A mounting plate a8 is fixedly connected to the front side of the mounting base 1 for fixing components such as the electromagnet 9 and mounting plate b11, providing mounting positions for these components. Mounting plate b11 and a sensor switch 10 are fixedly connected to the left side of mounting plate a8. The terminals of the sensor switch 10 pass through mounting plate a8, and the sensor switch 10 provides feedback signals to activate the electromagnet 9. The elevator monitors the operation. An electromagnet 9 is fixedly connected to the outer side of the mounting plate a8. The electromagnet 9 is energized and de-energized by the control terminal in the elevator car. When energized, it generates magnetic force, and its output end pulls the push plate 3 forward, so that the brake wheel 7 is in a non-braking state, and the elevator operates normally. When de-energized, the magnetic force disappears, and its output end is reset by the spring in the electromagnet 9, and pushes the push plate 3 backward, driving the brake wheel 7 to move. The output end of the electromagnet 9 passes through the inner wall of the mounting plate b11. The push plate 3 is fixedly connected to the rear side of the output shaft of the electromagnet 9. When the electromagnet 9 is energized or de-energized, the push plate 3 is received and transmitted.
[0023] like Figure 2-4 As shown, a guide groove 4 is inclinedly opened through the upper part of the push plate 3 to guide the movement of the push plate 3, causing the push plate 3 to move to the left rear side, thereby pushing the brake wheel 7 and ensuring the stability and accuracy of the movement of the push plate 3. The inner wall of the guide groove 4 is slidably connected to a fixing piece 6 fixed to the upper part of the mounting base 1. A guide groove 5 is opened through the left side of the push plate 3 to guide the movement trajectory of the brake wheel 7. At the same time, the guide groove 5 can drive the brake wheel 7 to reset. The inner wall of the guide groove 5 is slidably connected to the brake wheel 7. When the push plate 3 moves, it drives the brake wheel 7 to move, so that it contacts the car guide rail. The friction force stops the elevator on the guide rail, which plays a safety protection role in preventing the elevator from falling and overspeeding. The trigger end of the induction switch 10 contacts the front side of the push plate 3. When the push plate 3 moves, the induction switch 10 is triggered to provide feedback on the position signal of the push plate 3 so that the control system can understand the working status of the safety clamp in time. A protective shell 12 is inserted into the outer side of the mounting plate a8 to protect the internal components such as the electromagnet 9 and prevent dust, debris and other objects from entering and damaging the components.
[0024] like Figure 2-4 As shown, a limiting groove 18 is provided on the right side of the mounting plate a8, and a plug-in hole 13 is provided on the front right side of the protective shell 12 for installing a plug-in component 14 to connect the protective shell 12 to the mounting plate a8. A J-shaped plug-in component 14 is inserted into the inner wall of the plug-in hole 13, connecting the protective shell 12 to the mounting plate a8 and ensuring the fixation of the protective shell 12. The plug-in component 14 is inserted into the inner wall of the limiting groove 18, and a spring piece 17 is fixedly connected to the inner wall of the plug-in component 14. The upper part of the spring piece 17 is... The spring piece 17 is vertically positioned, with its lower part rounded. When the connector 14 is inserted into the connector hole 13 and the limiting groove 18, the rounded part of the spring piece 17 engages with the inner wall of the connector groove 15, thus fixing the connector 14 through elastic force. This ensures the stability of the protective shell 12 installation, facilitates easy installation, and allows for easy disassembly and maintenance. The right side of the protective shell 12 has a connector groove 15, which engages with the spring piece 17 on the connector 14 to further fix the connector 14 and ensure the firmness of the protective shell 12 installation. The spring piece 17 engages with the inner wall of the connector groove 15.
[0025] like Figure 2-4 As shown, a stop bar 16 is fixedly connected to the upper part of the protective shell 12 near the insertion slot 15 to limit the spring piece 17 and prevent the insertion piece 14 from shifting after installation. The stop bar 16 is semi-cylindrical. The brake wheel 7 slides on the inner wall of the mating groove 2. Multiple sets of heat dissipation holes are opened on both the upper and lower parts of the protective shell 12. A dustproof net is fixedly connected to the inner wall of the protective shell 12 near the insertion hole. Multiple sets of heat dissipation can prevent the electromagnet 9 from overheating. The dustproof net can block dust from entering and extend the service life of the equipment. The guide groove 5 is L-shaped. The bend of the L-shaped guide groove 5 is an arc surface. The right side of the mating groove 2 is an inclined surface, and the lower right side of the mating groove 2 is an arc surface. By cooperating with the arc surface of the mating groove 2 and the guide groove 5, the brake wheel 7 can be limited.
[0026] like Figure 1-3 As shown, the fixing component 6 includes a guide component 62. The lower front and rear sides of the guide component 62 are provided with columnar protrusions. The columnar protrusions of the guide component 62 are inserted into the upper inner wall of the mounting base 1. The guide component 62 can be directly positioned through the columnar protrusions. A fixing bolt 61 is provided through the rear inner wall of the guide component 62. The lower part of the fixing bolt 61 is threaded to the inner wall of the mounting base 1. The guide component 62 can be fixed by a single fixing bolt 61, so as to stably guide the push plate 3.
[0027] Working principle: Under normal operation, the elevator car control terminal energizes the electromagnet 9, generating magnetic force. The output shaft of the electromagnet 9 pulls the push plate 3 forward through magnetic force, causing the brake wheel 7 to separate from the car guide rail and be in a non-braking state. When the elevator is running normally, the push plate 3 moves forward to trigger the induction switch 10, which sends a feedback signal to the control system to confirm that the safety brake is in a non-braking state.
[0028] When the elevator malfunctions, such as overspeed or power failure, the electromagnet 9 is de-energized and the magnetic force disappears. The spring on the electromagnet 9 pushes the output shaft to move backward. The push plate 3 moves backward under the push of the output shaft of the electromagnet 9, and the guide groove 4 on its upper part slides along the guide 62 of the fixing part 6 to ensure stable movement trajectory.
[0029] When the push plate 3 moves, the L-shaped structure of the guide groove 5 drives the brake wheel 7 to move to the left rear side, so that the brake wheel 7 contacts the car guide rail in the mating groove 2, stopping the elevator on the guide rail. The push plate 3 moves backward to trigger the induction switch 10, which feeds back the braking signal to the control system to confirm that the safety clamp has been activated.
[0030] The protective shell 12 is inserted into the limiting groove 18 of the mounting plate a8 via the J-shaped connector 14. The arc-shaped part of the spring piece 17 is fixed by being inserted into the connector groove 15. The baffle 16 prevents the spring piece 17 from shifting, which improves the stability of the connector 14. It is easy to install and also easy to disassemble and maintain. The heat dissipation holes at the top and bottom of the protective shell 12 can dissipate the heat of the electromagnet 9 when it is working. The dustproof mesh on the inner wall prevents dust from entering and extends the service life of the equipment.
Claims
1. A small electronically triggered safety clamp, comprising a mounting base (1), characterized in that: The upper part of the mounting base (1) is provided with a mating groove (2). The front side of the mounting base (1) is fixedly connected to the mounting plate a (8). The left side of the mounting plate a (8) is fixedly connected to the mounting plate b (11) and the induction switch (10). The outer side of the mounting plate a (8) is fixedly connected to the electromagnet (9). The output end of the electromagnet (9) passes through the inner wall of the mounting plate b (11). The rear side of the output shaft of the electromagnet (9) is fixedly connected to the push plate (3). The upper part of the push plate (3) is provided with a guide groove (4) through which the guide groove (4) is slidably connected to the inner wall of the guide groove (4) and a fixing piece (6) fixed to the upper part of the mounting base (1). The left side of the push plate (3) is provided with a guide groove (5). The inner wall of the guide groove (5) is slidably connected to a brake wheel (7). The trigger end of the induction switch (10) contacts the front side of the push plate (3). A protective shell (12) is inserted into the outer side of the mounting plate a (8). A limit groove (18) is opened on the right side of the mounting plate a (8). A plug hole (13) is opened on the front right side of the protective shell (12). A J-shaped plug (14) is inserted into the inner wall of the plug hole (13). The plug (14) is inserted into the inner wall of the limit groove (18). A spring piece (17) is fixedly connected to the inner wall of the plug piece (14). A plug groove (15) is opened on the right side of the protective shell (12). The spring piece (17) is snapped into the inner wall of the plug groove (15).
2. The miniature electronically triggered safety clamp according to claim 1, characterized in that: The protective shell (12) is fixedly connected to a baffle (16) near the upper part of the insertion groove (15). The baffle (16) is set in a semi-cylindrical shape, and the brake wheel (7) slides on the inner wall of the mating groove (2).
3. The miniature electronically triggered safety clamp according to claim 1, characterized in that: Multiple sets of heat dissipation holes are provided on the upper and lower parts of the protective shell (12), and a dustproof net is fixedly connected to the inner wall of the protective shell (12) near the insertion hole.
4. A small electronically triggered safety clamp according to claim 1, characterized in that: The upper part of the spring piece (17) is vertically arranged, and the lower part of the spring piece (17) is arc-shaped.
5. A small electronically triggered safety clamp according to claim 1, characterized in that: The guide groove (5) is set in an L shape, and the L-shaped bend of the guide groove (5) is an arc surface.
6. A miniature electronically triggered safety clamp according to claim 1, characterized in that: The right side of the mating groove (2) is an inclined surface, and the lower right side of the mating groove (2) is an arc surface.
7. A small electronically triggered safety clamp according to claim 1, characterized in that: The fixing member (6) includes a guide member (62), the lower front and rear sides of the guide member (62) are provided with columnar protrusions, and the columnar protrusions of the guide member (62) are inserted into the upper inner wall of the mounting base (1).
8. A small electronically triggered safety clamp according to claim 7, characterized in that: A fixing bolt (61) is provided through the rear inner wall of the guide member (62), and the lower part of the fixing bolt (61) is threadedly connected to the inner wall of the mounting base (1).