Electronic safety tongs

Abstract

The invention discloses an electronic safety gear, relates to the technical field of elevator braking equipment, and solves the problems that an existing electronic safety gear is long and not compact enough in structure. The elevator clamp comprises a clamp body, the clamp body is provided with a moving space allowing a guide rail of an elevator to vertically penetrate through and a roller path distributed on one side of the moving space, and the width of the roller path is gradually reduced from bottom to top; a trigger plate; the electronic driving part is arranged on one side of the clamp body; the rolling column is movably arranged in the rolling path; and a torsion spring. The safety tongs have the advantages of being simple and compact in structure and the like, the trigger plate is located on the side face of the tongs body instead of directly driving the pin roller to move up and down, the pin roller is stirred through the torsional spring, the pin roller can make contact with the guide rail, therefore, the moving stroke of the trigger plate is shorter, the overall length of the electronic safety tongs is greatly shortened, and the safety tongs are convenient to use. And the structure is more compact, and the safety and reliability are better.

Description

Technical Field

[0001] This invention relates to the field of elevator braking equipment technology, and in particular to an electronic safety clamp. Background Technology

[0002] The safety brake is a crucial safety component of elevator equipment, playing a vital role in ensuring safety in the event of elevator overspeed or loss of control. The safety brake mechanism operates by having the speed governor engage, causing the rope clamp to grip the speed governor rope. As the car descends, the speed governor rope pulls the safety brake linkage mechanism, activating the safety brake linkage and engaging the safety brake braking elements against the guide rails. This causes the safety brake braking elements on both sides of the guide rails to simultaneously clamp onto the rails, bringing the car to a complete stop.

[0003] In existing technologies, such as the electronic safety clamp disclosed in CN119898674A, the electromagnet is generally located at the lower end of the clamp body. During operation, the electromagnet directly pushes the roller, which rolls along the inclined surface of the clamp body and gradually approaches and contacts the guide rail. Under the action of friction, the roller gradually moves upward. Under the action of the inclined surface, the roller cooperates with the friction block to clamp the guide rail, thereby braking. Because the electromagnet pushes the roller upward from the bottom of the clamp body, the driving end of the electromagnet needs a long stroke, making the overall length of the electronic safety clamp very long and the clamp structure not compact enough. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by designing an electronic safety clamp that addresses the issues of excessive length and insufficient compactness in existing electronic safety clamps.

[0005] The technical solution of the present invention to achieve the above objectives is an electronic safety clamp, comprising: The clamp body has an active space for the elevator guide rail to pass through vertically and a roller track distributed on one side of the active space. The width of the roller track gradually decreases from bottom to top. The inner wall of the active space away from the roller track has a braking surface that rubs against the guide rail. A trigger plate, wherein the trigger plate is disposed on one side of the clamp body; An electronic drive unit, which is disposed on one side of the clamp body, is used to control the up and down movement of the trigger plate; The roller is movably disposed within the raceway and can gradually approach and press against the guide rail as it moves from bottom to top. A torsion spring is rotatably connected to the clamp body, with one end of the torsion spring abutting against the side wall of the clamp body and the other end bent and extending to the moving path of the trigger plate. During the process of controlling the trigger plate to move upward, the electronic drive unit can pull the torsion spring to deflect and accumulate energy, causing the torsion spring to disengage from the roller; when the trigger plate removes the tension on the torsion spring, the torsion spring releases its stored energy, deflects to the side where the roller is located and squeezes the roller, so that the roller can gradually contact the guide rail, while pulling the trigger plate to move downward.

[0006] Furthermore, a bracket is provided on the outer side of the clamp body, and an installation area is formed between the bracket and the clamp body. The electronic drive component is located in the installation area and fixed on the bracket.

[0007] Furthermore, a switch is provided on the outside of the clamp body for controlling the power supply or power cut-off of the elevator control system. The switch is fixedly installed on the outside of the bracket and away from the electronic drive component. The trigger plate can trigger the switch contacts during downward movement. The extension and retraction direction of the switch contacts is perpendicular to the movement direction of the trigger plate.

[0008] Furthermore, the two ends of the bracket extend and close the upper and lower ends of the raceway.

[0009] Furthermore, the portion of the bracket near the widest part of the raceway is bent inwards to form a positioning part.

[0010] Furthermore, the bracket has clearance holes to facilitate the passage of the trigger plate.

[0011] Furthermore, one end of the trigger plate is bent vertically and extends in the direction of the switch to form a trigger part, and the other end of the trigger plate is bent to form a limiting part. One end of the torsion spring is bent and extends into the limiting part on the side away from the torsion spring.

[0012] Furthermore, the front end of the trigger section of the trigger plate is bent away from the contact side of the switch.

[0013] Furthermore, the side of the raceway away from the active space has a receiving space, and a positioning post is provided in the receiving space. The torsion spring is rotatably connected to the positioning post. One end of the torsion spring abuts against the upper side wall of the receiving space, and the other end is bent to form a V-shape. One end of the V-shape is bent and extends to the moving path of the trigger plate when it moves upward.

[0014] Furthermore, the clamp body is provided with a cover plate for enclosing the torsion spring and roller.

[0015] Its advantages over existing technologies are: The safety clamp provided in this invention has the advantages of simple and compact structure. The electronic safety clamp controls the up and down movement of the trigger plate through an electronic drive. When the electronic drive controls the trigger plate to move upward, the trigger plate can pull the torsion spring to deflect and accumulate energy, causing the torsion spring to disengage from the roller. When the electronic drive stops controlling the trigger plate to move upward, the trigger plate no longer pulls the torsion spring. At this time, the tension on the torsion spring disappears, the stored energy of the torsion spring is released, and it deflects towards the side where the roller is located and squeezes and pushes the roller, so that the roller contacts the guide rail. Under the action of friction, the roller moves upward along the raceway and finally cooperates with the braking surface on the side of the moving space to clamp the guide rail, thereby playing a braking role and improving safety and reliability.

[0016] Because the trigger plate is located on the side of the clamp body, it does not directly drive the roller to move up and down. Instead, when the trigger plate moves upward, it pulls the torsion spring to accumulate energy. Then, the energy of the torsion spring is released to push the roller, so that the roller contacts the guide rail. Therefore, the stroke is shorter, which greatly shortens the overall length of the electronic safety clamp and makes the structure more compact.

[0017] As the torsion spring pulls the trigger plate downwards, the lower end of the trigger plate triggers the switch contacts, laterally squeezing the switch contacts and causing them to retract inwards, thus triggering the switch. The switch then directly cuts off power to the elevator's control system.

[0018] The direction of movement of the trigger plate is perpendicular to the direction of extension and retraction of the switch contacts. The trigger plate cannot move laterally, so the side of the trigger plate will block the switch contacts, preventing the switch contacts from rebounding and keeping the elevator control system in a de-energized state. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the electronic safety clamp; Figure 2 This is a schematic diagram of the electronic safety clamp removing the cover plate; Figure 3 This is a schematic diagram of the clamp body in an electronic safety clamp; Figure 4 This is a schematic diagram of the trigger plate in an electronic safety clamp; Figure 5 This is a schematic diagram showing the electronic safety clamp engaging with the guide rail when it is not in operation. Figure 6 This is a schematic diagram showing the electronic safety clamp in operation and in conjunction with the guide rail.

[0020] In the diagram, 1. Clamp body; 101. Activity space; 1011. Braking surface; 102. Raceway; 103. Accommodation space; 2. Electronic drive component; 3. Trigger plate; 31. Limiting part; 32. Triggering part; 4. Roller; 5. Torsion spring; 6. Switch; 61. Contact; 7. Bracket; 701. Positioning part; 702. Clearance hole; 8. Cover plate; 9. Positioning pin; 10. Guide rail. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 , Figure 2 As shown, a preferred embodiment of the present invention provides an electronic safety clamp, which mainly includes: clamp body 1, switch 6, electronic drive unit 2, trigger plate 3, bracket 7, roller 4 and torsion spring 5, etc.

[0023] See Figure 3 The clamp body 1 is a cubic structure, integrally machined. A large groove is located on the front of the clamp body 1, forming an active space 101, a raceway 102, and a receiving space 103. The receiving space 103 and the active space 101 are located on the left and right sides of the raceway 102, respectively, and are connected to the raceway 102. The depth of the active space 101 is greater than the depth of the raceway 102, and the depth of the raceway 102 is greater than the depth of the receiving space 103.

[0024] The roller 4 is placed inside the raceway 102, and the axial thickness of the roller 4 generally does not exceed the depth of the raceway 102, but is greater than the depth difference between the raceway 102 and the receiving space 103. The roller 4 can be a wheel or a cylinder.

[0025] The overall shape of the raceway 102 is wedge-shaped, with an inclined surface on the side away from the active space 101. The roller 4 can roll along this inclined surface to gradually approach the guide rail 10 within the active space 101. The diameter of the roller 4 is smaller than the width at the widest point of the raceway 102 and smaller than the width at the narrowest point of the raceway 102.

[0026] The movable space 101 is vertically continuous, and the guide rail 10 passes through the clamp body 1 and exits from both the upper and lower ends of the movable space 101. On the opposite side of the raceway 102, the inner wall of the movable space 101 has a braking surface 1011, which is a friction surface. As the roller 4 rolls upward along the raceway 102, the roller 4 gradually approaches the guide rail 10 under the action of the inclined surface, and finally the roller 4 cooperates with the braking surface 1011 to clamp the guide rail 10.

[0027] like Figure 2 As shown, the bracket 7 is a U-shaped structure formed by bending a long plate. The bracket 7 is fixedly installed on the side of the clamp body 1 near the receiving space 103. The upper and lower ends of the bracket 7 extend forward and cover the upper and lower ends of the raceway 102 to confine the roller 4 within the raceway 102. The bracket 7 is fixedly connected to the clamp body 1 by bolts.

[0028] The lower end of the bracket 7 (the end closest to the raceway 102) is partially bent inward into the raceway 102, forming a positioning part 701. Under its own weight, the roller 4 hangs down at the widest point of the raceway 102 (i.e., the lower end of the raceway 102), and, under the action of the positioning part 701 at the lower end of the bracket 7, moves away from the guide rail 10 (see [reference]). Figure 5 This ensures that when the safety clamp is unlocked, the roller 4 does not contact the guide rail 10.

[0029] like Figure 2 As shown, the U-shaped bracket 7 and the outer side of the clamp body 1 enclose a mounting area. The electronic drive unit 2 and the trigger plate 3 are both located within this mounting area.

[0030] In this embodiment, the electronic drive component 2 is an electromagnet. In other embodiments, the electronic drive component 2 can also be an electric cylinder, a motor, or the like.

[0031] In this embodiment, the electromagnet is located in the mounting area outside the clamp 1 and is fixed to the bracket 7 with screws. The electromagnet is vertically fixed. The electromagnet includes a coil and an iron core. The iron core is inserted into the coil, and the lower end of the iron core is connected to the trigger plate 3 with screws. The middle part of the trigger plate 3 is connected to the iron core of the electromagnet.

[0032] See Figure 4 One end of the trigger plate 3 is bent at 90° and extends vertically downward to form the trigger part 32. The other end is bent at an angle greater than 90° to form the limiting part 31.

[0033] like Figure 2 As shown, a positioning post 9 is provided in the receiving space 103, and the through hole on the torsion spring 5 is rotatably connected to the positioning post 9. One end of the torsion spring 5 abuts against the upper side wall of the receiving space 103, and the other end extends downward for an appropriate length, then bends into a V shape, then extends into the installation area, and finally bends and extends along the depth direction of the installation area to the back side of the limiting part 31, hooking the trigger plate 3.

[0034] The upper end of the torsion spring 5 abuts against the upper side wall of the accommodating space 103. Therefore, when the torsion spring 5 deflects, only the V-shaped part of the torsion spring 5 will deflect around the positioning post 9 and come into contact with the roller 4.

[0035] See also Figures 5-6When the coil of the electromagnet is energized, it drives the iron core to move upward, thereby causing the trigger plate 3 to move upward. The limiting part 31 on the trigger plate 3 will pull the torsion spring 5, causing the V-shaped part of the torsion spring 5 to deflect clockwise, accumulating energy, and preventing the torsion spring 5 from moving the roller 4.

[0036] When the elevator overspeeds, the coil is de-energized, and the stored energy in the torsion spring 5 is released. During the energy release process, the V-shaped part of the torsion spring 5 will deflect counterclockwise. In this process, the torsion spring 5 will pull the trigger plate 3 downward, and the lower end of the trigger plate 3 will press the contact of the switch 6 in. On the other hand, the V-shaped part of the torsion spring 5 will push the roller 4 upward to touch the guide rail. After contacting the guide rail, the roller 4 will be driven by the guide rail to continue to move upward under the action of friction.

[0037] The roller 4 will roll obliquely upward along the raceway 102. During the upward movement of the roller 4, the safety clamp will move laterally (perpendicular to the length direction of the guide rail 10). The braking surface 1011 on one side of the active space 101 will gradually press against the guide rail 10. At this time, the roller 4 and the braking surface 1011 will cooperate to clamp the two sides of the guide rail 10, thereby braking.

[0038] In other embodiments, a tension spring can be added within the installation area. The upper end of the tension spring is connected to the trigger plate 3, and the lower end is connected to the bracket 7. When the coil is energized, the iron core pulls the trigger plate 3 upwards, at which point both the torsion spring 5 and the tension spring accumulate energy. When the coil is de-energized, the torsion spring 5 releases energy and pulls the trigger plate 3 downwards; at this time, the tension spring also releases energy, pulling the trigger plate 3 downwards. The tension spring design saves energy loss from the torsion spring 5 when pulling the trigger plate 3.

[0039] As long as the trigger plate 3 moves downward a long enough distance, the tension spring will push the torsion spring 5 during the downward movement of the trigger plate 3, further pushing the torsion spring 5 to deflect counterclockwise. The torsion spring 5 will then further push the roller, allowing the roller to quickly contact the guide rail.

[0040] like Figure 2 As shown, switch 6 is located on the lower side of clamp body 1 and is fixedly mounted on bracket 7. The extension and retraction direction of contact 61 of switch 6 is perpendicular to the movement direction of trigger plate 3. Switch 6 is electrically connected to the elevator control system.

[0041] The lower end of the trigger part 32 of the trigger plate 3 is bent and tilted away from the switch 6, forming an inclined surface. When the trigger plate 3 moves downward under the pull of the torsion spring 5, the contact 61 of the switch 6 will contact the inclined surface at the lower end of the trigger part 32, and under the guidance of the inclined surface, it will gradually retract, thereby triggering the switch 6, which will directly cut off the power to the elevator control system.

[0042] Since the trigger plate 3 moves vertically downwards, while the contact 61 of the switch 6 extends and retracts laterally, and the two directions are perpendicular to each other, the rebound force of the contact 61 of the switch 6 will not affect the movement of the trigger plate 3. Since the trigger plate 3 blocks the contact 61 of the switch 6 when it moves downwards, the contact 61 of the switch 6 always remains in a contracted state. At this time, the switch 6 will not cut off the power to the elevator control system.

[0043] If the direction of movement of the trigger plate 3 is consistent with the direction of extension and retraction of the contact 61 of the switch 6, that is, the direction of extension and retraction of the contact 61 of the switch 6 is also vertical, when the trigger plate 3 moves downward, it directly presses down the contact 61 of the switch 6, and the rebound force of the contact 61 of the switch 6 will push the trigger plate 3 upward.

[0044] See Figure 1 A cover plate 8 is provided on the front of the clamp body 1. The cover plate 8 is fixedly installed on the clamp body 1 by screws. The cover plate 8 covers the receiving space 103 and the raceway 102 to enclose the torsion spring 5 and the roller 4 in the receiving space 103 and the raceway 102, so as to prevent the torsion spring 5 and the roller 4 from falling out.

[0045] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts thereof embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. An electronic safety clamp, characterized in that, include: The clamp (1) has an active space (101) through which the elevator guide rail (10) passes vertically and a roller (102) distributed on one side of the active space (101). The width of the roller (102) gradually decreases from bottom to top. The inner wall of the active space (101) away from the roller (102) has a braking surface (1011) that rubs against the guide rail (10). Trigger plate (3), said trigger plate (3) is disposed on one side of clamp body (1); An electronic drive unit (2) is provided on one side of the clamp body (1) and is used to control the up and down movement of the trigger plate (3); Roller (4), which is movably disposed in the raceway (102), and can gradually approach the guide rail (10) and squeeze the guide rail (10) during the upward movement; Torsion spring (5), the torsion spring (5) is rotatably connected to the clamp body (1), one end of the torsion spring (5) abuts against the side wall of the clamp body (1), and the other end is bent and extends to the moving path of the trigger plate (3); During the process of controlling the trigger plate (3) to move upward, the electronic drive (2) can pull the torsion spring (5) to deflect and accumulate energy, so that the torsion spring (5) disengages from the contact with the roller (4); when the trigger plate (3) removes the pulling force on the torsion spring (5), the torsion spring (5) releases the stored energy, deflects to the side where the roller (4) is located and squeezes the roller (4), so that the roller (4) can gradually contact the guide rail (10), and at the same time pull the trigger plate (3) to move downward.

2. The electronic safety clamp according to claim 1, characterized in that, A bracket (7) is provided on the outside of the clamp body (1), and an installation area is formed between the bracket (7) and the clamp body (1). The electronic drive unit (2) is located in the installation area and fixed on the bracket (7).

3. The electronic safety clamp according to claim 2, characterized in that, A switch (6) is provided on the outside of the clamp (1) for controlling the power supply or power cut-off of the elevator control system. The switch (6) is fixedly installed on the outside of the bracket (7) and away from the electronic drive unit (2). The trigger plate (3) can trigger the contact (61) of the switch (6) during downward movement. The extension and retraction direction of the contact (61) of the switch (6) is perpendicular to the movement direction of the trigger plate (3).

4. The electronic safety clamp according to claim 2, characterized in that, The two ends of the bracket (7) extend and close the upper and lower ends of the raceway (102).

5. The electronic safety clamp according to claim 4, characterized in that, The bracket (7) is bent into the raceway (102) at one end near the widest part of the raceway (102) to form a positioning part (701).

6. The electronic safety clamp according to claim 2, characterized in that, The bracket (7) has a clearance hole (702) to facilitate the passage of the trigger plate (3).

7. The electronic safety clamp according to claim 1, characterized in that, One end of the trigger plate (3) is bent vertically and extends in the direction of the switch (6) to form a trigger part (32). The other end of the trigger plate (3) is bent to form a limiting part (31). One end of the torsion spring (5) is bent and extends into the limiting part (31) on the side away from the torsion spring (5).

8. The electronic safety clamp according to claim 7, characterized in that, The front end of the trigger part (32) of the trigger plate (3) is bent toward the contact (61) away from the switch (6).

9. The electronic safety clamp according to claim 1, characterized in that, The side of the raceway (102) away from the activity space (101) has a receiving space (103), and a positioning post (9) is provided in the receiving space (103). The torsion spring (5) is rotatably connected to the positioning post (9). One end of the torsion spring (5) abuts against the upper side wall of the receiving space (103), and the other end is bent to form a V-shaped part. One end of the V-shaped part is bent and extends to the moving path of the trigger plate (3) when it moves upward.

10. The electronic safety clamp according to claim 1, characterized in that, The clamp body (1) is provided with a cover plate (8) for closing the torsion spring (5) and the roller (4).

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