Electric trigger type safety tongs compact in structure

Abstract

The utility model discloses an electric trigger type safety gear compact in structure, and belongs to the field of elevator accessories, the electric trigger type safety gear comprises a gear body, a swing plate, a brake wheel, a reset electromagnet and a trigger mechanism, and the gear body is provided with a jaw corresponding to a car guide rail; the swing plate is hinged to the face, corresponding to the jaw, of the caliper body, the brake wheel is movably installed on the swing plate, and the brake wheel is located in the jaw. The side, corresponding to the brake wheel, of the caliper body is fixedly provided with a supporting plate, and the end, away from the caliper body, of the supporting plate is provided with a mounting part bent towards the top of the caliper body. According to the electric trigger type safety tongs, the reset electromagnet and the trigger spring are installed at the top end of the tongs body through the installation part of the supporting plate, the transverse width size of the safety tongs can be effectively reduced, and the safety tongs can be suitable for being installed and used in a narrow space.

Description

Technical Field

[0001] The present application relates to the technical field of elevator accessories, and specifically to an electrically triggered safety gear with a compact structure. Background Art

[0002] The safety gear is a safety protection device for elevators. The elevator safety gear device is a safety device that, under the control of a speed limiter, when the elevator speed exceeds the limit (or rated) speed set by the elevator speed limiter, or in the case of a break or slack of the suspension rope, urgently stops the car and clamps it on the guide rail. It provides an effective protection for the safe operation of the elevator and is generally installed on the car frame or counterweight frame.

[0003] Chinese Utility Model Patent with Publication No. CN212832237U discloses an electrically triggered safety gear. The electrically triggered safety gear includes a clamp base, a swing plate, a brake wheel, and an electromagnet; the clamp base has a jaw for clamping on the car guide rail; the swing plate is hinged on the side of the clamp base with the jaw, the electromagnet is fixedly installed at one end of the clamp base corresponding to the swing plate and is used to push the swing plate to swing by energization; the brake wheel is movably installed on the swing plate, and the brake wheel is located inside the jaw and contacts the car guide rail as the swing plate swings. This safety gear triggers the action of the swing plate by controlling the electromagnet, and then makes the brake wheel approach the car guide rail and contact the car guide rail for braking, which can quickly trigger the elevator and achieve car braking. However, its electromagnet and reset device are horizontally installed at a position below one side of the clamp base, making the overall width dimension of the safety gear relatively large and difficult to adapt to the installation and use in narrow spaces.

[0004] Therefore, the present application provides an electrically triggered safety gear with a compact structure to solve the above problems. Summary of the Utility Model

[0005] The present application provides an electrically triggered safety gear with a compact structure, aiming to solve the problem that the existing electrically triggered safety gear has a relatively large overall width dimension and is difficult to adapt to the installation and use in narrow spaces as proposed in the background art.

[0006] To achieve the above object, the present application provides the following technical solution: An electrically triggered safety gear with a compact structure includes a clamp body, a swing plate, a brake wheel, a reset electromagnet, and a trigger spring. The clamp body has a jaw corresponding to the car guide rail; the swing plate is hinged on the side of the clamp body corresponding to the jaw, the brake wheel is movably installed on the swing plate, and the brake wheel is located inside the jaw.

[0007] Different from the existing electric trigger safety clamp, a support plate is fixedly installed on one side of the clamp body corresponding to the brake wheel. One end of the support plate away from the clamp body has a mounting portion bent towards the top of the clamp body. The reset electromagnet is fixedly installed on the mounting portion and is used to pull the swing plate to move the brake wheel away from the car guide rail in the energized state. The trigger spring is sleeved outside the reset electromagnet, and both ends of the trigger spring are fixedly connected to the mounting portion and the swing plate respectively. Wherein, the trigger spring is used to drive the swing plate to swing to move the brake wheel closer to the car guide rail in the state that the reset electromagnet loses power. In this way, the reset electromagnet and the trigger spring are installed at the top end of the clamp body by using the mounting portion of the support plate, thereby reducing the lateral width dimension of the safety clamp, so that the safety clamp can be adapted to the installation and use in a narrow space.

[0008] In order to enable the reset electromagnet and the trigger spring to act on the swing plate and make the swing plate act correspondingly; preferably, the swing plate has a support portion bent towards the top end of the clamp body. The support portion has a connecting portion bent towards the surface of the clamp body corresponding to the clamp mouth, and the connecting portion is hinged to the clamp body. The support portion is parallel to the top surface of the clamp body, and both ends of the reset electromagnet and the trigger spring away from the mounting portion are connected to the support portion.

[0009] In order to avoid the support portion affecting the installation of the clamp body and enable the clamp mouth of the clamp body to clamp on the car guide rail; preferably, a relief groove is provided at the position of the support portion corresponding to the clamp mouth.

[0010] In order to enable the swing plate to swing on the surface of the clamp body corresponding to the clamp mouth so that it can drive the brake wheel to move closer to or away from the car guide rail; preferably, a rotating shaft penetrating through the connecting portion is fixedly installed on the clamp body, and the connecting portion is rotatably connected to the rotating shaft.

[0011] In order to improve the stability of the floating of the swing plate and avoid the plane of the swing plate moving away from the surface of the clamp body; preferably, a positioning pin penetrating through the swing plate is fixedly installed on the clamp body, and a long waist hole is provided at the position of the swing plate corresponding to the positioning pin.

[0012] In order to enable the brake wheel to move on the swing plate and make the brake wheel contact or disengage from the car guide rail; preferably, a guide groove is provided on the swing plate, and a connecting shaft located in the guide groove is provided at one end of the brake wheel away from the clamp body.

[0013] When the control of the reset electromagnet fails, it is easy to cause the swing plate to fail to reset, resulting in the elevator car being unable to resume braking. To ensure the safety of the safety clamp and the stability of the elevator car operation; preferably, the electric trigger type safety clamp further includes a manual reset device fixedly arranged on the installation part, and the manual reset device is used to drive the swing plate to swing to move the brake wheel away from the car guide rail when the control of the reset electromagnet fails.

[0014] To achieve manual reset of the swing plate when the control box of the reset electromagnet fails; preferably, the manual reset device includes a fixed block fixedly arranged at one end of the swing plate close to the support part, a cable sleeve fixedly installed on the installation part, a lifting part located at one end of the cable sleeve far from the installation part, and a cable passing through the cable sleeve and connected to the fixed block and the lifting part at both ends respectively.

[0015] To verify the trigger state and the recovery state; preferably, a safety switch for contacting the support part is fixedly installed at a position on the top of the clamp body far from the reset electromagnet and the trigger spring.

[0016] The electric trigger type safety clamp has a simple structure and is convenient to use. By setting the support plate and the swing plate, the reset electromagnet and the trigger spring are installed at the upper end position of the clamp body by using the support part of the support plate. When the electromagnet loses power, the trigger spring pushes the swing plate to make the brake wheel contact the car guide rail. When the reset electromagnet is powered on, it pulls the swing plate to make the brake wheel disengage from the car guide rail. At the same time, it can effectively reduce the width dimension of the safety clamp, so that the safety clamp can be suitable for installation and use in narrow spaces.

[0017] The trigger type safety clamp is provided with a manual reset device. When the control of the reset electromagnet gets out of control, the cable can be pulled to make the cable pull the swing plate, so that the swing plate drives the brake wheel to disengage from the car guide rail, thus restoring braking. Description of the Drawings

[0018] Figure 1 Schematic three-dimensional structure of a compact electric trigger type safety clamp Figure 1 ;

[0019] Figure 2 Schematic three-dimensional structure of a compact electric trigger type safety clamp Figure 2 ;

[0020] Figure 3 Schematic front view structure of a compact electric trigger type safety clamp;

[0021] Figure 4 Schematic principle structure of a compact electric trigger type safety clamp when triggered;

[0022] Figure 5 It is a schematic diagram of the principle structure of a compact electric trigger safety clamp during reset.

[0023] In the figure:

[0024] 1. Caliper body;

[0025] 11. Jaw;

[0026] 12. Rotating shaft;

[0027] 13. Positioning pin;

[0028] 2. Swing plate;

[0029] 21. Support part;

[0030] 211. Relief groove;

[0031] 22. Connecting part;

[0032] 23. Long oval hole;

[0033] 24. Guide groove;

[0034] 3. Brake wheel;

[0035] 4. Reset electromagnet;

[0036] 5. Trigger spring;

[0037] 6. Support plate;

[0038] 61. Installation part;

[0039] 7. Manual reset device;

[0040] 71. Fixed block;

[0041] 72. Cable sleeve;

[0042] 73. Lifting part;

[0043] 74. Cable;

[0044] 8. Safety switch. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0046] Embodiment 1

[0047] This embodiment provides an electrically triggered safety clamp with a compact structure, as Figure 1 , Figure 2 and Figure 3 shown, including a clamp body 1, a swing plate 2, a brake wheel 3, a reset electromagnet 4 and a trigger spring 5. The clamp body 1 has a jaw 11 corresponding to the car guide rail; the swing plate 2 is hinged to one side of the clamp body 1 corresponding to the jaw 11, the brake wheel 3 is movably installed on the swing plate 2, and the brake wheel 3 is located inside the jaw 11.

[0048] On one side of the clamp body 1 corresponding to the brake wheel 3, a support plate 6 is fixedly installed. One end of the support plate 6 away from the clamp body 1 has a mounting portion 61 bent towards the top of the clamp body 1. The reset electromagnet 4 is fixedly installed on the mounting portion 61 and is used to pull the swing plate 2 in the energized state to move the brake wheel 3 away from the car guide rail. The trigger spring 5 is sleeved outside the reset electromagnet 4, and both ends of the trigger spring 5 are fixedly connected to the mounting portion 61 and the swing plate 2 respectively; wherein, the trigger spring 5 is used to drive the swing plate 2 to swing in the de-energized state of the reset electromagnet 4 to move the brake wheel 3 closer to the car guide rail.

[0049] As Figure 4 and Figure 5 shown, during braking, control the reset electromagnet 4 to de-energize, so that the trigger spring 5 pushes the swing plate 2 to rotate on the clamp body 1, driving the brake wheel 3 closer to the car guide rail. When the brake wheel 3 contacts the car guide rail, it moves upward on the swing plate 2, forcing the inner wall of the jaw 11 of the clamp body 1 on the side away from the brake wheel 3 to contact the car guide rail, thereby clamping the car guide rail with the cooperation of the brake wheel 3 to achieve the braking of the elevator car; during the recovery of braking, control the reset electromagnet 4 to energize, and the reset electromagnet 4 pulls the swing plate 2 to rotate in the reverse direction, driving the brake wheel 3 away from the car guide rail, thereby releasing the car guide rail and enabling the elevator car to resume braking.

[0050] Specifically, the swing plate 2 is provided with a support portion 21 bent towards the top end of the pliers body 1; the support portion 21 is provided with a connecting portion 22 bent towards the side of the pliers body 1 corresponding to the pliers mouth 11. A rotating shaft 12 passing through the connecting portion 22 is fixedly installed on the pliers body 1, and the connecting portion 22 is rotatably connected to the rotating shaft 12; the support portion 21 is parallel to the top surface of the pliers body 1, and one ends of the reset electromagnet 4 and the trigger spring 5 away from the installation portion 61 are both connected to the support portion 21. In this way, the swing plate 2 is hinged to the pliers body 1 through the connecting portion 22 and the rotating shaft 12, and the reset electromagnet 4 and the trigger spring 5 can act on the swing plate 2 through the support portion 21, so that when the reset electromagnet 4 is energized, it can pull the swing plate 2 to rotate on the pliers body 1 to move the brake wheel 3 away from the car guide rail to resume braking, and the trigger spring 5 can push the swing plate 2 to rotate on the pliers body 1 to move the brake wheel 3 close to the car guide rail for braking when the reset electromagnet 4 is de-energized.

[0051] Among them, in order to prevent the support portion 21 from affecting the installation of the pliers body 1 and enabling the pliers mouth 11 to clamp on the car guide rail; a relief groove 211 is provided at the position of the support portion 21 corresponding to the pliers mouth 11.

[0052] It should be noted that, in order to improve the working stability of the swing plate 2; a positioning pin 13 passing through the swing plate 2 is fixedly installed on the pliers body 1, and a long slot 23 is provided at the position of the swing plate 2 corresponding to the positioning pin 13. When the reset electromagnet 4 is energized to pull the swing plate 2 to move or the reset electromagnet 4 is de-energized and the trigger spring 5 pushes the swing plate 2 to move, through the cooperation of the positioning pin 13 and the long slot 23, the swing plate 2 is in contact with the surface of the pliers body 1, avoiding the offset of the swing plate 2, thereby ensuring the working stability of the swing plate 2.

[0053] It is worth mentioning that, in order to reduce the damage to the car guide rail during braking; a guide groove 24 is provided on the swing plate 2, and a connecting shaft 31 located in the guide groove 24 is provided at one end of the brake wheel 3 away from the pliers body 1. Through the cooperation of the guide groove 24 and the connecting shaft 31, the brake wheel 3 can move on the swing plate 2. When the brake wheel 3 contacts the car guide rail, under the frictional force between the car guide rail and the brake wheel 3, the brake wheel 3 can roll on the swing plate 2, thereby buffering the stress generated at the moment of contact between the brake wheel 3 and the car guide rail, avoiding the damage of the car guide rail caused by the instantaneous contact stress, and further improving the safety of using the safety clamp.

[0054] Embodiment 2

[0055] Different from Embodiment 1, in order to enable the safety clamp to resume braking when the control of the reset electromagnet 4 gets out of control; as Figure 1 、 Figure 2 and Figure 3As shown, the electric trigger safety clamp further includes a manual reset device 7 fixedly arranged on the installation part 61. The manual reset device 7 is used to drive the swing plate 2 to swing when the control of the reset electromagnet 4 fails, so that the brake wheel 3 moves away from the car guide rail. Specifically, the manual reset device 7 includes a fixed block 71 fixedly arranged at one end of the swing plate 2 close to the support part 21, a cable sleeve 72 fixedly installed on the installation part 61, a lifting part 73 located at one end of the cable sleeve 72 away from the installation part 61, and a cable 74 passing through the cable sleeve 72 and connected to the fixed block 71 and the lifting part 73 at both ends respectively.

[0056] When the control of the reset electromagnet 4 fails and it is impossible to control the power-off of the reset electromagnet 4, the lifting part 73 can be pulled manually or by a lifting device, so that the lifting part 73 pulls the cable 74, so that the cable 74 moves in the cable sleeve 72 against the thrust of the trigger spring 5, and then pulls the fixed block 71, so that the fixed block 71 drives the swing plate 2 to rotate, driving the brake wheel 3 away from the car guide rail, releasing the car guide rail by the brake wheel 3, and thus restoring the braking.

[0057] Embodiment 3

[0058] Different from Embodiment 1 and Embodiment 2, in order to monitor the state of the safety clamp; as Figure 1 、 Figure 2 and Figure 3 shown, a safety switch 8 for contacting the support part 21 is fixedly installed at a position on one side of the top of the clamp body 1 away from the reset electromagnet 4 and the trigger spring 5.

[0059] During braking, the reset electromagnet 4 loses power, and the trigger spring 5 pushes the swing plate 2 to rotate on the clamp body 1, so that the brake wheel 3 moves closer to the car guide rail; at this time, the support part 21 of the swing plate 2 disengages from the safety switch 8, and the safety switch 8 feeds back a first signal to the control system, indicating that the safety clamp is triggered; and when the braking is restored, the reset electromagnet 4 is powered on to pull the swing plate 2 to rotate, so that the brake wheel 3 disengages from the car guide rail. When the support part 21 contacts the safety switch 8, a second signal is fed back to the control system, indicating that the safety clamp has restored braking. In this way, the monitoring of the state of the safety clamp is realized, thus ensuring the stability of the operation of the safety clamp.

[0060] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its concept of the present application, makes equivalent replacements or changes, and should be covered within the protection scope of the present application.

Claims

1. A compact electrically triggered safety clamp, comprising a clamp body (1), a swing plate (2), a brake wheel (3), a reset electromagnet (4) and a trigger spring (5), wherein the clamp body (1) is provided with a jaw opening (11) corresponding to a car guide rail; the swing plate (2) is hinged to a side of the clamp body (1) corresponding to the jaw opening (11), the brake wheel (3) is movably mounted on the swing plate (2), and the brake wheel (3) is located inside the jaw opening (11); Features: A support plate (6) is fixedly mounted on one side of the caliper body (1) corresponding to the brake wheel (3); an end of the support plate (6) away from the caliper body (1) has a mounting portion (61) bent toward the top of the caliper body (1); The reset electromagnet (4) is fixedly mounted on the mounting portion (61) and is used to pull the swing plate (2) in a power-on state so as to move the brake wheel (3) away from the car guide rail; The trigger spring (5) is sleeved on the outside of the reset electromagnet (4), and the two ends of the trigger spring (5) are fixedly connected to the mounting portion (61) and the swing plate (2) respectively; The trigger spring (5) is used to drive the swing plate (2) to swing when the reset electromagnet (4) is in a power-off state, so that the brake wheel (3) moves closer to the car guide rail.

2. The compact electrically triggered safety clamp according to claim 1, characterized in that: The swing plate (2) has a support portion (21) bent toward the top end of the pliers body (1); The support portion (21) has a connecting portion (22) bent toward a side of the pliers body (1) corresponding to the pliers opening (11), and the connecting portion (22) is hingedly connected to the pliers body (1); The support portion (21) is parallel to the top surface of the caliper body (1), and the ends of the reset electromagnet (4) and the trigger spring (5) away from the mounting portion (61) are both connected to the support portion (21).

3. The compact electrically triggered safety clamp according to claim 2, characterized in that: The support portion (21) has a clearance groove (211) at a position corresponding to the jaw (11).

4. The compact electrically triggered safety clamp according to claim 2, characterized in that: A rotating shaft (12) penetrating the connecting portion (22) is fixedly mounted on the pliers body (1), and the connecting portion (22) is rotatably connected to the rotating shaft (12).

5. The compact electrically triggered safety clamp according to claim 2, characterized in that: A positioning pin (13) penetrating the swing plate (2) is fixedly mounted on the pliers body (1), and a long waist hole (23) is provided on the swing plate (2) at a position corresponding to the positioning pin (13).

6. The compact electrically triggered safety clamp according to claim 2, characterized in that: The swing plate (2) is provided with a guide groove (24), and the end of the brake wheel (3) away from the caliper body (1) is provided with a connecting shaft (31) located in the guide groove (24).

7. The compact electrically triggered safety clamp according to claim 2, characterized in that: The electrically triggered safety clamp further comprises a manual reset device (7) fixedly arranged on the mounting portion (61), wherein the manual reset device (7) is used to drive the swing plate (2) to swing so that the brake wheel (3) moves away from the car guide rail when the reset electromagnet (4) fails to control.

8. The compact electrically triggered safety clamp according to claim 7, characterized in that: The manual reset device (7) comprises a fixing block (71) fixedly arranged on one end of the swing plate (2) close to the support portion (21), a rope sleeve (72) fixedly mounted on the mounting portion (61), a pulling portion (73) located at one end of the rope sleeve (72) away from the mounting portion (61), and a pulling rope (74) penetrating the rope sleeve (72) and having two ends respectively connected to the fixing block (71) and the pulling portion (73).

9. The compact electrically triggered safety clamp according to claim 2, characterized in that: A safety switch (8) for contacting the support portion (21) is fixedly mounted on the top of the clamp body (1) at a position on one side away from the reset electromagnet (4) and the trigger spring (5).

Images