Electronic safety tongs

Abstract

The invention belongs to the technical field of elevator accessories, and particularly relates to an electronic safety gear which comprises a gear body, a brake roller and a friction block, and the gear body is provided with a guide rail channel extending vertically, and roller paths and embedding grooves distributed on the two sides of the guide rail channel; the brake pin roller is arranged on the caliper body through the pin roller cover plate and is movably matched with the roller path; the friction block is mounted in the embedding groove of the caliper body through the limiting cover plate; the electronic safety tongs further comprise an electronic trigger piece installed on the tongs body, and are characterized in that the roller cover plate is provided with a roller movable avoiding strip-shaped hole and a cover plate transverse movable stroke hole, and the convex shaft of the brake roller is inserted into the roller movable avoiding strip-shaped hole; the pin roller cover plate penetrates through the cover plate transverse movement stroke hole through a fixing piece to be fixed to the clamp body so that the pin roller cover plate can be movably installed on the clamp body in a matched mode. In the power-off state, the electronic triggering piece drives the roller cover plate to move transversely to be close to the guide rail channel, and the roller cover plate synchronously links the braking roller to move transversely to be in contact with the elevator guide rail. The electronic safety tongs are better in safety and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of elevator accessories, and in particular relates to an electronic safety clamp. Background Art

[0002] The electronic safety clamp adopts electronic triggering, which has a short response time and effectively improves the safety of the elevator; however, the existing instantaneous electronic safety clamp has a relatively large reset force and is relatively difficult to reset on site. In order to improve the triggering reliability of the electronic safety clamp and the reliable reset after braking, the braking drive and reset structure of the electronic safety clamp need to be further improved. Summary of the invention

[0003] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide an electronic safety clamp that meets one or more of the above-mentioned needs.

[0004] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0005] An electronic safety clamp comprises a clamp body, a brake roller and a friction block, wherein the clamp body has a vertically extending guide rail channel and roller tracks and mounting grooves distributed on both sides thereof; the brake roller is installed on the clamp body through a roller cover plate and movably cooperates with the roller track; the friction block is installed in the mounting groove of the clamp body through a limit cover plate; the electronic safety clamp also comprises an electronic trigger installed on the clamp body, characterized in that the roller cover plate has a roller movable avoidance strip hole and a cover plate transverse movable travel hole, and the convex shaft of the brake roller is plugged into the roller movable avoidance strip hole; the roller cover plate is fixed to the clamp body through a fixing piece penetrating the cover plate transverse movable travel hole, so that the roller cover plate is movably cooperated and installed on the clamp body;

[0006] In the power-off state, the electronic trigger drives the roller cover to move laterally to approach the guide rail channel, and the roller cover synchronously links the brake roller to move laterally until it contacts the elevator guide rail.

[0007] As a preferred solution, the roller movable avoidance strip hole includes a vertical section and a movable avoidance section, the vertical section is used to prevent the brake roller from malfunctioning, and the movable avoidance section is used to avoid the friction braking stroke between the brake roller and the elevator guide rail.

[0008] As a preferred solution, the raceway is an inclined surface structure.

[0009] As a preferred solution, the friction block is a wedge block structure, the bottom of the mounting groove of the caliper body is an inclined surface structure, and the inclined surface of the friction block fits with the bottom of the mounting groove.

[0010] As a preferred solution, the cover plate has at least two transverse movable travel holes, which are staggered.

[0011] As a preferred solution, the transverse movable travel hole of the cover plate is a waist-shaped hole.

[0012] As a preferred solution, the roller cover is bent and extended to form a driving seat, and the driving end of the electronic trigger is drivingly connected to the driving seat of the roller cover for vertically driving the roller cover;

[0013] The driving seat has a transverse travel hole for avoiding relative transverse movement between the roller cover plate and the driving end of the electronic triggering member.

[0014] As a preferred solution, the roller cover plate is provided with an electrical switch. When the roller cover plate synchronously links the brake roller to move laterally before contacting the elevator guide rail, the electrical switch is disengaged from the clamp body to disconnect the electrical switch.

[0015] As a preferred solution, the two ends of the friction block along the guide rail channel direction are respectively in contact with the caliper body and the displacement reset mechanism, and the displacement reset mechanism is used to provide a displacement stroke for the friction block when the safety caliper is reset and to reset the friction block after displacement;

[0016] The displacement reset mechanism includes a guide column and a compression spring. One end of the guide column has a boss, which abuts against the friction block, and the other end passes through the caliper body. The compression spring is sleeved outside the guide column, and its two ends abut against the boss and the caliper body respectively.

[0017] The guide post is linked with the friction block to move along the extension direction of the guide rail channel;

[0018] The limit cover plate has a movable avoidance groove corresponding to the friction block, and the friction block has a guide boss, which is plug-fitted with the movable avoidance groove to avoid lateral and vertical movement of the friction block.

[0019] As a preferred solution, the electronic triggering component is an electromagnet.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The electronic safety clamp of the present invention utilizes an electronic trigger to drive the roller cover plate to move laterally to approach the guide rail channel, and the roller cover plate synchronously links the brake roller to move laterally to contact the elevator guide rail, thereby achieving braking, thereby achieving better safety and reliability;

[0022] (2) The roller movable avoidance strip hole of the present invention is designed with a vertical section, which can prevent the brake roller from malfunctioning and avoid malfunctioning of the safety clamp;

[0023] (3) The present invention is provided with a friction block, the inclined surface of the friction block is in contact with the inclined surface structure of the groove bottom of the embedding groove, which can reduce the reset force of the safety clamp;

[0024] (4) The electrical switch of the present invention is installed on the roller cover plate. When the electromagnet loses power, the roller cover plate moves upward to make the brake roller contact the elevator guide rail and move upward to brake, while disconnecting the electrical switch. When the reset is completed, the electrical switch is turned on. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 1 is a schematic diagram of the structure of an electronic safety clamp according to Embodiment 1 of the present invention;

[0026] Figure 2 1 is a schematic structural diagram of an electronic safety clamp according to Embodiment 1 of the present invention (the roller cover plate and the limit cover plate are omitted);

[0027] Figure 3 is a schematic structural diagram of a clamp body according to Embodiment 1 of the present invention;

[0028] Figure 4 is a schematic structural diagram of the clamp body of Embodiment 1 of the present invention from another viewing angle;

[0029] Figure 5 is a schematic structural diagram of the clamp body of Embodiment 1 of the present invention from another viewing angle;

[0030] Figure 6 is a schematic structural diagram of a roller cover plate according to Embodiment 1 of the present invention;

[0031] Figure 7 It is a schematic structural diagram of the roller cover plate of embodiment 1 of the present invention from another perspective. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings and other implementation methods can be obtained based on these accompanying drawings without creative work.

[0033] Embodiment 1:

[0034] like Figures 1 to 7 As shown, the electronic safety clamp of this embodiment includes a clamp body 1, a brake roller 2, a roller cover plate 3, a friction block 4, a limit cover plate 5, an electromagnet 6 and a displacement reset mechanism.

[0035] The caliper body 1 of this embodiment has a vertically extending guide rail channel 10. The caliper body 1 is located on the right and left sides of the guide rail channel 10 to form a first recess I and a second recess II. The first recess I is used to install the brake roller 2. The bottom of the first recess I is the raceway G of the brake roller 2. The raceway G is an inclined structure. The distance between the top of the raceway G and the guide rail channel 10 is smaller than the distance between the bottom of the raceway G and the guide rail channel 10. The second recess II constitutes an embedding groove for the friction block 4, which is used to install the friction block 4, so that the brake roller 2 and the friction block 4 are respectively located on the left and right sides of the guide rail channel 10 to cooperate with the elevator guide rail braking.

[0036] Specifically, the front side of the first recess I of the caliper body 1 is open, and the front side opening corresponds to the roller cover plate 3 installed on the brake roller 2. The brake roller 2 is movably matched with the raceway G. The rear side of the brake roller 2 is attached to the inner wall of the caliper body 1, and the inner wall of the caliper body 1 is used to guide the brake roller 2. The guide area is large, and the rolling stability of the brake roller 2 is good. The roller cover plate 3 has a roller movable avoidance bar hole 31 and a cover plate transverse movable travel hole 32. The convex shaft on the front side of the brake roller 2 is inserted into the roller movable avoidance bar hole 31 to achieve guiding cooperation. Among them, the circumferential surface of the brake roller 2 can be knurled, grooved or other ways to increase friction to improve the self-locking reliability. The brake roller 2 is movably matched with the raceway G to cooperate with the elevator guide rail brake or release the brake.

[0037] The roller cover plate 3 of this embodiment is fixed to the caliper body 1 by means of fixing bolts 7 penetrating through the transverse movable travel holes 32 of the cover plate, so that the roller cover plate 3 is movably mounted on the caliper body 1. The transverse movable travel holes 32 of the cover plate are waist-shaped holes inclined to the guide rail channel 10, so as to realize the vertical and transverse movement of the roller cover plate 3. In addition, there are two transverse movable travel holes 32 of the cover plate, which are staggered and distributed to improve the structural stability.

[0038] The roller movable avoidance strip hole 31 of this embodiment includes a vertical section 31a and a movable avoidance section 31b. The vertical section 31a is used to prevent the brake roller 2 from malfunctioning, and the movable avoidance section 31b is used to avoid the friction braking stroke between the brake roller 2 and the elevator guide rail. Specifically, from bottom to top, the distance between the movable avoidance section 31b and the guide rail channel becomes smaller and smaller, so that the brake roller 2 and the elevator guide rail can cooperate in braking.

[0039] The two ends of the friction block 4 in the direction of the guide rail channel, i.e., the upper end and the lower end of the friction block, respectively abut against the top wall of the second recess II of the caliper body and the displacement reset mechanism installed on the bottom wall of the second recess II of the caliper body. The friction block 4 is a wedge block structure, and the bottom of the corresponding groove of the friction block is an inclined surface structure X. The inclined surface of the friction block fits with the bottom of the groove of the embedded groove, and the reset force of the safety clamp is reduced by the cooperation of the inclined surface of the wedge block.

[0040] The front side opening of the second recess II of the caliper body 1 of the present embodiment corresponds to the installation limit cover plate 5 of the friction block 4. The limit cover plate 5 has a guide limit groove 50. The friction block 4 has a guide pin 40 that cooperates with the guide limit groove 50 to guide the friction block 4 in the vertical movement and limit the lateral movement.

[0041] The design of the displacement reset mechanism of this embodiment can not only reduce the reset force of the safety clamp, but also reset the displacement of the friction block along the guide rail channel direction after the safety clamp is reset. Specifically, the displacement reset mechanism includes a guide column 8 and a compression spring 9. The upper end of the guide column 8 has a coaxial boss 80. The diameter of the boss is larger than the diameter of the guide column 8, which not only increases the contact area with the friction block 4, but also facilitates the installation of the compression spring 9; the friction block 4 abuts on the top of the boss 80, and the lower end of the guide column 8 penetrates the bottom wall of the second concave portion of the caliper body and the horizontal bending portion of the limit cover plate 5; the compression spring 9 is sleeved outside the guide column 8, and the upper and lower ends of the compression spring 9 respectively abut against the boss 80 and the bending portion of the limit cover plate 5 or the bottom wall of the second concave portion of the caliper body. Among them, the guide column 8 is linked to the friction block 4 to move along the extension direction of the guide rail channel, that is, the guide column 8 is movably matched with the caliper body 1.

[0042] The electromagnet 6 of this embodiment is installed below the roller cover plate 3 through the mounting bracket 60 fixed to the caliper body 1, and is used to drive the roller cover plate 3 to move horizontally to approach the guide rail channel 10 when the power is off, and the roller cover plate 3 synchronously links the brake roller 2 to move horizontally to contact the elevator guide rail, and the elevator guide rail drives the brake roller 2 to move along the roller movable avoidance strip hole 31 to the top of the movable avoidance section 31b, and finally realizes the braking cooperation between the brake roller 2 and the elevator guide rail. Specifically, the roller cover plate 3 is bent and extended to have a driving seat 33, and the driving end of the electromagnet 6 is drivingly connected to the driving seat 33 of the roller cover plate, and is used to vertically drive the roller cover plate 3; wherein the driving seat 33 has a transverse travel hole 330, which is used to avoid the relative transverse movement of the roller cover plate 3 and the driving end of the electromagnet 6.

[0043] In addition, an electrical switch 11 is installed on the top of the roller cover plate 3 of this embodiment. When the roller cover plate 3 synchronously links the brake roller 2 to move laterally before contacting the elevator guide rail, the electrical switch 11 is disengaged from the top of the clamp body 1 to disconnect the electrical switch 11.

[0044] The braking principle of the electronic safety clamp of this embodiment is as follows:

[0045] When the electromagnet loses power, the driving end of the electromagnet pops out, driving the roller cover plate vertically upward and moving vertically and synchronously horizontally to approach the guide rail channel. The roller cover plate synchronously links the brake roller to move horizontally until it contacts the elevator guide rail, and the electrical switch is disconnected synchronously, eventually making the brake roller and the friction block contact the elevator guide rail for braking. During the resetting process, only a small resetting force is needed to move the friction block of the wedge structure downward, so that the positive pressure of the friction block on the elevator guide rail is reduced, and the moved friction block returns to its original position under the resetting action of the displacement resetting mechanism.

[0046] Embodiment 2:

[0047] The difference between the power-off triggered safety clamp of this embodiment and that of embodiment 1 is that:

[0048] The electromagnet can also be installed on the side of the roller cover to directly drive the roller cover to move horizontally to meet the needs of different applications;

[0049] For other structures, please refer to Example 1.

[0050] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, according to the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. An electronic safety clamp, comprising a clamp body, a brake roller and a friction block, wherein the clamp body has a vertically extending guide rail channel and a roller track and an embedding groove distributed on both sides thereof; the brake roller is mounted on the clamp body through a roller cover plate and movably fits in the roller track; the friction block is mounted on the embedding groove of the clamp body through a limit cover plate; the electronic safety clamp also includes an electronic trigger installed on the clamp body, characterized in that, The roller cover plate has a roller movable avoidance strip hole and a cover plate transverse movable travel hole, and the convex shaft of the brake roller is inserted into the roller movable avoidance strip hole; the roller cover plate is fixed to the caliper body through a fixing piece passing through the cover plate transverse movable travel hole, so that the roller cover plate is movably fitted to the caliper body; In the power-off state, the electronic trigger drives the roller cover to move laterally to approach the guide rail channel, and the roller cover synchronously links the brake roller to move laterally until it contacts the elevator guide rail.

2. An electronic safety clamp according to claim 1, characterized in that: The roller movable avoidance strip hole comprises a vertical section and a movable avoidance section, wherein the vertical section is used to prevent the brake roller from malfunctioning, and the movable avoidance section is used to avoid the travel of friction braking between the brake roller and the elevator guide rail.

3. An electronic safety clamp according to claim 1, characterized in that: The raceway is an inclined surface structure.

4. The electronic safety clamp according to claim 1, characterized in that: The friction block is a wedge block structure, the groove bottom of the embedding groove of the caliper body is an inclined surface structure, and the inclined surface of the friction block fits with the groove bottom of the embedding groove.

5. The electronic safety clamp according to claim 1, characterized in that: The cover plate has at least two transverse movable travel holes, which are staggered.

6. The electronic safety clamp according to claim 1, characterized in that: The transverse movable travel hole of the cover plate is a waist-shaped hole.

7. The electronic safety clamp according to claim 1, characterized in that: The roller cover is bent and extended to form a driving seat, and the driving end of the electronic trigger is drivingly connected to the driving seat of the roller cover for vertically driving the roller cover; The driving seat has a transverse travel hole for avoiding relative transverse movement between the roller cover plate and the driving end of the electronic triggering member.

8. The electronic safety clamp according to claim 1, characterized in that: The roller cover plate is provided with an electrical switch. When the roller cover plate synchronously links the brake roller to move laterally before contacting the elevator guide rail, the electrical switch is separated from the clamp body to disconnect the electrical switch.

9. The electronic safety clamp according to claim 1, characterized in that: The two ends of the friction block along the guide rail channel direction are respectively in contact with the caliper body and the displacement reset mechanism, and the displacement reset mechanism is used to provide a displacement stroke for the friction block when the safety caliper is reset and to reset the friction block after displacement; The displacement reset mechanism includes a guide column and a compression spring. One end of the guide column has a boss, which abuts against the friction block, and the other end passes through the caliper body. The compression spring is sleeved outside the guide column, and its two ends abut against the boss and the caliper body respectively. The guide post is linked with the friction block to move along the extension direction of the guide rail channel; The limit cover plate has a movable avoidance groove corresponding to the friction block, and the friction block has a guide boss, which is plug-fitted with the movable avoidance groove to avoid lateral and vertical movement of the friction block.

10. The electronic safety clamp according to any one of claims 1 to 9, characterized in that: The electronic triggering component is an electromagnet.

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