CN215485401U - Limiting mechanism of normally-opened door closer - Google Patents

Abstract

The utility model relates to a limiting mechanism of a normally-open door closer, which comprises a bracket, wherein a push-pull electromagnet is arranged on the bracket, and a movable sliding rod of the push-pull electromagnet is movably abutted with a push-pull mechanism which is pivoted on the bracket and can reset; the push-pull electromagnet is provided with a permanent magnet which is magnetically attracted with the movable sliding rod when the door is opened; the push-pull mechanism is in transmission connection with a limiting device, the limiting device comprises a moving shaft which is pivoted with the push-pull mechanism and is arranged on the bracket in a sliding manner, the moving shaft is connected with a limiting shaft which is arranged on the bracket in a sliding manner, the sliding direction of the limiting shaft is not parallel to the sliding direction of the moving shaft, and a telescopic spring is arranged between the limiting shaft and the moving shaft; the support is provided with a movable shaft sliding groove and a limiting shaft sliding groove, and the limiting shaft is movably connected with a sliding block used for controlling the opening and closing of the door in an abutting mode. The utility model discloses a magnetism through permanent magnet and movable slide bar is inhaled and is kept the state of opening the door, has reduced the energy consumption, simple to operate does not need the manual operation that resets.

Description

Limiting mechanism of normally-opened door closer

Technical Field

The utility model relates to a security device, in particular to a limiting mechanism of a normally open door closer.

Background

The normally-open door closer is an important component in a fire alarm system, and generally comprises three parts, namely a linkage sliding chute, a connecting rod and a hydraulic device. The connecting rod is connected with the linkage sliding groove through a sliding block, and the linkage sliding groove controls the sliding block to move through the limiting mechanism to achieve the door opening and closing actions of the normally-opened door. In a daily state, the limiting mechanism takes effect, the position of the sliding block is fixed, the hydraulic device cannot be released, and the normally open door is kept in a normally open state; when receiving fire alarm signal, stop gear became invalid, the slider can freely remove, and hydraulic means releases, and normally open door is closed in order to play the effect of separating the cigarette back-fire relief.

At present, normally open door closer stop gear has two kinds of implementation methods: one is to adopt an attraction type electromagnet, a limiting device is connected with the electromagnet through a lever, the electromagnet is attracted with one side of the lever when working, the limiting device takes effect, and a normally open door is kept in a normally open state. When a fire alarm signal is received, the electromagnet is separated from the lever, the limiting device fails, and the normally-open door is closed. However, in the implementation mode, the electromagnet is required to be always kept in a working state, the power consumption is high, the load of the whole system is large, the lever stroke is long, the integral height of the linkage sliding groove is high, and the linkage sliding groove is not suitable for normally-opened door installation of a narrow door frame. The other type is a push-pull electromagnet, a limiting device is connected with the electromagnet through a lever, the limiting device is effective by utilizing the spring elasticity of the electromagnet, and the normally-open door is kept in a normally-open state. When a fire alarm signal is received, the electromagnet works to be separated from the lever, the limiting device fails, and the normally-open door is closed. However, the limiting device needs to be manually operated to take effect, the installation is inconvenient, and the limiting mechanism is long in length and high in height and is not suitable for installation of a normally open door with a narrow door frame.

SUMMERY OF THE UTILITY MODEL

Aiming at the existing defects, the utility model provides a limiting mechanism of a normally-open door closer.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a limit mechanism of a normally-open door closer comprises a bracket, wherein a push-pull electromagnet is arranged on the bracket, and a movable sliding rod of the push-pull electromagnet is movably abutted with a push-pull mechanism which is pivoted on the bracket and can reset under the action of elasticity; the push-pull electromagnet is provided with a permanent magnet, and a movable sliding rod of the push-pull electromagnet is magnetically attracted with the permanent magnet when the door is opened; the limiting device comprises a moving shaft which is pivoted with the push-pull mechanism and is arranged on the support in a sliding manner, the moving shaft is connected with a limiting shaft which is arranged on the support in a sliding manner, the sliding direction of the limiting shaft is not parallel to the sliding direction of the moving shaft, the moving shaft is sleeved on the outer wall of a connecting piece, one end of the connecting piece, far away from the moving shaft, is connected with the limiting shaft, an expansion spring which is sleeved on the connecting piece is arranged between the limiting shaft and the moving shaft, one end of the expansion spring is fixedly connected with the limiting shaft, and the other end of the expansion spring is fixedly connected with the moving shaft; the support is provided with a moving shaft sliding groove and a limiting shaft sliding groove which correspond to the moving shaft and the limiting shaft and are inserted into the moving shaft sliding groove and the limiting shaft sliding groove, and the limiting shaft is movably connected with a sliding block used for controlling the opening and closing of the door in an abutting mode.

Preferably, the push-pull mechanism comprises a push-pull piece which is pivoted on the bracket and movably abutted against the movable sliding rod of the push-pull electromagnet, a reset torsion spring arranged on the push-pull piece, and a connecting rod pivoted with the push-pull piece, and the connecting rod is pivoted with the moving shaft.

Preferably, the push-pull member is pivoted on the support through a rotating shaft, and the reset torsion spring is sleeved on the rotating shaft and connected with the push-pull member.

Preferably, the moving shaft sliding groove is a sliding groove which is in an S-shaped, linear or arc-shaped structure in the horizontal direction, and the limiting shaft sliding groove is a sliding groove which is linear in the vertical direction.

Preferably, the moving shaft sliding groove and the limiting shaft sliding groove are through holes formed in the support.

Preferably, the moving shaft is provided with a moving shaft through hole through which the connecting member slides.

Preferably, the push-pull mechanism comprises an L-shaped push-pull member pivoted and slidably arranged on the support and movably abutted against the movable sliding rod of the push-pull electromagnet, a reset block connected with the push-pull member and slidably arranged on the support, and a reset spring with two ends correspondingly connected with the support and the reset block, wherein the support is provided with a push-pull member sliding groove for sliding the push-pull member, and the push-pull member is pivoted with the moving shaft.

Preferably, the sliding block is provided with a bulge which can movably abut against and limit the limit shaft, and two end faces of the bulge in the sliding direction of the sliding block form inclined planes.

Preferably, the push-pull mechanism is provided with a groove which is abutted against a movable sliding rod of the push-pull electromagnet.

Preferably, the push-pull mechanism and the pivot point of the bracket and the sliding groove of the moving shaft are at the same height.

The utility model has the beneficial effects that: when the normally open door is opened, the electromagnet generates an acting force which is attracted with the permanent magnet, so that the permanent magnet and the movable sliding rod are attracted by magnetic attraction, the limiting device takes effect, and the sliding block is fixed; when a fire alarm signal is received, the electromagnet generates an acting force opposite to the attraction force of the permanent magnet, so that the permanent magnet is separated from the movable sliding rod, the limiting device is invalid, the sliding block can move freely, the normally-opened door is closed, and manual reset operation is not needed; meanwhile, the movement of the limiting device is controlled by the push-pull mechanism, the height of the whole structure is effectively reduced, the installation is convenient, the production cost is also reduced, and the door closer is more suitable for installation of a normally-opened door of a narrow door frame.

Drawings

FIG. 1 is an exploded view of an embodiment of the present invention;

FIG. 2 is a schematic view of a stop device in an active state according to an embodiment of the present invention;

FIG. 3 is a schematic view of a stop device in accordance with an embodiment of the present invention in a failed state;

FIG. 4 is a schematic view of an alternative push-pull mechanism employed in embodiments of the present invention;

FIG. 5 is a schematic view of the inside of a push-pull electromagnet according to an embodiment of the present invention;

part names and serial numbers in the figure: 1-bracket 10-moving shaft chute 11-limiting shaft chute 12-push-pull piece chute 2-push-pull electromagnet 20-moving slide bar 21-permanent magnet 22 coil 23-attraction face 3-push-pull mechanism 30-push-pull piece 31-reset torsion spring 32-connecting rod 33-rotating shaft 34-reset block 35-reset spring 300-groove 4-limiting device 40-moving shaft 41-limiting shaft 42-telescopic spring 43-connecting piece 5-slider 50-bulge.

Detailed Description

To more clearly illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention. In addition, directional terms used in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., refer to directions only as shown in the attached drawings, and are used for better and clearer explanation and understanding of the present invention, and do not indicate or imply orientation which the present invention must have, and thus, should not be construed as limiting the present invention.

The embodiment of the utility model is shown in figures 1 to 5, a limiting mechanism of a normally open door closer comprises a bracket 1, a push-pull electromagnet 2 is arranged on the bracket 1, the push-pull electromagnet 2 comprises a coil 22, a movable iron core, a static iron core power supply controller and the like a conventional push-pull electromagnet, the movable iron core itself or a draw bar connected on the movable iron core forms a movable slide bar 20 thereof, namely a translation shaft, and performs linear reciprocating motion under the action of magnetic force, the movable slide bar 20 of the push-pull electromagnet 2 is movably abutted with a push-pull mechanism 3 which is pivoted on the bracket 1 and can reset under the action of elastic force, namely, the movable slide bar 20 extends out of the push-pull electromagnet 2 under the action of magnetic force and is abutted with the push-pull mechanism 3, and can retract and disconnect the abutment with the push-pull mechanism 3 under the action of magnetic force, after the abutment is disconnected, the push-pull mechanism 3 can return to the initial state under the action of elastic force, the push-pull mechanism 3 can synchronously move with the movable sliding rod 20 of the push-pull electromagnet 2 under the action of the movable sliding rod 20, the push-pull mechanism 3 is provided with a groove 300 which is abutted against the movable sliding rod 20 of the push-pull electromagnet 2, and when the movable sliding rod 20 abuts against the push-pull mechanism 3 to apply thrust to the push-pull mechanism 3 by utilizing the groove wall of the groove 300, the side slipping phenomenon cannot occur, the application direction of the thrust is ensured, and the limiting mechanism can be ensured to accurately exert the function; the push-pull type electromagnet 2 is provided with a permanent magnet 21, the movable sliding rod 20 of the push-pull type electromagnet 2 is magnetically attracted with the permanent magnet 21 when the door is opened, and an attraction surface 23 is formed at the magnetic attraction position, in such a structure, when the normally opened door is opened, the electromagnet is used for generating an acting force which is attracted with the permanent magnet 21, so that the permanent magnet 21 and the movable sliding rod 20 are magnetically attracted and attracted, the electromagnet does not work after the door is opened, the door is opened only by the magnetic attraction of the permanent magnet 21 and the movable sliding rod 20, the energy consumption is reduced, and when a fire alarm signal is received, the electromagnet generates an acting force which is opposite to the permanent magnet attraction force 21, so that the permanent magnet 21 is separated from the movable sliding rod 20; the push-pull mechanism 3 is connected with a limiting device 4 in a transmission way, so that the push-pull mechanism 3 is transmitted to the limiting device 4 when moving along with a movable sliding rod 20 of the push-pull electromagnet 2, so that the limiting device 4 is in an effective or invalid state in the door closer, namely when a normally opened door is opened, the limiting device 4 is in the effective state, otherwise, the limiting device is in the invalid state, the limiting device 4 comprises a moving shaft 40 which is pivoted with the push-pull mechanism 3 and is arranged on the bracket 1 in a sliding way, namely the moving shaft 40 is pivoted with the push-pull mechanism 3 and can rotate relative to the push-pull mechanism 3, and simultaneously slides on the bracket 1, a moving shaft sliding groove 10 for the sliding is arranged on the corresponding bracket 1, so that the moving shaft 40 slides relative to the bracket 1 under the driving of the push-pull mechanism 3, the moving shaft sliding groove 10 limits the sliding direction of the moving shaft, the moving shaft 40 is connected with a limiting shaft 41 which is arranged on the bracket 1 in a sliding way and the sliding direction of the moving shaft 40 is not parallel to the sliding direction of the moving shaft 40, that means the limiting shaft 41 moves synchronously with the moving shaft 40, the bracket 1 is also correspondingly provided with a limiting shaft sliding slot 11 for the limiting shaft 41 to slide, but the sliding direction of the moving shaft 40 is not parallel to the sliding direction of the limiting shaft 41, it is indicated that an included angle exists between the moving directions of the limiting shaft 41 and the moving shaft, the included angle is not 0 degree or 180 degrees, the moving shaft 40 is sleeved on the outer wall of a connecting piece 43, one end of the connecting piece 43 far away from the moving shaft 40 is connected with the limiting shaft 41, an expansion spring 42 sleeved on the connecting piece 43 is arranged between the limiting shaft 41 and the moving shaft 40, one end of the expansion spring 42 is fixedly connected with the limiting shaft 41, the other end is fixedly connected with the moving shaft 40, the connecting piece 43 is used for connecting the moving shaft 40 and the limiting shaft 41, the structure of the moving shaft 40 and the limiting shaft 41 can be simplified, and the arrangement of the expansion spring 42 is also facilitated, at this time, a moving shaft through hole through which the connecting piece 43 passes is formed in the moving shaft 40, the connecting piece 43 can slide in the moving shaft through hole relative to the moving shaft 40, the expansion spring 42 selects a large force spring, when the fireproof door needs to be forcibly closed, the sliding block 5 applies a working tension to the limiting shaft 41, the working tension is larger than that of the expansion spring 42 in the vertical direction, the limiting shaft 41 and the connecting piece 43 can move downwards along the moving shaft through hole in the middle of the moving shaft 40 to enable the limiting device to be invalid, and the fireproof door is closed; the limiting shaft 41 is movably abutted with a sliding block 5 for controlling the opening and closing of the door, and the sliding block 5 is controlled to be fixed or moved by the abutting or breaking of the limiting shaft 42 and the sliding block 5, namely when the limiting device 4 takes effect, the sliding block 5 is fixed, so that the normal opening of the sliding block 5 is kept; when the limiting device 4 fails, the sliding block 5 can move freely, the normally open door is closed, and the resetting operation is not needed manually in the whole process; the push-pull mechanism 3 controls the movement of the limiting device 4, the limiting shaft 42 of the limiting device 4 controls the movement of the sliding block 5, the overall structure height is effectively reduced, the installation is more convenient, the production cost is also reduced, and the door closer is more suitable for installation of a normally-opened door of a narrow door frame.

As a further improvement, as shown in fig. 1 to 3, for the push-pull mechanism 3, one structure is that the push-pull mechanism 3 includes a push-pull member 30 pivoted on the bracket 1 and movably abutted against the movable sliding rod 20 of the push-pull electromagnet 2, a reset torsion spring 31 disposed on the push-pull member 30, and a connecting rod 32 pivoted with the push-pull member 30, the connecting rod 32 is pivoted with the moving shaft 40, that is, the push-pull member 30 movably abutted against the movable sliding rod 20 of the push-pull electromagnet 2, the push-pull member 30 can be a member similar to a right triangle shape, and pivoted at a right angle with the bracket 1, the connecting rod 32 is pivoted at any other angle, the position corresponding to the other angle is in a plane corresponding to the right angle side of the other angle abutted against the movable sliding rod 20 of the push-pull electromagnet 2, the pivoting with the bracket 1 is realized by a rotating shaft 33, the reset torsion spring 31 is sleeved on the rotating shaft 33 and connected with the push-pull member 30, the simple structure both conveniently connects and can not influence respective operation again, the movable sliding rod 20 butt of plug-type electro-magnet 2 just promotes push-pull piece 30 and rotates relative to support 1 on push-pull piece 30, push-pull piece 30 just drives connecting rod 32 motion in the relative support 1 rotation, the connecting rod drives removal axle 40 motion again, removal axle 40 drives spacing axle 41 motion again, and then control slider 5 is at fixed or slip state, the reset torsional spring 31 that sets up on push-pull piece 30 this moment just makes push-pull piece 30 when the movable sliding rod 20 with plug-type electro-magnet 2 breaks off the butt, can reply the initial state, and then make slider 5 reply initial state. As shown in fig. 4, another structure is that the push-pull mechanism 3 includes an L-shaped push-pull member 30 pivoted and slidably disposed on the bracket 1 and movably abutted against the movable sliding rod 20 of the push-pull electromagnet 2, a reset block 34 connected with the push-pull member 30 and slidably disposed on the bracket, and a reset spring 35 having two ends corresponding to the bracket 1 and the reset block 34, the bracket 1 is provided with a push-pull member chute 12 for sliding the push-pull member 30, the push-pull member 30 is pivotally connected with the movable shaft 40, so that a transmission component is reduced between the push-pull member 30 and the movable shaft 40, the connection structure between the push-pull member 30 and the movable shaft 40 is simplified, force transmission can be better performed, and simultaneously, the reset block 34 disposed on the bracket 1 is selected for resetting the push-pull member 30, the push-pull member 30 moves to drive the reset block 34 to move, the reset spring 35 bears force, the force borne by the push-pull member 30 disappears, and the reset spring 35 generates an elastic force opposite to the original force borne by the reset block 34, the reset block 34 resets the push-pull element 30.

Further improvement, as shown in fig. 1 to 4, the moving shaft sliding groove 10 is a sliding groove with an S-shaped, linear or arc-shaped structure in the horizontal direction, and the limiting shaft sliding groove 11 is a sliding groove with a linear type in the vertical direction, so that the shape of the corresponding moving shaft sliding groove 10 can be set according to the rotation angle of the push-pull mechanism 3 relative to the bracket 1, so that the moving shaft 40 performs linear or arc motion in the horizontal direction, the limiting shaft 41 always slides up and down along with the sliding of the moving shaft 40, and then the abutting or separation with the sliding block 5 is realized, and the automatic control of the normally open door is realized.

In a further improvement, as shown in fig. 1 to 4, the moving shaft sliding groove 10 and the limiting shaft sliding groove 11 are through holes disposed on the bracket 1, and the moving shaft 40 and the limiting shaft 41 can be conveniently mounted by using the through holes, and problems generated during sliding can be timely repaired. At the moment, corresponding sliding grooves are formed in two opposite side walls of the support 1, and a cavity is formed in a part clamped between the two sliding grooves to install the push-pull mechanism 3 and the limiting device 4, so that the structure is more compact and complete.

Further improvement, as shown in fig. 1 to 4, a protrusion 50 capable of movably abutting against the limiting shaft 41 for limiting is arranged on the slider 5, two end faces of the protrusion 50 in the sliding direction of the slider 5 form inclined planes, the protrusion 50 is utilized to play a role in fixing the abutting of the slider 5 and the limiting shaft 41, so that the slider 5 is fixed conveniently, meanwhile, the inclined plane on the protrusion 50 is convenient for the sliding of the limiting shaft 41 thereon, and the limiting shaft 41 and the slider 5 can be abutted or disconnected smoothly.

In a further improvement, as shown in fig. 1 to 4, the pivot point of the push-pull mechanism 3 and the support 1 and the movable shaft sliding groove 10 are at the same height, so that the force applied to the movable sliding rod 20 of the push-pull electromagnet 2 can be better transmitted, and the limit device 4 can be ensured to respond and take effect in time.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the utility model as defined in the appended claims.

Claims (10)

1. The utility model provides a stop gear of door closer opens door which characterized in that: the push-pull type electromagnet is arranged on the bracket, and a movable sliding rod of the push-pull type electromagnet is movably abutted with a push-pull mechanism which is pivoted on the bracket and can reset under the action of elasticity; the push-pull electromagnet is provided with a permanent magnet, and a movable sliding rod of the push-pull electromagnet is magnetically attracted with the permanent magnet when the door is opened; the limiting device comprises a moving shaft which is pivoted with the push-pull mechanism and is arranged on the support in a sliding manner, the moving shaft is connected with a limiting shaft which is arranged on the support in a sliding manner, the sliding direction of the limiting shaft is not parallel to the sliding direction of the moving shaft, the moving shaft is sleeved on the outer wall of a connecting piece, one end of the connecting piece, far away from the moving shaft, is connected with the limiting shaft, an expansion spring which is sleeved on the connecting piece is arranged between the limiting shaft and the moving shaft, one end of the expansion spring is fixedly connected with the limiting shaft, and the other end of the expansion spring is fixedly connected with the moving shaft; the support is provided with a moving shaft sliding groove and a limiting shaft sliding groove which correspond to the moving shaft and the limiting shaft and are inserted into the moving shaft sliding groove and the limiting shaft sliding groove, and the limiting shaft is movably connected with a sliding block used for controlling the opening and closing of the door in an abutting mode.

2. The limit mechanism of the normally open door closer of claim 1, wherein the push-pull mechanism comprises a push-pull member pivoted on the bracket and movably abutted against the movable sliding rod of the push-pull electromagnet, a reset torsion spring arranged on the push-pull member, and a connecting rod pivoted with the push-pull member, and the connecting rod is pivoted with the moving shaft.

3. The limiting mechanism of the normally open door closer of claim 2, wherein the push-pull member is pivotally connected to the bracket through a rotating shaft, and the return spring is sleeved on the rotating shaft and connected to the push-pull member.

4. The limiting mechanism of claim 1, wherein the moving shaft sliding slot is a sliding slot with an S-shaped, linear or arc-shaped structure in the horizontal direction, and the limiting shaft sliding slot is a sliding slot with a linear structure in the vertical direction.

5. The limiting mechanism of the normally open door closer of claim 1, wherein the moving shaft sliding groove and the limiting shaft sliding groove are through holes arranged on the bracket.

6. The limit mechanism of the normally open door closer of claim 1, wherein the moving shaft is provided with a moving shaft through hole through which the connecting piece slides.

7. The limiting mechanism of the normally-open door closer according to claim 1, wherein the push-pull mechanism comprises an L-shaped push-pull member pivoted and slidably arranged on the bracket and movably abutted against the movable sliding rod of the push-pull electromagnet, a reset block connected with the push-pull member and slidably arranged on the bracket, and a reset spring with two ends correspondingly connected with the bracket and the reset block, wherein the bracket is provided with a push-pull member sliding chute for sliding the push-pull member, and the push-pull member is pivoted with the moving shaft.

8. The limit mechanism of the normally open door closer of claim 1, wherein the sliding block is provided with a protrusion which can movably abut against the limit shaft for limiting, and two end surfaces of the protrusion in the sliding direction of the sliding block form inclined surfaces.

9. The limit mechanism of the normally open door closer of claim 1, wherein the push-pull mechanism is provided with a groove which is abutted with the movable sliding rod of the push-pull electromagnet.

10. The limit mechanism of the normally open door closer of claim 1, wherein the pivot point of the push-pull mechanism and the bracket and the sliding groove of the moving shaft are at the same height.

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