Detachable limiting mechanism and door closer

Abstract

The detachable limiting mechanism is applied to the door closer, the door closer comprises a sliding block used for limiting a door, and the limiting mechanism is used for limiting the sliding block at the first position and releasing limiting of the sliding block at the second position. The limiting mechanism comprises a spring bolt and a locking connecting rod which is in linkage with the spring bolt to rotate to the first position or the second position, the spring bolt and the locking connecting rod are detachably and fixedly connected, and the worn spring bolt can be replaced in time in a detachable connecting mode so that the sliding block can be accurately limited to the preset position, and therefore the door can be completely opened or closed. Potential safety hazards are reduced, the spring bolt can be replaced independently, and the cost is reduced. The utility model further provides a door closer with the limiting mechanism, the limiting mechanism is high in stability, and the sliding block can be limited to be preset.

Description

Technical Field

[0001] This utility model belongs to the field of door closer technology, and in particular relates to a detachable limiting mechanism used in door closers. Background Technology

[0002] A door closer is a device used to keep a door open for extended periods but close it promptly in the event of a fire. It mainly includes an integrally formed limiting mechanism, which includes a latch and a locking link that rotates in conjunction with the latch. When the locking link rotates the latch to the first position, it blocks and limits the slider, thereby limiting the slider to the door. When the locking link rotates the latch to the second position, the latch no longer blocks and limits the slider, thus allowing the door to close promptly.

[0003] However, the lock tongue rotates repeatedly between the first and second positions, which makes it prone to wear. After the lock tongue is worn out, it cannot limit the slider to the preset position, thus preventing the door from being fully opened or closed, which poses a great safety hazard. At the same time, the cost of replacing the one-piece molded limiting mechanism is high after it is damaged.

[0004] For the reasons mentioned above, there is an urgent need for a detachable limiting mechanism to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a detachable limiting mechanism for door closers. The detachable connection method allows for timely replacement of worn lock tongues to precisely limit the slider to a preset position, thereby fully opening or closing the door, reducing safety hazards. Furthermore, the lock tongue can be replaced separately, reducing costs.

[0006] This utility model is implemented as follows: a detachable limiting mechanism is applied in a door closer. The door closer includes a slider for limiting the door. The limiting mechanism is used to limit the slider in a first position and to release the slider in a second position. The limiting mechanism includes a latch and a locking link that links the latch to rotate to the first or second position. The latch and the locking link are detachably fixedly connected.

[0007] Furthermore, the locking link has a bayonet, and the lower end of the locking tongue is embedded in the bayonet.

[0008] Preferably, the lower ends of the latch and the locking tongue are both square structures.

[0009] Furthermore, the latch has a stop surface for blocking and limiting the side of the slider and a support surface connected to the lower end of the stop surface.

[0010] Furthermore, the blocking surface is vertically arranged, and the supporting surface is inclined relative to the blocking surface. The supporting surface is configured to limit the contact area between the blocking surface and the slider within a set threshold.

[0011] Furthermore, the upper end of the locking tongue is provided with an anti-collision slope, one end of which extends to the upper end of the abutment surface. The anti-collision slope is configured to prevent the anti-collision slope from colliding with the slider during rotation when the limiting mechanism releases its limiting effect on the slider in the second position.

[0012] Furthermore, the supporting surface and the anti-collision inclined surface are located on both sides of the blocking surface.

[0013] Furthermore, the limiting mechanism includes a locking member, which includes a nut and a screw threaded to the nut, the nut being configured to increase the threaded area between the nut and the screw.

[0014] Furthermore, the locking tongue has a first countersunk hole through which the nut can pass, the first countersunk hole being in clearance sliding fit with the nut, and the locking link having a second countersunk hole corresponding to the first countersunk hole and through which the screw can pass, the second countersunk hole communicating with the bayonet and located in the middle of the bayonet.

[0015] This utility model provides a detachable limiting mechanism for use in door closers. The door closer includes a slider for limiting the door position. The limiting mechanism limits the slider in a first position and releases the slider in a second position. The limiting mechanism includes a latch and a locking link that rotates the latch to the first or second position. The latch and the locking link are detachably fixedly connected. This detachable connection method allows for timely replacement of worn latches to precisely limit the slider in a preset position, thereby fully opening or closing the door, reducing safety hazards. Furthermore, the latch can be replaced separately, reducing costs.

[0016] This utility model also provides a door closer, including the limiting mechanism described above, and further including a slider, a fork, and a control mechanism for controlling the forward and backward translation of the fork. The control mechanism controls the fork to translate to a third position to limit the latch, so that the limiting mechanism limits the slider in a first position. The control mechanism controls the fork to move to a fourth position to release the latch, so that the limiting mechanism releases the slider in a second position. This limiting mechanism has strong stability and can limit the slider to a preset position. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional schematic diagram of the cooperation between the limiting mechanism and the slider in the door closer provided in this embodiment of the utility model.

[0019] Figure 2 This is an exploded view of the limiting mechanism in the door closer provided in this embodiment of the utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the door closer provided in an embodiment of this utility model.

[0021] The following provides a detailed explanation of the figure numbers:

[0022] Door closer 10,

[0023] Limiting mechanism 100, locking tongue 110, blocking surface 111, supporting surface 112, anti-collision inclined surface 113, first countersunk hole 114, locking link 120, bayonet 121, supporting rod 122, second countersunk hole 123, locking part 130, nut 131, screw 132.

[0024] Slider 200;

[0025] 300 forks;

[0026] Control mechanism 400. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] like Figure 1 and Figure 2As shown in the figure, a detachable limiting mechanism 100 provided in this embodiment of the present invention is applied to a door closer 10. The door closer 10 includes a slider 200 for limiting a door (not shown). The limiting mechanism 100 is used to limit the slider 200 in a first position and to release the limiting of the slider 200 in a second position. The limiting mechanism 100 includes a latch 110 and a locking link 120 that is linked to the latch 110 to rotate to the first position or the second position. The latch 110 and the locking link 120 are detachably fixedly connected. By adopting a detachable connection method, the worn latch 110 can be replaced in time to accurately limit the slider 200 in a preset position, thereby fully opening or closing the door, reducing safety hazards. Furthermore, the latch 110 can be replaced separately, reducing costs.

[0029] Furthermore, the locking link 120 has a bayonet 121, and the lower end of the locking tongue 110 is embedded in the bayonet 121. In this embodiment, both the bayonet 121 and the lower end of the locking tongue 110 are preferably square structures, which avoids the phenomenon of the locking tongue 110 rotating in the bayonet and is beneficial to the stability of the locking tongue 110.

[0030] Furthermore, the latch 110 has a stop surface 111 for blocking and limiting the side of the slider 200 and a support surface 112 connected to the lower end of the stop surface 111.

[0031] Furthermore, the abutment surface 111 is vertically arranged, and the support surface 112 is inclined relative to the abutment surface 111. The support surface 112 is configured to limit the contact area between the abutment surface 111 and the slider 200 within a set threshold (i.e., the upward orientation of the support surface 112 reduces the contact area between the abutment surface 111 and the slider 200, while the downward orientation of the support surface 112 increases the contact area between the abutment surface 111 and the slider 200). The inclined support surface 112 is also configured to prevent the support surface 112 from colliding with the slider 200 during rotation when the limiting mechanism 100 releases the limiting of the slider 200 in the second position.

[0032] In this example, the locking link 120 has a support rod 122 that supports the locking link 120. The locking link 120 and the support rod 122 are rotatably coupled. The support rod 122 is configured so that the locking link 120 has the function of a force-saving lever. That is, by releasing the limit at one end of the locking link 120, the latch 110 can quickly release its blocking limit on the slider 200. Preferably, the distance L between the support rod 122 and the end of the locking link 120 away from the latch 110 is four times the vertical distance M between the support rod 122 and the blocking surface 111.

[0033] Furthermore, the upper end of the locking tongue 110 is provided with an anti-collision slope 113, one end of which extends to the upper end of the abutment surface 111. The anti-collision slope 113 is configured to prevent the anti-collision slope 113 from colliding with the slider 200 during rotation when the limiting mechanism 100 releases its limit on the slider 200 in the second position.

[0034] Furthermore, the support surface 112 and the anti-collision slope 113 are located on both sides of the abutment surface 111.

[0035] Furthermore, the limiting mechanism 100 includes a locking member 130, which includes a nut 131 and a screw 132 screwed to the nut 131. The nut 131 is configured to increase the screwing area between it and the screw 132, thereby improving the stability of the connection between the nut 131 and the screw 132.

[0036] Furthermore, the locking tongue 110 has a first countersunk hole 114 through which the nut 131 passes. The first countersunk hole 114 and the nut 131 are in a sliding fit with clearance. The locking link 120 has a second countersunk hole 123 corresponding to the first countersunk hole 114 and through which the screw 132 passes. The second countersunk hole 123 communicates with the bayonet 121 and is located in the middle of the bayonet 121. In this embodiment, the nut 131 is preferably a bicycle hub spoke nut, and the screw 132 is preferably a flange anti-slip hexagonal screw. The bicycle hub spoke nut and the flange anti-slip hexagonal screw have long axial lengths and strong connection stability.

[0037] like Figure 3 As shown, this utility model also provides a door closer 10, including the above-mentioned limiting mechanism 100, and also includes a slider 200, a fork 300, and a control mechanism 400 for controlling the forward and backward translation of the fork 300. The control mechanism 400 controls the fork 300 to translate to a third position, where the fork 300 is used to limit the latch 110, so that the limiting mechanism 100 limits the slider 200 in the first position; the control mechanism 400 can also control the fork 300 to move to a fourth position, where the fork 300 is used to release the latch 110, so that the limiting mechanism 100 releases the slider 200 in the second position.

[0038] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A detachable limiting mechanism applied in a door closer (10), the door closer (10) including a slider (200) for limiting the door, the limiting mechanism (100) limiting the slider (200) in a first position and releasing the limiting of the slider (200) in a second position, characterized in that, The limiting mechanism (100) comprises a locking tongue (110) and a locking link (120) connected with the locking tongue (110) and capable of rotating the locking tongue (110) to a first position or a second position.

2. The detachable check mechanism of claim 1, wherein, The locking link (120) has a bayonet (121), and the lower end of the locking tongue (110) is embedded in the bayonet (121).

3. The detachable check mechanism of claim 2, wherein, The bayonet (121) and the lower end of the locking tongue (110) are both square structures.

4. The detachable check mechanism of claim 1, wherein, The locking tongue (110) has an abutting surface (111) for abutting and limiting the side surface of the sliding block (200) and a supporting surface (112) connected with the lower end of the abutting surface (111).

5. The detachable check mechanism of claim 4, wherein, The abutting surface (111) is vertically arranged, and the supporting surface (112) is arranged obliquely relative to the abutting surface (111) and is configured to limit the abutting area between the abutting surface (111) and the sliding block (200) within a set threshold.

6. The detachable check mechanism of claim 4, wherein, The upper end of the locking tongue (110) is provided with an anti-collision inclined surface (113), one end of the anti-collision inclined surface (113) extends to the upper end of the abutting surface (111), and the anti-collision inclined surface (113) is configured to prevent the anti-collision inclined surface (113) from colliding with the sliding block (200) during rotation when the limiting mechanism releases the limitation on the sliding block (200) in the second position.

7. The detachable check mechanism of claim 6, wherein, The supporting surface (112) and the anti-collision inclined surface (113) are respectively located on both sides of the abutting surface (111).

8. The detachable check mechanism of claim 2, wherein, The limiting mechanism comprises a locking member (130) comprising a nut (131) and a screw (132) screwed with the nut (131), and the nut (131) is configured to increase the screwing area with the screw (132).

9. The detachable check mechanism of claim 8, wherein, The locking tongue (110) has a first countersunk hole (114) through which the nut (131) passes, the first countersunk hole (114) is in clearance sliding fit with the nut (131), the locking link (120) has a second countersunk hole (123) corresponding to the first countersunk hole (114) and through which the screw (132) passes, and the second countersunk hole (123) is in communication with the bayonet (121) and is located at the middle position of the bayonet (121).

10. A door closer (10) characterised in that, The limiting mechanism (100) comprises a sliding block (200), a puller (300), and a control mechanism (400) for controlling the forward and backward translation of the puller (300), the control mechanism (400) controls the puller (300) to translate to a third position for limiting the locking tongue (110), so that the limiting mechanism limits the sliding block (200) in the first position, and the control mechanism (400) controls the puller (300) to move to a fourth position for releasing the limitation on the locking tongue (110), so that the limiting mechanism releases the limitation on the sliding block (200) in the second position.

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