Flat adjustable automatic door closing buffer

Abstract

The utility model discloses a flat type adjustable automatic door closing buffer which comprises a shell, a rotating shaft and a damping module, one end of the rotating shaft is inserted into the shell to be rotatably connected, the other end of the rotating shaft extends out of the shell to be fixedly connected with an external door leaf, a cam is arranged in the shell, and the center of the cam is fixedly sleeved outside the rotating shaft. The damping module comprises a damping sleeve, a push rod damper, an adjusting bolt and a baffle, the damping sleeve is rotationally arranged on one side in the shell, a pull rod is arranged between the cam and the damping sleeve and hinged to a protruding point of the cam, the surface of the pull rod is sleeved with a spring, the spring abuts against one end of the pull rod, and the other end of the spring abuts against the damping sleeve. One end of the adjusting bolt is connected with the other end of the pull rod, the baffle is arranged at the other end of the adjusting bolt, and an output rod of the push rod damper contacts with the baffle. According to the flat adjustable automatic door closing buffer, the size and the thickness are reduced, meanwhile, damping adjustment can be carried out, and therefore the installation and use requirements of people are met.

Description

Technical Field

[0001] This utility model relates to the field of damper technology, and in particular to a flat, adjustable automatic door closing buffer. Background Technology

[0002] Currently, automatic door closing dampers are commonly installed on the glass flip doors of freezers. These dampers achieve automatic door closing or provide damping during closing. Existing automatic door closing dampers mainly come in two types: slender and flat. Flat door closers are installed on the bottom or top surface of the door frame. Their flat size or thickness affects the gap between the door leaf and the door frame; a large gap affects aesthetics. Therefore, it is necessary to achieve a flat damper with a small thickness while also allowing for damping adjustment to meet installation and usage needs. Utility Model Content

[0003] The purpose of this invention is to provide a flat, adjustable automatic door closing damper that reduces size and thickness while still allowing for damping adjustment, thereby meeting people's installation and usage needs.

[0004] The technical solution adopted by the flat adjustable automatic door closing buffer disclosed in this utility model is as follows:

[0005] A flat, adjustable automatic door closer includes a housing, a rotating shaft, and a damping module. One end of the rotating shaft is inserted into the housing for rotatable connection, and the other end extends out of the housing for fixed connection to the outer door leaf. A cam is provided inside the housing, and the center of the cam is sleeved and fixed outside the rotating shaft. The damping module includes a damping sleeve, a push rod damper, an adjusting bolt, and a baffle. The damping sleeve is rotatably located inside the housing away from the cam. A pull rod is provided between the cam and the damping sleeve. One end of the pull rod is hinged to the cam's protrusion. One end of the pull rod is sleeved on its surface, with the spring end near the cam abutting against one end of the pull rod, and the other end of the spring abutting against the damping sleeve. One end of the adjusting bolt passes through the damping sleeve and connects to the other end of the pull rod. The baffle is located at the other end of the adjusting bolt, and the push rod damper is located in the damping sleeve. The output rod of the push rod damper contacts the baffle.

[0006] As a preferred embodiment, the housing includes a bottom cover and a top cover, which are detachably connected to form an installation carrier. The rotating shaft is set perpendicular to the bottom cover and is rotatably connected to the top cover and the bottom cover respectively through rolling bearings. The surface of the rotating shaft extending out of the bottom cover is provided with an installation flat position.

[0007] As a preferred embodiment, the rotating shaft is provided with an end face bearing on the side corresponding to the upper cover.

[0008] As a preferred embodiment, the upper cover of the housing is provided with a sliding plate on one side, the sliding plate is slidably connected to the surface of the upper cover, the surface of the sliding plate is provided with a clearance groove corresponding to the pivot, the sliding plate is provided with a boss vertically on the side of the housing near the side of the housing, the housing is provided with a sliding groove corresponding to the boss, the boss is disposed in the sliding groove, the sliding groove is provided with an adjusting screw, the adjusting screw is rotatably disposed in the housing, the adjusting screw is threadedly connected to the boss, the surface of the sliding plate is provided with a fixing hole, the housing is provided with a through hole corresponding to the fixing hole, and a positioning screw is provided in the fixing hole.

[0009] As a preferred embodiment, the upper cover surface is provided with a T-shaped post, the slide plate surface is provided with a corresponding guide groove, and the T-shaped post is slidably disposed in the guide groove.

[0010] As a preferred embodiment, the pull rod has a connector at one end near the cam. The connector is used to limit the movement of the spring. The connector is hinged to the cam by a pin, and a washer is provided between the connector and the cam.

[0011] As a preferred embodiment, the damping sleeve has a positioning hole in the middle, and the housing has a corresponding positioning post inside. The damping sleeve is rotatably connected to the positioning post through the positioning hole. One end of the damping sleeve has a placement cavity, and the other end of the spring is placed in the placement cavity. The adjusting bolt extends into the placement cavity and is threadedly connected to the pull rod.

[0012] As a preferred embodiment, the number of push rod dampers is two, and the push rod dampers are located on both sides of the adjusting bolt.

[0013] The beneficial effect of the flat adjustable automatic door closing buffer disclosed in this utility model is that the housing is fixed in the door leaf, and the rotating shaft extending out of the housing is fixedly connected to the door leaf, so that the door leaf and the door frame are connected.

[0014] When the door is in the open position, the rotating shaft drives the cam to rotate. When the angle between the cam and the pull rod is set to 0°, the spring is compressed to the maximum to form a dead angle, which makes the cam and the pull rod self-lock. At this time, under no force, the buffer is in the stopped state and stays in the open fixed position.

[0015] When an external force is applied to push the door leaf, the door leaf drives the rotating shaft to rotate. The cam on the rotating shaft drives the pull rod to swing, and the angle between the cam and the pull rod changes. The restoring force of the spring will push the pull rod to slide towards the cam side. The pull rod and the cam are linked together, causing the cam to rotate in the closing direction. At this time, the door begins to close automatically under the action of the spring.

[0016] Since the adjusting bolt is fixed to the pull rod, when the spring pushes the pull rod to slide, the adjusting bolt slides together, and the stop block also slides together. The stop block pushes the output rod into the push rod damper body, and the push rod damper is activated to generate damping force to prevent the stop block from pressing in. The reaction force is transmitted to the pull rod through the adjusting bolt, which ultimately cancels out part of the spring's thrust, forcing the door to close slower. Externally, this results in a buffering effect when the door closes.

[0017] When the relative position of the adjusting bolt and the pull rod is adjusted, the relative distance between the pull rod and the damping sleeve is changed, which forces the current compression preload of the spring installed between them to change, thereby changing the closing force and realizing the adjustable closing speed.

[0018] The above structure achieves the automatic door closing effect using a flattened design, reducing the size and thickness while still allowing for damping adjustment to meet people's installation and usage needs. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a flat, adjustable automatic door closing buffer according to this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of a flat, adjustable automatic door closing buffer according to this utility model.

[0021] Figure 3 This is an exploded view of a flat, adjustable automatic door closing buffer according to this utility model.

[0022] Figure 4 This is a schematic diagram of the opening and fixing state structure of a flat, adjustable automatic door closing buffer according to this utility model.

[0023] Figure 5 This is a schematic diagram of the closed rotation state structure of a flat, adjustable automatic door closing buffer according to this utility model.

[0024] Figure 6 This is a front structural diagram of a flat, adjustable automatic door closing buffer according to the present invention.

[0025] Figure 7 This is a partial structural diagram of a flat, adjustable automatic door closing buffer according to the present invention. Detailed Implementation

[0026] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0027] Please refer to Figures 1 to 3A flat, adjustable automatic door closing buffer includes a housing 10, a rotating shaft 11, and a damping module 20. One end of the rotating shaft 11 is inserted into the housing 10 for rotatable connection, and the other end of the rotating shaft 11 extends out of the housing 10 for fixed connection to the outer door leaf. A cam 12 is provided inside the housing 10, and the center of the cam 12 is sleeved and fixed to the outside of the rotating shaft 11.

[0028] The damping module 20 includes a damping sleeve 21, a push rod damper 22, an adjusting bolt 23, and a baffle 24. The damping sleeve 21 is rotatably located inside the housing 10 on the side away from the cam 12. A pull rod 13 is provided between the cam 12 and the damping sleeve 21. One end of the pull rod 13 is hinged to the protrusion of the cam 12. One end of the pull rod 13 is fitted with a spring. The end of the spring near the cam 12 abuts against one end of the pull rod 13, and the other end of the spring abuts against the damping sleeve 21. One end of the adjusting bolt 23 passes through the damping sleeve 21 and is connected to the other end of the pull rod 13. The baffle 24 is located at the other end of the adjusting bolt 23, and the push rod damper 22 is located in the damping sleeve 21. The output rod of the push rod damper 22 contacts the baffle 24.

[0029] The housing 10 is fixed in the door leaf, and the pivot 11 extending out of the housing 10 is fixedly connected to the door leaf, so that the door leaf and the door frame are connected.

[0030] Please refer to Figure 4 When the door is in the open state, the rotating shaft 11 drives the cam 12 to rotate. When the angle between the cam 12 and the pull rod 13 is set to 0°, the spring is compressed to the maximum to form a dead angle, so that the cam 12 and the pull rod 13 are self-locked. At this time, under no force, the buffer is in the stopped state and remains in the open fixed position.

[0031] Please refer to Figure 5 When an external force pushes the door leaf, the door leaf drives the rotating shaft 11 to rotate. The cam 12 of the rotating shaft 11 drives the pull rod 13 to swing, and the angle between the cam 12 and the pull rod 13 changes. The restoring force of the spring will push the pull rod 13 to slide towards the cam 12. The pull rod 13 and the cam 12 form a linkage, causing the cam 12 to rotate in the closing direction. At this time, the door begins to close automatically under the action of the spring push.

[0032] Since the adjusting bolt 23 is fixed on the pull rod 13, when the spring pushes the pull rod 13 to slide, the adjusting bolt 23 slides together, and drives the stop block to slide as well. The stop block pushes the output rod into the body of the push rod damper 22, and the push rod damper 22 is activated to generate damping force to prevent the stop block from pressing in. The reaction force is transmitted to the pull rod 13 through the adjusting bolt 23, which ultimately offsets part of the spring's thrust, forcing the closing speed to slow down. Externally, this results in a buffering effect when the door closes.

[0033] When the relative position of the adjusting bolt 23 and the pull rod 13 is adjusted, the relative distance between the pull rod 13 and the damping sleeve 21 is changed, which forces the current compression preload of the spring installed between them to change, thereby changing the closing force and realizing the adjustable closing speed function.

[0034] The above structure achieves the automatic door closing effect using a flattened design, reducing the size and thickness while still allowing for damping adjustment to meet people's installation and usage needs.

[0035] In the above scheme, the housing 10 includes a bottom cover 101 and an upper cover 102. The bottom cover 101 and the upper cover 102 are detachably connected to form an installation carrier. The rotating shaft 11 is set perpendicular to the bottom cover 101, and the rotating shaft 11 is rotatably connected to the upper cover 102 and the bottom cover 101 respectively through rolling bearings 14. The surface of the rotating shaft 11 extending out of the bottom cover 101 is provided with a mounting flat part. The mounting flat part is connected to the outer door leaf to transmit the closing angle information and prevent relative rotation between the rotating shaft 11 and the door leaf.

[0036] Furthermore, an end face bearing 14 is provided on the side of the rotating shaft 11 corresponding to the upper cover 102, which is used to reduce the end face friction caused by the weight of the door leaf and ensure smooth rotation.

[0037] Please refer to Figure 6 and Figure 7 A sliding plate 30 is provided on one side of the upper cover 102 of the housing 10. The sliding plate 30 is slidably connected to the surface of the upper cover 102. A clearance groove 31 is provided on the surface of the sliding plate 30 corresponding to the rotating shaft 11. A boss 32 is provided vertically on the side of the sliding plate 30 near the housing 10. A sliding groove 16 is provided on the housing 10 corresponding to the boss 32. The boss 32 is set in the sliding groove 16. An adjusting screw 17 is provided in the sliding groove 16. The adjusting screw 17 is rotatably set in the housing 10. The adjusting screw 17 is threadedly connected to the boss 32.

[0038] The adjusting screw 17 is turned by an external wrench. The adjusting screw 17 rotates but does not move in the housing 10. The boss 32 on the slide plate 30 is stuck in the slide groove 16 of the housing 10 and cannot rotate. The boss 32 is threadedly connected to the adjusting screw 17, which pushes the boss 32 to move horizontally along the adjusting screw 17, changing the relative position of the slide plate 30 and the housing 10, thus realizing the position adjustment function.

[0039] The slide plate 30 has fixing holes on its surface, and the housing 10 has through holes 18 corresponding to the fixing holes. Tools such as screwdrivers can be passed through the through holes 18 on the housing 10 to lock the positioning screws 33 in the fixing holes to the holes on the door frame, so that the slide plate 30 is fixed on the door frame. At this time, by turning the position of the adjusting screw, the slide plate is locked and cannot move. Then the housing 10 moves back and forth relative to the slide plate to adjust the installation of the door leaf, so that the rotating shaft 11 on the housing 10 can be aligned with the holes of the door leaf for better installation.

[0040] The surface of the top cover 102 is provided with a T-shaped post 103, and the surface of the slide plate 30 is provided with a corresponding guide groove 34. The T-shaped post 103 is slidably disposed in the guide groove 34. The slide plate 30 is restricted to the surface of the housing 10 by the T-shaped post 103, and the sliding direction of the slide plate 30 is restricted by the guide groove 34.

[0041] A connector 131 is provided at one end of the pull rod 13 near the cam 12. The connector 131 is used to limit the movement of the spring. The connector 131 is hinged to the cam 12 by a pin, and a washer 132 is provided between the connector 131 and the cam 12. The friction between the connector 131 and the cam 12 ensures that the rotation is smooth.

[0042] The damping sleeve 21 has a positioning hole 211 in the middle, and the housing 10 has a corresponding positioning post 19 inside. The damping sleeve 21 is rotatably connected to the positioning post 19 through the positioning hole 211. One end of the damping sleeve 21 has a placement cavity, and the other end of the spring is placed in the placement cavity. The adjusting bolt 23 extends into the placement cavity and is threadedly connected to the pull rod 13.

[0043] There are two push rod dampers 22, which are located on both sides of the adjusting bolt 23 to balance the forces at both ends of the baffle and prevent overturning when the push rod damper 22 is compressed.

[0044] This utility model provides a flat, adjustable automatic door closing buffer, in which the housing is fixed in the door leaf, and the rotating shaft extending out of the housing is fixedly connected to the door leaf, so that the door leaf and the door frame are connected.

[0045] When the door is in the open position, the rotating shaft drives the cam to rotate. When the angle between the cam and the pull rod is set to 0°, the spring is compressed to the maximum to form a dead angle, which makes the cam and the pull rod self-lock. At this time, under no force, the buffer is in the stopped state and stays in the open fixed position.

[0046] When an external force is applied to push the door leaf, the door leaf drives the rotating shaft to rotate. The cam on the rotating shaft drives the pull rod to swing, and the angle between the cam and the pull rod changes. The restoring force of the spring will push the pull rod to slide towards the cam side. The pull rod and the cam are linked together, causing the cam to rotate in the closing direction. At this time, the door begins to close automatically under the action of the spring.

[0047] Since the adjusting bolt is fixed to the pull rod, when the spring pushes the pull rod to slide, the adjusting bolt slides together, and the stop block also slides together. The stop block pushes the output rod into the push rod damper body, and the push rod damper is activated to generate damping force to prevent the stop block from pressing in. The reaction force is transmitted to the pull rod through the adjusting bolt, which ultimately cancels out part of the spring's thrust, forcing the door to close slower. Externally, this results in a buffering effect when the door closes.

[0048] When the relative position of the adjusting bolt and the pull rod is adjusted, the relative distance between the pull rod and the damping sleeve is changed, which forces the current compression preload of the spring installed between them to change, thereby changing the closing force and realizing the adjustable closing speed.

[0049] The above structure achieves the automatic door closing effect using a flattened design, reducing the size and thickness while still allowing for damping adjustment to meet people's installation and usage needs.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A flat type adjustable automatic door closer buffer, characterized by, The device includes a housing, a rotating shaft, and a damping module. One end of the rotating shaft is inserted into the housing for rotatable connection, and the other end extends out of the housing for fixed connection to an external door. A cam is provided inside the housing, and the center of the cam is fitted and fixed to the outside of the rotating shaft. The damping module includes a damping sleeve, a push rod damper, an adjusting bolt, and a baffle. The damping sleeve is rotatably located inside the housing away from the cam. A pull rod is provided between the cam and the damping sleeve. One end of the pull rod is hinged to the cam's protrusion. One end of the pull rod is fitted with a spring. The end of the spring near the cam abuts against one end of the pull rod, and the other end of the spring abuts against the damping sleeve. One end of the adjusting bolt passes through the damping sleeve and connects to the other end of the pull rod. The baffle is located at the other end of the adjusting bolt, and the push rod damper is located in the damping sleeve. The output rod of the push rod damper contacts the baffle.

2. A flat type adjustable automatic door closer damper according to claim 1, wherein, The housing includes a bottom cover and a top cover, which are detachably connected to form an installation carrier. The rotating shaft is set perpendicular to the bottom cover and is rotatably connected to the top cover and the bottom cover respectively through rolling bearings. The surface of the rotating shaft extending out of the bottom cover is provided with an installation flat position.

3. A flat type adjustable automatic door closer damper according to claim 2, wherein, The rotating shaft is provided with an end face bearing on the side corresponding to the upper cover.

4. The flat type adjustable automatic door closer damper according to claim 2, wherein, The upper cover of the housing is provided with a sliding plate on one side, which is slidably connected to the surface of the upper cover. The surface of the sliding plate is provided with a clearance groove corresponding to the pivot. The sliding plate is provided with a boss on the side near the housing. The housing is provided with a sliding groove corresponding to the boss. The boss is set in the sliding groove. An adjusting screw is provided in the sliding groove. The adjusting screw is rotatably set in the housing and is threadedly connected to the boss. The surface of the sliding plate is provided with a fixing hole. The housing is provided with a through hole corresponding to the fixing hole. A positioning screw is provided in the fixing hole.

5. A flat type adjustable automatic door closer damper according to claim 4, wherein The upper cover surface is provided with T-shaped posts, and the slide plate surface is provided with corresponding guide grooves. The T-shaped posts are slidably disposed in the guide grooves.

6. The flat type adjustable automatic door closer damper according to claim 1, wherein, The pull rod has a connector near the cam end. The connector is used to limit the movement of the spring. The connector is hinged to the cam by a pin, and a washer is provided between the connector and the cam.

7. The flat type adjustable automatic door closer damper according to claim 1, wherein, The damping sleeve has a positioning hole in the middle, and a corresponding positioning post is provided inside the housing. The damping sleeve is rotatably connected to the positioning post through the positioning hole. One end of the damping sleeve has a placement cavity, and the other end of the spring is located in the placement cavity. The adjusting bolt extends into the placement cavity and is threadedly connected to the pull rod.

8. A flat type adjustable automatic door closer damper according to claim 7, wherein There are two push rod dampers, which are located on both sides of the adjusting bolt.

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