Spiral buffer structure of door opener

Abstract

A spiral buffer structure of a door opener comprises a rotating shaft, a gear and a retaining assembly, an external threaded rod is arranged at the end of the rotating shaft, an internal threaded hole is axially formed in the gear, the gear is in threaded connection with the external threaded rod through the internal threaded hole, and the retaining assembly is locked at the end of the external threaded rod and limits the gear on the external threaded rod. A front buffering elastic piece and a rear buffering elastic piece which are matched in an abutting mode are arranged on the front side and the rear side of the gear respectively, the front buffering elastic piece and the rear buffering elastic piece are connected to the outer threaded rod, and the spiral buffering structure can achieve the buffering effect in the opening and closing process or the door closing process. The buffering effect can prevent the rack on the horizontal sliding door from jumping, and noise generated by collision between the rack and the gear due to the jumping is avoided at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of door opener, concretely is spiral buffer structure of door opener. BACKGROUND

[0002] The current sliding door adopts door opener drive to realize sliding opening or sliding closing, specifically, a motor is arranged in the door opener, a rotating shaft is connected to the output end of the motor, a gear is fixedly connected to the rotating shaft, and a rack is fixedly connected to the corresponding sliding door along the door opening and closing direction, the rack is engaged with the gear, and the sliding door is driven to open and close through the forward and reverse rotation of the motor, but it is found in actual use that when the sliding door is opened or closed to a specified position or the sliding door hits a person or an object and is suddenly stopped (the rotating shaft and the gear stop), the inertia of the sliding opening will drive the rack to continuously move, thereby causing the rack and the gear to jump teeth, the collision caused by the tooth jumping will cause great noise, and even the sliding door can be stuck and cannot be opened or closed again, the experience of the sliding door is reduced, the rack and the gear are worn due to frequent tooth jumping and collision, the service life of the sliding door is affected, and the safety is low, so the opening and closing structure of the current sliding door needs to be further improved. SUMMARY

[0003] The utility model aims at solving the above -mentioned existing problem, provides a kind of simple structure, reasonable spiral buffer structure of door opener, its main role is to realize buffering effect, prevent rack to appear tooth jumping situation, reduce noise.

[0004] The spiral buffer structure of the door opener includes a rotating shaft, a gear and a retreat-stop assembly. The end of the rotating shaft is provided with an external threaded rod. The gear is axially provided with an internal threaded hole. The gear is screwed on the external threaded rod through the internal threaded hole. The retreat-stop assembly is locked at the end of the external threaded rod and limits the gear on the external threaded rod. The front and rear sides of the gear are respectively provided with a front buffer elastic member and a rear buffer elastic member in abutment. The front and rear buffer elastic members are connected to the external threaded rod.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific scheme, a limiting step surface is arranged between the rotating shaft and the external threaded rod. The rear buffer elastic member is abutted between the limiting step surface and the rear side of the gear. The front buffer elastic member is abutted between the retreat-stop assembly and the front side of the gear.

[0007] As a further scheme, the front and rear buffer elastic members further include a silica gel gasket, which is abutted between the butterfly spring and the gear.

[0008] As a further solution, recessed grooves are provided on the front and rear sides of the gear, and the butterfly spring and silicone gasket are accommodated in the front recessed groove.

[0009] As a further solution, recessed grooves are provided on the front and rear sides of the gear, and the butterfly spring and silicone gasket are accommodated in the front recessed groove.

[0010] As a further solution, the backstop assembly includes a rear backstop nut, a backstop washer and a front backstop nut which are sequentially threaded on the external threaded rod, and the rear backstop nut and the front backstop nut form a locking fit with the external threaded rod through the backstop washer.

[0011] As a further solution, an inner stop block is provided on the inner circumferential surface of the stop washer, and the inner stop block extends toward the rear side. A locking groove is provided on the outer circumferential surface of the externally threaded rod, and the inner stop block is embedded in the locking groove, so that the stop washer and the externally threaded rod form a locking fit.

[0012] As a further solution, an outer stop protrusion is provided on the outer circumferential surface of the stop washer corresponding to the inner stop protrusion, and the outer stop protrusion is extended to the front side. A plurality of evenly distributed front stop grooves are provided on the outer circumferential surface of the front stop nut, and the outer stop protrusion is embedded in the front stop groove to form a locking fit between the front stop nut and the stop washer.

[0013] As a further solution, the outer circumferential surface of the stop washer is also provided with a plurality of stop folding pieces, and the outer circumferential surface of the rear stop nut is provided with a plurality of evenly distributed rear stop grooves; one of the stop folding pieces is folded into one of the rear stop grooves, and the other stop folding piece is folded into the front stop groove, so that the rear stop nut, the front stop nut and the stop washer form a locking fit.

[0014] As a further solution, the butterfly spring in the front buffer elastic member and the butterfly spring in the rear buffer elastic member are sleeved on the external threaded rod in opposite directions.

[0015] The spiral buffer structure of the door opener of the present invention can continue to rotate after the rotating shaft stops rotating instantly during the process of opening or closing the door, and move forward or backward a short distance along the external threaded rod, thereby compressing the front buffer elastic part or the rear buffer elastic part, and after the energy storage of the front buffer elastic part or the rear buffer elastic part gradually increases, the sliding door can be slowly stopped, thereby achieving a buffering effect, which can improve the safety of opening the door, and the buffering effect can also prevent the rack on the sliding door from jumping teeth, and at the same time avoid the noise caused by the collision between the rack and the gear due to tooth jumping, prevent the rack or gear from wearing out prematurely, and increase the service life of the door opener. It has the advantages of simple structure, easy assembly, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Fig. 1 It is an embodiment structure schematic view of the utility model.

[0017] Fig. 2 It is a spiral buffer structure section structure schematic view of the utility model.

[0018] Fig. 3 It is an exploded structure schematic view of the spiral buffer structure of the utility model.

[0019] Fig. 4 It is a stop washer structure schematic view of the utility model. Specific implementation

[0020] The utility model is further explained below in connection with the drawings and embodiments.

[0021] Reference Figs. 1 to 4 As shown in the figure, the spiral buffer structure of the door opener, including rotating shaft 1, gear 2 and stop component 3, the end of rotating shaft 1 is equipped with external thread rod 11, gear 2 is axially equipped with internal thread hole 201, gear 2 is screwed on external thread rod 11 through internal thread hole 201, stop component 3 is locked in the end of external thread rod 11 and limits gear 2 on external thread rod 11, and the front and rear sides of gear 2 are respectively equipped with front buffer elastic member 4 and rear buffer elastic member 5 that abut each other, front buffer elastic member 4 and rear buffer elastic member 5 are connected on external thread rod 11.

[0022] Limiting step surface 12 is equipped between rotating shaft 1 and external thread rod 11, rear buffer elastic member 5 abuts between limiting step surface 12 and the rear side of gear 2, front buffer elastic member 4 abuts between stop component 3 and the front side of gear 2, limiting step surface 12 can limit the assembly position of rear buffer elastic member 5, can be integrally formed with rotating shaft 1 and external thread rod 11 when processing, reduces the number of assembly components, and improves production efficiency.

[0023] Front buffer elastic member 4 and rear buffer elastic member 5 all include two or more than two laminated butterfly springs 6, butterfly spring 6 is sleeved on external thread rod 11, adopts butterfly spring 6 to realize buffer elastic member 4, mainly because butterfly spring 6 has the advantages of short stroke, heavy load, small required space, long service life, etc., can provide larger load when gear 2 compresses butterfly spring 6, and the use of large sliding door is satisfied.

[0024] Front buffer elastic member 4 and rear buffer elastic member 5 also include silica gel washer 7, silica gel washer abuts between butterfly spring 6 and gear 2, silica gel washer 7 can avoid direct friction between butterfly spring 6 and gear 2 while providing elasticity, can avoid wear and tear and reduce noise.

[0025] The front and rear sides of the gear 2 are provided with recessed grooves 202, the butterfly spring 6 and the silica gel washer 7 are accommodated in the front recessed groove 202; the original appearance between the rotating shaft 1 and the gear 2 can be maintained, the door opener can be kept compact, and the extra components will not affect the original structure of the door opener.

[0026] The retreat stop assembly 3 comprises a rear retreat stop nut 31, a retreat stop washer 32 and a front retreat stop nut 33 which are sequentially screwed on the outer threaded rod 11, the rear retreat stop nut 31 and the front retreat stop nut 33 are locked and matched with the outer threaded rod 11 through the retreat stop washer 32; the retreat stop assembly 3 of this structure can be loosened or fallen off after installation, ensuring that the gear 2 can be locked on the outer threaded rod 11.

[0027] Specifically, the inner circumference of the retreat stop washer 32 is provided with an inner retreat stop protrusion 321 which is extended to the rear side, the outer circumference of the outer threaded rod 11 is provided with a locking through groove 13, the retreat stop washer 32 is locked and matched with the outer threaded rod 11 by embedding the inner retreat stop protrusion 321 into the locking through groove 13; this structure makes the retreat stop washer 32 rotate with the rotating shaft 1.

[0028] The outer circumference of the retreat stop washer 32 corresponding to the inner retreat stop protrusion 321 is provided with an outer retreat stop protrusion 322 which is extended to the front side, the outer circumference of the front retreat stop nut 33 is provided with a plurality of front retreat stop grooves 331 which are uniformly distributed, the front retreat stop nut 33 is locked and matched with the retreat stop washer 32 by embedding the outer retreat stop protrusion 322 into the front retreat stop groove 331; this structure makes the front retreat stop nut 33 rotate with the rotating shaft 1, and prevents the front retreat stop nut 33 from loosening by rotating in the opposite direction.

[0029] The outer circumference of the retreat stop washer 32 is also provided with a plurality of retreat stop flaps 323, the outer circumference of the rear retreat stop nut 31 is provided with a plurality of rear retreat stop grooves 311 which are uniformly distributed; one retreat stop flap 323 is folded into one rear retreat stop groove 311, and the other retreat stop flap 323 is folded into the front retreat stop groove 331, so that the rear retreat stop nut 31, the front retreat stop nut 33 and the retreat stop washer 32 are locked and matched; this structure makes the rear retreat stop nut 31 rotate with the rotating shaft 1, and prevents the rear retreat stop nut 31 from loosening by rotating in the opposite direction.

[0030] The rear retreat stop nut 31, the retreat stop washer 32 and the front retreat stop nut 33 are locked and matched through multiple locking, which can further improve the retreat effect and avoid the gear 2 moving forward and pushing out the retreat stop assembly 3.

[0031] The butterfly springs 6 in the front buffering elastic members 4 and the butterfly springs 6 in the rear buffering elastic members 5 are sleeved on the outer threaded rod 11 in opposite directions; the different direction arrangement can cope with different compression directions of the gear to the butterfly springs 6 (corresponding to the opposite directions of the opening door and the closing door).

[0032] The above is the preferred scheme of the present application, which shows and describes the basic principle, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, which all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A spiral buffer structure of a door opener, comprising a rotating shaft (1), a gear (2) and a retreat-stop assembly (3), characterized in that: The end of the rotating shaft (1) is provided with an external threaded rod (11), the gear (2) is axially provided with an internal threaded hole (201), the gear (2) is screwed on the external threaded rod (11) through the internal threaded hole (201), the retreat-stop assembly (3) is locked at the end of the external threaded rod (11) and limits the gear (2) on the external threaded rod (11), and the front and rear sides of the gear (2) are respectively provided with a front and a rear buffer elastic member (4) and (5) in abutting cooperation, and the front and rear buffer elastic members (4) and (5) are connected on the external threaded rod (11).

2. The spiral type buffering structure of a door opener according to claim 1, wherein: The rotating shaft (1) is provided with a limiting step surface (12) between the external threaded rod (11), the rear buffer elastic member (5) is abutted between the limiting step surface (12) and the rear side of the gear (2), and the front buffer elastic member (4) is abutted between the retreat-stop assembly (3) and the front side of the gear (2).

3. The spiral type buffering structure of a door opener according to claim 1, wherein: The front and rear buffer elastic members (4) and (5) each include two or more butterfly springs (6) stacked, and the butterfly springs (6) are sleeved on the external threaded rod (11).

4. The spiral type buffering structure of a door opener according to claim 3, wherein: The front and rear buffer elastic members (4) and (5) further include a silica gel gasket (7), and the silica gel gasket is abutted between the butterfly spring (6) and the gear (2).

5. The spiral type buffering structure of a door opener according to claim 4, wherein: The front and rear sides of the gear (2) are each provided with a recessed groove (202), and the butterfly spring (6) and the silica gel gasket (7) are accommodated in the front recessed groove (202).

6. The spiral type buffering structure of a door opener according to claim 1, wherein: The retreat-stop assembly (3) includes a rear retreat-stop nut (31), a retreat-stop gasket (32) and a front retreat-stop nut (33) which are sequentially screwed on the external threaded rod (11), and the rear retreat-stop nut (31) and the front retreat-stop nut (33) are locked and cooperated with the external threaded rod (11) through the retreat-stop gasket (32).

7. The spiral type buffering structure of a door opener according to claim 6, wherein: An inner retreat-stop protrusion (321) is arranged on the inner circumferential surface of the retreat-stop gasket (32) and extends rearward, a locking through groove (13) is arranged on the outer circumferential surface of the external threaded rod (11), and the inner retreat-stop protrusion (321) is embedded in the locking through groove (13) to lock and cooperate the retreat-stop gasket (32) with the external threaded rod (11).

8. The spiral type buffering structure of a door opener according to claim 7, wherein: An outer retreat-stop protrusion (322) is arranged on the outer circumferential surface of the retreat-stop gasket (32) corresponding to the inner retreat-stop protrusion (321) and extends forward, a plurality of front retreat-stop grooves (331) are arranged on the outer circumferential surface of the front retreat-stop nut (33) and are uniformly distributed, and the outer retreat-stop protrusion (322) is embedded in the front retreat-stop grooves (331) to lock and cooperate the front retreat-stop nut (33) with the retreat-stop gasket (32).

9. The spiral bumper structure of a door opener according to any one of claims 6 to 8, characterized in that: The outer circumferential surface of the back-off washer (32) is further provided with a plurality of back-off flaps (323), and the outer circumferential surface of the back back-off nut (31) is provided with a plurality of back back-off slots (311) uniformly distributed; one back-off flap (323) is folded into one back back-off slot (311), and another back-off flap (323) is folded into a front back-off slot (331), so that the back back-off nut (31), the front back-off nut (33) and the back-off washer (32) are locked together.

10. The spiral type buffering structure of a door opener according to claim 3, wherein: The butterfly spring (6) in the front buffer elastic member (4) and the butterfly spring (6) in the rear buffer elastic member (5) are sleeved on the outer threaded rod (11) in opposite directions.

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