CN1085287C - Buffer for drive mechanism of telescopic door - Google Patents

Abstract

The present invention relates to a buffer for a drive mechanism of a telescopic door, which can buffer starting impact force of a telescopic door motor. A first buffer component 10, a second buffer component 20, a buffer spring 30 and a clutch 40 are orderly arranged on an output shaft 51 of a worm speed reducer 50 from the near end of the output shaft to the far end of the output shaft, wherein the first buffer component, the second buffer component and a buffer spring are sheathed on the output shaft; the clutch is fixed to the end part of the far end of the output shaft by a screw handle seat 42. The present invention can effectively absorb and eliminate the starting impact force of the motor, so the telescopic door is softly and stably started, and various problems caused by the starting impact force are thoroughly solved.

Description

Buffer for drive mechanism of telescopic door

The present invention relates to the buffer for drive mechanism of telescopic door that a kind of starting-impact power that makes the retractable door motor obtains cushioning.

Retractable door is a kind of movable gate that public place, office building, residential quarters etc. are located that is used for.This Men Yiqi is handsome in appearance, and folding with convenience is easy to automatic control, the parent that characteristics more and more are subjected to people such as is convenient to manage and looks at, and obtain more and more widely application.Existing retractable door all is to provide power by motor, drive the retractable door operation through worm-and-wheel gear or gear mechanism, a kind of " adopting the actuating unit of gear-driven retractable door " disclosed as No. 97251407 utility model patents of China, this transmission device is made up of the driving gear that is connected with motor and transition gear and driven gear, in said apparatus and other similar device, retractable door comes static fully state and starts down, sudden power during the motor starting brings certain impact force can for retractable door and driving mechanism thereof, and this impact force is directly proportional with the speed in when starting, priming speed is fast more, and impact force is also just big more.This impact force all is very disadvantageous to retractable door and driving mechanism thereof, and its adverse consequences mainly shows: one, retractable door causes starting unstable owing to starting suddenly or stopping; Two, impact force can produce a kind of impact cutting force to driving mechanism and retractable door row's connecting portion, under frequent cutting force effect, is easy to cause the damage of retractable door; Three, impact force will produce bigger impact noise.From the above mentioned, the starting-impact power of retractable door motor has become a key factor that influences the retractable door performance.Although people address this problem attempting, up to the present, the problems referred to above are effectively solved as yet.

The objective of the invention is to provides a kind of and can effectively absorb and eliminate the buffer of electric motor starting impact force for addressing the above problem, so that make the retractable door starting softer steadily, and thoroughly eliminates because the variety of issue that starting-impact power is brought.

For achieving the above object, the invention provides a kind of buffer for drive mechanism of telescopic door, this device is by output shaft near-end to far-end first buffer component 10, second buffer component 20, buffer spring 30 and clutch 40 to be housed successively on the output shaft 51 of worm reducer 50, wherein first buffer component, second buffer component, buffer spring are set on the above-mentioned output shaft, and clutch is then by revolving the distal end that seat 42 is fixed in output shaft.

Described first buffer component 10 is made of sprocket wheel 11 and cushion effect conversion sleeve 12 concentric with it and that protrude from its front end face, and both are connected as a single entity, and the tube wall leading section of above-mentioned cushion effect conversion sleeve is a curved surface.First buffer component acts on second buffer component by this curved surface.

Described second buffer component 20 has an axle sleeve 21 in axial sliding, have a keyway 211 that cooperates with above-mentioned clutch 40 on this axle sleeve inner hole wall, its outside is symmetrically fixed with a pair of rolling bearing 24 by bolt 23, this rolling bearing abuts against on the curved surface of cushion effect conversion sleeve 12 ends, and be subjected to the first buffer component effect and slide along described curved surface and to drive cushion effect conversion sleeve 12 and slide vertically, and give buffer spring 30 with the axial force transmission of first buffer component, absorbed by buffer spring.

Described clutch 40 is the eccentric clutch of key formula, it comprises revolves 41, revolves seat 42, retainer spring 43 and key 44, wherein revolve the holding arms 411 that revolves of right-hand member is extended the seat endoporus in the keyway 511 of output shaft 51 ends through revolving, the terrace 4111 of its end places on the step 441 of key 44 front portions, with the sink-float of operating key, revolve and seat is located 41 with revolving by screw 413; Revolve seat 42 is fixed by screw 421 and output shaft; Retainer spring 43 is contained in and revolves and revolve between the seat; Key 44 is mobilizable keys, and it is contained in the keyway 511 of output shaft 51 ends, and spring 443 is equipped with in its underpart, and its right-hand member end links to each other with output shaft with screw 442.This clutch is used under powering-off state, and output shaft is separated with axle sleeve, so that manually promote the retractable door folding.

The curved surface of described cushion effect conversion sleeve tube wall leading section is made up of two following cancave cambered surfaces that can adapt to the symmetry of motor positive and inverse.

As shown from the above technical solution, the combination of buffer of the present invention by first, second buffer component and buffer spring can be converted into axial force with the rotary impact power of electric motor starting moment, and absorbed fully and eliminate.Because starting-impact power is cushioned, thereby can make the retractable door starting more steadily soft, and eliminated the impact noise brought by impacting, and reduced the cutting force of the connecting portion of when impacting driving mechanism and retractable door being arranged, prolonged the application life of retractable door.Because the present invention is provided with the eccentric clutch of key formula, this clutch volume is little and be built in the axle, need not attached outward other member, and can indefinite direction operation, thereby have economical with materials, and simple to operate, be difficult for error, easily advantage such as production.From the above mentioned, the present invention not only can make the impact force of electric motor starting obtain buffering, and has improved the combination property of retractable door.The present invention also has simple and reasonable, reliable operation, characteristics such as easy to implement.

For a more detailed description below in conjunction with drawings and Examples to the present invention.

Fig. 1 is an overall structure schematic diagram of the present invention.

Fig. 2 is an exploded sketch of the present invention.

Fig. 3 be clutch be in from state the time the present invention whole sectional view.

Fig. 4 is clutch whole sectional view of the present invention when being in the state that closes.

As shown in Figure 1, buffer for drive mechanism of telescopic door of the present invention is by output shaft near-end to far-end first buffer component 10, second buffer component 20, buffer spring 30 and clutch 40 to be housed successively on the output shaft 51 of worm reducer 50.More detailed structure of the present invention can be referring to exploded view shown in Figure 2.As shown, the driving mechanism of retractable door is the same with prior art, comprises motor 60 and the worm reducer 50 that is positioned at motor lower portion and is attached thereto, and they all are contained in the housing, the output shaft 51 of worm reducer stretches out outside the housing, and buffer for drive mechanism of telescopic door of the present invention is housed on it.In this device, first buffer component 10 is made of sprocket wheel 11 and cushion effect conversion sleeve 12 concentric with it and that protrude from its front end face, and both are connected as a single entity, and sprocket wheel 11 wherein is a drive sprocket, it links to each other with driven sprocket on being contained in retractable door bottom wheel shaft by chain, drives the retractable door motion.The tube wall leading section of above-mentioned cushion effect conversion sleeve is a curved surface, this curved surface is made of the curved surface of a ridged the following cancave cambered surface of two symmetry, first buffer component acts on second buffer component by this curved surface, rotary impact power when being used for electric motor starting changes into axial force, and this curved surface can make motor can both realize above-mentioned conversion no matter during forward or reverse.This first buffer component 10 is installed on the most proximal end of output shaft, its right-hand member is equipped with bearing assembly 13, this bearing assembly is made of the thrust bearing 132 that is fixed in the bearing support 131 on the output shaft and be contained on the bearing support, be used to limit first buffer component the position of output shaft right-hand member and reduce it and positioning element between friction.Described second buffer component 20 has an axle sleeve 21 in axial sliding, have a keyway 211 that cooperates with key 44 with respect to the keyway on the output shaft 511 on this axle sleeve inner hole wall, its outside is symmetrically fixed with a pair of rolling bearing 24 by bolt 23, the axis of bearing and the axis of axle sleeve are perpendicular, and rolling bearing abuts against on the curved surface of cushion effect conversion sleeve 12 ends of first buffer component, when first buffer component rotates, bearing 24 is slided to height point along the low spot of above-mentioned curved surface, because bearing and axle sleeve are fixed, therefore bearing slides vertically will driving axle sleeve 12 in height point sliding process, with the axial force transmission of first buffer component to buffer spring 30.For reducing the friction of 30 of second buffer component and buffer springs, in the second buffer component front portion bearing 22 is housed, it acts on bearing assembly 13.Described buffer spring 30 is contained in the far-end of output shaft near second buffer component.When second buffer component be subjected to the first buffer component axial force effect and during vertically to front slide, the thrust bearing that just promotes its front end is to front slide, buffer spring 30 is compressed and the axial force of being come by the second buffer component transmission is absorbed, the starting-impact power of motor will be cushioned.Buffer of the present invention can make retractable door row satisfy and go on foot startup pulling force and the soft starting that reaches design, design startup pulling force such as retractable door is 50 kilograms, second buffer component compresses buffer spring so, then the step is compressed to 20,40,45,46 kilograms of pressure by the zero kilogram pressure that begins, till arranging soft starting, also reached the purpose that the sudden impact force when making the motor starting obtains cushioning simultaneously to the stretchy door.Described clutch 40 is the eccentric clutch of key formula, its structure as shown in Figure 3, Figure 4, it comprises revolves 41, revolves seat 42, retainer spring 43 and key 44, wherein revolve by revolve handle 412 and with it the holding arms 411 that revolves of one constitute, be positioned at the holding arms 411 that revolves that revolves the handle right-hand member and through revolving the seat endoporus extended the keyway 511 of output shaft 51 ends, its end cuts out a plane, forms a step-like terrace 4111, this terrace places on the step 441 of key 44 front portions, with the sink-float of operating key.Revolve and seat is located 41 with revolving by screw 413, this location structure is to have a horizontal slotted hole (not shown) on revolving the tube wall of seat 42, penetrate a screw 413 in this hole, the screw lower end is screwed in the cylinder that revolves handle, its upper end places revolves in the slotted hole on the seat, revolves seat is then fixed by screw 421 and output shaft.Between revolving and revolve, retainer spring 43 is housed also, is used for fixing and revolves and revolve the position between the seat seat.Described key 44 is mobilizable rectangle keys, its front end bottom have one with revolve the step 441 that front end terrace 4111 is matched, revolve front end terrace part both placed on this step.This key is contained in the keyway 511 of output shaft 51 ends, and its right-hand member flexibly connects with screw 442 and output shaft, and it can rotate around this tie point.Can upspring and enter in the keyway in the axle sleeve 21 for the front end that makes key, have a spring eye, spring 443 is housed in it in the bottom of key and the corresponding site on the output shaft keyway.Clutch of the present invention is to come the sinking of operating key 44 and bounce to reach the clutch purpose by above-mentioned rotation of revolving 41.Referring to Fig. 3, when clockwise or inhour rotate and revolve 41 the time, its terrace 4111 that revolves the holding arms end is gone to the top, in rotation process, the semi-circular portions of its end is pressed in key 44 front end steps 441 places, and key is sunk down in the keyway 511, and this moment, output shaft and axle sleeve 21 were in released state, both can rotate relatively, clutch be in from state; Referring to Fig. 4, when revolving when rotating 180 °, revolve and the terrace 4111 of end is gone to the bottom and key 44 front end steps 441 fit, key 44 front ends are subjected to spring 443 effects and pop up, and entering 211 li in keyway in the axle sleeve 21, this moment, output shaft was in bonding state with axle sleeve 21, spool can drive axle sleeve to rotate simultaneously, retractable door can normally be moved under driving mechanism drives, and clutch is in the state that closes.Above-mentioned clutch mainly uses under powering-off state, and positive and negative can the operation.After outage, driving mechanism can't turn round, and retractable door need manually be come folding.In the case, turn and revolve handle, output shaft is separated with axle sleeve 21, promptly clutch is in released state, and can make it to open or close this moment with artificial push-and-pull retractable door.

Claims (5)

1, a kind of buffer for drive mechanism of telescopic door, it is characterized in that this device is to go up at the output shaft (51) of worm reducer (50) by output shaft near-end to far-end first buffer component (10), second buffer component (20), buffer spring (30) and clutch (40) to be housed successively, wherein first buffer component, second buffer component, buffer spring are set on the above-mentioned output shaft, and clutch is then by revolving the distal end that seat (42) is fixed in output shaft.

2, buffer for drive mechanism of telescopic door according to claim 1, it is characterized in that described first buffer component (10) is made of sprocket wheel (11) and cushion effect conversion sleeve (12) concentric with it and that protrude from its front end face, both are connected as a single entity, and the tube wall leading section of above-mentioned cushion effect conversion sleeve is a curved surface.

3, buffer for drive mechanism of telescopic door according to claim 1, it is characterized in that described second buffer component (20) has an axle sleeve (21) in axial sliding, have a keyway (211) that cooperates with above-mentioned clutch (40) on this axle sleeve inner hole wall, its outside is symmetrically fixed with a pair of rolling bearing (24) by bolt (23), this rolling bearing abuts against on the curved surface of cushion effect conversion sleeve (12) end, and is subjected to the first buffer component effect and slides along described curved surface and to drive cushion effect conversion sleeve (12) and slide vertically.

4, buffer for drive mechanism of telescopic door according to claim 1, it is characterized in that described clutch (40) is the eccentric clutch of key formula, it comprises revolves (41), revolves seat (42), retainer spring (43) and key (44), wherein revolve the holding arms (411) that revolves of right-hand member is extended the seat endoporus in the keyway (511) of output shaft (51) end through revolving, the terrace of its end (4111) places on the anterior step (441) of key (44), with the sink-float of operating key, revolve (41) are located seat by screw (413) and revolving; Revolve seat (42) is fixed by screw (421) and output shaft; Retainer spring (43) is contained in and revolves and revolve between the seat; Key (44) is a mobilizable key, and it is contained in the keyway (511) of output shaft (51) end, and spring (443) is equipped with in its underpart, and its right-hand member end links to each other with output shaft with screw (442).

5, buffer for drive mechanism of telescopic door according to claim 2 is characterized in that the curved surface of described cushion effect conversion sleeve tube wall leading section is made up of two following cancave cambered surfaces that can adapt to the symmetry of motor positive and inverse.