CN2769449Y

CN2769449Y - Door-closing device

Info

Publication number: CN2769449Y
Application number: CN 200420103217
Authority: CN
Inventors: 罗永华
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-30
Filing date: 2004-12-30
Publication date: 2006-04-05
Anticipated expiration: 2014-12-30

Abstract

The utility model discloses a door closing device which comprises a shell body connected with a door leaf and a crank arm connected with a door frame, wherein a turning block which can rotate around the shaft line of the shell body and a moving block which can be limited to move on the shaft line of the shell body are arranged inside the shell body. The spiral curved surfaces of one end of the turning block and one end of the moving block are contacted. The other end of the turning block is extended out of the shell body to connect with the end of the crank arm. The other end of moving block conflicts with the shell body through a spring. The door closing device can automatically close a door and open the door to position, and has small shock for the door frame and a wall. The utility model has the advantages of simple structure, firmness, remote possibility of damage, small size and little influence to the appearance of the door leaf.

Description

Door closer

Technical field

The utility model relates to door closer.

Background technology

On the door of office, public place etc., the standing door closer that is equipped with realizes cutting out automatically of door leaf.Common door closer adopts hydraulic pressure or pneumatic structure mostly, complex structure, and volume is bigger, and can not be fixed on door opening state to door leaf.The patent No. is that 95204714.4 Chinese utility model patent discloses a kind of " multi-functional automatic door closer ", and it can realize closing automatically the door and the location of opening the door, but volume is big, and the damage easily in use of torsion spring wherein.

The utility model content

Main purpose of the present utility model provides a kind of simple in structure, and volume is little, the non-damageable door closer of use.

The further purpose of the utility model provides a kind of door closer of location of realizing opening the door.

For reaching above-mentioned main purpose, the utility model adopts following technical scheme: this door closer, comprise housing that is connected with door leaf and cranking arm of being connected with doorframe, a movable block that can move on the moving block of housing rotational and axis that is limited in housing is arranged in the housing; One end of moving block contacts with spiral camber with an end of movable block, and the moving block other end stretches out outside the housing and with the end of cranking arm and is connected, and is inconsistent by spring between the movable block other end and the inner walls.

Spiral camber on described moving block and the movable block is formed by connecting by four sections head and the tail respectively, forms two crests and two troughs respectively; Under the door leaf closure or the positioning states that opens the door, the crest on the moving block is absorbed in the trough bottom on the movable block, and the crest of movable block is absorbed in the trough bottom of moving block.

In order to guarantee that moving block and movable block keep coaxial in motion process, the center of described moving block or movable block is a cylinder, and described spiral camber is distributed in cylindrical periphery; Correspondingly, the center of movable block or moving block is a circular hole with the cylinder matched in clearance, and spiral camber is distributed in the periphery of circular hole; Described cylinder stretches in the described circular hole.

Stretch out the outer end of housing on the described moving block and be the gengon shape, the end of cranking arm with the connection that doorframe connects has corresponding polygon hole, polygon borehole jack on gengon, thereby realize cranking arm conversion between swing and the rotor rotation.

In order to slow down the speed of spring reset, the utility model adopts following improvement structure: close spring is the cylindrical shape blind pipe for one section on the described movable block, and an end of guiding cornice joint ring inserts in this blind pipe, and the other end is fixed on the housing; On the inner tube wall of blind pipe pore is arranged, the ball that there is sealing ring at the pore place and can moves radially along blind pipe.Described movable block can comprise two sections that diameter does not wait, and the external diameter of described blind pipe place end is littler than the external diameter of the other end, and spring the inner then is enclosed within outside the blind pipe; Transformation place of described external diameter has recess, and described ball and sealing ring place in the recess, and pore is located at the sealing ring below.

Door closer of the present utility model is to use like this: housing is fixedly mounted on the door leaf top, and the end of cranking arm is fixed on the doorframe, and the other end of cranking arm stretches out housing parts with moving block and is connected.When door leaf cut out, the cylinder at moving block center inserted in the circular hole at movable block center in the housing, and the spiral camber on the moving block contacts with maximum area with spiral camber on the movable block, and spring is the longest at this moment.Door leaf is pushed open, crank arm and drive the moving block rotation, because movable block is limited and can not rotates with moving block, thereby the spiral camber of moving block just promotes movable block and moves outward, the crest of the spiral camber on the movable block (or moving block) leaves the trough on the moving block (or movable block) gradually, and spring is compressed; Continue to push, when the crest of moving block arrived the crest of movable block, spring was depressed into the shortest; Door leaf promotes forward a bit a little again, crest on the movable block (or moving block) begins to enter another trough on the moving block (or movable block), at this moment, stop to push, under the effect that spring recovers, movable block is gone forward side by side into this another trough toward pushing back by spring, moving block is moved piece promote to continue to turn an angle forward after, each crest is absorbed in the corresponding trough fully, and door leaf locks under door opening state.When needs are shut door, as long as after in the other direction door leaf being promoted certain angle and makes arbitrary crest enter adjacent trough, stop to push, door closer just can close door automatically.If do not need door leaf is locked in door opening state, as long as pushing away the amplitude of (drawing) door, the people on turnover doorway is not enough to make a crest to leave corresponding trough to enter adjacent trough, door closer just can close door leaf automatically.

Uphold in the reseting procedure at spring, the space in the blind pipe increases, and ball is blocked pore, and the blind pipe internal gas pressure reduces, and has increased the moving resistance of movable block, thereby has slowed down the reset speed of spring, has reduced the bump of door leaf to doorframe or wall.In the length of spring compressed process, the space reduces in the blind pipe, and the air of the inside is discharged from pore, thereby does not have draught head inside and outside the blind pipe, can not influence moving of movable block.

Door closer of the present utility model can realize closing automatically the door and the location of opening the door, and is little to the bump of doorframe and wall; And simple in structure, firm, rapid wear piece not, volume is little, and is little to the door leaf appearance effects.

Description of drawings

Fig. 1 is the external structure schematic diagram (not shown cranking arm) of the utility model door closer.

Fig. 2 is the STRUCTURE DECOMPOSITION figure of door closer.

Fig. 3 is the structural representation that closes door closer under the door or the positioning states that opens the door.

The structural representation of door closer when Fig. 4 is moving block crest arrival movable block crest.

Fig. 5 is the sectional view that closes door closer under the door or the positioning states that opens the door.

The specific embodiment

As shown in Figure 1: around door closer housing 1, a plurality of installing holes 11 are arranged; Door closer one end has an outer circular hole 12, and the outer end of movable block 2 is stretched out outside the housing outside this circular hole; The movable block outer end is gengon 23, is convenient to be connected and realizes the moving block rotation and the conversion between swinging of cranking arm with the (not shown) of cranking arm is terminal.During use housing 1 is fixed on the door leaf top, the end of cranking arm is fixed on the doorframe, the other end links to each other with moving block 2 outer ends and gets final product.

As shown in Figure 2, moving block 2, movable block 3, spring 4, lead 5 and joint ring 51, ball 7 and sealing ring 8 etc. are arranged in housing 1.Moving block 2 outer ends are passed outer circular hole 12 and are stretched out outside the housing.In order to reduce wearing and tearing, guarantee moving block 2 can be mutually to foreign round hole 12 rotate smoothly, moving block 2 and outside be provided with plastics change 6 between the circular hole 12.Moving block 2 inner central authorities are that the spiral camber 21 that 22, four sections head and the tail of cylinder connect is looped around cylinder 22 peripheries, form two crest a and two trough b.Movable block 2 inner central authorities are and the circular hole 32 of cylinder 22 matched in clearance that circular hole 32 peripheries are four sections same spiral cambers 31, form same two crest a and two trough b, and are complementary mutually with the spiral camber 21 on the moving block 2.The outer end of movable block 3 is external diameter cylindrical shape blind pipe 33 (see figure 5)s little than the spiral camber external diameter, and the end that lead 5 is with joint ring 51 inserts in the blind pipe 33, and the other end then is positioned at the other end of housing.Spring 4 is enclosed within outside blind pipe 33 and the lead 5.In movable block 3 external diameter transformations place, recess 34 (see figure 5)s are arranged, recess 34 is built-in with ball 7 and sealing ring 8, and there is a pore 35 that leads to blind pipe 33 the inners sealing ring 8 belows.For movable block 3 is not rotated relative to housing 1, moving block 3 peripheries have guiding projection 36, can only move along the axially directed groove 13 in the housing.

Close under the state, the door closer internal construction as shown in Figure 3.Along with door leaf is open, the (not shown) of cranking arm is pulled moving block 2 and is rotated, and the spiral camber 21 of moving block 2 promotes movable block 3 and moves axially along housing, and spring 4 is compressed gradually.When the crest a of moving block 2 arrives the crest a of movable block 3, promptly moving block 2 has rotated 90 when spending, and as shown in Figure 4, spring 4 is depressed into the shortest.To rotating a bit slightly forward, each crest a begins to enter next trough b to moving block 2 more at this moment, because the effect that elasticity is recovered, spring 4 is movable block 3 past pushing back, thereby promotion moving block 2 continues to rotate forward.When crest a arrived this next trough b bottom, door leaf was locked in door opening state, and the door closer internal construction is got back to again as shown in Figure 3, had just relatively rotated 180 degree between moving block 2 and the movable block 3.

In the spring reset process, as shown in Figure 5, the space c of blind pipe 33 the inners increases, air pressure reduces, because suction function ball 7 is blocked pore 35, space c air pressure is more and more littler in the blind pipe, hinder movable block 3 to the resistance that moving block 2 directions move thereby become, reach and slow down the purpose that spring 4 resets.In spring 4 compression processes, the gas in the c of blind pipe space is pushed ball 7 from pore 35 open and is discharged, thereby can not form pressure reduction inside and outside the blind pipe and influence the compression of spring 4.

Claims

1, a kind of door closer, comprise that the housing (1) that is connected with door leaf cranks arm with the connection that is connected with doorframe, it is characterized in that: a movable block (3) that can move on the moving block (2) of housing rotational and axis that is limited in housing is arranged in the housing (1); One end of moving block (2) contacts with spiral camber (21,31) with an end of movable block (3), moving block (2) other end stretch out housing (1) outer and be connected terminal connection of cranking arm, inconsistent between movable block (3) other end and the inner walls by spring (4).

2, door closer according to claim 1 is characterized in that: the spiral camber on described moving block (2) and the movable block (3) is formed by connecting by four sections head and the tail respectively, forms two crests (a) and two troughs (b) respectively; Under the door leaf closure or the positioning states that opens the door, the crest (a) on the moving block (2) is absorbed in trough (b) bottom on the movable block (3), and the crest (a) of movable block (3) is absorbed in trough (b) bottom of moving block (2).

3, door closer according to claim 2 is characterized in that: the center of described moving block (2) or movable block is cylinder (22), and described spiral camber (21) is distributed in the periphery of cylinder (22); Correspondingly, the center of movable block (3) or moving block is a circular hole (32) with the cylinder matched in clearance, and spiral camber (31) is distributed in the periphery of circular hole (32); Described cylinder (22) stretches in the described circular hole (32).

4, door closer according to claim 1 is characterized in that: stretch out the outer end of housing on the described moving block (2) and be gengon (23) shape, the end of cranking arm with the connection that doorframe connects has corresponding polygon hole, and polygon borehole jack is on gengon (23).

5, door closer according to claim 1 is characterized in that: described movable block (3) is gone up near spring and is a cylindrical shape blind pipe (33) for, and an end of lead (5) band joint ring (51) inserts in this blind pipe (33), and the other end is fixed on the housing (1); On the inner tube wall of blind pipe (33) pore (35) is arranged, the ball (7) that pore (35) is located sealing ring (8) and can be moved radially along blind pipe.

6, door closer according to claim 5 is characterized in that: described movable block (3) comprises two sections that diameter does not wait, and the external diameter of blind pipe (33) place end is littler than the external diameter of the other end, and spring (4) the inner then is enclosed within outside the blind pipe (33); Transformation place of described external diameter has recess (34), and described sealing ring (8) and ball (7) are located in this recess, and pore (35) is in sealing ring (8) below.