CN220621538U - Door closer and door - Google Patents

Abstract

The utility model discloses a door closer and a door, and relates to the technical field of door and window parts; the door closer comprises a buffer sleeve; the sliding rod is slidably arranged in the limiting cylinder in a penetrating way, and one end of the sliding rod is connected with the piston; an unlocking block is arranged on the outer side of the unlocking sleeve and is matched with the face gear; be provided with the stop collar on the lateral wall of slide bar, the stop collar is provided with two and sets up along the length direction interval of slide bar, and the slide bar is located to the slidable of unlocking sleeve and rotationally cover, and the unlocking sleeve is located between two stop collars, and the distance between the stop collar is greater than the length of unlocking sleeve. Through the frictional force between unlocking sleeve and the slide bar, can reduce the speed that the slide bar continued to remove, play the buffering effect to can reduce the possibility that makes door body and wall body collision because of the dynamics of pushing the door body is too big.

Description

Door closer and door

Technical Field

The utility model relates to the technical field of door and window parts, in particular to a door closer and a door.

Background

The door closer is widely applied to different door bodies, the door closer is usually closed by a spring, namely one end of the door closer is usually arranged on the door body, the other end of the door closer is arranged on a door frame, the spring in the door closer can be compressed when the door body is opened, and after the door body is loosened by a user, the spring in the door closer can drive the door body to move so as to realize the closing of the door body; however, when the door body is opened, if the force for pushing the door body is too large, the door body is easy to collide with the wall body, and when the door body needs to be continuously opened, a heavy object is usually required to be placed at the door body in an opened state, or a person is required to manually pull the door body, so that the door body can be kept in the opened state, which makes the continuous opening of the door body provided with the door closer inconvenient.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the door closer which can enable the door body to be in an open state continuously, can reduce the speed of continuous movement of the sliding rod and has a buffering effect.

The utility model also provides a door with the door closer.

An embodiment of a door closer according to a first aspect of the utility model comprises: the fixing piece, the elastic piece and the buffer sleeve comprise a cylinder body, a piston, a slide bar, a limit cylinder, a face gear and an unlocking sleeve; the cylinder body is hollow, the limiting cylinder and the sliding rod are both arranged in the cylinder body, the piston is slidably arranged in the cylinder body and can slide towards the direction close to or far away from the piston, the fixing piece is fixedly arranged in the cylinder body and is fixedly connected with the limiting cylinder, and two ends of the elastic piece are respectively connected with the fixing piece and the piston; the limiting cylinder is arranged in a penetrating manner, a plurality of locking blocks are arranged on the inner wall of the limiting cylinder, and the locking blocks are arranged at intervals around the length direction of the limiting cylinder; the face gear is arranged in the limiting cylinder and is positioned at one side of the locking block away from the piston, and a plurality of gear teeth of the face gear are sequentially arranged around the length direction of the limiting cylinder; the locking blocks are provided with clamping grooves, the clamping grooves are provided with first inclined planes, the gear teeth are provided with second inclined planes, and the first inclined planes are arranged opposite to the second inclined plane parts of two adjacent gear teeth; the sliding rod is slidably arranged in the limiting cylinder in a penetrating mode, and one end of the sliding rod is connected with the piston; an unlocking block is arranged on the outer side of the unlocking sleeve and is matched with the face gear; be provided with the stop collar on the lateral wall of slide bar, the stop collar is provided with two and follows the length direction interval setting of slide bar, unlocking sleeve slidable and rotationally overlap to locate the slide bar, unlocking sleeve is located two between the stop collar, distance between the stop collar is greater than unlocking sleeve's length.

The door closer provided by the utility model has at least the following beneficial effects: in the embodiment of the utility model, the sliding rod is positioned in the cylinder, one end of the sliding rod is fixedly connected with the piston, the other end of the sliding rod is fixedly connected with the door body, one end of the cylinder is fixedly connected with the door frame, when the door body is opened, the sliding rod can move in the cylinder to drive the piston and the unlocking sleeve to move, the unlocking sleeve can move towards the direction close to the limiting cylinder and enter the limiting cylinder, the unlocking block on the unlocking sleeve can pass through between two adjacent locking blocks, a face gear is arranged on one side of the locking block far away from the piston, the unlocking block on the unlocking sleeve is abutted with a second inclined surface of one gear tooth on the face gear, so that the unlocking block slides on the second inclined surface of one gear tooth, the unlocking sleeve rotates, the position of the unlocking sleeve is adjusted, the piston moves towards the direction close to the limiting cylinder, and the elastic restoring force for pushing the piston to move towards the limiting cylinder is provided for the second inclined surface part of the piston to push the piston to move towards the limiting cylinder, and the unlocking sleeve can continuously rotate towards the locking sleeve through the first inclined surface; when the door body needs to be closed, the door body needs to be pushed again to drive the unlocking block on the unlocking sleeve to be abutted with the second inclined surface of the other gear tooth on the face gear, so that the unlocking block slides on the second inclined surface of the other gear tooth to enable the unlocking sleeve to rotate, the position of the unlocking sleeve is adjusted again, the elastic piece can push the piston to move to drive the unlocking sleeve to move, and when the unlocking block of the unlocking sleeve can pass through between two adjacent locking blocks to enable the unlocking sleeve to pass out of the limiting cylinder, and therefore the door body is closed; and be provided with two stop collars on the slide bar, the distance between two stop collars is greater than the length of unblock cover, make the unblock cover can remove between two stop collars, after the second inclined plane butt on unlocking piece and the face gear on the unblock cover, the slide bar continues to remove in order to drive the unblock cover and remove, make the unblock cover can remove on the slide bar, through the frictional force between unblock cover and the slide bar, can reduce the speed that the slide bar continues to remove, play the buffering effect, in order to can reduce the possibility that makes the door body collide with the wall body because of the dynamics of pushing the door body is too big, and the unblock cover removes to the stop collar butt on the slide bar, can inject the position of unblock cover on the slide bar through setting up the stop collar.

According to some embodiments of the utility model, the elastic member is a spring, the elastic member is sleeved on the sliding rod, and the elastic member is in a compressed state.

According to some embodiments of the utility model, the fixing member is provided with a placing groove, the limiting cylinder and the face gear are both arranged in the placing groove, one end, close to the bottom wall of the placing groove, of the limiting sleeve is provided with a limiting groove, and the face gear is arranged in the limiting groove.

According to some embodiments of the utility model, a plurality of annular positioning grooves are formed in the outer side wall of the sliding rod, and the limiting sleeve is arranged in the annular positioning grooves.

According to some embodiments of the utility model, a third inclined plane is arranged on one side, close to the piston, of the unlocking block, and the third inclined plane is matched with the first inclined plane.

According to some embodiments of the utility model, a fourth inclined surface is arranged on one side of the unlocking block away from the piston, and the fourth inclined surface is matched with the second inclined surface.

According to some embodiments of the utility model, the locking block is provided with a guiding ramp on the side close to the piston.

According to some embodiments of the utility model, the locking blocks are provided in plurality, and the unlocking blocks are correspondingly provided in plurality.

According to some embodiments of the utility model, the piston is provided with a limiting cylinder, the limiting cylinder is provided with a limiting cylinder, and the limiting cylinder is provided with a limiting cylinder.

A door according to an embodiment of the second aspect of the utility model comprises a number of door closers according to the above described embodiment of the first aspect of the utility model.

The door provided by the embodiment of the utility model has at least the following beneficial effects: in the embodiment of the utility model, the sliding rod is positioned in the cylinder, one end of the sliding rod is fixedly connected with the piston, the other end of the sliding rod is fixedly connected with the door body, one end of the cylinder is fixedly connected with the door frame, when the door body is opened, the sliding rod can move in the cylinder to drive the piston and the unlocking sleeve to move, the unlocking sleeve can move towards the direction close to the limiting cylinder and enter the limiting cylinder, the unlocking block on the unlocking sleeve can pass through between two adjacent locking blocks, a face gear is arranged on one side of the locking block far away from the piston, the unlocking block on the unlocking sleeve is abutted with a second inclined surface of one gear tooth on the face gear, so that the unlocking block slides on the second inclined surface of one gear tooth, the unlocking sleeve rotates, the position of the unlocking sleeve is adjusted, the piston moves towards the direction close to the limiting cylinder, and the elastic restoring force for pushing the piston to move towards the limiting cylinder is provided for the second inclined surface part of the piston to push the piston to move towards the limiting cylinder, and the unlocking sleeve can continuously rotate towards the locking sleeve through the first inclined surface; when the door body needs to be closed, the door body needs to be pushed again to drive the unlocking block on the unlocking sleeve to be abutted with the second inclined surface of the other gear tooth on the face gear, so that the unlocking block slides on the second inclined surface of the other gear tooth to enable the unlocking sleeve to rotate, the position of the unlocking sleeve is adjusted again, the elastic piece can push the piston to move to drive the unlocking sleeve to move, and when the unlocking block of the unlocking sleeve can pass through between two adjacent locking blocks to enable the unlocking sleeve to pass out of the limiting cylinder, and therefore the door body is closed; and be provided with two stop collars on the slide bar, the distance between two stop collars is greater than the length of unblock cover, make the unblock cover can remove between two stop collars, after the second inclined plane butt on unlocking piece and the face gear on the unblock cover, the slide bar continues to remove in order to drive the unblock cover and remove, make the unblock cover can remove on the slide bar, through the frictional force between unblock cover and the slide bar, can reduce the speed that the slide bar continues to remove, play the buffering effect, in order to can reduce the possibility that makes the door body collide with the wall body because of the dynamics of pushing the door body is too big, and the unblock cover removes to the stop collar butt on the slide bar, can inject the position of unblock cover on the slide bar through setting up the stop collar.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing or additional aspects and advantages of the utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of the door closer of the present utility model;

FIG. 2 is a cross-sectional view of the door closer of the present utility model;

FIG. 3 is a cross-sectional view of the barrel, stopper barrel, piston and spring of the door closer of the present utility model;

FIG. 4 is a schematic view of the structure of the piston, slide bar, unlocking sleeve and fixing member of the door closer of the present utility model;

FIG. 5 is a schematic view of the limiting cylinder and face gear of the door closer of the present utility model;

fig. 6 is a schematic structural view of another view of the limiting cylinder and face gear of the door closer of the present utility model.

Reference numerals:

a buffer sleeve 100; a cylinder 110; a communication port 111; a piston 120; a slide bar 130; a stop collar 131; a limiting cylinder 140; a locking block 141; a card slot 142; a first inclined surface 143; a guide slope 144; a face gear 150; gear teeth 151; a second inclined surface 152; unlocking sleeve 160; unlocking block 161; a third bevel 162; a fourth inclined surface 163; a fixing member 200; an elastic member 300; a mounting base 400; and a communication passage 410.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, left, right, front, rear, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

A door closer and a door according to an embodiment of the present utility model are described below with reference to fig. 1 to 6.

According to an embodiment of the first aspect of the present utility model, a door closer includes a damping sleeve 100.

The buffer sleeve 100 comprises a fixing piece 200, an elastic piece 300, a cylinder 110, a piston 120, a sliding rod 130, a limiting cylinder 140, a face gear 150 and an unlocking sleeve 160; the cylinder 110 is hollow, the limiting cylinder 140 and the sliding rod 130 are both arranged in the cylinder 110, the piston 120 is slidably arranged in the cylinder 110 and can slide towards the direction close to or far away from the piston 120, the fixing piece 200 is fixedly arranged in the cylinder 110 and is fixedly connected with the limiting cylinder 140, and two ends of the elastic piece 300 are respectively connected with the fixing piece 200 and the piston 120; the limiting cylinder 140 is arranged in a penetrating way, a plurality of locking blocks 141 are arranged on the inner wall of the limiting cylinder 140, and the plurality of locking blocks 141 are arranged at intervals around the length direction of the limiting cylinder 140; the face gear 150 is arranged in the limiting cylinder 140 and is positioned at one side of the locking block 141 away from the piston 120, and a plurality of gear teeth 151 of the face gear 150 are sequentially arranged around the length direction of the limiting cylinder 140; the locking blocks 141 are provided with clamping grooves 142, the clamping grooves 142 are provided with first inclined planes 143, the gear teeth 151 are provided with second inclined planes 152, and the first inclined planes 143 are arranged opposite to the second inclined planes 152 of two adjacent gear teeth 151; the sliding rod 130 is slidably inserted into the limiting cylinder 140, and one end of the sliding rod 130 is connected with the piston 120; an unlocking block 161 is arranged on the outer side of the unlocking sleeve 160, and the unlocking block 161 is matched with the face gear 150; the outer side wall of the slide bar 130 is provided with limiting sleeves 131, the limiting sleeves 131 are provided with two limiting sleeves and are arranged at intervals along the length direction of the slide bar 130, the unlocking sleeve 160 is slidably and rotatably sleeved on the slide bar 130, the unlocking sleeve 160 is positioned between the two limiting sleeves 131, and the distance between the limiting sleeves 131 is greater than the length of the unlocking sleeve 160.

In the embodiment of the utility model, the sliding rod 130 is positioned in the cylinder 110, one end of the sliding rod 130 is fixedly connected with the piston 120, the other end of the sliding rod 130 is fixedly connected with the door body, one end of the cylinder 110 is fixedly connected with the door frame, when the door body is opened, the sliding rod 130 can move in the cylinder 110 to drive the piston 120 and the unlocking sleeve 160 to move, the unlocking sleeve 160 can move towards the direction close to the limiting cylinder 140 and enter the limiting cylinder 140, the unlocking block 161 on the unlocking sleeve 160 can pass through between two adjacent locking blocks 141, the side of the locking block 141 far from the piston 120 is provided with the face gear 150, the unlocking block 161 on the unlocking sleeve 160 is abutted with the second inclined surface 152 of one gear tooth 151 on the face gear 150, the unlocking block 161 slides on the second inclined surface 152 of one gear tooth 151, so that the unlocking sleeve 160 rotates, and the position of the unlocking sleeve 160 is adjusted, after the piston 120 moves towards the direction approaching the limit cylinder 140, the elastic member is compressed, so that the elastic member has an elastic restoring force for pushing the piston 120 to move towards the direction away from the limit cylinder 140, and because the first inclined surface 143 is opposite to the second inclined surface 152 of the two adjacent gear teeth 151, the gas between the piston 120 and the limit cylinder 140 can push the piston 120 to move so as to drive the unlocking sleeve 160 to move towards the direction approaching the locking block 141, the unlocking block 161 on the unlocking sleeve 160 can be abutted with the first inclined surface 143 of the clamping groove 142 on the locking block 141, so that the unlocking block 161 can slide on the first inclined surface 143, thereby enabling the unlocking sleeve 160 to rotate, thereby adjusting the position of the unlocking sleeve 160, and the position of the sliding rod 130 in the cylinder 110 can be limited by the clamping groove 142 on the locking block 141, thereby enabling the door body to stop rotating, and the door body is kept in an open state; when the door body needs to be closed, the door body needs to be pushed again to drive the unlocking block 161 on the unlocking sleeve 160 to abut against the second inclined surface 152 of the other gear tooth 151 on the face gear 150, so that the unlocking block 161 slides on the second inclined surface 152 of the other gear tooth 151 to rotate the unlocking sleeve 160, thereby adjusting the position of the unlocking sleeve 160 again, and when the elastic piece 300 can push the piston 120 to move to drive the unlocking sleeve 160 to move, the unlocking block 161 of the unlocking sleeve 160 can pass through between two adjacent locking blocks 141 to enable the unlocking sleeve 160 to pass through the limiting cylinder 140, so that the door body is closed; the two limiting sleeves 131 are arranged on the sliding rod 130, the distance between the two limiting sleeves 131 is larger than the length of the unlocking sleeve 160, so that the unlocking sleeve 160 can move between the two limiting sleeves 131, after the unlocking block 161 on the unlocking sleeve 160 is abutted against the second inclined surface 152 on the face gear 150, the sliding rod 130 continues to move so as to drive the unlocking sleeve 160 to move, the unlocking sleeve 160 can move on the sliding rod 130, the speed of the continuous movement of the sliding rod 130 can be reduced through the friction between the unlocking sleeve 160 and the sliding rod 130, the buffering effect is achieved, the possibility that the door collides with a wall body due to overlarge force pushing the door body can be reduced, and the unlocking sleeve 160 moves to be abutted against the limiting sleeve 131 on the sliding rod 130, so that the position of the unlocking sleeve 160 on the sliding rod 130 can be limited through the limiting sleeve 131.

Specifically, when the unlocking sleeve 160 slides on the first inclined surface 143 through the unlocking block 161, the unlocking sleeve 160 rotates around the slide bar 130 in the clockwise direction, and when the unlocking sleeve 160 slides on the second inclined surface 152 through the unlocking block 161, the unlocking sleeve 160 likewise rotates around the slide bar 130 in the clockwise direction; of course, according to a specific practical situation, when the unlocking sleeve 160 slides on the first inclined surface 143 through the unlocking block 161, the unlocking sleeve 160 rotates around the slide bar 130 in the counterclockwise direction, and when the unlocking sleeve 160 slides on the second inclined surface 152 through the unlocking block 161, the unlocking sleeve 160 also rotates around the slide bar 130 in the counterclockwise direction.

Referring to fig. 1 to 3, it can be understood that the door closer further includes a fixing member 200 and an elastic member 300, wherein the fixing member 200 is fixedly disposed in the cylinder 110 and fixedly connected with the limiting cylinder 140; both ends of the elastic member 300 are connected to the fixing member 200 and the piston 120, respectively.

The fixing piece 200 can be fixedly installed in the cylinder 110, and the fixing piece 200 is fixedly connected with the limiting cylinder 140 so as to limit the position of the limiting cylinder 140; specifically, the fixing member 200 and the limiting cylinder 140 are both installed at one end of the cylinder 110.

The two ends of the elastic piece 300 are respectively connected with the fixing piece 200 and the piston 120, and after the sliding rod 130 moves to drive the piston 120 to move towards the limiting cylinder 140, the elastic piece 300 between the piston 120 and the fixing piece 200 can be compressed, so that the elastic piece 300 can push the fixing piece 200 and the piston 120 to move towards the direction away from each other, and the moving speed of the sliding rod 130 can be slowed down; specifically, the elastic member 300 is a spring, the spring is wound on the sliding rod 130, two ends of the spring are respectively connected with the fixing member 200 and the piston 120, and the position of the elastic member 300 can be limited through the sliding rod 130, so that the bending degree of the elastic member 300 can be reduced, and the elastic member 300 can be ensured to support and work; the elastic member 300 is always in a compressed state, so that the position of the piston 120 can be limited, and the working stability of the door closer is improved.

Referring to fig. 2 and 3, it can be understood that the fixing member 200 is provided with a placement groove, the limiting cylinder 140 and the face gear 150 are both disposed in the placement groove, one end of the limiting sleeve 131, which is close to the bottom wall of the placement groove, is provided with a limiting groove, and the face gear 150 is disposed in the limiting groove.

The positions of the limiting cylinder 140 and the face gear 150 can be limited by arranging the placing grooves; the position of the face gear 150 can be limited by providing the limit groove, so that the working stability of the door closer is improved.

Referring to fig. 2 and 4, it can be understood that a plurality of annular positioning grooves are provided on the outer sidewall of the slide bar 130, and the stop collar 131 is disposed in the annular positioning grooves.

The position of the limit groove can be limited by arranging the annular positioning groove; specifically, the stop collar 131 has elasticity, and the stop collar 131 can be sleeved on the outer side wall of the slide bar 130, and the stop groove can protrude into the annular positioning groove, so that the unlocking sleeve 160 can slide into the annular positioning groove.

Specifically, the annular positioning grooves are provided with a plurality of to be able to adapt to the two stop collars 131, wherein the plurality of annular positioning grooves are arranged at intervals along the length direction of the slide bar 130, so that the stop collars 131 can be installed in different annular positioning grooves, and the slidable distance of the stop collars 131 can be controlled.

Referring to fig. 4 to 6, it can be appreciated that the unlocking block 161 is provided with a third inclined surface 162 at a side close to the piston 120, and the third inclined surface 162 is disposed in cooperation with the first inclined surface 143.

The unlocking piece 161 is abutted against the first inclined surface 143 of the clamping groove 142 by the third inclined surface 162, and the third inclined surface 162 and the first inclined surface 143 are mutually matched, so that damage to the unlocking piece 161 caused by mutual collision with the locking piece 141 can be reduced.

Referring to fig. 4 to 6, it can be appreciated that the unlocking block 161 is provided with a fourth inclined surface 163 at a side remote from the piston 120, and the fourth inclined surface 163 is disposed in cooperation with the second inclined surface 152.

The unlocking piece 161 is abutted against the second inclined surface 152 of the locking groove 142 by the fourth inclined surface 163, and the fourth inclined surface 163 and the second inclined surface 152 are mutually matched, so that damage to the unlocking piece 161 caused by mutual collision with the face gear 150 can be reduced.

Referring to fig. 4 to 6, it can be appreciated that the locking block 141 is provided with a guide slope 144 near the side of the piston 120.

When the unlocking block 161 enters the limiting cylinder 140 from between two adjacent locking blocks 141, the unlocking block 161 can be abutted with the guide inclined plane 144, so that the unlocking block 161 can move along the guide inclined plane 144, the unlocking sleeve 160 rotates, the position of the unlocking block 161 can be limited through the guide inclined plane 144, and the unlocking block 161 can smoothly slide into the limiting sleeve 131 from between two adjacent locking blocks 141; specifically, the fourth inclined surface 163 is provided in cooperation with the guide inclined surface 144, and the unlocking piece 161 can abut against the guide inclined surface 144 via the fourth inclined surface 163.

Referring to fig. 4 to 6, it can be understood that the locking block 141 is provided in plurality and the unlocking block 161 is correspondingly provided in plurality so as to enable the stability of the movement of the unlocking sleeve 160 defined by the locking block 141 to be improved.

Specifically, the plurality of locking blocks 141 are disposed around the inner wall of the limiting cylinder 140 at equal intervals, and correspondingly, the plurality of unlocking blocks 161 are disposed around the outer side wall of the unlocking sleeve 160 at equal intervals.

Referring to fig. 1 and 2, it can be understood that the door closer further includes a mounting base 400, the mounting base 400 is disposed in the cylinder 110 and is located at one side of the piston 120 away from the limiting cylinder 140, the cylinder 110 is provided with a communication port 111, the mounting base 400 is provided with a communication channel 410, and two ends of the communication channel 410 are respectively communicated with the communication port 111 and the cylinder 110.

The size of the space between the piston 120 and the mounting seat 400 can be increased or decreased by moving the piston 120, so that the external gas can pass through the communication channel 410 from the communication port 111 and enter the cylinder 110, or the gas between the piston 120 and the mounting seat 400 can flow out from the communication channel 410 to the outside through the communication port 111, and the flow rate of the gas between the piston 120 and the mounting seat 400 can be controlled by arranging the communication port 111 and the communication channel 410, so that the moving speed of the piston 120 can be slowed down, and the moving speed of the slide bar 130 can be slowed down.

Referring to fig. 1 to 6, a door according to a second aspect of the present utility model includes the door closer according to the first aspect of the present utility model.

By adopting the door closer of the embodiment of the first aspect of the utility model, in the embodiment of the utility model, the slide bar 130 is positioned inside the cylinder 110, one end of the slide bar 130 is fixedly connected with the piston 120, the other end of the slide bar 130 is fixedly connected with the door body, one end of the cylinder 110 is fixedly connected with the door frame, when the door body is opened, the slide bar 130 can move in the cylinder 110 to drive the piston 120 and the unlocking sleeve 160 to move, the unlocking sleeve 160 can move towards the direction approaching the limiting cylinder 140 and enter the limiting cylinder 140, the unlocking block 161 on the unlocking sleeve 160 can pass through between two adjacent locking blocks 141, the face gear 150 is arranged on one side of the locking block 141 away from the piston 120, the unlocking block 161 on the unlocking sleeve 160 is abutted with the second inclined surface 152 of one gear tooth 151 on the face gear 150, the unlocking block 161 slides on the second inclined surface 152 of one gear tooth 151 to rotate the unlocking sleeve 160, after the piston 120 moves towards the direction approaching the limiting cylinder 140, the elastic piece is compressed, so that the elastic piece has an elastic restoring force for pushing the piston 120 to move towards the direction away from the limiting cylinder 140, because the first inclined surface 143 is arranged opposite to the second inclined surface 152 of the two adjacent gear teeth 151, the piston 120 can be pushed by the gas between the piston 120 and the limiting cylinder 140 to move, so that the unlocking sleeve 160 can be driven to move towards the direction approaching the locking block 141, the unlocking block 161 on the unlocking sleeve 160 can be abutted with the first inclined surface 143 of the clamping groove 142 on the locking block 141, so that the unlocking block 161 can slide on the first inclined surface 143, so that the unlocking sleeve 160 rotates, the position of the unlocking sleeve 160 can be regulated, the position of the unlocking sleeve 160 can be limited by the clamping groove 142 on the locking block 141, so that the position of the sliding rod 130 in the cylinder 110 can be limited, thereby the door body can stop rotating and can be kept in an open state; when the door body needs to be closed, the door body needs to be pushed again to drive the unlocking block 161 on the unlocking sleeve 160 to abut against the second inclined surface 152 of the other gear tooth 151 on the face gear 150, so that the unlocking block 161 slides on the second inclined surface 152 of the other gear tooth 151 to rotate the unlocking sleeve 160, thereby adjusting the position of the unlocking sleeve 160 again, and when the elastic piece 300 can push the piston 120 to move to drive the unlocking sleeve 160 to move, the unlocking block 161 of the unlocking sleeve 160 can pass through between two adjacent locking blocks 141 to enable the unlocking sleeve 160 to pass through the limiting cylinder 140, so that the door body is closed; the two limiting sleeves 131 are arranged on the sliding rod 130, the distance between the two limiting sleeves 131 is larger than the length of the unlocking sleeve 160, so that the unlocking sleeve 160 can move between the two limiting sleeves 131, after the unlocking block 161 on the unlocking sleeve 160 is abutted against the second inclined surface 152 on the face gear 150, the sliding rod 130 continues to move so as to drive the unlocking sleeve 160 to move, the unlocking sleeve 160 can move on the sliding rod 130, the speed of the continuous movement of the sliding rod 130 can be reduced through the friction between the unlocking sleeve 160 and the sliding rod 130, the buffering effect is achieved, the possibility that the door collides with a wall body due to overlarge force pushing the door body can be reduced, and the unlocking sleeve 160 moves to be abutted against the limiting sleeve 131 on the sliding rod 130, so that the position of the unlocking sleeve 160 on the sliding rod 130 can be limited through the limiting sleeve 131.

In the description of the present specification, a description of the terms "one embodiment," "some embodiments," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. Door closer, characterized in that includes:

the buffer sleeve comprises a fixing piece, an elastic piece, a cylinder body, a piston, a slide bar, a limiting cylinder, a face gear and an unlocking sleeve; the cylinder body is hollow, the limiting cylinder and the sliding rod are both arranged in the cylinder body, the piston is slidably arranged in the cylinder body and can slide towards the direction close to or far away from the piston, the fixing piece is fixedly arranged in the cylinder body and is fixedly connected with the limiting cylinder, and two ends of the elastic piece are respectively connected with the fixing piece and the piston; the limiting cylinder is arranged in a penetrating manner, a plurality of locking blocks are arranged on the inner wall of the limiting cylinder, and the locking blocks are arranged at intervals around the length direction of the limiting cylinder; the face gear is arranged in the limiting cylinder and is positioned at one side of the locking block away from the piston, and a plurality of gear teeth of the face gear are sequentially arranged around the length direction of the limiting cylinder;

the locking blocks are provided with clamping grooves, the clamping grooves are provided with first inclined planes, the gear teeth are provided with second inclined planes, and the first inclined planes are arranged opposite to the second inclined plane parts of two adjacent gear teeth; the sliding rod is slidably arranged in the limiting cylinder in a penetrating mode, and one end of the sliding rod is connected with the piston; an unlocking block is arranged on the outer side of the unlocking sleeve and is matched with the face gear; be provided with the stop collar on the lateral wall of slide bar, the stop collar is provided with two and follows the length direction interval setting of slide bar, unlocking sleeve slidable and rotationally overlap to locate the slide bar, unlocking sleeve is located two between the stop collar, distance between the stop collar is greater than unlocking sleeve's length.

2. The door closer of claim 1 wherein the resilient member is a spring, the resilient member is sleeved on the sliding rod, and the resilient member is in a compressed state.

3. The door closer of claim 1, wherein the fixing member is provided with a placement groove, the limiting cylinder and the face gear are both arranged in the placement groove, a limiting groove is formed in one end, close to the bottom wall of the placement groove, of the limiting sleeve, and the face gear is arranged in the limiting groove.

4. The door closer of claim 1, wherein a plurality of annular locating grooves are formed in the outer side wall of the sliding rod, and the limiting sleeve is arranged in the annular locating grooves.

5. The door closer of claim 1, wherein a third ramp is provided on a side of the unlocking block adjacent the piston, the third ramp being cooperatively disposed with the first ramp.

6. The door closer of claim 1, wherein a side of the unlocking block remote from the piston is provided with a fourth ramp, the fourth ramp being cooperatively disposed with the second ramp.

7. A door closer according to claim 1, wherein the side of the lock block adjacent the piston is provided with a guide ramp.

8. A door closer according to claim 1, wherein a plurality of lock blocks are provided, and a plurality of unlock blocks are correspondingly provided.

9. The door closer of claim 1, further comprising a mounting seat disposed in the cylinder and located at a side of the piston away from the limiting cylinder, wherein the cylinder is provided with a communication port, the mounting seat is provided with a communication channel, and two ends of the communication channel are respectively communicated with the communication port and the cylinder.

10. A door, comprising:

a door closer as claimed in any one of claims 1 to 9.