JP2015180799A - Floor closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor closer capable of adjusting force for closing a door.SOLUTION: A floor closer includes a main body, a piston, an elastic member, a force adjustment assembly, an end cap and a tail cap. The main body has a storage cavity and a first storage hole, the piston and the elastic member are stored in the storage cavity, one end of the elastic member is abutted to the piston, and the force adjustment assembly includes an adjustment nut, a bevel gear, an adjustment shaft and a force adjustment rod. The adjustment nut, the bevel gear and the adjustment shaft are stored in the storage cavity, one end of the adjustment nut is abutted to the other end of the elastic member on a side opposite from the piston, and the bevel gear is abutted to the other end of the adjustment nut, and one end of the adjustment shaft is inserted into the bevel gear and the adjustment nut. One end of the force adjustment rod is inserted into the first storage hole and leans on the bevel gear, and the other end is extended to the outside of the main body through the first storage hole. The end cap and the tail cap close two open ends of the storage cavity, respectively.

Description

  The present invention relates to a floor closer.

  Glass doors typically use a floor closer (known as a floor spring). It is necessary to embed a cement box in advance. This increases labor and affects the progress of the work. An improved floor closer is a piston-type floor closer. Compared with floor springs, piston-type floor closers do not require a cement box to be embedded beforehand. This is convenient.

  However, this piston-type floor closer has only a stationary force to close the door. The force to close the door cannot be adjusted. The same type of floor closer cannot be applied to glass doors with different specifications. This is a problem for the customer as the choice has to be made.

  Accordingly, the inventors of the present invention have been dedicated to solving these problems based on many years of actual experience.

  The main object of the present invention is to provide a floor closer that can adjust the force to close the door.

  To achieve the foregoing object, the floor closer of the present invention includes a main body, a piston, an elastic member, a force adjustment assembly, an end cap, and a tail cap. The main body has a receiving cavity and a first receiving hole. The receiving cavity has two open ends. The first accommodation hole communicates with the accommodation cavity. The piston is received in the receiving cavity. The elastic member is accommodated in the accommodation cavity. One end of the elastic member is in contact with the piston. The force adjustment assembly includes an adjustment nut, a bevel gear, an adjustment shaft, and a force adjustment rod. The adjustment nut, the bevel gear, and the adjustment shaft are accommodated in the accommodation cavity. One end of the adjustment nut is in contact with the other end of the elastic member opposite to the piston. The bevel gear is in contact with the other end of the adjustment nut on the side opposite to the elastic member. One end of the adjustment shaft is inserted into the bevel gear and the adjustment nut. One end of the force adjustment rod is inserted into the first accommodation hole and leans against the bevel gear. The other end of the force adjustment rod extends out of the main body through the first accommodation hole. The end cap and tail cap are each configured to seal the two open ends of the receiving cavity. One end of the piston opposite to the elastic member is in contact with the tail cap. The other end of the adjustment shaft is in contact with the end cap.

  In one embodiment, the floor closer further comprises a camshaft and roller assembly. The main body further has a second receiving hole. A first through hole, a second through hole, and a third through hole are formed in the central portion of the piston. The first through hole communicates with the second through hole. One end of the roller assembly is accommodated in the first through hole. The other end of the roller assembly is accommodated in the second through hole. The cam shaft is inserted into the third through hole. One end of the cam shaft extends out of the main body through the second accommodation hole. The central portion of the roller assembly is in contact with the cam shaft.

  In one embodiment, the floor closer further comprises a first bearing and a second bearing fitted to the two ends of the camshaft. The first bearing and the second bearing are deep groove ball bearings. Each deep groove ball bearing has an inner annular height that is higher than the outer annular height.

  In one embodiment, the floor closer further comprises a safety valve. A first piston hole is formed at the end of the piston. The safety valve is received in the first piston hole and leans against the tail cap.

  In one embodiment, the floor closer further comprises a base assembly. The base assembly includes an installation base, a connecting shaft, and a stop cover. The installation base is installed on an external support. The installation base has a base receiving groove. The connecting shaft is housed in the base housing groove. The stop cover is disposed on the installation base and covers the connection shaft. A square shaft receiving groove is formed at the center of the connecting shaft. The end of the camshaft extending out of the main body is housed in the square shaft housing groove.

  In one embodiment, the installation base has a plurality of first adjustment holes, a plurality of second adjustment holes, and a plurality of third adjustment holes. The plurality of first adjustment holes support the connection shaft in cooperation with the plurality of fasteners for left and right adjustment of the connection shaft. The plurality of second adjustment holes cooperate with the plurality of fasteners for vertical adjustment of the installation base. The plurality of third adjustment holes support the connection shaft in cooperation with the plurality of fasteners for front-rear adjustment of the connection shaft.

  In one embodiment, the installation base and stop cover are circular.

  In one embodiment, the floor closer further comprises a closed door valve and a speed regulating valve disposed on the body. An oil passage, a first oil hole, and a second oil hole are formed in the main body. The first end of the closing door valve and the speed regulating valve is located inside the body. The second end of the closing door valve and the speed control valve extends out of the body. The oil passage, the first oil hole, and the speed control valve form a first hydraulic oil passage. The oil passage, the second oil hole, and the closing door valve form a second hydraulic oil passage.

  In one embodiment, the closed door valve and the second end of the speed regulating valve extending out of the body are perpendicular to the extending direction of the receiving cavity.

  In one embodiment, the floor closer further comprises a first outer cover and a second outer cover. The first outer cover and the second outer cover are detachably disposed on two opposing sides of the main body.

  When the force adjusting assembly turns the force adjusting rod of the floor closer clockwise, the force adjusting rod rotates the bevel gear, the bevel gear rotates the adjusting shaft, and then the adjusting nut moves by the adjusting shaft to compress the elastic member. This increases the force to close the door. When the force adjustment rod is turned counterclockwise, the force adjustment rod rotates the bevel gear, the bevel gear rotates the adjustment shaft, and then the adjustment nut moves by the adjustment shaft to release the elastic member, thereby closing the door Power is reduced. In this way, the force for closing the door can be adjusted.

1 is an exploded view of a floor closer according to an embodiment of the present invention. It is an exploded view which shows the outer side part of the main body of the floor closer of FIG. It is sectional drawing along the III-III line of FIG. FIG. 4 is an enlarged view of FIG. 3. It is the schematic which shows the installation base and connection axis | shaft of the floor closer of FIG. FIG. 2 is a schematic diagram showing the floor closer of FIG. 1 in use. It is sectional drawing which shows the main body of the floor closer of FIG. 1 seen from another angle. It is a schematic diagram showing an oil passage. It is a schematic diagram showing an oil passage.

  Embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings.

  1 and 2, a floor closer 200 according to an embodiment of the present invention includes a main body 10, a piston 20, an elastic member 30, a force adjustment assembly 40, an end cap 50, and a tail cap 60.

  The main body 10 is substantially rectangular. The main body 10 is formed by extrusion molding and is easily manufactured.

  The main body 10 has an accommodation cavity 12 and a first accommodation hole 14. The housing cavity 12 extends in the longitudinal direction from one end of the main body 10 to the other end of the main body 10. The receiving cavity 12 has two open ends located on the two end faces of the main body 10. The first accommodation hole 14 is disposed on the side wall of the main body 10. The first accommodation hole 14 communicates with the accommodation cavity. The extending direction of the first receiving hole 14 is perpendicular to the extending direction of the receiving cavity 12. The main body 10 has an accommodation groove 16 extending in the longitudinal direction from one end of the main body 10 to the other end of the main body 10. The receiving cavity 12 and the receiving groove 16 are parallel.

  The main body 10 further has a second accommodation hole (not shown). The second accommodation hole is arranged on the side of the main body 10 opposite to the accommodation groove 16. The second accommodation hole communicates with the accommodation cavity 12. The extending direction of the second receiving hole is perpendicular to the extending direction of the receiving cavity 12. The extending direction of the second receiving hole is perpendicular to the extending direction of the first receiving hole 14.

  Referring to FIGS. 2 and 3, the piston 20 is housed in the housing cavity 12. The piston 20 is substantially cylindrical. The piston 20 includes a first piston wall 21, a second piston wall 22, a first piston head 23, and a second piston head 24. The two end portions of the first piston wall 21 are connected to the first piston head 23 and the second piston head 24, respectively. One end of the second piston wall 22 is connected to the second piston head 24. A first gap (not numbered in the figure) is defined between the other end of the second piston wall 22 and the first piston head 23. A second gap (not numbered in the figure) is defined between the first piston wall 21 and the second piston wall 22.

  A first through hole (not numbered in the figure) is formed in the first piston wall 21. A second through hole (not numbered in the figure) is formed in the second piston wall 22. The first through hole and the second through hole are coaxial. The first through hole and the second through hole face each other and communicate with each other. A third through hole is further formed in the first piston wall 21. The third through hole faces the first gap.

  A first piston hole 232 is formed in the first piston head 23. A second piston hole (not numbered in the figure) is formed in the second piston head 24. The first piston hole 232 communicates with the first gap and the second gap.

  The elastic member 30 is housed in the housing cavity 12. One end of the elastic member 30 is in contact with the second piston head 24. In this embodiment, the elastic member 30 is a spiral spring. It will be appreciated that in other embodiments, the elastic member 30 may have other shapes.

  2 and 4, the force adjustment assembly 40 includes an adjustment nut 41, a bevel gear 42, an adjustment shaft 43, and a force adjustment rod 44. The adjustment nut 41, the bevel gear 42, and the adjustment shaft 43 are accommodated in the accommodation cavity 12. One end of the adjustment nut 41 is in contact with the other end of the elastic member 30 opposite to the piston 20. The bevel gear 42 is in contact with the other end of the adjustment nut 41 on the side opposite to the elastic member 30. One end of the adjustment shaft 43 is inserted into the bevel gear 42 and the adjustment nut 41. One end of the force adjustment rod 44 is inserted into the first accommodation hole 14 and leans against the bevel gear 42. The other end of the force adjusting rod 44 extends out of the main body 10 through the first receiving hole 14 and is perpendicular to the side wall of the main body 10 outside the main body 10, that is, in the extending direction of the receiving cavity 12. It is located perpendicular to it.

  The end cap 50 and the tail cap 60 are respectively disposed at the two ends of the main body 10 to seal the two open ends of the receiving cavity 12. Preferably, to ensure this sealing function, the present invention further includes an end cap sealing ring 52 fitted to the end cap 50 and a tail cap sealing ring 62 fitted to the tail cap 60.

  The other end of the piston 20 opposite to the elastic member 30 is in contact with the tail cap 60. The other end of the adjustment shaft 43 is in contact with the end cap 50.

  When the force adjusting rod 40 of the floor closer 200 is rotated clockwise by the force adjusting assembly 40, the force adjusting rod 44 rotates the bevel gear 42, the bevel gear 42 rotates the adjusting shaft 43, and then adjusts by the adjusting shaft 43. The nut 41 moves and compresses the elastic member 30, thereby increasing the force to close the door. When the force adjusting rod 44 is rotated counterclockwise, the force adjusting rod 44 rotates the bevel gear 42, the bevel gear 42 rotates the adjusting shaft 43, and then the adjusting nut 43 is moved by the adjusting shaft 43 to move the elastic member 30. Release, thereby reducing the force to close the door. In this way, the door closing force can be adjusted, and the same type of floor closer can be applied to glass doors of different specifications. The customer does not have to worry about which type of floor closer.

  Preferably, the floor closer 200 further includes a safety valve 70. The safety valve 70 is accommodated in the first piston hole 232 and leans against the tail cap 60.

  Referring to FIG. 2, the floor closer 200 preferably further includes a camshaft 80, a first bearing 90, a second bearing 100, and a roller assembly 110.

  The cam shaft 80 includes a first connection 81, a cam disk 82, a second connection shaft 83, and a square shaft 84, which are connected in series. In this case, the cam disk 82 is an involute cam disk. Referring to FIG. 3, a part of the cam shaft 80 is housed in the housing cavity 12, and the angular shaft 84 of the cam shaft 80 extends outwardly through the second housing hole of the main body 10 to the outside of the main body 10. positioned. Preferably, the floor closer 200 further includes a sealing cover 120 to ensure a sealing function. The sealing cover 120 is configured to seal the second accommodation hole. A through hole is formed in the central portion of the sealing cover 120. The square shaft 84 extends out of the sealing cover 120 through this through hole. The first bearing 90 is fitted on the first connection shaft 81. The second bearing 100 is fitted on the second connection shaft 83. In order to ensure the sealing function, the second bearing 100 and the sealing cover 120 are provided with sealing rings (not numbered in the figure).

  Preferably, the first bearing 90 and the second bearing 100 are deep groove ball bearings. Each deep groove ball bearing has an inner annular height higher than the outer annular height. In a typical deep groove ball bearing, the inner annular height is equal to the outer annular height.

  Conventional floor closers use needle bearings. Since the needle bearing cannot withstand the axial force, it is necessary to support the axial force applied by the door to the camshaft 80 by disposing a spacer in the lower portion. Since the cam shaft 80 and the spacer have a flat contact portion, large friction is generated during rotation. This affects the smooth opening and closing of the door. Once significant wear and breakage of the spacer occurs, the needle bearing is damaged and the useful life of the product is shortened. The present invention withstands axial forces using a deep groove ball bearing with an inner annular height higher than the outer annular height, thus improving door friction and smoothing the opening and closing of the door. Can be extended.

  The central portion of the roller assembly 110 is located in the second gap of the piston 20. One end of the roller assembly 110 is accommodated in the first through hole, and the other end of the roller assembly 110 is accommodated in the second through hole. The outer wall at the center of the roller assembly 110 is in contact with the outer wall of the cam disk 82.

  Referring to FIG. 1, the floor closer 200 further includes a base assembly 130. The base assembly 130 includes an installation base 131, a connection shaft 132, and a stop cover 133. The base assembly 130 further includes an expansion screw 134, a fixing screw 135, a first adjustment screw 136, and a second adjustment screw 137.

  Referring to FIG. 5, the installation base 131 is circular. The central portion of the installation base 131 has a base receiving groove (not numbered in the figure). The connecting shaft 132 is housed in the base housing groove. Four installation holes 1311 are formed in the installation base 131. The four installation holes 1311 are located around the base accommodation groove. The installation base 131 further includes four first adjustment holes 1312, four second adjustment holes 1313, and two third adjustment holes 1314. The four first adjustment holes 1312 and the four second adjustment holes 1313 are located around the base accommodation groove. The two third adjustment holes 1314 are respectively located on both sides of the base accommodation groove.

  In the center portion of the connecting shaft 132, a square shaft accommodating groove 1321 is formed.

  The installation base 131, the connecting shaft 132, and the stop cover 133 are all made of 304 type stainless steel.

  1 and 6, in order to install the floor closer 200, four holes are drilled in an external support such as a floor, four expansion screws 134 are inserted into these four holes, and then The installation base 131 is installed on the floor by fastening and fixing the four fixing screws 135.

  The connecting shaft 132 is placed in the base housing groove, and then one end of the glass door 300 is placed in the housing groove 16 of the main body 10. A press plate 141 and two spacers 142 are placed in the receiving groove 16. The press plate 141, one spacer 142, the glass door 300, and the other spacer 142 are arranged in order. The other end of the glass door 300 is fixed with a door clip 400. One end of the cam shaft 80 extends out of the sealing cap 120. That is, one end of the angular shaft 84 of the cam shaft 80 opposite to the second connecting shaft 83 is accommodated in the angular shaft accommodating groove 1321 of the connecting shaft 132. The four first adjustment screws 136 are inserted into the four first adjustment holes 1312 and fixed. The four second adjustment screws 137 are inserted into the four second adjustment holes 1313 and fixed. Two first adjustment screws 136 are inserted and fixed in the two third adjustment holes 1314, respectively. Thereafter, the stop cover 133 is disposed on the installation base 131 to cover the connection shaft 132, and the installation of the floor closer 200 is completed.

  In order to use the floor closer 200, it is not necessary to embed a cement box in the floor beforehand. The floor closer 200 can be installed directly and is used conveniently, reducing labor and speeding up the work. Since the floor closer 200 is smaller than the floor spring, it is easy to use. If the base assembly 130 needs to be hidden, a corresponding receiving groove for receiving the base assembly 130 may be provided on the floor. There is no need to fill the cement and it can be easily functioned.

  Preferably, the installation base 131 and the stop cover 133 are circular. It looks good as it is circular and does not hit and damage the cleaning tool during cleaning.

  The connection shaft 132 of the base assembly 130 is received in the base receiving groove of the installation base 131, and the six first adjustment screws 136 cooperate with the four first adjustment holes 1312 and the two third adjustment holes 1314. Thus, the position of the connection shaft 132 with respect to the installation base 131 is adjusted, and the connection shaft 132 is fixed on the installation base 131. In this case, the four first adjustment holes 1312 cooperate with four of the first adjustment screws 136 to adjust the left and right of the connection shaft 132. The two third adjustment holes 1314 cooperate with two of the first adjustment screws 136 to perform front-rear adjustment of the connecting shaft 132. The four second adjustment holes 1313 cooperate with the four second adjustment screws 137 to adjust the installation base 131 up and down.

  Since one end of the square shaft 84 is accommodated in the connection shaft 132, and the connection shaft 132 is accommodated in the base accommodation groove portion of the installation base 131, the vertical adjustment of the installation base 131, the adjustment of the front and rear of the connection shaft 132, and the left and right When the adjustment is made, the vertical axis 84 is also adjusted up and down, front and rear, and left and right. As a result, the deviation in installation can be offset and the required standard for installation can be lowered, which is very convenient for installation.

  It is understood that the number of first adjustment holes 1312 is not limited to four, the number of second adjustment holes 1313 is not limited to four, and the number of third adjustment holes 1314 is not limited to two. Like. This number can be adjusted according to the sizes of the installation base 131 and the connecting shaft 132. The fasteners that cooperate with the first adjustment hole 1312, the second adjustment hole 1313, and the third adjustment hole 1314 are not limited to the first adjustment screw 136 and the second adjustment screw 137, but are bolts, pressers. A screw or the like is also possible.

  Preferably, referring to FIG. 2, the floor closer 200 further includes a closing door valve 150 and a speed control valve 160.

  Referring to FIG. 7, the main body 10 is provided with an oil passage 170, a first oil hole 171, and a second oil hole 172. Both the closing door valve 150 and the speed control valve 160 are arranged in the main body 10. The first ends of the closing door valve 150 and the speed control valve 160 are located inside the main body 10, and the second ends of the closing door valve 150 and the speed control valve 160 extend out of the main body 10. Perpendicular to the side wall of the receiving cavity, that is, to the extending direction of the receiving cavity 12. The second end extending out of the main body 10 is an adjustment end. The oil passage 170, the first oil hole 171 and the speed control valve 160 form a first hydraulic oil passage. Oil passage 170, second oil hole 172, and closing door valve 150 form a second hydraulic oil passage.

  Referring to FIG. 3, when the door is opened, the cam shaft 80 of the floor closer 200 is fixed and the other parts rotate with the door. When the cam shaft 80 is fixed, the roller assembly 110 leaning against the outer wall of the cam disk 82 moves relatively on the curved surface of the cam disk 82. This is because the cam disk 82 is designed involute. As the radius gradually increases, the roller assembly 110 moves away from the axis of the cam disk 82. The piston 20 is pushed and approaches the elastic member 30 to compress the elastic member 30 and increase the stored energy of the spring. The hydraulic oil at the rear end of the elastic member 30 passes through the safety valve 70 on the piston 20 and flows to the tail cap 60. When the door is closed, the stored energy of the elastic member 30 of the floor closer 200 is released. As the piston 20 is pushed away from the elastic member 30, the roller assembly 110 moves on the involute cam disk 82 and slowly approaches the axis of the cam disk 82, ie, rotates about the axis of the cam disk 82, thereby The door closes.

  The front end of the piston of a normal piston type floor closer uses a hard sphere as a one-way oil seal. If the door is forcibly closed, the internal components will be damaged. A safety valve 70 is provided at the front end of the piston 20 of the present invention. If the door is forcibly closed, the safety valve 70 releases the pressure to protect the internal components. This has the advantage that the service life of the floor closer 200 is extended.

  When the door is closed normally, the oil in the chamber between the safety valve 70 and the tail cap 60 is transferred to the oil passage 170, the first oil hole 171, the second oil hole 172, the closed door valve 150, And flows through the second control valve 160 to the chamber on one side of the elastic member 30. The speed at which the door is closed is adjusted and controlled by the flow rate through the first oil hole 171 and the second oil hole 172. Specifically, referring to FIG. 8, when the door is closed from 90 degrees, oil flows in from the first oil hole 171 and flows out of the speed control valve 160. The speed control valve 160 is configured to control the flow rate so as to control the speed of closing the door. At this time, the piston 20 closes the second oil hole 172, and the hydraulic oil passes through the first hydraulic oil passage. Referring to FIG. 9, when the piston 20 moves further and closes the first oil hole 171, the second oil hole 172 is not closed. Oil flows from the closed door valve 150 and flows out from the second oil hole 172. The closing door valve 150 controls the flow rate and the hydraulic oil controls the speed at which the door closes through the second hydraulic passage.

  The portions of the closing door valve 150 and the speed control valve 160 that extend out of the main body 10 are located on the side surface of the main body 10 and are perpendicular to the side wall of the main body 10, that is, perpendicular to the extending direction of the receiving cavity 12. is there. Since they are arranged perpendicular to the door, they provide a large space during adjustment and are convenient for operation.

  Referring to FIG. 1, the floor closer 200 further includes a first outer cover 180 and a second outer cover 190. The first outer cover 180 and the second outer cover 190 are detachably disposed on both sides of the main body 10. Specifically, the first outer cover 180 and the second outer cover 190 are detachably disposed on both sides of the main body 10 by fasteners.

  At the time of installation, after the base assembly 130 is installed on the floor, the main body 10 is installed on the base assembly 130, and the glass door 300 is fixed in the receiving groove 16. Thereafter, the first outer cover 180 and the second outer cover 190 are respectively installed on the two opposite sides of the main body 10.

  The first outer cover 180 and the second outer cover 190 are configured to protect the main body 10, the piston 20, and other components in order to extend the useful life of the floor closer 200.

  Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and extensions may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not limited except as by the appended claims.

200 Floor closer 10 Main body 20 Piston 30 Elastic member 40 Force adjustment assembly 50 End cap 60 Tail cap 80 Cam shaft 90 First bearing 100 Second bearing 110 Roller assembly 130 Base assembly 131 Installation base 132 Connection shaft 133 Stop cover 136 1 adjustment screw 137 2nd adjustment screw

Claims (10)

A main body having a receiving cavity and a first receiving hole, wherein the receiving cavity has two open ends, and the first receiving hole communicates with the receiving cavity;
A piston housed in the housing cavity;
An elastic member housed in the housing cavity and having one end in contact with the piston;
A force adjusting assembly comprising an adjusting nut, a bevel gear, an adjusting shaft and a force adjusting rod, wherein the adjusting nut, the bevel gear and the adjusting shaft are received in the receiving cavity, and one end of the adjusting nut is opposite to the piston The other end of the elastic member, the bevel gear contacts the other end of the adjustment nut opposite to the elastic member, one end of the adjustment shaft is inserted into the bevel gear and the adjustment nut, and the force A force adjusting assembly in which one end of an adjusting rod is inserted into the first receiving hole and leans against the bevel gear, and the other end of the force adjusting rod extends out of the main body through the first receiving hole When,
An end cap and a tail cap configured to respectively seal the two open ends of the receiving cavity, wherein one end of the piston opposite to the elastic member abuts the tail cap; An end cap and a tail cap in which the other end of the adjustment shaft is in contact with the end cap;
A floor closer.   A cam shaft and a roller assembly, wherein the main body further includes a second receiving hole, and a first through hole, a second through hole, and a third through hole are formed in a central portion of the piston; The first through hole communicates with the second through hole, one end of the roller assembly is accommodated in the first through hole, the other end of the roller assembly is accommodated in the second through hole, A camshaft is inserted into the third through hole, one end of the camshaft extends out of the main body through the second receiving hole, and a central portion of the roller assembly is in contact with the camshaft. The floor closer according to claim 1.   A first bearing and a second bearing fitted on two ends of the cam shaft are further provided, the first bearing and the second bearing being deep groove ball bearings, and the deep groove ball bearing being The floor closer according to claim 2, each having an inner annular height that is higher than the outer annular height.   3. The safety valve according to claim 2, further comprising a safety valve, wherein a first piston hole is formed at the end of the piston, the safety valve being received in the first piston hole and leaning against the tail cap. Floor closer.   A base assembly, the base assembly including an installation base, a connection shaft, and a stop cover; the installation base is installed on an external support; the installation base includes a base receiving groove; It is accommodated in a base accommodation groove, the stop cover is disposed on the installation base and covers the connection shaft, an angular shaft accommodation groove is formed in the center of the connection shaft, and extends out of the main body. The floor closer according to claim 2, wherein the end portion of the cam shaft is accommodated in the angular shaft accommodating groove.   A plurality of first adjustment holes, a plurality of second adjustment holes, and a plurality of third adjustment holes are formed in the installation base, and the plurality of first adjustment holes are for adjusting the left and right of the connection shaft. The plurality of second adjustment holes cooperate with the plurality of fasteners for vertical adjustment of the installation base, and the plurality of third adjustment holes support the connection shaft in cooperation with the plurality of fasteners. The floor closer according to claim 5, wherein the adjustment hole supports the connection shaft in cooperation with a plurality of fasteners for front-rear adjustment of the connection shaft.   The floor closer according to claim 5, wherein the installation base and the stop cover are circular.   The main body further includes a closed door valve and a speed control valve, and an oil passage, a first oil hole, and a second oil hole are formed in the main body. One end is located inside the body, the second end of the closing door valve and the speed regulating valve extends out of the body, the oil passage, the first oil hole and the speed. The floor closer according to claim 1, wherein the regulating valve forms a first hydraulic oil passage, and the oil passage, the second oil hole, and the closing door valve form a second hydraulic oil passage.   The floor closer according to claim 8, wherein the closing door valve extending out of the main body and the second end of the speed control valve are perpendicular to an extending direction of the receiving cavity.   2. The apparatus according to claim 1, further comprising a first outer cover and a second outer cover, wherein the first outer cover and the second outer cover are detachably disposed on two opposing sides of the main body. Floor closer.

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