A door closer

Abstract

The utility model relates to door closer equipment field discloses a door closer, it includes the casing (1), its characterized in that: the piston cavity is formed in the casing (1), the piston unit (2), gear shaft (3) and compression unit (4) are equipped in the piston cavity, one end of compression unit (4) is connected with piston unit (2), and the other end is connected with the adjusting unit (6), the gear teeth (21) are equipped in piston unit (2), gear shaft (3) engages with gear teeth (21), and piston unit (2) axial movement is made through the rotation of gear shaft (3), the side of casing (1) is provided with a plurality of speed regulating valve holes connected in piston cavity, and the speed regulating valve hole is used for installing speed regulating valve unit (5). The door closer designed in the utility model, the speed regulating valve hole is changed from the side to the front, is convenient for adjusting the door closing speed, and is convenient for the processing of speed regulating valve hole simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of door closer devices, and in particular to a door closer. Background Technology

[0002] A door closer is a hydraulic device similar to a spring on the door. When the door is opened, it can be compressed and then released to automatically close the door, just like a spring door. It can ensure that the door is accurately and promptly closed to the initial position after it is opened. Most of the existing door closers use symmetrical cam designs, and the maximum opening angle is limited to 130 degrees.

[0003] As disclosed in the prior art CN202222156324.7, a door closer is provided, including a door closer body (1), which is fixed to a door leaf. The door closer body (1) includes an outer cover (101) and a cover (102). The cover (102) is located on both sides of the outer cover (101). A housing (103) is provided inside the outer cover (101) and the cover (102). A front cavity (4), a rear cavity (5) and a camshaft (6) are provided inside the housing (103). A front roller (7) is provided in the front cavity (4), and a rear roller (8) is provided in the rear cavity (5). A cam (9) is provided on the camshaft (6). The cam (9) contacts the front roller (7) and the rear roller (8) respectively.

[0004] In the prior art, the speed control valve of the door closer is installed on the side of the door closer, which is inconvenient to adjust; at the same time, there is a risk of oil leakage in the gear shaft hole of the door closer housing. Summary of the Invention

[0005] This utility model addresses the problems in the prior art where the speed control valve of the door closer is installed on the side of the door closer, making it inconvenient to adjust; and the risk of oil leakage from the gear shaft hole of the door closer housing. It provides a new door closer.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method: A door closer includes a housing having a piston chamber formed within the housing; The piston chamber contains a piston unit, a gear shaft, and a compression unit; One end of the compression unit is connected to the piston unit, and the other end is connected to the adjustment unit; The piston unit has teeth inside, and the gear shaft meshes with the teeth. The rotation of the gear shaft causes the piston unit to move axially. Several speed control valve holes connected to the piston cavity are provided on one side of the housing. The speed control valve holes are used to install speed control valve units.

[0007] Preferably, one end of the housing is provided with an end cap hole, and the other end of the housing is provided with an adjustment hole. An end cap is connected to the end cap hole, and the adjustment unit passes through the adjustment hole.

[0008] Preferably, the speed control valve orifice includes a first speed control valve orifice, a second speed control valve orifice, and a third speed control valve orifice; the first speed control valve orifice, the second speed control valve orifice, and the third speed control valve orifice are sequentially arranged on the same side of the housing, with the first speed control valve orifice located between the end cover and the piston, the second speed control valve orifice located on the side of the gear shaft near the end cover, and the third speed control valve orifice located on the side of the compression unit and near the end of the gear shaft; the speed control valve unit includes a first speed control valve, a second speed control valve, and a third speed control valve; the first speed control valve orifice is connected to the first speed control valve, the second speed control valve orifice is connected to the second speed control valve, and the third speed control valve orifice is connected to the third speed control valve.

[0009] Preferably, the third speed control valve is used for buffering when the door opening angle is greater than 75°; the second speed control valve is used to accelerate and increase the locking force when the door closing angle is between 15° and 0°; and the first speed control valve is used to adjust the closing speed when the door closing angle is between 180° and 15°.

[0010] Preferably, the housing has gear shaft holes on the upper and lower sides, through which the gear shaft passes. The gear shaft holes are single-ended and include a first gear shaft hole and a second gear shaft hole. One end of the gear shaft is connected to the first gear shaft hole, and the other end is connected to the second gear shaft hole. A bearing is connected to one end of the second gear shaft hole.

[0011] Preferably, the compression unit includes an inner spring, with an adjustment unit sleeved on one end of the inner spring. An outer spring is fitted outside the inner spring. One end of the outer spring is connected to the adjustment unit, and the other end is fitted onto the piston unit.

[0012] Preferably, the adjustment unit includes an adjustment screw and a force-adjusting ring passing through the adjustment screw. One end of the adjustment screw is fitted with an inner spring, and the other end passes through the mounting hole of the housing; the force-adjusting ring is in contact with the outer spring.

[0013] Preferably, the upper and lower sides of the housing are provided with several mounting holes for installing the door closer.

[0014] This utility model, by adopting the above technical solution, has significant technical effects: The door closer designed in this utility model has its speed control valve hole moved from the side to the front, which facilitates the adjustment of the closing speed and also makes the speed control valve hole easier to process.

[0015] This invention modifies the housing gear shaft hole to a single-ended through-hole, saving the assembly process of one static seal ring and main bearing. This also reduces the risk of oil leakage. Furthermore, the mounting hole design of this invention provides broader compatibility with various market installation sizes.

[0016] This invention replaces the spring hole with a single-ended through-hole, saving the assembly of a static sealing ring and a rear end cap. This reduces the risk of oil leakage.

[0017] This invention uses a forming blade to achieve one-time processing.

[0018] This invention allows for simultaneous adjustment of the inner and outer springs, effectively improving spring lifespan. Simultaneously, the maximum door opening angle can reach 180°. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the door closer structure of this utility model.

[0020] Figure 2 This is a cross-sectional view of the door closer of this utility model.

[0021] Figure 3 This is a three-dimensional view of the door closer of this utility model.

[0022] Figure 4 This is a structural diagram of the interior of the casing of this utility model.

[0023] Figure 5 This is a side view of the casing of this utility model.

[0024] Among them, 1—housing, 2—piston unit, 3—gear shaft, 4—compression unit, 5—speed control valve unit, 6—adjustment unit, 7—end cover, 21—tooth, 31—bearing, 11—end cover hole, 12—adjustment hole, 13—first gear shaft hole, 14—second gear shaft hole, 15—mounting hole, 16—first speed control valve hole, 17—second speed control valve hole, 18—third speed control valve hole, 51—first speed control valve, 52—second speed control valve, 53—third speed control valve, 41—inner spring, 42—outer spring, 61—force adjusting screw, 62—force adjusting ring. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] Example 1 A door closer includes a housing 1, wherein a piston chamber is formed inside the housing 1; The piston chamber is equipped with a piston unit 2, a gear shaft 3, and a compression unit 4; One end of the compression unit 4 is connected to the piston unit 2, and the other end is connected to the adjustment unit 6; Piston unit 2 is provided with teeth 21, and gear shaft 3 meshes with teeth 21. The rotation of gear shaft 3 causes piston unit 2 to move axially. A number of speed control valve holes connected to piston cavity are provided on one side of housing 1. Speed ​​control valve holes are used to install speed control valve unit 5.

[0027] One end of the housing 1 is provided with an end cap hole 11, and the other end of the housing 1 is provided with an adjustment hole 12. The end cap 7 is connected to the end cap hole 11, and the adjustment unit 6 passes through the adjustment hole 12.

[0028] The speed control valve orifice includes a first speed control valve orifice 16, a second speed control valve orifice 17, and a third speed control valve orifice 18; the first speed control valve orifice 16, the second speed control valve orifice 17, and the third speed control valve orifice 18 are sequentially arranged on the same side of the housing 1, with the first speed control valve orifice 16 located between the end cover 7 and the piston, the second speed control valve orifice 17 located on the side of the gear shaft 3 near the end cover 7, and the third speed control valve orifice 18 located on one side of the compression unit 4 and near the end of the gear shaft 3; the speed control valve unit 5 includes a first speed control valve 51, a second speed control valve 52, and a third speed control valve 53; the first speed control valve orifice 16 is connected to the first speed control valve 51, the second speed control valve orifice 17 is connected to the second speed control valve 52, and the third speed control valve orifice 18 is connected to the third speed control valve 53.

[0029] Example 2 A door closer includes a housing 1, wherein a piston chamber is formed inside the housing 1; The piston chamber is equipped with a piston unit 2, a gear shaft 3, and a compression unit 4; One end of the compression unit 4 is connected to the piston unit 2, and the other end is connected to the adjustment unit 6; Piston unit 2 is provided with teeth 21, and gear shaft 3 meshes with teeth 21. The rotation of gear shaft 3 causes piston unit 2 to move axially. A number of speed control valve holes connected to piston cavity are provided on one side of housing 1. Speed ​​control valve holes are used to install speed control valve unit 5.

[0030] One end of the housing 1 is provided with an end cap hole 11, and the other end of the housing 1 is provided with an adjustment hole 12. The end cap 7 is connected to the end cap hole 11, and the adjustment unit 6 passes through the adjustment hole 12.

[0031] The speed control valve orifice includes a first speed control valve orifice 16, a second speed control valve orifice 17, and a third speed control valve orifice 18; the first speed control valve orifice 16, the second speed control valve orifice 17, and the third speed control valve orifice 18 are sequentially arranged on the same side of the housing 1, with the first speed control valve orifice 16 located between the end cover 7 and the piston, the second speed control valve orifice 17 located on the side of the gear shaft 3 near the end cover 7, and the third speed control valve orifice 18 located on one side of the compression unit 4 and near the end of the gear shaft 3; the speed control valve unit 5 includes a first speed control valve 51, a second speed control valve 52, and a third speed control valve 53; the first speed control valve orifice 16 is connected to the first speed control valve 51, the second speed control valve orifice 17 is connected to the second speed control valve 52, and the third speed control valve orifice 18 is connected to the third speed control valve 53.

[0032] The first speed control valve is used to buffer the door when the opening angle is greater than 75°; the second speed control valve is used to slow down the closing speed when the closing angle is between 180° and 15°.

[0033] The housing 1 has gear shaft holes on the upper and lower sides. The gear shaft 3 passes through the gear shaft holes, and the gear shaft holes are single-ended. The gear shaft holes include a first gear shaft hole 13 and a second gear shaft hole 14. One end of the gear shaft 3 is connected to the first gear shaft hole 13, and the other end is connected to the second gear shaft hole 14. A bearing 31 is connected to one end of the second gear shaft hole 14.

[0034] Example 3 A door closer includes a housing 1, wherein a piston chamber is formed inside the housing 1; The piston chamber is equipped with a piston unit 2, a gear shaft 3, and a compression unit 4; One end of the compression unit 4 is connected to the piston unit 2, and the other end is connected to the adjustment unit 6; Piston unit 2 is provided with teeth 21, and gear shaft 3 meshes with teeth 21. The rotation of gear shaft 3 causes piston unit 2 to move axially. A number of speed control valve holes connected to piston cavity are provided on one side of housing 1. Speed ​​control valve holes are used to install speed control valve unit 5.

[0035] One end of the housing 1 is provided with an end cap hole 11, and the other end of the housing 1 is provided with an adjustment hole 12. The end cap 7 is connected to the end cap hole 11, and the adjustment unit 6 passes through the adjustment hole 12.

[0036] The speed control valve orifice includes a first speed control valve orifice 16, a second speed control valve orifice 17, and a third speed control valve orifice 18; the first speed control valve orifice 16, the second speed control valve orifice 17, and the third speed control valve orifice 18 are sequentially arranged on the same side of the housing 1, with the first speed control valve orifice 16 located between the end cover 7 and the piston, the second speed control valve orifice 17 located on the side of the gear shaft 3 near the end cover 7, and the third speed control valve orifice 18 located on one side of the compression unit 4 and near the end of the gear shaft 3; the speed control valve unit 5 includes a first speed control valve 51, a second speed control valve 52, and a third speed control valve 53; the first speed control valve orifice 16 is connected to the first speed control valve 51, the second speed control valve orifice 17 is connected to the second speed control valve 52, and the third speed control valve orifice 18 is connected to the third speed control valve 53.

[0037] The third speed control valve 53 is used for buffering when the door opening angle is greater than 75°; the second speed control valve 52 is used to accelerate and increase the locking force when the door closing angle is 15°~0°; the first speed control valve 51 is used to adjust the closing speed when the door closing angle is 180°~15°.

[0038] The housing 1 has gear shaft holes on the upper and lower sides. The gear shaft 3 passes through the gear shaft holes, and the gear shaft holes are single-ended. The gear shaft holes include a first gear shaft hole 13 and a second gear shaft hole 14. One end of the gear shaft 3 is connected to the first gear shaft hole 13, and the other end is connected to the second gear shaft hole 14. A bearing 31 is connected to one end of the second gear shaft hole 14.

[0039] Compression unit 4 includes an inner spring 41, and an adjustment unit 6 is sleeved on one end of the inner spring 41. An outer spring 42 is fitted outside the inner spring 41. One end of the outer spring 42 is connected to the adjusting unit 6, and the other end is fitted onto the piston unit 2.

[0040] The adjustment unit 6 includes an adjustment screw 61 and a force adjustment ring 62 passing through the adjustment screw 61. One end of the adjustment screw 61 is fitted with an inner spring 41, and the other end passes through the mounting hole 15 of the housing 1. The force adjustment ring 62 is in contact with the outer spring 42.

[0041] Example 4 A door closer includes a housing 1, wherein a piston chamber is formed inside the housing 1; The piston chamber is equipped with a piston unit 2, a gear shaft 3, and a compression unit 4; One end of the compression unit 4 is connected to the piston unit 2, and the other end is connected to the adjustment unit 6; Piston unit 2 is provided with teeth 21, and gear shaft 3 meshes with teeth 21. The rotation of gear shaft 3 causes piston unit 2 to move axially. A number of speed control valve holes connected to piston cavity are provided on one side of housing 1. Speed ​​control valve holes are used to install speed control valve unit 5.

[0042] One end of the housing 1 is provided with an end cap hole 11, and the other end of the housing 1 is provided with an adjustment hole 12. The end cap 7 is connected to the end cap hole 11, and the adjustment unit 6 passes through the adjustment hole 12.

[0043] The speed control valve orifice includes a first speed control valve orifice 16, a second speed control valve orifice 17, and a third speed control valve orifice 18; the first speed control valve orifice 16, the second speed control valve orifice 17, and the third speed control valve orifice 18 are sequentially arranged on the same side of the housing 1, with the first speed control valve orifice 16 located between the end cover 7 and the piston, the second speed control valve orifice 17 located on the side of the gear shaft 3 near the end cover 7, and the third speed control valve orifice 18 located on one side of the compression unit 4 and near the end of the gear shaft 3; the speed control valve unit 5 includes a first speed control valve 51, a second speed control valve 52, and a third speed control valve 53; the first speed control valve orifice 16 is connected to the first speed control valve 51, the second speed control valve orifice 17 is connected to the second speed control valve 52, and the third speed control valve orifice 18 is connected to the third speed control valve 53.

[0044] The third speed control valve 53 is used for buffering when the door opening angle is greater than 75°; the second speed control valve 52 is used to accelerate and increase the locking force when the door closing angle is 15°~0°; the first speed control valve 51 is used to adjust the closing speed when the door closing angle is 180°~15°.

[0045] The housing 1 has gear shaft holes on the upper and lower sides. The gear shaft 3 passes through the gear shaft holes, and the gear shaft holes are single-ended. The gear shaft holes include a first gear shaft hole 13 and a second gear shaft hole 14. One end of the gear shaft 3 is connected to the first gear shaft hole 13, and the other end is connected to the second gear shaft hole 14. A bearing 31 is connected to one end of the second gear shaft hole 14.

[0046] Compression unit 4 includes an inner spring 41, and an adjustment unit 6 is sleeved on one end of the inner spring 41. An outer spring 42 is fitted outside the inner spring 41. One end of the outer spring 42 is connected to the adjusting unit 6, and the other end is fitted onto the piston unit 2.

[0047] The adjustment unit 6 includes an adjustment screw 61 and a force adjustment ring 62 passing through the adjustment screw 61. One end of the adjustment screw 61 is fitted with an inner spring 41, and the other end passes through the mounting hole 15 of the housing 1. The force adjustment ring 62 is in contact with the outer spring 42.

[0048] The housing 1 also has 8 mounting holes 15 on the upper and lower sides for installing the door closer.

Claims

1. A door closer, comprising a housing (1), characterized in that: A piston cavity is formed inside the housing (1); The piston chamber is equipped with a piston unit (2), a gear shaft (3) and a compression unit (4). One end of the compression unit (4) is connected to the piston unit (2), and the other end is connected to the adjustment unit (6). The piston unit (2) is provided with teeth (21), and the gear shaft (3) meshes with the teeth (21). The piston unit (2) moves axially through the rotation of the gear shaft (3). A number of speed control valve holes connected to the piston cavity are provided on one side of the housing (1). The speed control valve holes are used to install the speed control valve unit (5).

2. A door closer according to claim 1, characterized in that, One end of the housing (1) is provided with an end cap hole (11), and the other end of the housing (1) is provided with an adjustment hole (12). The end cap hole (11) is connected to an end cap (7), and the adjustment unit (6) passes through the adjustment hole (12).

3. A door closer according to claim 1, characterized in that, The speed control valve orifice includes a first speed control valve orifice (16), a second speed control valve orifice (17), and a third speed control valve orifice (18); the first speed control valve orifice (16), the second speed control valve orifice (17), and the third speed control valve orifice (18) are sequentially arranged on the same side of the housing (1), and the first speed control valve orifice (16) is located between the end cover (7) and the piston, the second speed control valve orifice (17) is located on the side of the gear shaft (3) near the end cover (7), and the third speed control valve orifice (18) is located on the side of the compression unit (4) and near the end of the gear shaft (3); the speed control valve unit (5) includes a first speed control valve (51), a second speed control valve (52), and a third speed control valve (53); the first speed control valve orifice (16) is connected to the first speed control valve (51), the second speed control valve orifice (17) is connected to the second speed control valve (52), and the third speed control valve orifice (18) is connected to the third speed control valve (53).

4. A door closer according to claim 1, characterized in that, The third speed control valve (53) is used for buffering when the door opening angle is greater than 75°; the second speed control valve (52) is used to accelerate and increase the locking force when the door closing angle is 15°~0°; the first speed control valve (51) is used to adjust the closing speed when the door closing angle is 180°~15°.

5. A door closer according to claim 1, characterized in that, The housing (1) has gear shaft holes on the upper and lower sides. The gear shaft (3) passes through the gear shaft holes, and the gear shaft holes are single-ended. The gear shaft holes include a first gear shaft hole (13) and a second gear shaft hole (14). One end of the gear shaft (3) is connected to the first gear shaft hole (13), and the other end is connected to the second gear shaft hole (14). A bearing (31) is connected to one end of the second gear shaft hole (14).

6. A door closer according to claim 1, characterized in that, The compression unit (4) includes an inner spring (41), and an adjustment unit (6) is sleeved on one end of the inner spring (41). An outer spring (42) is fitted outside the inner spring (41). One end of the outer spring (42) is connected to the adjustment unit (6), and the other end is fitted on the piston unit (2).

7. A door closer according to claim 1, characterized in that, The adjustment unit (6) includes an adjustment screw (61) and a force adjustment ring (62) passing through the adjustment screw (61). One end of the adjustment screw (61) is fitted with an inner spring (41), and the other end passes through the mounting hole (15) of the housing (1). The force adjustment ring (62) is in contact with the outer spring (42).

8. A door closer according to claim 1, characterized in that, The housing (1) is also provided with several mounting holes (15) on the upper and lower sides for the installation of the door closer.

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