Arbitrarily rotatable and reset hydraulic door closer

Abstract

The present invention discloses an oil pressure door closer capable of arbitrary rotation and reset, which includes a housing, a transmission shaft, a piston, a roller assembly, a movable valve, a first spring group and a second spring group. A cam portion and a protruding portion are provided on the transmission shaft. The roller assembly abuts against the cam portion, and the movable valve abuts against the protruding portion. The roller assembly is rotatably mounted on the piston. The piston is connected to the first spring group, the first spring group is connected to the housing, the movable valve is connected to the second spring group, and the second spring group is connected to the housing. In the present invention, the roller assembly can always abut against the cam portion of the transmission shaft and correspondingly change its position on the cam portion to adapt to the rotation of the door body, so as to realize the arbitrary rotation of the door body. At the same time, the movable valve can always abut against the protruding portion of the transmission shaft to avoid gaps between the movable valve and the transmission shaft, continuously apply force to the transmission shaft, and effectively reduce the inertial rotation of the door body.

Description

Technical Field

[0001] The present invention relates to the field of door closer design, and particularly to an oil pressure door closer capable of arbitrarily rotating and resetting. Background Art

[0002] Previously, for common doors, after being opened, it was often necessary to manually close them specifically. Moreover, when in use, the door was easily affected by external forces such as wind and could not maintain its open or closed state. To solve these problems, many doors are now equipped with door closers. On the one hand, it has the function of keeping the door in an open or closed state, reducing the influence of external forces on the door. On the other hand, it can make the door return to its closed state after being opened, that is, it has a reset function.

[0003] However, the doors equipped with common door closers usually only allow rotation of about 90°, and a few can allow rotation of about 180°. Rotation exceeding 180° is usually impossible to achieve with conventional door closers, which reduces the applicable scenarios of the doors equipped with door closers and lowers their versatility.

[0004] Furthermore, when people casually close the door, even when the door is reset, people usually do not continuously apply external force to the door. Due to its own weight, the door often has a large inertia, which easily causes the door to continue to rotate to a certain extent after rotating to the closed position, having a certain potential safety hazard. Common door closers usually cannot solve this problem that occurs when the door is reset. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an oil pressure door closer capable of arbitrarily rotating and resetting, which can solve one or more of the above problems.

[0006] According to one aspect of the present invention, there is provided an oil pressure door closer capable of arbitrarily rotating and resetting, including a housing, a transmission shaft, a piston, a roller assembly, a movable valve, a first spring group, and a second spring group. A cam portion and a protruding portion are provided on the transmission shaft. The roller assembly abuts against the cam portion, and the movable valve abuts against the protruding portion. The roller assembly is rotatably mounted on the piston. The piston is connected to the first spring group, the first spring group is connected to the housing, the movable valve is connected to the second spring group, and the second spring group is connected to the housing.

[0007] The beneficial effects of the present invention are as follows: In the present invention, the door body of the door can be installed on the housing, so that the housing can rotate with the rotation of the door body. The housing can also be connected to an external hydraulic system, so that the external hydraulic system can supply oil to the housing. When the housing rotates, under the action of the first spring group, the roller assembly can always abut against the cam portion of the transmission shaft and correspondingly change its position on the cam portion to adapt to the rotation of the door body, thereby timely changing the distribution of the hydraulic oil inside the housing, enabling the distribution of the hydraulic oil in the housing to adapt to different rotation angles of the door body, so as to achieve the arbitrary rotation of the door body. At the same time, under the action of the second spring group, the movable valve can always abut against the protruding portion of the transmission shaft, thereby preventing a gap from appearing between the movable valve and the transmission shaft during the rotation of the housing, continuously applying force to the transmission shaft, and effectively reducing the inertial rotation of the door body, that is, effectively improving the reset safety of the door body. In addition, when the local hydraulic oil pressure inside the housing is relatively large, the movable valve can also play a pressure relief role, further improving the use reliability of the present invention.

[0008] In some embodiments, the movable valve includes a valve core, a valve core spring, a locking pin, an inner valve body, and an outer valve body. The piston is sleeved on the outer valve body. The outer valve body is installed on the inner valve body. The locking pin is installed on the inner valve body. One end of the valve core spring is connected to the locking pin, and the other end is connected to the valve core. The outer valve body abuts against the protruding portion, and the second spring group is connected to the outer valve body. Thus, the outer valve body can always abut against the transmission shaft under the action of the second spring group, and the valve core can be opened when the pressure on the side where it is not connected to the valve core spring is relatively large to play a pressure relief role.

[0009] In some embodiments, the movable valve includes a guiding rod. The guiding rod is connected to the outer valve body and is in contact with the transmission shaft. The guiding rod can limit the outer valve body to prevent the outer valve body from tilting excessively relative to the transmission shaft when the housing rotates, so as to ensure the normal operation of the movable valve.

[0010] In some embodiments, the roller assembly includes a roller, a needle roller, and a fixing pin. The fixing pin is installed in the piston. The needle roller is sleeved on the fixing pin. The roller is sleeved on the needle roller. The roller abuts against the cam portion. Thus, the roller can rotate on the fixing pin, and the needle roller can effectively reduce the friction influence when the roller rotates.

[0011] In some embodiments, the housing includes a housing main body, a first cover, a second cover, and a shaft sleeve. The first cover is connected to one end of the housing main body. The second cover is connected to the other end of the housing main body. The shaft sleeve is installed on the housing main body and is sleeved on the transmission shaft.

[0012] In some embodiments, the first spring group includes a first spring and a second spring. One end of both the first spring and the second spring is connected to the piston, and the other end is connected to the housing. The first spring is sleeved on the second spring. The arrangement of the first spring and the second spring can, on the one hand, equalize the force on the piston. On the other hand, when any one of the springs fails, the other spring can still work normally, thereby ensuring the reliability of the use of the first spring group.

[0013] In some embodiments, the second spring group includes a third spring and a fourth spring. One end of both the third spring and the fourth spring is connected to the movable valve, and the other end is connected to the housing. The third spring is sleeved on the fourth spring. The arrangement of the third spring and the fourth spring can, on the one hand, equalize the force on the piston. On the other hand, when any one of the springs fails, the other spring can still work normally, thereby ensuring the reliability of the use of the second spring group.

[0014] In some embodiments, the present invention further includes a base, and the transmission shaft is installed on the base. The setting of the base can facilitate the fixation of the transmission shaft.

[0015] In some embodiments, the piston partitions a first oil passage and a second oil passage in the housing. A third oil passage communicating with the first oil passage is provided in the piston, and the movable valve is used to control the communication between the second oil passage and the third oil passage. Thus, when the pressure in the second oil passage is relatively high, the movable valve can be opened to realize the communication between the second oil passage and the third oil passage, so as to drain the oil in the second oil passage, thereby avoiding damage to the structure caused by too high pressure in the second oil passage. Description of the Drawings

[0016] Figure 1 is an exploded view of a structural schematic diagram of a rotatable and resetable oil-pressure door closer according to an embodiment of the present invention.

[0017] Figure 2 is Figure 1 a cross-sectional view of a front view of the rotatable and resetable oil-pressure door closer in

[0018] Figure 3 is Figure 2 an enlarged view of part A of the rotatable and resetable oil-pressure door closer in

[0019] Figure 4 is Figure 1 a cross-sectional view of a top view of the rotatable and resetable oil-pressure door closer in

[0020] Figure 5 is Figure 1 a schematic diagram of the use of the rotatable and resetable oil-pressure door closer in Detailed Embodiments

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , a rotatable and resetable oil-pressure door closer of the present invention includes a housing 1, a transmission shaft 2, a piston 3, a roller assembly 4, a movable valve 5, a first spring group 6 and a second spring group 7.

[0023] The housing 1 includes a housing main body 11, a first cover 12, a second cover 13 and a bushing 14. One end of the first cover 12 and the housing main body 11 are fixedly connected by thread fitting, the other end of the second cover 13 and the housing main body 11 are fixedly connected by thread fitting, and the bushing 14 is fixedly installed on the housing main body 11 by thread fitting. In addition, O-rings can be installed between the first cover 12 and the housing main body, between the second cover 13 and the housing main body, and between the bushing 14 and the housing main body as needed to improve the sealing performance at the above positions.

[0024] The transmission shaft 2 includes a transmission shaft main body 201, a gasket 202, a first needle roller bearing 203 and a second needle roller bearing 204. The first needle roller bearing 203 is sleeved on the transmission shaft main body 201 and is embedded in the housing main body 11, so that one end of the transmission shaft main body 201 is embedded in the housing main body 11, and a gasket 203 is provided between the top of the transmission shaft main body 201 and the housing main body 11. The other end of the transmission shaft main body 201 passes through the piston 3 and the housing main body 11 in sequence and then exposes. The second needle roller bearing 204 is also sleeved on the transmission shaft main body 201 and is also embedded in the bushing 14, that is, the bushing 14 is sleeved on the transmission shaft main body 201 through the second needle roller bearing 204.

[0025] The transmission shaft main body 201 of the transmission shaft 2 is provided with a cam portion 21 and a protruding portion 22. The cam portion 21 is provided with two symmetrically arranged concave positions and two symmetrically arranged convex positions, and the protruding portion 22 has two places, which are symmetrically located on both sides of the cam portion 21 respectively.

[0026] The roller assembly 4 includes a roller 41, a needle 42, a fixing pin 43, a first roller gasket 44 and a second roller gasket 45. The fixing pin 43 is fixedly embedded in the piston 3, the needle 42 is sleeved on the fixing pin 43, and the roller 41 is sleeved on the needle 42. The roller 41 can rotate on the needle 42, so that the roller 41 is rotatably installed on the piston 3, and the first roller gasket 44 and the second roller gasket 45 are respectively padded between the top and the bottom of the roller 41 and the piston 3.

[0027] The movable valve 5 includes a valve core 51, a valve core spring 52, a locking pin 53, an inner valve body 54, and an outer valve body 55. A part of the piston 3 is sleeved on the outer valve body 55, a part of the outer valve body 55 is sleeved on the inner valve body 54, the locking pin 53 is fixedly installed on the inner valve body 54, one end of the valve core spring 52 is fixedly connected to the locking pin 53, and the other end of the valve core spring 52 is sleeved on the valve core 51 to be fixedly connected to the valve core 51. When the valve core 51 abuts against the inner valve body 54, the movable valve 5 is closed, and when the valve core 51 is separated from the inner valve body 54, the movable valve 5 is opened.

[0028] The piston 3, the roller assembly 4, the movable valve 5, the first spring group 6, and the second spring group 7 are all located inside the housing body 11 of the housing 1.

[0029] The first spring group 6 includes a first spring 61 and a second spring 62. Both the first spring 61 and the second spring 62 are connected to the piston 3 in contact at one end and connected to the first cover 12 of the housing 1 in contact at the other end. The cross-sectional diameter of the first spring 61 is larger than that of the second spring 62. The first spring 61 is sleeved on the second spring 62, and the first spring 61 and the second spring 62 are arranged in parallel. And under the action of the first spring group 6, the roller assembly 4 abuts against the cam portion 21 on the transmission shaft 2.

[0030] The second spring group 7 includes a third spring 71 and a fourth spring 72. Both the third spring 71 and the fourth spring 72 are connected to the inner valve body 54 of the movable valve 5 in contact at one end and connected to the second cover 13 of the housing 1 in contact at the other end. The cross-sectional diameter of the third spring 71 is larger than that of the fourth spring 72. The third spring 71 is sleeved on the fourth spring 72, and the third spring 71 and the fourth spring 72 are arranged in parallel. And under the action of the second spring group 7, the outer valve body 55 on the movable valve 5 abuts against the protruding portion 22 of the transmission shaft 2.

[0031] The movable valve 5 further includes a guiding rod 56. There can be multiple guiding rods 56. All the guiding rods 56 are fixedly connected to the outer valve body 55, and the guiding rods 56 are arranged in parallel with each other. The guiding rods 56 are in contact with the side of the transmission shaft 2, so that the multiple guiding rods 56 can be distributed on the side of the transmission shaft 2 in a slightly clamping manner to reduce the inclination between the transmission shaft 2 and the outer valve body 55.

[0032] The piston 3 separates a first oil passage 10 and a second oil passage 20 inside the housing 1. A third oil passage 30 is provided inside the piston 3. The third oil passage 30 is communicated with the first oil passage 10. When the movable valve 5 is closed, the second oil passage 20 and the third oil passage 30 are not communicated. When the movable valve 5 is opened, the second oil passage 20 and the third oil passage 30 can be communicated through the movable valve 5.

[0033] The present invention further includes a base 8, and the end of the transmission shaft body 201 of the transmission shaft 2 exposed from the housing body 11 can be mounted on the base 9.

[0034] When the present invention is in use, the base 9 can be fixedly mounted on the door frame by bolts. One side of the door body of the door can be fixedly mounted on the housing body 11, and an auxiliary rotation structure can be mounted on the other side of the door body. Moreover, the housing 1 can be connected to an external liquid supply mechanism, so that the external liquid supply mechanism can fill hydraulic oil into the first oil passage 10, the second oil passage 20, and the third oil passage 30. And the entry or outflow of the hydraulic oil in the first oil passage 10 and the second oil passage 20 can be realized by relying on the external liquid supply mechanism.

[0035] When the door body is rotating, under the action of the first spring group 6, the roller 41 will always abut against the cam portion 21 of the transmission shaft 2. Thus, the roller 41 will move along the periphery of the cam portion 21 of the transmission shaft 2, that is, the roller 41 can move correspondingly with the rotation of the door body to avoid hindering the rotation of the door body.

[0036] Moreover, due to the height difference on the surface of the cam portion 21, the position of the roller 41 will change correspondingly. And the movement of the roller 41 will drive the movement of the piston 3, and the movement of the piston 3 will cause the volumes of the first oil passage 10 and the second oil passage 20 to change. For the oil passage with an increased volume, the external liquid supply mechanism can provide hydraulic oil for it. And for the oil passage with a reduced volume, its redundant hydraulic oil can flow out to the external liquid supply mechanism. In this way, the change of the hydraulic oil can adapt to the rotation of the door body, and the hydraulic oil can provide a certain driving force for the rotation of the door body to reduce the force required for the user to rotate the door body.

[0037] Meanwhile, under the action of the second spring group 7, since the outer valve body 55 of the movable valve 5 will always abut against the protruding portion 22 of the transmission shaft 2, the outer valve body 55 will move along the periphery of the protruding portion 22 of the transmission shaft 2, that is, the movable valve 5 can move correspondingly with the rotation of the door body to avoid hindering the rotation of the door body.

[0038] Therefore, when the door body is rotating, the various components of the present invention will not interfere with its rotation and can also assist its rotation to a certain extent so that it can rotate at any angle. Moreover, when people casually close the door, that is, when the user resets the door body, people often do not continuously apply an external force to the door body. However, in the present invention, the transmission shaft 2 is always abutted by the movable valve 5, and there will be no gap between the movable valve 5 and the transmission shaft 2, which can effectively reduce the inertial rotation of the door body, that is, the reset safety of the door body can be effectively improved.

[0039] On the other hand, the movable valve 5 in the present invention can also function as a safety valve. When an accident occurs in the second oil passage 20 and the internal pressure is too high, the hydraulic oil inside can lift the valve core 51, then the valve core spring 52 is compressed, and the valve core 51 no longer abuts against the inner valve body 54. The second oil passage 20 and the third oil passage 30 become connected, and the hydraulic oil in the second oil passage 20 can flow into the first oil passage 10 through the third oil passage 30 to relieve the pressure of the second oil passage 20. When the pressure in the second oil passage 20 returns to normal, under the action of the valve core spring 52, the valve core 51 can re-abut against the inner valve body 54 to close the second oil passage 20 and the third oil passage 30.

[0040] The above is only one implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention.

Claims

1. An arbitrarily rotatable and reset hydraulic door closer, characterized in that, It includes a housing (1), a transmission shaft (2), a piston (3), a roller assembly (4), a movable valve (5), a first spring group (6) and a second spring group (7). A cam portion (21) and a protruding portion (22) are provided on the transmission shaft (2). The roller assembly (4) abuts against the cam portion (21), and the movable valve (5) abuts against the protruding portion (22). The roller assembly (4) is rotatably mounted on the piston (3). The piston (3) is connected to the first spring group (6), the first spring group (6) is connected to the housing (1), the movable valve (5) is connected to the second spring group (7), and the second spring group (7) is connected to the housing (1). The movable valve (5) includes a valve core (51), a valve core spring (52), a locking pin (53), an inner valve body (54) and an outer valve body (55). The piston (3) is sleeved on the outer valve body (55). The outer valve body (55) is mounted on the inner valve body (54). The locking pin (53) is mounted on the inner valve body (54). One end of the valve core spring (52) is connected to the locking pin (53), and the other end is connected to the valve core (51). The outer valve body (55) abuts against the protruding portion (22), and the second spring group (7) is connected to the outer valve body (55). The movable valve (5) includes a guiding rod (56). The guiding rod (56) is connected to the outer valve body (55), and the guiding rod (56) is in contact with the transmission shaft (2). The roller assembly (4) includes a roller (41), a needle roller (42) and a fixing pin (43). The fixing pin (43) is mounted in the piston (3). The needle roller (42) is sleeved on the fixing pin (43), and the roller (41) is sleeved on the needle roller (42). The roller (41) abuts against the cam portion (21). The first spring group (6) includes a first spring (61) and a second spring (62). Both the first spring (61) and the second spring (62) have one end connected to the piston (3) and the other end connected to the housing (1). The first spring (61) is sleeved on the second spring (62).

2. The rotatable and resetable hydraulic door closer according to claim 1, wherein The housing (1) includes a housing main body (11), a first cover (12), a second cover (13) and a bushing (14). The first cover (12) is connected to one end of the housing main body (11). The second cover (13) is connected to the other end of the housing main body (11). The bushing (14) is mounted on the housing main body (11) and sleeved on the transmission shaft (2).

3. The rotatable and resettable oil-pressure door closer according to claim 1, wherein The second spring group (7) includes a third spring (71) and a fourth spring (72). Both the third spring (71) and the fourth spring (72) have one end connected to the movable valve (5) and the other end connected to the housing (1). The third spring (71) is sleeved on the fourth spring (72).

4. The arbitrarily rotatable and reset hydraulic door closer according to claim 1, characterized in that, The piston (3) separates a first oil passage (10) and a second oil passage (20) within the housing (1). A third oil passage (30) communicating with the first oil passage (10) is provided within the piston (3). The movable valve (5) is used to control the communication between the second oil passage (20) and the third oil passage (30).

5. The rotatable and resettable hydraulic door closer according to claim 1, wherein, It includes a base (8), and the transmission shaft (2) is installed on the base (8).

Images