360 degree rotatable hydraulic door closer

Abstract

The present invention discloses a 360-degree rotatable hydraulic door closer, including a housing, a transmission shaft, a piston, a roller assembly and a valve assembly, wherein a cam portion is provided on the transmission shaft, the roller assembly abuts against the cam portion, the roller assembly is rotatably mounted on the piston, the piston is mounted in the housing, and a first oil passage and a second oil passage are separated in the housing, a third oil passage connected to the second oil passage is provided in the piston, and the valve assembly is used to control the connection between the first oil passage and the third oil passage. The present invention can be applied to a door, the door body of the door can be mounted on the housing, and the first oil passage and the second oil passage can be filled with hydraulic oil, the housing can rotate with the rotation of the door body, and the flow of the hydraulic oil in the first oil passage and the second oil passage can cooperate with the movement of the door body to ensure that the door body can rotate continuously, so as to realize the 360-degree rotation of the door body, thereby improving the applicable scope of the present invention.

Description

Technical Field

[0001] The invention relates to the field of door closer design, in particular to a 360-degree rotatable oil pressure door closer. Background Art

[0002] In the past, common doors often needed to be manually closed after being opened, and the doors were easily affected by external forces such as wind when in use and could not maintain their open or closed state. In order to solve the above problems, many doors are now equipped with door closers, which have the function of resetting the door so that it can return to its closed state after being opened, and can also maintain the position of the door so that it can maintain a specific open position and reduce the impact of external forces such as wind on the door. On the other hand, the door closer can also provide a certain amount of damping during the opening or closing process of the door to prevent the door from moving too fast and causing collisions with people or objects behind the door.

[0003] However, most common door closers can only allow the door to be opened to 90°, and a few can allow the door to be opened to 180°. Therefore, in some occasions where the door needs to be opened and closed more than 180°, the above door closers cannot be used, and the application range is narrow, and it is difficult to meet people's needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a 360-degree rotatable oil pressure door closer, which can solve one or more of the above problems.

[0005] According to one aspect of the present invention, a 360-degree rotatable hydraulic door closer is provided, comprising a housing, a transmission shaft, a piston, a roller assembly and a valve assembly, wherein a cam portion is provided on the transmission shaft, the roller assembly abuts against the cam portion, the roller assembly is rotatably mounted on the piston, the piston is mounted in the housing, and a first oil passage and a second oil passage are separated in the housing, a third oil passage connected to the second oil passage is provided in the piston, and the valve assembly is used to control the connectivity between the first oil passage and the third oil passage.

[0006] The beneficial effects of the present invention are as follows: the present invention can be applied to a door, the door body of the door can be installed on the shell, and the first oil channel and the second oil channel can be filled with hydraulic oil, the shell can rotate with the rotation of the door body, thereby changing the position of the roller assembly on the cam portion, so that a pressure difference occurs between the first oil channel and the second oil channel, thereby changing the state of the valve assembly, so that the hydraulic oil between the first oil channel and the second oil channel can flow accordingly to maintain the pressure difference balance between the first oil channel and the second oil channel, that is, the flow of the hydraulic oil in the first oil channel and the second oil channel can cooperate with the movement of the door body to ensure that the door body can rotate continuously, so as to realize the 360-degree rotation of the door body, thereby improving the scope of application of the present invention.

[0007] In some embodiments, the valve assembly includes a valve core, a valve core spring, a lock pin and a valve body, the valve body is installed in the piston, the valve body is provided with a valve flow channel, the lock pin is installed on the valve body, one end of the valve core spring is connected to the lock pin, and the other end is connected to the valve core, and the valve core blocks the valve flow channel. Thus, the movement of the valve core can realize the opening or blocking of the valve flow channel, and the setting of the valve core spring can ensure the movement accuracy of the valve core.

[0008] In some embodiments, the roller assembly includes a roller, a needle roller and a fixing pin, wherein 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, and 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 effect of the roller when rotating.

[0009] In some embodiments, the cam portion is provided with a first convex position, a second convex position, a first concave position and a second concave position, the first convex position and the second convex position are symmetrically arranged, and the first concave position and the second concave position are symmetrically arranged. When necessary, the roller assembly can stay on the first concave position or the second concave position, so that the door body connected to the present invention can stop at a specific angle, and the first convex position and the second convex position can prevent the roller assembly from passing easily and prevent the roller assembly from staying, so as to prevent the door body connected to the present invention from staying at a specific angle.

[0010] In some embodiments, the present invention further comprises a first spring, one end of which is connected to one end of the housing, and the other end of which is opposite to one end of the piston. The first spring can limit the movement direction of the piston to prevent the piston from moving excessively in this direction and causing damage to other structures.

[0011] In some embodiments, the present invention further comprises a second spring, one end of which is connected to the other end of the housing, and the other end of which is opposite to the other end of the piston. The second spring can limit the other moving direction of the piston, thereby preventing the piston from moving excessively in this direction and causing damage to other structures.

[0012] In some embodiments, the present invention further comprises a third spring, one end of which is connected to the housing, and the other end of which is opposite to the piston, and the third spring is sleeved on the second spring, and the length of the third spring is shorter than that of the second spring. The third spring can be used as a further limiter when the piston moves in the direction of the second spring, thereby further preventing the piston from moving excessively in this direction on the basis of the limiter of the second spring.

[0013] In some embodiments, the shell includes a shell body, a first cover, a second cover and a sleeve, the first cover is connected to one end of the shell body, the second cover is connected to the other end of the shell body, and the sleeve is installed on the shell body and sleeved on the transmission shaft.

[0014] In some embodiments, the present invention further comprises a base, and the transmission shaft is mounted on the base. The provision of the base can facilitate the fixing of the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded view of the structural schematic diagram of a 360-degree rotatable oil pressure door closer according to an embodiment of the present invention.

[0016] Figure 2 yes Figure 1 A sectional view of a front view of a 360-degree rotatable hydraulic door closer.

[0017] Figure 3 yes Figure 1 A cross-sectional view of a top view of a 360-degree rotatable hydraulic door closer.

[0018] Figure 4 yes Figure 1 Schematic diagram of the use of the 360-degree rotatable hydraulic door closer. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A 360-degree rotatable oil pressure door closer of the present invention comprises a housing 1, a transmission shaft 2, a piston 3, a roller assembly 4 and a valve assembly 5.

[0021] The housing 1 includes a housing body 11, a first cover 12, a second cover 13 and a sleeve 14. The first cover 12 is fixedly connected to one end of the housing body 11 by threaded fit, the second cover 13 is fixedly connected to the other end of the housing body 11 by threaded fit, and the sleeve 14 is fixedly installed on the housing body 11 by threaded fit. In addition, O-rings can be installed in the first cover 12, the second cover 13 and the sleeve 14 as needed to improve the sealing performance of this part.

[0022] The transmission shaft 2 includes a transmission shaft body 201, a gasket 202, a first needle bearing 203 and a second needle bearing 204. One end of the transmission shaft body 201 is embedded in the shell body 11 through the first needle bearing 203, and a gasket 203 is provided between the top of the transmission shaft body 201 and the shell body 11. The other end of the transmission shaft body 201 passes through the piston 3 and the shell body 11 in sequence and then comes out, and the sleeve 14 is sleeved on the transmission shaft body 201 through the second needle bearing 204.

[0023] The roller assembly 4 includes a roller 41, a needle roller 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 roller 42 is sleeved on the fixing pin 43, and the roller 41 is sleeved on the needle roller 42. The roller 41 can rotate on the needle roller 42, that is, the roller assembly 4 is rotatably mounted on the piston 3, and the top and bottom of the roller 41 are padded with the first roller gasket 44 and the second roller gasket 45 between the piston 3 respectively.

[0024] The transmission shaft body 201 of the transmission shaft 2 is provided with a cam portion 21, and the cam portion 21 is provided with a first convex position 211, a second convex position 212, a first concave position 213 and a second concave position 214. The first convex position 211 and the second convex position 212 are symmetrically arranged, and the first concave position 213 and the second concave position 214 are symmetrically arranged.

[0025] After the roller assembly 4 and the transmission shaft 2 are arranged, the roller 41 will abut against the cam portion 21 .

[0026] The valve assembly 5 includes a valve core 51, a valve core spring 52, a lock pin 53, a valve body 54 and a collar 55. The valve body 54 is embedded in the piston 3 through the collar 55, the lock pin 53 is fixedly mounted on the valve body 54, one end of the valve core spring 52 is fixedly connected to the lock 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.

[0027] The housing 1 is provided with a cavity, the piston 3 is embedded in the cavity of the housing 1, and the cavity in the housing 1 is divided into a first oil passage 10 and a second oil passage 20, the piston 3 is provided with a third oil passage 30, and the valve body 54 is provided with a valve flow passage 541. The third oil passage 30 is connected with the second oil passage 20 through a through hole, and when the valve flow passage 541 is not blocked, the third oil passage 30 is also connected with the first oil passage 10, and the valve core 51 can resist the valve flow passage 541 under the action of the valve core spring 52, so that the valve flow passage 541 is blocked, so that the third oil passage 30 is blocked from the first oil passage 10, that is, the valve assembly 5 can be used to control the connection between the first oil passage 10 and the third oil passage 30.

[0028] The present invention further includes a first spring 6 and a second spring 7. One end of the first spring 6 is fixedly connected to the first cover 12 of the housing 1, and the other end of the first spring 6 is opposite to one end of the piston 3. One end of the second spring 7 is fixedly connected to the second cover 13 of the housing 1, and the other end of the second spring 7 is opposite to the other end of the piston 3. Therefore, when the piston 3 moves in the housing 1, the first spring 6 and the second spring 7 can limit the limit position to which the piston 3 can move, so as to avoid excessive movement of the piston 3 and damage to the present invention.

[0029] The present invention also includes a third spring 8, one end of which is fixedly connected to the housing 1, and the other end of the third spring 8 is opposite to the piston 3. The third spring 8 is sleeved on the second spring 7, and the third spring 8 is arranged parallel to the second spring 7. The length of the third spring 8 is shorter than that of the second spring 7. When the piston 3 moves excessively on the second spring 7, the third spring 8 can assist the second spring 7 to limit it.

[0030] The present invention further comprises a base 9 , and the end of the transmission shaft body 201 of the transmission shaft 2 passing through the housing body 11 is fixedly mounted on the base 9 .

[0031] When the present invention is in use, the base 9 can be fixedly installed on the door frame by bolts, one side of the door body can be fixedly installed on the shell body 11, and an auxiliary rotating structure can be installed on the other side of the door body, and the first oil channel 10 and the second oil channel 20 can be connected to the external oil tank respectively, so that the external oil tank can supply oil to the first oil channel 10 and the second oil channel 20, so that the first oil channel 10, the second oil channel 20, the third oil channel 30 and the valve flow channel 541 are all filled with hydraulic oil.

[0032] When the door body is rotating, the roller 41 will move along the periphery of the cam portion 21 of the transmission shaft 2. Due to the height difference on the surface of the cam portion 21, the position of the roller 41 will change, and the movement of the roller 41 will drive the movement of the piston 3 to achieve a 360-degree rotation. Specifically, this embodiment takes the roller 41 moving from the second concave position 214 to the first convex position 211, then from the first convex position 211 to the first concave position 213, then from the first concave position 213 to the second convex position 212, and finally from the second convex position 212 back to the second concave position 214, thereby achieving a 360-degree rotation of the door body.

[0033] When the roller 41 moves from the second recessed position 214 to the first convex position 211 and from the first recessed position 213 to the second convex position 212, the movement of the piston 3 will reduce the volume of the second oil channel 20 and increase the pressure. The hydraulic oil in the second oil channel 20 will be pressed into the external oil tank. At the same time, the volume of the first oil channel 10 will increase and the pressure will decrease. The first oil channel 10 will absorb oil into the external oil tank, so that the hydraulic oil will not only not hinder the movement of the piston 3, but also provide a certain auxiliary force for the movement of the piston 3.

[0034] When the roller 41 moves from the first convex position 211 to the first concave position 213 and from the second convex position 212 to the second concave position 214, the movement of the piston 3 will reduce the volume of the first oil channel 10 and increase the pressure, while the volume of the second oil channel 20 will increase and the pressure will decrease. Under pressure, the valve core 51 will be pushed open, so that the valve flow channel 541 opens, and the first oil channel 10 and the third oil channel 30 become connected, that is, the first oil channel 10 and the second oil channel 20 also become connected. The hydraulic oil in the first oil channel 10 can flow into the second oil channel 20 to balance the pressure on both sides. Therefore, the hydraulic oil will not only not hinder the movement of the piston 3, but also provide a certain auxiliary force for the movement of the piston 3.

[0035] When the door needs to be stationary, the roller 41 can be stopped at the first concave position 213 or the second concave position 214. In addition, during the movement of the roller 41, unless it stops at the first concave position 213 or the second concave position 214, due to the height difference on the surface of the cam portion 21, even if the user stops applying force to the door, the roller 41 can still return to the first concave position 213 or the second concave position 214 along the surface of the cam portion 21, thus realizing automatic closing of the door. In addition, according to the required stationary position of the door, other concave positions can be set on the cam portion 21 accordingly to facilitate the stop of the roller 41.

[0036] The above is only one embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. 360 degree rotatable hydraulic door closer, characterized by: The invention comprises a housing (1), a transmission shaft (2), a piston (3), a roller assembly (4) and a valve assembly (5); the transmission shaft (2) is provided with a cam portion (21); the roller assembly (4) abuts against the cam portion (21); the roller assembly (4) is rotatably mounted on the piston (3); the piston (3) is mounted in the housing (1) and a first oil passage (10) and a second oil passage (20) are separated in the housing (1); a third oil passage (30) connected to the second oil passage (20) is provided in the piston (3); and the valve assembly (5) is used to control the communication between the first oil passage (10) and the third oil passage (30). The cam portion (21) is provided with a first convex position (211), a second convex position (212), a first concave position (213) and a second concave position (214); the first convex position (211) and the second convex position (212) are symmetrically arranged; the first concave position (213) and the second concave position (214) are symmetrically arranged; It comprises a first spring (6), one end of which is connected to one end of the housing (1), and the other end of which is opposite to one end of the piston (3). It comprises a second spring (7), one end of the second spring (7) is connected to the other end of the housing (1), and the other end of the second spring (7) is opposite to the other end of the piston (3).

2. The 360-degree rotatable hydraulic door closer according to claim 1, characterized in that: The valve assembly (5) comprises a valve core (51), a valve core spring (52), a locking pin (53) and a valve body (54); the valve body (54) is installed in the piston (3); the valve body (54) is provided with a valve flow channel (541); the locking pin (53) is installed on the 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 valve core (51) blocks the valve flow channel (541).

3. The 360-degree rotatable hydraulic door closer according to claim 1, characterized in that: The roller assembly (4) comprises a roller (41), a roller needle (42) and a fixing pin (43); the fixing pin (43) is installed in the piston (3); the roller needle (42) is sleeved on the fixing pin (43); the roller (41) is sleeved on the roller needle (42); and the roller (41) abuts against the cam portion (21).

4. The 360-degree rotatable hydraulic door closer according to claim 1, characterized in that: The invention comprises a third spring (8), one end of the third spring (8) is connected to the housing (1), and the other end is opposite to the piston (3); the third spring (8) is sleeved on the second spring (7); and the length of the third spring (8) is shorter than that of the second spring (7).

5. The 360-degree rotatable hydraulic door closer according to claim 1, characterized in that: The housing (1) comprises a housing body (11), a first cover (12), a second cover (13) and a shaft sleeve (14); the first cover (12) is connected to one end of the housing body (11), the second cover (13) is connected to the other end of the housing body (11), and the shaft sleeve (14) is mounted on the housing body (11) and sleeved on the transmission shaft (2).

6. The 360-degree rotatable hydraulic door closer according to claim 1, characterized in that: It comprises a base (9), and the transmission shaft (2) is mounted on the base (9).

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