Hydraulic buffer

Abstract

The utility model relates to a hydraulic buffer, which is used for mounting an automatic buffer door and is characterized in that a cam is mounted in the middle inside a shell and divides an inner cavity of the shell into a left side and a right side, a boss at the top of the cam protrudes towards the top surface of the shell, and an upper wheel disc and a lower wheel disc are stacked up and down on the middle section of the cam in the shell; the lower wheel disc is in an olive shape, the long axis of the upper wheel disc and the long axis of the lower wheel disc intersect in a cross shape, large grooves are formed in the middles of the short-axis symmetrical faces of the upper wheel disc respectively, small grooves are formed in the middles of the long-axis symmetrical faces of the upper wheel disc respectively, and stop planes are arranged in the middles of the short-axis symmetrical faces of the lower wheel disc respectively. The utility model has the advantages of stable structure, low working noise, capability of rotating by 360 degrees so as to adapt to the installation of various automatic doors, convenience in speed regulation and long service life.

Description

Technical Field

[0001] This utility model relates to a hydraulic buffer, specifically a hydraulic buffer that achieves 360-degree rotation through a central cam, i.e., a hydraulic buffer door closer. Background Technology

[0002] Most hydraulic buffer door closers on the market currently use gears and torsion springs to provide automatic door opening and closing force. This method can only buffer the opening and closing of doors at 90 degrees, and there are restrictions on the installation of left and right doors. It cannot realize the automatic buffer opening and closing of revolving doors in the middle or the automatic buffer door installation that requires opening and closing greater than 90 degrees. The lack of flexibility brings inconvenience to the installation of automatic door opening and closing. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic buffer that uses a cam-based buffer control system, enabling 360-degree rotation for buffering and opening / closing the door, thus achieving flexible adjustment and installation of the automatic door.

[0004] The technical solution of this utility model is based on a housing, a cam, a speed regulating needle, a main spring, a buffer piston, a positioning piston, a left piston spring, a piston with an oil passage, a right piston spring, a left sealing plug, and a right sealing plug. The feature is that the cam is installed in the middle of the housing, dividing the inner cavity of the housing into left and right sides. The top boss of the cam protrudes towards the top surface of the housing. An upper wheel and a lower wheel are stacked on top of each other in the middle section of the cam inside the housing. The upper wheel is shaped like a racetrack ring, and the lower wheel is shaped like an olive. The long axis of the upper wheel and the long axis of the lower wheel intersect in a cross shape. Large grooves are provided in the middle of the short axis symmetry plane of the upper wheel, and small grooves are provided in the middle of the long axis symmetry plane. A stopping plane is provided in the middle of the short axis symmetry plane of the lower wheel.

[0005] In this invention, the left sealing plug, the main spring, and the buffer piston are connected and installed sequentially from left to right in the left inner cavity of the outer shell. The buffer piston has a positioning platform protruding on the opposite side of the cam, and the positioning platform is adapted to the large groove arc of the wheel on the cam.

[0006] In this invention, a positioning piston, a left piston spring, a piston with an oil passage, a right piston spring, and a right sealing plug are sequentially connected and installed from left to right in the right inner cavity of the outer shell. A pulley that can rotate on its own is provided on the opposite side of the positioning piston and the cam, and the pulley is opposite to the lower wheel of the cam.

[0007] The working principle of this utility model is that the upper and lower wheel disks on the cam are cross-mounted, so that when the cam rotates, it can receive the thrust of the main spring and the buffering force of the buffer piston when the rotation is greater than zero degrees and less than ninety degrees and greater than ninety degrees and less than one hundred and eighty degrees, thus achieving the buffering effect of opening and closing the door. At the same time, because the cam can rotate 360 ​​degrees, it is suitable for the installation methods of left, center and center automatic doors, and the buffering effect of opening and closing the door can be easily adjusted by adjusting the speed adjustment needle.

[0008] The advantages of this utility model are stable structure, low operating noise, 360-degree rotation to adapt to various automatic door installations, convenient speed adjustment, and long service life. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0010] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0011] Figure 3 This is a three-dimensional structural diagram of the buffer piston of this utility model;

[0012] Figure 4 This is a three-dimensional structural diagram of the positioning piston of this utility model;

[0013] Figure 5 This is a schematic diagram of the three-dimensional structure of the piston with an oil passage according to this utility model. Detailed Implementation

[0014] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, based on the outer shell 1, cam 2, speed regulating needle 3, main spring 4, buffer piston 5, positioning piston 6, left piston spring 7, piston with oil passage 8, right piston spring 9, left sealing plug 10.1, and right sealing plug 10.2, the characteristic is that the cam 2 is installed in the middle of the inner cavity of the outer shell 1, dividing the inner cavity of the outer shell into left and right sides. The top boss of the cam 2 protrudes towards the top surface of the outer shell. In the middle section of the cam inside the outer shell 1, an upper wheel 2.1 and a lower wheel 2.2 are superimposed on each other. The shape of the upper wheel 2.1 is a racetrack ring, and the shape of the lower wheel 2.2 is olive-shaped. The long axis of the upper wheel 2.1 and the long axis of the lower wheel 2.2 intersect in a cross shape. Large grooves are provided in the middle of the short axis symmetry plane of the upper wheel 2.1, and small grooves are provided in the middle of the long axis symmetry plane. A stopping plane is provided in the middle of the short axis symmetry plane of the lower wheel 2.2. In the left inner cavity of the outer casing 1, the left sealing plug 10.1, the main spring 4, and the buffer piston 5 are connected and installed sequentially from left to right. The buffer piston 5 has a positioning platform protruding on the surface opposite to the cam, and the positioning platform is adapted to the curvature of the large and small grooves of the upper wheel 2.1 of the cam 2. In the right inner cavity of the outer casing 1, the positioning piston 6, the left piston spring 7, the piston 8 with oil passage, the right piston spring 9, and the right sealing plug 10.2 are connected and installed sequentially from left to right. The positioning piston 6 has a pulley 6.1 that can rotate on its own on the surface opposite to the cam 2. The pulley 6.1 is opposite to the lower wheel 2.2 of the cam 2. Hydraulic oil return passages are respectively provided on the right end of the front and rear cavity walls of the right inner cavity of the outer casing 1. The speed regulating needle 3 is inserted into the return passage from the right end of the outer casing. Rotating the speed regulating needle 3 can adjust the size of the oil passage, thereby adjusting the buffering force of the hydraulic buffer.

Claims

1. Hydraulic damper comprising a housing, a cam, a speed regulating needle, a main force spring, a damper piston, a positioning piston, a left piston spring, a piston with oil passage, a right piston spring, a left sealing plug, a right sealing plug, characterized in that The cam is installed in the middle of the inner part of the shell, which divides the inner cavity of the shell into left and right sides. The top boss of the cam protrudes to the top surface of the shell. The upper and lower disks are stacked on the upper and lower middle sections of the cam in the shell. The shape of the upper disk is a racetrack ring, and the shape of the lower disk is an olive shape. The long axes of the upper and lower disks cross each other. The large recesses are arranged in the middle of the short axis symmetry plane of the upper disk. The small recesses are arranged in the middle of the long axis symmetry plane. The rest planes are arranged in the middle of the short axis symmetry plane of the lower disk.

2. Hydraulic damper according to claim 1, characterized in that In the left inner cavity of the shell, the left sealing plug, the main spring and the buffer piston are sequentially connected and installed from left to right. The buffer piston has a positioning table protruding from the opposite surface of the cam. The positioning table is adapted to the curvature of the large recess of the upper disk of the cam.

3. Hydraulic damper according to claim 1, characterized in that In the right inner cavity of the shell, the positioning piston, the left piston spring, the piston with oil way, the right piston spring and the right sealing plug are sequentially connected and installed from left to right. The positioning piston is arranged with a pulley which can rotate by itself on the opposite surface of the cam. The pulley is opposite to the lower disk of the cam.

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