Door closer piston assembly

Abstract

The utility model relates to the technical field of door closers, and discloses a door closer piston assembly which comprises an assembly shell, a reset spring and a piston body are arranged in the assembly shell, and a driving connecting rod is rotationally arranged on the upper surface of the assembly shell. The tension adjusting assembly is arranged in the piston assembly shell, when the tension of the piston assembly needs to be adjusted, the limiting lead screw can be driven to rotate in the limiting round hole by rotating the adjusting nut, then the limiting lead screw drives the linkage strip block to transversely move in the rectangular guide hole in the end of the assembly shell, and therefore the tension of the piston assembly can be adjusted. And then the linkage strip block drives the limiting baffle to move in the assembly shell, so that the end, away from the piston, of the reset spring is extruded and limited, the position of the other end of the piston is kept unchanged, the tension of the reset spring is adjusted, and then the magnitude of resistance borne when the door is closed is adjusted conveniently. The effect of conveniently adjusting the tension of the door closer is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of door closers, and more specifically to a door closer piston assembly. Background Art

[0002] The door closer is a dynamic controller for doors. Its main function is to control the opening and closing of doors and ensure the safety of doors. Its working principle is based on the working method of spring machinery. By setting the spring tension and door pressure, the door can be opened and closed. The main components of the door closer include spring, piston, valve, air chamber and door gasket. During the closing of the door, the spring will be compressed, so that the air is pushed into the air chamber through the piston, so that the valve closes the door. During the opening of the door, the spring will be stretched and the air will be discharged from the air chamber through the piston, so that the door will open.

[0003] However, the structure of the door closer piston assembly in the prior art is poor in adjustability, and it is not convenient for the user to directly adjust the tension of the door closer piston spring. When adjusting, the housing of the door closer piston assembly needs to be disassembled, which increases the difficulty of the adjustment operation and leads to inconvenience in use. Therefore, it is necessary to make certain improvements to the existing door closer piston assembly. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a door closer piston assembly, which has the advantages of high adjustability, etc., to solve the problems existing in the above-mentioned background technology.

[0005] The utility model provides the following technical solution: a door closer piston assembly, comprising an assembly housing, a return spring and a piston body are arranged inside the assembly housing, a driving connecting rod is rotatably arranged on the upper surface of the assembly housing, a movable bent rod is fixedly connected to the surface of the driving connecting rod, an end of the movable bent rod away from the driving connecting rod is rotatably connected to a rocker arm, an adjustment mechanism is arranged on the surface of the rocker arm, and the adjustment mechanism is used to adjust and limit the angle between the movable bent rod and the assembly housing;

[0006] The surface of the assembly shell is provided with a tension adjustment component, and the tension adjustment component includes a limit circular shell fixedly connected to the left end of the assembly shell, a mounting hole is opened on the side of the limit circular shell, and the interior of the mounting hole is rotatably connected to the limit screw rod through a bearing, and the surface of the limit screw rod is threadedly connected with a linkage block, the right end of the linkage block extends to the interior of the assembly shell, and the right end of the linkage block is fixedly connected to the limit baffle, the left end of the reset spring is fixedly connected to the right side of the limit baffle, and the limit baffle is slidably connected to the inner wall of the assembly shell, and the tension adjustment component is used to adjust the tension of the reset spring;

[0007] By rotating the adjusting nut, the limit screw is driven to rotate inside the limit circular hole, and then the limit screw drives the linkage block to move horizontally in the rectangular guide hole at the end of the assembly shell, and then the linkage block drives the limit baffle to move in the assembly shell, thereby squeezing and limiting the end of the return spring away from the piston, while the position of the other end of the piston remains unchanged, thereby adjusting the tension of the return spring.

[0008] Furthermore, the left end of the limiting screw rod extends to the outside of the limiting circular shell, and the left end of the limiting screw rod is fixedly connected with an adjusting nut, and the adjusting nut is used to drive the limiting screw rod to rotate.

[0009] Furthermore, a rectangular guide hole is opened at the left end of the assembly shell, and the linkage bar is slidably connected to the inner wall of the rectangular guide hole.

[0010] Furthermore, the adjustment mechanism includes an adjustment frame sleeved on the surface of the rocker arm, the end of the adjustment frame is provided with a limiting through hole matching the rocker arm, and the rocker arm is slidably connected to the inner wall of the limiting through hole.

[0011] Further, a positioning plate is fixedly connected to the upper surface of the adjustment frame, a positioning bolt hole is opened on the upper surface of the positioning plate, a positioning bolt is threadedly connected to the inner wall of the positioning bolt hole, and a plurality of positioning holes are opened on the upper surface of the rocker arm, the positions of the positioning holes correspond to the positioning bolts, and the sizes of the positioning holes match the positioning bolts;

[0012] Through the above technical scheme, the rocker arm can be moved inside the rectangular guide hole of the adjusting frame, so that the length of the rocker arm extending out of the adjusting frame can be adjusted, and the rocker arm can be fixed and limited by positioning bolts and positioning holes, thereby facilitating the adjustment of the overall length of the rocker arm and the adjusting frame, thereby adjusting the angle between the rocker arm and the active curved rod.

[0013] Furthermore, two strip-shaped slide grooves symmetrically positioned to each other are provided on the inner side of the adjustment frame, and limit sliders are fixedly connected to the left and right sides of the rocker arm, and the limit sliders are slidably connected to the inner walls of the strip-shaped slide grooves.

[0014] Furthermore, the end of the adjustment frame is rotatably connected to a rotating support column, and the upper and lower ends of the rotating support column are fixedly connected to a door frame mounting plate. The door frame mounting plate is in a U-shape, and two mounting screw holes are provided on the back of the door frame mounting plate.

[0015] Technical effects and advantages of the utility model:

[0016] 1. The utility model provides a tension adjustment component inside the piston assembly housing. When the tension of the piston assembly needs to be adjusted, the adjusting nut can be rotated to drive the limit screw to rotate inside the limit circular hole, and then the limit screw drives the linkage block to move horizontally in the rectangular guide hole at the end of the assembly housing, and then the linkage block drives the limit baffle to move in the assembly housing, so that the end of the reset spring away from the piston is squeezed and limited, while the position of the other end of the piston remains unchanged, so that the tension of the reset spring is adjusted, and then the resistance size when closing the door is conveniently adjusted, so as to achieve the effect of conveniently adjusting the tension of the door closer.

[0017] 2. The utility model provides an adjustment mechanism, which can move the rocker arm inside the rectangular guide hole of the adjustment frame, thereby adjusting the length of the rocker arm extending out of the adjustment frame, and using positioning bolts and positioning holes to fix and limit the rocker arm, thereby facilitating adjustment of the overall length of the rocker arm and the adjustment frame, thereby adjusting the angle between the rocker arm and the active crankshaft, and thereby facilitating fine-tuning the rotation stroke of the driving connecting rod, thereby achieving the purpose of high adjustability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional first-view structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional second viewing angle structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the tension adjustment component of the utility model;

[0021] Figure 4 It is a schematic diagram of the front section structure of the limiting mechanism of the utility model.

[0022] The reference numerals are: 1, assembly housing; 2, return spring; 3, piston body; 4, driving connecting rod; 5, movable crank rod; 6, door frame mounting plate; 7, rocker arm; 8, adjustment mechanism; 9, tension adjustment assembly; 10, rectangular guide hole; 11, limit slider; 12, rotating support column;

[0023] 801, adjustment frame; 802, limit through hole; 803, positioning plate; 804, positioning bolt; 805, positioning hole; 806, strip slide;

[0024] 901, limit round shell; 902, limit screw rod; 903, linkage block; 904, limit baffle; 905, adjusting nut. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The door closer piston assembly involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0026] Reference Figure 1-4 The utility model provides a door closer piston assembly, including an assembly shell 1, a reset spring 2 and a piston body 3 are arranged inside the assembly shell 1, and a driving connecting rod 4 is rotatably arranged on the upper surface of the assembly shell 1. It should be noted that the bottom end of the driving connecting rod 4 extends to the inside of the assembly shell 1 and is fixed with a driving gear, and a rack is fixedly arranged inside the piston body 3, and the driving gear is meshed with the rack. By rotating the driving connecting rod 4, the driving gear can be driven to rotate inside the piston body 3, and then the piston body 3 is driven to move horizontally inside the assembly shell 1 through the rack, and then the piston body 3 is used to squeeze the reset spring 2.

[0027] A movable bent rod 5 is fixedly connected to the surface of the driving connecting rod 4, and one end of the movable bent rod 5 away from the driving connecting rod 4 is rotatably connected to a rocker arm 7. An adjustment mechanism 8 is provided on the surface of the rocker arm 7, and the adjustment mechanism 8 is used to adjust and limit the angle between the movable bent rod 5 and the assembly housing 1.

[0028] The adjusting mechanism 8 comprises an adjusting frame 801 sleeved on the surface of the rocker arm 7 , a limiting through hole 802 matching the rocker arm 7 is formed at the end of the adjusting frame 801 , and the rocker arm 7 is slidably connected to the inner wall of the limiting through hole 802 .

[0029] A positioning plate 803 is fixedly connected to the upper surface of the adjusting frame 801, a positioning bolt hole is provided on the upper surface of the positioning plate 803, a positioning bolt 804 is threadedly connected to the inner wall of the positioning bolt hole, and a plurality of positioning holes 805 are provided on the upper surface of the rocker arm 7, the positions of the positioning holes 805 correspond to the positioning bolts 804, and the sizes of the positioning holes 805 match the positioning bolts 804.

[0030] Two symmetrical strip slide grooves 806 are provided on the inner side of the adjustment frame 801 . The left and right sides of the rocker arm 7 are fixedly connected with limit sliders 11 . The limit sliders 11 are slidably connected to the inner walls of the strip slide grooves 806 .

[0031] The end of the adjustment frame 801 is rotatably connected to a rotating support column 12, and the upper and lower ends of the rotating support column 12 are fixedly connected to a door frame mounting plate 6, which is in a U-shaped shape and has two mounting screw holes on the back side.

[0032] It is worth mentioning that by providing an adjustment mechanism 8 on the surface of the rocker arm 7, the rocker arm 7 can be moved inside the rectangular guide hole 10 of the adjustment frame 801, so that the length of the rocker arm 7 extending out of the adjustment frame 801 can be adjusted, and the positioning bolt 804 is tightened into the positioning hole 805 on the surface of the rocker arm 7 to position the rocker arm 7. The overall length of the rocker arm 7 and the adjustment frame 801 can be adjusted, and the angle between the rocker arm 7 and the active bent rod 5 can be adjusted at the same time, so as to achieve fine adjustment of the rotation stroke of the driving connecting rod 4, and then adjust the rotation stroke of the piston body 3, so that the piston assembly can achieve the purpose of high adjustability.

[0033] A tension adjustment component 9 is provided on the surface of the assembly shell 1, and the tension adjustment component 9 includes a limiting circular shell 901 fixedly connected to the left end of the assembly shell 1, and a mounting hole is opened on the side of the limiting circular shell 901. The interior of the mounting hole is rotatably connected to a limiting screw rod 902 through a bearing, and the left end of the limiting screw rod 902 extends to the outside of the limiting circular shell 901, and the left end of the limiting screw rod 902 is fixedly connected to an adjusting nut 905, and the adjusting nut 905 is used to drive the limiting screw rod 902 to rotate.

[0034] The surface of the limiting screw rod 902 is threadedly connected with a linkage block 903 , the right end of the linkage block 903 extends into the interior of the assembly housing 1 , and the right end of the linkage block 903 is fixedly connected with a limiting baffle 904 .

[0035] A rectangular guide hole 10 is provided at the left end of the assembly housing 1 , and the linkage bar 903 is slidably connected to the inner wall of the rectangular guide hole 10 . By providing the rectangular guide hole 10 , the linkage bar 903 can be limited and guided by the rectangular guide hole 10 .

[0036] The left end of the return spring 2 is fixedly connected to the right side of the limit baffle 904 , the limit baffle 904 is slidably connected to the inner wall of the assembly housing 1 , and the tension adjustment component 9 is used to adjust the tension of the return spring 2 .

[0037] It is worth mentioning that, by arranging a tension adjustment component 9 inside the piston assembly housing 1, when the tension of the piston assembly needs to be adjusted, the adjusting nut 905 can be rotated to drive the limit screw 902 to rotate inside the limit circular shell 901, and then the limit screw 902 drives the linkage block 903 to move horizontally in the rectangular guide hole 10 at the end of the assembly housing 1, and then the linkage block 903 drives the limit baffle 904 to move in the assembly housing 1, thereby squeezing and limiting the end of the reset spring 2 away from the piston body 3. Since the position of the other end of the piston body 3 remains unchanged, the tension of the reset spring 2 can be adjusted, and then the resistance size encountered when closing the door can be adjusted conveniently, thereby achieving the effect of conveniently adjusting the tension of the door closer.

[0038] Finally, it should be noted that the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model. The above description is only a preferred embodiment of the present utility model and is not used to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A door closer piston assembly, comprising an assembly housing (1), wherein a return spring (2) and a piston body (3) are arranged inside the assembly housing (1), characterized in that: A drive link (4) is rotatably arranged on the upper surface of the assembly housing (1). A movable curved rod (5) is fixedly connected to the surface of the drive link (4). One end of the movable curved rod (5) far from the drive link (4) is rotatably connected to a rocker arm (7). An adjusting mechanism (8) is arranged on the surface of the rocker arm (7). The adjusting mechanism (8) is used to adjust and limit the angle between the movable curved rod (5) and the assembly housing (1). A tension adjusting assembly (9) is arranged on the surface of the assembly housing (1). The tension adjusting assembly (9) includes a limiting circular shell (901) fixedly connected to the left end of the assembly housing (1). An installation hole is formed in the side surface of the limiting circular shell (901). A limiting lead screw (902) is rotatably connected to the inside of the installation hole through a bearing. A linkage strip (903) is threadedly connected to the surface of the limiting lead screw (902). The right end of the linkage strip (903) extends into the interior of the assembly housing (1), and a limiting baffle (904) is fixedly connected to the right end of the linkage strip (903). The left end of the return spring (2) is fixedly connected to the right side of the limiting baffle (904). The limiting baffle (904) is slidably connected to the inner wall of the assembly housing (1). The tension adjusting assembly (9) is used to adjust the tension of the return spring (2).

2. A door closer piston assembly according to claim 1, characterized in that: The left end of the limiting lead screw (902) extends to the outside of the limiting circular shell (901), and an adjusting nut (905) is fixedly connected to the left end of the limiting lead screw (902). The adjusting nut (905) is used to drive the limiting lead screw (902) to rotate.

3. The door closer piston assembly according to claim 1, characterized in that: A rectangular guiding hole (10) is formed in the left end of the assembly housing (1). The linkage strip (903) is slidably connected to the inner wall of the rectangular guiding hole (10).

4. The door closer piston assembly according to claim 1, characterized in that: The adjusting mechanism (8) includes an adjusting frame (801) sleeved on the surface of the rocker arm (7). A limiting through hole (802) matching the rocker arm (7) is formed at the end of the adjusting frame (801). The rocker arm (7) is slidably connected to the inner wall of the limiting through hole (802).

5. A door closer piston assembly according to claim 4, characterized in that: A positioning plate (803) is fixedly connected to the upper surface of the adjusting frame (801). A positioning bolt hole is formed in the upper surface of the positioning plate (803). A positioning bolt (804) is threadedly connected to the inner wall of the positioning bolt hole. A plurality of positioning holes (805) are formed in the upper surface of the rocker arm (7). The positions of the positioning holes (805) correspond to the positioning bolt (804), and the sizes of the positioning holes (805) match the positioning bolt (804).

6. A door closer piston assembly according to claim 5, characterized in that: Two symmetrically arranged strip-shaped sliding grooves (806) are formed inside the adjusting frame (801). Limiting sliding blocks (11) are fixedly connected to both the left and right sides of the rocker arm (7). The limiting sliding blocks (11) are slidably connected to the inner walls of the strip-shaped sliding grooves (806).

7. A door closer piston assembly according to claim 6, characterized in that: A rotating support column (12) is rotatably connected to the end of the adjusting frame (801). Door frame mounting plates (6) are fixedly connected to the upper and lower ends of the rotating support column (12). The door frame mounting plates (6) are U-shaped, and two mounting screw holes are formed in the back surface of the door frame mounting plates (6).

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