Support arm connecting structure of door closer

Abstract

The utility model discloses a kind of support arm connecting structures of door closer, including support arm and connecting screw;Door closer is equipped with damping pivot, transmission connector is equipped on damping pivot, and the end surface of transmission connector is equipped with connecting screw hole;The one end of the support arm is equipped with the transmission connection hole directly transmission sleeve connection with transmission connector, and connecting screw is connected with connecting screw hole by transmission connection hole;Or, transmission connection hole is connected with transmission connector by pad high sleeve, and the both ends of pad high sleeve are respectively transmission stud head and transmission sleeve cavity, transmission stud head center is equipped with through-hole, and transmission stud head and transmission sleeve cavity are respectively connected with transmission connection hole and transmission connector transmission sleeve connection, and connecting screw is connected with connecting screw hole after transmission connection hole and through-hole are passed through.The support arm of the utility model is set apart with pad high sleeve, it can be separated from pad high sleeve and damping pivot transmission connection, to reduce its installation space, suitable for narrow door frame door body use.

Description

Technical Field

[0001] This utility model relates to a door closer, and more particularly to a support arm connection structure for a door closer. Background Technology

[0002] See Figure 11 and Figure 12 The diagram shows a schematic of a prior art door closer support arm structure. One end of the support arm 1 is integrally welded with a sleeve 14. The bottom surface of the sleeve 14 has a quincunx-shaped cavity 15, and the top surface of the support arm 1 has an opening 12 corresponding to the sleeve 14. The top of the opening 12 has a recess 13. The door closer, which cooperates with the support arm 1, has a damping shaft. The end of the damping shaft extends out of the door closer's housing and has a square transmission connector. During installation, the door closer is placed on the door leaf, and the support arm 1 cooperates with the square transmission connector of the damping shaft through the quincunx-shaped cavity 15. The other end of the support arm 1 is connected to the door frame through a hinge. Because the height of the sleeve 14 is fixed and cannot be disassembled, when the installation space of the door leaf is limited, the integral sleeve support arm will interfere with the upper door frame. Utility Model Content

[0003] The purpose of this utility model is to provide a door closer arm connection structure that is structurally reasonable and can be used in a variety of door sizes.

[0004] The purpose of this utility model is achieved as follows: A door closer arm connection structure includes an arm and a connecting screw. The door closer has a damping shaft, the end of which extends out of the door closer's housing and has a transmission connector. The end face of the transmission connector has a connecting screw hole. One end of the arm has a transmission connection hole adapted to the transmission connector. The transmission connection hole directly engages with the transmission connector to achieve circumferential transmission. The connecting screw passes through the transmission connection hole and connects to the connecting screw hole. Alternatively, the transmission connection hole connects to the transmission connector through a shim sleeve. The two ends of the shim sleeve have adapted transmission pins and transmission cavities corresponding to the transmission connection hole and the transmission connector, respectively. The center of the transmission pin also has a through hole corresponding to the connecting screw. The through hole extends from the end face of the transmission pin to the inner end face of the transmission cavity. The transmission pin and the transmission cavity engage with the transmission connection hole and the transmission connector, respectively, to achieve mutual circumferential transmission. The connecting screw passes through the transmission connection hole and the through hole and connects to the connecting screw hole.

[0005] The objective of this utility model can also be achieved by the following technical measures: As a more specific embodiment, the cross-sections of the transmission connector, the transmission connection hole, the transmission column head, and the transmission sleeve cavity are all square.

[0006] As a further solution, the wall surface of the transmission connection hole is inclined relative to the long side of the support arm. Given that the relative positions of the damping shaft and the door closer mounting surface are fixed, and the length of the support arm is fixed, the mating angle between the transmission connector of the damping shaft and the transmission connection hole of the support arm is determined. This structure, by limiting the relative inclination angle of the transmission connection hole, facilitates one-step installation; and the shape of the transmission connection hole perfectly matches the outer wall of the transmission connector, avoiding the shortcomings of the existing quincunx-shaped connection holes and square connectors. Furthermore, because the mating area is larger, wear and slippage on the contact surface are prevented.

[0007] As a further embodiment, the shim sleeve includes a column body, the top surface of which protrudes to provide the transmission column head, and the bottom surface of which is recessed upward to form the transmission sleeve cavity.

[0008] As a further embodiment, the depth of the transmission connection hole is greater than the height of the transmission connector and the height of the transmission column head, respectively.

[0009] As a further embodiment, the connecting screw includes a long screw and a short screw. The long screw passes through the transmission connecting hole and the through hole and then connects to the connecting screw hole; the short screw passes through the transmission connecting hole and then connects to the connecting screw hole.

[0010] As a further embodiment, a first annular boss is provided between the nut and the screw of the short screw, and a first groove is provided in the transmission connector corresponding to the first annular boss.

[0011] As a further embodiment, a second annular boss is provided between the nut and the screw of the long screw, and a second groove is provided on the transmission column head corresponding to the first annular boss.

[0012] As a further embodiment, a smooth section is provided between the screw rod of the long screw and the second annular boss corresponding to the through hole.

[0013] As a further embodiment, the top edge of the transmission column and the bottom edge of the transmission sleeve cavity are chamfered.

[0014] The beneficial effects of this utility model are as follows: The support arm and the shim sleeve of this utility model are set separately. It can be disconnected from the shim sleeve and connected to the damping shaft transmission to reduce its installation space and is suitable for use in narrow door frames. When the installation position allows, the shim sleeve can be added for installation, making it more widely applicable. Attached Figure Description

[0015] Figure 1 This is an exploded structural diagram of the first embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the angle structure of the shim sleeve in this utility model.

[0017] Figure 3 for Figure 2 Another structural diagram from a different angle.

[0018] Figure 4 for Figure 1 Another structural diagram from a different angle.

[0019] Figure 5 This is a schematic diagram of the structure of the support arm and door closer after being raised and combined.

[0020] Figure 6 This is a schematic diagram of the structure of the support arm of this utility model after being directly combined with the door closer.

[0021] Figure 7 for Figure 5 Top view of the structure.

[0022] Figure 8 for Figure 7 A schematic diagram of the CC cross-section structure.

[0023] Figure 9 for Figure 6 A cross-sectional structural diagram of the combination method.

[0024] Figure 10 This is a top view schematic diagram of the support arm structure of this utility model.

[0025] Figure 11 This is a schematic diagram of an angled support arm structure in the existing technology.

[0026] Figure 12 for Figure 11 Another structural diagram from a different angle. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments: See Figure 1 The assembly of parts for the middle B arrowhead, Figure 4 The assembly of parts for the middle B arrowhead, Figure 2 , Figure 3 , Figure 6 and Figure 9 As shown, a door closer arm connection structure includes an arm 1 and a connecting screw. The door closer 2 is provided with a damping shaft 21. The end of the damping shaft 21 extends out of the housing of the door closer 2 and is provided with a transmission connector 211. The end face of the transmission connector 211 is provided with a connecting screw hole 212. One end of the arm 1 is provided with a transmission connection hole 11 that is adapted to the transmission connector 211. The transmission connection hole 11 is directly sleeved with the transmission connector 211 to achieve circumferential transmission. The connecting screw passes through the transmission connection hole 11 and connects with the connecting screw hole 212.

[0028] Or see Figure 1 The assembly of parts for the arrow A in the middle, Figure 4 The assembly of parts for the arrow A in the middle, Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, the transmission connection hole 11 is connected to the transmission connector 211 through the shim sleeve 3. The two ends of the shim sleeve 3 are respectively provided with a transmission pin 32 and a transmission sleeve cavity 35 corresponding to the transmission connection hole 11 and the transmission connector 211. The center of the transmission pin 32 is also provided with a through hole 34 corresponding to the connecting screw. The through hole 34 extends from the end face of the transmission pin 32 to the inner end face of the transmission sleeve cavity 35. The transmission pin 32 and the transmission sleeve cavity 35 are respectively sleeved with the transmission connection hole 11 and the transmission connector 211 to achieve mutual circumferential transmission cooperation. After the connecting screw passes through the transmission connection hole 11 and the through hole 34, it is connected to the connecting screw hole 212.

[0029] The cross-sections of the transmission connector 211, the transmission connection hole 11, the transmission column head 32, and the transmission sleeve cavity 35 are all square.

[0030] Combination Figure 10 As shown, the wall surface of the transmission connection hole 11 is inclined relative to the long side L of the support arm 1.

[0031] The shim sleeve 3 includes a column body 31, the top surface of which protrudes to form the transmission head 32, and the bottom surface of the column body 31 is recessed upward to form the transmission sleeve cavity 35.

[0032] The depth D1 of the transmission connection hole 11 is greater than the height D3 of the transmission connector 211 and the height D2 of the transmission column head 32.

[0033] The connecting screws include a long screw 4 and a short screw 5. The long screw 4 passes through the transmission connecting hole 11 and the through hole 34 and is connected to the connecting screw hole 212. The short screw 5 passes through the transmission connecting hole 11 and is connected to the connecting screw hole 212.

[0034] The short screw 5 has a first annular boss 51 between the nut and the screw rod, and the transmission connector 211 has a first groove 213 corresponding to the first annular boss 51.

[0035] The long screw 4 has a second annular boss 41 between the nut and the screw rod, and the transmission column head 32 has a second groove 33 corresponding to the second annular boss 41.

[0036] The long screw 4 has a smooth section between its screw rod and the second annular boss 41, corresponding to the through hole 34, which is not shown in the figure.

[0037] The top edge of the transmission column head 32 and the bottom edge of the transmission sleeve cavity 35 are chamfered.

[0038] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A support arm connection structure for a door closer, comprising a support arm (1) and connecting screws, wherein the door closer (2) is provided with a damping shaft (21), the end of which extends out of the housing of the door closer (2) and is provided with a transmission connector (211), the end face of which is provided with a connecting screw hole (212); characterized in that: One end of the support arm (1) is provided with a transmission connection hole (11) adapted to the transmission connector (211). The transmission connection hole (11) is directly sleeved with the transmission connector (211) to achieve circumferential transmission. The connecting screw passes through the transmission connection hole (11) and connects with the connecting screw hole (212); or, the transmission connection hole (11) is connected to the transmission connector (211) through a shim sleeve (3). The two ends of the shim sleeve (3) are respectively provided with the transmission connection hole (11) and the transmission connector (211). There are matching transmission head (32) and transmission sleeve cavity (35). The center of the transmission head (32) is also provided with a through hole (34) corresponding to the connecting screw. The through hole (34) leads from the end face of the transmission head (32) to the inner end face of the transmission sleeve cavity (35). The transmission head (32) and the transmission sleeve cavity (35) are respectively sleeved with the transmission connection hole (11) and the transmission connection head (211) to achieve mutual circumferential transmission cooperation. After the connecting screw passes through the transmission connection hole (11) and the through hole (34), it is connected to the connecting screw hole (212).

2. The support arm connection structure of the door closer according to claim 1, characterized in that: The cross-sections of the transmission connector (211), the transmission connection hole (11), the transmission column (32), and the transmission sleeve cavity (35) are all square.

3. The support arm connection structure of the door closer according to claim 1, characterized in that: The wall of the transmission connection hole (11) is inclined relative to the long side (L) of the support arm (1).

4. The support arm connection structure of the door closer according to claim 1, characterized in that: The shim sleeve (3) includes a column body (31), the top surface of the column body (31) protrudes to provide the transmission head (32), and the bottom surface of the column body (31) is recessed upward to form the transmission sleeve cavity (35).

5. The support arm connection structure of the door closer according to claim 1, characterized in that: The depth of the transmission connection hole (11) is greater than the height of the transmission connector (211) and the height of the transmission column (32).

6. The support arm connection structure of the door closer according to claim 1, characterized in that: The connecting screws include a long screw (4) and a short screw (5). The long screw (4) passes through the transmission connecting hole (11) and the through hole (34) and is connected to the connecting screw hole (212). The short screw (5) passes through the transmission connecting hole (11) and is connected to the connecting screw hole (212).

7. The support arm connection structure of the door closer according to claim 6, characterized in that: The short screw (5) has a first annular boss (51) between the nut and the screw rod, and the transmission connector (211) has a first groove (213) corresponding to the first annular boss (51).

8. The support arm connection structure of the door closer according to claim 6, characterized in that: The long screw (4) has a second annular boss (41) between the nut and the screw rod, and the transmission head (32) has a second groove (33) corresponding to the second annular boss (41).

9. The support arm connection structure of the door closer according to claim 8, characterized in that: The long screw (4) has a smooth section between the screw rod and the second annular boss (41) corresponding to the through hole (34).

10. The support arm connection structure of the door closer according to claim 1, characterized in that: The top edge of the transmission column (32) and the bottom edge of the transmission sleeve (35) are chamfered.

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