An axle-core type door closing device

Abstract

An axle-core type door closing device for adapting to a side-hung door, characterized in that it comprises: a main body having an axle-core cavity and a piston cavity arranged in an intersecting manner; an axle-core pivotally connected to the axle-core cavity, and a cam-type component is provided on the outer periphery of the axle-core at the intersection of the axle-core and the piston cavity; a piston, the piston includes a first piston and a second piston which are located on the same side of the axle-core and coaxially arranged, the first piston penetrates through the piston cavity, and the first piston has a first piston inner cavity axially penetrating therethrough for the second piston to pass through; elastic components are provided at the ends of the first piston and the second piston away from the axle-core, so that the first piston and the second piston elastically abut against the cam-type component; the main body is installed at a fixed position outside the side-hung door, and one end of the axle-core close to the side-hung door is connected to the side-hung door; or: the main body is installed on the side-hung door, and one end of the axle-core away from the side-hung door is connected to a fixed position outside the side-hung door.

Description

Technical Field

[0001] The present invention relates to the field of door closing devices, and more particularly to an axle core type door closing device. Background Art

[0002] In the existing axle core type door closing device, the closing piston and the damping piston are located on both sides of the axle core. For the main body for installing the axle core of this structure, spaces for accommodating the pistons need to be provided on both sides where the axle core is pivotally connected. When installing this axle core type door closing device, the spaces occupied by the main bodies of the pistons accommodated on both sides of the axle core make it inconvenient to install the axle core close to the door frame; after the door rotates to the open state based on the axle core, the opening width of the door will be reduced compared to the width of the door frame, making the side-hung door using this door closing device not space-saving enough. When the width of the door frame is limited, it affects the user's access. Summary of the Invention

[0003] The purpose of the present invention is to solve the above deficiencies of the prior art and provide an axle core type door closing device.

[0004] To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0005] An axle core type door closing device for adapting to a side-hung door, comprising: a main body having an axle core cavity and a piston cavity arranged in an intersecting manner; an axle core pivotally connected to the axle core cavity, and a cam-like component is provided on the outer periphery of the axle core at the intersection of the axle core and the piston cavity; a piston, the piston comprising a first piston and a second piston which are coaxially arranged on the same side of the axle core, the first piston passes through the piston cavity, and the first piston has a first piston inner cavity axially penetrating for the second piston to pass through; elastic components are provided at the ends of the first piston and the second piston away from the axle core, so that the first piston and the second piston elastically abut against the cam-like component; the main body is installed at a fixed position outside the side-hung door, and one end of the axle core close to the side-hung door is connected to the side-hung door; or: the main body is installed on the side-hung door, and one end of the axle core away from the side-hung door is connected to a fixed position outside the side-hung door.

[0006] Preferably, the cam-like component includes a first cam-like component and a second cam-like component arranged at intervals along the axial direction of the axle core, the first cam-like component includes a first resilient portion and first lifting portions arranged at a preset angle interval on both sides of the first resilient portion; when the side-hung door is in the closed state, the first piston elastically abuts against the first resilient portion.

[0007] Preferably, the second cam component includes a second lifting portion and second rebound portions located on both sides of the second lifting portion and spaced from the second lifting portion by a preset angle; when the swing door is in a closed state, the second piston elastically abuts against the second lifting portion.

[0008] Preferably, the shaft core is provided with a first pivoting portion and a second pivoting portion pivotally connected to the main body.

[0009] Preferably, the first piston is cylindrical in shape, and the elastic component includes a spring abutting between the first piston and the main body.

[0010] Preferably, the first piston is further provided with a avoidance hole opened along its radial direction, the shaft core passes through the avoidance hole, and the inner wall of one side of the avoidance hole elastically abuts against the first cam component provided on the outer periphery of the shaft core under the action of the spring.

[0011] Preferably, a sliding block is provided between the second piston and the second cam component, a sliding groove matching the sliding block is provided in the inner cavity of the first piston, and a flat portion is provided on the outer periphery of the first piston, and the flat portion is clamped to the main body.

[0012] Preferably, the second piston comprises a piston rod housing and a piston rod elastically connected to the piston rod housing, the piston rod housing is connected to the main body, one end of the piston rod is inserted into the first piston cavity to elastically abut the slider against the second cam component.

[0013] Preferably, the piston rod housing is installed in the piston cavity. The piston rod housing is different from the piston rod housing in that one end of the piston rod abuts the main body. The piston rod housing is provided with one end of the piston rod abutting the elastic component, and the piston rod passes through the inner ring of the elastic component and is inserted into the first piston cavity.

[0014] Preferably, an opening is provided at one end of the piston cavity away from the intersection with the axial core cavity, and the piston rod housing is connected to the main body at the opening. The cross-sectional shape of the piston rod housing is consistent with that of the main body, and the piston rod housing is provided with one end of the piston rod abutting the elastic component, and the piston rod passes through the inner ring of the elastic component and is inserted into the first piston cavity.

[0015] The beneficial effect of the present invention is to provide an axis-core door closing device for adapting to a swing door, comprising: a main body, the main body having an axis-core cavity and a piston cavity arranged in an intersecting manner; an axis, pivotally connected to the axis-core cavity, the outer periphery of the axis is provided with a cam-type component at the intersection of the axis-core and the piston cavity; a piston, the piston comprising a first piston and a second piston located on the same side of the axis and coaxially arranged, the first piston being inserted into the piston cavity, the first piston having an axially penetrating first piston inner cavity for the second piston to pass through; an elastic component is provided at one end of the first piston and the second piston away from the axis, so that the first piston and the second piston elastically abut against the cam-type component; the main body is installed at a fixed position outside the swing door, and the end of the axis close to the swing door is connected to the swing door; or: the main body is installed on the swing door, and the end of the axis away from the swing door is connected to a fixed position outside the swing door. The above structure enables the door closing piston and the damping piston to be located on the same side of the shaft core, so that the shaft core is installed close to the door frame. The width of the door using this door closing device is increased after it is opened for users to enter and exit, making it convenient for users to enter and exit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the installation of the axial core type door closing device according to embodiment 1 of the present invention.

[0018] Figure 2 This is a schematic diagram of the installation of the shaft-type door closing device of Example 1 of the present invention. Figure 2 .

[0019] Figure 3 It is a schematic diagram of the overall structure of the shaft-core type door closing device according to Example 1 of the present invention.

[0020] Figure 4 It is a schematic exploded view of the overall structure of the axial core type door closing device according to embodiment 1 of the present invention.

[0021] Figure 5 It is a cross-sectional schematic diagram of the shaft-core type door closing device according to embodiment 1 of the present invention.

[0022] Figure 6 It is a schematic diagram of the overall structure of the shaft core of Example 1 of the present invention.

[0023] Figure 7 It is a schematic diagram of the overall structure of the first piston of Example 2 of the present invention.

[0024] Figure 8 It is a schematic exploded view of the overall structure of the axial core type door closing device according to embodiment 3 of the present invention.

[0025] Figure 9It is a schematic diagram of the overall structure of the first piston of Example 4 of the present invention.

[0026] Figure 10 It is a schematic exploded view of the overall structure of the axial core type door closing device according to embodiment 5 of the present invention.

[0027] Figure 11 It is a schematic diagram of the overall structure of the first piston of Example 6 of the present invention.

[0028] Description of Reference Numerals

[0029] Number Name Number Name 11 Door 26 Bearing 12 Door frame 3 Shaft core 2 Main body 31 First cam-type component 21 Shaft core cavity 311 First jacking part 22 Piston cavity 312 First resilient part 23 First piston 32 Second cam-type component 231 Avoidance hole 321 Second jacking part 232 Flat position 322 Second resilient part 233 Avoidance groove 33 First pivot part 24 Inner cavity of the first piston 34 Second pivot part 241 Sliding groove 4 Spring 25 Second piston 5 Slider 251 Piston rod 6 Mounting bracket 252 Piston rod housing DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0034] Example 1

[0035] refer to Figures 1 to 6 As shown, a shaft core type door closing device is used to adapt to a swing door, comprising:

[0036] The main body 2 is installed at a fixed position other than the side-hung door 11. In this embodiment, the main body 2 is installed on the door frame 12. The main body 2 has an axis core cavity 21 and a piston cavity 22 arranged in a T-shaped intersection;

[0037] A piston, the piston includes a first piston 23 disposed through the piston cavity 22. The first piston has a first piston inner cavity 24 axially penetrating therethrough, and a second piston 25 is disposed through the first piston inner cavity;

[0038] An axis core 3, one end of which is pivotally connected to the axis core cavity 21, and the other end is exposed outside the main body 2 for connection with the side-hung door 11. The cross-section of the end of the axis core 3 exposed outside the main body 2 is rectangular to facilitate the connection between the axis core 3 and the door 11. A first cam-like component 31 and a second cam-like component 32 are provided on the outer periphery of the axis core 3 at the intersection of the axis core 3 and the piston cavity 22. The first cam-like component 31 and the second cam-like component 32 are arranged at intervals along the axial direction of the axis core 3;

[0039] Elastic components are provided at the ends of the first piston 23 and the second piston 25 away from the axis core 3, so that the other end of the first piston 23 elastically abuts against the first cam-like component 31, and the other end of the second piston 25 elastically abuts against the second cam-like component 32. In this embodiment, the outer shape of the first piston 23 is cylindrical, and the elastic component includes a spring 4 abutted between the first piston 23 and the main body.

[0040] In this embodiment, mounting brackets 6 are provided at both ends of the main body 2. The mounting brackets 6 are provided with threaded through holes, and the shape and structure of the mounting brackets 6 can be adapted according to the position where this axis-core type door closer is installed.

[0041] In this embodiment, the first cam-type component 31 includes a first rebound portion 312 and a first lifting portion 311 located on both sides of the first rebound portion 312 and spaced 90° from the first rebound portion. When the swing door 11 is in a closed state, the first piston 23 elastically abuts against the first rebound portion 312. The diameter of the first rebound portion 312 is smaller than that of the first lifting portion 311. The first rebound portion 312 and the first lifting portion 311 are connected by an arc transition. The first rebound portion 312 and the first lifting portion 311 both include a stop plane in contact with the first piston surface. The second cam-type component includes a second lifting portion 321 and a second lifting portion 321 located on both sides of the second lifting portion 321 and spaced 90° from the second lifting portion 321. The rebound portion is arranged at 90 degrees, and when the casement door 11 is in a closed state, the second piston 25 elastically abuts against the second lifting portion 321, and the diameter of the second rebound portion 322 is smaller than the second lifting portion 321; the above structure can achieve the following effects: when the casement door 11 is opened inward or outward from a closed state to 90°, the force of the first piston 23 elastically abutting against the first cam component 31 gradually increases, and the force of the second piston 25 elastically abutting against the second cam component 32 gradually decreases; the first rebound portion 312 and the first lifting portion 311 both include a stop plane in contact with the first piston surface, which can achieve the effect of maintaining the current state when the door 11 is in a closed state or an open state.

[0042] In this embodiment, the shaft core 3 is provided with a first pivot portion 33 and a second pivot portion 34 pivotally connected to the main body 2, and two first cam-type components 31 are provided between the first pivot portion 33 and the second pivot portion 34 along the axial direction of the shaft core 3, and a second cam-type component 32 is provided between the two first cam-type components 31. Accordingly, the main body 2 is provided with a bearing 26 corresponding to the position of the first pivot portion 33 and the second pivot portion 34, which is used to pivot the shaft core 3.

[0043] In this embodiment, the first piston 23 is further provided with a avoidance hole 231 opened along its radial direction, the shaft core 3 passes through the avoidance hole 231, and the inner wall of one side of the avoidance hole elastically abuts against the first cam component 31 provided on the outer periphery of the shaft core 3 under the action of the spring 4.

[0044] In this embodiment, a slider 5 is further provided between the second piston 25 and the second cam component 32, the first piston inner cavity 24 is provided with a slide groove 241 matching the slider 5, and the outer periphery of the first piston 23 is further provided with a flat position 232, and the flat position 232 is clamped to the main body. The purpose of setting the flat position 232 is to prevent the first piston 23 from rotating in the piston cavity 22, causing the angle of contact between the slider 5 and the second cam component 32 to change, thereby causing the slider 5 to get stuck with the shaft core 3.

[0045] In this embodiment, the second piston 25 includes a piston rod housing 252 and a piston rod 251 elastically connected to the piston rod housing 252. The piston rod housing 252 is connected to the main body 2 through a thread. One end of the piston rod 251 is inserted into the first piston inner cavity 24 to elastically abut the slider against the second cam component 32. As a preferred embodiment, the second piston 25 can use a damper to realize its function. The damper is a common accessory in this field and its structure is not described in detail.

[0046] In this embodiment, an opening is provided at the end of the piston cavity 22 away from the intersection with the shaft core cavity 21, and the piston rod housing 252 is connected to the main body 2 at the opening by a thread. The piston rod housing 252 has the same cross-sectional shape as the main body 2, so that the piston rod housing 252 serves as an end cover at the opening of the piston cavity 22. The piston rod housing 252 is provided with one end of the piston rod 251 abutting the spring 4, and the piston rod 251 passes through the inner ring of the spring 4 and is inserted into the first piston cavity 24 to elastically abut the slider 5 against the second cam component 32.

[0047] Example 2

[0048] refer to Figure 7 As shown, an axis-type door closing device is used to adapt to a swing door. The difference from Example 1 is that in this embodiment, a slider 5 is not provided, and accordingly, a slide groove is not required to be provided in the first piston cavity 24, and the piston rod 251 directly abuts against the axis core 3.

[0049] Example 3

[0050] refer to Figure 8 As shown, an axis-type door closing device is used to adapt to a swing door. The difference from Example 2 is that in this embodiment, the first piston 23 is not provided with an avoidance hole 231, and the end of the first piston 23 directly abuts against the axis core 3.

[0051] Example 4

[0052] refer to Figure 9 As shown, an axis-type door closing device is used to adapt to a swing door. The difference from Example 3 is that, in this embodiment, an end of the first piston 23 abutting the axis 3 is provided with a avoidance groove 233. The purpose of the avoidance setting is to allow the second lifting part 321 provided on the second cam component 32 on the axis 3 to have a larger movement space.

[0053] Example 5

[0054] refer to Figure 10As shown, an axle-core type door closing device is used to adapt to a side-hung door. Different from Embodiment 1, in this embodiment, the cam-type component does not include the first cam-type component and the second cam-type component.

[0055] Embodiment 6

[0056] Reference Figure 11 As shown, an axle-core type door closing device is used to adapt to a side-hung door. Different from Embodiment 5, in this embodiment, the first piston 23 is not provided with an avoidance hole 231, and the end of the first piston 23 directly abuts against the axle core 3.

[0057] In Embodiment 1, the main body 2 is installed on the door frame 12. This is just one implementation manner. The main body 2 can also be installed at a fixed position other than the door 11. For example, an avoidance groove is opened on the ground to install the main body 2.

[0058] In Embodiment 1, the piston rod housing 252 is connected to the main body 2 by a thread. This is just one implementation manner. The piston rod housing 252 can also be connected to the main body 2 by other common fixing structures in the art such as snap connection.

[0059] In Embodiment 1, the axle core 3 is pivotally connected to the main body 2 through a bearing 26 provided on the main body 2. This is just one implementation manner. The axle core 3 can also be pivotally connected to the main body 2 through a bushing or other common pivotal connection structures provided on the main body 2.

[0060] In Embodiment 1, the piston rod housing 252 can also be installed in the piston chamber 22. One end of the piston chamber 22 with an opening has an end cover (not shown in the figure). The end of the piston rod housing 252 different from the end provided with the piston rod 251 abuts against the end cover provided on the main body 2. The end of the piston rod housing 252 provided with the piston rod 251 abuts against the spring 4. The piston rod 251 passes through the inner ring of the spring 4 and inserts into the inner cavity 24 of the first piston to elastically abut the slider 5 against the second cam-type component 32.

[0061] In the description of this specification, the description of reference terms such as "one implementation manner", "some implementation manners", "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0062] The above content is a further detailed description of the present invention in combination with specific implementation manners, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made.

Claims

1. A shaft-type door closing device, used for adapting to a swing door, characterized in that: include: A main body, wherein the main body has a shaft core cavity and a piston cavity which are arranged in an intersecting manner; An axis core is pivotally connected to the axis core cavity, and a cam-type component is provided on the outer periphery of the axis core at the intersection of the axis core and the piston cavity; A piston, the piston comprising a first piston and a second piston located on the same side of the shaft core and coaxially arranged, the first piston being arranged in the piston cavity, the first piston having an axially penetrating first piston inner cavity for the second piston to pass through; An elastic component is provided at one end of the first piston and the second piston away from the shaft core, so that the first piston and the second piston are elastically abutted against the cam component; The main body is installed at a fixed position outside the casement door, and the end of the shaft core close to the casement door is connected to the casement door; or: the main body is installed at the casement door, and the end of the shaft core away from the casement door is connected to a fixed position outside the casement door; The cam component comprises a first cam component and a second cam component arranged at intervals along the axial direction of the shaft core, the first cam component comprises a first rebound portion and a first lifting portion located on both sides of the first rebound portion and arranged at a preset angle from the first rebound portion; when the casement door is in a closed state, the first piston elastically abuts against the first rebound portion; The second cam component includes a second lifting portion and second rebound portions located on both sides of the second lifting portion and spaced from the second lifting portion by a preset angle; when the swing door is in a closed state, the second piston elastically abuts against the second lifting portion.

2. The core shaft type door closing device according to claim 1, wherein The shaft core is provided with a first pivoting portion and a second pivoting portion pivotally connected to the main body.

3. The core-axis type door closing device according to claim 1, wherein, The first piston has a columnar shape, and the elastic component includes a spring abutting between the first piston and the main body.

4. The core shaft type door closing device according to claim 3, characterized in that, The first piston is also provided with a avoidance hole opened along its radial direction, the shaft core passes through the avoidance hole, and the inner wall of one side of the avoidance hole elastically abuts against the first cam component provided on the outer periphery of the shaft core under the action of the spring.

5. The core shaft type door closing device according to claim 1, wherein, A sliding block is further provided between the second piston and the second cam-type component, a sliding groove matching the sliding block is provided in the inner cavity of the first piston, and a flat portion is further provided on the outer periphery of the first piston, and the flat portion is clamped on the main body.

6. The core shaft type door closing device according to claim 5, wherein, The second piston includes a piston rod housing and a piston rod elastically connected to the piston rod housing. The piston rod housing is connected to the main body. One end of the piston rod is inserted into the first piston cavity to elastically abut the slider against the second cam component.

7. The core shaft type door closing device according to claim 6, characterized in that, The piston rod housing is installed in the piston cavity. The piston rod housing is different from the piston rod housing in that one end of the piston rod is abutted against the main body. The piston rod housing is provided with one end of the piston rod abutting against the elastic component, and the piston rod passes through the inner ring of the elastic component and is inserted into the first piston cavity.

8. The core shaft type door closing device according to claim 6, characterized in that, One end of the piston cavity far from the intersection with the shaft core cavity is provided with an opening, the piston rod housing is connected to the main body at the opening, the cross-sectional shapes of the piston rod housing and the main body are the same, one end of the piston rod housing where the piston rod is provided abuts against the elastic member, and the piston rod passes through the inner ring of the elastic member and is inserted into the first piston inner cavity.

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