Expansion integrated hand zipper wheel assembly

Abstract

The utility model provides an expansion integrated type hand-pull chain wheel assembly which comprises a cover cap (11), a hand-pull chain wheel (2), a motor and a chain pressing plate (3). The top end of the cover cap (11) is provided with a screw assembling boss (13) and a coil abutting portion (14) in a stamping mode. The cover cap (11) is fixedly provided with an iron core (12); the top end of the iron core extends out of the cover cap (11), the height of the exceeding part of the iron core is lower than that of the screw assembling boss (13), and a buckling groove (17) is formed in the top end of the exceeding part of the iron core; the iron core extends in the axial direction and plays a role in guiding the length of the motor, so that off-axis movement of the motor in the operation process is prevented. The hand zipper wheel (2) is provided with a first wheel sheet and a second wheel sheet, the first wheel sheet (21) is provided with an assembling groove (211), and the second wheel sheet (22) is provided with an assembling protrusion (221); the assembling grooves (211) are matched with the assembling protrusions (221), so that the assembling protrusions (221) extend into and are assembled in the assembling grooves (211), and stable installation is formed.

Description

Technical Field

[0001] The utility model relates to the field of rolling shutter door motors, and in particular to a matching assembly of a hand-pulled sprocket wheel and an electromagnet (1) of a rolling shutter door. Background Art

[0002] In the field of application of this utility model, application No. 201610404938.9, "A brake device for electric rolling door machines," discloses a solution in which two discs are stamped and assembled to form a hand sprocket (hereinafter referred to as a "two-piece hand sprocket"). This solution has obvious cost advantages over traditional casting, but it also has the following problems, resulting in the hand sprocket being unable to stably control the stopping or upward and downward movement of the door body:

[0003] The thickness of the disc body is limited, which makes it impossible for the chain pressure plate to accurately extend into the slot of the hand sprocket. Especially when it is mistakenly stuck in other positions, interference often occurs, making it impossible for the chain pressure plate to escape from the braking state.

[0004] The thickness of the disc body is limited, resulting in a very small matching stroke between the chain pressure plate and the slot of the hand sprocket, which often leads to disjointness, that is, the braking target cannot be achieved.

[0005] The core and cover of a traditional electromagnet are typically integrally formed by casting. While a stamped cover followed by the core installation would undoubtedly offer significant cost advantages, this approach, like a two-piece hand sprocket, suffers from practical limitations. For example, the electromagnet cover typically requires increased wall thickness to ensure sufficient clearance for screw installation. This approach is difficult to control due to high screw length accuracy requirements and high drilling and tapping costs. Summary of the Invention

[0006] In this context, the present invention aims to provide a hand sprocket assembly that can overcome the problem that a two-piece hand sprocket is easily dislodged or accidentally touched during hand braking, and thus cannot stably brake or drive the door up and down;

[0007] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0008] An expanded integrated hand sprocket assembly, comprising: a cover (11), a hand sprocket (2), and a chain pressing plate (3); an iron core mounting hole (111) is provided on the inner bottom surface of the cover (11); the top end of the iron core (12) passes through the iron core mounting hole (111) of the cover (11), and the protruding portion is lower than the screw assembly boss (13) of the cover (11); the cover is provided with two or more anti-deflection protrusions (16), which can form a guiding length for the motor shaft after the motor is installed, thereby preventing the motor from deflecting during operation. The iron core extends axially to the inner bottom surface of the cover (11); the inner bottom surface of the cover (11) is provided with at least one screw assembly boss (13) and one or more coil support parts (14); the coil is arranged in the cover (11) and is mounted on the iron core and is supported against the coil support part (14); the screw assembly boss (13) and the coil support part (14) are not in the same plane, so that the coil will not contact the screw mounting hole in the screw assembly boss (13) after installation, thereby forming a surplus length sufficient for screw installation.

[0009] The hand chain wheel (2) is provided with a first wheel piece (21) and a second wheel piece (22); a space is formed on the top surface of the first wheel piece by a stamping protrusion, and an assembly groove (211) is provided; the second wheel piece is provided with an assembly protrusion (221); the assembly groove (211) matches the assembly protrusion (221), so that the assembly protrusion (221) extends into and is assembled in the assembly groove (211); the assembly protrusion (221) is stamped so that the assembly protrusion (221) expands outward in multiple directions, so that the assembly protrusion (221) cannot be separated from the assembly groove (211) after installation, forming a stable fit.

[0010] The iron core (12) extends axially to the inner bottom surface of the cover (11); the bottom surface of the cover (11) is provided with at least one screw assembly boss (13) and one or more coil support parts (14), and the screw assembly boss (13) is provided with a screw assembly hole (15); the coil is arranged in the cover (11) and is mounted on the iron core and is supported against the coil support part (14); the screw assembly boss (13) and the coil support part (14) are not in the same plane, so that the coil cannot contact the screw assembly hole (15).

[0011] The hand sprocket (2) is circumferentially provided with a wide groove and a narrow groove for assembling a chain; the wide groove is provided with an anti-misalignment transverse plate (2a) and / or an anti-slip longitudinal plate (2b), which enables the chain pressure plate (3) to have a more precise braking effect during braking without causing any slippage or mechanical interference.

[0012] The chain pressing plate (3) is provided with a bending layer (31), and the bending layer is provided with more than one layer; during the braking process of the chain pressing plate (3), the bending layer will penetrate into the wide groove to brake the chain in the wide groove; and the multi-layer bending portion is to increase the thickness of the bending layer so that the chain pressing plate (3) will not be separated from the wide groove during the process of the chain pressing plate (3) braking the chain.

[0013] 1. The utility model provides an anti-error horizontal plate and / or an anti-slip vertical plate on a two-piece hand chain wheel by stamping; wherein the anti-error horizontal plate prevents the chain pressing plate (3) from being stuck in the gap between the first wheel plate (21) and the second wheel plate (22) and causing mechanical interference, resulting in the chain pressing plate (3) being unable to return normally; and the anti-slip vertical plate prevents the chain pressing plate (3) from being separated from the slot during braking, thereby achieving the purpose of stable braking / stopping;

[0014] 2. The utility model provides a first wheel piece and a second wheel piece of a hand sprocket with an assembly groove (211) and an assembly protrusion (221), respectively; the assembly protrusion (221) is provided with a stamping expansion position (222) in the form of a stamping, and after the assembly groove (211) and the assembly protrusion (221) are matched, the assembly protrusion (221) is expanded outward / circumferentially, so that the assembly protrusion (221) cannot be separated from the assembly groove (211), thereby achieving the technical purpose of efficient and stable assembly of the hand sprocket;

[0015] 3. The cover (11) and the iron core (12) of the utility model are prepared as two components separately and then assembled, so that the cover (11) can be formed by stamping, thereby greatly reducing the preparation cost; it is also convenient for the cover (11) and the iron core (12) to use different materials, such as: it is convenient for the iron core (12) to use a suitable material to increase the magnetic flux of the electromagnet (1), and the cover (11) to use an economical material to protect the coil and realize other functions.

[0016] 4. The utility model is provided with at least one screw assembly boss (13) and one or more coil support parts (14) on the cover (11), and the screw assembly boss (13) and the coil support part (14) are not in the same plane. Since there is a certain gap between the mounting hole of the coil and the screw assembly boss (13), the screw is allowed to pass through the mounting hole and leak out a certain length, thereby greatly reducing the requirements for the screw length accuracy (tolerance); at the same time, it also avoids drilling and tapping the iron core, thereby greatly reducing the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 (1) and (2) are schematic diagrams of the top and bottom of the cover of Example 1;

[0018] Figure 2(1) and (2) are schematic diagrams of the hand sprocket of Example 1 from two angles: top and bottom;

[0019] Figure 3 This is a schematic diagram of the chain pressing plate in Example 1;

[0020] Figure 4 This is a schematic diagram of the multi-layer bending of the bending layer of the pressure chain plate in Example 2;

[0021] Figure 5 This is another installation diagram of the anti-mistake horizontal plate and the anti-slip vertical plate of the hand sprocket in Example 3;

[0022] Figure 6 (1) and (2) are schematic diagrams of the disassembly of the cover screw assembly boss and the iron core in another form in Example 4;

[0023] Figure 7 This is a schematic diagram of the one-piece molding of the hand sprocket in Example 5. DETAILED DESCRIPTION Example 1

[0024] like Figure 1 (1) and (2), Figure 2 (1) and (2), Figure 3 、 Figure 4 as well as Figure 5 The expanded integrated hand sprocket assembly shown includes an electromagnet 1, a hand sprocket 2, a motor, and a chain pressure plate 3; the electromagnet 1 includes a coil, a cover 11, and an iron core 12.

[0025] The inner bottom surface of the cover 11 is provided with three screw assembly bosses 13 and three coil support parts 14; the coil is arranged in the cover 11 and is mounted on the iron core and rests on the coil support parts 14; the screw assembly bosses 13 and the coil support parts 14 are not in the same plane, so that the coil cannot contact the screw assembly holes 15.

[0026] The cover 11 is provided with three anti-deflection protrusions 16 , and the anti-deflection protrusions 16 are provided on the screw assembly bosses 13 .

[0027] The inner bottom surface of the cover 11 is provided with an iron core mounting hole 111 , and the top end of the iron core 12 passes through the iron core mounting hole 111 of the cover 11 , and the protruding portion is lower than the screw assembly boss 13 of the cover 11 .

[0028] The iron core 12 extends axially to the inner bottom surface of the cover 11; the bottom surface of the cover 11 is provided with at least one screw assembly boss 13 and one or more coil support parts 14, and the screw assembly boss 13 is provided with a screw assembly hole 15; the coil is arranged in the cover 11 and is mounted on the iron core and rests on the coil support part 14; the screw assembly boss 13 and the coil support part 14 are not in the same plane, so that the coil cannot contact the screw assembly hole 15.

[0029] The hand sprocket 2 is provided with a first wheel piece 21 and a second wheel piece 22; a groove space is formed in the middle of the first wheel piece by stamping, and an assembly groove 211 is provided at the bottom of the groove; the second wheel piece is sheet-shaped and provided with an assembly protrusion 221; the assembly groove 211 matches the assembly protrusion 221, so that the assembly protrusion 221 is extended into and assembled in the assembly groove 211; the assembly protrusion 221 is stamped to expand outward, so that the assembly protrusion 221 cannot be separated from the assembly groove 211 after installation, forming a stable fit.

[0030] The hand sprocket 2 is circumferentially provided with wide and narrow grooves for assembling the chain; the wide groove is provided with an anti-error transverse plate 2a and an anti-slip longitudinal plate 2b, which can improve the braking effect of the chain pressure plate 3 during the braking process and prevent it from slipping off. Example 2

[0031] like Figure 4 As shown, in an expanded integrated hand sprocket assembly described in Example 1, "the wide groove is provided with an anti-error horizontal plate 2a and an anti-slip longitudinal plate 2b" is replaced by the following scheme: the chain pressure plate 3 is provided with two or more layers of bending layers 31, and the multi-layer bending part is to cooperate with the wide groove by increasing the thickness, so as to meet the requirement that the bending layer will not separate from the wide groove when the chain pressure plate 3 brakes the chain. Example 3

[0032] In the expanded integrated hand sprocket assembly described in Example 1, the anti-error horizontal plate 2a is arranged on the first wheel piece of the hand sprocket 2, and the anti-slip vertical plate 2b is arranged on the second wheel piece; it should be noted that: in actual application, the anti-error horizontal plate 2a and the anti-slip vertical plate 2b can also be arranged on the second wheel piece, or on the narrow groove of the hand sprocket, so as to meet different needs. Example 4

[0033] like Figure 6 As shown in (1) and (2), an expanded integrated hand sprocket assembly described in Example 1, the cover 11 is provided with four screw assembly bosses 13; the protruding portion of the iron core 12 is provided with four buckle grooves 17. Example 5

[0034] like Figure 7 As shown, in the expanded integrated hand sprocket assembly described in Example 2, the hand sprocket 2 is replaced by a combination of a first wheel plate and a second wheel plate: the hand sprocket is formed as a whole by casting.

[0035] The purpose and principle of the invention of the utility model is to prevent the chain plate 3 and the hand sprocket from falling out or getting stuck during braking by arranging an anti-error horizontal plate and / or an anti-slip longitudinal plate on the hand sprocket, or by thickening the chain plate by multi-layer bending, so as to improve the defects of traditional products in this regard.

Claims

1. An expanded integrated hand sprocket assembly, characterized by: The hand sprocket assembly comprises: an electromagnet (1), a hand sprocket (2) and a chain pressing plate (3); the electromagnet (1) comprises a cover (11), an iron core (12) and a coil; the hand sprocket (2) is circumferentially provided with a wide groove and a narrow groove for assembling a chain; the wide groove is provided with an anti-misoperation transverse plate (2a) and / or an anti-slip longitudinal plate (2b) of the chain pressing plate (3).

2. The expanded integrated hand sprocket assembly according to claim 1, characterized in that: The hand sprocket wheel (2) comprises a first wheel piece (21) and a second wheel piece (22).

3. The expanded integrated hand sprocket assembly according to claim 2, characterized in that: The first wheel (21) is provided with an assembly groove (211), and the second wheel (22) is provided with an assembly protrusion (221); the assembly groove (211) matches the assembly protrusion (221), so that the assembly protrusion (221) extends into and is assembled in the assembly groove (211); the assembly protrusion (221) is provided with a stamping expansion position (222), so that the assembly protrusion (221) cannot be separated from the assembly groove (211).

4. An expanded integrated hand sprocket assembly according to claim 1, 2 or 3, characterized in that: The iron core (12) extends axially to the inner bottom surface of the cover (11); the bottom surface of the cover (11) is provided with at least one screw assembly boss (13) and one or more coil support parts (14), and the screw assembly boss (13) is provided with a screw assembly hole (15); the coil is arranged in the cover (11) and is mounted on the iron core and is supported against the coil support part (14); the screw assembly boss (13) and the coil support part (14) are not in the same plane, so that the coil cannot contact the screw assembly hole (15).

5. The expanded integrated hand sprocket assembly according to claim 4, characterized in that: An iron core mounting hole (111) is provided on the bottom surface of the cover (11); the top end of the iron core (12) passes through the iron core mounting hole (111) of the cover (11).

6. The expanded integrated hand sprocket assembly according to claim 5, characterized in that: The portion of the iron core (12) that leaks out through the iron core mounting hole (111) is lower than the screw assembly boss (13) of the cover (11).

7. The expanded integrated hand sprocket assembly according to claim 5, characterized in that: The cover (11) is provided with two or more anti-deflection protrusions (16).

8. The expanded integrated hand sprocket assembly according to claim 1, characterized in that: The chain pressing plate (3) is provided with a bending layer (31) for braking the buckled chain, and the bending layer has more than one bending surface.

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