Double-crank transmission mechanism for flying shear

Abstract

The utility model relates to mechanical drive technical field discloses a double-crank transmission mechanism for flying shears, the mechanism includes motor, speed reducer, eccentric wheel and scissors main body, its core is that a set of protective assembly that is covered in the outside of eccentric wheel and the sealing assembly that sets up at its opening and closing place are additionally established, the protective assembly includes two protective shells that are hinged through hinge, and the free end of protective shell is equipped with the along board that extends outward respectively and is fixedly connected through bolt, and the sealing assembly includes the protruding block and the limiting slot that are used for mutual insertion and are arranged on the opening and closing edge of protective shell. Through the above structure combination, the core transmission component eccentric wheel is effectively isolated with the outside harsh environment, can reliably prevent dust and water vapor from invading, fundamentally avoids the wear and tear and corrosion problem of component, significantly improves the stability and reliability of whole transmission mechanism operation, and greatly prolongs its service life, and the overall assembly and disassembly are convenient, and the post-maintenance is favorable.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and in particular to a double crank transmission mechanism for a flying shear machine. Background Technology

[0002] Flying shears are key equipment widely used in industrial production for cutting continuously moving sheets and profiles to a fixed length. In order to achieve the cutting action, flying shears usually use a transmission mechanism to convert the rotational motion of the motor into the reciprocating motion of the shear body. Among them, using an eccentric wheel or crank-connecting rod mechanism is a common and effective technical solution.

[0003] However, these flying shears mostly operate in industrial sites such as steel metallurgy and metal processing, where the working environment is often harsh, with the air often filled with a large amount of dust, metal shavings and other solid particles, and the humidity may be high.

[0004] In existing transmission mechanism designs, the eccentric wheel, as a core power conversion component, and its connected kinematic pairs are usually directly exposed to the environment or only have simple shielding, lacking effective and rigorous protective measures. Therefore, during long-term operation of the equipment, dust and debris in the air can easily penetrate between the rotating and sliding contact surfaces of the eccentric wheel, acting as an abrasive and thus aggravating the wear of the components. This leads to a gradual increase in transmission clearance, affecting the accuracy and stability of the shearing action, and in severe cases, even causing the mechanism to jam or be damaged. At the same time, humid air can also directly contact the surface of these metal components, causing corrosion. Corrosion not only further damages the surface finish of the components and aggravates wear, but also reduces the structural strength of the parts.

[0005] In summary, existing flying shear machine transmission mechanisms generally suffer from short service life, low operational reliability, and frequent maintenance due to wear and corrosion, lacking effective protection for core components. They cannot meet the requirements of modern production for high stability and long service life. Therefore, a double crank transmission mechanism for flying shear machines is proposed to solve the above problems. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a double crank transmission mechanism for flying shears, which aims to improve the problems of existing flying shear transmission mechanisms, which are susceptible to dust wear and moisture corrosion due to the direct exposure of core transmission components (such as eccentric wheels), resulting in decreased transmission accuracy, low operational reliability and short service life.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a double crank transmission mechanism for a flying shear machine, including: a motor, a reduction wheel, an eccentric wheel, and a shear body; as well as a protective assembly disposed outside the eccentric wheel and a sealing assembly disposed at the opening and closing point of the protective assembly.

[0008] The protective assembly includes two protective shells hinged together by a hinge, and the free ends of the two protective shells are respectively provided with edge plates, and the two edge plates are fixedly connected by bolts.

[0009] Furthermore, the sealing assembly includes a limiting groove disposed on one opening edge of the protective shell and a protrusion disposed on the other opening edge of the protective shell, wherein the protrusion and the limiting groove are combined by a plug-in engagement.

[0010] Preferably, the double crank transmission mechanism for the flying shear machine further includes a reduction gearbox, and the reduction wheel is disposed inside the reduction gearbox.

[0011] Preferably, the double crank transmission mechanism for the flying shear machine further includes a locking brake, which is disposed on the transmission mechanism.

[0012] Preferably, the protective shell is a structure of two symmetrical half-shells, which is easy to process and manufacture.

[0013] Preferably, one side of the two protective shells is hinged by the hinge, and the free end of the other side is provided with the outwardly extending edge plate.

[0014] Preferably, the sealing assembly further includes a sealing edge integrally formed at the opening and closing edge of the protective shell.

[0015] More preferably, the protrusion extends from one of the sealing edges, and the limiting groove is formed on the other sealing edge, to form a tighter fit.

[0016] Preferably, when the protective shell is closed, the protrusion is inserted into the limiting groove, and the two side plates are aligned with each other and fastened by the bolts, thereby forming a stable closed cavity.

[0017] This utility model has the following beneficial effects: 1. In this utility model, by adding a complete set of protective components, the eccentric wheel of the core transmission component is completely covered, which effectively achieves physical isolation. This can prevent solid particles such as dust and metal shavings commonly found in the working environment from entering the transmission mechanism, greatly reducing the wear and jamming risk of moving pairs, thereby significantly extending the service life of the equipment.

[0018] 2. In this utility model, an innovative sealing structure is designed at the opening and closing joint of the protective shell, in which a protrusion and a limiting groove are interlocked. This design not only increases the contact area, but also forms a tortuous sealing path. Its sealing effect is far superior to simple planar contact, which can effectively block the intrusion of external moisture and water vapor, prevent the corrosion of key metal components such as the eccentric wheel, and ensure the long-term stable operation of the equipment in humid or harsh environments.

[0019] 3. In this utility model, the protective component adopts a hinged opening and closing structure, which is fastened with bolts, making the installation and disassembly process of the entire protective device extremely simple. Maintenance personnel can quickly open the protective shell without complicated tools to inspect, lubricate or repair the internal eccentric wheel, which greatly shortens the downtime for equipment maintenance and reduces maintenance costs.

[0020] 4. In this utility model, the protective device has a simple and compact structure. The bolt connection ensures that it can still be firmly wrapped around the outside of the eccentric wheel when the equipment is running at high speed, without loosening or vibration. This design has strong versatility and can be easily applied to a variety of similar transmission mechanisms, improving the overall reliability and environmental adaptability of the equipment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a double-crank transmission mechanism for a flying shear machine proposed in this utility model; Figure 2 This is a schematic diagram of the reduction gearbox of a double crank transmission mechanism for a flying shear machine proposed in this utility model; Figure 3 This is a schematic diagram of the hinge structure of a double-crank transmission mechanism for a flying shear machine proposed in this utility model; Figure 4 This is a schematic diagram of the sealing assembly of a double crank transmission mechanism for a flying shear machine proposed in this utility model; Figure 5 This is a schematic diagram of the eccentric wheel of a double-crank transmission mechanism for a flying shear machine proposed in this utility model.

[0022] Legend: 1. Motor; 2. Gearbox; 3. Gear wheel; 4. Protective components; 401. Protective shell; 402. Edge plate; 403. Bolt; 404. Hinge; 5. Sealing components; 501. Sealing edge; 502. Limiting groove; 503. Protrusion; 6. Scissor body; 7. Locking brake; 8. Eccentric wheel. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to Figures 1 to 5 This utility model provides a double crank transmission mechanism for a flying shear machine, which aims to solve the problem that core transmission components such as eccentric wheels in existing flying shear machine transmission mechanisms are easily invaded by dust or moisture due to long-term exposure, leading to wear or corrosion, and ultimately affecting transmission accuracy and equipment service life.

[0025] The flying shear machine uses a double crank transmission mechanism, which includes a motor 1 as a power source, a reduction wheel 3 connected to the motor 1, an eccentric wheel 8 connected to the reduction wheel 3, and a shear body 6 connected to the eccentric wheel 8. The output power of the motor 1 is reduced and increased in torque by the reduction wheel 3, which drives the eccentric wheel 8 to rotate. The rotational motion of the eccentric wheel 8 is converted into the reciprocating motion of the shear body 6 through the transmission connection. The mechanism further includes a locking brake 7 set on the transmission mechanism for emergency braking. Furthermore, the reduction wheel 3 is housed inside the reduction gearbox 2.

[0026] The core of this mechanism is that it also includes a protective component 4 for covering the eccentric wheel 8 and a sealing component 5 set on the protective component 4. Through the structural cooperation of the protective component 4 and the sealing component 5, a sealed protection is formed for the eccentric wheel 8.

[0027] Specifically, refer to Figure 4 and Figure 5 The protective component 4 includes two symmetrically arranged protective shells 401 for combining to form a cavity. One side of the two protective shells 401 is rotatably connected by a hinge 404, so that the two protective shells 401 can be opened and closed. The free ends of the other side of the two protective shells 401 extend outward to form a side plate 402. Both side plates 402 are provided with through holes for fastening. Bolts 403 pass through the through holes on the two side plates 402 to fix the two protective shells 401 in the closed state.

[0028] To ensure a reliable seal after the protective shell 401 is closed, a sealing assembly 5 is also provided at the opening and closing mating edges of the two protective shells 401; see reference Figure 4The sealing assembly 5 includes a sealing edge 501 integrally formed on the mating edges of the two protective shells 401; a limiting groove 502 is formed on one sealing edge 501, and a protrusion 503 with a shape matching the limiting groove 502 is integrally provided on the other sealing edge 501; when the two protective shells 401 are closed, the protrusion 503 is precisely inserted into the limiting groove 502. This insertion and mating structure of the protrusion 503 and the limiting groove 502 increases the tortuosity and contact area of ​​the sealing path, thereby enhancing the sealing performance; after closing the two protective shells 401 around the eccentric wheel 8 and inserting the protrusion 503 into the limiting groove 502, the two side plates 402 are then fastened with bolts 403 to complete the installation and sealing protection of the eccentric wheel 8.

[0029] In some preferred embodiments of this invention, in order to achieve reliable support and protection for the transmission mechanism, the transmission mechanism further includes a reduction gearbox 2, and the reduction wheel 3 is disposed inside the reduction gearbox 2. The reduction gearbox 2 provides a stable mounting base and a sealed working environment for the reduction wheel 3.

[0030] As a safety measure, this embodiment also provides a solution with a locking brake 7. The locking brake 7 is set at an appropriate position in the transmission chain. In an emergency, the locking brake 7 is triggered to achieve rapid braking of the entire transmission mechanism, thereby stopping the movement of the scissor body 6.

[0031] In a preferred structural scheme, the protective shell 401 is composed of two symmetrical half-shells. This design allows for the use of universal manufacturing molds and reduces production costs. One side of the two half-shells is rotatably connected by a hinge 404, while the free ends on the other side extend outwards with straight edge plates 402. This structure allows the protective shell 401 to be opened and closed as easily as a clamshell, facilitating the installation and maintenance of the internal eccentric wheel 8.

[0032] To further improve the sealing effect of the sealing assembly 5, the sealing edge 501 is integrally formed on the mating edge of the protective shell 401; the protrusion 503 extends from the surface of one sealing edge 501, while the limiting groove 502 is formed on the surface of the other sealing edge 501 that matches it, and the height and width of the protrusion 503 are adapted to the depth and width of the limiting groove 502.

[0033] The working process and installation method of this technical solution are as follows: First, start the motor 1. The rotational power of the motor 1 is transmitted to the reduction wheel 3. After the reduction wheel 3 reduces the speed and increases the torque, it drives the eccentric wheel 8 to rotate. The eccentric wheel 8 drives the shear body 6 to perform a reciprocating upward shearing action through its eccentric structure. When it is necessary to protect the eccentric wheel 8, open the two protective shells 401 and put them on the outside of the eccentric wheel 8. Then close the two protective shells 401. During the closing process, the protrusion 503 on one protective shell 401 is inserted into the limiting groove 502 on the other protective shell 401. At the same time, the two edge plates 402 are aligned and attached to each other. Finally, the bolt 403 is passed through the through hole on the edge plate 402 and tightened, thus completing the installation of the protective component 4 and sealing the eccentric wheel 8 inside the protective shell 401.

[0034] The specific internal structure of the motor 1, the reduction box 2, the locking brake 7, and the standard model of the bolt 403 can be selected by those skilled in the art according to the actual working conditions. These are all well-known technologies in the field and will not be described in detail here.

[0035] Working Principle: In operation, the double-crank transmission mechanism of this flying shear machine first starts the motor 1. The rotational power output by the motor 1 is reduced and amplified in torque by the reduction wheel 3 within the reduction gearbox 2, and then transmitted to the eccentric wheel 8. Driven by the power, the eccentric wheel 8 rotates at a constant speed. Due to its eccentric structure, its rotational motion is converted into a periodic reciprocating upward shearing motion by connecting it to the shear body 6. Throughout the entire operation, the protective components 4 and sealing components 5 provide continuous protection for the eccentric wheel 8. When it is necessary to install, repair, or protect the eccentric wheel 8, the operator first connects the two protective shells 404 via hinges 404. 1. Open the protective shell 401 and wrap it around the outside of the eccentric wheel 8. Then close the two protective shells 401. During the closing process, the protrusion 503 on the opening edge of one protective shell 401 will accurately insert into the limiting groove 502 on the opening edge of the other protective shell 401. This plug-in structure forms a tortuous sealing path at the joint of the two protective shells 401. At the same time, the edge plates 402 at the free ends of the two protective shells 401 are also aligned and tightly fitted. Finally, the two aligned edge plates 402 are fastened together by bolts 403, thereby completely and firmly sealing the eccentric wheel 8 inside the cavity formed by the two protective shells 401, effectively preventing the intrusion of external dust and moisture.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-crank transmission mechanism for a flying shear machine, comprising: Motor (1); The reduction gear (3) is connected to the motor (1) in a transmission manner; An eccentric wheel (8) is connected to the reduction gear (3) in a transmission manner; and The scissor body (6) is connected to the eccentric wheel (8) in a transmission manner; Its features are, It also includes a protective assembly (4) located outside the eccentric wheel (8) and a sealing assembly (5) located at the opening and closing of the protective assembly (4); The protective assembly (4) includes two protective shells (401) hinged together by a hinge (404), and the free ends of the two protective shells (401) are respectively provided with side plates (402), and the two side plates (402) are fixedly connected by bolts (403); The sealing assembly (5) includes a limiting groove (502) disposed on the opening and closing edge of one of the protective shells (401) and a protrusion (503) disposed on the opening and closing edge of the other protective shell (401), the protrusion (503) being inserted into the limiting groove (502).

2. The double-crank transmission mechanism for a flying shear machine according to claim 1, characterized in that: It also includes a reduction gearbox (2), and the reduction wheel (3) is disposed inside the reduction gearbox (2).

3. The double-crank transmission mechanism for a flying shear machine according to claim 1, characterized in that: It also includes a locking brake (7), which is mounted on the transmission mechanism for braking.

4. The double-crank transmission mechanism for a flying shear machine according to claim 1, characterized in that: The protective shell (401) consists of two symmetrical half-shell structures.

5. The double-crank transmission mechanism for a flying shear machine according to claim 1, characterized in that: The two protective shells (401) are hinged on one side by the hinge (404), and the free ends on the other side are respectively provided with the outwardly extending edge plate (402).

6. The double-crank transmission mechanism for a flying shear machine according to claim 1, characterized in that: The sealing assembly (5) also includes a sealing edge (501) integrally formed on the opening and closing edge of the protective shell (401).

7. The double-crank transmission mechanism for a flying shear machine according to claim 6, characterized in that: The protrusion (503) extends from one of the sealing edges (501), and the limiting groove (502) is formed on the other sealing edge (501).

8. The double-crank transmission mechanism for a flying shear machine according to claim 1, characterized in that: When the protective shell (401) is closed, the protrusion (503) is inserted into the limiting groove (502), and the two side plates (402) are aligned with each other and fastened by the bolts (403).

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