Electric powerful cutting nippers

Abstract

The utility model relates to the technical field of cutting nippers, and discloses an electric powerful cutting nipper which comprises a shell, a transmission module is installed in the shell and comprises a hollow nut shaft rotationally connected with a bearing module, and one end of the hollow nut shaft is fixedly connected with an output shaft of a speed reduction module through a pin. The other end of the hollow nut shaft is in threaded connection with a lead screw, a triangular gear with a sliding limiting section is installed on the lead screw, and the triangular gear is in meshed connection with an eccentric gear. Power of the driving module is output to the hollow nut shaft through the speed reduction module, the triangular gear at the front end of the lead screw is driven to push forwards, linear motion of the triangular gear is converted into lateral thrust of the eccentric gear by means of a special gear structure and transmission design, the direction and the magnitude of the force can be effectively changed through conversion, and therefore the precision of the device is improved. And then the shearing force acts on the knife edge of the cutting nippers in a specific mode to generate strong shearing force, so that efficient shearing operation on materials such as metal wires and small metal plate leftover materials is realized.

Description

Technical Field

[0001] This utility model belongs to the field of cutting pliers technology, specifically to an electric heavy-duty cutting pliers. Background Technology

[0002] Pliers are a common hand tool widely used in various scenarios such as machining workshops and electronic equipment assembly. They are mainly used to cut metal wires and scraps of small metal sheets. For example, in machining workshops, workers can use pliers to cut off excess scraps generated during the processing of metal sheets; in the assembly of electronic equipment, pliers can also be used to cut off excess wires (such as copper wires) to facilitate subsequent connection operations.

[0003] Traditional shears have some drawbacks in use. For example, shears with labor-saving functions, such as breaker shears, are often bulky, requiring an extended lever arm. This makes them less flexible and inconvenient to carry and use in space-constrained scenarios such as narrow corners in machining workshops or limited operating areas for assembling electronic equipment. Moreover, traditional shears require significant manual labor to cut harder or thicker objects, making them time-consuming and laborious to operate. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides an electric high-power cutting pliers that is time-saving and labor-saving to operate, compact and lightweight, can be used flexibly in space-constrained scenarios, occupies little storage space, and is easy to carry.

[0005] The technical solution adopted by this utility model is as follows: An electric heavy-duty pliers includes a housing, a drive module installed inside the housing, a reduction module installed at the output end of the drive module, a bearing module threadedly connected to the reduction module, a transmission module with variable torque installed inside the bearing module, and a pliers blade installed at the output end of the transmission module; the transmission module includes a hollow nut shaft rotatably connected to the bearing module, one end of the hollow nut shaft being fixedly connected to the output shaft installed at the output end of the reduction module by a pin and locked by a nut thread, the other end of the hollow nut shaft being internally threaded to a lead screw, a triangular gear with a sliding limit section installed on the lead screw, the sliding limit section being slidably connected to the inner wall of the hollow nut shaft; eccentric gears are meshed on both sides of the triangular gear, both eccentric gears being rotatably connected to the pliers blades by pins, upper and lower washers are respectively provided above and below the two pliers blades, both upper and lower washers being fixed to the housing by bolts, and both pliers blades being rotatably connected between the upper and lower washers by pins.

[0006] Furthermore, eccentric gears are provided above and below both of the two pliers blades. The eccentric gear above and below any one of the pliers blades are fixedly connected by a connecting shaft, and the connecting shaft passes through the pliers blade.

[0007] Furthermore, both the upper and lower eccentric gears of the two shear blades are meshed with triangular gears, and the two triangular gears are symmetrically distributed on the upper and lower sides of the lead screw.

[0008] Furthermore, the bearing module is a bearing housing, and a thrust bearing is also installed inside the bearing housing.

[0009] Furthermore, the deceleration module is a planetary deceleration mechanism with a deceleration ratio of 23:1.

[0010] Furthermore, the drive module is a brushless motor.

[0011] Furthermore, the pliers blade is provided with a limiting plane to restrict the blade from continuing to compress.

[0012] Furthermore, the sliding limit segment is rectangular in shape.

[0013] Furthermore, the outer casing includes an upper casing and a lower casing, which are sealed and fastened together.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] This electric heavy-duty shears utilizes a drive module, a reduction module, a bearing module, and a torque-variable transmission module housed within its casing. Power from the drive module is transmitted via the reduction module to the hollow nut shaft, which drives the lead screw. The triangular gear at the lead screw's tip pushes forward. This linear motion of the triangular gear, through a special gear structure and transmission design, is converted into a lateral thrust from the eccentric gear. This conversion effectively alters the direction and magnitude of the force, which is then applied to the shears' blades in a specific manner, generating powerful shearing force. This enables efficient shearing of materials such as metal wire and small metal sheet scraps. Compared to traditional shears, it offers advantages such as labor-saving, time-saving, compact size and lightweight design, strong shearing force, and applicability to various shearing scenarios, especially in space-constrained environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this utility model;

[0018] Figure 2 for Figure 1 Internal structure diagram;

[0019] Figure 3 for Figure 2 Side view;

[0020] Figure 4 for Figure 3 AA section view;

[0021] Figure 5 A three-dimensional structural schematic diagram of the transmission module provided in an embodiment of this utility model;

[0022] Figure 6 for Figure 5 A three-dimensional structural diagram of the triangular gear, sliding limit section, and lead screw;

[0023] Figure 7 for Figure 5 A three-dimensional structural diagram of a medium-sized pair of pliers.

[0024] Figure descriptions: 1. Outer shell; 101. Upper shell; 102. Lower shell; 2. Brushless motor; 3. Planetary reduction gear; 4. Bearing housing; 5. Thrust bearing; 6. Hollow nut shaft; 7. Nut; 8. Lead screw; 9. Sliding limit section; 10. Triangular gear; 11. Eccentric gear; 12. Pliers; 13. Upper washer; 14. Lower washer; 15. Limiting plane. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The modules of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] The following is combined with Figures 1-7 This utility model will be described in detail.

[0029] Example

[0030] like Figures 1-4 As shown, an electric heavy-duty shears includes a housing 1, a drive module installed inside the housing 1, the drive module being a brushless motor 2, a reduction module installed at the output end of the brushless motor 2, the reduction module employing a planetary reduction mechanism 3 with a reduction ratio of 23:1, a bearing module threadedly connected to the reduction module, a transmission module with variable torque installed inside the bearing module, and a shear blade 12 installed at the output end of the transmission module.

[0031] The transmission module includes a hollow nut shaft 6 that is rotatably connected to the bearing module. One end of the hollow nut shaft 6 is fixedly connected to the output shaft installed at the output end of the reduction module by a pin and locked by a nut 7. One end of the output shaft is flat for insertion and installation on the output end of the reduction module. The other end of the output shaft is fixedly connected to the hollow nut shaft 6 by a pin, and this end of the hollow nut shaft 6 is threaded and locked by a threaded nut 7.

[0032] The other end of the hollow nut shaft 6 is internally threaded with a lead screw 8. A triangular gear 10 with a sliding limit section 9 is mounted on the lead screw 8. The sliding limit section 9 is slidably connected to the inner wall of the hollow nut shaft 6. The sliding limit section 9 is rectangular in shape and is slidably connected to the inner wall of the hollow nut shaft 6. It plays a guiding and limiting role, ensuring the smoothness of the triangular gear 10 during transmission.

[0033] Both sides of the triangular gear 10 are meshed with eccentric gears 11. Each eccentric gear 11 is rotatably connected to a pair of pliers blades 12 via a pin. An upper washer 13 and a lower washer 14 are respectively positioned above and below each of the pliers blades 12. Both the upper washer 13 and the lower washer 14 are fixed to the outer casing 1 with bolts. The pliers blades 12 are rotatably connected between the upper washer 13 and the lower washer 14 via pins. The upper washer 13 and the lower washer 14 form the support and movable structure for the pliers blades 12, enabling the pliers blades 12 to open and close under the drive of the eccentric gears 11.

[0034] In this embodiment, as Figure 5 As shown, eccentric gears 11 are provided above and below the two pliers blades 12. The eccentric gear 11 above and below any one of the pliers blades 12 is fixedly connected by a connecting shaft, and the connecting shaft passes through the pliers blade 12.

[0035] This structural design allows the two eccentric gears 11 above and below the pliers blade 12 to move synchronously, ensuring that the cutting action of the pliers blade 12 is coordinated and consistent.

[0036] In this embodiment Figure 6 As shown, the upper and lower eccentric gears of the two pliers blades 12 are both meshed with triangular gears 10, and the two triangular gears 10 are symmetrically distributed on the upper and lower sides of the lead screw 8.

[0037] Since eccentric gears 11 are installed above and below the pliers blade 12, there are two corresponding triangular gears 10, which improves transmission efficiency and stability.

[0038] In this embodiment, as Figure 4 As shown, the bearing module is a bearing housing 4, and a thrust bearing 5 is also installed inside the bearing housing 4.

[0039] The bearing inside the bearing housing 4 is mainly used to support the hollow nut shaft 6 and bear the radial and axial loads of the hollow nut shaft 6 during rotation. It ensures that the hollow nut shaft 6 can rotate smoothly and steadily, reduces friction and wear between the hollow nut shaft 6 and the bearing housing 4, thereby improving the reliability and service life of the entire transmission module of this utility model.

[0040] The thrust bearing is primarily used to withstand the axial force of the hollow nut shaft 6. During the operation of the shearing pliers, when the lead screw 8 drives the triangular gear 10 and subsequent transmission components to perform shearing actions, an axial thrust is generated. The thrust bearing can effectively withstand this axial thrust, preventing the hollow nut shaft 6 from shifting in the axial direction and ensuring the accuracy and stability of the transmission.

[0041] In this embodiment, as Figure 7 As shown, the pliers 12 is provided with a limiting plane 15 to restrict the blade from continuing to compress. After the pliers 12 completes the cutting action, the limiting plane 15 can restrict the blade from continuing to compress, thereby protecting the blade of the pliers 12 from breaking and extending the service life of the pliers 12.

[0042] In this embodiment, as Figure 1 As shown, the outer casing 1 includes an upper casing 101 and a lower casing 102, which are sealed and fastened together. The sealing and fastening between the upper casing 101 and the lower casing 102 serves to protect the internal modules and prevent dust and debris from entering.

[0043] Specifically, when using this electric heavy-duty shears, the brushless motor 2 starts, and the power is reduced by the planetary reduction mechanism 3 before being transmitted to the hollow nut shaft 6. The hollow nut shaft 6 drives the lead screw 8 to rotate, and the triangular gear 10 on the lead screw 8, guided by the sliding limit section 9, converts the rotational motion into a linear pushing motion. The triangular gear 10 pushes forward, causing the eccentric gears 11 on both sides to be compressed and generate a changing torque, pushing them apart to the left and right. The pushed-away eccentric gears 11 drive the shear blade 12 to rotate around the pinion, causing the force-bearing end (blade) of the shear blade 12 to produce a powerful shearing effect. After shearing is completed, the limiting plane 15 restricts the blade from continuing to compress, protecting the blade from breaking.

[0044] Through this gear transmission method with varying torque, the electric heavy-duty shears achieve efficient and powerful cutting capabilities, saving time and effort. Furthermore, the integration of all modules within the housing 1 makes the overall design compact, lightweight, and easy to carry. Therefore, it has broad application prospects in various scenarios such as machining workshops and electronic equipment assembly.

[0045] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electric heavy-duty shears, comprising a housing (1), characterized in that: A drive module is installed inside the outer shell (1). A reduction module is installed at the output end of the drive module. A bearing module is threadedly connected to the reduction module. A transmission module with variable torque is installed inside the bearing module. A pliers knife (12) is installed at the output end of the transmission module. The transmission module includes a hollow nut shaft (6) rotatably connected to the bearing module. One end of the hollow nut shaft (6) is fixedly connected to the output shaft installed at the output end of the deceleration module by a pin and locked by a nut (7). The other end of the hollow nut shaft (6) is internally threaded with a lead screw (8). A triangular gear (10) with a sliding limit section (9) is installed on the lead screw (8). The sliding limit section (9) is slidably connected to the inner wall of the hollow nut shaft (6). Both sides of the triangular gear (10) are meshed with eccentric gears (11). The two eccentric gears (11) are rotatably connected to the pliers (12) through pins. The upper shim (13) and the lower shim (14) are respectively provided above and below the two pliers (12). The upper shim (13) and the lower shim (14) are fixed to the outer shell (1) by bolts. The two pliers (12) are rotatably connected between the upper shim (13) and the lower shim (14) through pins.

2. The electric heavy-duty shears according to claim 1, characterized in that: Eccentric gears (11) are provided above and below the two pliers (12). The eccentric gears (11) above and below any one of the pliers (12) are fixedly connected by a connecting shaft, and the connecting shaft passes through the pliers (12).

3. The electric heavy-duty shears according to claim 2, characterized in that: The upper and lower eccentric gears of the two shearing blades (12) are both meshed with triangular gears (10), and the two triangular gears (10) are symmetrically distributed on the upper and lower sides of the lead screw (8).

4. The electric heavy-duty shears according to claim 1, characterized in that: The bearing module is a bearing housing (4), and a thrust bearing (5) is also installed inside the bearing housing (4).

5. The electric heavy-duty shears according to claim 1, characterized in that: The deceleration module is a planetary deceleration mechanism (3) with a deceleration ratio of 23:

1.

6. The electric heavy-duty shears according to claim 1, characterized in that: The drive module is a brushless motor (2).

7. The electric heavy-duty shears according to claim 1, characterized in that: The pliers (12) is provided with a limiting plane (15) to restrict the blade from continuing to squeeze.

8. The electric heavy-duty shears according to claim 1, characterized in that: The sliding limit segment (9) is rectangular in shape.

9. The electric heavy-duty shears according to claim 1, characterized in that: The outer shell (1) includes an upper shell (101) and a lower shell (102), which are sealed and fastened together.

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