CN114607735A - A gear pair, an anti-skip gear mechanism and an electric clipper tool - Google Patents

Abstract

The invention discloses a gear pair, which comprises a driving gear and a passive side pendulum gear that mesh with each other, the driving gear and the passive side pendulum gear are provided with an anti-jump tooth structure, and the anti-jump tooth structure is a tooth surface angle The tooth surface is 75 degrees to 90 degrees. On the passive side pendulum gear, the tooth surface is the shear force working surface when the passive pendulum gear swings and meshes, and the angle between the shear force working surface and the horizontal plane is 0 ~15 degrees. Also disclosed are a gear anti-jump gear mechanism and an electric clipper tool. The gear anti-jump gear mechanism greatly reduces the normal force of the outward deflection of the passive swing gear, so that the passive swing gear is not easy to slip and jump teeth, so that the shear force of the passive swing gear always meshes with the driving gear. direction, that is, the shear force is effectively reduced in the reverse force between the passive side-swing gear and the driving gear, that is, the disengagement force is effectively reduced, thereby reducing the risk of gear slippage and completely solving the passive side-swing gear jump. tooth problem.

Description

A gear pair, an anti-skip gear mechanism and an electric clipper tool

technical field

The invention belongs to the technical field of gear transmission, and in particular relates to a gear pair, a gear anti-skip gear mechanism, and an electric shear and pliers-type tool.

Background technique

Gear-driven open-close work tools are commonly used work tools, but because open-close work tools need to withstand external forces during use to achieve shearing and other functions, excessive external force can easily cause the gears to slip under the action of force. , resulting in tooth skipping, which leads to problems such as the inability of the worker to use it normally. For example, electric scissors used for forestry and planting industry pruning. Under normal circumstances, when cutting smaller branches, the electric scissors can quickly remove excess branches. It is convenient and labor-saving to cut off, but if you cut large branches, due to excessive external force, it will cause the problem of gear disengagement. The teeth make the scissors inoperable. Moreover, the existing opening and closing tools are all set according to the specifications. An opening and closing tool can only meet the operation requirements of the same operation or the same specification, and cannot realize universal use by quickly replacing opening and closing parts, such as shearing blades. sexual design requirements.

For example, a Chinese patent document (announcement date: April 9, 2021, announcement number: CN212910875U) discloses a single-acting blade electric scissors with an anti-jumping function, which includes a bracket and is rotatably mounted on the bracket The swing tooth and the movable blade installed on the swing tooth and driven by the swing tooth to rotate, the fixed blade fixed on the bracket and adapted to the movable blade, the bevel gear and the driving device for driving the swing tooth to swing, the bracket An anti-jump tooth screw with adjustable relative position is screwed on the side surface, and the end of the anti-jump tooth screw is exposed on the inner side surface of the bracket and forms a space with the outer surface of the swing tooth. When cutting a branch with a large size, the movable blade will be deflected outward by a large normal force, so that the swing tooth will also be deflected outward to deform. At this time, the outer surface of the swing tooth will be in contact with the anti-jump The end of the tooth screw is in contact and plays a supporting role to prevent the swing tooth from failing when it is deformed to exceed the meshing height of the bevel gear, and the anti-jump tooth screw forms an effective limit for the swing tooth to ensure that the swing tooth meshes with the bevel gear and prevents jumping. tooth phenomenon.

The above technical solution is to prevent the tooth jumping phenomenon by setting the anti-jumping tooth screw, but the technical solution is that the anti-jumping tooth screw is a point force anti-jumping tooth, and the movable blade is subjected to a large normal force direction. When the oscillating tooth is deflected outward, the anti-jump-tooth screw realizes point support for the oscillating tooth, which will cause the oscillating tooth to be stressed at a single point, and the force will be uneven. Teeth and risk of deformation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problem that the existing gear pair is easy to slip during the gear transmission process, resulting in the phenomenon of tooth skipping, and the gear-driven scissors or pliers are easy to slip during use, resulting in the phenomenon of tooth skipping. It affects the normal use of the tool, and at the same time overcomes the single-point force and uneven force of the existing anti-jump tooth structure, which cannot really solve the problem of anti-jump teeth. Instead, a gear pair is provided, which realizes the meshing through the tooth structure of the meshing teeth itself. In addition, a gear anti-jumping mechanism is provided, which can separate the gear pair's own tooth shape and the surface-contact anti-jumping gear components. Or the anti-jump gear mechanism formed together can make the swing teeth evenly stressed, which can effectively avoid the occurrence of the gear-jump phenomenon; at the same time, it also provides a gear anti-jump gear mechanism and electric scissors and pliers tools that can quickly replace the opening and closing parts. .

The technical solution adopted by the present invention to achieve its first purpose of the invention is: a gear pair, comprising a driving gear and a passive side pendulum gear meshing with each other, the driving gear and the passive side pendulum gear are provided with an anti-jump tooth structure , the anti-jump tooth structure is a tooth surface with a tooth surface angle of 75 degrees to 90 degrees. On the passive side pendulum gear, the tooth surface is the shear force working surface when the passive side pendulum gear swings and meshes. The angle between the force working surface and the horizontal plane is 0 to 15 degrees. In this gear pair, the tooth surface of the anti-jump tooth is arranged on the driving gear and the passive gear, and the tooth surface is in an approximate right-angled trapezoid structure, so that the force direction of the passive side swing gear mainly acts on the tooth surface, which greatly reduces the impact on the tooth surface. The normal force of the outward deflection of the passive swing gear is reduced, so that the passive swing gear is not easy to slip and skip teeth, so that the shear force of the passive swing gear always faces the direction of meshing with the driving gear, that is, the shear force is in the passive swing gear. The force of the reverse meshing between the gear and the driving gear is effectively reduced, that is, the force of disengagement is effectively reduced, thereby reducing the risk of gear slippage and completely solving the problem of tooth skipping of the passive swing gear.

Preferably, the driving gear is a driving bevel gear, and the driving gear includes a spiral bevel gear and a spur bevel gear; the driven side pendulum gear is a driven side pendulum bevel gear, and the driven side pendulum gear Including spiral bevel gears and straight bevel gears.

The technical solution adopted by the present invention to achieve the second purpose of the invention is: a gear anti-skip mechanism with a gear pair, comprising a gear bracket, a fixed assembly arranged on the gear bracket and meshingly opened and closed through the gear pair, and The moving component, the tooth surface forming the anti-jump tooth structure on the passive side swing gear is the shearing force working surface when the moving component moves to the closing direction. The gear anti-jumping mechanism is provided with an anti-jumping tooth structure on the gear pair. The anti-jumping tooth structure makes the passive side swing gear mesh with the driving gear and is subjected to shearing force, and the force direction of the shearing force acts on the anti-jumping tooth structure. On the other hand, the normal force of the outward deflection of the passive swing gear is greatly reduced, so that the passive swing gear is not easy to slip and jump teeth, so that the shear force of the passive swing gear is always in the direction of meshing with the driving gear, that is, shearing The force in the opposite direction of the meshing of the passive swing gear and the driving gear is effectively reduced, that is, the force of disengagement is effectively reduced, thereby reducing the risk of gear slippage, and completely solving the problem of tooth skipping of the passive swing gear. The tooth profile of the passive side-swing bevel gear is approximately a right-angled trapezoid structure, and the approximately right-angled tooth surface is set as the shearing force working surface when the shearing moving component is in the closing direction, and the shearing force working surface angle is connected to the horizontal plane clamp. The angle is between 0 and 15 degrees, so that the force direction of the passive swing gear mainly acts on the moving component, which greatly reduces the normal force of the passive swing gear outward, so that the passive swing gear is not easy to slip. Jump teeth; of course, this angle range can be relaxed when the shear force is small. Correspondingly, the driving gear is also provided with a tooth surface having an approximately right-angled trapezoid structure, so as to be paired with the passive side-swing gear to mesh with each other.

Preferably, an anti-jump tooth component is provided on the outside of the passive side swing gear, and a gap is set between the inner surface of the anti-jump tooth component and the outer surface of the passive side swing gear; the anti-jump tooth component and the gear are provided with a gap. The support forms a symmetrical force-bearing structure. An anti-jump tooth component is installed on the outside of the passive swing gear. The double anti-jump tooth is realized by the anti-jump tooth structure and the anti-jump tooth component. The anti-jump tooth component makes the passive swing gear between the gear bracket and the anti-jump tooth component. The bracket and the anti-jump tooth part form a symmetrical force structure on both sides, which avoids the problem of bending and deformation of the gear bracket under stress on one side during the shearing process, and improves the stability of shearing; the inner side of the anti-jump tooth part and the passive side swing The outer side of the gear maintains a small enough clearance. When the passive side pendulum gear is pre-deformed by a large external force, the clearance is small enough to make the outer side of the passive side pendulum gear fit with the inner side of the anti-jump tooth component. Prevents the occurrence of the phenomenon of the passive side swing gear deforming to the outside and skipping teeth.

Preferably, the anti-jump tooth component includes a gear bracket connecting end and a rotating shaft connecting end that are integrally arranged, a shaft hole is disposed at the rotating shaft connecting end, and a plurality of fixing holes are disposed at the gear bracket connecting end; the The connecting end of the rotating shaft of the anti-skip tooth part and the passive side pendulum gear are in contact with each other through a plane or through a plane thrust bearing; the inner side of the connecting end of the gear bracket of the anti-skip gear part and the outer side of the passive side pendulum gear are in contact with each other; A gap is provided. The anti-jump tooth component is preferably a symmetrical force anti-jump tooth connecting rod. The above structure of the anti-jump tooth component is convenient to connect with the rotating shaft through the shaft hole, so as to realize the coaxial arrangement with the passive side swing gear and the moving component, and at the same time, at the connecting end of the gear bracket Multiple fixing holes are provided to facilitate connection with the gear bracket through fasteners to form a U-shaped symmetrical force-bearing structure with the gear bracket, and this U-shaped symmetrical force-bearing structure also facilitates the rapid replacement of the fixed and moving components without disassembly. The symmetrical force and anti-jump tooth connection can realize the replacement of the moving component and the fixed component, so as to realize the design of the universal structure. The gap between the outer side of the passive side swing gear and the inner side of the anti-skip gear part is small enough. Generally, the size of each part can be set during processing, and the installation size of different opening and closing parts corresponds.

Preferably, the driving gear is a driving bevel gear, and the driving gear includes a spiral bevel gear and a straight bevel gear. The driving gear is installed on the gear bracket and is connected with the power mechanism in a force-transmitting manner, and the moving component is connected with the passive side swing gear and is rotatably connected with the gear bracket through a rotating shaft.

Preferably, the passive side pendulum gear is a passive side pendulum bevel gear, and the passive side pendulum gear includes a spiral bevel gear and a straight bevel gear; the passive side pendulum gear is a pendulum rod structure and is provided with gears The gear end is meshed with the driving gear, a limit hole is arranged at the gear end, and a limit member is arranged inside the limit hole; the swing end is provided with a rotating shaft connection hole and a moving end. Component connection holes. The purpose of setting the limiter is to limit the swing position of the passive side swing gear, and the limiter is generally limited by a magnet. The swinging end is provided with a shaft connecting hole to realize the coaxial connection with the moving component through rotation, and the moving component connecting hole is provided to facilitate the connection between the moving component and the passive swing gear, so as to realize the swing of the passive swing gear to drive the moving assembly. do the opening and closing action.

Preferably, the fixed assembly is provided with a gear bracket fixing hole and a rotating shaft hole; the movable assembly is provided with a rotating shaft hole and a fixed pin hole. The setting of the gear bracket fixing hole on the fixed component is to facilitate the fixed connection between the fixed component and the gear bracket, and the setting of the rotating shaft hole is to facilitate the fixed connection between the fixed component and the rotating shaft. The rotating shaft hole is provided on the moving assembly to facilitate the rotational connection with the rotating shaft, and the fixed pin hole is to facilitate the connection of the moving assembly with the passive swing gear through the connection.

Preferably, the gear bracket includes a connecting body and a mounting body that are integrally arranged, a mounting cavity is provided inside the connecting body, and the mounting body is an L-shaped structure as a whole, with an axial plate surface and a radial plate surface. , the connection between the axial plate surface and the radial plate surface is provided with a drive gear installation hole that communicates with the installation cavity, and the end of the axial plate surface is provided with a fixed component installation slot and a shaft hole perpendicular to the axial plate surface ; The end surface of the radial plate surface is provided with a mounting surface of the anti-jump tooth component. The above structure of the gear bracket can be connected to the motor and the reducer housing through the connecting body, and the installation body can realize the installation of the driving gear, the fixed component, the moving component and the anti-jump gear part, and at the same time, the gear bracket and the anti-jump can be installed. The combination of tooth parts forms a symmetrical force-bearing structure, which can effectively realize the unilateral gear anti-jump tooth of the passive side-swing gear, and the mounting body can be installed on the left or right side along the axis of the connecting body, that is, The anti-skip tooth component can be arranged on the left or right side of the gear bracket in the direction of use.

Preferably, a spring mounting seat and a trigger seat are arranged on the side of the axial plate surface. The purpose of arranging the spring mounting seat and the trigger seat on the side of the axial plate surface is to facilitate the setting of the trigger and thus facilitate the operation. Of course, the trigger can also be arranged on the casing instead of the gear bracket.

Preferably, the rotating shaft structure is designed according to the coaxial arrangement structure of the gear bracket, the fixed component, the moving component, the passive side swing gear and the anti-jump tooth component, including the penetrating structure from the gear bracket side and the anti-jump tooth component from the side of the gear bracket. Side entry structure. Since the passive side swing gear can be arranged on the left or right side of the gear bracket, the anti-jump tooth parts are correspondingly arranged on the left and right sides, and the rotating shaft is also correspondingly penetrated from the right side and the left side to realize the connection. Therefore, the rotating shaft can be set to different structural shapes, and the specific operations can be set according to actual needs.

The technical solution adopted by the present invention to achieve the third purpose of the invention is: an electric clipper tool, comprising a motor, a reducer and the gear anti-skip mechanism.

Preferably, the motor is connected to the reducer, the reducer is connected to the gear bracket and the driving gear and transmits the output torque to the driving gear, the driving gear transmits the torque to the passive swing gear, and the passive swing gear drives the The fixed component realizes opening and closing.

The electric scissor tool includes a motor, a reducer, a fixed component and a moving component arranged in the casing. The motor is connected to the reducer, the reducer is connected to the driving gear and transmits the output torque, and the driving gear transmits the torque to the passive swing gear. , and make the moving component connected to the passive side swing gear open, close and swing with the rotating shaft as the center of rotation, the moving component and the fixed component form a shearing mode or a pincer mode, and the rotating shaft and the fixed component fasten the gear bracket in the middle At the same time, the moving components, the passive side-swing bevel gears and the anti-jump tooth components pass through the rotating shaft and are fastened by tightening nuts and anti-loosening screws, thereby forming electric scissors or electric pliers and other opening and closing tools. The electric scissor type tool completely solves the problem of tooth skipping of the passive side-swing gear due to the provision of an anti-jumping tooth structure or a double anti-jumping tooth structure such as an anti-jumping tooth structure and an anti-jumping tooth component, so that it is always connected with the driving gear. Meshing, there will be no slippage and jump teeth, ensuring normal opening and closing work.

Beneficial effects of the invention: the gear pair and the gear anti-skip mechanism completely solve the problem of gear skipping. The direction acts on the anti-jump tooth structure, which greatly reduces the normal force of the passive swing gear outward, so that the passive swing gear is not easy to slip and jump teeth, so that the shear force of the passive swing gear is always oriented to the active side. The gear meshing direction, that is, the shear force in the reverse direction of the meshing of the passive side swing gear and the driving gear is effectively reduced, that is, the disengagement force is effectively reduced, thereby reducing the risk of gear slippage and completely solving the passive side swing. Gear jumping problem. The anti-jump tooth part and the gear bracket form a U-shaped symmetrical force structure, which prevents the gear bracket from being bent and deformed by unilateral force. The anti-jump tooth part and the outside of the passive swing gear keep a small enough gap so that the passive swing gear can be removed when the external force exceeds the force. Blocking, the passive side pendulum bevel gear will always keep meshing with the driving gear after being stressed, and will not produce tooth skipping, realize the design of the passive side pendulum gear surface type anti-skip tooth structure, and completely solve the problem of the passive side pendulum gear skipping teeth; And it can directly solve the maintenance troubles of fruit farmers, garden pruning, construction water pipe cutting, pliers operations and other related workers due to the inability of scissors and pliers to open and close the teeth to work.

Description of drawings

Fig. 1 is a kind of structural representation of the gear pair of the present invention;

Fig. 2 is a kind of structural schematic diagram of the anti-jump tooth structure of the present invention;

Fig. 3 is another kind of structural schematic diagram of the anti-jump tooth structure in the present invention;

Fig. 4 is a kind of structural schematic diagram of the gear anti-skip mechanism of the present invention;

5 is a schematic diagram of an exploded structure of the gear anti-skip mechanism of the present invention;

Fig. 6 is a kind of structural schematic diagram of the gear anti-skip mechanism in Embodiment 3 of the present invention;

7 is a schematic diagram of an exploded structure of the gear anti-skip mechanism in Embodiment 3 of the present invention;

FIG. 8 is a schematic structural diagram of the meshing of the driving gear and the driven side pendulum gear in the present invention;

Fig. 9 is a kind of structural representation of the anti-jump tooth component in the present invention;

Fig. 10 is a kind of structural schematic diagram of the passive side pendulum gear in the present invention;

Fig. 11 is a kind of structural representation of the gear bracket in the present invention;

Fig. 12 is a kind of structural representation of the rotating shaft of the present invention;

Fig. 13 is a kind of structural representation of the electric scissors of the present invention opening and closing state;

14 is a schematic structural diagram of the closed state of the electric scissors in the present invention;

Fig. 15 is the second structure schematic diagram of the gear bracket in the present invention;

Fig. 16 is a kind of exploded structure schematic diagram of electric scissors in the embodiment 4 of the present invention;

17 is a schematic structural diagram of the rotating shaft in Embodiment 4 of the present invention;

18 is a schematic diagram of an exploded structure of the electric scissors in Embodiment 5 of the present invention;

19 is a schematic structural diagram of a rotating shaft in Embodiment 5 of the present invention;

Fig. 20 is a kind of exploded structure schematic diagram of electric scissors in the embodiment 6 of the present invention;

Fig. 21 is a kind of structural schematic diagram of the electric cutting knife (for building and installing PVC plastic water pipes) in Embodiment 7 of the present invention;

In the figure: 1. Fixed component, 11. Gear bracket fixing hole, 12. Rotating shaft hole, 13. Fitting groove for pipe diameter, 14. Cutting knife groove, 2. Moving component, 21. Rotating shaft hole, 22. Fixing pin hole , 3, gear bracket, 31, connecting body, 32, mounting body, 33, mounting cavity, 34, axial plate, 341, spring mounting seat, 342, trigger seat, 343, trigger, 344, spring, 35, diameter To plate surface, 36, Drive gear mounting hole, 37, Fixed component mounting slot, 38, Shaft hole, 39, Anti-skip tooth component mounting surface, 4, Drive gear, 5, Passive swing gear, 51, Gear end, 52 , swing end, 53, limit hole, 54, limit piece, 55, shaft connection hole, 56, moving component connection hole, 57, tooth surface, 6, shaft, 63, operation end, K6, shaft outer circle, F6 , External thread of rotating shaft, 64, Rotating section, 65, Fastening section, 66, Hexagonal connecting section, 67, Flat square hole section, 7. Anti-skip tooth part, 71, Gear bracket connection end, 72, Rotating shaft connection end, 73 , Shaft hole, 75, Fixed hole, 8, Planar thrust bearing, 9, Anti-loose tooth piece, 10, Fixed knife installation boss, 100, Motor, 200, Reducer, β, tooth surface angle, α, included angle.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

Example 1:

In the embodiments shown in FIGS. 1 , 2 and 3 , a gear pair includes a driving gear 4 and a passive swing gear 5 that mesh with each other, and the driving gear 4 and the passive swing gear 5 are provided with Anti-jump tooth structure, the anti-jump tooth structure is the tooth surface 57 with a tooth surface angle β of 75 degrees to 90 degrees, and on the passive side pendulum gear, the tooth surface is the shear force when the passive pendulum gear swings and meshes Working face, the angle α between the shear stress working face and the horizontal plane is 0 to 15 degrees. The driving gear 4 is a driving bevel gear, and the driving gear 4 includes a spiral bevel gear and a straight bevel gear; the passive side swing gear 5 is a passive side swing bevel gear, and the passive side swing gear 5 Including spiral bevel gears and straight bevel gears.

As shown in FIG. 2 , the driven side pendulum gear 5 is provided with a tooth surface 57 with a tooth surface angle β of 75 degrees to 90 degrees. The angle α between the working surface of the tangential force surface and the horizontal surface is 0 to 15 degrees. The tooth profile of the passive side pendulum bevel gear is approximately a right-angled trapezoid structure, and its approximately right-angled tooth surface is set as the shear force surface during swing meshing, and the angle α between the shear force working surface and the horizontal plane is 0 to 15 degrees. In this embodiment, the tooth surface angle β is 75 degrees, and the shear force working surface angle α is close to about 15 degrees on the horizontal plane, which greatly reduces the normal force of the passive side pendulum gear 5 to deflect outwards so that the The passive side swing gear 5 is not easy to slip and skip teeth; of course, this angle range can be relaxed when the shear force F is small. In another embodiment, as shown in FIG. 3 , the tooth surface angle β is 80 degrees, and the shear force working surface angle α is close to 10 degrees on the horizontal plane. The tooth surfaces of the corresponding driving gears are paired and meshed with the passive swing gears.

Example 2:

In the embodiment shown in Figures 4 and 5, a gear anti-skip mechanism is suitable for a variety of opening and closing tools in various industries that require opening and closing actions, including a gear bracket 3, a gear pair assembly, and a gear bracket 3. The fixed assembly 1 and the movable assembly 2 are meshed and opened and closed through the gear pair assembly. The gear pair assembly includes a driving gear 4 and a passive side swing gear 5 meshing with the driving gear 4. The fixed assembly 1 is fixed on the On the gear bracket 3, the moving assembly 2 is connected with the passive side swing gear 5 and is rotatably connected with the gear bracket 3 through a rotating shaft 6. The gear pair assembly is provided with an anti-jumping tooth structure. The anti-jumping tooth The structure is a tooth surface 57 with a tooth surface angle β of 75 degrees to 90 degrees. On the passive side swing gear, the tooth surface is the shearing force working surface when the moving component is in the closing direction, and the shear force is between the working surface and the horizontal plane. The included angle α is 0 to 15 degrees. In order to make the force direction of the passive side swing gear 5 mainly act on the moving component, the normal force of the passive side swing gear 5 to be deflected outward is greatly reduced, so that the passive side swing gear 5 is not easy to slip and skip teeth.

As shown in FIG. 2 , the driven side swing gear 5 is provided with a tooth surface 57 with a tooth surface angle β of 75 degrees to 90 degrees. The angle α between the working surface of the force-bearing surface and the horizontal surface is 0 to 15 degrees. The tooth profile of the passive side-swing bevel gear is approximately a right-angled trapezoid structure, and the approximately right-angled tooth surface is set as the shearing force surface when the shearing moving component is in the closing direction, and the angle between the shearing force working surface and the horizontal plane is α. It is between 0 and 15 degrees. In this embodiment, the tooth surface angle β is 75 degrees, and the shear force working surface angle α is close to about 15 degrees on the horizontal plane, so that the force direction of the passive side swing gear 5 mainly acts on On the moving assembly, the normal force of the outward deflection of the passive swing gear 5 is greatly reduced, so that the passive swing gear 5 is not easy to slip and skip teeth; of course, this angle range can be relaxed when the shear force F is small. In another embodiment, as shown in FIG. 3 , the tooth surface angle β is 80 degrees, and the shear force working surface angle α is close to 10 degrees on the horizontal plane. The tooth surfaces of the corresponding driving gears are paired and meshed with the passive swing gears.

Example 3:

In the embodiments shown in Fig. 6, Fig. 7, Fig. 8, a gear anti-skip gear mechanism is suitable for a variety of opening and closing tools in various industries that require opening and closing actions, including a gear bracket 3, a gear pair assembly, a The fixed assembly 1 and the movable assembly 2 are meshed on the gear bracket 3 and open and close through the gear pair assembly. The gear pair assembly includes a driving gear 4 and a passive swing gear 5 meshing with the driving gear 4. The fixed assembly 1 is fixed on the gear bracket 3, the moving assembly 2 is connected with the passive side swing gear 5 and is rotatably connected with the gear bracket 3 through a rotating shaft 6, and the gear pair assembly is provided with an anti-jump tooth structure. The outer side of the passive swing gear 5 is provided with an anti-jump tooth part 7, and a gap is set between the inner side of the anti-jump tooth part 7 and the outer side of the passive swing gear 5; the anti-jump tooth part 7 and the gear bracket 3 to form a symmetrical force structure. The anti-jump tooth structure is a tooth surface 57 with a tooth surface angle β of 75 degrees to 90 degrees. On the passive side swing gear, the tooth surface is the shear force surface when the moving component is in the closing direction, and the shear force surface is The angle α between the working surface and the horizontal surface is 0 to 15 degrees. In order to make the force direction of the passive side pendulum gear 5 mainly act on the moving component, the normal force of the outward deflection of the passive side pendulum gear 5 is greatly reduced, so that the passive side pendulum gear 5 is not easy to slip and skip teeth;

As shown in FIG. 9 , in this embodiment, the anti-jumping tooth component is a symmetrical force-bearing anti-jumping tooth connecting rod. The anti-jumping tooth component 7 includes a gear bracket connecting end 71 and a rotating shaft connecting end 72 that are integrally arranged. The shaft connection end 72 is provided with a shaft hole 73 , and the gear bracket connection end 71 is provided with a plurality of fixing holes 75 . The connection end of the rotating shaft of the anti-skip tooth component 7 and the passive side swing gear are in contact with each other through a plane contact or through a plane thrust bearing; in this embodiment, the contact is preferably through a plane thrust bearing 8 . A gap is provided between the inner side surface of the connecting end 71 of the gear bracket of the anti-skip tooth component 7 and the outer side surface of the passive swing gear 5 . By setting the anti-jump tooth component to form a U-shaped symmetrical force structure with the gear bracket, in this embodiment, the connection end of the gear bracket of the anti-jump tooth component is set in a T-shaped structure, and the connecting end of the rotating shaft is set in a circular shape, which is convenient for passing the shaft. The hole is connected with the rotating shaft to realize the coaxial arrangement with the passive side swing gear and the moving component. At the same time, a plurality of fixing holes are arranged at the connecting end of the gear bracket to facilitate the connection with the gear bracket through fasteners to form a U-shaped symmetrical force with the gear bracket. Structure, the number of fixed holes can be selected according to the force needs, the U-shaped symmetrical force structure also facilitates the rapid replacement of fixed components and moving components, and the moving components can be realized without disassembling the symmetrical force anti-jump tooth connection And the replacement of fixed components to achieve the design of universal structure.

In this embodiment, the driving gear 4 is a driving bevel gear, and the gear pair of the driving gear 4 includes a spiral bevel gear and a straight bevel gear. The driving gear 4 is mounted on the gear bracket 3 and is connected with the power mechanism in a force-transmitting manner.

As shown in FIG. 10 , the passive swing gear 5 is a passive swing bevel gear, and the gear pair of the passive swing gear 5 includes a spiral bevel gear and a spur bevel gear. The passive side pendulum gear 5 is provided with a gear end 51 and a swing end 52 in a pendulum structure. A limiting member 54 is arranged inside the limiting hole 53; the swinging end 52 is provided with a rotating shaft connecting hole 55 and a moving component connecting hole 56. In order to limit the swinging position of the driven side swing gear, a limiter is provided, and in this embodiment, the limiter adopts a magnet. During the installation process, the shaft connection hole of the swing end is coaxially connected with the moving component, and at the same time, the passive side swing gear is provided with a moving component connection hole to facilitate the connection between the moving component and the passive side swing gear, so as to realize the swing drive of the passive side swing gear. The components do the opening and closing actions.

As shown in FIG. 2 , the driven side swing gear 5 is provided with a tooth surface 57 with a tooth surface angle β of 75 degrees to 90 degrees. The angle α between the working surface of the force-bearing surface and the horizontal surface is 0 to 15 degrees. The tooth profile of the passive side-swing bevel gear is approximately a right-angled trapezoid structure, and the approximately right-angled tooth surface is set as the shearing force surface when the shearing moving component is in the closing direction, and the angle between the shearing force working surface and the horizontal plane is α. It is between 0 and 15 degrees. In this embodiment, the tooth surface angle β is 75 degrees, and the shear force working surface angle α is close to about 15 degrees on the horizontal plane, so that the force direction of the passive side swing gear 5 mainly acts on On the moving assembly, the normal force of the outward deflection of the passive swing gear 5 is greatly reduced, so that the passive swing gear 5 is not easy to slip and skip teeth; of course, this angle range can be relaxed when the shear force F is small. In another embodiment, as shown in FIG. 3 , the tooth surface angle β is 80 degrees, and the shear force working surface angle α is close to 10 degrees on the horizontal plane. The tooth surfaces of the corresponding driving gears are paired and meshed with the passive swing gears.

The fixed assembly 1 is provided with a gear bracket fixing hole 11 and a rotating shaft hole 12 ; the movable assembly 2 is provided with a rotating shaft hole 21 and a fixed pin hole 22 . The setting of the gear bracket fixing hole on the fixed component is to facilitate the fixed connection between the fixed component and the gear bracket, and the setting of the rotating shaft hole is to facilitate the fixed connection between the fixed component and the rotating shaft. The rotating shaft hole is provided on the moving assembly to facilitate the rotational connection with the rotating shaft, and the fixed pin hole is to facilitate the connection of the moving assembly with the passive swing gear through the connection.

As shown in FIG. 11 , the gear bracket 3 includes a connecting body 31 and a mounting body 32 that are integrally arranged. The connecting body 31 is provided with a mounting cavity 33 inside, and the mounting body 32 has an L-shaped structure as a whole. An axial plate surface 34 and a radial plate surface 35 are provided. The connection between the axial plate surface 34 and the radial plate surface 35 is provided with a drive gear mounting hole 36 that communicates with the installation cavity. At the end of the axial plate surface 34 A fixed assembly mounting groove 37 and a shaft hole 38 perpendicular to the axial plate surface are provided at the end of the radial plate surface; In this embodiment, the gear bracket can be connected to the motor and the reducer housing through the connecting body, and the installation body can realize the installation of the driving gear, the fixed component, the moving component and the anti-skip gear component, and at the same time, the gear bracket can be connected to the anti-skid gear. The gear jumping parts are combined to form a symmetrical force-bearing structure, and the mounting body can be installed on the left or right side along the axis of the connecting body, that is, the anti-jumping gear parts can be set on the left or right side of the gear bracket in the direction of use. .

A spring mounting seat 341 and a trigger seat 342 are provided on the side of the axial plate surface 34, and 341 can also be a flat surface to automatically position the spring. The purpose of arranging the spring mounting seat and the trigger seat on the side of the axial plate surface is to facilitate the setting of the trigger and thus facilitate the operation. Of course, the trigger can also be arranged on the casing instead of the gear bracket.

The structure of the rotating shaft 6 is designed according to the coaxial arrangement structure of the gear bracket, the fixed component, the moving component, the passive side swing gear and the anti-jump gear part, including the penetrating structure from the gear bracket side and the side of the anti-jump gear part. Penetration structure. Since the passive side swing gear can be arranged on the left or right side of the gear bracket, the anti-jump tooth parts are correspondingly arranged on the left and right sides, and the rotating shaft is also correspondingly penetrated from the right side and the left side to realize the connection. Therefore, the rotating shaft can be set to different structural shapes, and the specific operations can be set according to actual needs.

As shown in FIG. 12 , in this embodiment, the rotating shaft 6 adopts a penetrating structure from the side of the gear bracket, and the rotating shaft 6 penetrates from the direction of the gear bracket, and passes through the gear bracket, the fixed blade, the movable blade, the passive side swing bevel gear, the plane thrust The bearing and anti-jump tooth parts are pierced out, and then locked with nut 6 and screws to prevent loosening. The rotating shaft 6 includes the operating end 63, the shaft outer circle K6, the rotating shaft outer thread F6, the rotating section 64 and the fastening section 65. The shaft outer circle K6 of the rotating shaft passes through the shaft hole 38 on the gear bracket and cooperates with it, and the rotating shaft outer thread F6 passes through the shaft hole 38 on the gear bracket. Passing through the shaft hole 12 of the fixed blade and threaded with the fixed blade, the rotating section 64 passes through the moving blade, the passive side-swing bevel gear, the plane thrust bearing 8 and the anti-jump tooth component to realize the rotational connection, and is connected with the rotating blade through the nut and the anti-loosening screw. The fastening section 64 is locked.

As shown in Figures 13 and 14, in this embodiment, the symmetrical force-bearing unilateral gear anti-skip mechanism is used in electric scissors as an example. Component 1 is a fixed blade, moving knife component 2 is a moving blade, the passive side swing gear is a passive side swing bevel gear, the driving gear 4 is a driving bevel gear, and the rotating shaft 6 is a cutter shaft; the driving bevel gear meshes with the passive side swing bevel gear, The passive side-swing bevel gear is connected with the moving blade through a knife pin, and the passive side-swing bevel gear drives the moving blade to open, close, and swing with the fixed blade to form a shearing mode with the cutter shaft as the rotation center. A limiter is set at the swing position of the passive side-swing bevel gear, and the limiter is a magnet to limit the position; the inner thread of the cutter shaft and the fixed blade fasten the gear bracket in the middle, while the moving blade, the passive side-swing bevel gear, The plane thrust bearing and the anti-skip tooth parts are fastened by the fastening nut and the anti-loosening screw through the cutter shaft.

In this embodiment, the passive side pendulum bevel gear is installed between the gear bracket and the anti-jump tooth part, and the outer side of the passive side pendulum bevel gear is provided with an anti-jump tooth part 7 connecting the gear bracket and the cutter shaft. The function is to prevent the gear bracket from being bent and deformed by unilateral force, and the inner surface of the anti-jump tooth component and the outer surface of the passive side swing bevel gear maintain a sufficiently small gap of about 0.2mm, forming a surface type anti-jump tooth structure for the passive side holding bevel gear. , so that when the passive side pendulum bevel gear exceeds the external force, the passive side pendulum bevel gear can be blocked from the meshing of the driving bevel gear after being stressed, and the problem of tooth skipping of the passive side pendulum bevel gear can be completely solved.

In this embodiment, the connecting end 71 of the gear bracket of the anti-jump tooth component 7 is fastened to the gear bracket 3 by bolts and nuts arranged in the fixing holes 75. The number of bolts is set according to the magnitude of the shearing force. Cutting small-diameter branches and other objects can also reduce the number of nuts and bolts; the shaft connecting end 72 is connected to the cutter shaft through the shaft hole 73, and is fastened by nuts and anti-loosening screws; in the passive side swing bevel gear and anti-jump The tooth parts are connected in a plane or by arranging a plane thrust bearing 8 to realize the connection. In this embodiment, the plane thrust bearing 8 is used to realize the connection. In another embodiment, the plane thrust bearing may not be used, and the passive side-swing bevel gear may be directly contacted with the anti-skip tooth component in plane.

For the convenience of operation, a trigger 343 and a spring 344 are also provided in another embodiment, and the trigger and spring can be provided on the gear bracket, that is, on the spring mounting seat 341 and the trigger seat 342 . It can also be set on the housing; the spring mounting seat 341 is set as a concave hole or a convex column structure (see Figure 14, Figure 15), between the spring and the trigger; 341 can also be a flat surface to automatically position the spring.

The passive side swing gear, the fixed component, and the moving component can be arranged to be installed and used on the left or right side of the scissors.

In this embodiment, an electric scissors includes a motor 100 , a speed reducer 200 and the gear anti-skip mechanism described in the above embodiments. The motor 100 is connected to the reducer 200, the reducer 200 is connected to the gear bracket 3 and the driving gear and transmits the output torque to the driving gear, the driving gear transmits the torque to the passive side swing gear, and the passive side swing gear Drive the fixed assembly to realize opening and closing. The opening and closing of the moving scissors is formed by the forward and reverse rotation of the driving bevel gear driven by the reducer and the motor.

Example 4:

As shown in FIG. 16 and FIG. 17 , in another embodiment, an electric scissors, the rotating shaft 6 is a structure that penetrates from the side of the anti-jump tooth component, and the rotating shaft 6 includes an operating end 63 , a rotating section 64 , and a hexagonal connection. segment 66 and fastening segment 65 . The rotating shaft 6 penetrates from the direction of the anti-jump tooth part 7, passes through the anti-jump tooth part, the plane thrust bearing, the passive side-swing bevel gear, the moving blade, the fixed blade and the gear bracket, and then uses the nut and the anti-loosening tooth piece 9 to prevent loosening lock. The shaft hole 38 provided on the gear bracket corresponding to the hexagonal connecting section 66 is a hexagonal shaft hole, the hexagonal connecting section 66 is matched with the hexagonal shaft hole, and a fixed knife installation boss 10 is arranged outside the hexagonal shaft hole. The shaft hole 12 of the fixed blade is matched.

Example 5:

In the embodiment shown in Fig. 18 and Fig. 19, the rotating shaft 6 is a structure penetrating from the side of the anti-skip gear part, and its specific scheme is basically the same as that of the second embodiment, the difference is: the hexagonal connection on the rotating shaft The section is set as a flat square hole section 67, the shaft hole 38 set on the gear bracket corresponding to the flat square hole section 67 is a flat square shaft hole, the flat square hole section 67 is matched with the flat square shaft hole, and a flat square shaft hole is provided outside the flat square shaft hole. The fixed blade mounting boss 10 is fitted with the rotating shaft hole 12 of the fixed blade.

Example 6:

In the embodiment shown in FIG. 20 , the technical solution is basically the same as that of Embodiment 4, except that the rotating shaft and the fixed component, that is, the fixed blade, cooperate with each other through threads, and the internal thread of the fixed blade cooperates with the external thread of the rotating shaft. The ends are fastened by anti-loosening teeth and screws.

Example 7:

In the embodiment shown in Figure 21, an electric cutting knife is mainly used in the cutting of PVC plastic water pipes installed in buildings. Its specific technical scheme is basically the same as that of the electric scissors in Embodiment 1. The fixed assembly 1 is a pipe fixing cutting member, on which is provided a pipe diameter matching groove 13 and a cutting knife groove 14 matching with the movable blade.

The anti-jumping gear mechanism described in the above embodiment is provided with an anti-jumping tooth structure on the gear pair assembly. In the structure of anti-jump teeth, the normal force of the outward deflection of the passive side pendulum gear is greatly reduced, so that the passive side pendulum gear is not easy to slip and jump teeth, so that the shear force of the passive side pendulum gear always meshes with the driving gear. Direction, that is, the shear force is effectively reduced in the reverse force between the passive side-swing gear and the driving gear, that is, the disengagement force is effectively reduced, thereby reducing the risk of gear slippage and completely solving the passive side-swing gear jump. tooth problem. Or the gear pair assembly is provided with an anti-jumping tooth structure and an anti-jumping tooth component is installed on the outside of the passive side swing gear. The double anti-jumping tooth structure and the anti-jumping tooth component are used to achieve double anti-jumping teeth. The force direction of the pendulum gear mainly acts on the moving components, which greatly reduces the normal force of the passive side pendulum gear outwards, so that the passive side pendulum gear is not easy to slip and jump teeth, and an anti-jump is installed on the outside of the passive side pendulum gear Tooth part, so that the passive side swing gear is located between the gear bracket and the anti-jump tooth part, which is arranged in a sandwich structure. The gear bracket and the anti-jump tooth part form a symmetrical force structure on both sides, which avoids the gear during the shearing or clamping process. The problem of the unilateral force of the bracket avoids the problem of bending and deformation of the gear bracket under unilateral force, and improves the stability of shearing or clamping; while the outer side of the passive side swing gear and the inner side of the anti-jump gear part are provided with a Clearance, the inner side of the anti-skip gear part and the outer side of the passive side swing gear maintain a sufficiently small gap, which will not affect the opening and closing of the driving component driven by the passive side swing gear, and can completely solve the problem of the passive side swing gear. The tooth part can block the passive side swing gear when it is sheared and stressed, so that it is always meshed with the driving gear, and there will be no slipping and jumping teeth, so as to ensure the normal opening and closing work.

The electric shear pliers tool directly solves the maintenance troubles of fruit farmers, garden trimming, construction (PVC plastic) water pipe cutting, pliers operations and other related workers due to scissors, pliers opening and closing tools can not work due to jumping teeth. The scope of use of the tool can be changed by replacing the fixed and or movable components. For example, it can be set as a fixed blade, and the moving blade can be assembled into an electric scissors. Changing the fixed blade can make the electric scissors change into an electric cutting knife applied to the installation of PVC plastic water pipes in buildings. , and can also be a variety of other opening and closing tools for various industries that require opening and closing actions. For example, it can be replaced with a tool such as a clamp body, or an animal ear marking jig, a branch grafting jig and other tools for opening and closing.

In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. The present invention is also not limited to the examples described above, and changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention should be regarded as the protection scope of the present invention.

Claims (10)

1. A gear pair, comprising a driving gear (4) and a passive swing gear (5) that mesh with each other, characterized in that: the driving gear (4) and the passive swing gear (5) are provided with anti-jumping Tooth structure, the anti-jump tooth structure is a tooth surface (57) with a tooth surface angle (β) of 75 degrees to 90 degrees. The angle (α) between the working face under stress and the working face under shear stress and the horizontal plane is 0 to 15 degrees. 2. A gear pair according to claim 1, characterized in that: the driving gear (4) is a driving bevel gear, and the driving gear (4) comprises a spiral bevel gear and a straight bevel gear; The passive swing gear (5) is a passive swing bevel gear, and the passive swing gear (5) includes a spiral bevel gear and a straight bevel gear. 3. A gear anti-skip mechanism with a gear pair according to claim 1, characterized in that it comprises a gear bracket (3), a fixed gear set on the gear bracket (3) and meshed and opened and closed by the gear pair. In the component (1) and the moving component (2), the tooth surface forming the anti-jump tooth structure on the passive side swing gear is the shearing force working surface when the moving component moves toward the closing direction. 4. The gear anti-jumping mechanism according to claim 3, characterized in that: an anti-jumping tooth component (7) is provided on the outside of the passive side swing gear (5), and the anti-jumping tooth component (7) ) and the gear bracket (3) form a symmetrical force-bearing structure. 5. The gear anti-skip mechanism according to claim 4, characterized in that: the anti-skip component (7) comprises a gear bracket connecting end (71) and a rotating shaft connecting end (72) that are integrally provided, and the gear holder connecting end (72) is integrally provided. The connecting end (72) of the rotating shaft is provided with a shaft hole (73), and the connecting end (71) of the gear bracket is provided with a plurality of fixing holes (75); The passive side swing gears are in contact with each other through a plane contact or through a plane thrust bearing (8); the inner side of the gear bracket connection end (71) of the anti-jump tooth component (7) and the outer side of the passive side swing gear (5) There is a gap between them. 6 . The gear anti-skip mechanism according to claim 3 , wherein the driving gear ( 4 ) is a driving bevel gear, and the driving gear ( 4 ) comprises a spiral bevel gear and a straight bevel gear. 7 . ; The driving gear (4) is installed on the gear bracket (3) and is connected with the power mechanism in a force-transmitting manner, and the moving component (2) is connected with the passive side swing gear (5) and is connected by a rotating shaft (6) Rotately connect with the gear bracket (3). 7 . The gear anti-skip mechanism according to claim 3 , wherein the driven side-swing gear ( 5 ) is a passive side-swing bevel gear, and the passive side-swing gear ( 5 ) comprises a spiral bevel gear. 8 . gears and straight bevel gears; the passive side swing gear (5) is provided with a gear end (51) and a swing end (52) in a pendulum structure, and the gear end (51) is connected to the driving gear (4) Meshing, a limiting hole (53) is provided on the gear end (51), a limiting member (54) is provided inside the limiting hole (53); the swing end (52) is provided with a shaft connecting hole (55) and the connecting hole (56) of the moving assembly. 8. The gear anti-skip mechanism according to any one of claims 3 to 7, characterized in that: the fixed assembly (1) is provided with a gear bracket fixing hole (11) and a rotating shaft hole (12); The moving assembly (2) is provided with a rotating shaft hole (21) and a fixing pin hole (22). 9 . The gear anti-skip mechanism according to any one of claims 3 to 7 , wherein the gear bracket ( 3 ) comprises a connecting body ( 31 ) and a mounting body ( 32 ) that are integrally arranged, so that the The connecting body (31) is provided with a mounting cavity (33) inside, and the mounting body (32) is provided with an axial plate surface (34) and a radial plate surface (35) in an L-shaped structure as a whole. A drive gear mounting hole (36) that communicates with the mounting cavity (33) is opened at the connection between the axial plate surface (34) and the radial plate surface (35), and a fixed assembly is provided at the end of the axial plate surface (34). A mounting groove (37) and a shaft hole (38) perpendicular to the axial plate surface; the end surface of the radial plate surface (35) is provided with a mounting surface (39) for the anti-jump tooth component; on the axial plate surface (34) ) is provided with a spring mounting seat (341) and a trigger seat (342). 10. An electric scissor-type tool, characterized in that it comprises a motor (100), a reducer (200) and the gear anti-skip mechanism according to any one of claims 3 to 7; the motor (100) A reducer (200) is connected, the reducer (200) is connected to the gear bracket (3) and the driving gear (4) and transmits the output torque to the driving gear (4), and the driving gear (4) transmits the torque The passive side swing gear (5) is supplied to the passive side swing gear (5) to drive the fixed assembly to open and close.

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