CN114607735A

CN114607735A - Gear pair, gear anti-bouncing gear mechanism and electric scissors pincer type tool

Info

Publication number: CN114607735A
Application number: CN202210061807.0A
Authority: CN
Inventors: 吕一飞
Original assignee: Yongkang Qingjiang Technology Co ltd
Current assignee: Yongkang Qingjiang Technology Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-06-10

Abstract

The invention discloses a gear pair, which comprises a driving gear and a driven side-sway gear which are mutually meshed, wherein anti-jumping tooth structures are arranged on the driving gear and the driven side-sway gear, the anti-jumping tooth structures are tooth surfaces with tooth surface angles of 75-90 degrees, the tooth surfaces on the driven side-sway gear are shearing stress working surfaces when the driven side-sway gear is in swing meshing, and an included angle between the shearing stress working surfaces and a horizontal plane is 0-15 degrees. Also discloses a gear jumping-proof mechanism and an electric scissors type tool. This tooth mechanism is prevented jumping by gear, thereby very big reduction the outside inclined to one side normal force of passive sidesway gear makes the gear of the sidesway of passive gear difficult slipping jump the tooth for passive sidesway gear is cuted the atress all the time towards with driving gear meshing direction, and the shearing force is effectively reduced at passive sidesway gear and the reverse power of driving gear meshing promptly, just also breaks away from the power of meshing and is effectively reduced, thereby has reduced the risk that the gear skidded, has thoroughly solved the problem of the gear of the sidesway gear of passive.

Description

Gear pair, gear anti-jumping mechanism and electric shear jaw type tool

Technical Field

The invention belongs to the technical field of gear transmission, and particularly relates to a gear pair, a gear anti-jumping mechanism and an electric shear and clamp type tool.

Background

Gear drive formula working tool that opens and shuts, be the working tool that people used commonly, but because open-close type working tool need bear external force and then realize functions such as shearing in the use, consequently, external force is too big makes the gear skid under the atress effect very easily, cause the jump tooth, and lead to the unable normal use scheduling problem of worker, for example, an electric scissors for forestry and planting industry pruning usefulness, under the normal condition, when cuting less branch, through electric scissors, can cut unnecessary branch fast, and is convenient laborsaving, but if cut great branch, then because external force is too big, can cause the gear to take off the tooth problem etc. promptly, current electric scissors is driven the side pendulum bevel gear when working method and is slided the jump tooth easily when cuting the atress and make the scissors unable work. Moreover, the existing opening and closing tools are set according to specifications, one opening and closing tool can only meet the operation requirements of the same operation or the same specification, and the requirement of realizing universal design by quickly replacing opening and closing parts, such as shearing blades, cannot be realized.

For example, chinese patent document (publication No. CN212910875U, 4/9/2021) discloses a single-blade electric scissors with tooth jumping prevention function, which comprises a support, a swing tooth rotatably mounted on the support, a movable blade mounted on the swing tooth and driven by the swing tooth to rotate, a fixed blade fixed on the support and adapted to the movable blade, a bevel gear and a driving device for driving the swing tooth to swing, wherein a tooth jumping prevention screw is spirally mounted on a side surface of the support, an end of the tooth jumping prevention screw is exposed on an inner side surface of the support, and a gap is formed between the screw and an outer side surface of the swing tooth. When the branches with larger size are cut, the movable blade can be subjected to a large normal force and deflect outwards, so that the swing teeth can also deflect outwards to deform, at the moment, the outer side faces of the swing teeth can be contacted with the end parts of the anti-jumping teeth screws to play a supporting role, the swing teeth are prevented from losing efficacy when deforming to a height exceeding the meshing height of the bevel gears, the anti-jumping teeth screws are used for effectively limiting the swing teeth, the meshing of the swing teeth and the bevel gears is guaranteed, and the phenomenon of tooth jumping is prevented.

Above-mentioned technical scheme prevents jumping the tooth phenomenon through setting up to prevent jumping the tooth screw and realize preventing appearing, but this technical scheme prevents jumping the tooth screw for this kind and is that the point type atress prevents jumping the tooth, receives very big normal force when outwards leaning on at the movable blade, and the pendulum tooth is outwards leaning on, prevents jumping the tooth screw this moment and realizes the point type support to the pendulum tooth, can lead to pendulum tooth single-point atress, and the atress is uneven, still can have the pendulum tooth atress and produce the swing, has to jump tooth and deformation risk.

Disclosure of Invention

The invention aims to solve the problems that the conventional gear pair is easy to slip in the gear transmission process to cause the phenomenon of tooth skipping, and the gear transmission type scissors or pliers opening and closing operation tools are easy to slip in the use process to cause the phenomenon of tooth skipping to influence the normal use of the tools, and meanwhile, the problems that the conventional tooth skipping prevention structure is stressed at a single point and is not uniform in stress and cannot really solve the problem of tooth skipping prevention are solved; in addition, a gear jumping prevention mechanism is also provided, and the swinging teeth are uniformly stressed through the tooth shape of the gear pair and the tooth jumping prevention mechanism formed by the surface contact type tooth jumping prevention components independently or jointly, so that the phenomenon of tooth jumping can be effectively avoided; simultaneously, still provide a gear that can quick replacement part and prevent jumping tooth mechanism and electronic cutting, jaw type instrument.

The technical scheme adopted by the invention for realizing the first invention purpose is as follows: a gear pair comprises a driving gear and a driven side-sway gear which are meshed with each other, wherein anti-bouncing tooth structures are arranged on the driving gear and the driven side-sway gear, the anti-bouncing tooth structures are tooth surfaces with tooth surface angles of 75-90 degrees, the tooth surfaces on the driven side-sway gear are shearing stress working surfaces when the driven side-sway gear is in swing meshing, and an included angle between the shearing stress working surfaces and a horizontal plane is 0-15 degrees. This gear pair, set up the flank of tooth of preventing jumping through the cooperation on driving gear and driven gear, this flank of tooth is approximate right trapezoid structure, make driven side pendulum gear's atress direction mainly act on this flank of tooth, thereby very big reduction driven side pendulum gear outside inclined to one side normal force makes driven side pendulum gear be difficult for the jump tooth of skidding, make driven side pendulum gear shear stress all the time towards with driving gear meshing direction, the shearing force is effectively reduced at driven side pendulum gear and the reverse power of driving gear meshing promptly, just also the power that breaks away from the meshing is effectively reduced, thereby the risk that the gear skidded has been reduced, driven side pendulum gear jumping problem has thoroughly been solved.

Preferably, the driving gear is a driving bevel gear and comprises a spiral bevel gear and a straight bevel gear; the driven side-sway gear is a driven side-sway bevel gear and comprises a spiral bevel gear and a straight bevel gear.

The technical scheme adopted by the invention for realizing the second invention purpose is as follows: the utility model provides a gear anti-bouncing tooth mechanism with gear pair, includes gear bracket, sets up on gear bracket and through gear pair meshing formula open and shut decide subassembly and move the subassembly, the flank of tooth that forms anti-bouncing tooth structure on passive sidesway gear is the shearing atress working face when moving the subassembly toward the direction of closing. This tooth mechanism is prevented jumping by gear, be provided with on the gear pair and prevent jumping the tooth structure, prevent jumping the tooth structure and make passive sidesway gear and driving gear meshing receive the shearing force when, the atress direction of shearing force is used in preventing jumping the tooth structure, thereby very big reduction passive sidesway gear outside inclined normal force makes the difficult tooth that jumps of passive sidesway gear, make passive sidesway gear shearing atress all the time towards and driving gear meshing direction, the shearing force is effectively reduced at passive sidesway gear and the reverse power of driving gear meshing promptly, just also the power that breaks away from the meshing is effectively reduced, thereby the risk that the gear skidded has been reduced, driven sidesway gear tooth problem of jumping has thoroughly been solved. The tooth profile of the driven side-swinging bevel gear is arranged to be of an approximate right-angled trapezoid structure, the tooth surface of the approximate right angle is arranged to be a shearing stress working surface when a shearing moving assembly shears towards the closed direction, and the included angle between the shearing stress working surface and the horizontal plane is 0-15 degrees, so that the stress direction of the driven side-swinging bevel gear mainly acts on the moving assembly, and the outward-biased normal force of the driven side-swinging bevel gear is greatly reduced, so that the driven side-swinging bevel gear is not easy to slip and jump; of course, this angular range can be relaxed in the case of small shear forces. The driving gear is correspondingly provided with a tooth surface which is of an approximate right trapezoid structure so as to be matched with the driven side-sway gear to be meshed with each other.

Preferably, an anti-jumping tooth component is arranged on the outer side of the driven side swinging gear, and a gap is formed between the inner side surface of the anti-jumping tooth component and the outer side surface of the driven side swinging gear; the anti-jumping component and the gear bracket form a symmetrical stress structure. The anti-jumping tooth part is arranged on the outer side of the driven side-swinging gear, double anti-jumping teeth are realized through the anti-jumping tooth structure and the anti-jumping tooth part, the driven side-swinging gear is positioned between the gear support and the anti-jumping tooth part through the anti-jumping tooth part, and the gear support and the anti-jumping tooth part form a bilaterally symmetrical stress structure, so that the problem of bending deformation caused by single-side stress of the gear support in the shearing process is solved, and the shearing stability is improved; the inner side face of the anti-jumping tooth part and the outer side face of the driven side-swinging gear keep a small enough gap, when the driven side-swinging gear is deformed in advance under the action of a large external force, the small enough gap enables the outer side face of the driven side-swinging gear to be attached to the inner side face of the anti-jumping tooth part, and the driven side-swinging gear is prevented from deforming outwards to jump teeth through surface-face matching.

Preferably, the tooth jumping prevention part comprises a gear bracket connecting end and a rotating shaft connecting end which are integrally arranged, the rotating shaft connecting end is provided with a shaft hole, and the gear bracket connecting end is provided with a plurality of fixing holes; the rotating shaft connecting end of the tooth jumping prevention part is in plane contact with the driven side-sway gear or in contact with the driven side-sway gear through a plane thrust bearing; a gap is arranged between the inner side face of the connecting end of the gear bracket of the anti-skip gear component and the outer side face of the driven side-swinging gear. Prevent jumping preferred symmetry atress of tooth part and prevent jumping tooth connecting rod, prevent jumping tooth part above-mentioned structure both conveniently to be connected with the pivot through the shaft hole, thereby realize with passive side pendulum gear and move the coaxial setting of subassembly, simultaneously, thereby it forms U-shaped symmetrical atress structure with gear bracket through fastener and gear bracket connection to set up a plurality of fixed orificess at gear bracket link end, and this kind of U-shaped symmetrical atress structure still conveniently decides the subassembly and moves the quick replacement of subassembly, and need not dismantle symmetrical atress and prevent jumping tooth and connect just can realize moving the subassembly and deciding the change of subassembly, in order to realize the design of commonality structure. The gap between the outer side face of the driven side-sway gear and the inner side face of the anti-jumping gear part is small enough, the size of each part can be set when the gap is machined, and the installation sizes of different opening and closing parts are corresponding.

Preferably, the driving gear is a driving bevel gear, and the driving gear comprises a spiral bevel gear and a straight bevel gear. The driving gear is arranged on the gear support and is in force transmission connection with the power mechanism, and the moving assembly is connected with the driven side swing gear and is in rotating connection with the gear support through a rotating shaft.

Preferably, the driven side-sway gear is a driven side-sway bevel gear, and the driven side-sway gear comprises a spiral bevel gear and a straight bevel gear; the driven side swinging gear is in a swinging rod type structure and is provided with a gear end and a swinging end, the gear end is meshed with the driving gear, a limiting hole is formed in the gear end, and a limiting part is arranged in the limiting hole; the swing end is provided with a rotating shaft connecting hole and a movable assembly connecting hole. The limiting piece is arranged to limit the swing position of the driven side swing gear, and is generally limited by a magnet. The swing end is provided with a rotating shaft connecting hole for realizing coaxial connection with the moving assembly through rotation, and the moving assembly connecting hole is arranged for facilitating the connection of the moving assembly and the driven side swing gear, so that the swing of the driven side swing gear drives the moving assembly to open and close.

Preferably, the fixed component is provided with a gear bracket fixing hole and a rotating shaft hole; the movable component is provided with a rotary shaft hole and a fixed pin hole. The gear bracket fixing hole is arranged on the fixed component to facilitate the fixed connection of the fixed component and the gear bracket, and the rotating shaft hole is arranged to facilitate the fixed connection of the fixed component and the rotating shaft through threads. The movable component is provided with a rotating shaft hole for facilitating the rotating connection with the rotating shaft, and the fixed pin hole is used for facilitating the connection of the movable component and the driven side-swinging gear.

Preferably, the gear support comprises a connecting body and an installation body which are integrally arranged, an installation cavity is arranged in the connecting body, the installation body is integrally L-shaped and is provided with an axial plate surface and a radial plate surface, a driving gear installation hole communicated with the installation cavity is formed in the joint of the axial plate surface and the radial plate surface, and a fixed assembly installation groove and a shaft hole perpendicular to the axial plate surface are formed in the end part of the axial plate surface; the end face of the radial plate surface is provided with a tooth jumping prevention component mounting surface. Above-mentioned structure of gear support, can be connected with motor and reduction gear housing through the connector, can realize the driving gear through the installation body, decide the subassembly, move the subassembly and prevent jumping the installation of tooth part, can also make gear support and prevent jumping the tooth part combination and form symmetrical atress structure simultaneously, this symmetrical atress structure can effectively realize the unilateral gear of passive sidesway gear and prevent jumping the tooth, and the installation body can be along the axis of connector and be left side formula installation or right side formula installation, prevent jumping tooth part promptly and can be with the left side or the right side that use direction set up at gear support.

Preferably, a spring mount and a trigger base are provided on a side surface of the axial plate surface. The spring mounting seat and the trigger seat are arranged on the side face of the axial plate face to facilitate the arrangement of the trigger, so that the trigger is convenient to operate, and of course, the trigger can be arranged on the shell instead of the gear support.

Preferably, the rotating shaft structure is designed according to coaxial arrangement structures of the gear bracket, the fixed assembly, the movable assembly, the driven side swinging gear and the anti-jumping tooth component, and comprises a structure penetrating from the side of the gear bracket and a structure penetrating from the side of the anti-jumping tooth component. Because the driven side swing gear can be arranged on the left side or the right side of the gear bracket, the anti-jumping gear component is correspondingly arranged on the left side and the right side, and the rotating shaft correspondingly penetrates from the right side and the left side to realize connection. Therefore, the rotating shaft can be set to different structural shapes, and the specific operation is set according to the actual requirement.

The technical scheme adopted by the invention for realizing the third invention purpose is as follows: an electric cutting nipper type tool comprises a motor, a speed reducer and a gear anti-jumping mechanism.

Preferably, the motor is connected with a speed reducer, the speed reducer is connected with the gear support and the driving gear and transmits output torque to the driving gear, the driving gear transmits the torque to the driven side-swinging gear, and the driven side-swinging gear drives the fixed assembly to realize opening and closing.

The electric cutting nipper type tool comprises a motor, a speed reducer, a fixed assembly and a movable assembly, wherein the motor, the speed reducer, the driving gear, the driven side-swinging gear and the movable assembly are arranged in a shell, the motor is connected with the speed reducer, the speed reducer is connected with the driving gear and transmits output torque, the driving gear transmits the torque to the driven side-swinging gear, the driven side-swinging gear and the movable assembly connected with the driven side-swinging gear are opened and closed to swing by taking a rotating shaft as a rotating center, the movable assembly and the fixed assembly form a cutting mode or a nipper type mode, the rotating shaft and the fixed assembly fasten a gear support in the middle, and the movable assembly, the driven side-swinging bevel gear and the anti-jumping tooth assembly penetrate through the rotating shaft and are fastened by a fastening nut and a locking screw, so that opening and closing tools such as electric scissors or electric nippers are formed. This electronic cutting nipper formula instrument owing to set up and prevent jumping the tooth structure or be provided with and prevent jumping tooth structure and prevent jumping this kind of dual tooth mechanism of jumping of tooth part, has thoroughly solved passive side pendulum gear and has jumped the tooth problem, makes it mesh with the driving gear all the time, and the tooth that jumps that can not appear skidding guarantees normal work that opens and shuts.

The invention has the beneficial effects that: this gear pair, the tooth mechanism is prevented jumping by the gear, the problem that the gear jumped the tooth has thoroughly been solved, prevent jumping the tooth structure and make passive sidesway gear and driving gear meshing receive the shearing force when, the atress direction of shearing force is used in preventing jumping the tooth structure, thereby the very big outside inclined to one side normal force of passive sidesway gear that has reduced makes the difficult tooth of jumping of skidding of passive sidesway gear, make passive sidesway gear shearing atress orientation and driving gear meshing direction all the time, the shearing force is effectively reduced at passive sidesway gear and the reverse power of driving gear meshing promptly, just also the power that breaks away from the meshing is effectively reduced, thereby the risk that the gear skidded has been reduced, driven sidesway gear jumping tooth problem has thoroughly been solved. The anti-skipping component and the gear support form a U-shaped symmetrical stress structure, so that the single-side stress bending deformation of the gear support is prevented, a small enough gap is kept between the anti-skipping component and the outer side of the driven side-swinging gear, the driven side-swinging gear can be blocked when the external force is exceeded, the driven side-swinging bevel gear is always meshed with the driving gear after being stressed, no skipping is generated, the design of the face type anti-skipping structure of the driven side-swinging gear is realized, and the problem of skipping of the driven side-swinging gear is thoroughly solved; and can directly solve the maintenance troubles of related workers such as fruit growers, garden pruning, building water pipe shearing, pliers operation and the like caused by the fact that the scissors and pliers opening and closing tools cannot work due to tooth jumping.

Drawings

FIG. 1 is a schematic view of one embodiment of the gear pair of the present invention;

FIG. 2 is a schematic structural view of an anti-bouncing tooth structure of the present invention;

FIG. 3 is a schematic view of another embodiment of the anti-skip tooth structure of the present invention;

FIG. 4 is a schematic view of a gear anti-skipping mechanism of the present invention;

FIG. 5 is a schematic view of an exploded view of the anti-skip gear mechanism of the gear of the present invention;

FIG. 6 is a schematic structural view of a gear tooth skip prevention mechanism in embodiment 3 of the invention;

FIG. 7 is a schematic exploded view of the anti-backlash mechanism of the gear in embodiment 3 of the present invention;

FIG. 8 is a schematic view of a driving gear meshing with a driven sidesway gear in accordance with the present invention;

FIG. 9 is a schematic view of one construction of the anti-skip tooth assembly of the present invention;

FIG. 10 is a schematic view of a passive side-swinging gear of the present invention;

FIG. 11 is a schematic view of a gear rack of the present invention;

FIG. 12 is a schematic view of a construction of a rotating shaft according to the present invention;

FIG. 13 is a schematic view of the electric shears of the present invention in an open or closed position;

FIG. 14 is a schematic view showing a closed state of the electric shears of the present invention;

FIG. 15 is a second structural schematic of the gear holder of the present invention;

FIG. 16 is a schematic view of an exploded electric scissors according to embodiment 4 of the present invention;

FIG. 17 is a schematic view showing a structure of a rotary shaft in embodiment 4 of the present invention;

FIG. 18 is a schematic view showing an exploded structure of electric scissors according to embodiment 5 of the present invention;

FIG. 19 is a schematic view showing a structure of a rotary shaft in embodiment 5 of the present invention;

FIG. 20 is a schematic view showing an exploded structure of electric scissors according to embodiment 6 of the present invention;

fig. 21 is a schematic structural view of an electric cutting knife (for installing a PVC plastic pipe in a building) in embodiment 7 of the present invention;

in the figure: 1. the fixed component, 11, a gear bracket fixing hole, 12, a rotating shaft hole, 13, a pipe diameter matching groove, 14, a cutting knife groove, 2, a moving component, 21, a rotating shaft hole, 22, a fixing pin hole, 3, a gear bracket, 31, a connecting body, 32, an installation body, 33, an installation cavity, 34, an axial plate surface, 341, a spring installation seat, 342, a trigger seat, 343, a trigger, 344, a spring, 35, a radial plate surface, 36, a driving gear installation hole, 37, a fixed component installation groove, 38, a shaft hole, 39, an anti-jumping tooth part installation surface, 4, a driving gear, 5, a driven side swinging gear, 51, a gear end, 52, a swinging end, 53, a limiting hole, 54, a limiting part, 55, a rotating shaft connecting hole, 56, a moving component connecting hole, 57, a tooth surface, 6, a rotating shaft, 63, an operation end, K6, an outer shaft circle, F6, a rotating shaft outer thread, 64, a rotating section, 65, a fastening section, 66, a moving component, a gear box, a gear box, a gear box, a gear, The anti-jumping gear comprises a hexagonal connecting section 67, a flat square hole section 7, an anti-jumping gear part 71, a gear support connecting end 72, a rotating shaft connecting end 73, a shaft hole 75, a fixing hole 8, a plane thrust bearing 9, a locking tooth piece 10, a fixed cutter mounting boss 100, a motor 200, a speed reducer beta, a tooth surface angle alpha and an included angle.

Detailed Description

The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.

Example 1:

in the embodiment shown in fig. 1, 2, and 3, a gear pair includes a driving gear 4 and a driven side-sway gear 5 that are engaged with each other, the driving gear 4 and the driven side-sway gear 5 are provided with an anti-bouncing tooth structure, the anti-bouncing tooth structure is a tooth surface 57 with a tooth surface angle β of 75 degrees to 90 degrees, the tooth surface on the driven side-sway gear is a shearing force-receiving working surface when the driven side-sway gear is in swing engagement, and an included angle α between the shearing force-receiving working surface and a horizontal plane is 0 degree to 15 degrees. 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 driven side-sway gear 5 is a driven side-sway bevel gear, and the driven side-sway gear 5 comprises a spiral bevel gear and a straight bevel gear.

As shown in fig. 2, the driven side-sway gear 5 is provided with a tooth surface 57 with a tooth surface angle β of 75 to 90 degrees, the tooth surface 57 is a shearing force-bearing surface when the driven side-sway gear is in swing engagement, and an included angle α between a working surface of the shearing force-bearing surface and a horizontal plane is 0 to 15 degrees. The tooth profile of the driven side-swinging bevel gear is in an approximate right-angled trapezoid structure, the tooth surface of the approximate right angle is a shearing stress surface during swing engagement, the included angle alpha between the shearing stress surface angle and the horizontal plane is 0-15 degrees, in the embodiment, the tooth surface angle beta is 75 degrees, the shearing stress surface angle alpha is close to about 15 degrees of the horizontal plane, and the outward-biased normal force of the driven side-swinging gear 5 is greatly reduced, so that the driven side-swinging gear 5 is not easy to slip and jump; of course, this angular range can be widened in the case where the shearing force F is small. In another embodiment, shown in FIG. 3, the tooth flank angle β is 80 degrees and the shear force face angle α is 10 degrees closer to the horizontal. The tooth surface of the corresponding driving gear is in matched meshing with the driven side-sway gear.

Example 2:

in the embodiment shown in fig. 4 and 5, a gear anti-jumping mechanism is suitable for various opening and closing tools in various industries needing opening and closing actions, and comprises a gear bracket 3, a gear pair component, a fixed component 1 and a movable component 2 which are arranged on the gear bracket 3 and are engaged and opened and closed through the gear pair component, the gear pair assembly comprises a driving gear 4 and a driven side swinging gear 5 meshed with the driving gear 4, the fixed component 1 is fixed on the gear bracket 3, the movable component 2 is connected with the driven side swing gear 5 and is rotationally connected with the gear bracket 3 through a rotating shaft 6, the gear pair component is provided with an anti-jumping tooth structure, the anti-jumping tooth structure is a tooth surface 57 with a tooth surface angle beta of 75-90 degrees, the tooth surface on the driven side-sway gear is a shearing stress working surface when the movable assembly moves towards the closed direction, and the included angle alpha between the shearing stress working surface and the horizontal plane is 0-15 degrees. So that the stress direction of the driven side swinging gear 5 mainly acts on the movable assembly, and the outward deviation normal force of the driven side swinging gear 5 is greatly reduced, so that the driven side swinging gear 5 is not easy to slip and jump.

As shown in fig. 2, the driven side-swinging gear 5 is provided with a tooth surface 57 with a tooth surface angle β of 75-90 degrees, the tooth surface 57 is a shearing force-bearing surface when the moving assembly moves towards the closing direction, and an included angle α between a working surface of the shearing force-bearing surface and a horizontal plane is 0-15 degrees. The tooth profile of the driven side-sway bevel gear is arranged to be of an approximate right-angled trapezoid structure, the tooth surface of the approximate right angle is a shearing stress surface when a shearing moving assembly moves towards the closed direction, the included angle alpha between the shearing stress working surface angle and the horizontal plane is 0-15 degrees, in the embodiment, the tooth surface angle beta is 75 degrees, and the shearing stress working surface angle alpha is close to the horizontal plane for about 15 degrees, so that the stress direction of the driven side-sway gear 5 mainly acts on the moving assembly, and the outward-biased normal force of the driven side-sway gear 5 is greatly reduced, so that the driven side-sway gear 5 is not easy to slip and jump; of course, this angular range can be widened in the case where the shearing force F is small. In another embodiment, shown in FIG. 3, the tooth flank angle β is 80 degrees and the shear force face angle α is 10 degrees closer to the horizontal. The tooth surface of the corresponding driving gear is in matched meshing with the driven side-sway gear.

Example 3:

in the embodiment shown in fig. 6, 7 and 8, a gear anti-jumping mechanism is suitable for various opening and closing tools in various industries needing opening and closing actions, and comprises a gear support 3, a gear pair assembly, a fixed assembly 1 and a movable assembly 2 which are arranged on the gear support 3 and are engaged and opened through the gear pair assembly, wherein the gear pair assembly comprises a driving gear 4 and a driven side swinging gear 5 engaged with the driving gear 4, the fixed assembly 1 is fixed on the gear support 3, the movable assembly 2 is connected with the driven side swinging gear 5 and is rotationally connected with the gear support 3 through a rotating shaft 6, an anti-jumping gear structure is arranged on the gear pair assembly, an anti-jumping gear part 7 is arranged on the outer side of the driven side swinging gear 5, and a gap is arranged between the inner side surface of the anti-jumping gear part 7 and the outer side surface of the driven side swinging gear 5; the anti-jumping tooth part 7 and the gear bracket 3 form a symmetrical stress structure. The tooth jumping prevention structure is a tooth surface 57 with a tooth surface angle beta of 75-90 degrees, a shearing stress surface is formed on the driven side-sway gear when the tooth surface is in a closed direction of the movable assembly, and an included angle alpha between a working surface of the shearing stress surface and a horizontal plane is 0-15 degrees. So that the stress direction of the driven side swinging gear 5 mainly acts on the movable assembly, and the outward deviation normal force of the driven side swinging gear 5 is greatly reduced, so that the driven side swinging gear 5 is not easy to slip and jump;

as shown in fig. 9, the anti-jumping tooth component in this embodiment is a symmetrical stressed 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, which are integrally arranged, the rotating shaft connecting end 72 is provided with a shaft hole 73, and the gear bracket connecting end 71 is provided with a plurality of fixing holes 75. The rotating shaft connecting end of the tooth jumping prevention component 7 is in plane contact with the driven side-sway gear or in contact with the driven side-sway gear through a plane thrust bearing; preferably in this embodiment by means of a flat thrust bearing 8. A gap is arranged between the inner side surface of the gear support connecting end 71 of the tooth jumping prevention component 7 and the outer side surface of the driven side swinging gear 5. Prevent jumping the tooth part through the setting and make it form U type symmetry atress structure with gear support, the gear support link setting of preventing jumping the tooth part in this embodiment is T type structure, and pivot link setting is circularly, conveniently be connected with the pivot through the shaft hole, realize with passive side pendulum gear and move the coaxial setting of subassembly, and simultaneously, thereby it forms U-shaped symmetry atress structure with gear support through fastener and gear support connection to set up a plurality of fixed orificess at gear support link, a plurality of fixed orificess can be according to the atress needs and select the quantity of connecting, U-shaped symmetry atress structure still conveniently decides the subassembly and moves the quick replacement of subassembly, and need not dismantle the symmetry atress and prevent jumping the tooth and connect just can realize moving the subassembly and deciding the change of subassembly, in order to realize the design of commonality 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 arranged on the gear bracket 3 and is in force transmission connection with the power mechanism.

As shown in fig. 10, the driven side-swing gear 5 is a driven side-swing bevel gear, and the gear pair of the driven side-swing gear 5 includes a spiral bevel gear and a straight bevel gear. The driven side swinging gear 5 is provided with a gear end 51 and a swinging end 52 in a swinging rod type structure, the gear end 51 is meshed with the driving gear 4, the gear end 51 is provided with a limiting hole 53, and a limiting part 54 is arranged in the limiting hole 53; the swing end 52 is provided with a rotating shaft connecting hole 55 and a movable assembly connecting hole 56. In order to limit the swing position of the driven side-swing gear, a limiting member is provided, and in this embodiment, the limiting member employs a magnet. In the installation process, the rotating shaft connecting hole of the swinging end is coaxially connected with the moving assembly, and meanwhile, the driven side swinging gear is provided with a moving assembly connecting hole so as to be convenient for the connection of the moving assembly and the driven side swinging gear, so that the swinging of the driven side swinging gear drives the moving assembly to do opening and closing actions.

The fixed component 1 is provided with a gear bracket fixing hole 11 and a rotating shaft hole 12; the movable component 2 is provided with a rotary shaft hole 21 and a fixed pin hole 22. The gear bracket fixing hole is arranged on the fixed component to facilitate the fixed connection of the fixed component and the gear bracket, and the rotating shaft hole is arranged to facilitate the fixed connection of the fixed component and the rotating shaft through threads. The movable component is provided with a rotating shaft hole for facilitating the rotating connection with the rotating shaft, and the fixed pin hole is used for facilitating the connection of the movable component and the driven side-swinging gear.

As shown in fig. 11, the gear bracket 3 includes a connecting body 31 and an installation body 32 that are integrally arranged, an installation cavity 33 is arranged inside the connecting body 31, the installation body 32 is integrally provided with an axial plate surface 34 and a radial plate surface 35 in an L-shaped structure, a driving gear installation hole 36 communicated with the installation cavity is formed at a joint of the axial plate surface 34 and the radial plate surface 35, and a fixed assembly installation groove 37 and a shaft hole 38 perpendicular to the axial plate surface are arranged at an end of the axial plate surface 34; the end face of the radial plate surface 35 is provided with a tooth jumping prevention component mounting surface 39. In this embodiment, gear bracket passes through the connector and can be connected with motor and reduction gear housing, can realize the installation to the driving gear through the installation body, decide the subassembly, move the subassembly and prevent jumping tooth part, can also make gear bracket and prevent jumping tooth part combination form symmetrical atress structure simultaneously, and the installation body can be along the axis of connector left side formula installation or right side formula installation, prevents jumping tooth part promptly and can be with the left side or the right side that use direction set up at gear bracket.

The spring mount 341 and the trigger seats 342, 341 may be flat surfaces on the side of the axial plate surface 34 to automatically position the spring. The spring mounting seat and the trigger seat are arranged on the side face of the axial plate face to facilitate the arrangement of the trigger, so that the trigger is convenient to operate, and of course, the trigger can be arranged on the shell instead of the gear support.

The structure of the rotating shaft 6 is designed according to the coaxial arrangement structure of the gear bracket, the fixed component, the movable component, the driven side-swinging gear and the anti-jumping gear component, and comprises a side penetrating structure from the gear bracket and a side penetrating structure from the anti-jumping gear component. Because the driven side swing gear can be arranged on the left side or the right side of the gear bracket, the anti-jumping gear component is correspondingly arranged on the left side and the right side, and the rotating shaft correspondingly penetrates from the right side and the left side to realize connection. Therefore, the rotating shaft can be set to different structural shapes, and the specific operation is set according to the actual requirement.

As shown in fig. 12, in the present embodiment, the rotating shaft 6 adopts a structure of penetrating from the gear rack side, and the rotating shaft 6 penetrates from the gear rack direction, penetrates through the gear rack, the fixed blade, the movable blade, the driven side-swing bevel gear, the plane thrust bearing and the anti-jumping tooth part, and is locked in an anti-loose manner by the nut 6 and the screw. The rotating shaft 6 comprises an operating end 63, a shaft outer circle K6, a rotating shaft external thread F6, a rotating section 64 and a fastening section 65, the shaft outer circle K6 of the rotating shaft penetrates through the shaft hole 38 on the gear support and is matched with the shaft hole, the rotating shaft external thread F6 penetrates through the rotating shaft hole 12 of the fixed blade and is in threaded fit with the fixed blade, the rotating section 64 penetrates through the movable blade, the driven side-swing bevel gear, the plane thrust bearing 8 and the anti-jumping tooth part, the rotating connection is achieved, and the rotating section is locked with the fastening section 64 through a nut and a locking screw.

As shown in fig. 13 and 14, in this embodiment, taking the application of the symmetrical force-bearing single-side gear tooth skipping prevention mechanism to electric scissors as an example, the symmetrical force-bearing single-side gear tooth skipping prevention mechanism includes a gear bracket 3, a fixed cutter assembly 1 serving as a fixed cutter, a movable cutter assembly 2 serving as a movable cutter, a driven side swing gear serving as a driven side swing bevel gear, a driving gear 4 serving as a driving bevel gear, and a rotating shaft 6 serving as a cutter shaft; the driving bevel gear is meshed with the driven side swing bevel gear, the driven side swing bevel gear is connected with the movable blade through a blade pin, and the driven side swing bevel gear drives the movable blade to open, close and swing to form a shearing mode with the fixed blade by taking the blade shaft as a rotating center. A limiting piece is arranged at the swinging position of the driven side-swinging bevel gear, and the limiting piece is used for limiting by a magnet; the gear bracket is fastened in the middle by the internal threads of the cutter shaft and the fixed blade, and meanwhile, the movable blade, the driven side-swinging bevel gear, the plane thrust bearing and the anti-jumping tooth part penetrate through the cutter shaft and are fastened by a fastening nut and a locking screw.

In this embodiment, the driven side-swing bevel gear is installed between the gear support and the anti-jumping tooth component, the anti-jumping tooth component 7 for connecting the gear support and the cutter shaft is arranged on the outer side surface of the driven side-swing bevel gear, the anti-jumping tooth component is used for preventing the gear support from being subjected to bending deformation due to single-side stress, and a sufficiently small gap is kept between the inner side surface of the anti-jumping tooth component and the outer side surface of the driven side-swing bevel gear by about 0.2mm, so that a face type anti-jumping tooth structure for the driven side-swing bevel gear is formed, the driven side-swing bevel gear can be prevented from being meshed with the driving bevel gear after being subjected to stress when exceeding external force, and the problem of tooth jumping of the driven side-swing bevel gear is thoroughly solved.

In this embodiment, the gear support connecting end 71 of the tooth jumping prevention component 7 is fastened to the gear support 3 through bolts and nuts arranged in the fixing holes 75, the number of the bolts is set according to the magnitude of the shearing force, for example, objects such as branches with smaller diameters can be sheared, and the number of the nuts and the bolts can also be reduced; the rotating shaft connecting end 72 is connected with the cutter shaft through a shaft hole 73 and is fastened by a nut and a locking screw; the driven side-sway bevel gear is in plane connection with the anti-jumping gear component or is connected by arranging a plane thrust bearing 8, and the connection is realized by the plane thrust bearing 8 in the embodiment. In another embodiment, a plane thrust bearing is not used, and the driven side-sway bevel gear is directly in plane contact with the anti-jumping tooth component.

For ease of operation, in another embodiment, a trigger 343 and spring 344 are provided, which may be provided on the gear rack, i.e., on spring mount 341 and trigger base 342. Can also be arranged on the shell; the spring mounting seat 341 is provided with a concave hole or convex column structure (see fig. 14 and 15), between the spring and the trigger; 341 may be flat to allow the spring to automatically position.

The driven side swinging gear, the fixed component and the movable component can be arranged on the left side or the right side of the scissors for installation and use.

In this embodiment, an electric scissors includes a motor 100, a speed reducer 200, and the gear anti-jumping mechanism described in the above embodiments. The motor 100 is connected with a speed reducer 200, the speed reducer 200 is connected with the gear support 3 and the driving gear and transmits output torque to the driving gear, the driving gear transmits the torque to the driven side-swinging gear, and the driven side-swinging gear drives the fixed component to realize opening and closing. The opening and closing of the scissors moving knife is formed by driving a driving bevel gear to rotate forward and backward by a speed reducer and a motor.

Example 4:

in another embodiment, as shown in fig. 16 and 17, the rotating shaft 6 is of a tooth jumping prevention component side penetrating structure, and the rotating shaft 6 comprises an operating end 63, a rotating section 64, a hexagonal connecting section 66 and a fastening section 65. The rotating shaft 6 penetrates in from the direction of the anti-jumping tooth component 7, penetrates out through the anti-jumping tooth component, the plane thrust bearing, the driven side-swinging bevel gear, the moving blade, the fixed blade and the gear bracket, and is locked in an anti-loosening manner by the nut and the anti-loosening tooth blade 9. The shaft hole 38 that corresponds the setting of hexagonal linkage segment 66 on the gear bracket is the hexagonal shaft hole, and hexagonal linkage segment 66 and hexagonal shaft hole cooperation are provided with stationary knife installation boss 10 in the outside in hexagonal shaft hole, and stationary knife installation boss 10 cooperates with the pivot hole 12 of stationary knife piece.

Example 5:

in the embodiment shown in fig. 18 and 19, the rotating shaft 6 is a structure penetrating from the anti-jumping tooth component side, and the specific scheme thereof is basically the same as that of embodiment 2, except that: the last hexagonal linkage segment of pivot sets up to flat square hole section 67, and the last shaft hole 38 that corresponds flat square hole section 67 setting of gear support is flat square shaft hole, and flat square hole section 67 and flat square shaft hole cooperation are provided with stationary knife installation boss 10 in the outside in flat square shaft hole, and stationary knife installation boss 10 cooperates with the pivot hole 12 of stationary knife piece.

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, namely the fixed blade, are in threaded fit, the internal thread of the fixed blade is in threaded fit with the external thread of the rotating shaft, and the end part of the rotating shaft is fastened by the anti-loosening tooth piece and the screw.

Example 7:

in the embodiment shown in fig. 21, an electric cutting knife is mainly used for cutting a PVC plastic water pipe installed in a building, and the specific technical scheme is substantially the same as that of the electric scissors in embodiment 1, except that: the fixed component 1 is a pipe fixing cutting piece, and a pipe diameter matching groove 13 and a cutting knife groove 14 matched with the movable blade are arranged on the fixed component.

The anti-jumping gear mechanism according to the above embodiment is provided with the anti-jumping gear structure on the gear pair assembly, and when the anti-jumping gear structure causes the driven side-swinging gear to be engaged with the driving gear and to receive a shearing force, the force receiving direction of the shearing force acts on the anti-jumping gear structure, thereby greatly reducing the outward-biased normal force of the driven side-swinging gear, so that the driven side-swinging gear is not easy to slip and jump teeth, and the shearing force of the driven side-swinging gear always faces the direction of engagement with the driving gear, i.e., the shearing force is effectively reduced at the force opposite to the engagement of the driven side-swinging gear and the driving gear, i.e., the force which is disengaged is effectively reduced, thereby reducing the risk of gear slip, and thoroughly solving the problem of tooth jump of the driven side-swinging gear. Or the gear pair assembly is provided with an anti-jumping tooth structure, and the anti-jumping tooth part is arranged on the outer side of the driven side swinging gear, double anti-jumping teeth are realized through the anti-jumping tooth structure and the anti-jumping tooth part, the anti-jumping tooth structure enables the stress direction of the driven side swinging gear to mainly act on the movable assembly, the outward biased normal force of the driven side swinging gear is greatly reduced, so that the driven side swinging gear is not easy to slip and jump teeth, the anti-jumping tooth part is arranged on the outer side of the driven side swinging gear, so that the driven side swinging gear is positioned between the gear support and the anti-jumping tooth part and is arranged in a sandwich structure, the gear support and the anti-jumping tooth part form a bilateral symmetrical stress structure, the problem that the single side of the gear support is stressed in the process of shearing or clamping is avoided, the problem that the single side of the gear support is stressed and bent and deformed is avoided, and the stability of shearing or clamping is improved; and be provided with the clearance between passive side pendulum gear lateral surface and the anti-bouncing teeth spare medial surface, anti-bouncing teeth spare medial surface keeps the clearance that is enough little with passive side pendulum gear lateral surface, neither can influence opening and shutting that passive side pendulum gear drove the subassembly, can also thoroughly solve passive side pendulum gear problem of jumping the tooth, anti-bouncing teeth spare can stop passive side pendulum gear when shearing the atress, makes it mesh with the driving gear all the time, the tooth of jumping that can not appear skidding, the work of guaranteeing normal opening and shutting.

The electric scissors clamp type tool directly solves the maintenance troubles caused by the incapability of working due to the jumping of scissors and clamp type opening and closing tools of relevant workers such as fruit growers, garden pruning, building (PVC plastic) water pipe shearing, clamp type operation and the like. The use range of the tool is changed by replacing the fixed component and/or the movable component, for example, the electric scissors can be assembled by the fixed blade and the movable blade, the electric scissors can be changed into the electric cutting knife applied to building installation of PVC plastic water pipes by changing the fixed blade, and the electric scissors can also be other various opening and closing tools for various industries needing opening and closing actions. For example, the clamp can be replaced by a clamp or an animal ear marking clamp, a branch grafting clamp and other tools which can be opened and closed.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The present invention is not limited to the above-described examples, and variations, modifications, additions and substitutions which may be made by those skilled in the art within the spirit of the invention are considered to be within the scope of the invention.

Claims

1. A gear pair comprises a driving gear (4) and a driven sidesway gear (5) which are meshed with each other, and is characterized in that: the anti-jumping gear mechanism is characterized in that the driving gear (4) and the driven side-swinging gear (5) are provided with anti-jumping gear structures, each anti-jumping gear structure is a gear surface (57) with a gear surface angle (beta) of 75-90 degrees, each gear surface on the driven side-swinging gear is a shearing stress working surface when the driven side-swinging gear is in swing engagement, and an included angle (alpha) between each shearing stress working surface and a horizontal plane is 0-15 degrees.

2. A gear pair according to claim 1, 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; the driven side-sway gear (5) is a driven side-sway bevel gear, and the driven side-sway gear (5) comprises a spiral bevel gear and a straight bevel gear.

3. A gear anti-skip mechanism with the gear pair of claim 1, characterized in that: the tooth surface of the anti-jumping structure formed on the driven side-swinging gear is a shearing stress working surface when the movable component moves towards the closing direction.

4. The gear anti-skip mechanism of claim 3, wherein: and a tooth jumping prevention part (7) is arranged on the outer side of the driven side-swinging gear (5), and the tooth jumping prevention part (7) and the gear bracket (3) form a symmetrical stress structure.

5. The gear anti-skip mechanism of claim 4, wherein: the anti-jumping gear component (7) comprises a gear support connecting end (71) and a rotating shaft connecting end (72) which are integrally arranged, a shaft hole (73) is formed in the rotating shaft connecting end (72), and a plurality of fixing holes (75) are formed in the gear support connecting end (71); the rotating shaft connecting end of the anti-skipping gear component (7) is in contact with the driven side-sway gear through a plane or through a plane thrust bearing (8); a gap is formed between the inner side face of the gear support connecting end (71) of the anti-skipping gear component (7) and the outer side face of the driven side-sway gear (5).

6. The gear anti-skip mechanism of 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; the driving gear (4) is installed on the gear support (3) and is in force transmission connection with the power mechanism, and the moving assembly (2) is connected with the driven side swing gear (5) and is in rotating connection with the gear support (3) through a rotating shaft (6).

7. The gear anti-skip mechanism of claim 3, wherein: the driven side-sway gear (5) is a driven side-sway bevel gear, and the driven side-sway gear (5) comprises a spiral bevel gear and a straight bevel gear; the driven side swing gear (5) is provided with a gear end (51) and a swing end (52) in a swing rod type structure, the gear end (51) is meshed with the driving gear (4), the gear end (51) is provided with a limiting hole (53), and a limiting piece (54) is arranged in the limiting hole (53); the swing end (52) is provided with a rotating shaft connecting hole (55) and a movable assembly connecting hole (56).

8. The gear tooth skip prevention mechanism according to any of claims 3 to 7, characterized in that: the fixed component (1) is provided with a gear bracket fixing hole (11) and a rotating shaft hole (12); the movable component (2) is provided with a rotating shaft hole (21) and a fixed pin hole (22).

9. The gear tooth skip prevention mechanism according to any one of claims 3 to 7, characterized in that: the gear support (3) comprises a connecting body (31) and an installation body (32) which are integrally arranged, an installation cavity (33) is arranged inside the connecting body (31), the installation body (32) is integrally provided with an axial plate surface (34) and a radial plate surface (35) in an L-shaped structure, a driving gear installation hole (36) communicated with the installation cavity (33) is formed in the joint of the axial plate surface (34) and the radial plate surface (35), and a fixed assembly installation groove (37) and a shaft hole (38) perpendicular to the axial plate surface are arranged at the end part of the axial plate surface (34); the end face of the radial plate face (35) is provided with a tooth jump preventing part mounting face (39); a spring mounting seat (341) and a spanner seat (342) are arranged on the side surface of the axial plate surface (34).

10. An electric cutting nipper type tool, which is characterized in that: comprising a motor (100), a reducer (200) and a gear anti-skip mechanism according to any one of claims 3 to 7; the motor (100) connect reduction gear (200), reduction gear (200) connect gear bracket (3) and driving gear (4) and transmit output torque for driving gear (4), driving gear (4) transmit torque for driven side pendulum gear (5), driven side pendulum gear (5) drive and decide the subassembly and realize opening and shutting.