CN216820805U - Electric scissors - Google Patents

Abstract

The utility model discloses an electric scissors, including motor, reduction gear, gear bracket, drive bevel gear, swing bevel gear, stationary blade and moving blade, the motor connect the reduction gear, reduction gear connection drive bevel gear, swing bevel gear's gear auxiliary end and drive bevel gear mesh mutually, the stationary blade fix on gear bracket, the moving blade fix the swing end at swing bevel gear, the moving blade form shear type structure with the stationary blade under swing bevel gear drives, moving blade and the coaxial rotation of swing bevel gear, the gear bracket of swing bevel gear lateral surface on be provided with a symmetrical atress and prevent jumping the tooth connecting rod. According to the electric scissors, the symmetrical stress anti-jumping tooth connecting rod and the outer side of the swing bevel gear keep a small enough gap so that the swing bevel gear can be blocked when exceeding external force, jumping teeth can not be generated, the design of a face type anti-jumping tooth structure of the swing bevel gear is realized, and the problem of jumping teeth of the swing bevel gear is thoroughly solved.

Description

Electric scissors

Technical Field

The utility model belongs to the technical field of electric scissors, especially, relate to an electric scissors.

Background

Gear drive formula electric scissors, need bear external force and then realize the shearing function in the use, therefore, external force is too big makes the gear skid under the atress effect very easily, cause the jump tooth, and lead to the worker can't normally tailor the scheduling problem, under the normal condition, when cuting less branch, through electric scissors, can cut off unnecessary branch fast, and is convenient laborsaving, but if cuting great branch, then because external force is too big, can cause the gear to take off the tooth problem etc. current electric scissors, driven side swing bevel gear slips easily when cuting the atress and jumps the tooth and makes the unable work of scissors promptly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving current gear drive formula electric scissors, easily skid, cause the tooth phenomenon of jumping, influence normal use scheduling problem, and provide one kind and make the even atress of pendulum tooth, can effectively prevent the electric scissors that the tooth phenomenon of jumping takes place.

The utility model discloses the technical scheme who realizes its invention purpose adoption is: the utility model provides an electric scissors, includes motor, reduction gear, gear rack, drive bevel gear, swing bevel gear, stationary blade and moving blade, the motor connect the reduction gear, reduction gear connection drive bevel gear, swing bevel gear's gear auxiliary end mesh with drive bevel gear mutually, the stationary blade fix on gear rack, the moving blade fix at swing bevel gear's swing end, the moving blade form shear type structure with the stationary blade under swing bevel gear drives, moving blade and the coaxial rotation of swing bevel gear, the gear rack of swing bevel gear lateral surface on be provided with a symmetrical atress and prevent jumping the tooth connecting rod.

The electric scissors are characterized in that a symmetrical stress anti-jumping tooth connecting rod is arranged on the outer side of a swing bevel gear, the swing bevel gear is positioned between a gear support and the symmetrical stress anti-jumping tooth connecting rod, a small enough gap is arranged between the outer side surface of the swing bevel gear and the inner side surface of the symmetrical stress anti-jumping tooth connecting rod, when the swing bevel gear is deformed by a larger external force, the small enough anti-jumping tooth gap enables the outer side surface of the swing bevel gear to be attached to the inner side surface of the symmetrical stress anti-jumping tooth connecting rod, the outward deformation and jumping phenomenon of the swing bevel gear is prevented through surface-surface matching, the external force is transmitted to the symmetrical stress anti-jumping tooth connecting rod, the uniform stress structure on the two sides of the gear support and the symmetrical stress anti-jumping tooth connecting rod is realized, the opening and closing of a movable blade driven by the swing bevel gear can not be influenced, the problem of tooth jumping of the swing bevel gear can be thoroughly solved, and the swing bevel gear is always meshed with a driving gear, the gear skipping that skids can not appear, guarantees normal work that opens and shuts.

Preferably, the symmetrical stress anti-jumping tooth connecting rod and the gear bracket form a U-shaped symmetrical stress frame structure, and a gap is formed between the inner side surface of the symmetrical stress anti-jumping tooth connecting rod and the outer side surface of the swinging bevel gear. The U-shaped symmetrical stress frame structure can realize the quick replacement of the fixed blade and the movable blade without disassembling the symmetrical stress anti-jumping tooth connecting rod, and the operation is convenient and quick. A small enough gap is kept between the inner side surface of the symmetrical stress anti-jumping tooth connecting rod and the outer side surface of the swing bevel gear, the gap is about 0.2mm, the swing bevel gear can be prevented from sliding outwards when being stressed too much, and the purpose of preventing jumping teeth is really achieved.

Preferably, the gear bracket, the fixed blade, the movable blade, the swing bevel gear and the symmetrically stressed anti-jumping tooth connecting rod are coaxially connected through a cutter shaft.

Preferably, the cutter shaft comprises a structure penetrating from the side of the gear bracket and a structure penetrating from the side of the symmetrically stressed anti-jumping gear connecting rod. Because the swing bevel gear can be arranged on the left side or the right side of the gear bracket, the symmetrically stressed anti-jumping tooth connecting rods are correspondingly arranged on the left side and the right side, and the cutter shafts correspondingly penetrate from the right side and the left side to realize connection. The cutter shaft structure is designed according to the coaxial arrangement structure of the gear bracket, the fixed blade, the movable blade, the swing bevel gear and the symmetrical stress anti-jumping tooth connecting rod.

Preferably, the gear bracket is provided with a mounting shaft hole which is a round hole, a hexagonal hole or a flat square hole; when the mounting shaft hole is a hexagonal hole or a flat square hole, a fixed cutter mounting boss is arranged on the gear bracket.

Preferably, one side of the swing bevel gear, which is meshed with the drive bevel gear, is provided with a limiting magnet. The limiting magnet is arranged for limiting the swinging position of the swinging bevel gear.

Preferably, the gear pair of the swing bevel gear comprises a spiral bevel gear and a straight bevel gear.

Preferably, the swing bevel gear is provided with a tooth surface angle of 75-90 degrees, the tooth surface is a shearing stress surface when the movable blade is towards the closing direction, and an included angle between a working surface of the shearing stress surface and a horizontal plane is 0-15 degrees. The tooth profile of driven side swing bevel gear sets up and is approximately right trapezoid structure, and its nearly right-angled flank of tooth sets up to shearing the stress surface when the moving blade of shearing is toward the direction of closing the mouth, and shearing stress working face angle connects and is 0 ~ 15 degrees with the horizontal plane contained angle, certainly, can widen this angular range under the little condition of shearing force.

Preferably, the swinging bevel gear is in contact with the symmetrical stress anti-bouncing tooth connecting rod through a plane collision or through a plane thrust bearing. A plane thrust bearing can be arranged between the swing bevel gear and the symmetrically stressed anti-bouncing tooth connecting rod and is contacted through the plane thrust bearing; or the plane thrust bearing is not used, and the plane contact of the symmetrical stress anti-jumping tooth connecting rod is directly realized through the swing bevel gear.

Preferably, the movable blade is fixedly connected with the swing bevel gear through a cutter pin.

Preferably, the side of the gear bracket is provided with a spring and a trigger. The trigger is provided to facilitate the operation of the electric shears, but of course, the trigger may be provided not on the gear holder but on the housing.

The utility model has the advantages that: according to the electric scissors, the symmetrical stress anti-bouncing tooth connecting rods for connecting the gear support and the cutter shaft are arranged on the outer side of the swing bevel gear, the symmetrical stress anti-bouncing tooth connecting rods and the gear support form a U-shaped symmetrical stress structure, a small enough gap is kept between the symmetrical stress anti-bouncing tooth connecting rods and the outer side of the swing bevel gear, so that the swing bevel gear can be blocked when the external force is exceeded, the driven side swing bevel gear is always meshed with the driving gear after being stressed, no bouncing tooth is generated, the design of a face type anti-bouncing tooth structure of the swing bevel gear is realized, and the problem of bouncing tooth of the swing bevel gear is thoroughly solved; and the problem of maintenance troubles caused by the fact that the scissors cannot work due to the jumping of the scissors by related workers such as fruit growers and garden pruning can be directly solved.

Drawings

FIG. 1 is a schematic structural view of the electric scissors of the present invention in an open state;

FIG. 2 is a schematic structural view of the electric scissors according to the present invention in a closed state;

FIG. 3 is a schematic view of an exploded structure of the novel electric scissors;

FIG. 4 is a schematic view of the present invention showing the engagement of the drive gear with the bevel gear;

FIG. 5 is a schematic view of a configuration of the tooth flanks of a wobble bevel gear according to the present invention;

FIG. 6 is another schematic structural view of the tooth flanks of a bevel gear according to the present invention;

fig. 7 is a schematic structural view of the gear bracket of the present invention;

fig. 8 is another schematic structural view of the gear bracket of the present invention;

fig. 9 is a schematic view of an exploded structure of electric scissors according to embodiment 2 of the present invention;

fig. 10 is a schematic view of an exploded structure of electric scissors according to embodiment 3 of the present invention;

fig. 11 is a schematic view of an exploded structure of electric scissors according to embodiment 4 of the present invention;

in the figure: 1. the device comprises a motor, 2, a speed reducer, 3, a gear bracket, 4, a driving bevel gear, 5, a swing bevel gear, 6, a fixed blade, 7, a movable blade, 8, a symmetrical stress anti-jumping tooth connecting rod, 9, a cutter shaft, K9, an axial excircle of the cutter shaft, F9, an external thread of the cutter shaft, 10, an installation shaft hole, 11, a fixed cutter installation boss, 12, a limiting magnet, 13, a tooth surface, 14, a plane thrust bearing, 15, a cutter pin, 16, a trigger, 17, a spring, 18, a spring support, 19, a locking tooth surface, beta, a tooth surface angle, alpha and an included angle.

Detailed Description

The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided to explain the invention, but not to limit the invention.

Example 1:

as shown in fig. 1, 2 and 3, an electric scissors comprises a motor 1, a speed reducer 2, a gear bracket 3, a drive bevel gear 4, a swing bevel gear 5, a fixed blade 6 and a movable blade 7, wherein the motor 1 is connected with the speed reducer 2, the speed reducer 2 is connected with the drive bevel gear 4, a gear pair end of the swing bevel gear 5 is meshed with the drive bevel gear 4, the fixed blade 6 is fixed on the gear bracket 3, the movable blade 7 is fixed at a swing end of the swing bevel gear 5, the movable blade 7 is driven by the swing bevel gear 5 to form a shear type structure with the fixed blade 6, the movable blade 7 and the swing bevel gear 5 rotate coaxially, and a symmetrical stress anti-skip tooth connecting rod 8 is arranged on the gear bracket 3 on the outer side surface of the swing bevel gear 5. As shown in fig. 4, the motor 1 is connected to the speed reducer 2, the speed reducer 2 is connected to the driving gear and transmits the output torque to the driving gear 4, the driving gear 4 transmits the torque to the swing bevel gear 5, and the swing bevel gear 5 drives the fixed blade 6 to open and close. 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.

The symmetrical stress anti-jumping tooth connecting rod 8 and the gear bracket 3 form a U-shaped symmetrical stress frame structure, and a gap is formed between the inner side surface of the symmetrical stress anti-jumping tooth connecting rod 8 and the outer side surface of the swing bevel gear 5. The swing bevel gear is installed between the gear support and the symmetrical stress anti-jumping connecting rod, the symmetrical stress anti-jumping connecting rod 8 for connecting the gear support and the cutter shaft is arranged on the outer side surface of the swing bevel gear, the symmetrical stress anti-jumping connecting rod is used for preventing the unilateral stress bending deformation of the gear support, and the small enough clearance between the inner side surface of the symmetrical stress anti-jumping connecting rod and the outer side surface of the swing bevel gear is kept about 0.2mm, so that the driven side swing bevel gear can be prevented from leaving the meshing of the driving bevel gear after being stressed when exceeding external force, and the problem of tooth jumping of the driven side swing bevel gear is thoroughly solved.

The gear bracket 3, the fixed blade 6, the movable blade 7, the swing bevel gear 5 and the symmetrical stress anti-jumping connecting rod 8 are coaxially connected through a cutter shaft 9.

The cutter shaft 9 comprises a structure penetrating through the side of the gear support and a structure penetrating through the side of the symmetrical stress anti-jumping gear connecting rod.

The gear bracket 3 is provided with a mounting shaft hole 10, and the mounting shaft hole 10 is a round hole, a hexagonal hole or a flat square hole; when the mounting shaft hole 10 is a hexagonal hole or a flat square hole, a fixed cutter mounting boss 11 is arranged on the gear bracket 3.

And a limiting magnet 12 is arranged on one side of the swing bevel gear 5 meshed with the drive bevel gear 4.

The gear pair of the swing bevel gear 5 comprises a spiral bevel gear and a straight bevel gear.

The swing bevel gear 5 is contacted with the symmetrical stress anti-jumping tooth connecting rod 8 through plane contact or through a plane thrust bearing 14. A plane thrust bearing can be arranged between the swing bevel gear and the symmetrically stressed anti-bouncing tooth connecting rod and is contacted through the plane thrust bearing; or the plane thrust bearing is not used, and the plane contact of the symmetrical stress anti-jumping tooth connecting rod is directly realized through the swing bevel gear. In this embodiment, contact is made through a flat thrust bearing. The movable blade 7 is fixedly connected with the swing bevel gear 5 through a cutter pin 15.

The side of the gear bracket 3 is provided with a trigger 16 and a spring 17. As shown in fig. 7 and 8, a spring support 18 is disposed on a side surface of the specific gear bracket 3, the spring support is a concave hole or a convex column, and the spring is disposed between the spring support and the trigger.

In this embodiment, the cutter shaft 9 adopts a structure penetrating from the side of the gear bracket, and the cutter shaft 9 penetrates from the direction of the gear bracket, penetrates out through the gear bracket 3, the fixed blade 6, the movable blade 7, the swing bevel gear 5, the plane thrust bearing 14 and the symmetrical stress anti-jumping tooth connecting rod 8, and is locked in a locking manner by using a nut and a screw. The outer shaft circle K9 of the cutter shaft penetrates through the mounting shaft hole 10 on the gear bracket and is matched with the gear bracket, and the outer cutter shaft thread F9 penetrates through the cutter shaft hole of the fixed cutter blade and is matched with the fixed cutter blade in a threaded manner. The gear bracket is fastened in the middle by the internal threads of the cutter shaft and the fixed blade.

The symmetrical stress anti-jumping tooth connecting rod 8 is fastened on the gear bracket by three groups of screws, so that the gear bracket is concentric with a cutter shaft hole of the symmetrical stress anti-jumping tooth connecting rod and is fastened by a nut and a locking screw. For example, when cutting objects such as branches with smaller diameters, the screws and nuts in the middle group are not needed. The swing bevel gear is connected with the symmetrical stress anti-jumping gear connecting rod through a plane thrust bearing 14.

In order to facilitate the operation, a trigger and a spring are also arranged on the gear bracket. The swing bevel gear, the fixed blade and the movable blade can be arranged on the left side or the right side of the scissors for use.

Example 2:

in the embodiment shown in fig. 5 and 6, the technical solution is basically the same as that of embodiment 1, except that: the driving bevel gear 4 and the swing bevel gear 5 are provided with tooth surfaces 13 with tooth surface angles beta of 75-90 degrees, the tooth surfaces 13 are shearing stress surfaces when the movable assembly moves towards the closed direction, and an included angle alpha between each shearing stress surface and a horizontal plane is 0-15 degrees. In the embodiment, the tooth profile of the swing bevel gear is approximately in a right trapezoid shape, the tooth surface of the approximate right angle is a shearing stress surface when a moving blade of the scissors moves towards the closing direction, the angle of the shearing stress working surface is approximately 10 degrees close to the horizontal plane, the tooth profile of the driving wheel is meshed with the swing bevel gear in a matching mode, the meshing risk that the swing bevel gear is separated from the driving bevel gear after being stressed when the swing bevel gear exceeds a shearing external force F is dispersed, and the swing bevel gear is prevented from slipping due to stress jumping.

Example 3:

in the embodiment shown in fig. 9, the technical solution is substantially the same as that of embodiment 2, except that: a kind of electronic scissors, the said arbor 9 is from the symmetrical force to defend jumping the structure of the side penetration of the tooth tie rod, there are hexagonal axles on the arbor 9, the mounting shaft hole on the correspondent gear bracket is a hexagonal shaft hole, the arbor is penetrated from the symmetrical force to defend jumping the direction of the tooth tie rod, the symmetrical force defends jumping the tooth tie rod, plane thrust bearing, swing bevel gear, moving blade, stationary blade and gear bracket to wear out, reuse nut and locking the locking tooth piece 19 locking. A fixed cutter mounting boss 11 is arranged on the gear support outside the hexagonal shaft hole, and the fixed cutter mounting boss 11 is matched with the cutter shaft hole 1 of the fixed cutter blade.

Example 4:

in the embodiment shown in fig. 10, the technical solution is substantially the same as that of embodiment 2, except that: the cutter shaft is of a symmetrical stress anti-jumping tooth connecting rod side penetrating structure, the specific scheme of the cutter shaft is basically the same as that of the embodiment 2, and the difference lies in that: the flat square shaft is arranged on the cutter shaft, the mounting shaft hole in the gear support is correspondingly arranged to be a flat square shaft hole, the flat square shaft is matched with the flat square shaft hole, a fixed cutter mounting boss 11 is arranged outside the flat square shaft hole, and the fixed cutter mounting boss 11 is matched with the cutter shaft hole of the fixed cutter blade.

Example 5:

in the embodiment shown in fig. 11, the technical solution is substantially the same as that of embodiment 4, except that: the cutter shaft is in threaded fit with the fixed blade, the internal thread of the fixed blade is in threaded fit with the external thread of the cutter shaft, and the end part of the cutter shaft is fastened by the anti-loosening tooth piece and the screw.

According to the electric scissors in the embodiment, the symmetrical stress anti-jumping tooth connecting rods are arranged on the outer sides of the swing bevel gears, or the symmetrical stress anti-jumping tooth connecting rods are arranged on the outer sides of the swing bevel gears, the tooth surfaces of the driving bevel gears and the swing bevel gears are approximate to right angles, the gear supports and the symmetrical stress anti-jumping tooth connecting rods form a bilateral symmetrical stress structure, the tooth surfaces enable the driving bevel gears and the swing bevel gears to be meshed, the outward-biased normal force of the driven side swing gears is greatly reduced, the driven side swing gears are not prone to slipping and jumping, the problem that the gear supports are stressed on one side in the shearing process is solved, the problem that the gear supports are stressed on one side and bent and deformed is solved, and the shearing stability is improved; the symmetrical stress prevents jumping the tooth connecting rod medial surface and the swing bevel gear lateral surface and keeps enough little clearance, neither can influence the swing bevel gear and drive opening and shutting of moving blade, can also thoroughly solve the swing bevel gear problem of jumping the tooth, and the symmetrical stress prevents jumping the tooth connecting rod and can block swing bevel gear when cuting the atress, 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 electric scissors directly solves the maintenance troubles caused by the fact that the electric scissors cannot work due to the tooth jumping of the electric scissors for relevant workers such as fruit growers and garden pruning. The electric scissors can be changed into other various opening and closing tools for various industries needing opening and closing actions by replacing the fixed blade and the movable blade. 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 indicated with respect to the orientation description, such as up, down, 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 or substitutions made by those skilled in the art within the scope of the present invention should be construed as the protection scope of the present invention.

Claims (10)

1. The utility model provides an electric scissors, includes motor (1), reduction gear (2), gear rack (3), drive bevel gear (4), swing bevel gear (5), stationary blade (6) and moving blade (7), motor (1) connect reduction gear (2), reduction gear (2) connect drive bevel gear (4), the gear auxiliary end and the drive bevel gear (4) of swing bevel gear (5) mesh mutually, stationary blade (6) fix on gear rack (3), moving blade (7) fix the swing end at swing bevel gear (5), moving blade (7) form shear type structure, its characterized in that with stationary blade (6) under swing bevel gear (5) drive: the movable blade (7) and the swing bevel gear (5) rotate coaxially, and a symmetrical stress anti-jumping tooth connecting rod (8) is arranged on the gear support (3) on the outer side surface of the swing bevel gear (5).

2. Electric shears according to claim 1, wherein: the symmetrical stress anti-bouncing tooth connecting rod (8) and the gear bracket (3) form a U-shaped symmetrical stress frame structure, and a gap is formed between the inner side surface of the symmetrical stress anti-bouncing tooth connecting rod (8) and the outer side surface of the swinging bevel gear (5).

3. Electric shears according to claim 1, wherein: the gear support (3), the fixed blade (6), the movable blade (7), the swing bevel gear (5) and the symmetrical stress anti-jumping gear connecting rod (8) are coaxially connected through a cutter shaft (9).

4. Electric shears according to claim 3, wherein: the cutter shaft (9) comprises a structure penetrating through the side of the gear support and a structure penetrating through the side of the symmetrical stress anti-jumping gear connecting rod.

5. Electric shears according to claim 4, wherein: the gear bracket (3) is provided with a mounting shaft hole (10), and the mounting shaft hole (10) is a round hole, a hexagonal hole or a flat square hole; when the mounting shaft hole (10) is a hexagonal hole or a flat square hole, a fixed cutter mounting boss (11) is arranged on the gear support (3).

6. Electric shears according to claim 1, wherein: and a limiting magnet (12) is arranged on one side of the meshing part of the swing bevel gear (5) and the driving bevel gear (4).

7. Electric shears according to any one of claims 1 to 6, wherein: the gear pair of the driving bevel gear (4) and the swinging bevel gear (5) comprises a spiral bevel gear and a straight bevel gear.

8. Electric shears according to any one of claims 1 to 6, wherein: the gear pair of the driving bevel gear (4) and the swinging bevel gear (5) is provided with a tooth surface (13) with a tooth surface angle beta of 75-90 degrees, the tooth surface is a shearing stress surface when the movable assembly moves towards the closed direction, and an included angle alpha between the shearing stress surface and the horizontal plane is 0-15 degrees.

9. Electric shears according to any one of claims 1 to 6, wherein: the swing bevel gear (5) is in contact with the symmetrical stress anti-bouncing tooth connecting rod (8) through plane contact or a plane thrust bearing (14); the movable blade (7) is fixedly connected with the swing bevel gear (5) through a cutter pin (15).

10. Electric shears according to any one of claims 1 to 6, wherein: and a trigger (16) and a spring (17) are arranged on the side surface of the gear bracket (3).

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