Bidirectional driving mechanism for electric scissors blades and electric scissors blades

The present disclosure relates to the technical field of electric scissors, and in particular relates to a bidirectional driving mechanism for electric scissors blades and electric scissors. The bidirectional driving mechanism for electric scissors blade includes a fixed seat, a driving gear, a rotating shaft member, an upper blade group and a lower blade. The driving gear and the rotating shaft member are arranged on fixed seat, the lower blade and the upper blade group rotate around the rotating shaft member, an outer rack is arranged at a rear part of the lower blade, a front part of the upper blade group is an upper blade, a rear part of the upper blade group is a meshing block, and an inner rack is arranged at a rear part of the meshing block; and the inner rack and the outer rack are respectively meshed with both sides of the driving gear.

TECHNICAL FIELD

The present disclosure relates to the technical field of electric scissors, and in particular relates to a bidirectional driving mechanism for electric scissors blades and an electric scissors.

BACKGROUND

Electric scissors are branch and trunk pruning tools used for orchards, gardens, vines, 0 and the like. According to a traditional bidirectional drive mechanism for electric scissors blades, a driving gear is used to drive two bevel gears, and is then meshed with a swing arms with two racks through the bevel gears to drive two blades of the scissors to shear. However, the electric scissors of this structure have a large number of parts structurally, which makes it difficult to assemble, and this complex structure used is difficult to disassemble and to replace a certain part. In case of being damaged, the electric scissors need to be replaced entirely. In order to solve this problem, the applicant proposed a Chinese patent with number: CN202020466816.4 (published as CN212487415), entitled as “a novel electric scissors blade dual driving mechanism,” which uses a gear connected to the motor to directly drive two blades with racks, such that the two blades of the scissors are directly driven to shear. The bevel gear is removed and the number of parts is reduced. However, 0 the design of this structure has the following problems:

First, for a thickness of the electric scissors, it is necessary to consider a diameter of the gear and thicknesses of the two blades. In order to ensure the meshing of the driving gear with the rack, a rear part of the blade must have a large thickness, but such a large thickness will hinder the blade when shearing some intricate vines and branches, causing inaccurate shearing.

Second, when the rear parts of the two blades swing to a maximum extent, the meshing degree between the driving gear and teeth will be affected to a certain extent, which will cause the blades to open outwards when cutting some thicker vines and branches, causing damage to the electric scissors and reducing service life thereof.

In view of this, it is necessary to further propose an improved solution to solve the problems above-mentioned.

SUMMARY

In view of this, the present disclosure is mainly directed to provide a bidirectional driving mechanism for electric scissors blades.

The present disclosure adopts the following technical solutions:

A bidirectional driving mechanism for electric scissors blade includes a fixed seat, a driving gear, a rotating shaft member, an upper blade group and a lower blade. The driving gear and the rotating shaft member are arranged on the fixed seat, the lower blade and the upper blade group rotate around the rotating shaft member, an outer rack is arranged at a rear part of the lower blade, a front part of the upper blade group is an upper blade, a rear part of the upper blade group is a meshing block, and an inner rack is arranged at a rear part of the meshing block; and the inner rack and the outer rack are respectively meshed with both sides of the driving gear.

Preferably, the rotating shaft member includes a stop screw and a nut, a rotating shaft hole D is provided in the fixed seat, and the stop screw passes through the rotating shaft hole D and is in threaded connection with the nut.

Preferably, the stop screw comprises a connecting rod and a limiting cap, one end of the connecting rod is engaged with the limiting cap, and the other end of the connecting rod is provided with threads.

Preferably, a rotating shaft hole A is provided in a front part of the meshing block, a rotating shaft hole B is provided in a rear part of the upper blade, a rotating shaft hole C is provided in a middle part of the lower blade, and the rotating shaft hole A, the rotating shaft hole B and the rotating shaft hole C all rotate around the rotating shaft member; a pin hole E is also provided in the front part of the meshing block, a pin hole F is provided in the rear part of the upper blade, and a pin is connected in both the pin hole E and the pin hole F.

Preferably, a first protrusion is arranged at the front part of the meshing block, and the pin hole E is located at the first protrusion; and a second protrusion is arranged at the rear part of the upper blade, and the pin hole F is located at the second protrusion.

Preferably, the first protrusion is arranged at a front upper side of the shaft hole A, and the second protrusion is arranged at a front upper side of the shaft hole B.

Preferably, the outer rack and the inner rack are of arc-shaped structures.

Preferably, a gear hole is provided in the fixed seat, a deep groove bearing is connected in the gear hole, and a pin shaft of the driving gear is in running fit with the deep groove bearing.

An electric scissors includes a driving assembly. An output end of the driving assembly is dynamically connected to the pin shaft of the driving gear to drive the driving gear to rotate.

The driving gear and the rotating shaft member are arranged on the fixed seat, and the rotating shaft member makes the upper blade group and the lower blade rotate around it. Moreover, the meshing block is arranged, the inner rack is arranged at the rear part of the meshing block, the inner rack faces the outer rack at the rear part of the lower blade, and both sides of the driving gear are meshed with the inner rack and the outer rack respectively. Through this structure, the inner rack and the driving gear are located behind the outer rack, and there is no need to provide a position for mounting the driving gear between the upper blade and the lower blade, such that the thickness is reduced.

When driving, the driving gear, the upper blade and the lower blade all rotate in a circumferential direction in the same plane, and the situation that the upper blade and the lower blade open outwards since the circumferential rotation of the gear and the circumferential rotation of the upper blade and the lower blade are perpendicular to each other is avoided, thereby improving the stability of the bidirectional driving mechanism of electric scissors blades, and making the bidirectional driving mechanism of electric scissors blades more durable.

DESCRIPTION OF THE EMBODIMENTS

The present disclosure will be described in detail below with reference to embodiments and drawings.

Referring toFIG.1toFIG.4, the present disclosure provides a bidirectional driving mechanism for electric scissors blades, including a fixed seat10, a driving gear50, a rotating shaft member40, an upper blade group30and a lower blade20. The driving gear50and the rotating shaft member40are arranged on the fixed seat10, the lower blade20and the upper blade group30rotate around the rotating shaft member40, an outer rack21is arranged at a rear part of the lower blade20, a front part of the upper blade group30is an upper blade32, a rear part of the upper blade group30is a meshing block33, and an inner rack31is arranged at a rear part of the meshing block33; and the inner rack31and the outer rack21are respectively meshed with both sides of the driving gear50.

The driving gear50and the rotating shaft member40are arranged on the fixed seat10, and the rotating shaft member40makes the upper blade group30and the lower blade20rotate around it. Moreover, the meshing block33is arranged, the inner rack31is arranged at the rear part of the meshing block33, the inner rack31faces the outer rack21at the rear part of the lower blade20, and both sides of the driving gear50are meshed with the inner rack and the outer rack21respectively. Through this structure, the inner rack31and the driving gear50are located behind the outer rack21, and there is no need to provide a position for mounting the driving gear between the upper blade32and the lower blade20, such that the thickness is reduced. In addition, when driving, the driving gear50, the upper blade32and the lower blade20all rotate in a circumferential direction in the same plane, and the situation that the upper blade32and the lower blade20open outwards since the circumferential rotation of the gear and the circumferential rotation of the upper blade32and the lower blade20are perpendicular to each other is avoided, thereby improving the stability of the bidirectional driving mechanism of electric scissors blades, and making the bidirectional driving mechanism of electric scissors blades more durable.

Further, as shown inFIG.2andFIG.4, the rotating shaft member40includes a stop screw41and a nut42, a rotating shaft hole D is provided in the fixed seat10, and the stop screw41passes through the rotating shaft hole D and is in threaded connection with the nut42.

Further, as shown inFIG.2andFIG.4, the stop screw41includes a connecting rod410and a limiting cap412, one end of the connecting rod410is engaged with the limiting cap412, and the other end of the connecting rod410is provided with threads. The stop screw41and the nut42are arranged, and the stop screw41includes the connecting rod410and the limiting cap412, such that the detachable property is realized.

Further, as shown inFIG.3toFIG.4, a rotating shaft hole A is provided in a front part of the meshing block33, a rotating shaft hole B is provided in a rear part of the upper blade32, a rotating shaft hole C is provided in a middle part of the lower blade20, and the rotating shaft hole A, the rotating shaft hole B and the rotating shaft hole C all rotate around the rotating shaft member40; a pin hole E is also provided in the front part of the meshing block33, a pin hole F is provided in the rear part of the upper blade32, and a pin34is connected in both the pin hole E and the pin hole F. With this arrangement, the meshing block33and the upper blade32are of detachable structures, and thus can be detached for separate replacement when the inner rack31on a meshing portion is used for a long time or the upper blade32is used for a long time and the accuracy decreases, which improves the flexibility of replacement. Moreover, the pin34is arranged to cooperate with the rotating shaft member40to realize the mutual positioning and cooperation of the meshing block33and the upper blade32, such that the meshing block33can drive the upper blade32to rotate to realize shearing.

Further, as shown inFIG.3toFIG.4, a first protrusion331is arranged at the front part of the meshing block33, and the pin hole E is located at the first protrusion331; a second protrusion321is arranged at the rear part of the upper blade32, and the pin hole F is located at the second protrusion321; and suitable positions are provided for the pin holes.

Further, as shown inFIG.3toFIG.4, the first protrusion331is arranged at a front upper side of the shaft hole A, and the second protrusion321is arranged at a front upper side of the shaft hole B. With this position structure, when the meshing block33drives the pin34to operate, a moving path of the pin34is just toward a connecting line between the rotating shaft hole of the upper blade32and the pin hole. During this process, the pin34swings by being vertically against the upper blade32. With this arrangement, the wear between the pin34and the pin hole can be reduced to a minimum, and the stability of shearing can be improved, thereby further prolonging the service life of the bidirectional drive mechanism for electric scissors blades.

Further, as shown inFIG.1toFIG.4, the outer rack21and the inner rack31are of arc-shaped structures; and the centers of circles corresponding to arcs of the outer rack21and the inner rack31are made correspond to a center line of the rotating shaft member40, so as to realize close meshing with the driving gear50.

Further, as shown inFIG.2andFIG.4, a gear hole11is provided in the fixed seat10, a deep groove bearing12is connected in the gear hole11, and a pin shaft of the driving gear50is in running fit with the deep groove bearing12, so as to realize rotation of the driving gear50.

An electric scissors includes a driving assembly. An output end of the driving assembly is dynamically connected to the pin shaft of the driving gear50to drive the driving gear50to rotate, and the rotation of the driving gear50drives the outer rack21and the inner rack31to rotate synchronously, such that the upper blade32and the lower blade20swing up and down to complete shearing.

In the above technical means, in order to more illustrate the operating principle of the bidirectional drive mechanism for electric scissors blades clearly, further descriptions will be given from the following two embodiments:

Referring toFIG.1toFIG.2, a bidirectional driving mechanism for electric scissors blades includes a fixed seat10, a driving gear50, a rotating shaft member40, an upper blade group30and a lower blade20. The driving gear50and the rotating shaft member40are arranged on the fixed seat10, the lower blade20and the upper blade group30rotate around the rotating shaft member40, an outer rack21is arranged at a rear part of the lower blade20, a front part of the upper blade group30is the upper blade32, a rear part of the upper blade group is a meshing block33, and an inner rack31is arranged at a rear part of the meshing block33; and the inner rack31and the outer rack21are respectively meshed with both sides of the driving gear50. The rotating shaft member40includes a stop screw41and a nut42, a rotating shall hole D is provided in the fixed seat10, and the stop screw41passes through the rotating shaft hole D and is in threaded connection with the nut42. The stop screw41includes a connecting rod410and a limiting cap412, one end of the connecting rod410is engaged with the limiting cap412, and the other end of the connecting rod410is provided with threads. In practical applications, the driving assembly drives the driving gear50to rotate, under the rotation of the driving gear050, the bidirectional driving mechanism for electric scissors blade drives the inner rack31and the outer rack21to swing, thereby driving the upper blade32and the lower blade20to shear.

As shownFIG.3toFIG.4, a bidirectional driving mechanism for electric scissors blades includes a fixed seat10, a driving gear50, a rotating shaft member40, an upper blade group30and a lower blade20. The driving gear50and the rotating shaft member40are arranged on the fixed seat10, the lower blade20and the upper blade group30rotate around the rotating shaft member40, an outer rack21is arranged at a rear part of the lower blade20, a front part of the upper blade group30is an upper blade32, a rear part of the upper blade group is a meshing block33, and an inner rack31is arranged at a rear part of the meshing block33. The inner rack31and the outer rack21are respectively meshed with both sides of the driving gear50. The rotating shaft member40includes a stop screw41and a nut42, a rotating shaft hole D is provided in the fixed seat10, and the stop screw41passes through the rotating shaft hole D and is in threaded connection with the nut42. The stop screw41includes a connecting rod410and a limiting cap412, one end of the connecting rod410is engaged with the limiting cap412, and the other end of the connecting rod412is provided with threads. A rotating shaft hole A is provided in a front part of the meshing block33, a rotating shaft hole B is provided in a rear part of the upper blade32, a rotating shaft hole C is provided in a middle part of the lower blade20, and the o rotating shaft hole A, the rotating shaft hole B and the rotating shaft hole C all rotate around the rotating shaft member40. A pin hole E is also provided in the front part of the meshing block33, a pin hole F is provided in the rear part of the upper blade32, and a pin34is connected in both the pin hole E and the pin hole F. In practical applications, the driving assembly drives the driving gear50to rotate, under the rotation of the driving gear50, the bidirectional driving mechanism for electric scissors blade drives the inner rack31and the outer rack21to swing, thereby driving the upper blade32and the lower blade20to shear. When a part is damaged, the nut42is loosened, the mechanism is entirely disassembled to replace the damaged part. If the meshing block33or the upper blade32is damaged, the pin34is knocked out with a nail or similar tool, and then the meshing block33or the upper blade32is replaced.

For those skilled in the art, it is obvious that the present disclosure is not limited to the details of the foregoing exemplary embodiments, and the present disclosure can be implemented in other specific forms without departing from the spirit or basic characteristics of the present disclosure. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of the present disclosure is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalents are encompassed in the present disclosure. Any numerals in the claims should not be regarded as the limiting to the claims involved.