CN210413679U

CN210413679U - High-speed cutting tool

Info

Publication number: CN210413679U
Application number: CN201920800859.9U
Authority: CN
Inventors: 陈永清
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-04-28
Anticipated expiration: 2029-05-30

Abstract

The utility model discloses a high-speed cutting tool, which comprises a shell, wherein a driving shaft driven by a motor is rotatably arranged in the shell, a first cam and a second cam are arranged on the driving shaft, a first reciprocating rod and a second reciprocating rod are movably arranged in the shell, and when the driving shaft rotates, the phase difference between the reciprocating motion of a counterweight mechanism and the reciprocating motion of a cutter mechanism is 180 degrees; the counterweight mechanism comprises a first connecting rod, the first connecting rod is in running fit with one end of a second reciprocating rod through a bearing, columnar counterweight pieces are fixedly arranged at the upper end and the lower end of the first connecting rod, and the counterweight pieces are in running fit with sliding bearings and extend axially along one side of a driving shaft. When the motor drives the driving shaft to move at a high speed, because the phase difference between the first reciprocating rod and the second reciprocating rod is 180 degrees, the vibration generated by the first reciprocating rod and the second reciprocating rod can be counteracted and the noise is greatly reduced; and because the counterweight extends axially along one side of the driving shaft, the height of the whole shell is greatly reduced.

Description

High-speed cutting tool

Technical Field

The utility model relates to a cutting means technical field, more specific relates to a reciprocating type cutting means.

Background

The conventional reciprocating cutting tool is often quite complex in structure, and is not beneficial to reducing the size of the whole tool. Specifically, refer to the reciprocating type cutting tool structure disclosed in the utility model patent with patent application number "cn201320856736. x", the name is "reciprocating saw", it includes the motor, is used for holding the casing of motor, the frame that links to each other with the casing and the aircraft nose casing outside the frame the top of frame is fixed with the uide bushing in the aircraft nose casing in the uide bushing in have the reciprocating lever that is used for connecting the blade, still include one set of balancing piece of establishing on the uide bushing the frame opposite side is provided with the drive balancing piece drive pendulum rod of drive balancing piece reciprocating motion through the round pin axle symmetry, through the reciprocating lever and the balancing piece that the orbit is unanimous and the opposite direction of motion, has eliminated the unbalanced force of reciprocating lever in reciprocating motion.

However, the structure that the balance block and the reciprocating rod are driven by the balance block driving swing rod and the reciprocating rod driving swing rod to drive the balance block and the reciprocating rod to move in the guide sleeve is very complex, and the balance block driving swing rod and the reciprocating rod driving swing rod are matched with the balance block and the reciprocating rod to vibrate violently and generate noise easily when the motor rotates at a high speed.

Disclosure of Invention

An object of the utility model is to overcome the defect that exists among the prior art, provide a high-speed cutting tool.

The utility model discloses a realize through following technical scheme: a high-speed cutting tool comprises a shell, wherein a driving shaft is rotatably arranged in the shell, the driving shaft is driven by a motor to rotate along a central axis, a first cam and a second cam are arranged on the driving shaft, a first reciprocating rod and a second reciprocating rod are movably arranged in the shell, the first cam is in transmission connection with a cutter mechanism through the first reciprocating rod, and the second cam is in transmission connection with a counterweight mechanism through the second reciprocating rod; the first cam and the second cam have the same shape and are arranged in opposite directions, so that when the driving shaft rotates, the phase of the reciprocating motion of the counterweight mechanism and the phase of the reciprocating motion of the cutter mechanism are different by 180 degrees; the counter weight mechanism includes the head rod, the head rod pass through the bearing with the one end normal running fit of second reciprocating lever the upper and lower both ends of head rod are all fixed and are provided with and are cylindrical counterweight, counterweight with slide bearing movable fit that the casing internal fixation set up just counterweight extends along drive shaft one side direction axial.

In the above technical solution, the cutter mechanism includes a cutter shaft, a cutter is fixed to a head of the cutter shaft through a cutter holder, and the cutter shaft is connected to the first reciprocating rod.

In the technical scheme, the tail end of the cutter shaft is provided with a screw hole, the cutter shaft further comprises a joint shaft, a circle of baffle ring is arranged on the inner wall of the front end of the joint shaft, thrust ball bearings are arranged on two sides of the baffle ring, a cutter shaft connecting pin penetrates through the joint shaft and then is screwed into the screw hole of the cutter shaft, and the cutter shaft connecting pin tightly presses the two thrust ball bearings; coaxial through holes are formed in two side walls of the tail end of the joint shaft, the other end of the first reciprocating rod is in running fit with the second connecting rod through a bearing, and the upper end and the lower end of the second connecting rod are limited in the through holes formed in the two side walls of the tail end of the joint shaft respectively.

In the above technical solution, the housing further includes a tool holder guide sleeve, and the tool holder is guided by the tool holder guide sleeve.

The utility model discloses following beneficial effect has: when the motor drives the driving shaft to move at a high speed, because the phase difference between the first reciprocating rod and the second reciprocating rod is 180 degrees, the vibration generated by the first reciprocating rod and the second reciprocating rod can be counteracted and the noise is greatly reduced; and because the counterweight extends axially along one side of the driving shaft, the height of the whole shell is greatly reduced.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of a part of the structure of the present invention.

Fig. 3 is a schematic sectional view of the present invention.

Fig. 4 is a perspective view of the drive shaft.

Fig. 5 is a partially enlarged view of a portion a in fig. 3.

Detailed Description

The invention will be described in further detail with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 5, a high-speed cutting tool includes a housing 100, a driving shaft 1 rotatably disposed in the housing 100, the driving shaft 1 being driven to rotate along a central axis by a motor 101, and a first cam 10 and a second cam 11 disposed on the driving shaft 1. A first reciprocating rod 2 and a second reciprocating rod 3 are movably arranged in the shell 100, the first cam 10 is in transmission connection with the cutter mechanism 4 through the first reciprocating rod 2, and the second cam 11 is in transmission connection with the counterweight mechanism 5 through the second reciprocating rod 3.

The first cam 10 and the second cam 11 have the same shape and are arranged in opposite directions, so that when the driving shaft rotates, the phase difference between the reciprocating motion of the counterweight mechanism and the reciprocating motion of the cutter mechanism is 180 degrees, the unbalanced force of the first reciprocating rod and the second reciprocating rod in the motion is eliminated, the cutting tool operates stably, the vibration is greatly reduced, and the noise is greatly reduced.

The counterweight mechanism 5 comprises a first connecting rod 50, the first connecting rod 50 is in rotating fit with one end of the second reciprocating rod 3 through a bearing, columnar counterweight members 51 are fixedly arranged at the upper end and the lower end of the first connecting rod 50, and the counterweight members 51 are in movable fit with sliding bearings 52 fixedly arranged in the shell; the weight member 51 extends axially in a direction of one side of the drive shaft 1, thereby greatly reducing the height of the entire housing 100 (i.e., the axial length of the housing).

The cutter mechanism 4 comprises a cutter shaft 40, a cutter 42 is fixed at the head of the cutter shaft 40 through a cutter holder 41, a screw hole is formed at the tail end of the cutter shaft 40, the cutter mechanism further comprises a joint shaft 44, a circle of baffle ring 44a is arranged on the inner wall of the front end of the joint shaft 44, thrust ball bearings 45 are arranged on two sides of the baffle ring 44a, a cutter shaft connecting pin 43 penetrates through the joint shaft 44 and then is screwed into the screw hole of the cutter shaft 40, the cutter shaft connecting pin 43 tightly presses the two thrust ball bearings 45, and the joint shaft 44 is connected with the cutter shaft 40 in the above mode. Further, the housing 100 further includes a holder guide sleeve 100a, and the holder 41 is guided by the holder guide sleeve 100a to prevent the tool from being displaced when the tool is reciprocated to cut.

Coaxial through holes 46 are formed in two side walls of the tail end of the joint shaft 44, the other end of the first reciprocating rod 2 is in rotating fit with a second connecting rod 47 through a bearing, the upper end and the lower end of the second connecting rod 47 are limited in the through holes 46 formed in the two side walls of the tail end of the joint shaft 44 respectively, and the joint shaft 44 is connected with the second connecting rod 47 through the mode.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The foregoing embodiments and description of the invention have been provided in the present application for the purpose of illustrating the principles of the invention and is subject to various changes and modifications without departing from the spirit and scope of the invention. All such variations and modifications are intended to be within the scope of the claimed invention.

Claims

1. A high-speed cutting tool comprising a housing (100), a drive shaft (1) rotatably disposed within the housing (100), the drive shaft (1) being driven in rotation along a central axis by a motor (101), characterized in that: a first cam (10) and a second cam (11) are arranged on the driving shaft (1), a first reciprocating rod (2) and a second reciprocating rod (3) are movably arranged in the shell (100), the first cam (10) is in transmission connection with the cutter mechanism (4) through the first reciprocating rod (2), and the second cam (11) is in transmission connection with the counterweight mechanism (5) through the second reciprocating rod (3); the first cam (10) and the second cam (11) have the same shape and are arranged in opposite directions, so that when the driving shaft rotates, the phase of the reciprocating motion of the counterweight mechanism and the phase of the reciprocating motion of the cutter mechanism are different by 180 degrees; counter weight mechanism (5) include head rod (50), head rod (50) pass through the bearing with the one end normal running fit of second reciprocating lever (3) the upper and lower both ends of head rod (50) are all fixed and are cylindrical counterweight (51) be provided with, counterweight (51) with slide bearing (52) the clearance fit that the casing internal fixation set up just counterweight (51) are along drive shaft (1) one side direction axial extension.

2. A high speed cutting tool as claimed in claim 1, wherein: the cutter mechanism (4) comprises a cutter shaft (40), a cutter (42) is fixed at the head of the cutter shaft (40) through a cutter holder (41), and the cutter shaft (40) is connected with the first reciprocating rod (2).

3. A high speed cutting tool as claimed in claim 2, wherein: the cutter shaft connecting device comprises a cutter shaft (40) and a joint shaft (44), wherein a screw hole is formed in the tail end of the cutter shaft (40), a circle of baffle ring (44 a) is arranged on the inner wall of the front end of the joint shaft (44), thrust ball bearings (45) are arranged on two sides of the baffle ring (44 a), a cutter shaft connecting pin (43) penetrates through the joint shaft (44) and then is screwed into the screw hole of the cutter shaft (40), and the cutter shaft connecting pin (43) tightly presses the two thrust ball bearings (45); coaxial through holes (46) are formed in two side walls of the tail end of the joint shaft (44), the other end of the first reciprocating rod (2) is in running fit with a second connecting rod (47) through a bearing, and the upper end and the lower end of the second connecting rod (47) are limited in the through holes (46) formed in the two side walls of the tail end of the cutter shaft (40) respectively.

4. A high speed cutting tool as claimed in claim 1, wherein: the housing (100) further includes a holder guide sleeve (100 a) through which the holder (41) is guided.