CN217455482U

CN217455482U - Motion conversion mechanism in graver

Info

Publication number: CN217455482U
Application number: CN202221372024.6U
Authority: CN
Inventors: 罗小军
Original assignee: Ningbo Newport Tools Co ltd
Current assignee: Ningbo Newport Tools Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-09-20
Anticipated expiration: 2032-06-02

Abstract

The utility model relates to a motion conversion mechanism in graver, including rotary drive axle and straight reciprocating motion axle, be connected with the motion conversion subassembly between rotary drive axle and the reciprocating motion axle, the motion conversion subassembly includes driving body and round pin, the driving body is installed on one end of straight reciprocating motion axle, the round pin is installed on rotary drive axle, the axial of round pin and the axial of rotary drive axle are vertical form and distribute, and the both ends of round pin stretch out in the radial end of rotary drive axle respectively; one end face of the driving body is provided with a concave-convex face facing the round pin, the round pin is driven to do circular motion by rotating the driving shaft, and the radial face of the round pin is abutted against the concave-convex face and drives the linear reciprocating shaft to do reciprocating linear motion back and forth along the shell of the graver; the utility model discloses can reduce the area of contact in the motion conversion mechanism motion process and come the friction reduction and improve conversion efficiency, vibration when simultaneously can reduce the operation increases life.

Description

Motion conversion mechanism in graver

Technical Field

The utility model belongs to the technical field of the carving tool, especially, relate to a motion conversion mechanism in carving tool.

Background

At present, with the development of science and technology, various automatic engraving machines are new and more popular, but in the aspects of artistry and details, mechanical engraving cannot replace manual engraving all the time, and an electric engraving knife can not only keep the uniqueness of manual engraving, but also accelerate the efficiency by utilizing the science and technology and save manpower. The existing motion conversion mechanisms of the tool bit of the electric graver adopt the rotation motion of a motor to be converted into the reciprocating motion of the tool bit so as to realize the motion of the tool bit of the electric graver; the motion conversion between them is through the face-to-face contact between the cam that connects on the motor shaft and the cam that connects on the arbor of tool bit to realize the straight reciprocating motion of rotary motion converting position round trip, and it has the area of contact great and causes conversion efficiency not high, and vibration is also great in the operation in addition, and life is not high defect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a motion conversion mechanism in carving tool who improves conversion efficiency and reduce vibration.

The utility model aims at completing the technical scheme that a motion conversion mechanism in the graver comprises a rotary driving shaft and a linear reciprocating motion shaft, a motion conversion assembly is connected between the rotary driving shaft and the reciprocating motion shaft, the motion conversion assembly comprises a driving body and a round pin, the driving body is installed on one end of the linear reciprocating motion shaft, the round pin is installed on the rotary driving shaft, the axial direction of the round pin and the axial direction of the rotary driving shaft are vertically distributed, and two ends of the round pin respectively extend out of the radial end of the rotary driving shaft; one end face of the driving body is designed to be a concave-convex face, the concave-convex face faces the round pin, the rotary driving shaft drives the round pin to do circular motion, and the radial face of the round pin abuts against the concave-convex face and drives the linear reciprocating motion shaft to do reciprocating linear motion back and forth along the shell of the graver.

The utility model has the advantages that: compared with the prior art, the adoption installs the round pin on the rotation driving shaft and the straight reciprocating motion is epaxial to be installed has the cooperation between the driving body of concave-convex face and realizes the contact motion of line and face to radial face through the round pin and the concave-convex face conflict motion of driving body realize rotary motion and convert into straight reciprocating motion, can reduce the area of contact and reduce the friction in the motion process of motion conversion mechanism and improve conversion efficiency, vibration when simultaneously can reduce the operation, increase life.

Preferably, a stepped hole penetrating along the axial direction of the driving body is formed in an inner core of the driving body, one end of the inner wall of the stepped hole is fixedly connected with a connecting body arranged at one end of the linear reciprocating shaft, and the other end of the inner wall of the stepped hole is slidably connected with one shaft end of the rotary driving shaft; thus, the assembly is more convenient, and the rotating driving shaft and the reciprocating shaft are not easy to slip off during operation.

Preferably, an internal thread is arranged at one end of the inner wall of the stepped hole, an external thread is arranged on the connecting body matched with the internal thread, and the driving body is fixedly connected with the linear reciprocating shaft in a threaded connection manner; the assembly and disassembly are more convenient.

Preferably, an installation hole is formed in one shaft end of the rotary driving shaft, the installation hole penetrates through the rotary driving shaft in the radial direction, and the round pin is inserted into the installation hole; the round pin is convenient to install and detach.

Preferably, the concave-convex surface is provided with two symmetrical convex surfaces and two symmetrical concave surfaces, and the convex surfaces and the concave surfaces are formed by cambered surface transition; the vibration during operation between the rotary drive shaft and the reciprocating shaft can be further reduced.

Preferably, a limiting sleeve is arranged in the engraving knife shell, and the inner wall of the limiting sleeve is a circular annular wall and is abutted against two axial end faces of the round pin; when the rotary driving shaft rotates at high speed, the limiting sleeve can prevent the round pin from slipping off the rotary driving shaft to cause failure of motion conversion between the round pin and the concave-convex surface.

Preferably, the outer wall of the limiting sleeve is provided with two limiting planes which are symmetrically distributed, the inner wall of the shell of the graver is provided with a limiting groove, and the limiting groove is matched with the limiting planes; therefore, the limiting sleeve can be limited on the inner wall of the shell of the graver stably, and the processing and the installation are convenient.

Preferably, the other end of the linear reciprocating shaft is provided with the engraving cutter head, so that the linear reciprocating motion of the engraving cutter head is realized; the other shaft end of the rotary driving shaft is connected with a driving shaft of the motor, so that the rotary motion of the rotary driving shaft is realized.

Drawings

Fig. 1 is a schematic perspective view of a motion conversion mechanism according to the present invention.

Fig. 2 is a schematic sectional view of a motion conversion mechanism in the graver according to the present invention.

Fig. 3 is a schematic perspective view of a driving body according to the present invention.

Fig. 4 is a schematic view of the structure of the stop collar of the present invention.

The reference numbers in the drawings are respectively: 1. a rotary drive shaft; 2. a linear reciprocating shaft; 3. a motion conversion assembly; 4. a graver housing; 5. a position limiting sleeve; 6. engraving a cutter head; 7. a motor; 11. mounting holes; 21. a linker; 31. a drive body; 32. a round pin; 41. a limiting groove; 51. a limiting plane; 71. a drive shaft; 311. a concave-convex surface; 312. a stepped hole; 311-1, convex; 311-2, concave; 311-3, arc surface.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings: as shown in fig. 1 to 4, the present invention includes a rotary driving shaft 1 and a linear reciprocating shaft 2, a motion conversion assembly 3 is connected between the rotary driving shaft 1 and the reciprocating shaft 2, the motion conversion assembly 3 includes a driving body 31 and a round pin 32, the driving body 31 is installed on one end of the linear reciprocating shaft 2, the round pin 32 is installed on the rotary driving shaft 1, the axial direction of the round pin 32 is vertically distributed with the axial direction of the rotary driving shaft 1, so that when the rotary driving shaft 1 rotates, the round pin 32 is driven to do circular motion along the axial core of the rotary driving shaft 1, and two ends of the round pin 32 respectively extend out of the radial end of the rotary driving shaft 1; one end surface of the driving body 31 is provided with a concave-convex surface 311, the concave-convex surface 311 faces the round pin 32, the rotary driving shaft 1 drives the round pin 32 to do circular motion, and the radial surface of the round pin 32 is abutted against the concave-convex surface 311 and drives the linear reciprocating shaft 2 to do reciprocating linear motion back and forth along the graver shell 4; the other end of the linear reciprocating motion shaft 2 is provided with a carving tool bit 6.

A stepped hole 312 which penetrates through the inner core of the driving body 31 along the axial direction of the driving body 31 is arranged, one end of the inner wall of the stepped hole 312 is fixedly connected with the connecting body 21 arranged at one end of the linear reciprocating motion shaft 2, the other end of the inner wall of the stepped hole 312 is connected with one shaft end of the rotary driving shaft 1 in a sliding manner, and the other shaft end of the rotary driving shaft 1 is connected with the driving shaft 71 of the motor 7; the diameter of the stepped hole 312 fixedly connected to the connecting body 21 is smaller than the diameter of the stepped hole 312 slidably fitted to the rotary drive shaft 1.

An internal thread is arranged at one end of the inner wall of the stepped hole 312, an external thread is arranged on the connecting body 21 matched with the internal thread, and the driving body 31 and the linear reciprocating shaft 2 are fixedly connected in a threaded connection mode; one shaft end of the rotary driving shaft 1 is provided with an installation hole 11, the installation hole 11 penetrates through the rotary driving shaft 1 along the radial direction, and the round pin 32 penetrates through the installation hole 11. The hole center line of the mounting hole 11 is distributed perpendicularly to the shaft center line of the rotary drive shaft 1.

The concave-convex surface 311 is provided with two symmetrical convex surfaces 311-1 and two symmetrical concave surfaces 311-2, and the convex surface 311-1 and the concave surface 311-2 are formed by transition through an arc surface 311-3. When the radial surfaces of the round pin 32 do circular motion, if the radial surfaces at two ends of the round pin 32 contact the convex surface 311-1, the linear reciprocating shaft 2 drives the engraving bit 6 to move outwards along the engraving knife housing 4, and then gradually transits to contact the concave surface 311-2 through the arc surface 311-3, so that the linear reciprocating shaft 2 drives the engraving bit 6 to move inwards gradually along the engraving knife housing 4.

The shell 4 of the graver is internally provided with a limit sleeve 5, the inner wall of the limit sleeve 5 is a circular annular wall and is abutted against the two axial end surfaces of the round pin 32, and when the round pin 32 makes circular motion through the rotary driving shaft 1, the two ends of the round pin 32 always make circular motion on the inner wall of the limit sleeve 5; the outer wall of stop collar 5 is equipped with two spacing planes 51 that are symmetric distribution, and the carving tool casing 4 inner wall is equipped with spacing groove 41, and spacing groove 41 and spacing plane 51 looks adaptation.

The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.

Claims

1. A motion conversion mechanism in an engraving knife comprises a rotary driving shaft (1) and a linear reciprocating motion shaft (2), wherein a motion conversion assembly (3) is connected between the rotary driving shaft (1) and the reciprocating motion shaft (2), and the motion conversion mechanism is characterized in that: the motion conversion assembly (3) comprises a driving body (31) and a round pin (32), the driving body (31) is installed at one end of the linear reciprocating motion shaft (2), the round pin (32) is installed on the rotary driving shaft (1), the axial direction of the round pin (32) is perpendicular to the axial direction of the rotary driving shaft (1), and two ends of the round pin (32) respectively extend out of the radial end of the rotary driving shaft (1); the one end face of drive body (31) is established to concave-convex face (311), concave-convex face (311) towards round pin (32), rotary drive axle (1) drives round pin (32) and makes circular motion, just the radial face of round pin (32) is contradicted concave-convex face (311) and drive straight reciprocating motion axle (2) are reciprocating linear motion along carving tool casing (4).

2. The motion conversion mechanism in a graver according to claim 1, wherein: the inner core of the driving body (31) is provided with a stepped hole (312) which penetrates through the driving body (31) in the axial direction, one end of the inner wall of the stepped hole (312) is fixedly connected with a connecting body (21) arranged at one end of the linear reciprocating motion shaft (2), and the other end of the inner wall of the stepped hole (312) is connected with one shaft end of the rotary driving shaft (1) in a sliding mode.

3. The motion conversion mechanism in a graver according to claim 2, wherein: an internal thread is arranged at one end of the inner wall of the stepped hole (312), an external thread is arranged on the connecting body (21) matched with the internal thread, and the driving body (31) is fixedly connected with the linear reciprocating motion shaft (2) in a threaded connection mode.

4. The motion conversion mechanism in a graver according to claim 2, wherein: an axle end of rotatory drive shaft (1) is equipped with mounting hole (11), mounting hole (11) are followed rotatory drive shaft (1) radially runs through the setting, round pin (32) alternate on mounting hole (11).

5. The motion conversion mechanism in a graver according to any one of claims 1 to 4, wherein: the concave-convex surface (311) is provided with two symmetrical convex surfaces (311-1) and two symmetrical concave surfaces (311-2), and the convex surfaces (311-1) and the concave surfaces (311-2) are formed by transition of cambered surfaces (311-3).

6. The motion conversion mechanism in a graver according to claim 1, wherein: install stop collar (5) in carving tool casing (4), the inner wall of stop collar (5) be circular rampart and with the axial both ends face of round pin (32) is inconsistent.

7. The motion conversion mechanism in a graver according to claim 6, wherein: the outer wall of stop collar (5) is equipped with two spacing planes (51) that are symmetric distribution, carving tool casing (4) inner wall is equipped with spacing groove (41), just spacing groove (41) with spacing plane (51) looks adaptation.

8. The motion conversion mechanism in a graver according to claim 1, wherein: the other end of the linear reciprocating motion shaft (2) is provided with a carving tool bit (6).

9. The motion conversion mechanism in a graver according to claim 2, wherein: the other shaft end of the rotating driving shaft (1) is connected with a driving shaft (71) of a motor (7).