CN217799037U

CN217799037U - Hydraulic expansion milling cutter head handle with safety lock

Info

Publication number: CN217799037U
Application number: CN202222204598.9U
Authority: CN
Inventors: 刘太恒
Original assignee: Jining Jiehe Machinery Co ltd
Current assignee: Jining Jiehe Machinery Co ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2022-11-15
Anticipated expiration: 2032-08-22

Abstract

A hydraulic expansion milling cutter head handle with a safety lock comprises a cutter handle body, wherein a concentric expansion body is fixedly connected to the rear part of the cutter handle body, a stop key is fixed on the rear end face of the expansion body through a bolt, an axially positioned worm wheel is concentrically arranged in an inner hole of the cutter handle body, a worm meshed with the worm wheel is arranged on one side of the cutter handle body, and the worm wheel form a safety locking mechanism; the center of the worm wheel is provided with a threaded hole, the center of the expansion body is provided with a through hole, the fastening bolt is arranged, a threaded rod part of the fastening bolt penetrates through the central through hole of the expansion body to be in threaded connection with the threaded hole in the center of the worm wheel, the rear part of the expansion body is provided with a hollow interlayer surrounding a circle to form an expansion chamber, the expansion body is provided with a plunger pump, the bottom of the plunger pump is communicated with the expansion chamber through an oil duct, and the expansion chamber, the oil duct and the plunger pump are filled with hydraulic oil. The cutter handle body of the utility model has firm connection to the milling cutter head without loosening; the vibration of the cutter in the machining process is greatly reduced; the shock absorption performance of the knife handle is greatly improved.

Description

Hydraulic expansion milling cutter head handle with safety lock

Technical Field

The utility model relates to a hydraulic pressure inflation milling cutter dish handle of a knife with safety lock for reliable and stable fixed connection milling cutter.

Background

The common cutter handle is used for tensioning the milling cutter head through a fastening bolt, and the milling cutter head and the cutter handle body do not move relatively by means of a stop key, so that the milling cutter head and the cutter handle body are connected into a whole and rotate together to play a cutting role. The structure is easy to generate vibration in the cutting process, so that the fastening bolt is gradually loosened to generate gaps, and the machined surface generates scale-shaped ripples which are serious or even fall off, thereby causing the scrapping of workpieces or potential safety hazards.

Disclosure of Invention

The utility model aims at providing a hydraulic pressure inflation milling cutter dish handle of a knife with safety lock solves current handle of a knife and easily produces vibrations when using, and fastening bolt is not hard up defect that drops even easily.

The purpose of the utility model is realized with the following mode: a hydraulic expansion milling cutter head handle with a safety lock comprises a cutter handle body, wherein a concentric expansion body is fixedly connected to the rear part of the cutter handle body, a stop key is fixed on the rear end face of the expansion body through a bolt, an axially positioned worm wheel is concentrically arranged in an inner hole of the cutter handle body, a worm meshed with the worm wheel is arranged on one side of the cutter handle body, and the worm wheel form a safety locking mechanism; the expansion body is provided with a hollow interlayer surrounding the circumference, the expansion body is provided with a plunger pump, the bottom of the plunger pump is communicated with the expansion chamber through an oil duct, and the expansion chamber, the oil duct and the plunger pump are filled with hydraulic oil.

Be provided with the plunger chamber on the inflation body, be equipped with the plunger in the plunger chamber, the outer mouth section of plunger chamber has the forcing screw of roof pressure plunger through threaded connection, and forcing screw, plunger and plunger chamber combine to constitute the plunger pump.

The knife handle body and the expansion body are connected together through the threads of the side wall.

The outer circumference of the worm wheel is in the shape of a large-diameter part with worm gear teeth in the middle and small-diameter cylinders on two sides, the large-diameter part with the worm gear teeth is positioned in a corresponding inner hole of the cutter handle body, the small-diameter cylinders on two sides are respectively positioned in diameter-adapting inner holes of the cutter handle body and the expansion body, the small-diameter cylinder on the front side of the worm wheel is sleeved with a gasket, and the gasket is supported on the end face of the diameter-changing hole of the cutter handle body, the large-diameter part of the worm wheel and the diameter-changing end face of the small-diameter cylinder.

The periphery of the front part of the tool shank body is a conical body which is used for being connected with a machine tool spindle.

When the milling cutter is used, the milling cutter disc is centered through the small-diameter cylinder at the rear end part of the expansion body, the stop key is circumferentially positioned and abutted against the rear end of the expansion body, the fastening bolt is inserted into the central hole of the milling cutter disc, the threaded rod part of the fastening bolt penetrates through the central through hole of the expansion body and is in threaded connection with the threaded hole at the center of the worm wheel, and the rear end head of the fastening bolt is tightly pressed on the peripheral end face of the central hole of the milling cutter disc; a pressurizing screw on the plunger pump is screwed, the pressurizing screw pushes the plunger to move to extrude hydraulic oil, the hydraulic oil enters the expansion chamber through the oil duct to extrude the expansion chamber to deform, and the internal fastening bolt and the external milling cutter handle are pressed tightly; and then the worm is rotated to drive the worm wheel to rotate so as to pull the fastening bolt tighter, the worm and the worm wheel are matched to form a safety locking mechanism, and the fastening bolt is tightened so as to firmly fix the milling cutter disc.

The utility model has the advantages that: (1) The worm gear and the worm form a safety locking mechanism by applying a self-locking principle of the worm gear and the worm, the worm gear cannot be reversed to release the fastening bolt after the worm drives the worm gear to rotate and tighten the fastening bolt, the fastening bolt pulls the milling cutter disc, and the connection of the cutter handle body to the milling cutter disc cannot be loosened; (2) Due to the deformation of the expansion chamber, no gap exists in the connection between the milling cutter disc and the cutter handle body, so that the vibration of the cutter in the machining process is greatly reduced; (3) Due to the flexible extrusion effect of hydraulic oil in the tool shank, the shock absorption performance of the tool shank is greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the safety locking mechanism.

Fig. 3 is a schematic structural view of the inflation body.

In the figure: 1-a knife handle body; 2-a gasket; 3-a worm; 4-a worm gear; 5-an expansion body; 6-a stop key; 7-a milling cutter disc; 8-an expansion chamber; 9-an oil duct; 10-a plunger pump; 11-fastening bolts.

Detailed Description

Referring to fig. 1, 2 and 3, a tool handle body 1 is provided, the periphery of the front part of the tool handle body 1 is a conical body, the rear part of the tool handle body 1 is fixedly connected with a concentric expansion body 5, the tool handle body 1 and the expansion body 5 are connected together through threads of side walls, a stop key 6 is fixed on the rear end surface of the expansion body 5 through a bolt, a worm wheel 4 which is axially positioned is concentrically arranged in an inner hole of the tool handle body 1, the outer circumference profile of the worm wheel 4 is a shape with a worm wheel tooth large-diameter part in the middle and small-diameter cylinders on two sides, the worm wheel tooth large-diameter part is arranged in a corresponding inner hole of the tool handle body 1, the small-diameter cylinders on two sides are respectively arranged in diameter adapting inner holes of the tool handle body 1 and the expansion body 5, a gasket 2 is sleeved on the small-diameter cylinder on the front side of the worm wheel 4, and the gasket 2 is supported on the reducing hole end surface of the tool handle body 1, the large-diameter part of the worm wheel and the reducing end surface of the cylinder; a worm 3 meshed with a worm wheel 4 is arranged on one side of a cutter handle body 1, the worm 3 and the worm wheel 4 form a safety locking mechanism, a threaded hole is formed in the center of the worm wheel 4, a through hole is formed in the center of an expansion body 5, a fastening bolt 11 is arranged, a threaded rod part of the fastening bolt 11 penetrates through the central through hole of the expansion body 5 to be in threaded connection with the threaded hole in the center of the worm wheel 4, a hollow interlayer surrounding a circle is arranged at the rear part of the expansion body 5 to form an expansion chamber, a plunger pump 10 is arranged on the expansion body 5, the bottom of the plunger pump 10 is communicated with the expansion chamber 8 through an oil duct 9, and the expansion chamber 8, the oil duct 9 and the plunger pump 10 are filled with hydraulic oil; and a plunger cavity is arranged on the expansion body 5, a plunger is arranged in the plunger cavity, an outer opening section of the plunger cavity is connected with a pressurizing screw for jacking the plunger through threads, and the pressurizing screw, the plunger and the plunger cavity are combined to form a plunger pump.

The milling cutter disc 7 is centered by a small-diameter cylinder at the rear end part of the expansion body 5, the stop key 6 is circumferentially positioned and leaned against the rear end of the expansion body 5, a threaded rod part of the fastening bolt 11 penetrates through a central through hole of the expansion body 5 to be in threaded connection with a threaded hole at the center of the worm gear 4, the rear end head of the fastening bolt 11 is tightly pressed on the peripheral end face of a central hole of the milling cutter disc 7 to tightly pull the milling cutter disc 7 against the expansion body 5, a pressurizing screw on the plunger pump is screwed, the pressurizing screw pushes the plunger to move to extrude hydraulic oil, the hydraulic oil enters the expansion chamber 8 through the oil passage 9 to extrude the expansion chamber 8 to deform, and the internal fastening bolt 11 and the external milling cutter handle 7 are tightly pressed; then the worm 3 is rotated, the worm 3 drives the worm wheel 4 to rotate so as to pull the fastening bolt 11 tighter, the worm wheel 4 is self-locked through the worm 3 and cannot be reversed to release the fastening bolt 11, and the fastening bolt 11 can reliably fix the milling cutter disc on the end part of the cutter handle body 1.

Claims

1. The utility model provides a hydraulic pressure inflation milling cutter dish handle of a knife with safety lock, includes the handle of a knife body, its characterized in that: the rear part of the knife handle body (1) is fixedly connected with a concentric expansion body (5), the rear end face of the expansion body (5) is fixed with a stop key (6) through a bolt, an axially positioned worm wheel (4) is concentrically arranged in an inner hole of the knife handle body (1), one side of the knife handle body (1) is provided with a worm (3) meshed with the worm wheel (4), and the worm (3) and the worm wheel (4) form a safety locking mechanism; the center of the worm wheel (4) is provided with a threaded hole, the center of the expansion body (5) is provided with a through hole, the fastening bolt (11) is arranged, the threaded rod part of the fastening bolt (11) penetrates through the central through hole of the expansion body (5) to be in threaded connection with the threaded hole in the center of the worm wheel (4), the rear part of the expansion body (5) is provided with a hollow interlayer surrounding a circle to form an expansion chamber (8), the expansion body (5) is provided with a plunger pump (10), the bottom of the plunger pump (10) is communicated with the expansion chamber (8) through an oil duct (9), and hydraulic oil is filled in the expansion chamber (8), the oil duct (9) and the plunger pump (10).

2. The hydraulic expansion milling cutter head handle with the safety lock according to claim 1, characterized in that: a plunger cavity is arranged on the expansion body (5), a plunger is arranged in the plunger cavity, a pressurizing screw for jacking the plunger is connected with the outer opening section of the plunger cavity through threads, and the pressurizing screw, the plunger and the plunger cavity are combined to form a plunger pump (10).

3. The hydraulically expandable milling cutter head handle with safety lock of claim 1, wherein: the knife handle body (1) and the expansion body (5) are connected together through threads on the side wall.

4. The hydraulic expansion milling cutter head handle with the safety lock according to claim 1, characterized in that: the outer circumference of the worm wheel (4) is in the shape of a large-diameter part with worm wheel teeth in the middle and small-diameter cylinders on two sides, the large-diameter part with the worm wheel teeth is positioned in a corresponding inner hole of the tool holder body (1), the small-diameter cylinders on two sides are respectively positioned in diameter adapting inner holes of the tool holder body (1) and the expansion body (5), the small-diameter cylinder on the front side of the worm wheel (4) is sleeved with a gasket (2), and the gasket (2) is supported on the end face of the reducing hole of the tool holder body (1) and the end faces of the large-diameter part and the small-diameter cylinder.

5. The hydraulic expansion milling cutter head handle with the safety lock according to claim 1, characterized in that: the periphery of the front part of the knife handle body (1) is a conical body.