CN113977010A

CN113977010A - Gear grinding tool

Info

Publication number: CN113977010A
Application number: CN202111208441.7A
Authority: CN
Inventors: 郑志仪; 任国华
Original assignee: Wuxi Hengyitong Machinery Co ltd
Current assignee: Wuxi Hengyitong Machinery Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-01-28

Abstract

The invention discloses a gear grinding tool which comprises a shell with an installation cavity, wherein a positioning mandrel is installed at the upper end of the shell, an expansion sleeve is sleeved on the outer side of the positioning mandrel, a gear workpiece is sleeved outside the expansion sleeve, a piston is fixedly arranged in the installation cavity, a cavity is arranged in the piston, a piston rod is movably arranged in the cavity, a pull rod is movably arranged in the positioning mandrel in a penetrating mode, the lower end of the pull rod is detachably connected with the piston rod, a pressure head is arranged on the pull rod, the lower end face of the pressure head is in contact with the top end face of the expansion sleeve, the cavity is divided into an upper cavity and a lower cavity by the piston rod, an oil inlet communicated with the upper cavity and a pressure relief opening communicated with the lower cavity are formed in the shell, oil enters the upper cavity and pushes the piston rod to move downwards to enable the pressure head of the pull rod to press the expansion sleeve downwards, and therefore the expansion sleeve deforms outwards to expand the gear workpiece. Through the mode, the gear grinding tool disclosed by the invention has the advantages that the internal structure is optimized, the expansion sleeve can be conveniently and quickly replaced after being worn, the structure is simple, the use is convenient, and the safety and the reliability are realized.

Description

Gear grinding tool

Technical Field

The invention relates to the field of gear grinding machines, in particular to a gear grinding tool assembled on a gear grinding machine.

Background

The process of grinding the teeth of a gear using a gear grinding machine is called gear grinding. The gear grinding machine generally expands the gear through the expansion sleeve of the hydraulic tool clamp, but due to the structural limitation of the existing tool clamp, the expansion sleeve is worn and torn due to long-time practical use, the whole set of tool clamp needs to be replaced after the expansion sleeve is worn and torn, the internal structure of the existing hydraulic tool clamp is complex, and the production cost is very high.

Disclosure of Invention

The invention mainly solves the technical problem of providing a gear grinding tool which can optimize the internal structure, can be conveniently and quickly replaced after an expansion sleeve is worn, and is simple in structure, convenient to use, safe and reliable.

In order to solve the technical problems, the invention adopts a technical scheme that: provides a gear grinding tool, which comprises a shell with a mounting cavity, wherein the upper end of the shell is provided with a positioning mandrel, an expansion sleeve is sleeved outside the positioning mandrel, a gear workpiece is sleeved outside the expansion sleeve, a piston is fixedly arranged in the installation cavity, a cavity is arranged in the piston, a piston rod is movably arranged in the cavity, a pull rod is movably arranged in the positioning core shaft in a penetrating way, the lower end of the pull rod is detachably connected with the piston rod, the pull rod is provided with a pressure head, the lower end surface of the pressure head is contacted with the top end surface of the expansion sleeve, the piston rod divides the cavity into an upper cavity and a lower cavity, the shell is provided with an oil inlet communicated with the upper cavity and a pressure relief opening communicated with the lower cavity, the oil inlet enters the upper cavity and pushes the piston rod to move downwards to enable the pressure head of the pull rod to press the expansion sleeve downwards, so that the expansion sleeve deforms outwards to expand the gear workpiece.

In a preferred embodiment of the present invention, the upper end of the piston rod has a stepped end surface, the stepped end surface is spaced from the upper chamber, and the oil in the upper chamber pushes down the piston rod through the stepped end surface.

In a preferred embodiment of the invention, a spring for resetting the piston rod is connected between the lower end of the piston rod and the housing.

In a preferred embodiment of the present invention, the lower end of the piston rod is provided with a guide hole, the housing is internally provided with a guide pin, and the upper end part of the guide pin extends into the guide hole to move the piston rod up and down along the positioning pin.

In a preferred embodiment of the invention, the upper end of the piston rod is connected with a connecting rod in a threaded manner, and the upper end of the connecting rod is connected with the pull rod in a threaded manner.

In a preferred embodiment of the invention, the ram is a T-ram.

In a preferred embodiment of the present invention, a pull rod limiting screw is further threadedly connected to the housing, and a front end of the pull rod limiting screw presses an outer wall of the pull rod to limit rotation of the pull rod.

In a preferred embodiment of the invention, the right end and the lower end of the expansion sleeve are attached to the positioning mandrel.

In a preferred embodiment of the present invention, the housing includes a base and a head base, the base and the head base are connected, the positioning core shaft is mounted at the upper end of the head base through a locking screw, the oil inlet and the pressure relief opening are opened on the base, and the piston is fixedly connected to the base through a screw.

In a preferred embodiment of the invention, the lower end of the base is provided with a base adapter, the base is arranged on the gear grinding machine, and the base adapter is matched and connected with a clamping mechanism of the gear grinding machine.

The invention has the beneficial effects that: the gear grinding tool can optimize the internal structure, can be conveniently and quickly replaced after the expansion sleeve is worn, and is simple in structure, convenient to use, safe and reliable.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic perspective view of a preferred embodiment of a gear grinding tool according to the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a top view of FIG. 1;

FIG. 5 is a cross-sectional view of FIG. 2;

FIG. 6 is a sectional view taken along line B-B of FIG. 3;

FIG. 7 is a D-D rightward view of FIG. 4;

FIG. 8 is a schematic view of a portion of the structure of FIG. 5;

the parts in the drawings are numbered as follows: 1. the device comprises a shell, 101, an oil inlet, 102, a pressure relief opening, 103, a base, 104, a head seat, 105, a positioning plane, 106, a direction pin, 107, a locking bolt, 2, a positioning mandrel, 3, an expansion sleeve, 4, a gear workpiece, 5, a piston, 501, an upper cavity, 502, a lower cavity, 6, a piston rod, 601, a step-shaped end face, 602, a guide hole, 603, a guide pin, 7, a pull rod, 701, a pressure head, 8, a connecting rod, 9, a pull rod limiting screw, 10, a base adapter, 1001, a connecting head, 1002, a positioning center part, 1003, a tool locking part, 1004, a cylindrical connecting section, 1005, a ball seat, 1006, a locking surface, 11 and a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, a gear grinding tool includes a housing 1 having an installation cavity, a positioning mandrel 2 is installed at an upper end of the housing 1, an expansion sleeve 3 is sleeved outside the positioning mandrel 2, a gear workpiece 4 is sleeved outside the expansion sleeve 3, a piston 5 is fixedly arranged in the installation cavity, a cavity is arranged in the piston 5, a piston rod 6 is movably arranged in the cavity, a pull rod 7 movably penetrates through the positioning mandrel 2, a lower end of the pull rod 7 is detachably connected with the piston rod 6, a pressure head 701 is arranged on the pull rod 7, a lower end face of the pressure head 701 is in contact with a top end face of the expansion sleeve 3, the cavity is divided into an upper cavity 501 and a lower cavity 502 by the piston rod 6, an oil inlet 101 communicated with the upper cavity 501 and an upper cavity opening 102 communicated with the lower cavity 502 are formed in the housing 1, oil in the oil inlet 101 enters the 501 and pushes the piston rod 6 to move down to enable the pressure head 701 of the pull rod 7 to press the expansion sleeve 3, so that the expansion sleeve 3 deforms outwards to expand the gear workpiece 4.

The piston rod 6 has a stepped end surface 601 at its upper end, the stepped end surface 601 is spaced from the upper chamber 51, and the oil in the upper chamber 501 pushes down the piston rod 6 via the stepped end surface 601. The piston rod 6 and the piston 5 are sealed by two Y-shaped oil seals, so that the upper cavity 501 and the lower cavity 502 are isolated, and oil in the upper cavity 501 is prevented from entering the shell 1. Oil enters the upper cavity 501 from the oil inlet 101, the oil acts on the stepped end surface 601 to move the piston rod 6 downwards, and the piston rod 6 moves downwards to discharge air in the lower cavity 502 through the pressure relief opening 102. And a plug is also arranged in the upper cavity to seal the upper cavity and the shell.

In addition, a spring 11 for restoring the piston rod 6 is connected between the lower end of the piston rod 6 and the housing 1. After releasing the hydraulic oil in the oil inlet 101, the spring 11 pushes the piston rod 6 to move upwards, so that the pressure head of the pull rod 7 releases the expansion sleeve 3.

In addition, the lower end of the piston rod 6 is provided with a guide hole 602, a guide pin 603 is installed in the housing 1, and the upper end portion of the guide pin 603 extends into the guide hole 602 to move the piston rod 6 up and down along the guide pin 603.

In addition, the upper end of the piston rod 6 is connected with a connecting rod 8 in a threaded manner, and the upper end of the connecting rod 8 is connected with the pull rod 7 in a threaded manner. When the expansion sleeve 3 is worn to the degree that needs to be replaced, the pull rod 7 is rotated, the pull rod 7 is unscrewed from the connecting rod 8, then the pull rod 7 is pulled out upwards, at the moment, the expansion sleeve 3 is taken out from the positioning mandrel 2, a new expansion sleeve 3 is replaced, then the pull rod 7 is inserted into the positioning mandrel 2 again and is screwed with the connecting rod 8, and the replacement of the expansion sleeve 3 is completed.

The indenter 701 is a T-shaped indenter.

In addition, the shell 1 is further connected with a pull rod limiting screw 9 in a threaded mode, the front end of the pull rod limiting screw 9 presses the outer wall of the pull rod 7 to limit rotation of the pull rod 7, and when the pull rod needs to be taken down, the pull rod limiting screw 9 needs to be rotated to enable the pull rod limiting screw 9 to be separated from the pull rod 7.

In addition, the right end and the lower end of the expansion sleeve 3 are attached to the positioning mandrel 2.

In addition, the housing 1 comprises a base 103 and a head base 104, the base 103 is connected with the head base 104, the positioning core shaft 2 is installed at the upper end of the head base 104 through a locking screw, the oil inlet 101 and the pressure relief port 102 are formed in the base 103, and the piston 5 is fixedly connected to the base 103 through a screw.

In addition, a base adapter 10 is installed at the lower end of the base 103, the base 103 is installed on the gear grinding machine, the bottom surface of the base 103 is provided with a positioning plane 105 matched with the gear grinding machine, the base adapter 10 is installed at the middle part of the base 103, and be perpendicular downward setting with base 103, base adapter 10 includes connecting head 1001, connect head 1001 cooperation and pack into base 103, the lower extreme of connecting head 1001 has location central part 1002, the up end laminating of location central part 1002 is on location plane 105, the external diameter of location central part 1002 diminishes from the top down gradually, the lower extreme of location central part 1002 is connected with frock locking portion 1003, the upper end of frock locking portion 1003 is the cylindrical linkage segment 1004 who is connected with location central part 1002, the lower extreme of cylindrical linkage segment 1004 is connected with ball seat 1005 of installing in the gear grinding machine, the upper end of ball seat 1005 has the locking surface 1006 of being connected with cylindrical linkage segment 1004.

Further, a direction pin 106 is attached to the base 103, the direction pin 106 is located outside the base adapter 10, and the direction pin 106 is inserted into the gear grinding machine.

In addition, the bottom surface of the ball seat 100 is a plane surface, and the left and right sides are arc surfaces.

In addition, a locking bolt 107 is inserted into the center of the base adapter 10, and the upper end of the locking bolt 107 is in threaded connection with the middle of the base 103 to fixedly connect the base adapter 10 to the base 103. The base adapter 10 is in a mating connection with a clamping mechanism of a gear grinding machine. The gear grinding machine is a purchased BZ130 worm grinding wheel gear grinding machine of Burri, Germany, and a clamping mechanism arranged on the gear grinding machine can be matched with a base, a positioning center part, a tool locking part and a locking surface, so that the gear grinding tool can be positioned and clamped.

The gear grinding tool disclosed by the invention has the following specific working principle: after the installation is finished, the base adapter 10 is installed on a clamping mechanism of the running-in machine, and the gear grinding tool is tightly fixed in position through the clamping mechanism. The gear workpiece 4 is mounted on the outer side of the expansion sleeve 3, hydraulic oil is introduced into an oil inlet 101, the hydraulic oil enters an upper cavity 501 of the piston 5 through the oil inlet 101, the oil and the stepped end face 601 act, the piston rod 6 is pushed by the oil to move downwards, the piston rod 6 drives the connecting rod 8 and the pull rod 7 to move downwards, the upper end face of the expansion sleeve 3 is pressed downwards by the pressure head 701 to enable the expansion sleeve 3 to expand the gear workpiece 4 outwards, then the gear grinding machine processes the gear workpiece, after the processing is completed, oil supply of the oil inlet 101 is stopped, the oil is discharged out of the upper cavity 101, the piston rod 6 moves upwards under the action of the spring 11, the pressure head 701 loosens the expansion sleeve 3, the expansion sleeve 3 loosens the gear workpiece 4, the gear workpiece 4 which is processed can be taken down, a new gear workpiece 4 is replaced, and the steps are repeated to process the gear workpiece 4 again.

Different from the prior art, the gear grinding tool disclosed by the invention can optimize the internal structure, can be conveniently and quickly replaced after the expansion sleeve is worn, and is simple in structure, convenient to use, safe and reliable.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A gear grinding tool comprises a shell with a mounting cavity, and is characterized in that a positioning mandrel is mounted at the upper end of the shell, an expansion sleeve is sleeved outside the positioning mandrel, a gear workpiece is sleeved outside the expansion sleeve, a piston is fixedly arranged in the installation cavity, a cavity is arranged in the piston, a piston rod is movably arranged in the cavity, a pull rod is movably arranged in the positioning core shaft in a penetrating way, the lower end of the pull rod is detachably connected with the piston rod, the pull rod is provided with a pressure head, the lower end surface of the pressure head is contacted with the top end surface of the expansion sleeve, the piston rod divides the cavity into an upper cavity and a lower cavity, the shell is provided with an oil inlet communicated with the upper cavity and a pressure relief opening communicated with the lower cavity, the oil inlet enters the upper cavity and pushes the piston rod to move downwards to enable the pressure head of the pull rod to press the expansion sleeve downwards, so that the expansion sleeve deforms outwards to expand the gear workpiece.

2. The gear grinding tool according to claim 1, wherein a stepped end face is arranged at the upper end of the piston rod, the stepped end face and the upper cavity are arranged in a clearance mode, and oil in the upper cavity presses down the piston rod through the stepped end face.

3. The gear grinding tool according to claim 2, wherein a spring for resetting the piston rod is connected between the lower end of the piston rod and the shell.

4. The gear grinding tool according to claim 3, wherein a guide hole is formed in the lower end of the piston rod, a guide pin is installed in the shell, and the upper end portion of the guide pin extends into the guide hole to enable the piston rod to move up and down along the guide pin.

5. The gear grinding tool for the gear grinding machine according to claim 4, wherein a connecting rod is connected to the upper end of the piston rod in a threaded manner, and the upper end of the connecting rod is connected with the pull rod in a threaded manner.

6. The gear grinding tool according to claim 5, wherein the pressure head is a T-shaped pressure head.

7. The gear grinding tool according to claim 6, wherein a pull rod limiting screw is further connected to the shell in a threaded manner, and the front end of the pull rod limiting screw presses the outer wall of the pull rod to limit rotation of the pull rod.

8. The gear grinding tool according to any one of claims 1 to 7, wherein the right end and the lower end of the expansion sleeve are attached to the positioning mandrel.

9. The gear grinding tool according to claim 8, wherein the housing comprises a base and a head base, the base is connected with the head base, the positioning mandrel is mounted at the upper end of the head base through a locking screw, the oil inlet and the pressure relief port are formed in the base, and the piston is fixedly connected to the base through a screw.

10. The gear grinding tool according to claim 9, wherein a base adapter is mounted at the lower end of the base, the base is mounted on a gear grinding machine, and the base adapter is connected with a clamping mechanism of the gear grinding machine in a matched mode.