CN111941126B

CN111941126B - Eccentric clamping mechanism for lathe tool

Info

Publication number: CN111941126B
Application number: CN202010680438.4A
Authority: CN
Inventors: 张超
Original assignee: SUZHOU XINHE MACHINERY CO Ltd
Current assignee: SUZHOU XINHE MACHINERY Co.,Ltd.
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2022-01-14
Anticipated expiration: 2040-07-15
Also published as: CN111941126A

Abstract

The invention relates to the technical field of lathe machining equipment and discloses an eccentric clamping mechanism for a lathe tool, which comprises an installation clamping seat, wherein a transmission sleeve is fixedly installed at the bottom end of the installation clamping seat, an eccentric sliding block is arranged in the middle of one side of an inner cavity of the transmission sleeve, a movable sleeve is movably sleeved in the middle of the inner cavity of the transmission sleeve, an eccentric sliding groove is formed in the outer surface of the movable sleeve, and the eccentric sliding groove is in contact with the eccentric sliding block on the transmission sleeve. This an eccentric formula fixture for lathe tool is to the setting that is the angular symmetry between the eccentric spout both sides for no matter transmission main shaft is clockwise rotation or anticlockwise rotation, all can exert certain extrusion force to the movable sleeve through the eccentric slider on the transmission sleeve, thereby avoided this eccentric formula drill bit clamping mechanism can only be along the problem of a direction centre gripping drill bit, and then improved this eccentric formula clamping mechanism's stability and adaptability effectively.

Description

Eccentric clamping mechanism for lathe tool

Technical Field

The invention relates to the technical field of lathe machining equipment, in particular to an eccentric clamping mechanism for a lathe tool.

Background

In the machining industry, lathe machining is used as a very wide hole machining device, and mainly comprises the steps that a drill bit and a transmission main shaft are fixedly connected through a clamping mechanism, and then the drill bit is driven to rotate along with the drill bit, so that the drilling operation of a workpiece is completed.

However, the clamping modes of the existing drill bit clamp are mainly divided into two modes, the drill bit is fixed by a thread extrusion mode when facing a drill bit with a smaller diameter, and the drill bit is fixed by a sleeve layer-by-layer overlapping mode when facing a drill bit with a large diameter, although the two modes can effectively clamp and fix the drill bit, the two modes have certain application ranges respectively, so that the drill bit clamp needs to be replaced timely according to the size of the bore diameter when drilling an inner bore with a larger difference, therefore, in the drilling process, not only the drill bit needs to be replaced timely, but also a proper clamp needs to be selected according to the diameter of the drill bit, further, the working time of the whole machine tool drilling operation is greatly increased, and the two clamping and fixing modes need to use a tool to disassemble and replace the drill bit when replacing the drill bit (particularly the thread extrusion fixing mode), the whole operation steps are more complicated and time-consuming, and the working time of the machining of different apertures of the workpiece is further prolonged.

Disclosure of Invention

Technical problem to be solved

The invention provides an eccentric clamping mechanism for a lathe tool, which has the advantages of wide application range of the diameter of a drill bit, capability of realizing manual disassembly and replacement of the drill bit, no need of an additional tool, simple operation steps and greatly shortened working time for processing a hole position of a workpiece, and solves the problems that the drill bit can be effectively fixed by two existing drill bit clamping modes, but the two existing drill bit clamping modes have certain application ranges respectively, so that the drill bit clamp needs to be replaced timely according to the size of the hole diameter when an inner hole with larger difference is drilled, a proper clamp needs to be selected according to the diameter of the drill bit in the drilling process, the working time of the drilling operation of the whole machine tool is greatly prolonged, and the drill bit can be disassembled and replaced only by using a tool when the drill bit is replaced by the two clamping and fixing modes, the whole operation steps are more complicated and time-consuming, and the working time for processing different apertures of the workpiece is further prolonged.

(II) technical scheme

The invention provides the following technical scheme: the utility model provides an eccentric formula fixture for lathe tool, includes the installation cassette, the bottom fixed mounting of installation cassette has the transmission sleeve, the middle part of transmission sleeve inner chamber one side is equipped with eccentric slider, the middle part movable sleeve of transmission sleeve inner chamber is equipped with movable sleeve, movable sleeve's surface is equipped with eccentric spout, and contacts each other between the eccentric slider on eccentric spout and the transmission sleeve, movable sleeve's inside is equipped with the annular slotted hole, and is equipped with in the inner chamber of annular slotted hole and fills out the gasbag, be equipped with the joint recess on the movable sleeve inner wall.

Preferably, the central axis of the mounting clamping seat and the central axis of the movable sleeve are located at the same position, the middle part of the inner cavity of the movable sleeve is designed to be in a convex structural shape, and the movable sleeve is made of elastic rubber.

Preferably, the central axis of the movable sleeve and the central axis of the eccentric sliding groove are arranged in an eccentric structure, and the two sides of the eccentric sliding groove are symmetrically arranged at an angle of 45 degrees.

Preferably, the gap between the annular slot and the air-filling bladder is filled with two thirds of the shear thickening fluid.

Preferably, the filling air bag is of a hollow structure made of elastic colloid materials, and one third of inert gas is filled in the filling air bag.

(III) advantageous effects

The invention has the following beneficial effects:

1. the eccentric clamping mechanism for the lathe tool can change the shear thickening liquid and the filling air bag in the inner cavity of the annular slotted hole into a solid state when the movable sleeve is eccentrically extruded by the eccentric slide block, thereby providing stable and effective clamping force for the drill bit and ensuring that the drill bit is not easy to slip in the drilling process, and the shear thickening liquid can be always kept in a liquid state when not eccentrically extruded by the eccentric slide block, thereby being capable of deforming along with the diameter of the drill bit, so that the clamping mechanism can be effectively suitable for the drill bits with different diameters, compared with the prior drill bit clamp technology, the problem that the clamp needs to be replaced due to the replacement of the drill bit in the drilling process is effectively avoided, and the assembly, disassembly and replacement can be completed without contacting other tools, the operation steps of the drilling head replacement are greatly simplified, and the time for drilling the workpiece is shortened.

2. This an eccentric formula fixture for lathe tool is 45 jiaos of symmetrical arrangement's setting to being between the eccentric spout both sides for no matter transmission main shaft is clockwise rotation or anticlockwise rotation, all can exert certain extrusion force to the movable sleeve through the eccentric slider on the transmission sleeve, thereby avoided this eccentric formula drill bit clamping mechanism can only be along the problem of a direction centre gripping drill bit, and then improved this eccentric formula clamping mechanism's stability and adaptability effectively.

3. This eccentric formula fixture for lathe tool, to filling the material of gasbag and the inside setting that has inert gas that is filled for can change the volume size of self immediately according to movable sleeve's pressurized condition, thereby ensure that the shear thickening liquid in the annular slotted hole inner chamber can fill the annular slotted hole all the time and fill the clearance between the gasbag, and then ensured that movable sleeve can all ensure equivalent clamping-force when the drill bit of different diameters of centre gripping, and then improved this eccentric formula fixture's stability and reliability effectively.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a transmission sleeve of the present invention;

FIG. 3 is a schematic view of the movable sleeve of the present invention;

fig. 4 is a bottom cross-sectional view of a structural movable sleeve of the present invention.

In the figure: 1. installing a card seat; 2. a drive sleeve; 3. an eccentric slider; 4. a movable sleeve; 5. an eccentric chute; 6. an annular slot; 7. filling the air bag; 8. clamping the groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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. 1-4, an eccentric clamping mechanism for a lathe tool comprises a mounting base 1, a transmission sleeve 2 is fixedly mounted at the bottom end of the mounting base 1, an eccentric slider 3 is arranged in the middle of one side of an inner cavity of the transmission sleeve 2, a movable sleeve 4 is movably sleeved in the middle of the inner cavity of the transmission sleeve 2, an eccentric sliding groove 5 is formed in the outer surface of the movable sleeve 4, the eccentric sliding groove 5 and the eccentric slider 3 on the transmission sleeve 2 are in contact with each other, an annular groove hole 6 is formed in the movable sleeve 4, a gas filling bag 7 is arranged in the inner cavity of the annular groove hole 6, and a clamping groove 8 is formed in the inner wall of the movable sleeve 4.

In this technical scheme, the axis of installation cassette 1 is located the same position with the axis of activity sleeve 4 to the middle part of 4 inner chambers of activity sleeve is established to bellied structural form, and what activity sleeve 4 adopted simultaneously is that the elastic rubber material made forms.

The arrangement of the central axis between the installation clamping seat 1 and the movable sleeve 4 ensures that the drill bit clamped and fixed on the movable sleeve 4 can keep the same coaxiality with the transmission main shaft, so that the phenomenon of circular runout can not occur in the process of driving the drill bit to rotate at a high speed, and the precision of the clamping mechanism for clamping the drill bit is effectively improved.

Wherein, to the inner structure of activity sleeve 4 and the setting of material, make it can apply certain stable effectual pretightning force to the drill bit, cause it when shutting down and changing the drill bit, it can not take place the phenomenon that drops automatically under the action of gravity, and then has protected the drill bit effectively and has made it can not take place the phenomenon of damage because of falling suddenly.

In this technical scheme, be eccentric structure's setting between the axis of activity sleeve 4 and the axis of eccentric spout 5, be 45 jiaos of symmetrical arrangement between the both sides of eccentric spout 5 simultaneously.

The arrangement of the eccentric structure in the middle axial direction between the movable sleeve 4 and the eccentric sliding groove 5 enables the transmission sleeve 2 to extrude the movable sleeve 4 under the action of the eccentric sliding block 3 to effectively clamp the drill bit when rotating at a high speed along with the transmission main shaft.

Wherein, be the setting of 45 jiaos of symmetrical arrangement between 5 sides to eccentric spout for no matter transmission main shaft is clockwise rotation or anticlockwise rotation, all can exert certain extrusion force to movable sleeve 4 through eccentric slider 3 on the transmission sleeve 2, in order to avoid this eccentric formula drill bit clamping mechanism can only follow the problem of a direction centre gripping drill bit, and then improved this clamping mechanism's reliability and stability effectively.

Wherein, to the setting of joint recess 8 in the inner wall of movable sleeve 4 for movable sleeve 4 can take place certain deformation thereupon when the drill bit of different diameters of centre gripping, causes to keep good contact between the upper surface of movable sleeve 4's inner wall and the drill bit, and the phenomenon of difficult emergence skidding.

In the technical scheme, two thirds of shear thickening liquid is filled in the gap between the annular slotted hole 6 and the filling air bag 7.

Wherein, to the setting of shear thickening liquid in the 6 inner chambers of annular slotted hole on the activity sleeve 4, can become the state of solid when activity sleeve 4 receives the eccentric extrusion of eccentric slider 3 to can provide stable effectual clamping-force for the drill bit, make its phenomenon of skidding at the in-process difficult emergence of drilling, can keep the state of liquid all the time when this shear thickening liquid does not receive the eccentric extrusion of eccentric slider 3 simultaneously, thereby can be along with the size of drill bit bore along with it takes place to warp, and then improved this clamping mechanism's application scope effectively.

In the technical scheme, the air filling bag 7 is of a hollow structure made of elastic colloid materials, and one third of inert gas is filled in the air filling bag.

The material of the filling air bag 7 and the arrangement that the inner part of the filling air bag is filled with inert gas enable the volume of the filling air bag 7 to be changed immediately according to the pressure condition of the movable sleeve 4, so that the shear thickening liquid in the inner cavity of the annular slotted hole 6 can be ensured to be filled in the gap between the annular slotted hole 6 and the filling air bag 7 all the time, further the movable sleeve 4 is ensured to ensure equivalent clamping force when clamping drill bits with different diameters, and the stability and the reliability of the eccentric clamping mechanism are further improved.

The use method and the working principle of the embodiment are as follows:

firstly, the clamping mechanism is fixedly arranged on a transmission main shaft by utilizing the mounting clamping seat 1, then a proper drill bit needing drilling is selected, the drill bit is slowly inserted into the movable sleeve 4 from the lower part of the mechanism, simultaneously, under the air pressure action of the shearing thickening liquid and the air filling bag 7 in the annular slotted hole 6, the pre-clamping action of the inserted drill bit can be realized, then, a lathe can be started, the transmission main shaft is driven to rotate at a high speed, and simultaneously, under the sliding action of the eccentric sliding block 3 and the movable sleeve 4, the eccentric sliding block 3 realizes the eccentric extrusion action on the movable sleeve 4, so that the shearing thickening liquid in the inner cavity of the annular slotted hole 6 is changed into a solid state due to extrusion, and further, the drill bit can be stably and effectively clamped by the movable sleeve 4, the deviation is not easy to occur, and the clamping and fixing operation of the drill bit can be completed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An eccentric fixture for lathe tool, including installation cassette (1), its characterized in that: the bottom fixed mounting who installs cassette (1) has transmission sleeve (2), the middle part of transmission sleeve (2) inner chamber one side is equipped with eccentric slider (3), the middle part movable sleeve of transmission sleeve (2) inner chamber is equipped with movable sleeve (4), the surface of movable sleeve (4) is equipped with eccentric spout (5), and contacts each other between eccentric slider (3) on eccentric spout (5) and transmission sleeve (2), the inside of movable sleeve (4) is equipped with annular slotted hole (6), and is equipped with in the inner chamber of annular slotted hole (6) and fills gasbag (7), be equipped with joint recess (8) on movable sleeve (4) inner wall, it has two-thirds shear thickening liquid to fill in the clearance between annular slotted hole (6) and the packing gasbag (7).

2. An eccentric clamping mechanism for a lathe tool according to claim 1, wherein: the central axis of the mounting clamping seat (1) and the central axis of the movable sleeve (4) are located at the same position, the middle of the inner cavity of the movable sleeve (4) is designed to be in a convex structural shape, and the movable sleeve (4) is made of elastic rubber materials.

3. An eccentric clamping mechanism for a lathe tool according to claim 1, wherein: the device is characterized in that an eccentric structure is arranged between the central axis of the movable sleeve (4) and the central axis of the eccentric sliding groove (5), and meanwhile, the two sides of the eccentric sliding groove (5) are symmetrically arranged at an angle of 45 degrees.

4. An eccentric clamping mechanism for a lathe tool according to claim 1, wherein: the filling air bag (7) is of a hollow structure made of elastic colloid materials, and one third of inert gas is filled in the filling air bag.