CN103143790B - Gear hobbing clamp for clamping synchronizer gear - Google Patents

Gear hobbing clamp for clamping synchronizer gear Download PDF

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Publication number
CN103143790B
CN103143790B CN201310110418.3A CN201310110418A CN103143790B CN 103143790 B CN103143790 B CN 103143790B CN 201310110418 A CN201310110418 A CN 201310110418A CN 103143790 B CN103143790 B CN 103143790B
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China
Prior art keywords
expansion
gear
pull bar
clamp
swelling
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CN201310110418.3A
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CN103143790A (en
Inventor
段含辉
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CHONGQING WINSTAR PRECISE MACHINERY Co Ltd
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CHONGQING WINSTAR PRECISE MACHINERY Co Ltd
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Abstract

The invention discloses a gear hobbing clamp for clamping a synchronizer gear. The middle part of a pull rod is provided with an annular positioning boss; a three-section structure, which comprises a guide cylindrical section, a conical expansion section and a threaded section respectively, is arranged on the right side of the annular positioning boss; an end face positioning disc, an expansion sleeve and a pressing nut are coaxially sleeved on the right part of the pull rod; the end face positioning disc is positioned on the guide cylindrical section of the pull rod; the pressing nut is positioned on the threaded section of the pull rod; a sleeve part is arranged on the right part of the expansion sleeve, and the rest part is an expansion part; the sleeve part is sleeved on the threaded section of the pull rod and extends into a circular groove in the left end part of the pressing nut; the inner end of a stop screw extends into an annular groove in the outer wall of the sleeve part of the pull rod; the outer end of the stop screw is arranged in a radial threaded hole in the pressing nut; and an inner hole of the expansion part of the expansion sleeve is matched with the conical expansion section of the pull rod, and the left part of the expansion part is provided with an axial groove. According to the gear hobbing clamp, an inner splined hole of a gear blank is positioned through the expansion part of the expansion sleeve, the positioning accuracy is high, and the gear blank is convenient to assemble and the gear is also convenient to disassemble after gear hobbing.

Description

A kind of gear-hobbing clamp for clamping gear of synchronizer
Technical field
The invention belongs to field of fixtures, specifically, particularly relate to a kind of gear-hobbing clamp for clamping gear of synchronizer.
Background technology
Gear is a kind of vitals on synchronized, and its endoporus is usually splined hole.At present, we usually adopt gear-hobbing machine to process gear of synchronizer, carry out the tooth base P of clamping gear usually through gear-hobbing clamp as shown in Figure 1 during processing, this gear-hobbing clamp comprises pull bar 1, on pull bar 1, coaxial sleeve is equipped with clamping fixture seat 2, mandrel 3, packing ring 4 and nut 5 successively from left to right, and wherein the annular installation base 2a of clamping fixture seat 2 left end is connected with gear-hobbing machine by the screw axially arranged.The periphery of described mandrel 3 is provided with spline, and this spline is used for positioning tooth base P, and tooth base P is clamped between the right side of clamping fixture seat 2 and the left side of packing ring 4.In use, we find that existing gear-hobbing clamp mainly exists following defect:
1, because existing gear-hobbing clamp adopts the internal splined hole of axle sleeve mode to tooth base to position, be so just difficult to ensure positioning precision, usually occur eccentric situation during clamping tooth base, thus can not machining accuracy be ensured;
When 2, tearing gear open after toothing base P and gear hobbing, all need dismounting nut 5 and packing ring 4, troublesome poeration, wastes time and energy.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of gear-hobbing clamp for clamping gear of synchronizer, for ensureing clamping precision, and tears gear open after being convenient to toothing base and gear hobbing simultaneously.
Technical scheme of the present invention is as follows: a kind of gear-hobbing clamp for clamping gear of synchronizer, comprise pull bar (1), the left end of this pull bar is annular installation base, this annular installation base has installing hole (1a) vertically, it is characterized in that: the middle part of described pull bar (1) is circular orientation boss, the right side of this circular orientation boss is the three stage structure that diameter reduces from left to right successively, and is respectively guide cylinder section, conical expansion section and thread segment; Described pull bar (1) right part coaxial sleeve is equipped with end face positioning disk (6), expansion set (7) and clamp nut (8), and wherein end face positioning disk (6) is positioned in the guide cylinder section of pull bar (1), and clamp nut (8) is positioned on the thread segment of pull bar (1); Described expansion set (7) right part is suit portion, all the other positions are swelling portion, and suit portion is sleeved on the thread segment of pull bar (1), and stretch in the circular trough of described clamp nut (8) left part, and only the inner of head screw (9) is stretched in the cannelure on pull bar (1) suit portion outer wall, the outer end should stopping head screw is contained in the radial screw bore on clamp nut (8); The endoporus in described expansion set (7) swelling portion and the conical expansion section of pull bar (1) adapt, the left part in this swelling portion is circumferentially provided with inside and outside through axial groove, and the swelling portion between adjacent two axial grooves is provided with external splines, and the diameter of expansion set (7) swelling portion outer spline section is greater than the external diameter of described clamp nut (8), but be less than the external diameter of described end face positioning disk (6).
External diameter due to described expansion set (7) swelling portion is greater than the external diameter of clamp nut (8), so just directly tooth base (P) can be enclosed within the swelling portion of expansion set (7), expansion set (7) is driven to move axially left by tightening clamp nut (8) again, thus the swelling portion of expansion set (7) is matched with the conical expansion section of pull bar (1), the internal splined hole of tooth base (P) is positioned, to carry out gear hobbing process during swelling portion swelling so by expansion set (7).Because the internal splined hole of periphery to tooth base (P) by expansion set (7) swelling portion positions, so just high than the positioning precision of traditional gear-hobbing clamp.
After completing gear hobbing process, by spanner or other instruments, clamp nut (8) is unclamped, this clamp nut (8) drives expansion set (7) to move axially to the right by stopping head screw (9), thus make the swelling portion of expansion set (7) recover deformation, so just the gear obtained after processing can be unclamped, directly gear is taken off, simple to operation.
Adopt above technical scheme, the present invention is positioned by the internal splined hole of swelling portion swelling to tooth base (P) of expansion set (7), positioning precision is high, and it is all more convenient to unload gear after toothing base (P) and gear hobbing, dismounting nuts and washers need not be needed again as conventional brace, effectively overcome the defect of traditional gear-hobbing clamp, there is good applicability, be suitable for extensively promoting the use.
As optimal design value, the tapering of described pull bar (1) conical expansion section is 10 ° to 15 °.In above structure, the tapering of pull bar (1) conical expansion section can not be excessive, again can not be too small, and excessive words easily make tension force excessive, and then expansion set (7) was lost efficacy, and too small words easily cause self-locking again.
As preferably, the right part in described expansion set (7) swelling portion radially has passage (7a), so just can be discharged by the air in expansion set (7) in time, thus be convenient to clamping tooth base (P).
The suit portion of described expansion set (7) is set with one piece of round clamp (10), and this round clamp is clamped between the right side in expansion set (7) swelling portion and the left side of described clamp nut (8).Adopt above structure, by round clamp (10), this fixture ensures that expansion set (7) is in circumferencial direction uniform force, thus ensures that expansion set (7) in circumferencial direction distortion evenly, and then ensures clamping precision, improves the serviceability of this fixture.
Beneficial effect: the present invention is positioned by the internal splined hole of swelling portion swelling to tooth base (P) of expansion set (7), positioning precision is high, and it is all more convenient to unload gear after toothing base (P) and gear hobbing, dismounting nuts and washers need not be needed again as conventional brace, effectively overcome the defect of traditional gear-hobbing clamp, there is good applicability, be suitable for extensively promoting the use.
Accompanying drawing explanation
Fig. 1 is the structural representation of conventional brace;
Fig. 2 is the clamp structure schematic diagram after improving.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 2, a kind of gear-hobbing clamp for clamping gear of synchronizer, is formed primarily of pull bar 1, end face positioning disk 6, expansion set 7, clamp nut 8, only head screw 9 and round clamp 10.Wherein, the left end of described pull bar 1 is annular installation base (not marking in figure), and this annular installation base has installing hole 1a vertically, and pull bar 1 is by being located in screw in this installing hole 1a and gear-hobbing machine is fixed.The middle part of described pull bar 1 is circular orientation boss, pull bar 1 on the right side of this circular orientation boss is three stage structure, and be followed successively by guide cylinder section, conical expansion section and thread segment from left to right, this diameter of three sections reduces from left to right successively, and the diameter of guide cylinder section is less than the diameter of circular orientation boss.The conical expansion section of described pull bar 1 is left large and right small, and the tapering of this conical expansion section is 10 ° to 15 °, and can be optimized for 15 ° further.
As can be seen from Figure 2, the right part coaxial sleeve of described pull bar 1 is equipped with end face positioning disk 6, expansion set 7 and clamp nut 8, and wherein end face positioning disk 6 is positioned in the guide cylinder section of pull bar 1, and clamp nut 8 is positioned on the thread segment of pull bar 1.The structure of described expansion set 7 is substantially identical with the expansion set structure of existing extensive employing, and is metalwork, and the right part of this expansion set 7 is suit portion, and all the other positions are swelling portion.And, the suit portion of described expansion set 7 is sleeved on the thread segment of pull bar 1, and stretch in the circular trough (not marking in figure) of described clamp nut 8 left part, and only the inner of head screw 9 is stretched in the cannelure (not marking in figure) on pull bar 1 suit portion outer wall, the outer end should stopping head screw 9 is contained in the radial screw bore on clamp nut 8.When clamp nut 8 is tightened or unclamped on the thread segment of pull bar 1, expansion set 7 is driven to move axially along pull bar 1 to left or right by stopping head screw 9.
The described endoporus in expansion set 7 swelling portion and the conical expansion section of pull bar 1 adapt, and the left part in expansion set 7 swelling portion is circumferentially provided with multiple axial groove (not marking in figure), this axial groove runs through the inner and outer wall of expansion set 7 simultaneously, and the swelling portion between adjacent two axial grooves is provided with external splines, and the right part in expansion set 7 swelling portion radially has passage 7a.Further, the diameter of described expansion set 7 swelling portion outer spline section is greater than the external diameter of clamp nut 8, but is less than the external diameter of described end face positioning disk 6.
In addition, the suit portion of described expansion set 7 is set with one piece of round clamp 10, and between the right side that this round clamp 10 is clamped in expansion set 7 swelling portion and the left side of described clamp nut 8, and the external diameter of round clamp 10 is identical with the external diameter of clamp nut 8.
The foregoing is only preferred embodiment of the present invention, is not restriction with the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (4)

1. the gear-hobbing clamp for clamping gear of synchronizer, comprise pull bar (1), the left end of this pull bar is annular installation base, this annular installation base has installing hole (1a) vertically, it is characterized in that: the middle part of described pull bar (1) is circular orientation boss, the right side of this circular orientation boss is the three stage structure that diameter reduces from left to right successively, and is respectively guide cylinder section, conical expansion section and thread segment; Described pull bar (1) right part coaxial sleeve is equipped with end face positioning disk (6), expansion set (7) and clamp nut (8), and wherein end face positioning disk (6) is positioned in the guide cylinder section of pull bar (1), and clamp nut (8) is positioned on the thread segment of pull bar (1); Described expansion set (7) right part is suit portion, all the other positions are swelling portion, and suit portion is sleeved on the thread segment of pull bar (1), and stretch in the circular trough of described clamp nut (8) left part, and only the inner of head screw (9) is stretched in the cannelure on pull bar (1) suit portion outer wall, the outer end should stopping head screw is contained in the radial screw bore on clamp nut (8); The endoporus in described expansion set (7) swelling portion and the conical expansion section of pull bar (1) adapt, the left part in this swelling portion is circumferentially provided with inside and outside through axial groove, and the swelling portion between adjacent two axial grooves is provided with external splines, and the diameter of expansion set (7) swelling portion outer spline section is greater than the external diameter of described clamp nut (8), but be less than the external diameter of described end face positioning disk (6).
2. the gear-hobbing clamp for clamping gear of synchronizer according to claim 1, is characterized in that: the tapering of described pull bar (1) conical expansion section is 10 ° to 15 °.
3. the gear-hobbing clamp for clamping gear of synchronizer according to claim 1 and 2, is characterized in that: the right part in described expansion set (7) swelling portion radially has passage (7a).
4. the gear-hobbing clamp for clamping gear of synchronizer according to claim 3, it is characterized in that: the suit portion of described expansion set (7) is set with one piece of round clamp (10), and this round clamp is clamped between the right side in expansion set (7) swelling portion and the left side of described clamp nut (8).
CN201310110418.3A 2013-04-01 2013-04-01 Gear hobbing clamp for clamping synchronizer gear Active CN103143790B (en)

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CN201310110418.3A CN103143790B (en) 2013-04-01 2013-04-01 Gear hobbing clamp for clamping synchronizer gear

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Application Number Priority Date Filing Date Title
CN201310110418.3A CN103143790B (en) 2013-04-01 2013-04-01 Gear hobbing clamp for clamping synchronizer gear

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CN103143790B true CN103143790B (en) 2015-06-17

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103990859A (en) * 2014-05-29 2014-08-20 江苏金长城减速机有限公司 Mill pinlon tool
CN104475877A (en) * 2014-12-07 2015-04-01 重庆市璧山县振昌汽车配件有限公司 Hobbing clamping device for clutch collars of synchronizers
CN104842020B (en) * 2015-04-27 2017-04-05 上海理工大学 The fixture of clamping cylindrical straight gear involute spline holes gear
CN110465707B (en) * 2019-08-23 2020-10-13 中原工学院 General type double circular arc gear processingequipment
CN110497040B (en) * 2019-09-02 2021-04-06 姜依辰 Mechanical expansion type gear shaving clamp for machining large gear ring
CN111715949A (en) * 2020-06-29 2020-09-29 綦江重配齿轮有限公司 Gear grinding tool for internal spline gear

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH081417A (en) * 1994-06-14 1996-01-09 Fukutoku Dia:Kk Taper expanding mandrel
CN202239978U (en) * 2011-08-29 2012-05-30 安徽天瑞精密汽车零部件有限公司 Gear shaving expansion sleeve
CN202701523U (en) * 2012-07-01 2013-01-30 十堰港汉实业有限公司 High-precision expandable gear shaving clamp
CN203197406U (en) * 2013-04-01 2013-09-18 重庆永达精密机械有限公司 Gear hobbing clamp for clamping synchronizer gear

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH081417A (en) * 1994-06-14 1996-01-09 Fukutoku Dia:Kk Taper expanding mandrel
CN202239978U (en) * 2011-08-29 2012-05-30 安徽天瑞精密汽车零部件有限公司 Gear shaving expansion sleeve
CN202701523U (en) * 2012-07-01 2013-01-30 十堰港汉实业有限公司 High-precision expandable gear shaving clamp
CN203197406U (en) * 2013-04-01 2013-09-18 重庆永达精密机械有限公司 Gear hobbing clamp for clamping synchronizer gear

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