CN204565439U - Gear and the optimization Welding Structure in conjunction with tooth - Google Patents
Gear and the optimization Welding Structure in conjunction with tooth Download PDFInfo
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- CN204565439U CN204565439U CN201520193653.6U CN201520193653U CN204565439U CN 204565439 U CN204565439 U CN 204565439U CN 201520193653 U CN201520193653 U CN 201520193653U CN 204565439 U CN204565439 U CN 204565439U
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Abstract
A kind of speed changer manufactures the gear in field and the optimization Welding Structure in conjunction with tooth, it is characterized in that, comprise: annular shifting gear and annular are in conjunction with tooth, wherein: the junction surface of shifting gear is interference fit with the press-in portion in conjunction with tooth, and the lower surface at junction surface forms with the upper surface of press-in portion the first hole and the second hole that are communicated with.The utility model both ensure that the assembly precision requirement of part, again reduce processing cost, the rear weld uniform force of final realization welding, the effect that welding stability is high, and the weld seam formed is positioned at outside the end face of part, facilitates the quality examination of weld job and weld part.
Description
Technical field
The utility model relates to the technology that a kind of speed changer manufactures field, specifically a kind of gear and the optimization Welding Structure in conjunction with tooth.
Background technology
As the kernel component in automotive transmission, change gear directly affects the shift property of speed changer with the Welding Structure in conjunction with tooth.At present published relate to change gear with in conjunction with the Welding Structure of tooth, there is a lot of defect, as pad discontinuity; The high temperature air that welding is formed fuses in weld seam and forms bubble, affects weld strength; Welding Structure is unreasonable causes weld job difficulty, weld part quality examination difficulty; Assemble welding precision is not high.Therefore, design a kind of excellent gear and the Welding Structure in conjunction with tooth, evade the service behaviour that described defect can improve automotive transmission greatly.
Shao Liang proposes in " analysis of speed changer driven gear fatigue cracking " (the 6th phase Automobile Technology and Material in 2012): for determining the reason of certain light-duty speed changer driven gear early fatigue cracking, splits carnassial tooth wheel and has carried out fracture macroscopic analysis, the measurement of weld penetration, metallographic structure and Hardness Surveillance.On the basis of Physicochemical test, in conjunction with microfractograph and fracture mechanism, the reason to driven gear fatigue cracking is analyzed.Result shows, fatigue cracking originates from the edge of electron beam welding welding seam, and be polyphyly torsional mode shape fatigue cracking, subsequent transformation becomes the fatigue cracking of gear hub; Cause the reason of fatigue cracking to be the insufficient (incomplete) penetration of weld seam, weld penetration deficiency then tilts to depart from joint close relevant with electron beam.
Size that Tang Zhongrong, Zhang Yi propose shift of transmission power in " automobile synchronizer tooth ring relevant design Parameter analysis " evaluates one of handling important indicator of car load, automobile synchronizer tooth ring whether reasonable in design, has material impact to shift of transmission power.Analyze relevant parameter in the synchro converter ring course of work, to the Different Effects of gear shifting force, to inquire into seeking more rational synchronizing tooth ring relevant parameter in the design.
Subject matter in welding procedure is, the amount of heat produced in welding process, air in member cavity is expanded in a large number, air can not get the words got rid of, the pressure in member cavity can be caused to increase, both affect the joint compactness of weldment, and weld seam bubble can have been formed again, and cause weld strength to die down.In addition, in welding procedure, the degree of depth of weld seam is more than or equal to the intensity of 1/2nd guarantee weld seams of the mating surface degree of depth.But in order to improve the shift property of automotive transmission, needing to improve shifting gear and the accuracy class requirement in conjunction with tooth mating surface, to increase the machining accuracy of weld end face, but also can increase part difficulty of processing like this, improve manufacturing cost.
Through finding the retrieval of prior art, open (bulletin) the day 2015.03.04 of Chinese patent literature CN204186835U, disclose a kind of detachable automobile speed-changer synchronizer, comprise shifting gear, in conjunction with tooth and friction conical ring be split-type structural, the axial extension of rear side of shifting gear is provided with shifting gear external splines, excircle in conjunction with tooth is provided with in conjunction with tooth external splines, inner periphery in conjunction with tooth is provided with in conjunction with tooth internal spline, is provided with several jacks of circumferentially uniform array in conjunction with tooth; Friction conical ring is provided with and mates several corresponding pawls with jack, is equipped with heat radiation blind slot on the inwall of friction conical ring and on the outer wall of synchronous ring, is provided with thermal grease bar in heat radiation blind slot.But the shifting gear in this technology and being combined by interior external splines in conjunction with tooth, may produce the play of circumferential and axial, not have the bond strength of welding high; And by spline joint, very high to matching requirements, easily cause larger accumulated error; Part time job is of long duration, even there will be the phenomenon connecting and loosen, thus causes part failure.
Chinese patent literature CN1785576, open (bulletin) day 2006.06.14, disclose a kind of laser welding processing method of gear of welding technology field, by the adjustment of the basic parameter to welding, and increase prewelding, rear weldering step, guarantee that fusion penetration and the postwelding moment of torsion of welding alloy structural steel reach requirement, concrete steps are: machining process control, weldering front cleaning, weldering front clean, prewelding, deep penetration welding, rear weldering, shield gas flow rate control; The basic parameter of described welding comprises defocusing amount, deep penetration welding power, deep penetration welding linear velocity.But a large amount of high temperature airs welding generation in this technology cannot be discharged at solder side, fuse in weld seam and form bubble, affect welding quality.
Utility model content
Deficiency described in the utility model exists for prior art, a kind of gear and the optimization Welding Structure in conjunction with tooth are proposed, pass through ingehious design, both ensure that the assembly precision requirement of part, again reduce processing cost, the rear weld uniform force of final realization welding, the effect that welding stability is high, and the weld seam formed is positioned at outside the end face of part, facilitates the quality examination of weld job and weld part.
The utility model is achieved through the following technical solutions:
The utility model comprises: annular shifting gear and annular in conjunction with tooth, wherein: the junction surface of shifting gear is interference fit with the press-in portion in conjunction with tooth, and the lower surface at junction surface forms with the upper surface of press-in portion the first hole and the second hole that are communicated with.
The first described hole refers to: the junction surface of shifting gear is provided with the first cannelure, and correspondence is provided with the second cannelure in conjunction with the press-in portion of tooth, and the lower surface of the first cannelure and the upper surface of the second cannelure form described first hole.
The second described hole refers to: the press-in portion in conjunction with tooth is provided with the 3rd cannelure, and the upper surface of the 3rd cannelure and the lower surface at junction surface form described second hole.
Be provided with communicating passage between the first described hole and the second hole, communicating passage is positioned at the right side of the axis in the first hole, when shifting gear with coordinate in conjunction with tooth after, communicating passage is communicated with the first hole and the second hole.
The second described hole is provided with heat dissipation channel and realizes exhaust, and this heat dissipation channel is positioned at the position to be welded opposite side of mating surface.
Described interference fit refers to: described junction surface is concordant with the end face of press-in portion and form an annular junction, when carrying out after this junction welded one week by Laser Welding or electron beam welding, can forming circular weld.
Described heat dissipation channel is specifically positioned at the gear part in conjunction with tooth and is connected with the second hole, thus discharges also final from the first hole to the second hole for the air of expanded by heating.
The junction surface of described shifting gear adopts step structure with the press-in portion in conjunction with tooth, is specially: the left part aperture d of the axis in the first hole in the junction surface of shifting gear
1Lthan its right part aperture d
1Rlittle 0.01mm; In conjunction with the left part diameter of axle d of the axis in the first hole in the press-in portion of tooth
2Lthan its right part diameter of axle d
2Rlittle 0.01mm.
Technique effect
Compared with prior art, the utility model is in high-temperature soldering process, and the high temperature air formed in the first hole is finally got rid of by communicating passage, the second hole and heat dissipation channel, effectively prevents gas from fusing in weld seam and forms bubble, improve weld strength; Pad uniform force, avoids that the depth of weld is long and weld penetration that is that cause is uneven; Assemble welding precision is high, ensure that the requirement on machining accuracy of part, especially the end face machining accuracy of weldment; The junction surface be press-fitted and press-in portion adopt stepped size design, and the shaft hole matching of first pressing adopts slightly large size, and the shaft hole matching of rear pressure adopts slightly little size, ensure that the part be first pressed into can not be worn, and are beneficial to press-fit steadily; Reasonable welding structure, weld job and weld part quality examination simple etc.
Accompanying drawing explanation
Fig. 1 is structural upright schematic diagram of the present utility model;
Fig. 2 is structural front view of the present utility model;
Fig. 3 is section of structure of the present utility model;
Fig. 4 is partial enlarged drawing of the present utility model;
Fig. 5 is pad enlarged drawing of the present utility model;
Fig. 6 is the section of structure of shifting gear;
Fig. 7 is the profile of shifting gear;
Fig. 8 is the structural representation in conjunction with tooth;
Fig. 9 is the profile in conjunction with tooth;
Figure 10 is Fig. 9 close-up schematic view;
In figure: shifting gear 1, in conjunction with tooth 2, circular weld 3, first cannelure 4, second cannelure 5, the 3rd cannelure 6, communicating passage 7, heat dissipation channel 8.
Detailed description of the invention
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment 1
As shown in Figures 1 to 3, the present embodiment relates to a kind of gear and the Welding Structure in conjunction with tooth, comprise: the annular shifting gear 1 with gear part and junction surface and the annular with gear part and press-in portion in conjunction with tooth 2, wherein: the junction surface b of shifting gear 1 is interference fit with the press-in portion a in conjunction with tooth 2.
As shown in Figure 4, the junction surface b of described shifting gear 1 is provided with the first cannelure 4, and the press-in portion a in conjunction with tooth 2 is provided with the second cannelure 5, forms the first hole when making the first cannelure 4 and the second cannelure 5 after described interference fit.
Described interference fit refers to: annular shifting gear 1 and annular in conjunction with the junction surface of tooth 2 and the end face of press-in portion concordant and form an annular junction, when carrying out after this junction welded one week by Laser Welding or electron beam welding, circular weld 3 can being formed.
As shown in Figure 5, when carrying out high-temperature soldering, the junction surface that circular weld 3 is formed at shifting gear 1 with in conjunction with the junction on the press-in portion end face of tooth 2, the i.e. left side of the axis in the first hole.
As shown in Figure 5, the junction surface b of described shifting gear 1 is provided with communicating passage 7, and communicating passage 7 is positioned at the right side of the axis in the first hole, when shifting gear 1 with coordinate in conjunction with tooth 2 after, communicating passage 7 is communicated with the passage in the first hole and the second hole.
Described communicating passage 7 can be several axial grooves along shifting gear 1 axis, and can be maybe helicla flute as shown in figures 6 and 7, these spiral fluted two ends be connected with the second hole with the first hole respectively.
As shown in Fig. 5, Fig. 9 and Figure 10, the described press-in portion a in conjunction with tooth 2 is provided with the 3rd cannelure 6, is positioned at the right side of the axis in the first hole, and the 3rd cannelure 6 forms the second hole with the junction surface of shifting gear 1;
As shown in Fig. 5 and Figure 10, the described gear part in conjunction with tooth 2 has the heat dissipation channel 8 in connection second hole, thus discharges also final from the first hole to the second hole for the air of expanded by heating.
The junction surface b of described shifting gear 1 adopts stepped size design with the press-in portion a in conjunction with tooth 2, and making to be press-fitted the part be first pressed in process can not be worn, and is specially:
The left part aperture d of the axis in the first hole in the junction surface b of described shifting gear 1
1Lthan its right part aperture d
1Rlittle 0.01mm.
The left part diameter of axle d of the described axis in conjunction with the first hole in the press-in portion a of tooth 2
2Lthan its right part diameter of axle d
2Rlittle 0.01mm.
During automotive transmission work, gear shift is frequent, the utility model is in order to improve the shift property of automotive transmission, shifting gear 1 and the mating surface in conjunction with tooth 2 drive cannelure, the first cavity energy formed reduces the grinding area of mating surface, thus both ensure that the assembly precision requirement of part, again reduce processing cost.
Simultaneously, the junction surface of the shifting gear 1 be press-fitted adopts stepped size design with the press-in portion in conjunction with tooth 2, the shaft hole matching be first pressed into adopts slightly large size, the shaft hole matching of rear press-in adopts slightly little size, ensure that the part be first pressed into can not be worn, be beneficial to press-fit steadily, thus improve welding quality.
In addition, in welding procedure, the degree of depth of weld seam is more than or equal to the intensity of 1/2nd guarantee weld seams of the mating surface degree of depth.In the utility model, the mating surface of the both sides in the first hole all adopts interference fit, welds in the left side in the first hole, right side is used for location, and the overall length of mating surface has shortened, and the depth of weld is shortened, reduce the difficulty of welding job, ensure that the uniform force of weld simultaneously.And this welding method, the weld seam of formation is positioned at outside the end face of part, facilitates the quality examination of weld job and weld part.
Claims (9)
1. a gear and the optimization Welding Structure in conjunction with tooth, it is characterized in that, comprise: annular shifting gear and annular are in conjunction with tooth, wherein: the junction surface of shifting gear is interference fit with the press-in portion in conjunction with tooth, and the lower surface at junction surface forms with the upper surface of press-in portion the first hole and the second hole that are communicated with.
2. gear according to claim 1 and the optimization Welding Structure in conjunction with tooth, it is characterized in that, the first described hole refers to: the junction surface of shifting gear is provided with the first cannelure, correspondence is provided with the second cannelure in conjunction with the press-in portion of tooth, and the lower surface of the first cannelure and the upper surface of the second cannelure form described first hole.
3. gear according to claim 1 and the optimization Welding Structure in conjunction with tooth, it is characterized in that, the second described hole refers to: the press-in portion in conjunction with tooth is provided with the 3rd cannelure, and the upper surface of the 3rd cannelure and the lower surface at junction surface form described second hole.
4. the gear according to claim 1 or 2 or 3 and the optimization Welding Structure in conjunction with tooth, it is characterized in that, communicating passage is provided with between the first described hole and the second hole, communicating passage is positioned at the right side of the axis in the first hole, when shifting gear with coordinate in conjunction with tooth after, communicating passage is communicated with the first hole and the second hole.
5. the gear according to claim 1 or 3 and the optimization Welding Structure in conjunction with tooth, it is characterized in that, the second described hole is provided with heat dissipation channel and realizes exhaust, and this heat dissipation channel is positioned at the position to be welded opposite side of mating surface.
6. gear according to claim 1 and the optimization Welding Structure in conjunction with tooth, it is characterized in that, described interference fit refers to: described junction surface is concordant with the end face of press-in portion and form an annular junction, when carrying out after this junction welded one week by Laser Welding or electron beam welding, can circular weld being formed.
7. gear according to claim 5 and the optimization Welding Structure in conjunction with tooth, it is characterized in that, described heat dissipation channel is specifically positioned at the gear part in conjunction with tooth and is connected with the second hole.
8. the gear according to claim 1 or 2 or 3 or 6 and the optimization Welding Structure in conjunction with tooth, is characterized in that, the junction surface of described shifting gear adopts step structure with the press-in portion in conjunction with tooth.
9. gear according to claim 8 and the optimization Welding Structure in conjunction with tooth, is characterized in that, the left part aperture d of the axis in the first hole in the junction surface of described shifting gear
1Lthan its right part aperture d
1Rlittle 0.01mm; In conjunction with the left part diameter of axle d of the axis in the first hole in the press-in portion of tooth
2Lthan its right part diameter of axle d
2Rlittle 0.01mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193653.6U CN204565439U (en) | 2015-04-01 | 2015-04-01 | Gear and the optimization Welding Structure in conjunction with tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193653.6U CN204565439U (en) | 2015-04-01 | 2015-04-01 | Gear and the optimization Welding Structure in conjunction with tooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204565439U true CN204565439U (en) | 2015-08-19 |
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ID=53858130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520193653.6U Active CN204565439U (en) | 2015-04-01 | 2015-04-01 | Gear and the optimization Welding Structure in conjunction with tooth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624674A (en) * | 2017-03-14 | 2017-05-10 | 芜湖万里扬变速器有限公司 | Machining process suitable for gear assembly of automobile transmission |
-
2015
- 2015-04-01 CN CN201520193653.6U patent/CN204565439U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624674A (en) * | 2017-03-14 | 2017-05-10 | 芜湖万里扬变速器有限公司 | Machining process suitable for gear assembly of automobile transmission |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |