CN211449533U - Three-cone synchronizer of transmission - Google Patents

Three-cone synchronizer of transmission Download PDF

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Publication number
CN211449533U
CN211449533U CN201922482841.1U CN201922482841U CN211449533U CN 211449533 U CN211449533 U CN 211449533U CN 201922482841 U CN201922482841 U CN 201922482841U CN 211449533 U CN211449533 U CN 211449533U
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ring
gear
synchronizer
tooth
conical surface
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CN201922482841.1U
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成崎
沈亚军
陈继红
周衡
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Qijiang Gear Transmission Co Ltd
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Qijiang Gear Transmission Co Ltd
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Abstract

The utility model relates to a derailleur technical field specifically discloses a tricone synchronizer of derailleur, including toothholder, tooth cover, combination ring gear, synchronizer ring, intermediate ring and inner ring, the tooth cover sets up in the toothholder outside, has seted up the spout on the circumference of toothholder, is equipped with spring and ejector pad in the spout, and the ejector pad is established at the ejector pad outside to the spring cover, and the ejector pad offsets with the inboard of tooth cover, combines the ring gear to fix respectively in the both sides of toothholder, and synchronizer ring, intermediate ring and inner ring are from outer empty cover in proper order between combination ring gear and tooth cover to interior, combine to form friction conical surface I between the external cone face of ring gear and the inner ring internal cone, and the internal cone face of inner ring and the internal cone face of intermediate ring form friction conical surface II, and the external cone face of intermediate ring and the internal cone face of synchronizer ring form friction conical surface III. Adopt the technical scheme in this patent to shorten the time of shifting and the power of shifting, and then improved the travelling comfort of shifting.

Description

Three-cone synchronizer of transmission
Technical Field
The utility model relates to a derailleur technical field, in particular to tricone synchronizer of derailleur.
Background
Synchronizers are commonly used during shifting of modern mechanical gear transmissions. Because the synchronizer is arranged between the gears, the meshing of the gears can be ensured not to be impacted when the gears are shifted, the shifting noise is eliminated, and the service life of the gears is prolonged. In addition, with the improvement of energy conservation, environmental protection and light weight requirements of people on automobiles, the synchronizer is expected to be capable of rapidly and reliably carrying out synchronous engagement and smooth gear shifting and simultaneously has larger synchronous capacity due to the limitation of the size and the mass of the transmission.
At present, the common sliding block type synchronizer is generally only provided with one or two conical surfaces, the friction torque generated by the synchronizer during gear shifting is insufficient, the gear shifting time is prolonged, the gear shifting force is increased, the gear shifting comfort is reduced, and the service life of the synchronizer is shortened. Therefore, shorten the synchronizing time, reduce the power of shifting, improve the travelling comfort of shifting, promote synchronizer life, be my key direction of research and development to the synchronizer at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a tricone synchronizer of derailleur to the friction torque who solves current synchronizer and produce when shifting is not enough, leads to the time of shifting to increase, and the power of shifting increases, makes the problem that synchronizer life reduced simultaneously.
In order to achieve the above purpose, the technical scheme of the utility model is that:
the utility model provides a three cone synchronizer of derailleur, includes toothholder, tooth cover, combines ring gear, synchronizer ring, intermediate ring and inner ring, the tooth cover sets up in the toothholder outside, has seted up the spout on the circumference of toothholder, is equipped with spring and ejector pad in the spout, and the spring housing is established outside the ejector pad, and the ejector pad offsets with the inboard of toothholder, combines the ring gear to fix respectively in the both sides of toothholder, and synchronizer ring, intermediate ring and inner ring empty cover in proper order from outside to inside between combining ring gear and toothholder, form friction conical surface I between the outer conical surface of combination ring gear and the inner ring's the inner conical surface, and the inner ring's outer conical surface forms friction conical surface II with the inner conical surface of intermediate ring, and the outer conical surface of intermediate ring forms friction conical surface III with the inner conical surface of synchronizer ring.
The technical principle and the effect of the technical scheme are as follows:
1. compared with a traditional single-cone synchronizer or a traditional double-cone synchronizer, the three friction conical surfaces are arranged in the scheme, namely three friction pairs are formed, so that the friction torque is improved by nearly 3 times when the gear is shifted, the gear shifting time and the gear shifting force are shortened, and the gear shifting comfort is improved.
2. In addition, due to the increase of the friction pairs, the area of the friction pairs is increased, and the contact stress of a single friction pair is correspondingly reduced, so that the service life of the whole synchronizer is prolonged; this scheme simple structure, processing is convenient, and the performance of shifting is good and the time of shifting is short, and the synchronizer life-span obviously improves.
Furthermore, the spout has been seted up a plurality ofly, and a plurality of spouts along the circumference equipartition of toothholder.
Has the advantages that: the setting of a plurality of spouts for the ejector pad supports the tight effect more stable to the ring gear, and a plurality of spout circumference equipartitions, makes the ejector pad to the effort evenly distributed of ring gear.
Furthermore, a square hole is formed in the circumferential surface of the combined gear ring, a boss is arranged on the outer circumference of the middle ring along the contour line of the middle ring, and the boss is inserted into the square hole.
Has the advantages that: the boss is inserted into the square hole, so that the gear ring and the intermediate ring are combined to form a whole during working, and the rotating speeds of the gear ring and the intermediate ring are consistent.
Furthermore, the square holes and the bosses are provided with a plurality of square holes which are uniformly distributed along the circumferential direction of the combined gear ring, and the bosses are uniformly distributed along the circumferential direction of the middle ring.
Has the advantages that: the arrangement of the square holes and the bosses improves the connection stability between the combined gear ring and the intermediate ring.
Furthermore, the circumferential surface of the tooth holder is also provided with limiting holes, the limiting holes are positioned between the sliding grooves, connecting blocks are clamped in the limiting holes, the connecting blocks are respectively provided with a groove I and a groove II, a clamping block sleeved in the groove I is fixed on the inner side of the synchronizing ring, and a clamping table sleeved in the groove II is fixed on the inner side of the inner ring.
Has the advantages that: the synchronous ring, the inner ring and the tooth holder are connected into a whole through the connecting block, so that the rotating speeds of the synchronous ring, the inner ring and the tooth holder are consistent during working.
Furthermore, the limiting holes are uniformly distributed on the circumferential surface of the tooth holder, the connecting blocks are clamped in the limiting holes, the synchronizing ring is provided with a plurality of clamping blocks opposite to the groove I, and the inner ring is provided with a plurality of clamping tables opposite to the groove II.
Has the advantages that: the arrangement of the plurality of limiting holes and the connecting block improves the connection stability between the synchronizing ring and the inner ring and between the synchronizing ring and the tooth holder.
Further, the circumference of the inner periphery of the gear sleeve is provided with spline inner teeth, the outer peripheries of the synchronizing ring and the combined gear ring are both provided with spline outer teeth along the circumference, and the gear seat, the synchronizing ring and the combined gear ring are connected with the gear sleeve in a spline mode.
Has the advantages that: the arrangement is such that the toothed sleeve can slide on the toothed seat, the synchronizing ring and the coupling toothed ring.
Furthermore, be equipped with locking face I on the spline internal tooth of tooth cover, be equipped with locking face II on the spline external tooth of synchronizer ring, be equipped with locking face III on the spline external tooth that combines the ring gear.
Has the advantages that: therefore, when the gear is shifted, the gear sleeve is shifted by the gear shifting fork to move axially outwards, the locking surface I on the gear sleeve is contacted with the locking surface II on the synchronizing ring to generate positive pressure, the positive pressure can be decomposed into an axial component and a circumferential component, the circumferential component generates shifting ring torque for shifting the synchronizing ring to rotate, and due to the existence of input end inertia torque, the shifting ring torque cannot enable the gear sleeve and the synchronizing ring to rotate relatively, so that the synchronizing ring cannot slide outwards along the axial direction.
And the shifting fork continuously applies axial thrust to the gear sleeve, so that conical surfaces of the synchronizing ring, the combined gear ring, the intermediate ring and the inner ring are compressed to generate friction torque, the conical surfaces generate friction torque which is continuously increased along with the continuous increase of the axial thrust, when the maximum value of the friction torque is equal to the input end inertia torque, the friction torque and the input end inertia torque are mutually counteracted, the gear sleeve and the synchronizing ring are relatively rotated by the shifting ring torque, the locking surface I is disengaged from the locking surface II, and the gear sleeve can freely pass through the synchronizing ring. And after the gear sleeve passes through the synchronous ring, the gear sleeve is continuously contacted with the locking surface III of the combined gear ring to generate shifting ring torque again, and the gear sleeve continuously passes through the combined gear ring to finish stable gear shifting.
Furthermore, the bottom of the sliding groove is provided with a blind hole with the diameter smaller than that of the sliding groove, the push block comprises a push rod and a cylindrical head, the push rod is located in the blind hole, and a limiting mechanism for limiting the circumferential direction of the push rod is arranged in the blind hole.
Has the advantages that: because when shifting, the tooth cover is at the slip in-process, and the ejector pad can produce certain circumference skew under the effect of tooth cover, consequently sets up the circumference skew that blind hole and stop gear can effectual reduction ejector pad, improves the stability of shifting.
Further, stop gear includes embracing circle and support bar, and the embracing circle cover is established outside the push rod, bonds on the embracing circle inner wall and has the rubber layer, and the rubber layer is hugged closely with the outer wall of push rod, and support bar one end is fixed on the embracing circle outer wall, and the other end is fixed on the blind hole inner wall.
Has the advantages that: the arrangement has the advantages that the circumferential movement of the push rod is limited, the axial movement of the push rod is not influenced, the arrangement of the rubber layer reduces the abrasion between the push rod and the embracing ring, and the service life is prolonged.
Drawings
Fig. 1 is a cross-sectional view of the three-cone synchronizer of the present invention installed between a high-gear and a low-gear;
FIG. 2 is a cross-sectional view of the three-cone synchronizer of the present invention;
FIG. 3 is an exploded view of the tri-cone synchronizer of the present invention;
FIG. 4 is a perspective view of the middle tooth sleeve of the present invention;
FIG. 5 is a perspective view of the synchronizer ring according to the present invention;
FIG. 6 is a perspective view of the middle joint ring gear of the present invention;
FIG. 7 is a perspective view of the connection between the middle tooth sleeve and the tooth holder of the present invention;
FIG. 8 is a perspective view of the synchronizer ring and the coupling ring gear of the present invention;
fig. 9 is a perspective view of the middle coupling block of the present invention;
fig. 10 is a schematic view of a blind hole in embodiment 2 of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: tooth cover 1, locking face I1 a, annular 1b, synchronizer ring 2, fixture block 2a, locking face II 2b, combine ring gear 3, locking face III 3b, intermediate ring 4, boss 4a, inner ring 5, ka tai 5a, spring 6, ejector pad 7, toothholder 8, spout 8a, high fender gear 9, low fender gear 10, connecting block 11, groove I11 a, groove II 11b, friction conical surface I21, friction conical surface II 22, friction conical surface III 23, blind hole 24, push rod 25, embracing ring 26, 27 support bar.
Example 1 is substantially as shown in figures 1, 2 and 3 of the accompanying drawings:
the utility model provides a tricone synchronizer of derailleur, including the toothholder 8 that is located between high gear 9 and the low gear 10, tooth cover 1, two combination ring gears 3, two synchronizer rings 2, two intermediate ring 4 and two inner ring 5, wherein tooth cover 1 sets up in the outside of toothholder 8, it is shown to combine figure 7, three spout has been seted up on the circumference of toothholder 8, the circumference equipartition of toothholder 8 is followed to three spout, be equipped with spring 6 and ejector pad 7 in the spout, the cover of spring 6 is established outside ejector pad 7, ejector pad 7 offsets with the inboard of toothholder 1.
The two combined gear rings 3 are respectively arranged at two sides of the gear seat 8, the two combined gear rings 3 are respectively fixed with the high-gear 9 and the low-gear 10 in a spline or welding mode, the synchronous ring 2, the intermediate ring 4 and the inner ring 5 are sequentially sleeved between the combined gear rings 3 and the gear sleeve 1 from outside to inside in an empty mode, namely the inner ring 5 is sleeved on the combined gear rings 3 in an empty mode, the intermediate ring 4 is sleeved on the inner ring 5 in an empty mode, and the synchronous ring 2 is sleeved on the intermediate ring 4 in an empty mode, so that the outer conical surface of the intermediate ring 4 and the inner conical surface of the synchronous ring 2 form a friction conical surface I21, the outer conical surface of the inner ring 5 and the inner conical surface of the intermediate ring 4 form a friction conical surface II, and the outer conical surface of the combined gear rings 3 and the inner.
As shown in fig. 6, six square holes are formed in the circumferential surface of the coupling ring gear 3, the six square holes are uniformly distributed on the end surface of the coupling ring gear 3, six bosses 4a are provided on the outer periphery of the intermediate ring 4 along the contour line thereof, and as shown in fig. 8, the six bosses 4a are respectively fitted in the six square holes of the coupling ring gear 3, so that the intermediate ring 4, the coupling ring gear 3 and the high-speed gear 9 (or the low-speed gear 10) are connected into a whole and rotate at the same speed when in operation.
As shown in fig. 7, three limiting holes are further formed in the circumferential surface of the tooth holder 8, a connecting block is clamped in each limiting hole, as shown in fig. 9, a groove i 11a and a groove ii 11b are formed in the connecting block, a plurality of clamping blocks 2a are fixed on the inner side of the synchronizing ring 2, a plurality of clamping platforms 5a are fixed on the inner side of the inner ring 5, the clamping blocks 2a are sleeved in the grooves i 11a, and the clamping platforms 5a are sleeved in the grooves ii 11b, so that when the synchronous ring works, the synchronizing ring 2, the inner ring 5 and the connecting block are connected into a whole, and the rotating speeds are consistent.
As shown in fig. 4, spline internal teeth are provided on the inner periphery of the sleeve 1 in the circumferential direction thereof, and locking surfaces i 1a are provided on the spline internal teeth, as shown in fig. 5, spline external teeth are provided on the outer periphery of the synchronizer ring 2 in the circumferential direction thereof, and locking surfaces ii 2b are provided on the spline external teeth, and as shown in fig. 6, spline external teeth are also provided on the outer periphery of the ring gear 3 in the circumferential direction thereof, and locking surfaces iii 3b are provided on the spline external teeth. Namely, the tooth holder 8, the synchronizing ring 2, the combined gear ring 3 and the tooth sleeve 1 are connected in a spline mode, and meanwhile, the tooth sleeve 1 can slide on the tooth holder 8, the synchronizing ring 2 and the combined gear ring 3 by adopting clearance fit.
In neutral gear: the conical surfaces of the synchronizing ring 2, the combined gear ring 3, the intermediate ring 4 and the inner ring 5 are in a separated state, namely, an empty sleeve state.
During gear shifting, the gear shifting fork is positioned in the annular groove 1b and shifts the gear sleeve 1 to move axially outwards, the locking surface I1 a on the gear sleeve 1 is contacted with the locking surface II 2b on the synchronizing ring 2 to generate a positive pressure, the positive pressure can be decomposed into an axial component and a circumferential component, the circumferential component generates a shifting ring moment for shifting the synchronizing ring 2 to rotate, but due to the existence of the inertia torque of the input end, the shifting ring moment cannot enable the gear sleeve 1 and the synchronizing ring 2 to rotate relatively, so that the synchronizing ring 2 cannot slide outwards along the axial direction.
The shifting fork continues to apply axial thrust to the gear sleeve 1, so that the conical surfaces of the synchronizing ring 2, the combined gear ring 3, the intermediate ring 4 and the inner ring 5 are pressed tightly to generate friction torque, the friction torque generated by the conical surfaces is continuously increased along with the continuous increase of the axial thrust, when the maximum value of the friction torque is equal to the input end inertia torque, the friction torque and the input end inertia torque are mutually offset, the gear sleeve 1 and the synchronizing ring 2 are relatively rotated by the shifting ring torque, the locking surface I1 a is separated from the locking surface II 2b, and the gear sleeve 1 can freely pass through the synchronizing ring 2.
In a similar way, after the gear sleeve 1 passes through the synchronizing ring 2, the gear sleeve continues to be in contact with the locking surface III 3b of the combined gear ring 3, the ring shifting torque is generated again, and the gear sleeve 1 continues to complete gear shifting through the combined gear ring 3.
Example 2 is substantially as shown in figure 10:
the difference from example 1 is that: the bottom of spout has been seted up blind hole 24, the aperture of blind hole 24 is less than the aperture of spout, form the step between blind hole 24 and the spout promptly, ejector pad 7 includes push rod 25 and cylinder head, the diameter of cylinder head is greater than the diameter of push rod 25, push rod 25 one end stretches into in the blind hole 24, one end is fixed with the cylinder head, wherein spring 6 cover is established outside push rod 25, spring 6 one end offsets with the bottom of cylinder head promptly, the other end offsets with the step, be equipped with stop gear in blind hole 24, wherein stop gear includes band 26 and support bar 27, wherein band 26 cover is established outside push rod 25, it has the rubber layer to bond on the inner wall of band 26, the rubber layer is hugged closely with the outer wall of push rod 25, support bar 27 is equipped with many, support bar 27 one end is fixed at band 26 outer wall, the other end.
During gear shifting, the gear sleeve 1 has a circumferential limiting effect on the push rod 25 due to the embracing ring 26 during sliding, so that the offset of the push block 7 in the circumferential direction is reduced.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (10)

1. The utility model provides a tricone synchronizer of derailleur, includes toothholder, tooth cover, combines ring gear, synchronizer ring, intermediate ring and inner ring, its characterized in that: the tooth sleeve is arranged outside the tooth base, a sliding groove is formed in the circumference of the tooth base, a spring and a pushing block are arranged in the sliding groove, the spring sleeve is arranged outside the pushing block, the pushing block abuts against the inner side of the tooth sleeve, the combined gear rings are fixed on two sides of the tooth base respectively, the synchronizing ring, the middle ring and the inner ring are sequentially sleeved between the combined gear rings and the tooth sleeve in a hollow mode from outside to inside, a friction conical surface I is formed between the outer conical surface of the combined gear rings and the inner conical surface of the inner ring, a friction conical surface II is formed between the outer conical surface of the inner ring and the inner conical surface of the middle ring, and a friction conical surface III is formed between the outer.
2. The tri-cone synchronizer for a transmission of claim 1 wherein: the spout is seted up a plurality ofly, and a plurality of spouts along the circumference equipartition of toothholder.
3. The tri-cone synchronizer for a transmission of claim 2 wherein: the periphery of the combined gear ring is provided with a square hole, the periphery of the intermediate ring is provided with a boss along the contour line of the intermediate ring, and the boss is inserted into the square hole.
4. The tri-cone synchronizer for a transmission of claim 3 wherein: the square holes and the bosses are provided with a plurality of square holes which are uniformly distributed along the circumferential direction of the combined gear ring, and the bosses are uniformly distributed along the circumferential direction of the intermediate ring.
5. The tri-cone synchronizer for a transmission of claim 4 wherein: the gear rack is characterized in that a limiting hole is further formed in the circumferential surface of the gear rack and located between the sliding grooves, a connecting block is clamped in the limiting hole and provided with a groove I and a groove II respectively, a clamping block sleeved in the groove I is fixed on the inner side of the synchronizing ring, and a clamping table sleeved in the groove II is fixed on the inner side of the inner ring.
6. The tri-cone synchronizer for a transmission of claim 5 wherein: the limiting holes are arranged in plurality and are uniformly distributed on the circumferential surface of the tooth holder, the connecting blocks are clamped in the limiting holes, the synchronizing ring is provided with a plurality of clamping blocks opposite to the groove I, and the inner ring is provided with a plurality of clamping tables opposite to the groove II.
7. The tri-cone synchronizer for a transmission of claim 6 wherein: the circumference of the inner periphery of the gear sleeve is provided with spline internal teeth, the outer peripheries of the synchronizing ring and the combined gear ring are provided with spline external teeth along the circumference, and the gear seat, the synchronizing ring and the combined gear ring are connected with the gear sleeve in a spline mode.
8. The tri-cone synchronizer for a transmission of claim 7 wherein: be equipped with locking face I on the spline internal tooth of tooth cover, be equipped with locking face II on the spline external tooth of synchronizer ring, be equipped with locking face III on the spline external tooth that combines the ring gear.
9. The tricone synchronizer of a transmission according to any one of claims 1 to 8, characterized in that: the push block comprises a push rod and a cylindrical head, the push rod is located in the blind hole, and a limiting mechanism for limiting the circumferential direction of the push rod is arranged in the blind hole.
10. The tri-cone synchronizer for a transmission of claim 9 wherein: stop gear includes embracing circle and support bar, and the embracing circle cover is established outside the push rod, bonds on the embracing circle inner wall and has the rubber layer, and the rubber layer is hugged closely with the outer wall of push rod, and support bar one end is fixed on embracing the circle outer wall, and the other end is fixed on the blind hole inner wall.
CN201922482841.1U 2019-12-31 2019-12-31 Three-cone synchronizer of transmission Active CN211449533U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110985616A (en) * 2019-12-31 2020-04-10 綦江齿轮传动有限公司 Three-cone synchronizer of transmission
CN112360895A (en) * 2020-11-25 2021-02-12 珠海格力电器股份有限公司 Gear hub for synchronizer and synchronizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110985616A (en) * 2019-12-31 2020-04-10 綦江齿轮传动有限公司 Three-cone synchronizer of transmission
CN112360895A (en) * 2020-11-25 2021-02-12 珠海格力电器股份有限公司 Gear hub for synchronizer and synchronizer

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