CN202971870U - Shifting fork of transmission - Google Patents
Shifting fork of transmission Download PDFInfo
- Publication number
- CN202971870U CN202971870U CN 201220566902 CN201220566902U CN202971870U CN 202971870 U CN202971870 U CN 202971870U CN 201220566902 CN201220566902 CN 201220566902 CN 201220566902 U CN201220566902 U CN 201220566902U CN 202971870 U CN202971870 U CN 202971870U
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- CN
- China
- Prior art keywords
- guide block
- fork
- shifting
- wall
- ball
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a shifting fork of a transmission, which comprises a shifting fork body that is provided with openings, and two shifting blocks that are in an integral structure and are fixedly connected with the two open ends of the shifting fork body, wherein each shifting block comprises a cylindrical structure fixedly connected with the shifting fork body, and a rolling device capable of rolling along a shifting fork groove of a gear sleeve; the outer ends of the cylindrical structures penetrate through a wall of the shifting fork body axially; the inner ends of the cylindrical structures are mounted in the rolling devices in a inserting manner; and the rolling devices are embedded into the shifting fork grooves of the gear sleeve. According to the shifting fork of the transmission, a friction form between the shifting fork and the gear sleeve is changed, and the original sliding friction between the shifting blocks and the gear sleeve is changed into rolling friction between rolling bodies and the gear sleeve, so that the frictional resistance is reduced, the abrasion of the shifting blocks is reduced, the shifting performance of the transmission is improved, and the cleanliness in the transmission is ensured. The shifting fork is suitable for the transmissions in various vehicles.
Description
Technical field
The utility model belongs to the automotive transmission field, is specifically related to a kind of transmission selector fork.
Background technique
In vehicle traveling process, often can carry out gear shift operation according to different road conditions, gearshift is completed by speed changer.Transmission selector fork is to connect firmly on shifting shaft by the elastic opening pin at present, and during the transmission assembly assembling, shifting block embeds in the synchronizer gear sleeve outer surface groove, and the gearshift fork snaps in the gearshift axial trough.During gearshift, transmission of power is stirred shifting shaft to shifting gears fork, makes shift fork produce axial force, and drive shifting block driving gear cover is mobile is combined with synchronous gear, realizes the shift of transmission function.
The shift fork majority that uses on market now is aluminum material, be sliding friction between shifting block and tooth cover, surface friction drag is large, the resistance that the tooth cover need overcome when mobile is large, therefore the wearing and tearing of shifting block have been accelerated, impact gearshift performance, the aluminium bits that wearing and tearing simultaneously produce pollute speed changer inside, affect the spatter property of speed changer inside.
The model utility content
For solving the deficiencies in the prior art, the utility model provides a kind of transmission selector fork, by set up tourelle on shifting block, to change the friction type of shift fork and tooth cover, reduce surface friction drag, reduce the wearing and tearing of shifting block, thereby improve the shift of transmission performance, guarantee the turbidity test of speed changer inside.
For achieving the above object, the technological scheme that adopts of the utility model is as follows:
A kind of transmission selector fork, comprise that each shifting block comprises the cylindrical structure that connects firmly with the shift fork body and can overlap the tourelle that fork slot rolls along tooth with the shifting block of the shift fork body of opening and two integral structures connecting firmly mutually with two opening ends of shift fork body respectively; The outer end of described cylindrical structure connects the shift fork body wall vertically, and the inner is plugged in tourelle, and tourelle embeds in tooth cover fork slot.
As to restriction of the present utility model, described tourelle comprise be sleeved on the outer guide block in cylindrical structure bottom, be positioned at guide block week and with the retainer of guide block interference fit, also comprise driving the ball that shifting block moves and contacts with the shift fork cell wall in fork slot;
Ball is on the guide block wall, between the through hole that is provided with on the retainer wall, and the through hole on retainer is corresponding with the lead to the hole site on guide block, and the external diameter of ball is greater than the integral thickness between guide block wall and retainer, and the aperture of through hole is less than the external diameter of ball.
As further restriction of the present utility model:
Opening of the main body of described guide block, described cylindrical structure coordinates with the guide block plug-in mounting in the opening of the main body of guide block; Through hole is located on the guide block wall, on the retainer wall and two groove face corresponding positions radially fork slot, and the ball of guide block through being located between through hole radially the groove face place rolls with the tooth cover and coordinate in fork slot.
Cylindrical structural is positioned on the outer wall of this external part of shift fork along being circumferentially with groove; Be provided with in groove with its interference fit, be used for cylindrical structure is positioned snap ring on the shift fork body.
Further limit as of the present utility model, any one that is used for guide block and the fork slot radially through hole that coordinates of groove face is provided with at least two places, and ball is provided with at least two places.
Owing to having adopted technique scheme, the utility model compared with prior art, obtained technological progress is:
1. the setting of tourelle changes the friction type that shift fork and tooth overlap, and has reduced surface friction drag, has reduced the wearing and tearing of shifting block;
2. tourelle is designed to guide block, retainer and ball form, and original shifting block and tooth are overlapped the rolling friction that sliding friction becomes rolling element and tooth cover, has further reduced surface friction drag;
3. because ball contacts as the some contact with the tooth cover, make surface friction drag both less, the wearing and tearing of ball still less.
In sum, the utility model can improve the gearshift performance of speed changer, guarantees the turbidity test of speed changer inside, has characteristics simple in structure, easy processing.
The utility model is applicable on the speed changer of various vehicles.
Description of drawings
Below in conjunction with drawings and the specific embodiments, the utility model is done further to describe in detail.
Fig. 1 is the utility model embodiment's plane structure schematic diagram;
Fig. 2 is the annexation schematic diagram of middle cylindrical structure 2 embodiment illustrated in fig. 1, guide block 3, ball 4;
Fig. 3 is the plan view of Fig. 2;
Fig. 4 the utility model embodiment and the tooth cover 5 plane structure schematic diagram that are connected.
In figure: 1, shift fork body; 2, cylindrical structure; 3, guide block; 4, ball; 5, tooth cover; 6, retainer.
Embodiment
Embodiment
A kind of transmission selector fork, structure comprise shift fork body 1 and the shifting block of both ends open as shown in Figure 1.Shift fork body 1 is the n character form structure; Shifting block has two, and the wall thickness of shift fork body 1 is located and connected at the two ends that are fixed on respectively the opening of shift fork body 1.
As shown in Figure 2, each shifting block comprises cylindrical structure 2, and the tourelle that is comprised of ball 4, retainer 6 and guide block 3.
The outer end of cylindrical structure 2 connects shift fork body 1 wall vertically, and cylindrical structure 2 is positioned on the outer wall of the outer part of shift fork body 1 along being circumferentially with groove, is provided with the snap ring with its interference fit in groove, is used for cylindrical structure 2 is positioned shift fork body 1.The rear end of cylindrical structure 2 connects firmly on tourelle.
Retainer 6 is embedded in guide block 3, and with guide block 3 interference fit.Cylindrical structure 2 coordinates with guide block 3 plug-in mountings in the opening of guide block 3.
Two longer sidewalls of guide block 3 and fork slot two radially the groove face corresponding position be provided with through hole, position corresponding with through hole on retainer 6 is provided with circular hole, ball 4 is limited between every a pair of through hole and circular hole.The external diameter of ball 4 is greater than the aperture of through hole, circular hole, and the distance between corresponding through hole and circular hole is less than the external diameter (as shown in Figure 3) of ball.Ball 4 contacts with the radially groove face of the shift fork cell wall of tooth cover 5, and guide block 3 rolls with tooth cover 5 through ball 4 and coordinates.Ball 4 respectively is separated by on two longer sidewalls of guide block 3 and is provided with three.
As shown in Figure 4, when cylindrical structure 2 has relative movement with tooth cover 5, because rear end and the guide block 3 of cylindrical structure 2 connects firmly, the ball 4 that is positioned at guide block 3 through holes just drives cylindrical structure 2 and moves at fork slot, shifting block and the original sliding friction of fork slot are become the rolling friction of ball 4 and fork slot, thereby reduced surface friction drag, reduced the wearing and tearing of cylindrical structure 2.
Claims (5)
1. transmission selector fork comprises the shifting block with the shift fork body (1) of opening and two integral structures connecting firmly mutually with two opening ends of shift fork body (1) respectively,
It is characterized in that:Each shifting block comprises the cylindrical structure (2) that connects firmly with shift fork body (1) and the tourelle that can roll along tooth cover (5) fork slot; The outer end of described cylindrical structure (2) connects shift fork body (1) wall vertically, and the inner is plugged in tourelle, and tourelle embeds in tooth cover (5) fork slot.
2. transmission selector fork according to claim 1,
It is characterized in that:Described tourelle comprise be sleeved on the outer guide block (3) in cylindrical structure (2) bottom, be positioned at guide block (3) week and with the retainer (6) of guide block (3) interference fit, also comprise driving the ball (4) that shifting block moves and contacts with the shift fork cell wall in fork slot;
Between the through hole that ball (4) is positioned on guide block (3) wall, retainer (6) wall is provided with, through hole on retainer (6) is corresponding with the lead to the hole site on guide block (3), the external diameter of ball (4) is greater than the integral thickness between guide block (3) wall and retainer (6), and the aperture of through hole is less than the external diameter of ball (4).
3. transmission selector fork according to claim 2 is characterized in that: opening of the main body of described guide block (3), and described cylindrical structure (2) coordinates with guide block (3) plug-in mounting in the opening of the main body of guide block (3); Through hole is located on guide block (3) wall, on retainer (6) wall and two groove face corresponding positions radially fork slot, and the ball (4) of guide block (3) through being located between through hole radially the groove face place rolls with tooth cover (5) and coordinate in fork slot.
4. transmission selector fork according to claim 3,
It is characterized in that:Any one that is used for guide block (3) and the fork slot radially through hole that coordinates of groove face is provided with at least two places, and ball (4) is provided with at least two places.
5. according to claim 2,3 or 4 described transmission selector forks,
It is characterized in that:Cylindrical structural (2) is positioned on the outer wall of the outer part of shift fork body (1) along being circumferentially with groove;
Be provided with in groove with its interference fit, be used for cylindrical structure (2) is positioned snap ring on shift fork body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220566902 CN202971870U (en) | 2012-10-31 | 2012-10-31 | Shifting fork of transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220566902 CN202971870U (en) | 2012-10-31 | 2012-10-31 | Shifting fork of transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202971870U true CN202971870U (en) | 2013-06-05 |
Family
ID=48512947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220566902 Expired - Lifetime CN202971870U (en) | 2012-10-31 | 2012-10-31 | Shifting fork of transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202971870U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763746A (en) * | 2016-12-14 | 2017-05-31 | 无锡市盛源汽车配件厂 | Reinforce anticollision shift fork base |
| CN109386611A (en) * | 2018-11-21 | 2019-02-26 | 重庆青山工业有限责任公司 | A kind of selector fork mechanism |
| CN112621333A (en) * | 2020-12-23 | 2021-04-09 | 扬州力创机床有限公司 | Automatic gear shifting mechanism for machine tool spindle |
-
2012
- 2012-10-31 CN CN 201220566902 patent/CN202971870U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763746A (en) * | 2016-12-14 | 2017-05-31 | 无锡市盛源汽车配件厂 | Reinforce anticollision shift fork base |
| CN109386611A (en) * | 2018-11-21 | 2019-02-26 | 重庆青山工业有限责任公司 | A kind of selector fork mechanism |
| CN112621333A (en) * | 2020-12-23 | 2021-04-09 | 扬州力创机床有限公司 | Automatic gear shifting mechanism for machine tool spindle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
|
| CX01 | Expiry of patent term |