CN203560415U - Gear shifting mechanism - Google Patents
Gear shifting mechanism Download PDFInfo
- Publication number
- CN203560415U CN203560415U CN201320610444.8U CN201320610444U CN203560415U CN 203560415 U CN203560415 U CN 203560415U CN 201320610444 U CN201320610444 U CN 201320610444U CN 203560415 U CN203560415 U CN 203560415U
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- CN
- China
- Prior art keywords
- handle
- gear
- shifting
- box
- shift fork
- Prior art date
- 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.)
- Expired - Fee Related
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- Gear-Shifting Mechanisms (AREA)
- Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
Abstract
A gear shifting mechanism comprises a shift fork structure (16) and a shifting slide gear (15) arranged on a transmission shaft (21), wherein the shift fork structure (16) comprises a handle (5) capable of being positioned on a gearbox (17), one end of the handle is connected with a declutch shift shaft (7) arranged on the gearbox, one end of the declutch shift shaft placed in the gearbox is connected with one end of a shift fork handle (9), a shifting block (10) is arranged at the other end of the shift fork handle, a step (18) is arranged at one end of the shifting slide gear, and connected with a bearing box (11) through a bearing, an operation hole (19) is formed in the outer wall of the bearing box, the shifting block is inserted into the operation hole, when the handle drives the declutch shift shaft to rotate, the shift fork handle controls the shifting block to stir the shifting slide gear, so that the purpose of changing gear mesh to shift the gear is realize. According to the gear shifting mechanism, the situation that the shifting block is not in contact with the shifting slide gear is ensured, so that the abrasion of the shifting block is reduced, and the operational reliability of the gear shifting mechanism is improved.
Description
Technical field
The utility model relates to a kind of gearshift for all kinds of machine speed changes, particularly a kind of gear and has along transmission shaft sliding trajectory and horizontal plane the gearshift of several angle.
Background technique
The machinery of rig Shi Duo operation mechanism, movement velocity, transmitted power difference that each operation mechanism requires when work, and also time and the working forms of work are also variant.Therefore, in the machine driven system of rig, gear must have suitable gearshift in order to change gear engagement, to reach the object of gearshift.
In domestic and international existing rig gearshift, extensively adopt shift fork handsetting gear to realize gearshift.
In Fig. 1, disclose a kind of existing gearshift, in figure, this gearshift is assemblied in shift fork at a certain gear teeth face two ends of shifting slide gear.During gearshift, shift fork inner side contacts with face of gear.Wherein, shift fork inside dimensions is relevant with this gear tooth width size.Shift fork rigging position is parallel to transmission shaft.
Also have in addition a kind of existing gearshift, this gearshift inserts shift fork the rectangular annular groove of shifting slide gear one end, by shift fork outer side surface pushing and pressing shifting slide gear, realizes gearshift.In this gearshift, shift fork inner side is tangent with rectangular annular groove inner circle, and shift fork thickness is relevant with rectangular annular groove width, and shift fork assembles perpendicular to transmission shaft.
From above-mentioned two kinds of gearshifts, existing gearshift is because shift fork directly contacts with face of gear, and shift fork is very easily squeezed, and in working procedure, can be subject to wearing and tearing in various degree, affects the reliability of gearshift work.In the process of especially vertically creeping at drill power head, shifting slide gear will be directly pressed against on shift fork face by effect of weight, cause shift fork wearing and tearing, and shift fork handle position produces skew relatively, will be unfavorable for that gearshift realizes reliable speed change.
Model utility content
Technical problem to be solved in the utility model is, for existing gearshift when the gear shift, shift fork directly contacts with face of gear, shift fork very easily weares and teares, thereby affect the deficiency of gearshift reliability, provide a kind of shift fork directly not contact with face of gear, thereby effectively guarantee the gearshift of gearshift reliability.
For solving the problems of the technologies described above, gearshift provided by the utility model comprises a shifting fork structure and is arranged at the shifting slide gear on transmission shaft, this shifting fork mechanism comprises the handle that can be positioned gear-box, one end of this handle is connected with the declutch shift shaft being arranged on gear-box, this declutch shift shaft is positioned at one end of one end connection shift fork handle of gear-box, and the other end of this shift fork handle arranges shifting block; One end of this shifting slide gear is provided with a step, and this step connects a bearing box through bearing, and the outer wall of this bearing box is provided with a handle hole; This shifting block is inserted in this handle hole, and during the rotation of stick control declutch shift shaft, shift fork handle control shifting block is stirred shifting slide gear.
One preferred implementation of such scheme is that this bearing is deep groove ball bearing.And the both sides of this deep groove ball bearing arrange circlip for hole and circlip for shaft.
The holding end of this handle is provided with a positioning device, and this positioning device comprises the location shank that is fixedly arranged on handle, in this location shank, through spring, is equiped with the locating stud being connected with taper knob, and this gear-box is provided with the multiple positioning holes that match with locating stud.
The outer rim of this bearing box has a boss, and shifting block is arranged on bearing box lug boss position.
Compared with prior art, the beneficial effect that the utility model has is: the utility model engages a bearing box in one end of shifting slide gear, and be provided with handle hole on the outer wall of bearing box, and the shift fork that tradition is adopted changes block-dialing structure into, while so just making to shift gears, shifting block does not directly contact with shifting slide gear, has reduced the wearing and tearing of shifting block, has improved gearshift reliability at work.The utility model has increased deep groove ball bearing, while guaranteeing the utility model for rig gearshift, in the vertical drilling process of unit head, shifting block does not directly contact with shifting slide gear, to reduce the wearing and tearing of shifting block, improve gearshift functional reliability, operate also more flexible.The both sides of deep groove ball bearing of the present utility model arrange circlip for hole and circlip for shaft, to limit the axial motion of deep groove ball bearing, have further guaranteed the stable engagement of shifting slide gear.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing gearshift one.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is that the vertical center line of Fig. 2 is analysed and observe view.
In figure: 1. taper knob 2. locating stud 3. springs 4. are located shank 5. handle 6. straight pin 7. declutch shift shaft 8. flat key 9. shift fork handle 10. shifting block 11. bearing box 12. circlip for hole 13. deep groove ball bearing 14. circlip for shaft 15. shifting slide gear 16. shifting fork structure 17. gear-box 18. step 19. handle hole 20. positioning hole 21. transmission shaft 22. shift forks.
Embodiment
As shown in Figure 2 and Figure 3, the utility model gearshift comprises a shifting fork structure and is arranged at the shifting slide gear 15 on transmission shaft 21.This shifting fork mechanism 16 comprises the left and right handle 5 that can be positioned gear-box 17, one end of this handle 5 is connected with the declutch shift shaft 7 being arranged on gear-box 17 through straight pin 6, one end that this declutch shift shaft 7 is positioned at gear-box 17 connects one end of shift fork handle 9 through flat key 8, the other end of this shift fork handle 9 arranges shifting block 10.One end of this shifting slide gear 15 is provided with a step 18, and this step 18 connects a bearing box 11 through deep groove ball bearing 13, and the outer wall of this bearing box 11 is provided with a handle hole 19.This shifting block 10 inserts in this handle hole 19, thereby by left and right handle 5, utilize straight pin 6 to handle declutch shift shaft 7, then coordinate with shift fork handle 9 by flat key 8, make shift fork handle 9 control shifting block 10 and stir shifting slide gear 15, thereby realize, change gear engagement states, reach gearshift object.The both sides of this deep groove ball bearing 13 arrange circlip for hole 12 and circlip for shaft 14, to limit the axial motion of deep groove ball bearing 13.The holding end of this handle 5 is provided with a positioning device, this positioning device comprises the location shank 4 that is fixedly arranged on handle 5, the interior locating stud 2 being connected with taper knob 1 that is equiped with through spring 3 of this location shank 4, on this gear-box 17, be also provided with the multiple positioning holes 20 that match with locating stud 2, after this locating stud 2 and positioning hole 20 combinations, can realize shifting slide gear 15 engaging position of not slipping away, when needs are shifted gears, axially handle sleeve 1 can be extracted the locating stud 2 connecting firmly with it, then utilize handle that locating stud 2 is threaded to predetermined positioning hole 20, release handle cover 1, rely on the elastic force of spring 3 to push away the location that locating stud 2 enters this positioning hole and realizes shifting slide gear 15.
Claims (5)
1. a gearshift, comprise a shifting fork structure (16) and be arranged at the shifting slide gear (15) on transmission shaft (21), it is characterized in that, this shifting fork mechanism (16) comprises the handle (5) that can be positioned gear-box (17), one end of this handle (5) is connected with the declutch shift shaft (7) being arranged on gear-box, this declutch shift shaft (7) is positioned at one end of one end connection shift fork handle (9) of gear-box, and the other end of this shift fork handle (9) arranges shifting block (10); One end of this shifting slide gear (15) is provided with a step (18), and this step (18) connects a bearing box (11) through bearing, and the outer wall of this bearing box (11) is provided with a handle hole (19); This shifting block (10) is inserted in this handle hole (19), and when handle (5) is handled declutch shift shaft (7) rotation, shift fork handle (9) is controlled shifting block (10) and stirred shifting slide gear (15).
2. gearshift according to claim 1, is characterized in that, this bearing is deep groove ball bearing (13).
3. gearshift according to claim 2, is characterized in that, the both sides of this deep groove ball bearing (13) arrange circlip for hole (12) and circlip for shaft (14).
4. gearshift according to claim 1, it is characterized in that, the holding end of this handle (5) is provided with a positioning device, this positioning device comprises the location shank (4) that is fixedly arranged on handle (5), in this location shank (4), through spring (3), be equiped with the locating stud (2) being connected with taper knob (1), this gear-box (17) is provided with the multiple positioning holes (20) that match with locating stud (2).
5. gearshift according to claim 1, is characterized in that, this bearing box (11) outer rim has a boss, and shifting block (10) is arranged on bearing box lug boss position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320610444.8U CN203560415U (en) | 2013-09-30 | 2013-09-30 | Gear shifting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320610444.8U CN203560415U (en) | 2013-09-30 | 2013-09-30 | Gear shifting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203560415U true CN203560415U (en) | 2014-04-23 |
Family
ID=50510136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320610444.8U Expired - Fee Related CN203560415U (en) | 2013-09-30 | 2013-09-30 | Gear shifting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203560415U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612845A (en) * | 2018-05-31 | 2018-10-02 | 四川理工学院 | A kind of gear slippage gear |
-
2013
- 2013-09-30 CN CN201320610444.8U patent/CN203560415U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612845A (en) * | 2018-05-31 | 2018-10-02 | 四川理工学院 | A kind of gear slippage gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20160930 |