CN110185754A - A kind of vertical transfer gear box system - Google Patents
A kind of vertical transfer gear box system Download PDFInfo
- Publication number
- CN110185754A CN110185754A CN201910549229.3A CN201910549229A CN110185754A CN 110185754 A CN110185754 A CN 110185754A CN 201910549229 A CN201910549229 A CN 201910549229A CN 110185754 A CN110185754 A CN 110185754A
- Authority
- CN
- China
- Prior art keywords
- gear
- jackshaft
- countershaft
- shift fork
- vertical transfer
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
- F16H3/22—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially
- F16H3/30—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial
- F16H3/32—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial and an additional shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The present invention provides a kind of vertical transfer gear box system applied to heavy mechanical equipment transfer gear box technical field, countershaft-gear I (5) and countershaft-gear II (6) are set on the jackshaft (2) of the vertical transfer gear box system, axle shaft gear I (7) and axle shaft gear II (8) are set in drive shaft (3), vertical transfer gear box system further includes thrust ball bearing I (10), the bearing top race I (11) of thrust ball bearing I (10) is fixedly connected with shift fork (4) lower surface, bearing base circle I (12) is sleeved on jackshaft (2), bearing base circle I (12) is fixedly connected with countershaft-gear II (6) upper surface, ball I (13) is movably arranged on retainer I, vertical transfer gear box system of the invention, it can be effectively reduced shift fork and cunning Frictional force between moving gear reduces parts depreciation, improves shift fork and shifting slide gear service life, reduces part frequency of maintenance, improves production efficiency.
Description
Technical field
The invention belongs to heavy mechanical equipment transfer gear box technical fields, are to be related to a kind of vertical biography more specifically
Dynamic transmission system.
Background technique
Vertical transfer gear box is the important component for heavy mechanical equipment.In vertical transfer gear box system, by
It is arranged vertically in yoke bar and jackshaft and drive shaft, therefore, each component stress relationship and common gearbox are entirely different.
And in vertical transfer gear box system in the prior art, between shift fork and balladeur train group, frictional force is larger, so that component is ground
Damage is serious.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficiencies of the prior art, it is simple to provide a kind of structure, Neng Gougai
The way of contact for becoming shift fork and gear substantially reduces parts depreciation so that frictional force between shift fork and balladeur train be effectively reduced,
Shift fork and shifting slide gear service life are improved, part frequency of maintenance is reduced, improves the vertical transfer gear box system of production efficiency.
Solve the problems, such as techniques discussed above, the technical scheme adopted by the invention is as follows:
The present invention is a kind of vertical transfer gear box system, and the vertical transfer gear box system includes system casing,
Jackshaft, drive shaft, yoke bar are installed, jackshaft and drive shaft, yoke bar are disposed as vertically arranged knot in system casing
Countershaft-gear I and countershaft-gear II are arranged on jackshaft, axle shaft gear I and axle shaft gear is arranged in drive shaft for structure
II, the shift fork of yoke bar extends to intermediate shaft position, and vertical transfer gear box system further includes thrust ball bearing I, thrust ball axis
Holding I includes bearing top race I, bearing base circle I, retainer I, multiple balls I, and bearing top race I is sleeved on jackshaft, axis
It holds top race I to be fixedly connected with shift fork lower surface, bearing base circle I is sleeved on jackshaft, bearing base circle I and jackshaft tooth
It takes turns II upper surface to be fixedly connected, be movably arranged on retainer I by multiple balls I that gap is arranged circumferentially about, I activity folder of ball
Between bearing top race I and bearing base circle I.
The vertical transfer gear box system further includes thrust ball bearing II, and thrust ball bearing I includes bearing top race
II, bearing base circle II, retainer II, multiple balls II, bearing top race II are sleeved on jackshaft, bearing top race II with
Adjusting pad lower surface is fixedly connected, and bearing base circle II is sleeved on jackshaft, and bearing base circle II is fixed with shift fork upper surface
Connection, is movably arranged on retainer II, multiple II activities of ball are installed in axis by multiple balls II that gap is arranged circumferentially about
It holds between top race II and bearing base circle II, also sets up circlip for shaft on the jackshaft above adjusting pad.
The countershaft-gear I and countershaft-gear II of the vertical transfer gear box system are disposed as hanging down with jackshaft
The structure directly arranged, axle shaft gear I and axle shaft gear II are disposed as and the vertically arranged structure of drive shaft.
When the yoke bar of the vertical transfer gear box system drives shift fork to move up and down, shift fork is configured to drive
Countershaft-gear I and axle shaft gear I are engaging and are separating the structure switched between two states；The yoke bar, which drives, to be dialled
When fork moves up and down, shift fork is configured to that countershaft-gear II and axle shaft gear II is driven to engage and separating two states
Between the structure that switches.
Countershaft-gear III and countershaft-gear IV are also set up on the jackshaft, and drive shaft tooth is also set up in drive shaft
Wheel III and axle shaft gear IV.
The countershaft-gear III of the vertical transfer gear box system and countershaft-gear IV is disposed as and jackshaft
Vertically arranged structure, axle shaft gear III and axle shaft gear IV are disposed as and the vertically arranged structure of drive shaft.
When the yoke bar of the vertical transfer gear box system drives shift fork to move up and down, shift fork is configured to drive
Countershaft-gear III and axle shaft gear III are engaging and are separating the structure switched between two states.
Using technical solution of the present invention, can obtain it is below the utility model has the advantages that
Vertical transfer gear box system of the present invention, special construction for vertical transfer gear box system and faces
Specific question and propose.Because drive shaft, jackshaft, yoke bar are arranged vertically in vertical transfer gear box system, this
Sample, when Gear Contact on the shift fork and jackshaft of yoke bar, not only phase mutual friction, but also up and down direction stress, in this way, causing
Gear and shift fork serious wear, and replace and not only increase cost, but also is fairly cumbersome, influence equipment use.Therefore, needle of the present invention
To the defect of existing structure, local improvement is carried out, thrust ball bearing I is set, and by the bearing top race I of thrust ball bearing I
It is connected respectively from different components with bearing base circle I, in this way, when yoke bar drives shift fork movement, when shift fork and jackshaft tooth
When II contact of wheel, since multiple balls I, shift fork and countershaft-gear II being arranged between bearing top race I and bearing base circle I
Contact is changed to rolling friction from sliding friction, so that the frictional force between shift fork and gear be effectively reduced, use reliability is high, at
This is low, reduces the frictional dissipation of gearbox shift fork and gear during frequent movement, reduces maintenance cycle.It is of the present invention
Vertical transfer gear box system, structure is simple, can change the way of contact of shift fork and gear, so that shift fork and cunning be effectively reduced
Frictional force between moving gear substantially reduces parts depreciation, improves shift fork and shifting slide gear service life, reduces part maintenance frequency
Rate improves production efficiency.
Detailed description of the invention
Brief description is made to content expressed by each attached drawing of this specification and the label in figure below:
Fig. 1 is the broken section structural schematic diagram of vertical transfer gear box system of the present invention；
Fig. 2 is the partial enlargement structural representation of vertical transfer gear box system described in Fig. 1；
Attached drawing acceptance of the bid note is respectively as follows: 1, system casing；2, jackshaft；3, drive shaft；4, yoke bar；5, countershaft-gear I
(jackshaft balladeur train I)；6, countershaft-gear II (jackshaft balladeur train II)；7, axle shaft gear I；8, axle shaft gear
Ⅱ；9, shift fork；10, thrust ball bearing I；11, bearing top race I；12, bearing base circle I；13, ball I；14, thrust ball bearing
Ⅱ；15, bearing top race II；16, bearing base circle II；17, ball II；18, adjusting pad；19, circlip for shaft；20, in
Between shaft gear III (jackshaft balladeur train III)；21, countershaft-gear IV (the fixed gear IV of jackshaft)；22, axle shaft gear
Ⅲ；23, axle shaft gear IV.
Specific embodiment
Below against attached drawing, by the description of the embodiment, to for example related each structure of a specific embodiment of the invention
The works such as the shape of part, construction, the mutual alignment between each section and connection relationship, the effect of each section and working principle are further
Detailed description:
As shown in attached drawing 1, attached drawing 2, the present invention is a kind of vertical transfer gear box system, the vertical transfer gear box
System includes system casing 1, and jackshaft 2, drive shaft 3, yoke bar 4 are installed in system casing 1, and jackshaft 2 and drive shaft 3 are dialled
Fork arm 4 is disposed as vertically arranged structure, and countershaft-gear I 5 and countershaft-gear II 6, drive shaft 3 is arranged on jackshaft 2
Upper setting axle shaft gear I 7 and axle shaft gear II 8, the shift fork 9 of yoke bar 4 extend to 2 position of jackshaft, and vertical transmission becomes
Fast case system further includes thrust ball bearing I 10, and thrust ball bearing I 10 includes bearing top race I 11, bearing base circle I 12, keeps
Frame I, multiple balls I 13, bearing top race I 11 are sleeved on jackshaft 2, the fixed company of bearing top race I 11 and 4 lower surface of shift fork
It connects, bearing base circle I 12 is sleeved on jackshaft 2, and bearing base circle I 12 is fixedly connected with II 6 upper surface of countershaft-gear, is pressed
Multiple balls I 13 that gap is arranged circumferentially about are movably arranged on retainer I, and I 13 activity of ball is installed in bearing top race I 11
Between bearing base circle I 12.Above structure, special construction for vertical transfer gear box system and the specific question faced
And it proposes.Because drive shaft, jackshaft, yoke bar are arranged vertically in vertical transfer gear box system, in this way, yoke bar
Shift fork and jackshaft on Gear Contact when, not only phase mutual friction, but also up and down direction stress, in this way, leading to gear and dialling
Serious wear is pitched, and replaces and not only increases cost, but also is fairly cumbersome, influences equipment use.Therefore, the present invention is directed to existing knot
The defect of structure carries out local improvement, thrust ball bearing I 10 is arranged, and by I 11 He of bearing top race of thrust ball bearing I 10
Bearing base circle I 12 is connected from different components respectively, in this way, when yoke bar drives shift fork movement, when shift fork and jackshaft tooth
When taking turns II 6 contact, since multiple balls I 13, shift fork and jackshaft being arranged between bearing top race I 11 and bearing base circle I 12
The contact of gear II 6 is changed to rolling friction from sliding friction, so that the frictional force between shift fork and gear be effectively reduced, reduces and becomes
The frictional dissipation of fast case shift fork and gear during frequent movement reduces maintenance cycle.Vertical transmission of the present invention becomes
Fast case system, structure is simple, can change the way of contact of shift fork and gear, to be effectively reduced between shift fork and balladeur train
Frictional force substantially reduces parts depreciation, improves shift fork and shifting slide gear service life, reduces part frequency of maintenance, improves production
Efficiency.
The vertical transfer gear box system further includes thrust ball bearing II 14, and thrust ball bearing I 14 includes on bearing
Seat ring II 15, bearing base circle II 16, retainer II, multiple balls II 17, bearing top race II 15 are sleeved on jackshaft 2,
Bearing top race II 15 is fixedly connected with 18 lower surface of adjusting pad, and bearing base circle II 16 is sleeved on jackshaft 2, bearing base
It encloses II 16 to be fixedly connected with 9 upper surface of shift fork, is movably arranged on retainer II by multiple balls II 17 that gap is arranged circumferentially about
On, multiple II 17 activities of ball are installed between bearing top race II 15 and bearing base circle II 16, in 18 top of adjusting pad
Between also set up circlip for shaft 19 on axis 2.Above structure can adjust thrust ball axis by adjusting the thickness of adjusting pad 18
The bearing clearance of I 10 Yu thrust ball bearing II 14 is held, circlip for shaft 19 is finally installed, thrust ball bearing I 10 is realized and pushes away
The axial restraint of power ball bearing II 14 positions.
The countershaft-gear I 5 of the vertical transfer gear box system and countershaft-gear II 6 is disposed as and jackshaft
2 vertically arranged structures, axle shaft gear I 7 and axle shaft gear II 8 are disposed as and the vertically arranged structure of drive shaft 3.On
Structure is stated, countershaft-gear I 5, countershaft-gear II 6, axle shaft gear I 7, axle shaft gear II 8 are horizontally disposed, in this way,
Shift fork can act on II 6 upper surface location of countershaft-gear when moving up and down.And only in this way structure arrangement, just it is necessary to
It using thrust ball bearing of the invention, and can effectively change friction mode, reduce friction damage.Therefore, this is based on spy
Determine the improvement of scheme.
When the yoke bar 4 of the vertical transfer gear box system drives shift fork 9 to move up and down, shift fork 9 is configured to
Countershaft-gear I 5 and axle shaft gear I 7 is driven to engage and separating the structure switched between two states；The yoke bar
4 drive shift forks 9 are when moving up and down, shift fork 9 be configured to drive countershaft-gear II 6 and axle shaft gear II 8 in engagement and
The structure switched between separation two states.Above structure, operator can be controlled on yoke bar by the fluctuation of gear lever
Lower movement drives shift fork effect, realizes the switching of different stalls.
Countershaft-gear III 20 and countershaft-gear IV 21 are also set up on the jackshaft 2, and drive is also set up in drive shaft 3
Moving axis gear III 22 and axle shaft gear IV 23.The countershaft-gear III 20 and jackshaft of the vertical transfer gear box system
Gear IV 21 be disposed as with the vertically arranged structure of jackshaft 2, axle shaft gear III 22 and axle shaft gear IV 23 are respectively provided with
For with the vertically arranged structure of drive shaft 3.The yoke bar 4 of the vertical transfer gear box system drives shift fork 9 to move up and down
When, shift fork 9 is configured to that countershaft-gear III 20 and axle shaft gear III 22 is driven to engage and separating between two states
The structure of switching.Above structure is moved up and down by yoke bar and drives shift fork effect, realizes the switching of different stalls.
Vertical transfer gear box system of the present invention, special construction for vertical transfer gear box system and faces
Specific question and propose.Because drive shaft, jackshaft, yoke bar are arranged vertically in vertical transfer gear box system, this
Sample, when Gear Contact on the shift fork and jackshaft of yoke bar, not only phase mutual friction, but also up and down direction stress, in this way, causing
Gear and shift fork serious wear, and replace and not only increase cost, but also is fairly cumbersome, influence equipment use.Therefore, needle of the present invention
To the defect of existing structure, local improvement is carried out, thrust ball bearing I is set, and by the bearing top race I of thrust ball bearing I
It is connected respectively from different components with bearing base circle I, in this way, when yoke bar drives shift fork movement, when shift fork and jackshaft tooth
When II contact of wheel, since multiple balls I, shift fork and countershaft-gear II being arranged between bearing top race I and bearing base circle I
Contact is changed to rolling friction from sliding friction, so that the frictional force between shift fork and gear be effectively reduced, use reliability is high, at
This is low, reduces the frictional dissipation of gearbox shift fork and gear during frequent movement, reduces maintenance cycle.It is of the present invention
Vertical transfer gear box system, structure is simple, can change the way of contact of shift fork and gear, so that shift fork and cunning be effectively reduced
Frictional force between moving gear substantially reduces parts depreciation, improves shift fork and shifting slide gear service life, reduces part maintenance frequency
Rate improves production efficiency.
Above in conjunction with attached drawing, an exemplary description of the invention, it is clear that concrete implementation of the present invention is not by above-mentioned
The limitation of mode, as long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved by this
The conception and technical scheme of invention directly apply to other occasions, are within the scope of the invention.
Claims (7)
1. a kind of vertical transfer gear box system, it is characterised in that: the vertical transfer gear box system includes system casing
(1), jackshaft (2), drive shaft (3), yoke bar (4), jackshaft (2) and drive shaft (3), shift fork are installed in system casing (1)
Bar (4) is disposed as vertically arranged structure, and countershaft-gear I (5) and countershaft-gear II (6) is arranged on jackshaft (2), drives
Axle shaft gear I (7) are set on moving axis (3) and axle shaft gear II (8), the shift fork (9) of yoke bar (4) extend to jackshaft
(2) position, vertical transfer gear box system further include thrust ball bearing I (10), and thrust ball bearing I (10) includes bearing top race
I (11), bearing base circle I (12), retainer I, multiple balls I (13), bearing top race I (11) are sleeved on jackshaft (2),
Bearing top race I (11) is fixedly connected with shift fork (4) lower surface, and bearing base circle I (12) is sleeved on jackshaft (2), bearing
Bottom race I (12) is fixedly connected with countershaft-gear II (6) upper surface, and the multiple balls I (13) being arranged circumferentially about by gap are living
Dynamic to be mounted on retainer I, ball I (13) activity is installed between bearing top race I (11) and bearing base circle I (12).
2. vertical transfer gear box system according to claim 1, it is characterised in that: the vertical transfer gear box system
System further includes thrust ball bearing II (14), and thrust ball bearing I (14) includes bearing top race II (15), bearing base circle II
(16), retainer II, multiple balls II (17), bearing top race II (15) are sleeved on jackshaft (2), bearing top race II
(15) it is fixedly connected with adjusting pad (18) lower surface, bearing base circle II (16) is sleeved on jackshaft (2), bearing base circle II
(16) it is fixedly connected with shift fork (9) upper surface, is movably arranged on retainer by multiple balls II (17) that gap is arranged circumferentially about
On II, multiple ball II (17) activities are installed between bearing top race II (15) and bearing base circle II (16), adjusting pad
(18) circlip for shaft (19) are also set up on the jackshaft (2) above.
3. vertical transfer gear box system according to claim 1 or 2, it is characterised in that: the vertical transmission gear shift
The countershaft-gear I (5) and countershaft-gear II (6) of case system are disposed as and jackshaft (2) vertically arranged structure, driving
Shaft gear I (7) and axle shaft gear II (8) are disposed as and drive shaft (3) vertically arranged structure.
4. vertical transfer gear box system according to claim 1 or 2, it is characterised in that: the vertical transmission gear shift
When the yoke bar (4) of case system drives shift fork (9) to move up and down, shift fork (9) be configured to drive countershaft-gear I (5) and
Axle shaft gear I (7) is engaging and is separating the structure switched between two states；The yoke bar (4) drives on shift fork (9)
When lower mobile, shift fork (9) is configured to that countershaft-gear II (6) and axle shaft gear II (8) is driven to engage and separating two
The structure switched between kind state.
5. vertical transfer gear box system according to claim 1, it is characterised in that: also set on the jackshaft (2)
Countershaft-gear III (20) and countershaft-gear IV (21) are set, axle shaft gear III (22) and driving are also set up in drive shaft (3)
Shaft gear IV (23).
6. vertical transfer gear box system according to claim 5, it is characterised in that: the vertical transfer gear box system
The countershaft-gear III (20) and countershaft-gear IV (21) of system are disposed as and jackshaft (2) vertically arranged structure, driving
Shaft gear III (22) and axle shaft gear IV (23) are disposed as and drive shaft (3) vertically arranged structure.
7. vertical transfer gear box system according to claim 5 or 6, it is characterised in that: the vertical transmission gear shift
When the yoke bar (4) of case system drives shift fork (9) to move up and down, shift fork (9) is configured to drive countershaft-gear III (20)
And axle shaft gear III (22) is engaging and is separating the structure switched between two states.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910549229.3A CN110185754A (en) | 2019-06-24 | 2019-06-24 | A kind of vertical transfer gear box system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910549229.3A CN110185754A (en) | 2019-06-24 | 2019-06-24 | A kind of vertical transfer gear box system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110185754A true CN110185754A (en) | 2019-08-30 |
Family
ID=67723035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910549229.3A Pending CN110185754A (en) | 2019-06-24 | 2019-06-24 | A kind of vertical transfer gear box system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110185754A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4104928A (en) * | 1976-09-20 | 1978-08-08 | Eaton Corporation | Transmission |
| CN102513864A (en) * | 2011-12-16 | 2012-06-27 | 芜湖恒升重型机床股份有限公司 | Worktable gearbox for vertical lathe |
| CN102528520A (en) * | 2011-12-23 | 2012-07-04 | 上海三一精机有限公司 | Shifting fork double-acting gear box structure |
| CN103551601A (en) * | 2013-11-04 | 2014-02-05 | 大连飞达重型机床制造有限公司 | Hydraulic two-gear numerical control stepless gearbox |
| CN103741916A (en) * | 2013-12-24 | 2014-04-23 | 同济大学 | Drive mechanism for movable curtain and utilization method of drive mechanism |
| CN204403293U (en) * | 2014-12-19 | 2015-06-17 | 山东永华机械有限公司 | The two shift fork machine tool chief axis two of single splined shaft keeps off gearbox |
| CN207378071U (en) * | 2017-10-20 | 2018-05-18 | 天津拖拉机制造有限公司 | Gear box of tractor advances, drive in the wrong direction retaining device |
-
2019
- 2019-06-24 CN CN201910549229.3A patent/CN110185754A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4104928A (en) * | 1976-09-20 | 1978-08-08 | Eaton Corporation | Transmission |
| CN102513864A (en) * | 2011-12-16 | 2012-06-27 | 芜湖恒升重型机床股份有限公司 | Worktable gearbox for vertical lathe |
| CN102528520A (en) * | 2011-12-23 | 2012-07-04 | 上海三一精机有限公司 | Shifting fork double-acting gear box structure |
| CN103551601A (en) * | 2013-11-04 | 2014-02-05 | 大连飞达重型机床制造有限公司 | Hydraulic two-gear numerical control stepless gearbox |
| CN103741916A (en) * | 2013-12-24 | 2014-04-23 | 同济大学 | Drive mechanism for movable curtain and utilization method of drive mechanism |
| CN204403293U (en) * | 2014-12-19 | 2015-06-17 | 山东永华机械有限公司 | The two shift fork machine tool chief axis two of single splined shaft keeps off gearbox |
| CN207378071U (en) * | 2017-10-20 | 2018-05-18 | 天津拖拉机制造有限公司 | Gear box of tractor advances, drive in the wrong direction retaining device |
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