CN213088736U - Pneumatic shifting fork device of excavator transfer case - Google Patents
Pneumatic shifting fork device of excavator transfer case Download PDFInfo
- Publication number
- CN213088736U CN213088736U CN202022008302.7U CN202022008302U CN213088736U CN 213088736 U CN213088736 U CN 213088736U CN 202022008302 U CN202022008302 U CN 202022008302U CN 213088736 U CN213088736 U CN 213088736U
- Authority
- CN
- China
- Prior art keywords
- piston
- transfer case
- shifting fork
- cylinder body
- pneumatic
- 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.)
- Active
Links
Images
Landscapes
- Gear-Shifting Mechanisms (AREA)
Abstract
The utility model belongs to the technical field of excavator transfer case, especially, relate to a pneumatic shift fork device of excavator transfer case, including cylinder body, piston, closing cap, declutch shift shaft, shift fork, first gas pipe joint and second gas pipe joint, the cylinder body is fixed to be set up on the box of transfer case, run through in proper order in the cylinder body has piston chamber and control chamber, the piston sets up in the piston chamber, one end of declutch shift shaft passes control chamber and piston chamber in proper order to and with the piston rigid coupling, the shift fork is fixed to be set up at the other end of declutch shift shaft, the shift fork is located the inboard of box, the cylinder body is located the outside of box; the sealing cover is fixedly connected with the cylinder body and used for sealing the piston cavity, and the first air pipe joint and the second air pipe joint are respectively communicated with the piston cavities on two sides of the piston; the cylinder body is provided with a control port communicated with the control cavity, an elastic piece is arranged in the control port, the shifting fork shaft is sequentially provided with a low-gear groove and a high-gear groove along the axial direction of the shifting fork shaft, a steel ball is arranged between the elastic piece and the shifting fork shaft, and the steel ball can be clamped into the low-gear groove or the high-gear groove.
Description
Technical Field
The utility model belongs to the technical field of the excavator transfer case, especially, relate to a pneumatic shift fork device of excavator transfer case.
Background
Along with the rapid development of economy in China, the small wheel excavator has larger and larger market share due to the flexible operation advantage, the requirement on the small wheel excavator is higher and higher, and in order to highlight the superiority of products of a company, the company also invests corresponding technical transformation on the small excavator; the general small-sized excavator drives to walk sequentially through a diesel engine, a coupling, a hydraulic pump (converting mechanical energy into hydraulic energy), a distributing valve, a central rotary joint, a walking motor (converting hydraulic energy into mechanical energy), a reduction gearbox (gearbox), a transmission shaft, a front axle and a rear axle and a driving wheel; the reduction gearbox of the existing small-sized wheel type excavator has no gear change, the high-speed gear and the low-speed gear cannot be rapidly switched, the walking speed is controlled by the hydraulic flow output by the walking motor, but the torque output by some special operation places and places with large gradient is required to be larger, and the walking speed and the climbing speed can be influenced.
SUMMERY OF THE UTILITY MODEL
The reducing gear box of the small-size wheeled excavator who exists for solving prior art does not have the gear change, can't realize the problem of high-speed gear and the quick conversion of low-speed gear, the utility model provides a pneumatic shift fork device of excavator transfer case, the purpose that reaches quick control functioning speed through the high low-speed of atmospheric pressure quickly separating transfer case satisfies special operation place, like the requirement of the quick speed reduction in heavy grade place.
In order to solve the technical problem, the technical scheme adopted by the utility model is as follows, a pneumatic shifting fork device of the excavator transfer case comprises a cylinder body, a piston, a sealing cover, a shifting fork shaft, a shifting fork, a first air pipe joint and a second air pipe joint, wherein the cylinder body is fixedly arranged on the transfer case body, a piston cavity and a control cavity are sequentially penetrated in the cylinder body, the piston is arranged in the piston cavity, one end of the shifting fork shaft sequentially penetrates through the control cavity and the piston cavity and is fixedly connected with the piston, the shifting fork is fixedly arranged at the other end of the shifting fork shaft, the shifting fork is positioned at the inner side of the transfer case body, and the cylinder body is positioned at the outer side of the transfer case body;
the sealing cover is fixedly connected with the cylinder body and used for sealing the piston cavity, and the first air pipe joint and the second air pipe joint are respectively communicated with the piston cavities on the two sides of the piston; the pneumatic shifting fork device is characterized in that a control port communicated with the control cavity is formed in the cylinder body, an elastic piece is arranged in the control port, a low gear groove and a high gear groove are sequentially formed in the shifting fork shaft along the axial direction of the shifting fork shaft, a steel ball is arranged between the elastic piece and the shifting fork shaft, when the steel ball is clamped into the low gear groove, the pneumatic shifting fork device is in a low gear, and when the steel ball is clamped into the high gear groove, the pneumatic shifting fork device is in a high gear.
Preferably, a first sealing element is arranged between the piston and the piston cavity, a second sealing element is arranged between the piston and the piston rod, and a third sealing element is arranged between the piston rod and the control cavity. The sealing performance of the piston cavity is guaranteed, and the reliability and the stability of the pneumatic shifting fork device are improved.
Preferably, the first sealing element, the second sealing element and the third sealing element are sealing rings; the number of the sealing rings of the first sealing element is two, and the two sealing rings are sequentially distributed along the axial direction of the piston; the number of the sealing rings of the third sealing element is two, and the two sealing rings are sequentially distributed along the axial direction of the piston rod. The sealing performance of the piston cavity is further guaranteed, and the reliability and the stability of the pneumatic shifting fork device are improved.
Preferably, the sealing cover is provided with a first flange, and the first flange is attached to the inner wall of the piston cavity; and a sealant is coated between the sealing cover and the cylinder body. The close fit of the sealing cover and the cylinder body is ensured, and the sealing performance of the piston cavity is ensured.
Preferably, the shifting fork shaft is provided with an oil groove along the axial direction of the shifting fork shaft, and the low gear groove and the high gear groove are both communicated with the oil groove. The shifting fork shaft is lubricated, and the structure is reasonable and reliable.
Further, the control port is in threaded connection with an adjusting bolt, and the tail end of the adjusting bolt is in contact with the elastic piece. The tension force of the elastic piece cannot loosen after adjustment, and the matching reliability of the steel ball, the low-gear groove and the high-gear groove is improved.
Furthermore, the shifting fork is fixedly arranged at the other end of the shifting fork shaft through an elastic cylindrical pin. Convenient assembly and firm installation.
Furthermore, the shifting fork is matched and fixedly connected with a gear sleeve of the transfer case.
Further, all run through the gas pocket on first trachea joint and the second trachea joint, first trachea joint is fixed to be set up on the closing cap, the second trachea joint is fixed to be set up on the cylinder body, the tip of gas pocket is the toper of externally expanding. Facilitating gas injection.
Has the advantages that: the utility model discloses a pneumatic shift fork device of excavator transfer case, when first gas pipe joint acted on when admitting air, second gas pipe joint then used as giving vent to anger, and the gas in the piston cavity promotes the piston and removes this moment, and the piston drives declutch shift shaft and shift fork removal simultaneously, and the shift fork drives the meshing cover in the transfer case and removes this moment, and the steel ball card is gone into low gear groove, and the steel ball receives spring tension locking low gear, and this pneumatic shift fork device is in the low gear; when the second air pipe joint acts on air inlet, the first air pipe joint is used for air outlet, at the same time, the air in the piston cavity pushes the piston to move, meanwhile, the piston drives the shifting fork shaft and the shifting fork to move, at the same time, the shifting fork drives the meshing sleeve in the transfer case to move until the steel ball is clamped into the high-gear groove, the steel ball is locked at a high-speed gear under the tension of the spring, and the pneumatic shifting fork device is at a high-speed gear; this pneumatic shift fork device passes through the meshing cover quickly separating in the atmospheric pressure drives the transfer case, makes the gear pair in the transfer case realize high-speed gear and the quick conversion of low-speed gear, reaches the operation requirement, and this pneumatic shift fork device's simple structure is reliable, and high-speed gear and low-speed gear switch fast and stable, the simple operation, the cost is lower.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the internal structure of the pneumatic fork-shifting device of the excavator transfer case of the present invention at a low gear;
FIG. 2 is a schematic diagram of the internal structure of the pneumatic fork-shifting device of the excavator transfer case of the present invention when the pneumatic fork-shifting device is located at a high-speed gear;
FIG. 3 is a schematic side view of the cylinder of the pneumatic fork shifter assembly of the excavator transfer case of the present invention;
FIG. 4 is a schematic cross-sectional view taken along the line A-A in FIG. 3;
FIG. 5 is a schematic front view of a fork shaft of the pneumatic fork shifter assembly of the excavator transfer case of the present invention;
FIG. 6 is a schematic side view of the fork of the pneumatic fork shifter assembly of the excavator transfer case of the present invention;
FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 6;
the direction of the arrows in fig. 1 and 2 indicate the direction of flow of the gas;
in the figure: 1. the gas cylinder comprises a cylinder body, 1-1 parts, a piston cavity, 1-2 parts, a control cavity, 1-3 parts, a control port, 1-4 parts, a second flange, 2 parts, a piston, 3 parts, a sealing cover, 3-1 parts, a first flange, 4 parts, a shifting fork shaft, 4-1 parts, a low gear groove, 4-2 parts, a high gear groove, 4-3 parts, an oil groove, 5 parts, a shifting fork, 6 parts, a first gas pipe joint, 7 parts, a second gas pipe joint, 7-1 parts, a gas hole, 8 parts, a spring, 9 parts, a steel ball, 10 parts, a sealing ring, 11 parts, an adjusting bolt, 12 parts, an elastic cylindrical pin, 13 parts, a locking nut, 14 parts, a screw, 15 parts.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Example 1
As shown in fig. 1 to 7, a pneumatic shifting fork device of a transfer case of an excavator comprises a cylinder body 1, a piston 2, a sealing cover 3, a shifting fork shaft 4, a shifting fork 5, a first air pipe joint 6 and a second air pipe joint 7, wherein the cylinder body 1 is fixedly arranged on a box body 15 of the transfer case, specifically, the cylinder body 1 is fixedly connected with the box body 15 of the transfer case through a screw 14, in order to improve the installation reliability of the cylinder body 1, a mounting hole is arranged on the box body 15, a second flange 1-4 matched with the mounting hole is outwards extended on the cylinder body 1, a piston cavity 1-1 and a control cavity 1-2 are sequentially penetrated in the cylinder body 1, the piston 2 is arranged in the piston cavity 1-1, one end of the shifting fork shaft 4 sequentially penetrates through the control cavity 1-2 and the piston cavity 1-1 and is fixedly connected with the piston 2, specifically, a locking nut 13 is in threaded connection with the end part of the shifting fork shaft 4, the piston 2 is positioned between a locking nut 13 and an axial step of the shifting fork shaft 4, the shifting fork 5 is fixedly arranged at the other end of the shifting fork shaft 4, specifically, the shifting fork 5 is fixedly arranged at the other end of the shifting fork shaft 4 through an elastic cylindrical pin 12, the shifting fork 5 is positioned at the inner side of the box body 15, the shifting fork 5 is matched and fixedly connected with a gear sleeve in the transfer case, and the cylinder body 1 is positioned at the outer side of the box body 15;
as shown in fig. 1 to 4, the sealing cover 3 is fixedly connected with the cylinder 1, specifically, the sealing cover 3 is fixedly connected with the cylinder 1 through a screw 14, the sealing cover 3 is used for sealing the piston cavity 1-1, the first air pipe joint 6 and the second air pipe joint 7 are respectively communicated with the piston cavity 1-1 on both sides of the piston 2, the air holes 7-1 penetrate through the first air pipe joint 6 and the second air pipe joint 7, the first air pipe joint 6 is fixedly arranged on the sealing cover 3, the second air pipe joint 7 is fixedly arranged on the cylinder 1, and for the convenience of gas injection, the end part of the air hole 7-1 is in a conical shape expanding outwards;
as shown in fig. 1-5, a control port 1-3 communicated with a control cavity 1-2 is formed in a cylinder body 1, an elastic member is arranged in the control port 1-3, the elastic member is a spring 8, a low gear groove 4-1 and a high gear groove 4-2 are sequentially formed in a declutch shift shaft 4 along the axial direction of the declutch shift shaft, the distance between the low gear groove 4-1 and the high gear groove 4-2 is equidistant to the center distance of a gear pair for high and low speed regulation in a transfer case, in order to lubricate the declutch shift shaft 4, an oil groove 4-3 is formed in the declutch shift shaft 4 along the axial direction of the declutch shift shaft 4, the low gear groove 4-1 and the high gear groove 4-2 are both communicated with the oil groove 4-3, the structure is reasonable and reliable, a steel ball 9 is arranged between the elastic member and the declutch shift shaft 4, when the steel ball 9 is clamped into the low gear groove 4, the steel ball 9 is locked at the low gear by the tension of the spring 8; when the steel ball 9 is clamped into the high-gear groove 4-2, the pneumatic shifting fork device is in a high-speed gear, and the steel ball 9 is locked by the tension of the spring 8; the adjusting bolt 11 is connected to the position of the control port 1-3 through threads, the tail end of the adjusting bolt 11 is in contact with the elastic piece, the tension force of the elastic piece cannot loosen after adjustment, and the reliability of matching of the steel ball 9 with the low-gear groove 4-1 and the high-gear groove 4-2 is improved.
As shown in fig. 1 and 2, in order to ensure the sealing performance in the cylinder 1 and improve the reliability and stability of the pneumatic fork device, a first sealing element is arranged between the piston 2 and the piston cavity 1-1, a second sealing element is arranged between the piston 2 and the rod of the piston 2, and a third sealing element is arranged between the rod of the piston 2 and the control cavity 1-2; the first sealing element, the second sealing element and the third sealing element are sealing rings 10; the number of the sealing rings 10 of the first sealing element is two, and the two sealing rings 10 are sequentially distributed along the axial direction of the piston 2; the number of the sealing rings 10 of the third sealing element is two, and the two sealing rings 10 are sequentially distributed along the axial direction of the piston 2 rod; the sealing cover 3 is provided with a first flange 3-1, the first flange 3-1 is attached to the inner wall of the piston cavity 1-1, the sealing cover 3 is guaranteed to be tightly matched with the cylinder body 1, and a sealing glue is coated between the sealing cover 3 and the cylinder body 1.
The working principle is as follows:
as shown in fig. 1, when the first air pipe joint 6 acts on inlet air, the second air pipe joint 7 is used for outlet air, at the moment, air in a piston cavity 1-1 pushes a piston 2 to move, meanwhile, the piston 2 drives a shifting fork shaft 4 and a shifting fork 5 to move, at the moment, the shifting fork 5 drives a meshing sleeve in a transfer case to move until a steel ball 9 is clamped into a low-gear groove 4-1, the steel ball 9 locks a low-gear by the tension of a spring 8, and the pneumatic shifting fork device is in a low-gear position; as shown in fig. 2, when the second air pipe joint 7 acts on inlet air, the first air pipe joint 6 is used for outlet air, at the moment, air in the piston cavity 1-1 pushes the piston 2 to move, meanwhile, the piston 2 drives the shifting fork shaft 4 and the shifting fork 5 to move, at the moment, the shifting fork 5 drives the meshing sleeve in the transfer case to move until the steel ball 9 is clamped into the high gear groove 4-2, the steel ball 9 is locked at a high gear by the tension of the spring 8, and the pneumatic shifting fork device is in a high gear; the pneumatic shifting fork device drives the meshing sleeve in the transfer case to be quickly separated through air pressure, so that the gear pair in the transfer case is converted to meet the operation requirement.
Claims (9)
1. The utility model provides an excavator transfer case's pneumatic shift fork device which characterized in that: the transfer case comprises a cylinder body (1), a piston (2), a sealing cover (3), a shifting fork shaft (4), a shifting fork (5), a first air pipe joint (6) and a second air pipe joint (7), wherein the cylinder body (1) is fixedly arranged on a case body (15) of the transfer case, a piston cavity (1-1) and a control cavity (1-2) sequentially penetrate through the cylinder body (1), the piston (2) is arranged in the piston cavity (1-1), one end of the shifting fork shaft (4) sequentially penetrates through the control cavity (1-2) and the piston cavity (1-1) and is fixedly connected with the piston (2), the shifting fork (5) is fixedly arranged at the other end of the shifting fork shaft (4), the shifting fork (5) is positioned on the inner side of the case body (15), and the cylinder body (1) is positioned on the outer side of the case body (15);
the sealing cover (3) is fixedly connected with the cylinder body (1), the sealing cover (3) is used for sealing the piston cavity (1-1), and the first air pipe joint (6) and the second air pipe joint (7) are respectively communicated with the piston cavity (1-1) on two sides of the piston (2); offer control mouth (1-3) with control chamber (1-2) intercommunication on cylinder body (1), be provided with the elastic component in control mouth (1-3), low-gear groove (4-1) and high-gear groove (4-2) have been seted up in proper order along its axial on declutch shift shaft (4), be provided with steel ball (9) between elastic component and declutch shift shaft (4), when steel ball (9) card is gone into low-gear groove (4-1), this pneumatic shift fork device is in the low gear, when steel ball (9) card is gone into high-gear groove (4-2), this pneumatic shift fork device is in the high gear.
2. The pneumatic fork shifter assembly of an excavator transfer case of claim 1, wherein: a first sealing element is arranged between the piston (2) and the piston cavity (1-1), a second sealing element is arranged between the piston (2) and the piston rod (2), and a third sealing element is arranged between the piston rod (2) and the control cavity (1-2).
3. The pneumatic fork shifter assembly of an excavator transfer case of claim 2, wherein: the first sealing element, the second sealing element and the third sealing element are all sealing rings (10); the number of the sealing rings (10) of the first sealing element is two, and the two sealing rings (10) are sequentially distributed along the axial direction of the piston (2); the number of the sealing rings (10) of the third sealing element is two, and the two sealing rings (10) are sequentially distributed along the axial direction of the piston (2) rod.
4. The pneumatic fork shifter assembly of an excavator transfer case of claim 1, 2 or 3, wherein: the sealing cover (3) is provided with a first flange (3-1), and the first flange (3-1) is attached to the inner wall of the piston cavity (1-1); and a sealant is coated between the sealing cover (3) and the cylinder body (1).
5. The pneumatic fork shifter assembly of an excavator transfer case of claim 1, wherein: an oil groove (4-3) is formed in the shifting fork shaft (4) along the axial direction of the shifting fork shaft, and the low gear groove (4-1) and the high gear groove (4-2) are communicated with the oil groove (4-3).
6. The pneumatic fork shifter assembly of an excavator transfer case of claim 1, wherein: the control port (1-3) is in threaded connection with an adjusting bolt (11), and the tail end of the adjusting bolt (11) is in contact with the elastic piece.
7. The pneumatic fork shifter assembly of an excavator transfer case of claim 1, wherein: the shifting fork (5) is fixedly arranged at the other end of the shifting fork shaft (4) through an elastic cylindrical pin (12).
8. The pneumatic fork shifter assembly of an excavator transfer case of claim 1 or 7, wherein: the shifting fork (5) is matched and fixedly connected with the gear sleeve of the transfer case.
9. The pneumatic fork shifter assembly of an excavator transfer case of claim 1, wherein: all run through gas pocket (7-1) on first gas pipe joint (6) and second gas pipe joint (7), first gas pipe joint (6) are fixed to be set up on closing cap (3), second gas pipe joint (7) are fixed to be set up on cylinder body (1), the tip of gas pocket (7-1) is the toper of externally expanding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022008302.7U CN213088736U (en) | 2020-09-15 | 2020-09-15 | Pneumatic shifting fork device of excavator transfer case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022008302.7U CN213088736U (en) | 2020-09-15 | 2020-09-15 | Pneumatic shifting fork device of excavator transfer case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213088736U true CN213088736U (en) | 2021-04-30 |
Family
ID=75635611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022008302.7U Active CN213088736U (en) | 2020-09-15 | 2020-09-15 | Pneumatic shifting fork device of excavator transfer case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213088736U (en) |
-
2020
- 2020-09-15 CN CN202022008302.7U patent/CN213088736U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201472161U (en) | Automotive transfer case with locking differential mechanism | |
| CN208842224U (en) | A kind of penetrating bridge main speed reducer assembly | |
| CN106015504A (en) | Compound type axial flow type hydraulic torque converter and starter | |
| CN213088736U (en) | Pneumatic shifting fork device of excavator transfer case | |
| CN106740776A (en) | A kind of row parking braking combined supercharging device | |
| CN213088658U (en) | Transfer case of wheeled excavator | |
| CN205154879U (en) | Many oil ducts of tractor transmission shaft structure | |
| CN204942333U (en) | Pitch fast integrated type wet type Parking Brake | |
| CN210396820U (en) | Turbocharger thrust structure and turbocharger thereof | |
| CN210799912U (en) | Novel four-wheel drive gearbox | |
| WO2016112800A1 (en) | Composite and comprehensive hydraulic torque converter and continuously variable transmission | |
| CN201761366U (en) | Vacuum control air bag of power takeoff | |
| CN207673731U (en) | Middle transition telescopic shaft crown gear coupling | |
| CN208203849U (en) | A kind of clutch power-assisted master cylinder | |
| CN201650449U (en) | Diesel engine | |
| CN201808456U (en) | Intermediate power output and rear power output device of tractor | |
| CN204567304U (en) | A kind of power takeoff being convenient to install | |
| CN104482161A (en) | Compound hydraulic special-shaped coupler and starter | |
| CN104653744B (en) | A kind of composite type hydraulic torque converter with external overflow valve | |
| CN210920034U (en) | Output shaft structure of side power takeoff | |
| CN204477114U (en) | Automobile gearbox clutch | |
| CN214465863U (en) | Power takeoff of integral type aluminium box structure | |
| CN215171933U (en) | Planetary gear structure for concentric shaft variable speed operation | |
| CN218598677U (en) | High-performance clutch automatic separation device | |
| CN203604570U (en) | Novel hydraulic drive transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: JIANGSU ZHENJI MACHINERY MANUFACTURING Co.,Ltd. Assignor: WORLD HEAVY INDUSTRY (CHINA) Co.,Ltd. Contract record no.: X2023320000081 Denomination of utility model: A pneumatic fork device for the transfer case of excavator Granted publication date: 20210430 License type: Common License Record date: 20230206 |