CN217197779U - Tractor front wheel acceleration rate turns to device and a steering system - Google Patents
Tractor front wheel acceleration rate turns to device and a steering system Download PDFInfo
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- CN217197779U CN217197779U CN202220969507.8U CN202220969507U CN217197779U CN 217197779 U CN217197779 U CN 217197779U CN 202220969507 U CN202220969507 U CN 202220969507U CN 217197779 U CN217197779 U CN 217197779U
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Abstract
The utility model relates to a tractor front wheel acceleration rate steering gear and a steering system, the steering gear comprises a rear axle shell, an input shaft, an idler shaft and a transfer case output shaft, the input shaft, the idler shaft and the transfer case output shaft are parallel to each other and are respectively connected in the rear axle shell in a rotating way; the input shaft is in splined connection with a driving gear of a transfer case, a shaft of the idler is respectively in splined connection with a non-double-speed idler and a double-speed idler, an output shaft of the transfer case is respectively and movably connected with a non-double-speed driven gear and a double-speed driven gear, the driving gear of the transfer case is meshed with the non-double-speed idler, the non-double-speed idler is meshed with the non-double-speed driven gear, and the double-speed idler is meshed with the double-speed driven gear; the transfer case is provided with a first clutch and a second clutch on an output shaft, the first clutch is correspondingly matched with the non-double-speed driven gear and drives the output shaft of the transfer case to enter a four-drive mode or a two-drive mode, and the second clutch is correspondingly matched with the double-speed driven gear and drives the output shaft of the transfer case to enter the double-speed mode or the two-drive mode.
Description
Technical Field
The utility model relates to a tractor correlation technique field, concretely relates to tractor front wheel acceleration rate turns to device and a steering system.
Background
At present, domestic tractors are driven by two-wheel or four-wheel, the front wheels of the two-wheel tractor are not restricted by driving force, and the steering is more flexible, but the two-wheel tractor is not suitable for the working condition requiring large traction force; the four-wheel drive tractor has the advantages of large traction force, strong climbing capability and good engine braking effect, but because the front wheel drive is mandatory, the rotating speed of the front wheel cannot be accelerated along with the increase of the rotating angle, but can generate resistance, so that the conditions of the increase of the turning radius, the increase of the turning time, the damage of the turning trace to the land and the like can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve one or several kinds among the above-mentioned technical problem, provide a tractor front wheel acceleration rate turns to device and a steering system.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a front wheel speed-increasing steering device of a tractor comprises a rear axle shell, an input shaft, an idler shaft and a transfer case output shaft, wherein the input shaft, the idler shaft and the transfer case output shaft are parallel to each other and are respectively and rotatably connected in the rear axle shell; the input shaft is in splined connection with a transfer case driving gear, the idler shaft is respectively in splined connection with a non-double-speed idler and a double-speed idler, the transfer case output shaft is respectively in movable connection with a non-double-speed driven gear and a double-speed driven gear, the transfer case driving gear is meshed with the non-double-speed idler, the non-double-speed idler is meshed with the non-double-speed driven gear, and the double-speed idler is meshed with the double-speed driven gear; the transfer case is characterized in that a first clutch and a second clutch are arranged on the output shaft of the transfer case, the first clutch is correspondingly matched with the non-double-speed driven gear and drives the output shaft of the transfer case to enter a four-wheel drive mode or a two-wheel drive mode through contact or separation with the non-double-speed driven gear, and the second clutch is correspondingly matched with the double-speed driven gear and drives the output shaft of the transfer case to enter the double-speed mode or the two-wheel drive mode through contact or separation with the double-speed driven gear.
The utility model has the advantages that: the utility model discloses a turn to device, through two driving and four driving modes at the tractor outside provide another kind of doubly fast driving mode, when the tractor straight line goes normal operation, can be by driver oneself select two to drive or four-wheel drive, when needs turn to, tractor automatic switch to front wheel acceleration rate state, the front wheel speed increase realizes turning to fast, reduces to turn to the radius circle, alleviates rolling to the soil, improves the operating efficiency.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, an oil duct which is correspondingly communicated with the first clutch and the second clutch respectively is arranged on the transfer case output shaft, one end of the oil duct extends to the end face of one end of the transfer case output shaft, and an oil plug is arranged at one end of the oil duct.
The beneficial effect of adopting the further scheme is that: the oil duct is arranged on the output shaft of the transfer case, so that oil pressure driving of the two clutches is facilitated.
Further, the first clutch comprises a first shell, a first piston, a first friction plate closing piece and a first spring, the first shell is sleeved on the transfer case output shaft and is fixedly connected with the transfer case output shaft, a first annular structure is formed by extending the end surface of the non-double-speed driven gear, the first friction plate closing piece is sleeved on the first annular structure and is in spline fit with the first annular structure, the first piston is axially slidably assembled in the first shell and is in spline fit with the transfer case output shaft, and the first spring is sleeved on the transfer case output shaft and is respectively abutted to the first piston and a first retainer ring on the transfer case output shaft; the first piston is in friction fit with the first friction plate composite member and realizes clutch transmission between the non-double-speed driven gear and the transfer case output shaft.
The beneficial effect of adopting the further scheme is that: in the four-wheel drive mode, the first piston can be driven to axially move, so that the first piston is in contact with the first friction plate composite member and in friction fit with the first friction plate composite member, synchronous transmission between the output shaft of the transfer case and the non-double-speed driven gear is realized, and four-wheel drive power output of the output shaft of the transfer case is realized. In the two-drive mode, the first piston is not driven to move axially any more, and under the action of the first spring, the first piston and the first friction plate fitting part are disengaged from each other to realize the relative motion between the output shaft of the transfer case and the non-double-speed driven gear, and the output shaft of the transfer case does not output power any more, namely, the two-drive-force output mode is realized.
Further, a main oil duct and a first oil dividing duct are arranged on the transfer case output shaft, one end of the main oil duct extends to the end face of one end of the transfer case output shaft, one end of the first oil dividing duct is communicated with the main oil duct, and the other end of the first oil dividing duct is communicated with a first oil cavity between the first piston and the first shell.
The beneficial effect of adopting the further scheme is that: the first piston may be driven by hydraulic oil axially along the transfer case output shaft.
Furthermore, the second clutch comprises a second shell, a second piston, a second friction plate closing piece and a second spring, the second shell is sleeved on the output shaft of the transfer case and is fixedly connected with the output shaft of the transfer case, a second annular structure is formed by extending the end face of the speed-multiplying driven gear, the second friction plate closing piece is sleeved on the second annular structure and is in spline fit with the second annular structure, the second piston is assembled in the second shell in an axially sliding manner and is in spline fit with the output shaft of the transfer case, and the second spring is sleeved on the output shaft of the transfer case and is respectively abutted to the second piston and a second stop ring on the output shaft of the transfer case; the second piston is in friction fit with the second friction plate composite member and realizes clutch transmission between the speed-multiplying driven gear and the transfer case output shaft.
The beneficial effect of adopting the further scheme is that: in the speed-multiplying mode, the second piston can be driven to axially move, so that the second piston is in contact with the second friction plate composite member and in friction fit with the second friction plate composite member, synchronous transmission between the output shaft of the transfer case and the speed-multiplying driven gear is realized, and speed-multiplying power output of the output shaft of the transfer case is realized. In the two-drive mode, the second piston is not driven to move axially any more, and under the action of the second spring, the friction fit between the second piston and the second friction plate assembly is removed, so that the relative motion between the output shaft of the transfer case and the speed-multiplying driven gear is realized, the output shaft of the transfer case does not output power any more, and the two-drive-force output mode is realized.
Furthermore, a main oil duct and a second oil duct are arranged on the transfer case output shaft, one end of the main oil duct extends to the end face of one end of the transfer case output shaft, one end of the second oil duct is communicated with the main oil duct, and the other end of the second oil duct is communicated with a second oil cavity between a second piston and a second shell.
The beneficial effect of adopting the further scheme is that: the second piston may be driven by hydraulic oil to move axially along the transfer case output shaft.
Further, the transmission ratio between the non-double-speed idler gear and the non-double-speed driven gear is smaller than the transmission ratio between the double-speed idler gear and the double-speed driven gear.
The beneficial effect of adopting the further scheme is that: by designing different transmission ratios, different mode conversion between the four-wheel drive mode and the double-speed mode is realized.
The utility model provides a tractor front wheel acceleration rate a steering system, includes tractor front wheel acceleration rate turn to the device, still includes: the front axle rotation angle sensor is installed on a front axle and connected with the controller, and the rotation speed sensor is installed on a tractor chassis and connected with the controller.
The utility model has the advantages that: the utility model discloses a steering system can control different mode switch through the parameter that front axle corner sensor and speed sensor detected.
Further, the device also comprises a speed multiplying switch and a four-wheel drive switch, wherein the speed multiplying switch and the four-wheel drive switch are respectively connected with the controller.
The beneficial effect of adopting the further scheme is that: different mode control commands can be input through the related switches.
Drawings
FIG. 1 is a schematic view of the internal structure of the front wheel speed-increasing steering gear of the tractor of the present invention;
fig. 2 is a control schematic diagram of the tractor front wheel speed-increasing steering system of the utility model.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a rear axle housing;
2. an input shaft; 21. the transfer case drives the gear; 22. a thrust washer; 23. a spacer sleeve; 24. a tapered roller bearing;
3. an idler shaft; 31. a non-double speed idler; 32. a double speed idler; 33. a cylindrical roller bearing; 34. a deep groove ball bearing;
4. an output shaft of the transfer case; 40. a transfer case end cover; 41. a non-double speed driven gear; 42. a double speed driven gear; 43. a first annular structure; 44. a second annular structure; 45. a first retainer ring; 46. a second retainer ring; 47. a main oil gallery; 48. a second oil distribution passage; 49. an oil plug;
5. a first clutch; 51. a first housing; 52. a first piston; 53. a first friction plate assembly; 54. a first spring;
6. a second clutch; 61. a second housing; 62. a second piston; 63. a second friction plate assembly; 64. a second spring; 7. a seal ring; 8. a needle assembly.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1, the tractor front wheel speed-increasing steering device of the embodiment comprises a rear axle housing 1, an input shaft 2, an idler shaft 3 and a transfer case output shaft 4, wherein the input shaft 2, the idler shaft 3 and the transfer case output shaft 4 are parallel to each other and are respectively and rotatably connected in the rear axle housing 1; a transfer case driving gear 21 is connected to the input shaft 2 through a spline, a non-double-speed idle gear 31 and a double-speed idle gear 32 are respectively connected to the idle shaft 3 through splines, a non-double-speed driven gear 41 and a double-speed driven gear 42 are respectively and movably connected to the transfer case output shaft 4, the transfer case driving gear 21 is meshed with the non-double-speed idle gear 31, the non-double-speed idle gear 31 is meshed with the non-double-speed driven gear 41, and the double-speed idle gear 32 is meshed with the double-speed driven gear 42; the transfer case is characterized in that a first clutch 5 and a second clutch 6 are arranged on the transfer case output shaft 4, the first clutch 5 is correspondingly matched with the non-double-speed driven gear 41 and drives the transfer case output shaft 4 to enter a four-wheel drive mode or a two-wheel drive mode through contact or separation with the non-double-speed driven gear 41, and the second clutch 6 is correspondingly matched with the double-speed driven gear 42 and drives the transfer case output shaft 4 to enter the double-speed mode or the two-wheel drive mode through contact or separation with the double-speed driven gear 42.
The first clutch 5 and the second clutch 6 of the present embodiment employ wet clutches.
The non-double-speed driven gear 41 and the double-speed driven gear 42 are respectively arranged on the transfer case output shaft 4 in a circumferential rotating mode through the needle roller assemblies 8, and the non-double-speed driven gear 41 and the double-speed driven gear 42 are respectively limited on the transfer case output shaft 4 in an axial direction through thrust washers.
Specifically, as shown in fig. 1, the input shafts 2 of the present embodiment are respectively assembled in the rear axle housing 1 through tapered roller bearings 24, the transfer case driving gear 21 and the tapered roller bearings 24 are arranged at intervals through spacers 23, and the tapered roller bearings 24 can be axially limited on the input shafts 2 through thrust washers 22. The two ends of the idler shaft 3 are respectively assembled in the rear axle housing 1 through a cylindrical roller bearing 33 and a deep groove ball bearing 34. The transfer case output shaft 4 is assembled in the rear axle housing 1 through a deep groove ball bearing 34, and the transfer case output shaft 4 can be assembled with the deep groove ball bearing 34 through a transfer case end cover 40. The transfer case output shaft 4 of the embodiment can be hermetically connected with the rear axle housing 1 and the like through a sealing ring.
One specific scheme of this embodiment is that an oil passage that is correspondingly communicated with the first clutch 5 and the second clutch 6 is arranged on the transfer case output shaft 4, one end of the oil passage extends to an end face of one end of the transfer case output shaft 4, and an oil plug 49 is arranged at one end of the oil passage. The oil duct is arranged on the output shaft of the transfer case, so that oil pressure driving of the two clutches is facilitated.
As shown in fig. 1, an alternative of this embodiment is that the first clutch 5 includes a first housing 51, a first piston 52, a first friction plate closing member 53 and a first spring 54, the first housing 51 is sleeved on the transfer case output shaft 4 and is fixedly connected with the transfer case output shaft 4, a first annular structure 43 is formed on an end surface of the non-double speed driven gear 41 in an extending manner, the first friction plate closing member 53 is sleeved on the first annular structure 43 and is in spline fit therewith, the first piston 52 is axially slidably assembled in the first housing 51 and is in spline fit with the transfer case output shaft 4, and the first spring 54 is sleeved on the transfer case output shaft 4 and is abutted against the first piston 52 and a first retaining ring 45 on the transfer case output shaft 4 respectively; the first piston 52 is in friction fit with the first friction plate clutch 53 and realizes clutch transmission between the non-double-speed driven gear 41 and the transfer case output shaft 4. In the four-wheel drive mode, the first piston can be driven to axially move, so that the first piston is in contact with the first friction plate composite member and in friction fit with the first friction plate composite member, synchronous transmission between the output shaft of the transfer case and the non-double-speed driven gear is realized, and four-wheel drive power output of the output shaft of the transfer case is realized. In the two-drive mode, the first piston is not driven to move axially any more, and under the action of the first spring, the first piston and the first friction plate fitting part are disengaged from each other to realize the relative motion between the output shaft of the transfer case and the non-double-speed driven gear, and the output shaft of the transfer case does not output power any more, namely, the two-drive-force output mode is realized.
As shown in fig. 1, a specific solution of the present embodiment is that a main oil gallery 47 and a first oil branch gallery (not shown in the drawing) are provided on the transfer case output shaft 4, one end of the main oil gallery 47 extends to an end face of the transfer case output shaft 4, one end of the first oil branch gallery is communicated with the main oil gallery 47, and the other end is communicated with a first oil chamber between the first piston 52 and the first housing 51. The first piston may be driven by hydraulic oil axially along the transfer case output shaft.
As shown in fig. 1, an alternative of this embodiment is that the second clutch 6 includes a second housing 61, a second piston 62, a second friction plate fitting 63 and a second spring 64, the second housing 61 is sleeved on the transfer case output shaft 4 and is fixedly connected with the transfer case output shaft 4, a second annular structure 44 is formed on an end surface of the double-speed driven gear 42 in an extending manner, the second friction plate fitting 63 is sleeved on the second annular structure 44 and is in spline fit therewith, the second piston 62 is axially slidably assembled in the second housing 61 and is in spline fit with the transfer case output shaft 4, and the second spring 64 is sleeved on the transfer case output shaft 4 and is abutted to the second piston 62 and the second retaining ring 46 on the transfer case output shaft 4 respectively; the second piston 62 is in friction fit with the second friction plate clutch 63 and realizes clutch transmission between the speed-multiplying driven gear 42 and the transfer case output shaft 4. In the speed-multiplying mode, the second piston can be driven to axially move, so that the second piston is in contact with the second friction plate composite member and in friction fit with the second friction plate composite member, synchronous transmission between the output shaft of the transfer case and the speed-multiplying driven gear is realized, and speed-multiplying power output of the output shaft of the transfer case is realized. In the two-drive mode, the second piston is not driven to move axially any more, and under the action of the second spring, the friction fit between the second piston and the second friction plate assembly is removed, so that the relative motion between the output shaft of the transfer case and the speed-multiplying driven gear is realized, the output shaft of the transfer case does not output power any more, and the two-drive-force output mode is realized.
As shown in fig. 1, in a specific aspect of the present embodiment, a main oil gallery 47 and a second oil gallery 48 are provided on the transfer case output shaft 4, one end of the main oil gallery 47 extends to an end face of the transfer case output shaft 4, one end of the second oil gallery 48 is communicated with the main oil gallery 47, and the other end is communicated with a second oil chamber between the second piston 62 and the second housing 61. The second piston may be driven by hydraulic oil to move axially along the transfer case output shaft.
Specifically, in the present embodiment, the first piston 52 and the second piston 62 are hermetically connected to the corresponding first housing 51 and the second housing 61 through the seal rings 7, respectively, and the first piston 52 and the second piston 62 are also hermetically connected to the transfer case output shaft 4 through the seal rings 7, respectively.
As shown in fig. 1, a specific solution of the present embodiment is that the transmission ratio between the non-double speed idle gear 31 and the non-double speed driven gear 41 is smaller than the transmission ratio between the double speed idle gear 32 and the double speed driven gear 42. By designing different transmission ratios, different mode conversion between the four-wheel drive mode and the double-speed mode is realized.
The working process of the tractor front wheel speed-increasing steering device of the embodiment is that the transfer case driving gear 21 on the input shaft 2 is utilized to drive the non-double speed idle gear 31 to rotate, so as to drive the idle gear shaft 3 and the double speed idle gear 32 to rotate, the double speed idle gear 32 can drive the double speed driven gear 42 to rotate, and the non-double speed idle gear 31 can drive the non-double speed driven gear 41 to rotate. In the two-drive mode, the first clutch and the second clutch are not operated, and the non-double speed driven gear 41 and the double speed driven gear 42 are idle. In the four-wheel drive mode, the first clutch works, the second clutch does not work, the non-double-speed idler 31 drives the non-double-speed driven gear 41 to rotate, and simultaneously, under the work of the second clutch 6, the transfer case output shaft 4 is driven to output power. In the speed-multiplying mode, the first clutch does not work, the second clutch works, the speed-multiplying idler gear 32 drives the speed-multiplying driven gear 42 to rotate, and simultaneously, under the work of the first clutch 5, the transfer case output shaft 4 is driven to output power.
The device that turns to of this embodiment, through two driving and four driving modes at the tractor outside provide another kind of doubly fast driving mode, when tractor straight line travel normal operation, can be driven or four driving by driver oneself selection two, when needs turn to, tractor automatic switch to front wheel acceleration rate state, the front wheel speed increase realizes turning to fast, reduces to turn to the radius circle, alleviates rolling to the soil, improves the operating efficiency.
Example 2
As shown in fig. 1 and fig. 2, the tractor front wheel speed-increasing steering system of the embodiment includes the tractor front wheel speed-increasing steering device, and further includes: the front axle steering angle sensor is mounted on a front axle and used for sending a detected front axle steering angle to the controller, and the rotating speed sensor is mounted on a tractor chassis and used for sending a detected tractor speed to the controller;
the controller is used for controlling the second clutch to be in contact with the speed-multiplying driven gear when the steering angle of the front axle is not smaller than a preset angle and the speed of the tractor is not larger than a preset speed, so that the output shaft 4 of the transfer case enters a speed-multiplying mode;
the controller is used for controlling the second clutch 6 to be separated from the speed-multiplying driven gear 42 when the steering angle of the front axle is not smaller than a preset angle and the speed of the tractor is larger than a preset speed, so that the output shaft 4 of the transfer case enters a two-drive mode.
The controller is also used for controlling the first clutch 5 to be in contact with or separated from the non-double-speed driven gear 41 when the steering angle of the current axle is smaller than a preset angle, and driving the transfer case output shaft 4 to enter a four-wheel drive mode or a two-wheel drive mode. When the steering angle of the front axle does not reach the preset angle, the speed doubling mode is not carried out, and the control is more flexible and reliable.
An alternative of this embodiment is that the first clutch and the second clutch are respectively connected to a first electromagnetic valve and a second electromagnetic valve, and the first electromagnetic valve and the second electromagnetic valve are controlled by the controller to respectively control the clutch actions of the first clutch and the second clutch.
The preset angle may be selected according to different models or needs, and for example, may be 25 ° to 55 °, specifically may be 30 °, 35 °, 40 °, and the like. The preset vehicle speed can also be selected according to different models or requirements, for example, the preset vehicle speed can be 5km/h to 15km/h, specifically 10km/h, 12km/h and the like.
The tractor front wheel speed-increasing steering system of this embodiment still includes speed-multiplying switch and four-wheel drive switch, speed-multiplying switch and four-wheel drive switch respectively with the controller is connected. Different mode control commands can be input through the related switches.
When the steering system of the embodiment works specifically, the two-drive mode is firstly started, and when the steering angle is smaller than a preset angle and the speed of the whole vehicle is greater than the preset speed, the four-drive switch is turned on to enter the four-drive mode; and when the steering angle is not smaller than the preset angle and the speed of the whole vehicle is not larger than the preset speed, turning on the speed-multiplying switch to enter a speed-multiplying mode.
The steering system of the embodiment can control different modes to be switched through parameters detected by the front axle corner sensor and the rotating speed sensor.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A tractor front wheel speed-increasing steering device is characterized by comprising a rear axle shell, an input shaft, an idler shaft and a transfer case output shaft, wherein the input shaft, the idler shaft and the transfer case output shaft are parallel to each other and are respectively and rotatably connected in the rear axle shell; the input shaft is in splined connection with a transfer case driving gear, the idler shaft is respectively in splined connection with a non-double-speed idler and a double-speed idler, the transfer case output shaft is respectively in movable connection with a non-double-speed driven gear and a double-speed driven gear, the transfer case driving gear is meshed with the non-double-speed idler, the non-double-speed idler is meshed with the non-double-speed driven gear, and the double-speed idler is meshed with the double-speed driven gear; the transfer case is characterized in that a first clutch and a second clutch are arranged on the output shaft of the transfer case, the first clutch is correspondingly matched with the non-double-speed driven gear and drives the output shaft of the transfer case to enter a four-wheel drive mode or a two-wheel drive mode through contact or separation with the non-double-speed driven gear, and the second clutch is correspondingly matched with the double-speed driven gear and drives the output shaft of the transfer case to enter the double-speed mode or the two-wheel drive mode through contact or separation with the double-speed driven gear.
2. The tractor front wheel speed-increasing steering device according to claim 1, characterized in that the transfer case output shaft is provided with oil passages respectively corresponding to and communicating with the first clutch and the second clutch, one end of the oil passage extends to one end face of the transfer case output shaft, and one end of the oil passage is provided with an oil plug.
3. The tractor front wheel speed-increasing steering device according to claim 1, characterized in that the first clutch comprises a first shell, a first piston, a first friction plate closing member and a first spring, the first shell is sleeved on the transfer case output shaft and is fixedly connected with the transfer case output shaft, a first annular structure is formed on the end surface of the non-double speed driven gear in an extending mode, the first friction plate closing member is sleeved on the first annular structure and is in spline fit with the first annular structure, the first piston is assembled in the first shell in an axially sliding mode and is in spline fit with the transfer case output shaft, and the first spring is sleeved on the transfer case output shaft and is abutted against the first piston and a first retaining ring on the transfer case output shaft respectively; the first piston is in friction fit with the first friction plate combined piece, and clutch transmission between the non-double-speed driven gear and the transfer case output shaft is achieved.
4. The tractor front wheel speed increasing steering device according to claim 3, wherein a main oil gallery and a first oil branch gallery are arranged on the transfer case output shaft, one end of the main oil gallery extends to one end face of the transfer case output shaft, one end of the first oil branch gallery is communicated with the main oil gallery, and the other end of the first oil branch gallery is communicated with a first oil cavity between the first piston and the first shell.
5. The tractor front wheel speed-increasing steering device according to claim 1, characterized in that the second clutch comprises a second shell, a second piston, a second friction plate closing member and a second spring, the second shell is sleeved on the transfer case output shaft and is fixedly connected with the transfer case output shaft, a second annular structure is formed on the end surface of the speed-increasing driven gear in an extending mode, the second friction plate closing member is sleeved on the second annular structure and is in spline fit with the second annular structure, the second piston is assembled in the second shell in an axially sliding mode and is in spline fit with the transfer case output shaft, and the second spring is sleeved on the transfer case output shaft and is respectively abutted to a second piston and a second retainer on the transfer case output shaft; the second piston is in friction fit with the second friction plate composite member and realizes clutch transmission between the speed-multiplying driven gear and the transfer case output shaft.
6. The tractor front wheel speed increasing steering device according to claim 5, characterized in that a main oil gallery and a second oil gallery are arranged on the transfer case output shaft, one end of the main oil gallery extends to one end face of the transfer case output shaft, one end of the second oil gallery is communicated with the main oil gallery, and the other end of the second oil gallery is communicated with a second oil cavity between a second piston and a second shell.
7. The tractor front wheel speed increasing steering device according to claim 1, characterized in that the transmission ratio between the non-double speed idler gear and the non-double speed driven gear is smaller than the transmission ratio between the double speed idler gear and the double speed driven gear.
8. A tractor front wheel step-up steering system comprising the tractor front wheel step-up steering apparatus of any one of claims 1 to 7, further comprising: the front axle rotation angle sensor is installed on a front axle and connected with the controller, and the rotation speed sensor is installed on a tractor chassis and connected with the controller.
9. The tractor front wheel step-up steering system according to claim 8, further comprising a speed-multiplying switch, wherein the speed-multiplying switch is connected to the controller.
10. The tractor front wheel step-up steering system of claim 8, further comprising a four-drive switch, wherein the four-drive switch is connected to the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220969507.8U CN217197779U (en) | 2022-04-21 | 2022-04-21 | Tractor front wheel acceleration rate turns to device and a steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220969507.8U CN217197779U (en) | 2022-04-21 | 2022-04-21 | Tractor front wheel acceleration rate turns to device and a steering system |
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| CN217197779U true CN217197779U (en) | 2022-08-16 |
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| CN202220969507.8U Active CN217197779U (en) | 2022-04-21 | 2022-04-21 | Tractor front wheel acceleration rate turns to device and a steering system |
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Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai Lovol Intelligent Agricultural Technology Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: Weichai leiwo Heavy Industry Co.,Ltd. |
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