CN220281125U - Tractor rear axle assembly with variable pump - Google Patents
Tractor rear axle assembly with variable pump Download PDFInfo
- Publication number
- CN220281125U CN220281125U CN202322074894.6U CN202322074894U CN220281125U CN 220281125 U CN220281125 U CN 220281125U CN 202322074894 U CN202322074894 U CN 202322074894U CN 220281125 U CN220281125 U CN 220281125U
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- CN
- China
- Prior art keywords
- rear axle
- axle assembly
- hydraulic
- lifter
- variable pump
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- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003971 tillage Methods 0.000 description 1
- 238000009333 weeding Methods 0.000 description 1
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- Arrangement And Driving Of Transmission Devices (AREA)
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Abstract
The utility model belongs to the technical field of tractors, in particular to a tractor rear axle assembly with a variable pump, which comprises a rear axle assembly shell and a PTO input shaft, wherein a lifter assembly is arranged on the rear axle assembly shell and comprises a lifter bracket fixed on the outer wall of the rear axle assembly shell and a lifter rocker arm hinged on the lifter bracket, the outer wall of the rear axle assembly shell is provided with the variable pump, the PTO input shaft is in transmission connection with the power input shaft of the variable pump through a transmission gear set, and the hydraulic output end of the variable pump is respectively communicated with a lifter oil cylinder and a power motor of an external agricultural implement through a hydraulic multi-way valve. The utility model reasonably simplifies the structure of the lifter assembly, so that the existing rear axle assembly shell can vacate the space for assembling the variable pump, and the variable hydraulic pressure is output to the lifter and the driving motor of the farm implement by means of the load sensitive control system of the variable pump, thereby having high transmission efficiency, small power loss and energy saving.
Description
Technical field:
the utility model belongs to the technical field of tractors, and particularly relates to a tractor rear axle assembly with a variable pump.
The background technology is as follows:
the tractor is used as the main machine for farmland operation, and can carry various farm tools to carry out farmland operation such as tillage, raking, plowing and the like, and the matched tool hydraulic lifting device is indispensable. The hydraulic lifting device of the traditional machine is generally called a lifter, integrates a lifting oil cylinder, a control valve, an operating mechanism and some hydraulic elements into a shell, is usually positioned on a rear axle assembly of a tractor, is driven to operate by a hydraulic system on the tractor, and is used for hydraulically lifting and adjusting the posture of the farm machine. Meanwhile, agricultural machinery such as rotary tillers, weeding machines, rear-drive trailers and the like with hydraulic drive are required to be driven by a hydraulic system on a tractor to operate.
The conventional hydraulic system of the tractor uses a gear pump driven by an engine to work as a hydraulic power source, only can quantitatively output power, and is difficult to adjust the output power.
The utility model comprises the following steps:
the utility model aims to provide a tractor rear axle assembly with a variable pump, which reasonably simplifies the structure of a lifter assembly, so that the existing rear axle assembly shell can vacate the space for the assembly of the variable pump, and the variable hydraulic pressure is output to the lifter and a driving motor of an agricultural implement by means of a load sensitive control system of the variable pump, thereby having high transmission efficiency, small power loss and energy conservation.
The utility model is realized in the following way:
the utility model provides a tractor rear axle assembly with variable pump, includes rear axle assembly casing and rotates the PTO input shaft of connecting on rear axle assembly casing, is equipped with the riser assembly on the rear axle assembly casing, the riser assembly is including fixing the riser support on rear axle assembly casing outer wall, and articulates the riser rocking arm on the riser support, is equipped with the variable pump on the rear axle assembly casing outer wall that is located riser support one side, the PTO input shaft passes through drive gear group and is connected with the power input shaft transmission of variable pump, the hydraulic output of variable pump respectively with the power motor intercommunication of riser hydro-cylinder and external agricultural implement through the hydraulic pressure multiple unit valve, drives the riser rocking arm by the flexible end of riser hydro-cylinder and articulates the rotation.
In the tractor rear axle assembly with the variable pump, the transmission gear set comprises a hydraulic driving gear fixedly sleeved on the PTO input shaft and a hydraulic driven gear fixedly sleeved on the variable pump power input shaft, an intermediate shaft is arranged on the rear axle assembly shell, and a hydraulic intermediate gear meshed with the hydraulic driving gear and the hydraulic driven gear respectively is sleeved on the intermediate shaft.
In the tractor rear axle assembly with the variable pump, the transmission ratio among the hydraulic driving gear, the hydraulic intermediate gear and the hydraulic driven gear is smaller than 1.
In the tractor rear axle assembly with the variable pump, the rear axle assembly shell is provided with the transmission window, the transmission window is covered with the assembly base with the transmission inner cavity, the variable pump is fixed on the assembly base, the power input shaft of the variable pump is inserted into the transmission inner cavity and sleeved with the hydraulic driven gear, and the hydraulic intermediate gear penetrates through the transmission window and a part of the hydraulic intermediate gear stretches into the transmission inner cavity.
In the tractor rear axle assembly with the variable pump, the hydraulic driving gear is in running fit with the rear axle assembly shell through the bearing, and the hydraulic driven gear is in running fit with the assembly base through the bearing.
Compared with the prior art, the utility model has the outstanding advantages that:
the utility model reasonably simplifies the structure of the lifter assembly, so that the existing rear axle assembly shell can vacate the space for assembling the variable pump, the PTO input shaft transmits power to the variable pump through the transmission gear assembly, and the variable hydraulic pressure is output to the lifter and the driving motor of the farm implement by means of the load sensitive control system of the variable pump according to the size of the load, thereby having high transmission efficiency, small power loss and energy saving.
Description of the drawings:
FIG. 1 is a partial block diagram of a variable displacement pump and lifter assembly of the present utility model assembled to a rear axle assembly housing.
In the figure: 1. a PTO input shaft; 2. a lifter bracket; 3. a lifter rocker arm; 4. a variable displacement pump; 5. a hydraulic drive gear; 6. a hydraulic driven gear; 7. an intermediate shaft; 8. a hydraulic intermediate gear.
The specific embodiment is as follows:
the utility model is further described below with reference to fig. 1 by way of specific examples:
the utility model provides a tractor rear axle assembly with variable pump, includes rear axle assembly casing and rotates PTO input shaft 1 of connecting on rear axle assembly casing, is equipped with the riser assembly on the rear axle assembly casing, the riser assembly is including fixing the riser support 2 on rear axle assembly casing outer wall and articulated riser rocking arm 3 on riser support 2, is equipped with variable pump 4 on the rear axle assembly casing outer wall that is located riser support 2 one side, PTO input shaft 1 passes through drive gear group and is connected with variable pump 4's power input shaft transmission, and variable pump 4's hydraulic output end is through hydraulic pressure multiple unit valve and riser hydro-cylinder and external agricultural implement's power motor intercommunication respectively, is articulated the rotation by the flexible end drive riser rocking arm 3 of riser hydro-cylinder.
The utility model reasonably simplifies the structure of the lifter assembly, so that the space for assembling the variable pump 4 can be vacated on the existing rear axle assembly shell, the PTO input shaft 1 transmits power to the variable pump 4 through the transmission gear assembly, and the variable hydraulic pressure is output to the lifter and the driving motor of the farm machinery by means of the load sensitive control system of the variable pump 4 according to the size of the load, thereby having high transmission efficiency, small power loss and energy saving.
Further, in this embodiment, the specific transmission structure adopted by the transmission gear set is: the transmission gear set comprises a hydraulic driving gear 5 fixedly sleeved on the PTO input shaft 1 and a hydraulic driven gear 6 fixedly sleeved on the power input shaft of the variable pump 4, an intermediate shaft 7 is arranged on the rear axle assembly shell, and the intermediate shaft 7 is sleeved with a hydraulic intermediate gear 8 which is meshed with the hydraulic driving gear 5 and the hydraulic driven gear 6 respectively.
Meanwhile, the transmission ratio among the hydraulic driving gear 5, the hydraulic intermediate gear 8 and the hydraulic driven gear 6 is smaller than 1, namely, speed-increasing transmission, and in the embodiment, the rated rotation speed of the PTO input shaft 1 is 2200r/min, and the rotation speed of the power input shaft of the variable pump 4 is 2500r/min.
Still further, in order to make the variable pump 4 can fixed assembly on the rear axle assembly casing, set up the transmission window on the rear axle assembly casing, transmission window department lid is equipped with the assembly base that has the transmission inner chamber, the variable pump 4 is fixed on the assembly base, and the power input shaft of variable pump 4 inserts in the transmission inner chamber and the cover is equipped with hydraulic driven gear 6, hydraulic idler gear 8 runs through the transmission window and a part stretches into in the transmission inner chamber.
In addition, in order to improve rotational stability of the PTO and the hydraulic drive gear 5 on the rear axle assembly housing and rotational stability of the power input shaft of the variable pump 4 and the hydraulic driven gear 6 on the assembly base, the hydraulic drive gear 5 is in rotational fit with the rear axle assembly housing through a bearing, and the hydraulic driven gear 6 is in rotational fit with the assembly base through a bearing.
The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model, therefore: all equivalent changes in shape, structure and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (5)
1. The utility model provides a tractor rear axle assembly with variable pump, is equipped with riser assembly, its characterized in that including rear axle assembly casing and rotation connection PTO input shaft (1) on rear axle assembly casing on the rear axle assembly casing: the lifter assembly comprises a lifter support (2) fixed on the outer wall of a shell of the rear axle assembly and a lifter rocker arm (3) hinged on the lifter support (2), a variable pump (4) is arranged on the outer wall of the shell of the rear axle assembly and positioned on one side of the lifter support (2), a PTO input shaft (1) is in transmission connection with a power input shaft of the variable pump (4) through a transmission gear set, and a hydraulic output end of the variable pump (4) is respectively communicated with a lifter oil cylinder and a power motor of an external agricultural implement through a hydraulic multi-way valve, and a telescopic end of the lifter oil cylinder drives the lifter rocker arm (3) to hinge and rotate.
2. A tractor rear axle assembly having a variable displacement pump as defined by claim 1 wherein: the transmission gear set comprises a hydraulic driving gear (5) fixedly sleeved on the PTO input shaft (1) and a hydraulic driven gear (6) fixedly sleeved on the power input shaft of the variable pump (4), an intermediate shaft (7) is arranged on the rear axle assembly shell, and the intermediate shaft (7) is sleeved with a hydraulic intermediate gear (8) which is meshed with the hydraulic driving gear (5) and the hydraulic driven gear (6) respectively.
3. A tractor rear axle assembly having a variable displacement pump as defined by claim 2 wherein: the transmission ratio among the hydraulic driving gear (5), the hydraulic intermediate gear (8) and the hydraulic driven gear (6) is smaller than 1.
4. A tractor rear axle assembly having a variable displacement pump as defined by claim 2 wherein: the rear axle assembly comprises a rear axle assembly body, a rear axle assembly body is characterized in that a transmission window is formed in the rear axle assembly body, an assembly base with a transmission inner cavity is covered at the transmission window, a variable pump (4) is fixed on the assembly base, a power input shaft of the variable pump (4) is inserted into the transmission inner cavity and sleeved with a hydraulic driven gear (6), and a hydraulic intermediate gear (8) penetrates through the transmission window and a part of the hydraulic intermediate gear stretches into the transmission inner cavity.
5. A tractor rear axle assembly having a variable displacement pump as defined by claim 4 wherein:
the hydraulic driving gear (5) is in running fit with the rear axle assembly shell through a bearing, and the hydraulic driven gear (6) is in running fit with the assembly base through a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322074894.6U CN220281125U (en) | 2023-08-03 | 2023-08-03 | Tractor rear axle assembly with variable pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322074894.6U CN220281125U (en) | 2023-08-03 | 2023-08-03 | Tractor rear axle assembly with variable pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220281125U true CN220281125U (en) | 2024-01-02 |
Family
ID=89330897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322074894.6U Active CN220281125U (en) | 2023-08-03 | 2023-08-03 | Tractor rear axle assembly with variable pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220281125U (en) |
-
2023
- 2023-08-03 CN CN202322074894.6U patent/CN220281125U/en active Active
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| GR01 | Patent grant |