A power shift and power reversing tractor gearbox

Abstract

The present invention relates to the technical field of transmission devices, and in particular to a power shift and power reversing tractor gearbox, wherein the technical solution comprises a first housing, a drive shaft and a second housing, wherein a mounting hole is provided inside the first housing, and a ball bearing is fixedly installed inside the mounting hole; and a drive shaft is installed inside the first housing. The present invention drives lubricating oil to flow inside the first housing and the second housing by using a driving blade and a driven blade to cooperate, and the driving blade rotates synchronously with the driving shaft, and the lubricating oil driven by the driving blade flows from the first housing to the second housing, thereby achieving lubrication and heat dissipation for the first housing and the second housing and the surrounding structures, and at the same time, the flowing lubricating oil drives the driven blade to rotate, and under the influence of the driven blade, the lubricating oil flows from the second housing to the first housing, and flows to the central position of the gearbox, thereby achieving lubrication and heat dissipation for the transmission structure inside the gearbox.

Description

Technical Field

[0001] The invention relates to the technical field of transmission devices, in particular to a power shift and power reversing tractor gearbox. Background Art

[0002] Tractors are widely used in agriculture and industry due to their good traction performance. As an important part of the tractor structure, the gearbox plays a very important role in the power transmission of the engine. It can not only transmit power, but also adjust the direction of power transmission as needed, making the tractor easier to use. Therefore, in order to improve the performance of the tractor gearbox, we propose a power shift and power reversing tractor gearbox.

[0003] The prior art also has the following defects during use:

[0004] 1. The tractor gearbox in the prior art usually uses the self-rotation of the transmission structure to drive the flow of lubricating oil to lubricate the internal structure of the gearbox. However, the traditional lubrication method has an unsatisfactory lubrication effect, a limited flow range of the lubricating oil, and an unsatisfactory heat dissipation effect of the lubricating oil on the gearbox, which easily causes the gearbox to overheat and be damaged.

[0005] 2. When the tractor gearbox in the prior art transmits power, the transmission structure is not ideal for the stability of power transmission. When the power is transmitted between the internal structures of the gearbox, it is affected by the mutual meshing of the internal structures of the gearbox. When the power is transmitted through the shaft, it is easy to cause high-frequency vibration in the gearbox, thereby affecting the structural stability of the gearbox in the process of power transmission. When the gearbox is connected to the driving end and the driven end, the stability of the connecting part will also be affected.

[0006] In view of this, we propose a power shift and power reversing tractor gearbox to solve the existing problems. Summary of the invention

[0007] The object of the present invention is to provide a power shift and power reversing tractor gearbox to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a power shift and power reversing tractor gearbox, comprising a first housing, a drive shaft and a second housing, wherein a mounting hole is provided inside the first housing, and a ball bearing is fixedly installed inside the mounting hole;

[0009] A driving shaft is installed through the interior of the first shell, and one end of the driving shaft extends to the interior of the first shell and is fixedly installed with a plurality of driving blades;

[0010] A second housing is installed on one side of the first housing by bolts, a guide ring is fixedly installed on the inner wall of the second housing, a plurality of driven blades are rotatably installed inside the guide ring, a counterweight ring is fixedly installed on the inner side of the driven blade, the counterweight ring is an annular disc structure, the counterweight ring is engaged with the inner wall of the second housing, and a plurality of spring cylinders are fixedly installed inside the counterweight ring;

[0011] A second driven shaft is fixedly mounted on one end of the driving shaft, a third driven shaft is sleeved on the outer side of the second driven shaft, and the first driven shaft is sleeved on the outer side of the third driven shaft;

[0012] Two drive plates are rotatably mounted between the first shell and the second shell, six spring rods are fixedly mounted between the drive plates, a plurality of groups of friction plates are fixedly mounted on the outer sides of the spring rods, and the inner sides of the friction plates are fixedly connected to the first driven shaft and the third driven shaft respectively.

[0013] Preferably, a counterweight block is movably installed inside the spring barrel, a return spring is fixedly installed on one side of the counterweight block, and one end of the return spring is fixedly connected to the inner wall of the spring barrel, and the interior of the spring barrel is filled with oil.

[0014] Preferably, a spline is provided on the outer side of the driving shaft, and a latching tooth is provided on the inner wall of one end of the driving shaft close to the driving blade.

[0015] Preferably, the interior of the guide ring is a T-shaped groove, and a plurality of balls are installed at the connection position between the guide ring and the driven blade.

[0016] Preferably, a plurality of groups of propulsion springs are fixedly mounted on the outer side of the spring rod, and two adjacent propulsion springs are fixedly connected to both sides of the friction plate.

[0017] Preferably, two solenoid valves are fixedly mounted on a side of the second shell away from the first shell, and a liquid inlet hole is provided in the second shell at a solenoid valve mounting position, and the solenoid valve is externally connected to a flow guide pipe.

[0018] Preferably, a sealing ring is fixedly installed between the first shell and the second shell, and the interiors of the first shell and the second shell are filled with lubricating oil, and the amount of lubricating oil filled accounts for 90% of the volume between the first shell and the second shell.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention drives the lubricating oil to flow inside the first housing and the second housing by cooperating with the driving blade and the driven blade. The driving blade rotates synchronously with the driving shaft. The lubricating oil driven by the driving blade flows from the first housing to the second housing, thereby lubricating and dissipating the first housing, the second housing and the surrounding structures. At the same time, the flowing lubricating oil drives the driven blade to rotate. Under the influence of the driven blade, the lubricating oil flows from the second housing to the first housing and flows to the central position of the gearbox, thereby lubricating and dissipating the transmission structure inside the gearbox, and forms a circulation with the lubricating oil near the inner wall, thereby continuously achieving efficient lubrication and heat dissipation of the outer shell and the internal structure of the gearbox, thereby improving the transmission efficiency and heat dissipation performance of the gearbox.

[0021] 2. The present invention installs a plurality of spring cylinders inside the counterweight ring, drives the counterweight ring to rotate through the driven blades, and generates centrifugal force when the counterweight ring rotates, so that the counterweight block inside the spring cylinder moves away from the axis, thereby improving the stability of the shaft rotation of the gearbox during the transmission process, and reducing the amplitude of the high-frequency vibration of the gearbox itself by increasing the counterweight. In addition, the rotation of the counterweight ring is driven by lubricating oil and is not directly connected to the transmission structure inside the gearbox, so it will not affect the transmission efficiency, thereby increasing the practicality and stability of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention;

[0024] Figure 3 It is a schematic diagram of a partial three-dimensional cross-sectional structure of the present invention;

[0025] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0026] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0027] Figure 6 It is a front structural schematic diagram of the present invention;

[0028] Figure 7 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0029] Figure 8 It is a schematic diagram of the partial cross-sectional structure of the front side of the present invention.

[0030] In the figure: 1, first housing; 2, driving shaft; 201, driving blade; 3, second housing; 301, driven blade; 302, guide ring; 303, counterweight ring; 304, spring tube; 305, counterweight block; 306, return spring; 4, first driven shaft; 5, second driven shaft; 6, third driven shaft; 7, driving disk; 701, spring rod; 702, friction plate. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figure 1 - Figure 8 As shown, a power shift and power reversing tractor gearbox proposed by the present invention comprises a first housing 1, a drive shaft 2 and a second housing 3. A mounting hole is provided inside the first housing 1, and a ball bearing is fixedly installed inside the mounting hole. The first housing 1 and the second housing 3 cooperate to provide a mounting position for the internal components, so as to facilitate the transmission of power by utilizing the internal structure. The ball bearing can facilitate the installation of the drive shaft 2 and avoid the friction between the drive shaft 2 and the first housing 1 when rotating, thereby improving the durability of the device.

[0033] A driving shaft 2 is installed through the interior of the first housing 1. One end of the driving shaft 2 extends to the interior of the first housing 1 and is fixedly installed with a plurality of driving blades 201. The driving shaft 2 is fixedly connected to the inner ring of a ball bearing installed inside the first housing 1. The driving shaft 2 can be connected to the engine, so that the driving shaft 2 is driven to rotate by the engine, and then the transmission structure inside the gearbox is driven to rotate by the driving shaft 2. The driving blades 201 can rotate synchronously with the driving shaft 2, and then the lubricating oil inside the gearbox is driven to flow by the driving blades 201, so that the action range of the lubricating oil is expanded, and the lubrication effect and heat dissipation efficiency of the internal structure of the gearbox are improved;

[0034] A second shell 3 is installed on one side of the first shell 1 by bolts, and a guide ring 302 is fixedly installed on the inner wall of the second shell 3. A plurality of driven blades 301 are rotatably installed inside the guide ring 302, and a counterweight ring 303 is fixedly installed on the inner side of the driven blade 301. The counterweight ring 303 is an annular disc-shaped structure, which is engaged with the inner wall of the second shell 3, and a plurality of spring cylinders 304 are fixedly installed inside the counterweight ring 303. The second shell 3 can provide an installation position for the surrounding components, so as to cooperate with the first shell 1 and provide a closed installation and working environment for the internal transmission structure to ensure the stability of the transmission structure during operation. The guide ring 302 can be engaged with the driven blade 301 to connect the plurality of The driven blade 301 is installed on the inner wall of the second housing 3, and the driven blade 301 can rotate along the guide ring 302. The driven blade 301 is pushed by the lubricating oil and can perform circular motion along the guide ring 302, thereby guiding the lubricating oil to flow to the central position of the gearbox and driving the counterweight ring 303 to rotate. The counterweight ring 303 is fixedly connected to the inner side of the driven blade 301. When the counterweight ring 303 rotates, centrifugal force can be generated, thereby driving the counterweight block 305 inside the spring barrel 304 to deviate from the axis and rotate synchronously with the counterweight ring 303. The spring barrel 304 can rotate synchronously with the counterweight ring 303 and provide a mounting position for the counterweight block 305 and the return spring 306.

[0035] A second driven shaft 5 is fixedly mounted on one end of the driving shaft 2, a third driven shaft 6 is sleeved on the outer side of the second driven shaft 5, and a first driven shaft 4 is sleeved on the outer side of the third driven shaft 6. The first driven shaft 4 and the third driven shaft 6 are respectively connected to the friction plate 702, and can be driven to rotate by the friction plate 702, thereby respectively driving the corresponding connected structures, so as to apply driving force to different transmission structures of the tractor. The second driven shaft 5 can be directly connected to the driving shaft 2, so that the driving shaft 2 and the second driven shaft 5 form a transmission shaft, thereby directly transmitting the driving force applied by the engine;

[0036] Two driving disks 7 are rotatably installed inside the first housing 1, and six spring rods 701 are fixedly installed between the driving disks 7. Several groups of friction plates 702 are fixedly installed on the outer sides of the spring rods 701, and the inner sides of the friction plates 702 are fixedly connected to the first driven shaft 4 and the third driven shaft 6 respectively. The driving disk 7 can be connected to the driving shaft 2, thereby driving the spring rods 701 and the friction plates 702 on the outer sides of the spring rods 701 to rotate. The spring rods 701 can provide an installation position for the friction plates 702, and when the transmission connection is disconnected, the friction plates 702 can be quickly reset. The friction plates 702 are divided into two groups, one group is installed on the outer side of the spring rods 701, and the other group is fixedly connected to the first driven shaft 4 or the third driven shaft 6 respectively. The friction plates 702 can contact each other, thereby connecting the driving shaft 2 to the first driven shaft 4 or the third driven shaft 6 to transmit power.

[0037] Furthermore, a counterweight block 305 is movably installed inside the spring barrel 304, a return spring 306 is fixedly installed on one side of the counterweight block 305, and one end of the return spring 306 is fixedly connected to the inner wall of the spring barrel 304, the interior of the spring barrel 304 is filled with oil, and the amount of oil filled inside the spring barrel 304 accounts for 70% of the internal volume of the spring barrel 304, and the counterweight block 305 can balance the counterweight ring 303. When the counterweight ring 303 rotates, the centrifugal force can move the counterweight block 305 toward the outer ring, thereby promoting the rotation of the counterweight ring 303. The centrifugal force generated when the counterweight ring 303 rotates can be used to improve the stability of the gearbox as a whole during operation and reduce the vibration amplitude generated during the transmission process of the gearbox. When the counterweight ring 303 stops rotating, the return spring 306 can pull the counterweight block 305 to move toward the inner ring of the counterweight ring 303, thereby making the center of gravity of the counterweight ring 303 close to the axis position, avoiding the counterweight ring 303 from adding load to the driven blade 301, making the driving force required for the driven blade 301 to rotate from stationary to rotating smaller, and making it easier to drive the driven blade 301 to rotate.

[0038] Furthermore, a spline is provided on the outer side of the drive shaft 2, and a latch is provided on the inner wall of one end of the drive shaft 2 close to the drive blade 201. The drive shaft 2 can drive the transmission structure inside the gearbox, and then cooperate with the transmission structure inside the gearbox to transmit power in different ways.

[0039] Furthermore, the interior of the guide ring 302 is a T-shaped groove, and a plurality of balls are installed at the connection position between the guide ring 302 and the driven blade 301 . The guide ring 302 can guide the driven blade 301 so that the driven blade 301 can perform circular motion along the guide ring 302 .

[0040] Furthermore, a plurality of thrust springs are fixedly installed on the outer side of the spring rod 701, and two adjacent thrust springs are fixedly connected to the two sides of the friction plate 702. The thrust springs can elastically support the friction plate 702, so that when the friction plate 702 is subjected to horizontal pressure, they can engage with each other to achieve a hard connection, thereby transmitting power. When the connection is disconnected, the spring rod 701 can apply elastic force to the friction plate 702, thereby pushing the friction plate 702 to reset.

[0041] Furthermore, two solenoid valves are fixedly installed on one side of the second shell 3 away from the first shell 1. The second shell 3 is provided with a liquid inlet hole at the solenoid valve installation position. The solenoid valve is externally connected to a guide pipe. The solenoid valve can control the switch of the guide pipe, thereby allowing the lubricating oil to enter the interior of the gearbox, and the lubricating oil pushes the driving disk 7 on one side to move, so that the distance between the friction plates 702 gradually decreases until they contact. After the friction plates 702 contact, power transmission can be achieved, thereby achieving transmission.

[0042] Furthermore, a sealing ring is fixedly installed between the first shell 1 and the second shell 3, and the interior of the first shell 1 and the second shell 3 is filled with lubricating oil, and the lubricating oil filling amount accounts for 90% of the volume between the first shell 1 and the second shell 3. The sealing ring can improve the sealing between the first shell 1 and the second shell 3, thereby preventing liquid leakage from the gap between the first shell 1 and the second shell 3.

[0043] Working principle: After the device is assembled and checked and confirmed to be correct, the driving shaft 2 is connected to the engine driving shaft 2 of the tractor, the first driven shaft 4, the second driven shaft 5 and the third driven shaft 6 are connected to the driven structure in sequence, and the guide pipe is connected to the lubricating oil pump of the tractor. The driving shaft 2 is driven by the tractor engine to rotate, and the driving shaft 2 drives the driving blade 201 to rotate. The driving blade 201 drives the lubricating oil inside the gearbox to flow to the driven blade 301, and the driven blade 301 is driven to rotate by the flowing lubricating oil, so that the lubricating oil is driven to flow back through the driven blade 301, and flows from the central position of the gearbox to the driving blade 201, forming a cycle, and at the same time The weight ring 303 rotates with the driven blade 301, and the counterweight block 305 is moved toward the outer ring of the counterweight ring 303 under the influence of centrifugal force. The lubricating oil pump applies thrust to the driving disk 7 on one side of the second housing 3, so that the driving disk 7 on one side of the second housing 3 pushes the friction plate 702 to move, and the first driven shaft 4 or the third driven shaft 6 is connected to the driving shaft 2 through the friction plate 702, so that the driving shaft 2 drives the first driven shaft 4 or the third driven shaft 6. When direct power transmission is required, the second driven shaft 5 is connected to the driving shaft 2, so that the driving shaft 2 is directly connected to the second driven shaft 5, and the second driven shaft 5 is driven to rotate, thereby realizing the transmission of tractor engine power.

[0044] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A power shift and power reversing tractor gearbox, comprising a first housing (1), a drive shaft (2) and a second housing (3), characterized in that: A mounting hole is provided inside the first shell (1), and a ball bearing is fixedly installed inside the mounting hole; A driving shaft (2) is installed through the interior of the first shell (1); one end of the driving shaft (2) extends to the interior of the first shell (1) and is fixedly installed with a plurality of driving blades (201); A second housing (3) is mounted on one side of the first housing (1) by means of bolts, a guide ring (302) is fixedly mounted on the inner wall of the second housing (3), a plurality of driven blades (301) are rotatably mounted inside the guide ring (302), a counterweight ring (303) is fixedly mounted on the inner side of the driven blades (301), the counterweight ring (303) is an annular disc-shaped structure, the counterweight ring (303) is engaged with the inner wall of the second housing (3), and a plurality of spring cylinders (304) are fixedly mounted inside the counterweight ring (303); A second driven shaft (5) is fixedly mounted on one end of the driving shaft (2); a third driven shaft (6) is sleeved on the outer side of the second driven shaft (5); and the first driven shaft (4) is sleeved on the outer side of the third driven shaft (6); Two drive disks (7) are rotatably mounted between the first housing (1) and the second housing (3), six spring rods (701) are fixedly mounted between the drive disks (7), a plurality of groups of friction plates (702) are fixedly mounted on the outer sides of the spring rods (701), and the inner sides of the friction plates (702) are fixedly connected to the first driven shaft (4) and the third driven shaft (6), respectively.

2. A power shift and power reversing tractor gearbox according to claim 1, characterized in that: A counterweight block (305) is movably installed inside the spring tube (304), a return spring (306) is fixedly installed on one side of the counterweight block (305), and one end of the return spring (306) is fixedly connected to the inner wall of the spring tube (304), and the interior of the spring tube (304) is filled with oil.

3. A power shift and power reversing tractor gearbox according to claim 1, characterized in that: The outer side of the driving shaft (2) is provided with a spline, and the inner wall of one end of the driving shaft (2) close to the driving blade (201) is provided with a latching tooth.

4. A power shift and power reversing tractor gearbox according to claim 1, characterized in that: The interior of the guide ring (302) is a T-shaped groove, and a plurality of balls are installed at the connection position between the guide ring (302) and the driven blade (301).

5. A power shift and power reversing tractor gearbox according to claim 1, characterized in that: A plurality of groups of propulsion springs are fixedly mounted on the outer side of the spring rod (701), and two adjacent propulsion springs are fixedly connected to the two sides of the friction plate (702).

6. A power shift and power reversing tractor gearbox according to claim 1, characterized in that: Two solenoid valves are fixedly mounted on a side of the second shell (3) away from the first shell (1); a liquid inlet hole is provided in the second shell (3) at the solenoid valve mounting position; and the solenoid valve is externally connected to a flow guide pipe.

7. A power shift and power reversing tractor gearbox according to claim 1, characterized in that: A sealing ring is fixedly installed between the first shell (1) and the second shell (3), and the interiors of the first shell (1) and the second shell (3) are filled with lubricating oil, with the amount of lubricating oil filling accounting for 90% of the volume between the first shell (1) and the second shell (3).

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