CN113586694A

CN113586694A - Gear box

Info

Publication number: CN113586694A
Application number: CN202110955336.3A
Authority: CN
Inventors: 包青春
Original assignee: Inner Mongolia Baoshi Machinery R & D Co ltd
Current assignee: Inner Mongolia Baoshi Machinery R & D Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2021-11-02

Abstract

The invention relates to a gearbox, which comprises an input gear (2), an output gear set (3), a transfer shaft (4) and a first conversion gear (5), wherein the first conversion gear (5) is fixedly sleeved on the transfer shaft (4) and is meshed with the input gear (2), the gearbox also comprises a second conversion gear (6) and a clutch (7), the second conversion gear (6) is sleeved on the transfer shaft (4) and is connected with the transfer shaft (4) through the clutch (7), and the second conversion gear (6) is also connected with the output gear set (3). The speed changer can freely control whether the output gear set works or not.

Description

Gear box

Technical Field

The present invention relates to a gearbox having input and output gears.

Background

The prior art gearboxes used in harvesting apparatus are usually provided with one input and a plurality of outputs. For example, patent CN211778903U discloses a gear box, which uses a bevel gear to complete power input, and uses several bevel gears as output gears to realize one-in three-out. However, harvesting equipment is typically fed and squeezed. That is, the output of the gearbox is inactive during a particular process. Therefore, a gearbox applied to harvesting equipment needs to be capable of flexibly controlling the starting and stopping of the output end, and the gearbox disclosed in the patent obviously cannot achieve the purpose.

Disclosure of Invention

The invention aims to provide a gearbox.

In order to achieve the purpose, the invention provides a gearbox which comprises an input gear, an output gear set, a transfer shaft, a first conversion gear, a second conversion gear and a clutch, wherein the first conversion gear is fixedly sleeved on the transfer shaft and is meshed with the input gear, the second conversion gear is sleeved on the transfer shaft and is connected with the transfer shaft through the clutch, and the second conversion gear is also connected with the output gear set.

According to one aspect of the present invention, the clutch includes a driving portion, a driven portion, and a pressing piece;

the driving part is fixedly sleeved on the transfer shaft, and the driven part is rotatably connected with the driving part;

the outer side of one end, close to the driving part, of the driven part is provided with a connecting part, and the second conversion gear is fixed on the connecting part;

the driven part is provided with an oil duct, and the pressing piece is movably arranged between the driving part and the driven part and is positioned at an oil outlet end of the oil duct.

According to one aspect of the present invention, a clutch plate is provided outside the driving part;

the outer side of one end, close to the driving portion, of the driven portion is provided with a baffle, and a butterfly spring is arranged between the baffle and the pressing piece.

According to one aspect of the utility model, the oil supply component is also included, and comprises a fourth conversion gear, a fifth conversion gear and an oil pump which are meshed with each other;

the fourth conversion gear is arranged on the transfer shaft, and the fifth conversion gear is arranged at the power input end of the oil pump;

and the oil output end of the oil pump is connected with the oil duct.

According to one aspect of the present invention, the output gear set includes a first output gear, a third conversion gear, and a second output gear that mesh with the second conversion gear;

the third conversion gear is also meshed with a third output gear and a fourth output gear.

According to one aspect of the present invention, the first output gear is connected to a first output shaft having an output end;

the second output gear and the fourth output gear are respectively connected with a second output shaft and a third output shaft which are both provided with two output ends;

the third output gear is connected with a fourth output shaft having an output end.

According to the utility model discloses an aspect, the second output shaft with the output of third output shaft all is provided with the spline groove.

According to an aspect of the present invention, the input gear is perpendicular to the axis of the first conversion gear, and is a bevel gear.

According to one aspect of the utility model, the utility model also comprises a shell, the shell comprises a front cover and a rear cover, the oil pump is arranged on the rear cover;

one end of the front cover, which is far away from the rear cover, is provided with a lubricating oil inlet hole and a hydraulic oil inlet hole communicated with the oil duct;

an oil unloading hole is further formed in one end, far away from the lubricating oil inlet hole, of the front cover, a bolt head is arranged in the oil unloading hole, and a magnet is arranged on the bolt head;

one end of the rear cover, which is far away from the front cover, is provided with a lubricating oil outlet hole, and the lubricating oil outlet hole and the oil discharge hole are oppositely arranged;

and the outside of the lubricating oil outlet is connected with a filter and a radiator.

According to an aspect of the utility model, one side of input gear has the input shaft, the input of input shaft is equipped with the spline groove.

According to the inventive concept, a second switching gear is provided which is connected to the output gear set and is connected to the changeover shaft via a clutch. Therefore, whether the second conversion gear rotates along with the rotating shaft or not can be controlled by opening and closing the driving clutch, so that whether the output gear set works or not is indirectly controlled, the gearbox achieves a flexible power transmission function, and various process requirements of harvesting equipment are met.

According to one scheme of the invention, the output gear set is provided with four output gears, wherein the output shafts connected with the second output gear and the fourth output gear are respectively provided with two output ends, and the output shafts connected with the other two output gears are respectively provided with one output end, so that the gearbox realizes a one-in six-out power transmission function.

According to one aspect of the present invention, an oil supply assembly is provided in a transmission, the assembly having two switching gears for receiving and transmitting power and an oil pump. Thus, the power of the oil pump is also derived from the input power of the gearbox, so that oil can be provided to the harvesting equipment served by the gearbox. And the oil pump can also divide a part of oil to the clutch, so the opening and closing of the clutch can be controlled by controlling the oil pump.

Drawings

FIG. 1 is a schematic representation of the internal structure of a transmission according to an embodiment of the present invention;

FIG. 2 schematically illustrates an internal cross-sectional view of a transmission in accordance with an embodiment of the present invention;

FIG. 3 is a schematic representation of a block diagram of an output gearset in the transmission of one embodiment of the present invention;

FIG. 4 is a schematic representation of an external structural view of a transmission case according to an embodiment of the present invention;

fig. 5 schematically shows an axial view in cross section of a gearbox according to an embodiment of the invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship that is based on the orientation or positional relationship shown in the associated drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above-described terms should not be construed as limiting the present invention.

The present invention is described in detail below with reference to the drawings and the specific embodiments, which are not repeated herein, but the embodiments of the present invention are not limited to the following embodiments.

Referring to fig. 1, the transmission of the present invention includes an input gear 2 and an output gear set 3. Wherein, input gear 2 right end has an input shaft 21, and the right-hand member input of input shaft 21 is equipped with spline groove A for connect the transmission system in the harvesting equipment, thereby receive power. In addition, a transfer shaft 4 and a first conversion gear 5 are arranged in the gearbox, and the first conversion gear 5 is fixedly sleeved on the transfer shaft 4 and meshed with the input gear 2 so as to receive input power transmitted by the input gear. In the present embodiment, the input gear 2 and the first conversion gear 5 are both bevel gears whose axes are perpendicular, and can achieve good power transmission. According to the concept of the present invention, in order to control the output gear set 3, the first switching gear 5 is not directly connected to the output gear set 3, but a second switching gear 6, which is also sleeved on the switching shaft 4, is additionally provided to be connected to the output gear set 3. In addition, a clutch 7 is provided so that the second switching gear 6 is connected to the connecting shaft 4 via the clutch 7. Therefore, whether the second conversion gear 6 rotates along with the transfer shaft 4 or not can be controlled by controlling the opening and closing of the clutch 7, so that whether the output gear set 3 connected with the second conversion gear 6 works or not is indirectly controlled.

In addition, the present invention is provided with an oil supply assembly 8 including fourth and

fifth switching gears

81 and 82 and an oil pump 83. The fourth switching gear 81 is provided at the right end of the changeover shaft 4 such that the first switching gear 5 is located between the second switching gear 6 and the fourth switching gear 81. The fifth switching gear 82 is provided at the power input end of the oil pump 83 and meshes with the fourth switching gear 81. Thus, when the input gear 2 rotates, the first switching gear 5 and the adapting shaft 4 are driven to rotate, so as to drive the fourth switching gear 81 and the fifth switching gear 82 to rotate, and the oil pump 83 operates to transport oil. The oil output(s) of the oil pump 83 is connected to the clutch 7 so that oil can be supplied to it to effect opening and closing of the clutch 7. Of course, the oil supply assembly 8 of the present invention is not entirely present for driving the clutch 7, but may be part of the hydraulic system of the harvesting mechanism in which the gearbox is located, and can simply tap off a portion of the oil to the gearbox, thereby also facilitating control of the clutch 7. The clutch 7 is in a separated state when not receiving oil transmitted by the oil pump 83, and the output gear set 3 does not work at the moment; when the oil pump 83 supplies oil to the clutch 7, the clutch 7 can be driven to be engaged, so that the second switching gear 6 rotates along with the switching shaft 4 to drive the output gear set 3 to start working. The above-mentioned "disengagement" and "engagement" are both indicative of whether the clutch can transmit power, and are not specific to disengagement or engagement of the clutch itself.

Referring to fig. 2, the clutch 7 in the present invention includes a driving portion 71, a driven portion 72, and a pressing plate 73. The driving part 71 is fixedly sleeved on the transfer shaft 4, and the driven part 72 is rotatably connected with the driving part 71. Specifically, the driven part 72 is connected to the driving part 71 through a bearing, and an end of the driven part 72 away from the driving part 71 is also supported in the transmission case through a bearing. The driven part 72 has a connecting part 722 on an outer side of one end thereof close to the driving part 71, and the second switching gear 6 is fixed to the connecting part 722 by a screw. The driven part 72 is provided with an oil passage 721, and the pressing piece 73 is movably arranged between the driving part 71 and the driven part 72 and is arranged at the oil outlet end of the oil passage 721. A clutch plate 711 is provided outside the driving portion 71. A baffle 723 is arranged on the outer side of one end of the driven part 72 close to the driving part 71, and a belleville spring 712 is arranged between the baffle 723 and the pressing sheet 73. The oil passage 721 of the driven portion 72 is connected to the oil output end of the oil pump 83, and during the oil supply of the oil pump 83 to the clutch 7, the oil is introduced into the oil passage 721 to push the pressing plate 73 to move toward the clutch plate 711. During this period, the belleville spring 712 is continuously compressed by the pressing plate 73, and when the pressing plate 73 contacts and presses the clutch plate 711, the power of the driving part 71 and the driven part 72 of the clutch 7 can be transmitted through friction force, so that the second switching gear 6 can rotate along with the rotation of the adapter shaft 4, and the whole output gear set 3 is driven to operate. When the harvesting equipment does not need the output gear set 3 to operate, the oil pump 83 can be controlled to stop supplying oil to the clutch 7, and after the oil is stopped to be supplied, the butterfly spring 712 can push the pressing sheet 73 back to the original position, so that the power transmission of the driving part 71 and the driven part 72 is cut off, and the output gear set 3 returns to the stop state.

Referring to fig. 3, the output gear set 3 includes a first output gear 31, a third switching gear 32, and a second output gear 33, which are engaged with the second switching gear 6, and are directly driven by the second switching gear 6. Further, the third switching gear 32 is meshed with a third output gear 34 and a fourth output gear 35. Thus, the second switching gear 6 can directly transmit power to the first output gear 31 and the second output gear 33, and indirectly transmit power to the third output gear 34 and the fourth output gear 35 through the third switching gear 32. A first output shaft 36 having an output end is connected to the first output gear 31. To the second output gear 33 and the fourth output gear 35, a second output shaft 37 and a third output shaft 38 each having two output ends are connected, respectively. The output ends of the second output shaft 37 and the third output shaft 38 are also provided with spline grooves B. A fourth output shaft 39 having one output is connected to the third output gear 34. Therefore, the gearbox provided by the invention has one input end and six output ends, so that the equipment which can be driven by the gearbox to operate is richer.

Referring to fig. 4, the transmission of the present invention further comprises a housing 1, and the housing 1 comprises a front cover 11 and a rear cover 12, which are connected by screws. Most of the above components in the transmission are located in the housing 1, and the oil pump 83 in the oil supply unit 8 is mounted on the rear cover 12, i.e., outside the housing 1. Of course, the housing 1 is not a completely closed structure, and is provided with openings for connecting the input/output shafts to external devices. In addition, since the clutch needs to be connected to the connecting oil pump 83, the end of the front cover 11 away from the rear cover 12 is further provided with a hydraulic oil inlet 112, so that the oil supplied by the oil pump 83 can enter the oil passage of the clutch located inside the housing 1.

Referring to fig. 5, the front cover 11 is further provided with a corresponding lubricant oil inlet hole 111 near the hydraulic oil inlet hole 112. The end of the front cover 11 far away from the lubricating oil inlet hole 111 is also provided with an oil discharging hole 113, the hole is a hole for replacing lubricating oil and overhauling oil discharge, a bolt head 114 is arranged in the oil discharging hole 113, and a magnet is arranged on the bolt head 114, so that iron filings can be adsorbed. One end of the rear cover 12 far away from the front cover 11 is provided with a lubricating oil outlet hole 121, and the lubricating oil outlet hole 121 is opposite to the oil discharge hole 113. The lubricating oil outlet 121 external connection has the radiator, still is connected with the filter before the radiator to can not block up when guaranteeing the heat dissipation. Thus, the lubricating oil enters from the lubricating oil inlet hole 111, rises from the position of the disc spring after rotating around the shaft, flows through the position of the clutch plate and finally flows out from the lubricating oil outlet hole 121. In the running process of each gear in the gearbox, the bearing can also be transported along with the gear to generate heat, so the circulating lubricating oil system arranged according to the above can keep the lubricating oil liquid level at the optimal lubricating position all the time, the iron filings generated in the running process can be cleared by the external filter connected outside the gearbox and the magnet on the bolt head of the built-in oil unloading hole, the radiator connected at the rear end of the external filter can ensure that the lubricating oil is kept at the optimal temperature all the time, the reason is that the lubricating oil temperature is too high, so that the oil film of the bearing of the unit can be thinned, the temperature of the bearing bush is increased, the oil temperature is too low, so that the oil viscosity is increased, and the oil film becomes thick, so that the lubricating effect of the bearing is reduced.

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and it is apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a gearbox, includes input gear (2), output gear group (3), switching axle (4) and first change gear (5), first change gear (5) fixed cover is established on switching axle (4), and with input gear (2) meshing, its characterized in that still includes second change gear (6) and clutch (7), second change gear (6) cover is located switching axle (4), and pass through clutch (7) with switching axle (4) are connected, second change gear (6) still with output gear group (3) are connected.

2. The gearbox according to claim 1, characterised in that the clutch (7) comprises a driving part (71), a driven part (72) and a pressure plate (73);

the driving part (71) is fixedly sleeved on the transfer shaft (4), and the driven part (72) is rotatably connected with the driving part (71);

a connecting part (722) is arranged on the outer side of one end, close to the driving part (71), of the driven part (72), and the second conversion gear (6) is fixed on the connecting part (722);

the driven part (72) is provided with an oil channel (721), and the pressing sheet (73) is movably arranged between the driving part (71) and the driven part (72) and is positioned at an oil outlet end of the oil channel (721).

3. A gearbox according to claim 2, characterised in that the outside of the active part (71) is provided with a clutch plate (711);

a baffle (723) is arranged on the outer side of one end, close to the driving part (71), of the driven part (72), and a belleville spring (712) is arranged between the baffle (723) and the pressing piece (73).

4. A gearbox according to claim 2 or 3, further comprising an oil feed assembly (8), said oil feed assembly (8) comprising intermeshing fourth and fifth transfer gears (81,82) and an oil pump (83);

a fourth conversion gear (81) is arranged on the transfer shaft (4), and a fifth conversion gear (82) is arranged at the power input end of the oil pump (83);

and an oil output end of the oil pump (83) is connected with the oil passage (721).

5. A gearbox according to claim 4, characterised in that the output gearset (3) comprises a first output gear (31), a third conversion gear (32) and a second output gear (33) which mesh with the second conversion gear (6);

the third conversion gear (32) is also meshed with a third output gear (34) and a fourth output gear (35).

6. A gearbox according to claim 5, characterised in that a first output shaft (36) having an output is connected to the first output gear (31);

the second output gear (33) and the fourth output gear (35) are respectively connected with a second output shaft (37) and a third output shaft (38) which are both provided with two output ends;

the third output gear (34) is connected to a fourth output shaft (39) having an output.

7. A gearbox according to claim 6, characterised in that the output ends of the second output shaft (37) and the third output shaft (38) are each provided with a splined groove.

8. Gearbox according to claim 1, characterised in that the input gear (2) and the first transfer gear (5) have perpendicular axes and are both bevel gears.

9. The gearbox according to claim 6, characterized by further comprising a housing (1), the housing (1) comprising a front cover (11) and a rear cover (12), the oil pump (83) being mounted on the rear cover (12);

one end of the front cover (11) far away from the rear cover (12) is provided with a lubricating oil inlet hole (111) and a hydraulic oil inlet hole (112) communicated with the oil duct (721);

an oil unloading hole (113) is further formed in one end, far away from the lubricating oil inlet hole (111), of the front cover (11), a bolt head (114) is arranged in the oil unloading hole (113), and a magnet is arranged on the bolt head (114);

one end, far away from the front cover (11), of the rear cover (12) is provided with a lubricating oil outlet hole (121), and the lubricating oil outlet hole (121) is opposite to the oil unloading hole (113);

and a filter and a radiator are connected to the outside of the lubricating oil outlet (121).

10. A gearbox according to claim 9, characterised in that one side of the input gear (2) has an input shaft (21), the input end of the input shaft (21) being provided with a splined groove.