CN214404546U

CN214404546U - Positive and negative rotation integrated disc type hay cutter gearbox

Info

Publication number: CN214404546U
Application number: CN202120104680.7U
Authority: CN
Inventors: 王仁富; 孙本珠; 于妍
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-10-15
Anticipated expiration: 2031-01-15

Abstract

The utility model belongs to hay cutter accessory field, specifically speaking are positive and negative integrative disc type hay cutter gearbox of changeing, including the gearbox box and install input shaft, transmission shaft and the output shaft in the gearbox box, the transmission shaft drives the output shaft through the gear train that convertible transmission speed kept off the position and rotates, is equipped with bevel gear B and bevel gear C and adapter sleeve on the transmission shaft on bevel gear A, the input shaft. The connecting sleeve is shifted to be respectively connected with the bevel gear B or the bevel gear C, so that the steering directions of the transmission shaft, the output shaft and the grass roller are changed. The utility model discloses a bevel gear B and bevel gear C, adapter sleeve and adapter sleeve striking gear's that set up on the bevel gear A that sets up on the transmission shaft, the input shaft cooperation setting, can make the grass roll and go on reversing and lift the grass off when the grass of disc type hay cutter rolls takes place to twine the grass, remove the grass of twining fast, can realize two kinds of functions of variable speed and diversion, simple structure, installation easy maintenance, convenient operation, low in manufacturing cost.

Description

Positive and negative rotation integrated disc type hay cutter gearbox

Technical Field

The utility model belongs to hay cutter accessory field, specifically speaking are integrative disc type hay cutter gearbox of positive and negative rotation.

Background

In the agricultural machinery industry, in the process of grass cutting of the disc type grass cutter at present, grass is easily wound on a grass roller, and then the grass cutting operation of the disc type grass cutter is influenced.

SUMMERY OF THE UTILITY MODEL

To the problem, an object of the utility model is to provide an integrative disc type hay cutter gearbox just reverses.

The purpose of the utility model is realized through the following technical scheme:

a positive and negative rotation integrated disc type hay cutter gearbox comprises a gearbox body, a gearbox cover, an input shaft, a transmission shaft and an output shaft, wherein the input shaft, the transmission shaft and the output shaft are respectively arranged in the gearbox body; a connecting sleeve is arranged on the input shaft between the bevel gear B and the bevel gear C, the connecting sleeve is driven to rotate by the input shaft and has a degree of freedom for axially reciprocating along the input shaft, two ends of the connecting sleeve can be respectively connected with the bevel gear B or the bevel gear C, and a connecting sleeve shifting device for shifting the connecting sleeve to axially reciprocate along the input shaft is arranged on a gearbox cover;

when the connecting sleeve is connected with the bevel gear B, the input shaft drives the bevel gear B to rotate together with the connecting sleeve through the connecting sleeve, the bevel gear B drives the bevel gear A and the transmission shaft to rotate together in a forward direction or a reverse direction, and the bevel gear A drives the bevel gear C to idle on the input shaft; when the connecting sleeve is connected with the bevel gear C, the input shaft drives the bevel gear C and the connecting sleeve to rotate together through the connecting sleeve, the bevel gear C drives the bevel gear A and the transmission shaft to rotate together in a reverse direction or a forward direction, and the bevel gear A drives the bevel gear B to idle on the input shaft.

The connecting sleeve is connected with the input shaft through a key and moves on the input shaft in a reciprocating mode along the axial direction of the input shaft, inserting protrusions are arranged at two ends of the connecting sleeve respectively, and inserting grooves matched with the inserting protrusions at two ends of the connecting sleeve are arranged on the bevel gear B and the bevel gear C respectively.

The connecting sleeve is provided with a shifting block A insertion groove; the connecting sleeve shifting device comprises an adjusting handle A, a spring A, a ball A, a rotating pin A, a connecting arm A, a transmission pin A and a shifting block A, wherein the rotating pin A penetrates through the gearbox cover, one end of the rotating pin A, which is positioned on the inner side of the gearbox cover, is connected with one end of the connecting arm A, the transmission pin A is arranged at the other end of the connecting arm A, the shifting block A is arranged on the transmission pin A and has a degree of freedom of rotating relative to the transmission pin A, and the shifting block A is inserted into the shifting block A insertion groove;

the utility model discloses a gearbox case lid, including pivot pin A, adjusting handle A, mounting hole A, spring A, adjusting screw A, other end will ball A compresses tightly on the surface of gearbox case lid, pivot pin A is located the one end in the gearbox case lid outside with adjusting handle A's one end is connected, adjusting handle A's middle part is equipped with mounting hole A, mounting hole A threaded connection has adjusting screw A, spring A set up in mounting hole A, just spring A's one end with adjusting screw A butt, the other end will ball A compresses tightly on the surface of gearbox case lid.

The rotating pin A is connected with one end of the adjusting handle A through a transverse fixing pin A.

The outer surface of the gearbox cover is provided with three positioning grooves A matched with the balls A; when the adjusting handle A is rotated to enable the balls A to roll into the three positioning grooves A respectively, the shifting block A drives the connecting sleeve to be connected with the bevel gear B, or the connecting sleeve is separated from the bevel gear B and the bevel gear C, or the connecting sleeve is connected with the bevel gear C.

The gear train of convertible transmission speed fender position includes gear A, gear B and gear sleeve, gear A with gear B respectively with the transmission shaft key-type connection, the gear sleeve with the output shaft key-type connection and have the edge output shaft axial reciprocating motion's degree of freedom, the both ends of gear sleeve are equipped with gear teeth portion A and gear teeth portion B respectively, gear A can with gear teeth portion A meshes mutually, gear B can with gear teeth portion B meshes mutually, be equipped with on the gearbox case lid and stir the gear sleeve is followed output shaft axial reciprocating motion's gear sleeve striking gear.

A shifting block B insertion groove is formed in the gear sleeve between the gear tooth part A and the gear tooth part B; the connecting sleeve shifting device comprises an adjusting handle B, a spring B, a ball B, a rotating pin B, a connecting arm B, a transmission pin B and a shifting block B; the rotating pin B penetrates through the gearbox cover, one end, located on the inner side of the gearbox cover, of the rotating pin B is connected with one end of the connecting arm B, the transmission pin B is arranged at the other end of the connecting arm B, the shifting block B is arranged on the transmission pin B and has a degree of freedom of rotating relative to the transmission pin B, and the shifting block B is inserted into the shifting block B insertion groove;

the rotating pin B is located one end of the outer side of the gearbox case cover is connected with one end of the adjusting handle B, a mounting hole B is formed in the middle of the adjusting handle B, the mounting hole B is in threaded connection with an adjusting screw B, the spring B is arranged in the mounting hole B, one end of the spring B is abutted to the adjusting screw B, and the other end of the spring B compresses the ball B tightly on the outer surface of the gearbox case cover.

The rotating pin B is connected with one end of the adjusting handle B through a transverse fixing pin B.

Three positioning grooves B matched with the balls B are formed in the outer surface of the gearbox cover; when the adjusting handle B is rotated to enable the balls B to roll into the three positioning grooves B respectively, the shifting block B drives the gear sleeve to move axially along the output shaft, and then the gear A is meshed with the gear tooth part A, or the gear sleeve is separated from the gear A and the gear B, or the gear B is meshed with the gear tooth part B.

The utility model discloses an advantage does with positive effect:

the utility model discloses a bevel gear B that sets up on bevel gear A, the input shaft that set up on the transmission shaft sets up with bevel gear C, adapter sleeve and adapter sleeve striking gear's cooperation, can make the grass roll and carry out the reversal and lift the grass off when the grass of disc type hay cutter rolls takes place to twine the grass, removes fast and twines the grass. The utility model discloses can realize two kinds of functions of variable speed and diversion, simple structure, installation easy maintenance, convenient operation, low in manufacturing cost.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a schematic view of the structure of the gearbox cover of the present invention;

fig. 3 is a schematic structural view of the connecting sleeve shifting device and the gear sleeve shifting device of the present invention;

FIG. 4 is an enlarged view of FIG. 3 at A;

fig. 5 is an enlarged view of fig. 3 at B.

In the figure: 1-gearbox box body, 2-input shaft, 3-transmission shaft, 4-output shaft, 501-gear A, 502-gear B, 503-gear sleeve, 5031-gear tooth part A, 5032-gear tooth part B, 5033-shifting block B insertion groove, 6-bevel gear A, 7-bevel gear B, 8-bevel gear C, 9-connection sleeve, 901-shifting block A insertion groove, 10-gearbox box cover, 11-adjusting handle A, 12-spring A, 13-ball A, 14-rotating pin A, 15-connection arm A, 16-transmission pin A, 17-shifting block A, 18-adjusting screw A, 19-transverse fixing pin A, 20-positioning groove A, 21-adjusting handle B, 22-spring B, 23-ball B, 24-rotating pin B, 25-connecting arm B, 26-driving pin B, 27-shifting block B, 28-adjusting screw B, 29-transverse fixing pin B, 30-positioning groove B.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-5.

A positive and negative rotation integrated disc type hay cutter gearbox comprises a gearbox body 1, a gearbox cover 10, an input shaft 2, a transmission shaft 3 and an output shaft 4 which are respectively arranged in the gearbox body 1, wherein the input shaft 2 drives the transmission shaft 3 to rotate, the transmission shaft 3 drives the output shaft 4 to rotate through a gear set with a changeable transmission speed gear, in the embodiment, one end of the input shaft 2 extends out of the gearbox body 1 to be provided with an input gear, and is connected with the power source of the disc type hay cutter through an input gear, one end of an output shaft 4 extends out of the gearbox body 1 and is connected with the hay roller of the disc type hay cutter, the connection mode of the input shaft 2 and the power source of the disc type hay cutter and the connection mode of the output shaft 4 and the grass roller of the disc type hay cutter adopt the prior art, and the arrangement structure of the gear set with the changeable transmission speed gear can adopt the prior art; the transmission shaft 3 is provided with a bevel gear A6, the input shaft 2 is respectively provided with a bevel gear B7 and a bevel gear C8 which can rotate relative to the input shaft 2, in the embodiment, the bevel gear B7 realizes axial positioning through a shaft shoulder arranged on the input shaft 2, the bevel gear C8 realizes axial positioning through a gasket arranged on the input shaft 2, the bevel gear B7 and the bevel gear C8 are respectively meshed with the bevel gear A6, the input shaft 2 between the bevel gear B7 and the bevel gear C8 is provided with a connecting sleeve 9, the connecting sleeve 9 is driven to rotate through the input shaft 2 and has freedom of axial reciprocating movement along the input shaft 2, two ends of the connecting sleeve 9 can be respectively connected with the bevel gear B7 or the bevel gear C8, and the gearbox cover 10 is provided with a connecting sleeve shifting device for shifting the connecting sleeve 9 to axially reciprocate along the input shaft 2.

When the connecting sleeve 9 is connected with the bevel gear B7, the input shaft 2 drives the connecting sleeve 9 and the bevel gear B7 to rotate together, the bevel gear B7 drives the bevel gear A6 and the transmission shaft 3 to rotate together in the forward direction, and the bevel gear A6 drives the bevel gear C8 to idle on the input shaft 2; when the connecting sleeve 9 is connected with the bevel gear C8, the input shaft 2 drives the connecting sleeve 9 and the bevel gear C8 to rotate together, the bevel gear C8 drives the bevel gear A6 and the transmission shaft 3 to rotate together in the opposite direction, and the bevel gear A6 drives the bevel gear B7 to idle on the input shaft 2.

Specifically, the connecting sleeve 9 is keyed with the input shaft 2 and reciprocates on the input shaft 2 along the axial direction of the input shaft 2, two ends of the connecting sleeve 9 are respectively provided with an inserting projection, and the bevel gear B7 and the bevel gear C8 are respectively provided with an inserting groove matched with the inserting projections at two ends of the connecting sleeve 9. The matching arrangement of the plugging bulge and the plugging groove is convenient for connecting the connecting sleeve 9 with the bevel gear B7 or the bevel gear C8 respectively.

Specifically, the connecting sleeve 9 is provided with a shifting block a insertion groove 901; as shown in fig. 3 and 4, the connecting sleeve shifting device comprises an adjusting handle a11, a spring a12, a ball a13, a rotating pin a14, a connecting arm a15, a driving pin a16 and a shifting block a 17; the rotating pin A14 penetrates through the gearbox case cover 10, one end of the rotating pin A14, which is located on the inner side of the gearbox case cover 10, is connected with one end of the connecting arm A15, the rotating pin A14 is connected with one end of the adjusting handle A11 through the transverse fixing pin A19, the driving pin A16 is arranged at the other end of the connecting arm A15, the shifting block A17 is arranged on the driving pin A16 and has the freedom of rotating relative to the driving pin A16, and the shifting block A17 is inserted into the shifting block A insertion groove 901. The rotating adjusting handle A11 drives the shifting block A17 to move sequentially through the rotating pin A14, the connecting arm A15 and the transmission pin A16, and then the shifting block A17 inserted into the shifting block A insertion groove 901 shifts the connecting sleeve 9 to move.

One end of the rotating pin A14, which is located on the outer side of the gearbox case cover 10, is connected with one end of an adjusting handle A11, a mounting hole A is formed in the middle of the adjusting handle A11, an adjusting screw A18 is connected with the mounting hole A in a threaded mode, a spring A12 is arranged in the mounting hole A, one end of a spring A12 is abutted to the adjusting screw A18, and the other end of the spring A13 is pressed on the outer surface of the gearbox case cover 10. The adjustment screw a18 is used to adjust the compression force of the spring a 12. As shown in fig. 3, the outer surface of the transmission case cover 10 is provided with three positioning grooves a20 which are engaged with the balls a 13. When the adjusting handle A11 is rotated to enable the balls A13 to roll into the three positioning grooves A20 respectively, the shifting block A17 drives the connecting sleeve 9 to be connected with the bevel gear B7, or the connecting sleeve 9 is separated from the bevel gear B7 and the bevel gear C8, or the connecting sleeve 9 is connected with the bevel gear C8, so that the effect of changing the steering direction of the output shaft 4 is achieved.

Specifically, as shown in fig. 3 and fig. 5, in this embodiment, the gear set capable of changing the transmission speed gear includes a gear a501, a gear B502, and a gear sleeve 503, the gear a501 and the gear B502 are respectively keyed with a transmission shaft 3, the gear sleeve 503 is keyed with an output shaft 4 and has a degree of freedom of reciprocating along the axial direction of the output shaft 4, two ends of the gear sleeve 503 are respectively provided with a gear tooth portion a5031 and a gear tooth portion B5032, a shifting block B insertion slot 5033 is provided on the gear sleeve 503 between the gear tooth portion a5031 and the gear tooth portion B5032, the gear a501 is capable of meshing with the gear tooth portion a5031, the gear B502 is capable of meshing with the gear tooth portion B5032, a transmission ratio between the gear a501 and the gear tooth portion a5031 is different from a transmission ratio between the gear B502 and the gear tooth portion B5032, and a gear sleeve toggle device for toggling the gear sleeve 503 to reciprocate along the axial direction of the output shaft 4 is provided on the transmission case cover 10.

The connecting sleeve shifting device in the embodiment comprises an adjusting handle B21, a spring B22, a ball B23, a rotating pin B24, a connecting arm B25, a transmission pin B26 and a shifting block B27; the rotating pin B24 penetrates through the gearbox case cover 10, one end of the rotating pin B24, which is positioned on the inner side of the gearbox case cover 10, is connected with one end of the connecting arm B25, the rotating pin B24 is connected with one end of the adjusting handle B21 through a transverse fixing pin B29, the driving pin B26 is arranged at the other end of the connecting arm B25, the shifting block B27 is arranged on the driving pin B26 and has the freedom of rotating relative to the driving pin B26, and the shifting block B27 is inserted into the shifting block B insertion groove 5033. The rotation adjusting handle B21 drives the shifting block B27 to move sequentially through the rotation pin B24, the connecting arm B25 and the transmission pin B26, so that the shifting block B27 inserted into the shifting block B insertion groove 5033 shifts the gear sleeve 503 to move.

One end of the rotating pin B24, which is located on the outer side of the gearbox case cover 10, is connected with one end of an adjusting handle B21, the middle of the adjusting handle B21 is provided with a mounting hole B, the mounting hole B is in threaded connection with an adjusting screw B28, a spring B22 is arranged in the mounting hole B, one end of a spring B22 is abutted to the adjusting screw B28, and the other end of the spring B22 compresses a ball B23 on the outer surface of the gearbox case cover 10. The adjusting screw B28 is used to adjust the compression force of the spring B22. As shown in fig. 3, three positioning grooves B30 are provided on the outer surface of the transmission case cover 10 to engage with the balls B23. When the adjusting handle B21 is rotated to make the balls B23 roll into the three positioning slots B30, respectively, the shifting block B27 drives the gear sleeve 503 to move axially along the output shaft 4, so as to make the gear a501 engage with the gear tooth portion a5031, or make the gear sleeve 503 separate from the gear a501 and the gear B502, or make the gear B502 engage with the gear tooth portion B5032, thereby achieving the effect of changing the rotation speed of the output shaft 4.

The working principle is as follows:

when the grass cutter is used, the connecting sleeve 9 is connected with the bevel gear B7, the input shaft 2 drives the connecting sleeve 9 and the bevel gear B7 to rotate together, the bevel gear B7 drives the bevel gear A6 and the transmission shaft 3 to rotate together in the forward direction, the output shaft 4 further drives the grass roller of the disc type grass cutter to normally carry out grass cutting operation, and the bevel gear A6 drives the bevel gear C8 to idle on the input shaft 2; when grass is wound on a grass roller of the disc type hay cutter, the connecting sleeve 9 is connected with the bevel gear C8, the input shaft 2 drives the connecting sleeve 9 and the bevel gear C8 to rotate together, the bevel gear C8 drives the bevel gear A6 and the transmission shaft 3 to rotate together in a reverse direction, the grass roller of the disc type hay cutter is rotated reversely to discharge the grass, and the bevel gear A6 drives the bevel gear B7 to idle on the input shaft 2; after the grass rolls and contacts the grass winding condition, the restoring connecting sleeve 9 is connected with the bevel gear B7.

Claims

1. The utility model provides a positive reverse integrative disc type hay cutter gearbox, includes gearbox box (1), gearbox case lid (10) and installs input shaft (2), transmission shaft (3) and output shaft (4) in gearbox box (1) respectively, input shaft (2) drive transmission shaft (3) rotate, transmission shaft (3) drive through the gear train of convertible transmission speed fender position output shaft (4) rotate its characterized in that: a bevel gear A (6) is arranged on the transmission shaft (3), a bevel gear B (7) and a bevel gear C (8) which can rotate relative to the input shaft (2) are respectively arranged on the input shaft (2), and the bevel gear B (7) and the bevel gear C (8) are respectively meshed with the bevel gear A (6); a connecting sleeve (9) is arranged on the input shaft (2) between the bevel gear B (7) and the bevel gear C (8), the connecting sleeve (9) is driven to rotate by the input shaft (2) and has freedom degree of axial reciprocating movement along the input shaft (2), two ends of the connecting sleeve (9) can be respectively connected with the bevel gear B (7) or the bevel gear C (8), and a connecting sleeve shifting device for shifting the connecting sleeve (9) to axially reciprocate along the input shaft (2) is arranged on the gearbox cover (10);

when the connecting sleeve (9) is connected with the bevel gear B (7), the input shaft (2) drives the bevel gear B (7) to rotate together with the connecting sleeve (9) through the connecting sleeve (9), the bevel gear B (7) drives the bevel gear A (6) and the transmission shaft (3) to rotate together in the forward direction or the reverse direction, and the bevel gear A (6) drives the bevel gear C (8) to idle on the input shaft (2); when the connecting sleeve (9) is connected with the bevel gear C (8), the input shaft (2) drives the bevel gear C (8) to rotate together with the connecting sleeve (9) through the connecting sleeve (9), the bevel gear C (8) drives the bevel gear A (6) and the transmission shaft (3) to rotate in a reverse direction or a forward direction together, and the bevel gear A (6) drives the bevel gear B (7) to idle on the input shaft (2).

2. The positive and negative rotation integrated disc type hay cutter gearbox of claim 1, characterized in that: the connecting sleeve (9) is in key connection with the input shaft (2) and moves back and forth on the input shaft (2) along the axial direction of the input shaft (2), the two ends of the connecting sleeve (9) are respectively provided with a splicing bulge, and the bevel gear B (7) and the bevel gear C (8) are respectively provided with a splicing groove which is matched with the splicing bulges at the two ends of the connecting sleeve (9).

3. The positive and negative rotation integrated disc type hay cutter gearbox of claim 1, characterized in that: the connecting sleeve (9) is provided with a shifting block A insertion groove (901); the connecting sleeve shifting device comprises an adjusting handle A (11), a spring A (12), a ball A (13), a rotating pin A (14), a connecting arm A (15), a transmission pin A (16) and a shifting block A (17), wherein the rotating pin A (14) penetrates through the gearbox case cover (10), one end, located on the inner side of the gearbox case cover (10), of the rotating pin A (14) is connected with one end of the connecting arm A (15), the transmission pin A (16) is arranged at the other end of the connecting arm A (15), the shifting block A (17) is arranged on the transmission pin A (16) and has a degree of freedom rotating relative to the transmission pin A (16), and the shifting block A (17) is inserted into the shifting block A insertion groove (901);

the pivot pin A (14) is located the one end in gearbox case lid (10) outside with the one end of adjustment handle A (11) is connected, the middle part of adjustment handle A (11) is equipped with mounting hole A, mounting hole A threaded connection has adjusting screw A (18), spring A (12) set up in the mounting hole A, just the one end of spring A (12) with adjusting screw A (18) butt, the other end will ball A (13) compress tightly on the surface of gearbox case lid (10).

4. The positive and negative rotation integrated disc type hay cutter gearbox of claim 3, characterized in that: the rotating pin A (14) is connected with one end of the adjusting handle A (11) through a transverse fixing pin A (19).

5. The positive and negative rotation integrated disc type hay cutter gearbox of claim 3, characterized in that: the outer surface of the gearbox cover (10) is provided with three positioning grooves A (20) matched with the balls A (13); when the adjusting handle A (11) is rotated to enable the balls A (13) to roll into the three positioning grooves A (20) respectively, the shifting block A (17) drives the connecting sleeve (9) to be connected with the bevel gear B (7), or the connecting sleeve (9) is separated from the bevel gear B (7) and the bevel gear C (8), or the connecting sleeve (9) is connected with the bevel gear C (8).

6. The positive and negative rotation integrated disc type hay cutter gearbox of claim 1, characterized in that: the gear set capable of changing the transmission speed gear comprises a gear A (501), a gear B (502) and a gear sleeve (503), wherein the gear A (501) and the gear B (502) are respectively connected with a transmission shaft (3) in a key mode, the gear sleeve (503) is connected with an output shaft (4) in a key mode and has a degree of freedom along the axial reciprocating movement of the output shaft (4), gear teeth A (5031) and gear teeth B (5032) are respectively arranged at two ends of the gear sleeve (503), the gear A (501) can be meshed with the gear teeth A (5031), the gear B (502) can be meshed with the gear teeth B (5032), and a gear sleeve shifting device for shifting the gear sleeve (503) along the axial reciprocating movement of the output shaft (4) is arranged on a gearbox cover (10).

7. The positive and negative rotation integrated disc type hay cutter gearbox of claim 6, characterized in that: a shifting block B insertion groove (5033) is formed in the gear sleeve (503) between the gear tooth part A (5031) and the gear tooth part B (5032); the connecting sleeve shifting device comprises an adjusting handle B (21), a spring B (22), a ball B (23), a rotating pin B (24), a connecting arm B (25), a transmission pin B (26) and a shifting block B (27); the rotating pin B (24) penetrates through the gearbox case cover (10), one end, located on the inner side of the gearbox case cover (10), of the rotating pin B (24) is connected with one end of the connecting arm B (25), the driving pin B (26) is arranged at the other end of the connecting arm B (25), the shifting block B (27) is arranged on the driving pin B (26) and has the freedom degree of rotating relative to the driving pin B (26), and the shifting block B (27) is inserted into the shifting block B insertion groove (5033);

the pivot pin B (24) are located the one end in gearbox case lid (10) outside with the one end of adjustment handle B (21) is connected, the middle part of adjustment handle B (21) is equipped with mounting hole B, mounting hole B threaded connection has adjusting screw B (28), spring B (22) set up in the mounting hole B, just the one end of spring B (22) with adjusting screw B (28) butt, the other end will ball B (23) compress tightly on the surface of gearbox case lid (10).

8. The positive and negative rotation integrated disc type hay cutter gearbox of claim 7, characterized in that: the rotating pin B (24) is connected with one end of the adjusting handle B (21) through a transverse fixing pin B (29).

9. The positive and negative rotation integrated disc type hay cutter gearbox of claim 7, characterized in that: three positioning grooves B (30) matched with the balls B (23) are formed in the outer surface of the gearbox cover (10); when the adjusting handle B (21) is rotated to enable the balls B (23) to roll into the three positioning grooves B (30) respectively, the shifting block B (27) drives the gear sleeve (503) to move axially along the output shaft (4), and then the gear A (501) is meshed with the gear tooth part A (5031), or the gear sleeve (503) is separated from the gear A (501) and the gear B (502), or the gear B (502) is meshed with the gear tooth part B (5032).