Transmission case of field management machine

Abstract

The utility model provides a field management machine transmission case which comprises a shell and a transmission system, the shell comprises a transmission installation part and an end cover, the transmission system comprises a power input shaft, a transmission shaft set, a power output shaft set and a shifting fork assembly, and the power input shaft is in transmission connection with the power output shaft through the transmission shaft set; through innovative double-circuit independent output control, multi-gear transmission chain design, compact and efficient gear shaft system layout and a reliable tail end direct drive clutch structure, the operation flexibility, working condition adaptability, operation convenience and transmission reliability of the field management machine are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of traditional components of garden tillers, specifically to the transmission box of a garden tiller. Background Technology

[0002] As an important type of agricultural machinery, the transmission box of a garden tiller is the core component for power transmission and distribution, directly affecting the machine's operating efficiency, operational flexibility, and applicability. Traditional garden tiller transmission boxes typically suffer from the following structural design deficiencies:

[0003] Limited output modes and poor flexibility: Traditional transmissions are often equipped with only a single power output shaft, or although they have multiple outputs, they lack independent and flexible clutch control. This makes operation inconvenient and adaptable when driving different agricultural implements (such as rotary tillage, ditching, weeding, etc.) or performing different operating modes (such as single-sided drive, double-sided synchronous drive, double-sided differential drive), and cannot efficiently meet the complex and ever-changing needs of field operations.

[0004] Limited gear ratios and insufficient adaptability: Some traditional transmissions have relatively simple transmission structures, offering only a limited number of gears (especially forward and reverse). This limits the machine's ability to match speeds under different soil conditions and operating loads, affecting work efficiency and effectiveness, especially when delicate operation or heavy-duty work is required.

[0005] Complex or inefficient transmission structure: In order to achieve limited output and speed change functions, some traditional transmission boxes may adopt an overly complex or insufficiently compact gear and shaft layout, resulting in a bulky structure, high manufacturing cost, difficult maintenance, and may increase power loss during transmission.

[0006] Inconvenient clutch operation: For clutch control with multiple outputs, traditional designs may use a linkage mechanism or a single shift fork to control multiple outputs, resulting in insufficiently direct and independent operation, making it difficult to achieve precise separation and engagement of the outputs, and affecting the convenience and reliability of work switching.

[0007] Therefore, there is an urgent need for a garden management machine transmission box that is compact in structure, has high transmission efficiency, and can provide multiple independent and controllable output modes and a wide range of gear selections, in order to improve the machine's operating performance, ease of operation, and applicability. Utility Model Content

[0008] The purpose of this utility model is achieved through the following technical measures: a garden tiller transmission box, including a housing and a transmission system. The housing includes a transmission mounting part and an end cover. The transmission system includes a power input shaft, a transmission shaft assembly, a power output shaft assembly, and a shift fork assembly. The power input shaft is connected to the power output shaft via the transmission shaft assembly. The power output shaft assembly includes a first output shaft and a second output shaft assembly. The second output shaft assembly includes a second output shaft one and a second output shaft two. The shift fork assembly includes a first end shift fork shaft and a second end shift fork shaft. The first end shift fork shaft is used to control the output action of the second output shaft one, and the second end shift fork shaft is used to control the output action of the second output shaft two.

[0009] As a preferred embodiment, the drive shaft assembly includes a first drive shaft, a second drive shaft, a third drive shaft, a fourth drive shaft, a fifth drive shaft, a sixth drive shaft, a seventh drive shaft, an eighth drive shaft, a ninth drive shaft, and a tenth drive shaft connected by drive rods.

[0010] As a preferred embodiment: a three-axis first gear and a three-axis second gear are mounted on the third drive shaft, and a five-axis first transmission gear set and a five-axis second transmission gear are mounted on the power input shaft. The five-axis first transmission gear set includes a five-axis transmission tooth and a five-axis transmission tooth, and the three-axis first gear and the five-axis second transmission gear are meshed together.

[0011] As a preferred embodiment: the output end of the first output shaft is located outside the housing, and the portion of the first output shaft located inside the housing is equipped with a six-axis first transmission gear set, a six-axis first transmission gear, and a six-axis third transmission gear. The six-axis first transmission gear set includes a six-axis transmission tooth, a six-axis transmission tooth, and a six-axis transmission tooth, and the five-axis transmission tooth and the six-axis transmission tooth are meshed together.

[0012] As a preferred embodiment: the seventh drive shaft is equipped with a first drive gear set, a second drive gear set, and a third drive gear set. The first drive gear set includes one tooth for the first drive gear and two teeth for the second drive gear. The third drive gear set includes one tooth for the third drive gear and two teeth for the third drive gear.

[0013] As a preferred embodiment: the eighth drive shaft is equipped with an eight-axis first drive gear, an eight-axis second drive gear, and an eight-axis third drive gear set. The eight-axis third drive gear set includes an eight-axis drive one tooth and an eight-axis drive two teeth. The eight-axis drive one tooth is meshed with the seven-axis second drive gear, and the eight-axis drive two teeth are meshed with the seven-axis third drive one tooth.

[0014] As a preferred embodiment: the ninth drive shaft is equipped with a first drive gear and a second drive gear, and the tenth drive shaft is equipped with a main drive gear, a first driven gear and a second driven gear, wherein the main drive gear is meshed with the first drive gear.

[0015] As a preferred embodiment: one end of the second output shaft is located outside the housing, and the other end of the second output shaft is located inside the housing. An output shaft drive gear is fixedly connected to the end of the second output shaft located inside the housing. The output shaft drive gear is engaged and driven by the first driven gear. The second output shaft is mirrored to the second output shaft. An output shaft drive gear is fixedly installed to the end of the second output shaft located inside the housing. The output shaft drive gear is engaged and driven by the second driven gear.

[0016] As a preferred embodiment: one end of the first end-section shift fork shaft is located inside the housing, and the other end of the first end-section shift fork shaft is located outside the housing. The end of the first end-section shift fork shaft located inside the housing is used to engage and disengage the first driven gear and the output shaft drive gear. One end of the second end-section shift fork shaft is located inside the housing, and the other end of the second end-section shift fork shaft is located outside the housing. The end of the second end-section shift fork shaft located inside the housing is used to engage and disengage the second driven gear and the output shaft drive gear.

[0017] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are:

[0018] Dual-channel independent controllable output, offering a variety of flexible operating modes:

[0019] Thanks to the second output shaft group (including the mirrored second output shaft one and the second output shaft two) and the independent first and second end shift fork shafts, this invention can achieve completely independent clutch control of the output actions of the two second output shafts.

[0020] This enables the machine to easily achieve various operating modes such as single-side drive, dual-side synchronous drive, and dual-side differential drive (achieved through an external differential mechanism), greatly expanding the adaptability of the garden tiller to different agricultural implements (such as blades placed on both sides) and different operating scenarios (such as ditching, ridging, and weeding), and the operation switching is intuitive and convenient.

[0021] Multi-speed transmission design, highly adaptable:

[0022] This invention employs a complex transmission shaft assembly consisting of up to ten transmission shafts, and utilizes the precise meshing and combination of multiple specially designed gears.

[0023] This design enables at least two forward gears (such as forward gear, forward gear) and a reverse gear (as described in the specific implementation), providing operators with a wider range of speed options. Users can easily select the appropriate gear based on soil resistance, job type (such as rotary tillage depth, walking speed), optimizing work efficiency, fuel economy, and work quality, especially adapting to the different needs of heavy-duty and precision work.

[0024] Compact and efficient structure, stable and reliable transmission:

[0025] Despite the large number of drive shafts and gears, the power transmission path is clear and compact through a reasonable shaft layout (such as each shaft being connected by a drive rod) and gear meshing design (such as one tooth of a five-axis drive meshing with one tooth of a six-axis drive, one tooth of an eight-axis drive meshing with the second drive gear of the seventh axis, and the main drive gear meshing with the first drive gear of the ninth axis, etc.).

[0026] The specific design of gear sets (such as multi-gear sets) effectively reduces the axial space occupied. This structure maintains the overall compactness of the transmission box while ensuring rich functionality (multiple gears, multiple outputs), which is beneficial to the overall layout of the machine and ensures the smoothness and reliability of power transmission.

[0027] The end-clutch operation is direct and reliable.

[0028] The first and second end shift fork shafts directly act on the first and second driven gears on the tenth transmission shaft, controlling their engagement and disengagement with the output shaft drive gear and the output shaft drive gear fixed at the end of the second output shaft.

[0029] This end-drive clutch design features direct action, rapid response, and precise control, effectively avoiding the problems of linkage lag or incomplete disengagement that may exist in traditional designs, and greatly improving the reliability and operation feel of the output clutch.

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0031] Appendix Figure 1 This is a schematic diagram of the external structure of the transmission box of the garden management machine of this utility model.

[0032] Appendix Figure 2 This is a cross-sectional schematic diagram of the internal structure of the transmission box of the garden management machine of this utility model.

[0033] Appendix Figure 3 This is a schematic diagram of the transmission system and transmission gear of this utility model.

[0034] Appendix Figure 4 This is a schematic diagram showing the position and structure of the first and second drive shafts of this utility model.

[0035] Appendix Figure 5 This is a schematic diagram showing the positional structure of the shift fork assembly, the tenth drive shaft, the main drive gear, the first driven gear, and the second driven gear of this utility model. Detailed Implementation

[0036] Example: As attached Figure 1 To be continued Figure 5 As shown, the transmission box of a garden tiller includes a housing and a transmission system. The housing includes a transmission mounting part and an end cover. The transmission system includes a power input shaft, a transmission shaft assembly, a power output shaft assembly, and a shift fork assembly. The power input shaft is connected to the power output shaft via the transmission shaft assembly. The power output shaft assembly includes a first output shaft and a second output shaft assembly. The second output shaft assembly includes a second output shaft 11.1 and a second output shaft 11.2. The shift fork assembly includes a first end shift fork shaft 12 and a second end shift fork shaft 13. The first end shift fork shaft 12 is used to control the output action of the second output shaft 11.1, and the second end shift fork shaft 13 is used to control the output action of the second output shaft 11.2.

[0037] The drive shaft assembly includes a first drive shaft 1, a second drive shaft 2, a third drive shaft 3, a fourth drive shaft 4, a fifth drive shaft 5, a sixth drive shaft 6, a seventh drive shaft 7, an eighth drive shaft 8, a ninth drive shaft 9, and a tenth drive shaft 10 connected by drive rods.

[0038] The third drive shaft 3 is equipped with a three-axis first gear 3.1 and a three-axis second gear 3.2. The power input shaft is equipped with a five-axis first transmission gear set and a five-axis second transmission gear 5.2. The five-axis first transmission gear set includes a five-axis transmission tooth 5.1.1 and a five-axis transmission tooth 5.1.2. The three-axis first gear 3.1 and the five-axis second transmission gear 5.2 are meshed together.

[0039] The output end of the first output shaft is located outside the housing. The portion of the first output shaft located inside the housing is equipped with a six-axis first transmission gear set, a six-axis first transmission gear 6.2, and a six-axis third transmission gear 6.3. The six-axis first transmission gear set includes a six-axis transmission tooth 6.1.1, a six-axis transmission tooth 6.1.2, and a six-axis transmission tooth 6.1.3. The five-axis transmission tooth 5.1.1 and the six-axis transmission tooth 6.1.1 are meshed together.

[0040] The seventh drive shaft 7 is equipped with a first drive gear set, a second drive gear set, and a third drive gear set. The first drive gear set includes a first drive tooth 7.1.1 and a second drive tooth 7.1.2. The third drive gear set includes a third drive tooth 7.3.1 and a third drive tooth 7.3.2.

[0041] The eighth drive shaft 8 is equipped with an eight-axis first drive gear 8.1, an eight-axis second drive gear 8.2, and an eight-axis third drive gear set. The eight-axis third drive gear set includes an eight-axis drive tooth 8.3.1 and an eight-axis drive tooth 8.3.2. The eight-axis drive tooth 8.3.1 is meshed with the seven-axis second drive gear 7.2, and the eight-axis drive tooth 8.3.2 is meshed with the seven-axis third drive tooth 7.3.1.

[0042] The ninth drive shaft 9 is equipped with a first drive gear 9.1 and a second drive gear 9.2. The tenth drive shaft 10 is equipped with a main drive gear 10.2, a first driven gear 10.1 and a second driven gear 10.3. The main drive gear 10.2 is meshed with the first drive gear 9.1.

[0043] One end of the second output shaft 11.1 is located outside the housing, and the other end of the second output shaft 11.1 is located inside the housing. The end of the second output shaft 11.1 located inside the housing is fixedly connected to an output shaft drive gear 11.1.1. The output shaft drive gear 11.1.1 is engaged and disengaged with the first driven gear 10.1. The second output shaft 11.2 is mirrored with the second output shaft 11.1. The end of the second output shaft 11.2 located inside the housing is fixedly installed with an output shaft drive gear 11.2.1. The output shaft drive gear 11.2.1 is engaged and disengaged with the second driven gear 10.3.

[0044] One end of the first end-section shift fork shaft 12 is located inside the housing, and the other end of the first end-section shift fork shaft 12 is located outside the housing. The end of the first end-section shift fork shaft 12 located inside the housing is used to engage the first driven gear 10.1 and the output shaft drive gear 11.1.1. One end of the second end-section shift fork shaft 13 is located inside the housing, and the other end of the second end-section shift fork shaft 13 is located outside the housing. The end of the second end-section shift fork shaft 13 located inside the housing is used to engage the second driven gear 10.3 and the output shaft drive gear 11.2.1.

[0045] The power output method of this device will now be explained as follows:

[0046] It should be noted that in the following content: (+) and (-) represent the rotation direction of the gear or shaft;

[0047] The first power output mode of the first output shaft; manipulating the first transmission shaft 1: five-axis second transmission gear 5.2(+) - three-axis first gear 3.1(-) - three-axis second gear 3.2(-) - six-axis first transmission gear 6.2(+);

[0048] The second power output mode of the first output shaft; manipulating the first transmission shaft 1: the second transmission gear of the fifth shaft 5.2 (+) - the third transmission gear of the sixth shaft 6.3 (-).

[0049] Forward gear output mode:

[0050] The output transmission mode of the first drive shaft 1 and the second output shaft 11.1 is as follows: five-axis drive one tooth 5.1.1(+) - six-axis drive one tooth 6.1.1(-) - six-axis drive three teeth 6.1.3(-) - eight-axis second drive gear 8.2(+) - eight-axis first drive gear 8.1(+) - seven-axis first drive one tooth 7.1.1(-) - seven-axis second drive gear 7.2(-) - eight-axis drive one tooth 8.3.1(+) - eight-axis drive two teeth 8.3.2(+) - seven-axis third drive one tooth 7.3.1(-) - seven-axis third drive two teeth 7.3.2(-) - nine-axis second drive gear 9.2(+) - nine-axis first drive gear 9.1(+) - main drive gear 10.2(-) - first driven gear 10.1 - output shaft drive gear 11.1.1 - second output shaft 11.1.

[0051] The output transmission mode of the first drive shaft 1 and the second output shaft 11.2 is as follows: 5-axis drive one tooth 5.1.1(+) - 6-axis drive one tooth 6.1.1(-) - 6-axis drive three teeth 6.1.3(-) - 8-axis second drive gear 8.2(+) - 8-axis first drive gear 8.1(+) - 7-axis first drive one tooth 7.1.1(-) - 7-axis second drive gear 7.2(-) - 8-axis drive one tooth 8.3.1(+) - 8-axis drive two teeth 8.3.2(+) - 7-axis third drive one tooth 7.3.1(-) - 7-axis third drive two teeth 7.3.2(-) - 9-axis second drive gear 9.2(+) - 9-axis first drive gear 9.1(+) - main drive gear 10.2(-) - second driven gear 10.3(-) - output shaft 11.2.1 - second output shaft 11.2.

[0052] Output mode with two forward gears:

[0053] Operating the second drive shaft 2 (forward gear): 5-axis drive 2 teeth 5.1.2(+) - 6-axis drive 2 teeth 6.1.2(-) - 6-axis drive 3 teeth 6.1.3(-) - 8-axis second drive gear 8.2(+) - 8-axis first drive gear 8.1(+) - 7-axis first drive 1 tooth 7.1.1(-) - 7-axis second drive gear 7.2(-) - 8-axis drive 1 tooth 8.3.1(+) - 8-axis drive 2 teeth 8.3.2(+) - 7-axis third drive 1 tooth 7.3.1(-) - 7-axis third drive 2 teeth 7.3.2(-) - 9-axis second drive gear 9.2(+) - 9-axis first drive gear 9.1(+) - main drive gear 10.2(-) - first driven gear 10.1 - output shaft drive gear 11.1.1 - second output shaft 11.1;

[0054] Operating the second drive shaft 2 (forward gear): 5-axis drive 2nd gear 5.1.2(+) - 6-axis drive 2nd gear 6.1.2(-) - 6-axis drive 3rd gear 6.1.3(-) - 8-axis second drive gear 8.2(+) - 8-axis first drive gear 8.1(+) - 7-axis first drive 1st gear 7.1.1(-) - 7-axis second drive gear 7.2(-) - 8-axis drive 1st gear 8.3.1(+) - 8-axis drive 2nd gear 8.3.2(+) - 7-axis third drive 1st gear 7.3.1(-) - 7-axis third drive 2nd gear 7.3.2(-) - 9-axis second drive gear 9.2(+) - 9-axis first drive gear 9.1(+) - main drive gear 10.2(-) - second driven gear 10.3 - output 2nd shaft drive gear 11.2.1 - second output 2nd shaft 11.2.

[0055] The transmission mode for controlling the operation of the second output shaft 11.1 by manipulating the fourth drive shaft 4 (forward gear) is as follows: 5-axis drive 2-tooth 5.1.2(+) - 6-axis drive 2-tooth 6.1.2(-) - 6-axis drive 3-tooth 6.1.3(-) - 8-axis second drive gear 8.2(+) - 8-axis first drive gear 8.1(+) - 7-axis first drive 1-tooth 7.1.1(-) - 7-axis second drive gear 7.2(-) - 8-axis drive 1-tooth 8.3.1(+) - 8-axis drive 2-tooth 8.3.2(+) - 7-axis third drive 1-tooth 7.3.1(-) - 7-axis third drive 2-tooth 7.3.2(-) - 9-axis second drive gear 9.2(+) - 9-axis first drive gear 9.1(+) - main drive gear 10.2(-) - first driven gear 10.1 - output shaft drive gear 11.1.1 - second output shaft 11.1.

[0056] The transmission mode for controlling the operation of the second output shaft 11.2 by manipulating the fourth drive shaft 4 (forward gear) is as follows: 5-axis drive two gears 5.1.2(+) - 6-axis drive two gears 6.1.2(-) - 6-axis drive three gears 6.1.3(-) - 8-axis second drive gear 8.2(+) - 8-axis first drive gear 8.1(+) - 7-axis first drive one gear 7.1.1(-) - 7-axis second drive gear 7.2(-) - 8-axis drive one gear 8.3.1(+) - 8-axis drive two gears 8.3.2(+) - 7-axis third drive one gear 7.3.1(-) - 7-axis third drive two gears 7.3.2(-) - 9-axis second drive gear 9.2(+) - 9-axis first drive gear 9.1(+) - main drive gear 10.2(-) - second driven gear 10.3 - output shaft drive gear 11.2.1 - second output shaft 11.2.

[0057] Manipulating the fourth drive shaft 4 controls the second output shaft 11.1 (reverse gear): 5-axis drive 2 teeth 5.1.2(+) - 6-axis drive 2 teeth 6.1.2(-) - 7-axis second drive 2 teeth 7.1.2(+) - 7-axis second drive gear 7.2(+) - 8-axis drive 1 tooth 8.3.1(-) - 8-axis drive 2 teeth 8.3.2(-) - 7-axis third drive 1 tooth 7.3.1(+) - 7-axis third drive 2 teeth 7.3.2(+) - 9-axis second drive gear 9.2(-) - 9-axis first drive gear 9.1(-) - main drive gear 10.2(+) - first driven gear 10.1 - output shaft drive gear 11.1.1 - second output shaft 11.1.

[0058] Manipulating the fourth drive shaft 4 controls the second output shaft 11.2 (reverse gear): 5-axis drive gear 2 (5.1.2(+)) - 6-axis drive gear 2 (6.1.2(-)) - 7-axis second drive gear 2 (7.1.2(+)) - 7-axis second drive gear 2 (7.2(+)) - 8-axis drive gear 1 (8.3.1(-)) - 8-axis drive gear 2 (8.3.2(-)) - 7-axis third drive gear 1 (7.3.1(+)) - 7-axis third drive gear 2 (7.3.2(+)) - 9-axis second drive gear 2 (9.2(-)) - 9-axis first drive gear 1 (9.1(-)) - main drive gear 10.2(+) - second driven gear 10.3 - output shaft drive gear 11.2.1 - second output shaft 11.2.

[0059] Manipulate the first end section shift fork shaft 12, the first driven gear 10.1 and the main drive gear 10.2 are separated, and the power output of the nine-axis first drive gear 9.1-main drive gear 10.2-second driven gear 10.3-output second shaft drive gear 11.2.1-second output second shaft 11.2 is achieved.

[0060] Manipulate the second final section shift fork shaft 13 to separate the main drive gear 10.2 and the second driven gear 10.3. The nine-axis first drive gear 9.1-main drive gear 10.2-first driven gear 10.1-output shaft drive gear 11.1.1-second output shaft 11.1 power output.

Claims

1. A transmission case for a farm management machine, characterized by: The device includes a housing and a transmission system. The housing includes a transmission mounting part and an end cover. The transmission system includes a power input shaft, a transmission shaft assembly, a power output shaft assembly, and a shift fork assembly. The power input shaft is connected to the power output shaft via the transmission shaft assembly. The power output shaft assembly includes a first output shaft and a second output shaft assembly. The second output shaft assembly includes a second output shaft (11.1) and a second output shaft (11.2). The shift fork assembly includes a first end shift fork shaft (12) and a second end shift fork shaft (13). The first end shift fork shaft (12) is used to control the output action of the second output shaft (11.1) and the second end shift fork shaft (13) is used to control the output action of the second output shaft (11.2).

2. The farm management machine transmission case according to claim 1, characterized by: The drive shaft assembly includes a first drive shaft (1), a second drive shaft (2), a third drive shaft (3), a fourth drive shaft (4), a fifth drive shaft (5), a sixth drive shaft (6), a seventh drive shaft (7), an eighth drive shaft (8), a ninth drive shaft (9), and a tenth drive shaft (10) connected by drive rods.

3. The farm management machine transmission case according to claim 2, characterized by: The third drive shaft (3) is equipped with a three-axis first gear (3.1) and a three-axis second gear (3.2), and the power input shaft is equipped with a five-axis first transmission gear set and a five-axis second transmission gear (5.2). The five-axis first transmission gear set includes a five-axis transmission gear (5.2). 5.1.1) and five-axis transmission two-tooth (5.1.2), wherein the three-axis first gear (3.1) and the five-axis second transmission gear (5.2) are meshed and connected.

4. The transmission box of the garden tiller according to claim 3, characterized in that: The output end of the first output shaft is located outside the housing. The portion of the first output shaft located inside the housing is equipped with a six-axis first transmission gear set, a six-axis first transmission gear (6.2), and a six-axis third transmission gear (6.3). The six-axis first transmission gear set includes a six-axis transmission tooth (…). 6.1.1), Six-axis transmission two-tooth ( 6.1.2) and six-axis transmission three-tooth ( 6.1.3), the five-axis transmission with one gear ( 5.1.1) and the six-axis drive one-tooth (6.1.1) meshing connection.

5. The transmission box of the garden tiller according to claim 4, characterized in that: The seventh drive shaft (7) is equipped with a seventh-axis first drive gear set, a seventh-axis second drive gear (7.2), and a seventh-axis third drive gear set. The seventh-axis first drive gear set includes a seventh-axis first drive gear tooth (7.2). 7.1.1) and the second gear of the seventh shaft transmission ( 7.1.2), the seven-axis third transmission gear set includes a first tooth of the seventh-axis third transmission (7.3.1) and a second tooth of the seventh-axis third transmission (7.3.2).

6. The transmission box of the garden tiller according to claim 5, characterized in that: The eighth drive shaft (8) is equipped with an eight-axis first drive gear (8.1), an eight-axis second drive gear (8.2), and an eight-axis third drive gear set. The eight-axis third drive gear set includes an eight-axis drive tooth (8.3.1) and an eight-axis drive tooth (8.3.2). The eight-axis drive tooth (8.3.1) is meshed with the seven-axis second drive gear (7.2), and the eight-axis drive tooth (8.3.2) is meshed with the seven-axis third drive tooth (7.3.1).

7. The transmission box of the garden tiller according to any one of claims 2 to 6, characterized in that: The ninth drive shaft (9) is equipped with a first drive gear (9.1) and a second drive gear (9.2), and the tenth drive shaft (10) is equipped with a main drive gear (10.2), a first driven gear (10.1) and a second driven gear (10.3). The main drive gear (10.2) is meshed with the first drive gear (9.1).

8. The transmission box of the garden tiller according to claim 7, characterized in that: One end of the second output shaft (11.1) is located outside the housing, and the other end of the second output shaft (11.1) is located inside the housing. The end of the second output shaft (11.1) located inside the housing is fixedly connected to an output shaft drive gear (11.1.1). The output shaft drive gear (11.1.1) is engaged and driven by the first driven gear (10.1). The second output shaft (11.2) is mirrored in arrangement with the second output shaft (11.1). The end of the second output shaft (11.2) located inside the housing is fixedly installed with an output shaft drive gear (11.2.1). The output shaft drive gear (11.2.1) is engaged and driven by the second driven gear (10.3).

9. The transmission box of the garden tiller according to claim 8, characterized in that: One end of the first end-section shift fork shaft (12) is located inside the housing, and the other end of the first end-section shift fork shaft (12) is located outside the housing. The end of the first end-section shift fork shaft (12) located inside the housing is used to engage the first driven gear (10.1) and the output shaft drive gear (11.1.1). One end of the second end-section shift fork shaft (13) is located inside the housing, and the other end of the second end-section shift fork shaft (13) is located outside the housing. The end of the second end-section shift fork shaft (13) located inside the housing is used to engage the second driven gear (10.3) and the output shaft drive gear (11.2.1).

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