Variable speed gear box transmission mechanism for transplanter

Abstract

The utility model discloses a variable speed gear box transmission mechanism for a transplanter. A box cover and a box body are detachably fixed, an input shaft, a first output shaft and a second output shaft are horizontally arranged in parallel and are all perpendicular to the box cover, the input shaft, the first output shaft and the second output shaft form rotating pairs with the box cover and the box body, and the input shaft and the first output shaft are connected through a reduction gear set arranged in the box body. A first change gear and a second change gear which are arranged in a spaced mode are fixed to the position, located in the box body, of the first output shaft, a sleeve of the sliding gear set is connected with the position, located in the box body, of the second output shaft through a spline and a spline groove, and a third change gear and a fourth change gear fixed to the two ends of the sleeve are located between the first change gear and the second change gear. The speed reducer has the functions of speed reduction and speed change at the same time, can transmit power to different execution components of the transplanter, and is small in size, low in weight, compact in structure and high in stability.

Description

Technical Field

[0001] This utility model belongs to the field of gearbox transmission technology, specifically relating to a variable speed gearbox transmission mechanism for transplanting machines. Background Technology

[0002] In recent years, agricultural machinery has been developing towards miniaturization and lightweighting, especially transplanting machinery, which places greater emphasis on overall machine portability to meet the needs of hilly and mountainous areas, small fields, and greenhouse operations. Currently, the main actuating components of non-traction transplanters are the frame chassis and the transplanting mechanism. The transmission components include a reducer, gearbox, and various levels of chain and belt drives, which transmit the power output from the engine to the frame chassis and the transplanting mechanism to perform the transplanting operation.

[0003] However, the power output from the engine must pass through a reducer and a multi-speed gearbox to adjust the torque and speed to an appropriate range before being input to the actuators. This necessitates consideration of the size and weight of the reducer and gearbox, their connection, and installation layout, which is detrimental to the overall lightweight design of the machine. Furthermore, poor precision in the connection between the reducer and gearbox can lead to abnormal noises, vibrations, and low stability. Therefore, a new technical solution is needed to address these issues. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose a variable speed gearbox transmission mechanism for transplanting machines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model discloses a variable speed gearbox transmission mechanism for a transplanter, comprising a cover, a housing, an input shaft, an output shaft one, an output shaft two, a reduction gear set, and a sliding gear set.

[0007] The cover and housing are detachably fixed. The input shaft passes through a circular hole 1 on the housing and enters the housing body, forming a rotating pair with both the cover and the circular hole 1. The output shaft 1 passes through a circular hole 2 on the housing body and enters the housing body, forming a rotating pair with both the cover and the circular hole 2. It is connected to the input shaft through a reduction gear set located inside the housing body. A speed-changing gear 1 and a speed-changing gear 2, arranged at intervals, are fixed on the output shaft 1 within the housing body. The output shaft 2 passes through a circular hole 3 on the cover and enters the housing body, forming a rotating pair with both the housing body and the circular hole 3. The auxiliary gear set is located on the output shaft two within the housing. It consists of a sleeve and two gear sets, a third and a fourth gear, fixed at both ends of the sleeve. The sleeve is fitted onto the output shaft two and connected to it via splines and spline grooves. Both gear sets are located between gear sets one and two, with gear set three being closer to gear set one than gear set four. The input shaft is located outside the housing and connected to the clutch mounting shaft via a belt drive mechanism. A clutch is mounted on the clutch mounting shaft.

[0008] Preferably, the box body is also provided with a slot.

[0009] Preferably, the reduction gear set includes a first reduction gear pair, a first gear shaft, a second reduction gear pair, a second gear shaft, and a third reduction gear pair. Both the first and second gear shafts are parallel to the input shaft. One end of each of the first and second gear shafts forms a rotating pair with the housing cover, and the other end of each of the first and second gear shafts forms a rotating pair with the housing body. The first gear shaft is connected to the input shaft through the first reduction gear pair and to the second gear shaft through the second reduction gear pair. The second gear shaft is connected to the output shaft through the third reduction gear pair.

[0010] More preferably, the reduction gear pair includes a first reduction gear and a second reduction gear, which mesh and are respectively fixed on the input shaft and the gear shaft.

[0011] More preferably, the second reduction gear pair includes a third reduction gear and a fourth reduction gear, which mesh and are respectively fixed on the first gear shaft and the second gear shaft.

[0012] More preferably, the reduction gear pair three includes reduction gear five and reduction gear six, which mesh and are respectively fixed on gear shaft two and output shaft one, and reduction gear six is ​​located on the side of the transmission gear one away from the transmission gear two.

[0013] Preferably, sprocket one and sprocket two are fixed to one end of output shaft one located outside the housing and the other end of output shaft two located outside the housing cover, respectively.

[0014] This utility model has the following beneficial effects:

[0015] This invention features both deceleration and multi-speed transmission functions, enabling power transmission to different actuators of the transplanter. It is small in size, lightweight, compact in structure, and highly stable. Specifically, the horizontally and parallelly arranged input shaft, output shaft one, and output shaft two form a rotating pair with the assembly consisting of a cover and a housing. The input shaft and output shaft one are connected by a reduction gear set located inside the housing. This allows the engine to transmit power to the input shaft, which then decelerates the power through the reduction gear set before transmitting it to output shaft one, thus achieving the deceleration function. Furthermore, output shaft two is connected to a sliding gear set via splines and spline grooves. When the clutch disengages, the shifting mechanism mounted on the housing drives the sliding gear set to translate, causing the shift gear three of the sliding gear set to mesh with the shift gear one on output shaft one, or the shift gear four of the sliding gear set to mesh with the shift gear two on output shaft one, or the shift gear three to mesh with the shift gear… Gear 1 and gear 4 do not mesh with gear 2. Engaging the clutch allows output shaft 2 to rotate at speed 1, speed 2, or remain stationary, thus achieving a speed change function. Output shaft 1 and output shaft 2 are connected to the transplanting mechanism and chassis of the transplanter, respectively, thereby transmitting power to different actuators of the transplanter. This invention integrates a reducer and gearbox, achieving both speed reduction and multi-speed shifting. By spatially staggering the input shaft, output shafts, and gear shafts of the reduction gear set within the housing, interference between shafts is avoided, optimizing housing space utilization, reducing the overall weight and volume, achieving a lightweight design, and making the transmission device more compact. Furthermore, the gear pair connection between the reduction and shifting components ensures high power transmission stability, reducing abnormal noise and vibration, thereby improving the overall stability and reliability of the machine. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 for Figure 1 The right view;

[0018] Figure 3 for Figure 1 The left view;

[0019] Figure 4 This is a schematic diagram of the structure of the box cover of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the box in this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the present invention after removing the lid, body, pulley, sprocket one, and sprocket two.

[0022] Figure 7 for Figure 6 The left view;

[0023] Figure 8 This is a schematic diagram of the input shaft and reduction gear in this utility model;

[0024] Figure 9 This is a schematic diagram of the structure of gear shaft one, reduction gear two, and reduction gear three in this utility model;

[0025] Figure 10 This is a schematic diagram of the structure of gear shaft two, reduction gear four, and reduction gear five in this utility model;

[0026] Figure 11 This is a schematic diagram of the structure of output shaft one, reduction gear six, speed change gear one and speed change gear two in this utility model;

[0027] Figure 12 This is a schematic diagram of the structure of the second output shaft and the sliding gear set in this utility model;

[0028] Figure 13 This is a schematic diagram of the structure of the present invention after removing the box cover, box body, pulley, sprocket one and sprocket two, and with gear one and gear three meshing;

[0029] Figure 14 This is a schematic diagram of the structure of the present invention after removing the cover, body, pulley, sprocket one, and sprocket two, and with gear two meshing with gear four. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings.

[0031] like Figures 1 to 12As shown, this utility model discloses a variable speed gearbox transmission mechanism for a transplanter, including a cover 4, a housing 5, an input shaft 6, an output shaft 11, an output shaft 2 14, a reduction gear set, and a sliding gear set 15. The cover 4 and housing 5 are detachably fixed. The input shaft 6, output shaft 11, and output shaft 2 14 are arranged horizontally and parallel to each other, and are all perpendicular to the cover 4. The input shaft 6 passes through a circular hole 1 on the housing 5 and forms a rotating pair with the cover 4 and the circular hole 1. The output shaft 11 passes through a circular hole 2 on the housing 5 and forms a rotating pair with the cover 4 and the circular hole 2. It is connected to the input shaft 6 through the reduction gear set located inside the housing 5, and the output shaft 11... 11. A first gear 13 and a second gear 2, arranged at intervals, are fixed inside the housing 5. The second output shaft 14 passes through a circular hole 3 on the housing cover 4 and enters the housing 5, forming a rotating pair with both the housing 5 and the circular hole 3. A sliding gear set 15 is located on the second output shaft 14 inside the housing 5, and consists of a sleeve and a third and a fourth gear 2, which are fixed at both ends of the sleeve. The sleeve is fitted onto the second output shaft 14 and is connected to the second output shaft 14 by a spline and a spline groove. The connection (which can be a sleeve with a spline groove and a spline on the output shaft 2 14) is as follows: both the third and fourth gears are located between the first and second gears, with the third gear being closer to the first gear than the fourth gear; the housing 5 also has a slot for installing a shifting mechanism, which drives the sliding gear set 15 to move horizontally; the reduction gear set includes a first reduction gear pair 7, a first gear shaft 8, a second reduction gear pair 9, a second gear shaft 10, and a third reduction gear pair 12. The first and second gear shafts 8 and 10 are parallel to the input shaft 6. One end of the first and second gear shafts 8 and 10 forms a rotating pair with the housing cover 4, and the other end forms a rotating pair with the housing 5. The first gear shaft 8 is connected to the input shaft 6 through the first reduction gear pair 7 and to the second gear shaft 10 through the second reduction gear pair 9. The second gear shaft 10 is connected to the output shaft 11 through the third reduction gear pair 12.

[0032] One end of the input shaft 6 located outside the housing is connected to the clutch mounting shaft via a belt drive mechanism. The two pulleys 1 of the belt drive mechanism are fixed on the input shaft 6 and the clutch mounting shaft, respectively. The clutch mounting shaft is equipped with a clutch for connecting the engine. The engine transmits power to the input shaft 6 through the clutch and the belt drive mechanism.

[0033] As a preferred embodiment, a sprocket 2 and a sprocket 3 are respectively fixed to one end of the output shaft 11 located outside the housing 5 and the other end of the output shaft 14 located outside the housing cover 4. The sprocket 2 is used by the output shaft 11 to transmit power to the transplanting mechanism of the transplanter through the chain drive mechanism, and the sprocket 3 is used by the output shaft 14 to transmit power to the chassis of the transplanter through the chain drive mechanism.

[0034] In a preferred embodiment, the reduction gear pair 7 includes a first reduction gear and a second reduction gear, which mesh and are respectively fixed on the input shaft 6 and the gear shaft 8. The shaft distance between the input shaft 6 and the gear shaft 8 is 57mm. The first reduction gear has a module of 1.25, 20 teeth, and a tooth width of 15mm. The second reduction gear has a module of 1.25, 70 teeth, and a tooth width of 10mm. The transmission ratio of the reduction gear pair 7 is 3.5.

[0035] In a preferred embodiment, the second reduction gear pair 9 includes a third reduction gear and a fourth reduction gear. The third reduction gear and the fourth reduction gear mesh and are respectively fixed on the first gear shaft 8 and the second gear shaft 10. The axial distance between the first gear shaft 8 and the second gear shaft 10 is 68 mm. The module of the third reduction gear is 1.25, the number of teeth is 24, and the tooth width is 15 mm. The module of the fourth reduction gear is 1.25, the number of teeth is 84, and the tooth width is 10 mm. The transmission ratio of the second reduction gear pair 9 is 3.5.

[0036] In a preferred embodiment, the reduction gear pair 3 12 includes reduction gear 5 and reduction gear 6, which mesh and are respectively fixed on gear shaft 2 10 and output shaft 1 11. Reduction gear 6 is located on the side of the transmission gear 1 13 away from transmission gear 2. The axial distance between gear shaft 2 10 and output shaft 1 11 is 70mm. Reduction gear 5 has a module of 1.25, 28 teeth, and a tooth width of 15mm. Reduction gear 6 has a module of 1.25, 84 teeth, and a tooth width of 10mm. The transmission ratio of reduction gear pair 3 12 is 3.

[0037] In a preferred embodiment, the end face distance between the first gear 13 and the sixth reduction gear is 3mm, and the end face distance between the first gear 13 and the second gear is 40mm. The first gear 13 has a module of 2, 24 teeth, and a tooth width of 15mm. The second gear has a module of 2, 17 teeth, and a tooth width of 15mm. The shaft distance between the first output shaft 11 and the second output shaft 14 is 78mm. The third gear has a module of 2, 54 teeth, and a tooth width of 10mm. The fourth gear has a module of 2, 61 teeth, and a tooth width of 10mm. The end face distance between the third gear and the fourth gear is 10mm. The transmission ratio between the first gear 13 and the third gear is 2.25, and the transmission ratio between the second gear and the fourth gear is 3.59.

[0038] The working principle of the variable speed gearbox transmission mechanism for a transplanter according to this utility model is as follows:

[0039] The housing 5 is installed on the frame of the transplanter. The clutch is connected to the drive shaft of the engine on the frame. Output shaft 11 is connected to the drive shaft of the transplanting mechanism of the transplanter via a chain drive mechanism. Output shaft 2 14 is connected to the chassis drive shaft of the transplanter via a chain drive mechanism. A shifting mechanism 16 (which can be a shift fork that forms a sliding pair with the groove opened in the housing 5 and whose head is embedded between the third and fourth gears, the groove being parallel to the second output shaft 2 14) is installed on the groove, so that the shifting mechanism is connected to the sleeve, driving the sleeve to move horizontally. When the engine drives the input shaft 6 to rotate via the belt drive mechanism, the input shaft 6 reduces speed and increases torque through the reduction gear set, transmitting power to the output shaft 11. The output shaft 11 transmits power to the transplanting mechanism via the chain drive mechanism, making the transplanting mechanism work. When the clutch is disengaged, the shifting mechanism drives the sleeve to move the entire sliding gear set 15 towards the third gear, so that the first gear 13 meshes with the third gear. Figure 13 As shown, when the clutch is engaged, output shaft 11 drives output shaft 14 to rotate at speed 1 via gear 13 and gear 3. Output shaft 14 transmits power to the chassis at speed 1 through the chain drive mechanism, causing the chassis to move the entire transplanter at a translational speed 1. When the clutch is disengaged, the shift mechanism drives the sleeve to move the entire sliding gear set 15 towards gear 4, so that gear 2 meshes with gear 4, as shown in the diagram. Figure 14 As shown, when the clutch is engaged, output shaft 11 drives output shaft 2 14 to rotate at speed 2 via gears 2 and 4. Output shaft 2 14 transmits power to the chassis via the chain drive mechanism at speed 2, causing the chassis to move the entire transplanter at a translational speed 2. When the clutch is disengaged, the shift mechanism drive sleeve drives the entire sliding gear set 15 to translate between gears 13 and 2. When gears 13 and 3 are not meshed, and gears 2 and 4 are not meshed, as follows... Figure 6 As shown, when the clutch is engaged, the output shaft 14 does not rotate and enters neutral. The chassis does not move, thus enabling the change of the translation speed of the transplanter chassis.

Claims

1. A variable speed gearbox transmission mechanism for a transplanter, comprising a cover, a housing, and an input shaft, characterized in that: It also includes output shaft one, output shaft two, a reduction gear set, and a sliding gear set; the cover and housing are detachably fixed; the input shaft passes through a circular hole one on the housing and enters the housing, forming a rotating pair with both the cover and the circular hole one; output shaft one passes through a circular hole two on the housing and forms a rotating pair with both the cover and the circular hole two, and is connected to the input shaft through a reduction gear set located inside the housing; and output shaft one has two variable speed gears one and two fixedly arranged at intervals on it within the housing, and output shaft two passes through a circular hole three on the cover and enters the housing. The gear set, along with the housing and the three round holes, forms a rotating pair. The sliding gear set is located on the output shaft two within the housing and consists of a sleeve and two gears, a third and a fourth, fixed at both ends of the sleeve. The sleeve is fitted onto the output shaft two and connected to it via splines and spline grooves. Both gears three and four are located between gears one and two, with gear three being closer to gear one than gear four. The input shaft, located outside the housing, is connected to the clutch mounting shaft via a belt drive mechanism, and a clutch is mounted on the clutch mounting shaft.

2. The variable speed gearbox transmission mechanism for a transplanter according to claim 1, characterized in that: The box body is also provided with slots.

3. The variable speed gearbox transmission mechanism for a transplanter according to claim 1, characterized in that: The reduction gear set includes a first reduction gear pair, a first gear shaft, a second reduction gear pair, a second gear shaft, and a third reduction gear pair. Both the first and second gear shafts are parallel to the input shaft. One end of each of the first and second gear shafts forms a rotating pair with the housing cover, and the other end of each of the first and second gear shafts forms a rotating pair with the housing body. The first gear shaft is connected to the input shaft through the first reduction gear pair and to the second gear shaft through the second reduction gear pair. The second gear shaft is connected to the first output shaft through the third reduction gear pair.

4. The variable speed gearbox transmission mechanism for a transplanter according to claim 3, characterized in that: The reduction gear pair includes a first reduction gear and a second reduction gear, which mesh and are respectively fixed on the input shaft and the gear shaft.

5. The variable speed gearbox transmission mechanism for a transplanter according to claim 3, characterized in that: The second reduction gear pair includes a third reduction gear and a fourth reduction gear. The third reduction gear and the fourth reduction gear mesh and are respectively fixed on the first gear shaft and the second gear shaft.

6. The variable speed gearbox transmission mechanism for a transplanter according to claim 3, characterized in that: The reduction gear pair three includes reduction gear five and reduction gear six, which mesh and are fixed on gear shaft two and output shaft one, respectively, and reduction gear six is ​​located on the side of the transmission gear one away from the transmission gear two.

7. The variable speed gearbox transmission mechanism for a transplanter according to claim 1, characterized in that: Sprocket 1 and sprocket 2 are respectively fixed to one end of output shaft 1 located outside the housing and the other end of output shaft 2 located outside the housing cover.

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