Multi-gear adjusting gearbox

Abstract

The utility model discloses a multi-gear adjusting gearbox. The multi-gear adjusting gearbox comprises a box body, a main shaft, a walking shaft, at least one gear shifting gear, an adjusting gear set and a walking shifting fork rod assembly, wherein the main shaft and the walking shaft are installed in the box body and are arranged in parallel; the gear shifting gear is arranged at an interval; the adjusting gear set is installed on the walking shaft in a sliding mode; at least one gear shifting gear is arranged on the main shaft, and the adjusting gear set is arranged on the walking shaft, so that the walking shifting fork rod assembly in the box body shifts the adjusting gear set to be meshed with the gear shifting gears at different positions, switching adjustment of different gears is achieved, adjustment of the walking speed of the farming machine is achieved, and different farming reclamation requirements are met; the inner space of the box body is fully utilized through a reasonable connecting structure and a mounting position between the walking shaft and the main shaft, so that the tidy structure is more compact, normal transmission and gear shifting functions are ensured, the overall size of the box body is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, specifically relating to a multi-gear adjustable gearbox. Background Technology

[0002] In China's vast rural areas, agricultural tillers are being used more and more widely, playing a huge role in tilling and cultivation. Operators usually hold the handle frame assembly of the multi-speed adjustable gearbox of the agricultural tiller with both hands and move forward with the multi-speed adjustable gearbox. They control the rotation of the two wheels at both ends by pulling cables set on the handles.

[0003] Currently, the transmission performance of small agricultural tillers in China is limited, making it difficult to achieve their ideal working efficiency. For example, due to the requirements of agricultural reclamation such as paddy fields, greenhouses, and orchards, different soil types or conditions, as well as different situations such as when the tiller is tilling the land or traveling on non-tilled land, or different terrains, the tiller needs to operate at different speeds to meet different practical needs. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a multi-gear adjustable gearbox, which aims to solve the technical problem of low work efficiency caused by the single transmission performance of existing agricultural machines.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-gear adjustable gearbox, comprising:

[0006] Box;

[0007] A main shaft, installed in the housing, is used for drive connection with the output shaft of the engine. At least one shift gear is provided on the main shaft at intervals.

[0008] A traveling shaft is disposed inside the housing and is arranged parallel to the main shaft;

[0009] An adjusting gear set, slidably mounted on the travel shaft, and;

[0010] The travel shift fork assembly is movably mounted on the housing and is used to engage the adjusting gear set with the shift gear at different positions to achieve gear adjustment.

[0011] Furthermore, the walking fork assembly includes a walking fork rod with one end extending into the housing and abutting against the adjusting gear set, and a positioning component installed in the housing for positioning the walking fork rod when it moves to a suitable position. The walking fork rod is provided with a plurality of positioning slots for cooperating with the positioning component to achieve positioning.

[0012] Furthermore, the positioning component includes a first locking bolt fixedly installed on the housing, a first elastic element installed at one end of the first locking bolt, and a first steel ball connected to the first elastic element and elastically snapped into the positioning groove.

[0013] Furthermore, the traveling shaft is provided with a first spline, and the adjusting gear set is provided with a first spline groove that mates with the first spline.

[0014] Furthermore, the adjusting gear set includes a first sliding sleeve slidably mounted on the traveling shaft, and a first double gear and a first adjusting gear fixedly disposed at intervals on the first sliding sleeve. One side of the traveling fork is disposed between the first double gear and the first adjusting gear, and the first spline groove is disposed on the first sliding sleeve.

[0015] Furthermore, the housing also includes a working shaft arranged parallel to the main shaft, a second double gear slidably disposed on the working shaft, and a working shift fork assembly disposed in the housing for engaging the second double gear with the shift gears at different positions.

[0016] Furthermore, the working shift fork assembly includes a working shift fork rod with one end extending into the housing and abutting against the second double gear, and a fixing component installed in the housing for fixing the working shift fork rod when it moves to a suitable position. The working shift fork rod is provided with a plurality of fixing grooves for cooperating with the fixing component to achieve positioning.

[0017] Furthermore, the fixing component includes a second locking bolt fixedly installed on the housing, a second elastic element installed at one end of the second locking bolt, and a second steel ball connected to the second elastic element and elastically snapped into the fixing groove.

[0018] Furthermore, the working shift fork includes a movable rod and a fork fixedly sleeved on the movable rod, and the end of the movable rod is provided with the fixing groove.

[0019] Furthermore, the axial direction of the second locking bolt is perpendicular to the axial direction of the movable rod.

[0020] The beneficial effects of this utility model are as follows: Compared with the prior art, the multi-gear adjustable gearbox of this utility model has at least one shift gear on the main shaft and an adjusting gear set on the traveling shaft. The adjusting gear set is engaged with the shift gear at different positions by the traveling shift fork rod assembly in the gearbox, thereby realizing the switching and adjustment of different gears, thus realizing the adjustment of the traveling speed of the agricultural tiller to meet different agricultural reclamation requirements. Through the reasonable connection structure and installation position between the traveling shaft and the main shaft, the internal space of the gearbox is fully utilized, making the neat structure more compact. While ensuring normal transmission and shifting functions, the overall volume of the gearbox is reduced, and the production cost is reduced.

[0021] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0022] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0023] Figure 1 This is a schematic diagram of the structure of a multi-gear adjustable gearbox according to an embodiment of the present invention;

[0024] Figure 2 This is a first-view structural diagram of a multi-gear adjustable gearbox according to an embodiment of the present invention, after the housing has been removed.

[0025] Figure 3 This is a structural schematic diagram of a multi-gear adjustable gearbox according to an embodiment of the present invention, after removing the gearbox housing, from a second perspective.

[0026] Figure 4 This is a structural schematic diagram from a third-person perspective of a multi-gear adjustable gearbox according to an embodiment of the present invention, after removing the gearbox housing.

[0027] Figure 5 This is a structural schematic diagram from a fourth perspective of a multi-gear adjustable gearbox according to an embodiment of the present invention, after removing the gearbox housing.

[0028] Icon labels:

[0029] 1-Box;

[0030] 2-Spindle; 21-Shift gear;

[0031] 3-Travel axis; 31-First spline;

[0032] 4-Adjusting gear set; 41-First sliding sleeve; 42-First double gear; 43-First adjusting gear;

[0033] 5-Travel fork assembly; 51-Travel fork lever; 52-Positioning assembly; 521-First locking bolt; 522-First elastic element; 523-First steel ball; 53-Positioning groove;

[0034] 6-Working shaft; 61-Second spline; 62-Second sliding sleeve;

[0035] 7-Second double gear;

[0036] 8-Working shift fork assembly; 81-Working shift fork; 811-Moving rod; 812-Fork rod; 82-Fixing assembly; 821-Second locking bolt; 822-Second elastic element; 823-Second steel ball; 83-Fixing groove;

[0037] 9-Steering mechanism. Detailed Implementation

[0038] like Figures 1 to 5 As shown, this embodiment proposes a multi-gear adjustable gearbox, including a housing 1, a main shaft 2, and a traveling shaft 3. The main shaft 2 and the traveling shaft 3 are installed in the housing 1 and are arranged in parallel. The traveling shaft 3 is connected to the traveling wheels of the agricultural tiller. At least one shift gear 21 is provided at intervals on the main shaft 2. An adjusting gear set 4 is slidably installed on the traveling shaft 3. In addition, the housing 1 is also provided with a traveling shift fork assembly 5, which can be used to move the adjusting gear set 4 to engage with the shift gear 21 at different positions. In this way, by providing at least one shift gear 21 on the main shaft 2 and an adjusting gear set 4 on the traveling shaft 3, the traveling fork rod assembly 5 in the housing 1 can move the adjusting gear set 4 to mesh with the shift gear 21 at different positions, thereby realizing the switching and adjustment of different gears, and thus realizing the adjustment of the traveling speed of the agricultural tiller to meet different agricultural reclamation requirements. Through the reasonable connection structure and installation position between the traveling shaft 3 and the main shaft 2, the internal space of the housing 1 is fully utilized, making the neat structure more compact, ensuring normal transmission and shifting functions while reducing the overall volume of the housing 1 and reducing production costs.

[0039] Preferably, there are three shift gears 21, each with a different number of teeth and a different size. This allows for speed switching by adjusting the gear set 4 to engage with the shift gears 21 at different positions. Of course, in this embodiment, the number of shift gears 21 can also be four, five, etc., depending on the actual situation and specific needs; this is not a fixed limitation.

[0040] Preferably, please refer to Figure 2As shown, the housing 1 is also equipped with a steering mechanism 9, and the main shaft 2 is also equipped with a transmission gear, which meshes with the gear in the steering mechanism 9. In this way, the transmission power is transmitted to the steering mechanism 9 through the transmission gear on the main shaft 2, and the steering mechanism 9 realizes the steering of the agricultural tiller.

[0041] Further, please refer to Figure 3 As shown, the travel fork assembly 5 includes a travel fork rod 51 and a positioning component 52. One end of the travel fork rod 51 extends into the housing 1 and abuts against the adjusting gear set 4. The positioning component 52 is installed in the housing 1. The travel fork rod 51 is provided with multiple positioning slots 53. The positioning component 52 can be used to position the travel fork rod 51 when it moves to a suitable position. Specifically, in this application, when shifting gears, the positioning component 52 can be connected with the positioning slots 53 at different positions to achieve positioning after gear shifting.

[0042] Preferably, in this embodiment, there are five positioning slots 53. By setting five positioning slots 53, they can cooperate with the positioning component 52 to position the travel fork lever 51 at five locations. Of course, in this embodiment, depending on the actual situation and specific needs, the number of positioning slots 53 can also be set to other numbers, and is not limited here.

[0043] Further, please refer to Figure 3 As shown, the positioning assembly 52 includes a first locking bolt 521, a first elastic element 522, and a first steel ball 523. The first locking bolt 521 is fixedly installed on the housing 1, and the first elastic element 522 is installed at one end of the first locking bolt 521. The first elastic element 522 is connected to the first steel ball 523. In this way, the first elastic element 522 elastically pushes the first steel ball 523, thereby allowing the first steel ball 523 to be engaged in the positioning groove 53 for positioning.

[0044] Preferably, the end of the first locking bolt 521 is provided with a receiving groove, and the first elastic member 522 is received in the receiving groove. By providing the receiving groove, the first elastic member 522 can be better fixed. At the same time, it also makes the overall structure more compact, reduces the overall volume of the box 1, and reduces production costs.

[0045] Further, please refer to Figure 2 As shown, the traveling shaft 3 is provided with a first spline 31, and the adjusting gear set 4 is provided with a first spline groove. By engaging the first spline 31 with the first spline groove, the adjusting gear set 4 can be guided to slide along the axial direction of the traveling shaft 3.

[0046] Further, please refer to Figure 2As shown, the adjusting gear set 4 includes a first sliding sleeve 41, a first double gear 42, and a first adjusting gear 43. The first sliding sleeve 41 is slidably mounted on the travel shaft 3. The first double gear 42 and the first adjusting gear 43 are fixedly disposed on the first sliding sleeve 41 at intervals. Furthermore, one side of the travel shift fork 51 is disposed between the first double gear 42 and the first adjusting gear 43, and the first spline groove is disposed on the first sliding sleeve 41. Thus, by moving the first adjusting gear 43 or the first double gear 42 with the travel shift fork 51, the first adjusting gear 43 or the first double gear 42 drives the first sliding sleeve 41 to move axially along the travel shaft 3, thereby allowing the first adjusting gear 43 or the first double gear 42 to mesh with shift gears 21 at different positions, achieving gear switching. Preferably, the first double gear 42 and the first adjusting gear 43 are welded together to form a single unit, creating a three-gear system.

[0047] In this application, by setting a first spline 31 on the travel shaft 3, on the one hand, it is convenient for the adjustment gear set 4 to slide along the axial direction of the travel shaft 3, and on the other hand, it also limits the sliding stroke of the adjustment gear set 4, so that the adjustment gear set 4 moves within the limited sliding stroke.

[0048] Further, please refer to Figure 4 As shown, the housing 1 is also equipped with a working shaft 6, which is arranged parallel to the main shaft 2. The working shaft 6 is equipped with a second double gear 7. The housing 1 is also equipped with a working shift fork assembly 8. The working shift fork assembly 8 can be used to move the second double gear 7 to mesh with the shift gear 21 at different positions, thereby realizing the adjustment of the tillage speed of the agricultural tiller to meet the needs of different soil types or soil conditions for agricultural reclamation.

[0049] Further, please refer to Figure 3 and Figure 4 As shown, the working shaft 6 is provided with a second spline 61, and the second double gear 7 is provided with a second spline groove. By engaging the second spline 61 with the second spline groove, the second double gear 7 can be guided to slide along the axial direction of the working shaft 6.

[0050] Further, please refer to Figure 3 As shown, a second sliding sleeve 62 is also fitted onto the working shaft 6, the second spline groove is disposed on the second sliding sleeve 62, and the second double gear 7 is fixedly fitted onto the second sliding sleeve 62. Thus, by moving the second double gear 7 through the working fork rod assembly 8, the second double gear 7 slides along the axial direction of its working shaft 6 under the action of the second sliding sleeve 62.

[0051] Further, please refer to Figure 3 and Figure 4As shown, the working shift fork assembly 8 includes a working shift fork 81 and a fixing assembly 82. One end of the working shift fork 81 extends into the housing 1 and abuts against the second double gear 7. The fixing assembly 82 is installed in the housing 1. The working shift fork 81 is provided with multiple fixing slots 83, each of which can cooperate with the fixing assembly 82 to achieve positioning. Thus, when gear shifting is completed, the working shift fork 81 can be fixed by engaging with the fixing assembly 82 in different positions. Preferably, there are three fixing slots 83. Of course, in this embodiment, the number of fixing slots 83 can also be set to two, four, or other multiples, and is not limited here.

[0052] Further, please refer to Figure 3 As shown, the fixing assembly 82 includes a second locking bolt 821, which is mounted on the housing 1. A second elastic element 822 is mounted on one end of the second locking bolt 821, and a second steel ball 823 is provided on one end of the second elastic element 822. In this way, the second steel ball 823 is elastically pushed by the second elastic element 822, thereby causing the second steel ball 823 to engage in the fixing grooves 83 at different positions to fix the working fork lever 81.

[0053] Further, please refer to Figure 4 As shown, the working shift fork lever 81 includes a movable lever 811 and a fork lever 812. The fork lever 812 is fixedly sleeved on the movable lever 811, and the end of the movable lever 811 is provided with the aforementioned fixing groove 83. In this way, by controlling the movement of the movable lever 811, the movable lever 811 drives the fork lever 812 to move, and the fork lever 812 in turn drives the second double gear 7 to move, thereby realizing the switching of different tillage gears.

[0054] Preferably, the axial direction of the second locking bolt 821 is perpendicular to the axial direction of the movable rod 811. This perpendicular distribution ensures that the second elastic element 822 on the second locking bolt 821 can elastically push the second steel ball 823 into the fixing groove 83 on the movable rod 811, thereby enhancing the stability of the movable rod 811.

[0055] In this application, by providing at least one shift gear 21 on the main shaft 2, a first double gear 42 and a first adjusting gear 43 on the walking shaft 3, and a second double gear 7 on the working shaft 6, the walking shift fork 51 and the working shift fork 81 in the housing 1 respectively actuate the above-mentioned gears to mesh with the shift gear 21 at different positions, thereby realizing the switching and adjustment of different walking gears and tillage gears, and thus realizing the adjustment of the walking speed of the agricultural tiller to meet the agricultural reclamation requirements of different regions.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A multi-gear adjustable transmission, characterized in that, include: Box; A main shaft, installed in the housing, is used for drive connection with the output shaft of the engine. At least one shift gear is provided on the main shaft at intervals. A traveling shaft is disposed inside the housing and is arranged parallel to the main shaft; An adjusting gear set, slidably mounted on the travel shaft, and; A travel fork lever assembly is movably mounted on the housing and is used to engage the adjusting gear set with the shift gear at different positions to achieve gear adjustment. The travel fork lever assembly includes a travel fork lever with one end extending into the housing and abutting against the adjusting gear set, and a positioning component mounted in the housing for positioning the travel fork lever when it moves to a suitable position. The travel fork lever is provided with a plurality of positioning grooves for cooperating with the positioning component to achieve positioning.

2. The multi-gear adjustable gearbox according to claim 1, characterized in that, The positioning component includes a first locking bolt fixedly installed on the housing, a first elastic element installed at one end of the first locking bolt, and a first steel ball connected to the first elastic element and elastically snapped into the positioning groove.

3. The multi-gear adjustable gearbox according to claim 1, characterized in that, The traveling shaft is provided with a first spline, and the adjusting gear set is provided with a first spline groove that mates with the first spline.

4. A multi-gear adjustable gearbox according to claim 3, characterized in that, The adjusting gear set includes a first sliding sleeve slidably mounted on the traveling shaft, and a first double gear and a first adjusting gear fixedly arranged at intervals on the first sliding sleeve. One side of the traveling fork is located between the first double gear and the first adjusting gear, and the first spline groove is located on the first sliding sleeve.

5. A multi-gear adjustable gearbox according to claim 1, characterized in that, The housing also includes a working shaft arranged parallel to the main shaft, a second double gear slidably disposed on the working shaft, and a working shift fork assembly disposed in the housing for engaging the second double gear with the shift gear at different positions.

6. A multi-gear adjustable gearbox according to claim 5, characterized in that, The working shift fork assembly includes a working shift fork with one end extending into the housing and abutting against the second double gear, and a fixing component installed in the housing for fixing the working shift fork when it moves to a suitable position. The working shift fork is provided with a plurality of fixing grooves for cooperating with the fixing component to achieve positioning.

7. A multi-gear adjustable gearbox according to claim 6, characterized in that, The fixing component includes a second locking bolt fixedly installed on the housing, a second elastic element installed at one end of the second locking bolt, and a second steel ball connected to the second elastic element and elastically snapped into the fixing groove.

8. A multi-gear adjustable gearbox according to claim 7, characterized in that, The working shift fork includes a movable rod and a fork fixedly sleeved on the movable rod, and the end of the movable rod is provided with the fixing groove.

9. A multi-gear adjustable gearbox according to claim 8, characterized in that, The axial direction of the second locking bolt is perpendicular to the axial direction of the movable rod.

Images