Gearbox and agricultural machine
By setting a chamfer and a copper sleeve structure on the gear ring of the gearbox, the problems of shift fork deformation and gear meshing difficulties are solved, enabling smooth gear shifting and labor-saving operation of the gearbox, and improving the operating efficiency of agricultural machinery.
Patent Information
- Application Number
- CN202520425592.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-03-11
AI Technical Summary
The shift forks of existing agricultural machinery gearboxes are too long and easily deformed. The gear machining precision makes shifting difficult and inconvenient.
Design a gearbox that uses a first guide angle and a second guide angle between 110 degrees and 130 degrees on the gear ring of the engagement sleeve. When the gear meshes with the gear ring, the guide angle guides the gear to improve meshing smoothness. The copper sleeve prevents friction, and the lever and shift fork groove enable effortless operation.
It enables smooth gear shifting and time-saving and labor-saving operation of the gearbox, improving the operating efficiency of agricultural machinery.
Smart Images
Figure CN223622115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural machinery, and in particular to a gearbox and agricultural machinery. Background Technology
[0002] In recent years, with the continuous acceleration of agricultural modernization, agricultural machinery of various structures, such as tractors, has been increasingly widely used in agricultural production.
[0003] The gearbox, as a core component of a vehicle's transmission system, is primarily used to regulate the engine's output speed and torque to adapt to the vehicle's power demands under different driving conditions. There are various types of gearboxes; however, for gearboxes widely used in agricultural machinery, various factors result in shift forks that are relatively long, potentially leading to deformation during operation. Furthermore, due to limitations in gear machining precision, shifting some gears can be quite difficult.
[0004] In summary, how to provide a gearbox that shifts gears more smoothly and is easier to operate, as well as agricultural machinery that includes such a gearbox, has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a gearbox that shifts gears more smoothly and is more time-saving and labor-saving to operate, as well as agricultural machinery including this gearbox.
[0006] The solution of this utility model is implemented as follows: This utility model proposes a gearbox for use in agricultural machinery, including a housing. A first shaft and a second shaft are disposed within the housing. The second shaft is located at one end of the first shaft, and the axes of the first and second shafts coincide. Gears are respectively provided at the joint of the first and second shafts. A coupling sleeve is provided on the gear to connect the first and second shafts together. A gear ring is provided within the coupling sleeve to mesh with the gears. The gear ring includes several first teeth, and the end faces of the first teeth are respectively provided with a first guide angle and a second guide angle of the same size, with the angles of the first guide angle and the second guide angle being between 110 degrees and 130 degrees. This gearbox structure, by setting the first guide angle and the second guide angle between 110 degrees and 130 degrees on the teeth of the gear ring of the coupling sleeve, facilitates engagement between the gear ring and the gears through the first guide angle and the second guide angle, making engagement easier. Therefore, gear shifting is smoother, and operation is more time-saving and labor-saving.
[0007] Another technical solution of this utility model is that, based on the above, the angles of the first guide angle and the second guide angle are between 118 degrees and 122 degrees.
[0008] Another technical solution of this utility model is that, based on the above, the angle between the first guide angle and the second guide angle is 120 degrees.
[0009] Another technical solution of this utility model is that, based on the above, the extension line of the hypotenuse of the first guide angle of the first gear tooth and the extension line of the hypotenuse of the second guide angle form a first angle, and the first angle is consistent with the size of the first guide angle and the second guide angle.
[0010] Another technical solution of this utility model is that, based on the above, the gear on the second shaft includes a plurality of second gear teeth, and the second gear teeth are respectively provided with a third guide angle and a fourth guide angle, the angles of the third guide angle and the fourth guide angle being consistent with the angles of the first guide angle and the second guide angle.
[0011] Another technical solution of this utility model is that, based on the above, the extension line of the hypotenuse of the third guide angle of the second gear tooth and the extension line of the hypotenuse of the fourth guide angle form a second angle, and the second angle is the same in magnitude as the first angle.
[0012] Another technical solution of this utility model is that, based on the above, the gearbox includes a control lever, the control lever is disposed on the housing, and one end of the control lever is provided with a shift fork for shifting gears.
[0013] Another technical solution of this utility model is that, based on the above, the connecting sleeve is provided with a shift fork groove, and the end of the shift fork away from the operating lever is placed in the shift fork groove.
[0014] Another technical solution of this utility model is that, based on the above, the end of the second shaft that contacts the first shaft is also provided with a copper sleeve to prevent friction, and the copper sleeve is sleeved on the shaft end of the second shaft.
[0015] In addition, this utility model also proposes an agricultural machine, including a gearbox, which is the gearbox described above. Attached Figure Description
[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.
[0017] Figure 1 This is a schematic diagram of the internal structure of a gearbox according to the present invention;
[0018] Figure 2 for Figure 1 Another structural schematic diagram of the transmission;
[0019] Figure 3 for Figure 1Schematic diagram of the structure of the intermediate joint sleeve;
[0020] Figure 4 for Figure 3 A partial structural diagram of the A-axis direction;
[0021] Figure 5 for Figure 1 Schematic diagram of the structure of the second axis in the middle;
[0022] Figure 6 for Figure 5 A partial structural diagram of the B-axis.
[0023] The correspondence between the attached figures is as follows:
[0024] 1. Shift fork 2. Engaging sleeve 3. First shaft
[0025] 4. Copper sleeve; 5. Second shaft; 6. Control lever
[0026] 7. Housing; 8. Flange; 9. Shift fork groove
[0027] 10 First gear tooth 11 First angle 12 Second gear tooth
[0028] 13 Second Angle 14 Gear Ring 15 Gear
[0029] R1 First guide angle, R2 Second guide angle, R3 Third guide angle
[0030] R4 fourth guide angle Detailed Implementation
[0031] The present invention will now be described in detail with reference to the accompanying drawings. This description is merely illustrative and explanatory, and should not be construed as limiting the scope of protection of the present invention. Furthermore, those skilled in the art can combine the features in the embodiments described herein and in different embodiments according to the description in this document.
[0032] The embodiments of this utility model are as follows, please refer to them. Figures 1 to 6 The transmission and its components shown include a housing 7, within which a first shaft 3 and a second shaft 5 are disposed. The second shaft 5 is located at one end of the first shaft 3. Figure 1 As shown on the right end, the axes of the first shaft 3 and the second shaft 5 coincide. Gears 15 are respectively provided at the joint of the first shaft 3 and the second shaft 5. A connecting sleeve 2 is provided on the gear 15 to connect the first shaft 3 and the second shaft 5. The connecting sleeve 2 can slide left and right on the gear 15. When one end of the connecting sleeve 2 is placed on the first shaft 3 and the other end is placed on the second shaft 5, the first shaft 3 and the second shaft 5 are engaged, and both shafts can rotate simultaneously. A gear ring 14 that meshes with the gear 15 is provided inside the connecting sleeve 2. The gear ring 14 includes several first gear teeth 10, such as... Figure 3 and Figure 5As shown, the end face of the first gear 10 is provided with a first guide angle R1 and a second guide angle R2 of the same size, and the angles of the first guide angle R1 and the second guide angle R2 are between 110 degrees and 130 degrees. In this gearbox structure, by setting the first guide angle R1 and the second guide angle R2 between 110 degrees and 130 degrees on the gear teeth of the gear ring 14 of the engagement sleeve 2, when the gear ring 14 needs to mesh with the gear 15, it is guided by the first guide angle R1 and the second guide angle R2, that is, the meshing of the two is easier. Therefore, the shifting is smoother and the operation is more time-saving and labor-saving.
[0033] Based on the above embodiments, in another embodiment of the present invention, such as Figure 3 and Figure 5 As shown, preferably, the angles of the first guide angle R1 and the second guide angle R2 are between 118 degrees and 122 degrees. More preferably, the angles of the first guide angle R1 and the second guide angle R2 are between 119.5 degrees and 120.5 degrees.
[0034] Based on the above embodiments, in another embodiment of the present invention, such as Figure 3 and Figure 5 As shown, preferably, the angle between the first guide angle R1 and the second guide angle R2 is 120 degrees.
[0035] Based on the above embodiments, in another embodiment of the present invention, such as Figure 5 As shown, the extension line of the hypotenuse of the first guide angle R1 and the extension line of the hypotenuse of the second guide angle R2 of the first gear tooth 10 form a first angle 11. The first angle 11 is the same as the size of the first guide angle R1 and the second guide angle R2, that is, between 110 degrees and 130 degrees, preferably around 120 degrees.
[0036] Based on the above embodiments, in another embodiment of the present invention, such as Figure 4 and Figure 6 As shown, the gear 15 on the second shaft 5 includes several second gear teeth 12. The second gear teeth 12 are respectively provided with a third guide angle R3 and a fourth guide angle R4. The angles of the third guide angle R3 and the fourth guide angle R4 are the same as the angles of the first guide angle and the second guide angle R2, that is, they are also between 110 degrees and 130 degrees, preferably around 120 degrees.
[0037] Based on the above embodiments, in another embodiment of the present invention, such as Figure 4 and Figure 6 As shown, the extension of the hypotenuse of the third guide angle R3 and the extension of the hypotenuse of the fourth guide angle R4 of the second gear tooth 12 form the second angle 13. The second angle 13 is the same as the first angle 11, that is, between 110 degrees and 130 degrees.
[0038] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the gearbox includes a control lever 6, which is mounted on the housing 7. One end of the control lever 6, i.e. the lower end shown in the figure, is provided with a shift fork 1 for shifting gears.
[0039] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the engaging sleeve 2 is provided with a shift fork groove 9. The end of the shift fork 1 facing away from the operating lever 6, that is, the lower end shown in the figure, is placed in the shift fork groove 9. When the operating lever 6 is operated, the lower end of the shift fork 1 moves in the shift fork groove 9, and drives the engaging sleeve 2 to move left and right, thereby realizing the engagement or disengagement of the first shaft 3 and the second shaft 5. In addition, the right end of the second shaft 5 is also provided with a flange 8 for connecting.
[0040] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 and Figure 4 As shown, the end of the second shaft 5 that contacts the first shaft 3, i.e., the left end shown in the figure, is also provided with a friction-resistant copper sleeve 4, which is fitted onto the shaft end of the second shaft 5. More specifically, the left end of the second shaft 5 has a protrusion, and the right end of the first shaft 3 has a recess. The copper sleeve 4 is fitted onto the protrusion and is entirely placed inside the recess, thereby preventing direct friction between the first shaft 3 and the second shaft 5.
[0041] This gearbox structure features a guide angle between 110 and 130 degrees on the first gear 10 of the gear ring 14 of the engagement sleeve 2 and on the gear 15 of the first shaft 3 and the second shaft 5. When the gear ring 14 needs to mesh with the gear 15, the guide angle determines which gear is engaged. This changes the traditional arrangement where the ends of both the gear 15 and the gear ring 14 are flat, making meshing easier and resulting in smoother gear shifting and more time- and labor-saving operation.
[0042] Furthermore, this utility model also proposes an agricultural machine, including a gearbox, which is the gearbox described above. The agricultural machine can be a tractor, and no specific limitation is made here.
[0043] Agricultural machinery with this structure, correspondingly, possesses the advantages of the aforementioned gearboxes.
[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A gearbox for use in agricultural machinery, characterized in that, The device includes a housing, inside which a first shaft and a second shaft are provided. The second shaft is disposed at one end of the first shaft, and the axes of the first shaft and the second shaft coincide. Gears are provided at the joint of the first shaft and the second shaft, and the gears are provided with a coupling sleeve that can connect the first shaft and the second shaft together. The engaging sleeve is provided with a gear ring that can mesh with the gear. The gear ring includes a plurality of first gear teeth. The end faces of the first gear teeth are respectively provided with a first guide angle and a second guide angle of the same size, and the angles of the first guide angle and the second guide angle are between 110 degrees and 130 degrees.
2. The gearbox according to claim 1, characterized in that, The angles of the first guide angle and the second guide angle are between 118 degrees and 122 degrees.
3. The gearbox according to claim 2, characterized in that, The angle between the first guide angle and the second guide angle is 120 degrees.
4. The gearbox according to claim 3, characterized in that, The extension of the hypotenuse of the first guide angle of the first gear tooth and the extension of the hypotenuse of the second guide angle form a first angle, and the first angle is the same in magnitude as the first guide angle and the second guide angle.
5. The gearbox according to claim 4, characterized in that, The gear on the second shaft includes a plurality of second teeth, and the second teeth are respectively provided with a third guide angle and a fourth guide angle. The angles of the third guide angle and the fourth guide angle are the same as the angles of the first guide angle and the second guide angle, respectively.
6. The gearbox according to claim 5, characterized in that, The extension of the hypotenuse of the third guide angle of the second gear tooth and the extension of the hypotenuse of the fourth guide angle form a second angle, which is the same as the first angle.
7. The gearbox according to claim 6, characterized in that, The gearbox includes a control lever, which is mounted on the housing, and one end of the control lever is provided with a shift fork for shifting gears.
8. The gearbox according to claim 7, characterized in that, The engaging sleeve is provided with a shift fork groove, and the end of the shift fork facing away from the control lever is placed in the shift fork groove.
9. The gearbox according to claim 8, characterized in that, The end of the second shaft that contacts the first shaft is also provided with a copper sleeve to prevent friction, and the copper sleeve is fitted onto the shaft end of the second shaft.
10. An agricultural machine, including a gearbox, characterized in that, The gearbox is the gearbox according to any one of claims 1 to 9.