Small gearbox with differential mechanism
By designing a small gearbox with a differential, and utilizing gear meshing and differential lock functions, the problem of inflexible steering of small mechanical equipment when driving on curves was solved, and stable driving of vehicles under complex road conditions was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2026-03-24
AI Technical Summary
Existing small mechanical equipment cannot adapt flexibly to complex terrain when driving on curves because the left and right wheels rotate at the same speed, resulting in inflexible operation and difficulty in steering.
A small gearbox with a differential was designed to adjust the speed difference between the left and right wheels through gear meshing and differential lock function, so as to achieve flexible steering.
It ensures stable and smooth vehicle operation under various road conditions, improving operational flexibility and vehicle passability.
Smart Images
Figure CN224033036U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of micro gearboxes, and in particular to a small gearbox with a differential. Background Technology
[0002] A miniature gearbox is a multi-purpose gearbox commonly used in small agricultural machinery such as mini tillers, weeders, and snowplows. It reduces manual labor and improves efficiency. Agricultural machinery is typically driven by an electric or gasoline engine with rotating blades or reels, and a miniature gearbox is needed for gear shifting during operation.
[0003] Currently, when using small mechanical equipment, because the left and right wheels rotate at the same speed, and the wheels cannot rotate at the same speed when traveling on curves, it is difficult to achieve the difference in rotation speed when traveling on curves. This makes the machinery less flexible in turning, not easy to adapt to changing and complex terrain, and unable to flexibly turn agricultural implements.
[0004] To address this issue, we designed a small gearbox with a differential. Utility Model Content
[0005] The purpose of this invention is to provide a small gearbox with a differential to solve the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, this utility model provides a small gearbox with a differential, including a housing, a gearbox assembly inside the housing, a fifth rotating shaft rotatably inserted into the housing, a protective shell connected to the fifth rotating shaft, a main gear fixedly sleeved on the protective shell, a first bevel gear rotatably connected inside the protective shell, a second bevel gear meshing with the first bevel gear, a connecting shaft fixedly inserted into the second bevel gear, the connecting shaft rotatably connected to the inner ring of the main gear, and the main gear connected to the gearbox assembly.
[0007] Furthermore, the transmission assembly includes a fourth rotating shaft rotatably connected within the housing. A wide gear is fixedly sleeved on the fourth rotating shaft, meshing with the main gear. A narrow gear is also fixedly sleeved on the fourth rotating shaft, meshing with a first external gear. A third rotating shaft is fixedly inserted into the first external gear, and a first internal gear is fixedly sleeved on the third rotating shaft, positioned to one side of the first external gear. A second internal gear and a second external gear are slidably sleeved on the third rotating shaft, forming a double gear arrangement. A fifth gear meshes with the second internal gear, slidably sleeved on the second rotating shaft. A third gear is fixedly sleeved on the second rotating shaft, meshing with the first internal gear. A fourth gear is slidably sleeved on the second rotating shaft, forming a double gear arrangement. A clutch tooth is also provided on the second rotating shaft. The inner ring of the second gear is inserted into the first rotating shaft, and the first rotating shaft also sleeves a first gear, forming a double gear arrangement.
[0008] Furthermore, a first connecting block is fixedly connected to the clutch teeth, and a clutch shaft is sleeved on the first connecting block. The clutch shaft is rotatably inserted into the outer casing.
[0009] Furthermore, a second connecting block is connected to the first rotating shaft, and a shift shaft is sleeved on the second connecting block, the shift shaft being slidably inserted into the outer casing.
[0010] Furthermore, a third connecting block is connected to the fifth rotating shaft, and a differential lock shaft is sleeved on the connecting block. The differential lock shaft is inserted into the outer casing, and the differential lock shaft drives the differential lock gear to engage with the main gear.
[0011] Furthermore, there are two of each of the first and second bevel gears, which are symmetrically arranged with the connecting shaft as the central axis and their tooth surfaces face each other.
[0012] Furthermore, the outer shell is made of a high-temperature resistant material.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by the driver operating the shift shaft to adjust the gear position, the third gear and the first internal gear are driven to rotate, which in turn drives the third rotating shaft and the first external gear to rotate. The first external gear meshes with the narrow gear to make the fourth rotating shaft and the wide gear rotate. The meshing of the wide gear with the main gear drives the connecting shaft to make the second bevel gear mesh with the first bevel gear to rotate. This can adjust the speed difference between the left and right wheels, ensuring that the vehicle can drive stably and smoothly under various road conditions. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the internal structure of this utility model;
[0015] Figure 2 This is the front view of the present invention;
[0016] Figure 3 This is a diagram showing the internal structure of the outer shell of this utility model.
[0017] In the diagram: 1. First shaft; 101. First gear; 102. Second gear; 2. Second shaft; 201. Third gear; 202. Fourth gear; 203. Fifth gear; 204. Clutch gear; 3. Third shaft; 301. First external gear; 302. First internal gear; 303. Second internal gear; 304. Second external gear; 4. Fourth shaft; 401. Narrow gear; 402. Wide gear; 5. Fifth shaft; 501. Main gear; 502. Protective housing; 503. First bevel gear; 504. Second bevel gear; 505. Connecting shaft; 6. Differential lock shaft; 7. Shift shaft; 8. Clutch shaft; 9. Housing. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Please see Figure 1-3 This utility model provides a technical solution: a small gearbox with a differential, including a housing 9, a gearbox assembly inside the housing 9, a fifth rotating shaft 5 rotatably inserted inside the housing 9, a protective shell 502 connected to the fifth rotating shaft 5, a main gear 501 fixedly sleeved on the protective shell 502, a first bevel gear 503 rotatably connected inside the protective shell 502, a second bevel gear 504 meshing with the first bevel gear 503, a connecting shaft 505 fixedly inserted on the second bevel gear 504, the connecting shaft 505 rotatably connected to the inner ring of the main gear 501, and the main gear 501 connected to the gearbox assembly.
[0020] The tight connection between the main gear 501 and the transmission assembly ensures the continuity and smoothness of power transmission, thereby improving transmission efficiency. The protective shell 502 further protects the internal transmission assembly from damage caused by external factors, thus extending its service life.
[0021] See Figure 1The transmission assembly includes a fourth rotating shaft 4, which is rotatably connected inside the housing 9. A wide gear 402 is fixedly sleeved on the fourth rotating shaft 4 and meshes with the main gear 501. A narrow gear 401 is also fixedly sleeved on the fourth rotating shaft 4 and meshes with a first external gear 301. A third rotating shaft 3 is fixedly inserted inside the first external gear 301. A first internal gear 302 is fixedly sleeved on the third rotating shaft 3 and is located on one side of the first external gear 301. A second internal gear 303 and a second external gear 304 are also slidably sleeved on the third rotating shaft 3. The second internal gear 303 and the second external gear 304 are double gears. A fifth gear 203 is meshed with the second internal gear 303. The fifth gear 203 is slidably sleeved on the second rotating shaft 2. A third gear 201 is also fixedly sleeved on the second rotating shaft 2. The third gear 201 meshes with the first internal gear 302. A fourth gear 202 is also slidably sleeved on the second rotating shaft 2. The fifth gear 203 and the fourth gear 202 are double gears. A clutch tooth 204 is also provided on the second rotating shaft 2. The inner ring of the second gear 102 is inserted into the first rotating shaft 1. The first gear 101 is also sleeved on the first rotating shaft 1. The first gear 101 and the second gear 102 are double gears.
[0022] By employing the meshing and engagement of multiple gears, the transmission assembly can achieve multi-level speed changes, allowing the driver to flexibly adjust the vehicle speed according to driving needs and road conditions. The tight meshing between the gears ensures the continuity and smoothness of the transmission, thereby improving transmission efficiency and reducing energy loss.
[0023] See Figure 2 A first connecting block is fixedly connected to the clutch tooth 204, and a clutch shaft 8 is sleeved on the first connecting block. The clutch shaft 8 is rotatably inserted into the outer shell 9.
[0024] The clutch shaft 8 is rotatably connected to the housing 9, allowing the driver to directly control the rotation of the turntable 204 by manipulating the clutch shaft 8, thereby realizing the clutch function, making the operation more intuitive and convenient, and improving the convenience and comfort of driving.
[0025] See Figure 2 A second connecting block is fixedly connected to the first rotating shaft 1, and a shift shaft 7 is sleeved on the second connecting block. The shift shaft 7 is rotatably inserted into the outer casing 9.
[0026] By directly connecting the shift shaft 7 and the first rotating shaft 1 through the second connecting block, the driver can directly control the rotation of the second rotating shaft 2 by operating the shift shaft 7, thereby adjusting the gear position of the transmission and making the gear shifting process more direct and efficient.
[0027] See Figure 2A third connecting block is fixedly connected to the fifth rotating shaft 5. A differential lock shaft 6 is sleeved on the connecting block. The differential lock shaft 6 is inserted into the outer casing 9. The differential lock shaft 6 is engaged with the main gear 501 through the differential lock gear.
[0028] When the differential lock shaft 6 engages with the main gear 501, the differential function of the differential is locked, meaning that the rotational speeds of the two wheels are forced to synchronize. This is very helpful in improving the vehicle's passability and ability to get out of trouble in special road conditions, such as mud, snow, or rocky roads. When one wheel slips, locking the differential lock shaft 6 can ensure that the other wheel receives sufficient driving force to help the vehicle continue to move forward.
[0029] See Figure 3 There are two of each of the first bevel gear 503 and the second bevel gear 504, which are symmetrically arranged with the connecting shaft 505 as the central axis and their tooth surfaces are opposite each other.
[0030] By setting two of each of the first bevel gear 503 and the second bevel gear 504, not only is the smoothness and efficiency of the transmission improved, but the service life of the gears is also extended, while making the transmission structure more compact and reliable.
[0031] See Figure 2 The outer shell 9 is made of a high-temperature resistant material.
[0032] The outer casing 9 is made of a high-temperature resistant material, which can maintain stability at extremely high temperatures, thereby enhancing the service life of the outer casing 9 and protecting the internal components of the outer casing 9 so that they can operate stably.
[0033] Working principle: When the driver operates the shift shaft 7, the gear position is adjusted via the shift shaft 7. The shift shaft 7 then drives the first gear 101 and the second gear 102, which mesh with the fourth gear 202, the fifth gear 203, and the second internal gear 303 respectively. This, in turn, drives the first internal gear 302 to rotate via the third gear 201, which in turn drives the third rotating shaft 3 to rotate. This, in turn, drives the first external gear 301, which is fixedly sleeved on the third rotating shaft 3, to rotate. Finally, the first external gear 301 drives the meshing gears... The narrow gear 401 rotates, which in turn causes the fourth shaft 4, which is fixedly sleeved with the narrow gear 401, to rotate. Furthermore, the wide gear 402, which is fixedly sleeved on the fourth shaft 4, also rotates, thereby driving the main gear 501, which is meshed with the wide gear 402, to rotate. Subsequently, the connecting shaft 505, which is rotatably connected inside the main gear 501, drives the second bevel gear 504 to mesh with the first bevel gear 503 and rotate. This allows for adjustment of the speed difference between the left and right wheels, ensuring that the vehicle can drive stably and smoothly under various road conditions.
Claims
1. A small gearbox with a differential, comprising a housing (9), wherein a transmission assembly is disposed within the housing (9), characterized in that: A fifth rotating shaft (5) is rotatably inserted inside the outer casing (9). A protective shell (502) is fixedly connected to the fifth rotating shaft (5). A main gear (501) is fixedly sleeved on the protective shell (502). A first bevel gear (503) is rotatably connected inside the protective shell (502). A second bevel gear (504) is meshed on the first bevel gear (503). A connecting shaft (505) is fixedly inserted on the second bevel gear (504). The connecting shaft (505) is rotatably connected to the inner ring of the main gear (501). The main gear (501) is connected to the transmission assembly.
2. A small gearbox with a differential as described in claim 1, characterized in that: The transmission assembly includes a fourth shaft (4), which is rotatably connected inside the housing (9). A wide gear (402) is fixedly sleeved on the fourth shaft (4) and meshes with the main gear (501). A narrow gear (401) is also fixedly sleeved on the fourth shaft (4) and meshes with a first external gear (301). A third shaft (3) is fixedly inserted inside the first external gear (301). A first internal gear (302) is fixedly sleeved on the third shaft (3) and is located on one side of the first external gear (301). A second internal gear (303) is also fixedly sleeved on the third shaft (3). A second external gear is also fixedly sleeved on the third shaft (3). A wheel (304) is connected to a fifth gear (203) meshing with the second internal gear (303). The fifth gear (203) is fixedly sleeved on a second rotating shaft (2). A third gear (201) is also fixedly sleeved on the second rotating shaft (2). The third gear (201) meshes with the first internal gear (302). A fourth gear (202) is also fixedly sleeved on the second rotating shaft (2). A turntable (204) is also provided on the second rotating shaft (2). A second gear (102) meshes with the fourth gear (202). A first rotating shaft (1) is fixedly inserted into the inner ring of the second gear (102). A first gear (101) is also fixedly sleeved on the first rotating shaft (1). The first gear (101) meshes with the third gear (201).
3. A small gearbox with a differential as described in claim 2, characterized in that: A first connecting block is fixedly connected to the turntable (204), and a clutch shaft (8) is sleeved on the first connecting block. The clutch shaft (8) is rotatably inserted into the outer shell (9).
4. A small gearbox with a differential as described in claim 2, characterized in that: A second connecting block is fixedly connected to the first rotating shaft (1), and a shift shaft (7) is sleeved on the second connecting block. The shift shaft (7) is rotatably inserted into the outer shell (9).
5. A small gearbox with a differential as described in claim 1, characterized in that: A third connecting block is fixedly connected to the fifth rotating shaft (5), and a differential lock shaft (6) is sleeved on the connecting block. The differential lock shaft (6) is inserted into the outer shell (9), and the differential lock shaft (6) cooperates with the main gear (501) to abut.
6. A small gearbox with a differential as described in claim 1, characterized in that: The outer shell (9) is composed of two pieces joined together, and the two outer shells (9) are fixed together with screws and nuts.
7. A small gearbox with a differential as described in claim 1, characterized in that: The first bevel gear (503) and the second bevel gear (504) are both two in number, symmetrically arranged with the connecting shaft (505) as the central axis, and their tooth surfaces are opposite each other.
8. A small gearbox with a differential as described in claim 1, characterized in that: The outer shell (9) is made of a high-temperature resistant material.