A manual gearbox

Abstract

The utility model discloses a manual gearbox, including gearbox body: the inside installation of gearbox body has input shaft, transmission shaft and rotation axis, input shaft one end has installed first gear shift gear set, and transmission shaft end part has installed second gear shift gear set and first transmission gear respectively, and rotation axis end part has installed second transmission gear, make transmission shaft with input shaft and rotation axis rotation connection, wherein, first gear shift gear set one side is installed with gear shift slider, and gear shift slider is connected with gear shift connecting rod rotation, and gear shift connecting rod is connected with gear shift axle rotation, and gear shift axle is connected with gear shift handle rotation, the utility model discloses, transmission shaft with input shaft and rotation axis are connected through gear shift gear set and bevel gear set rotation, and realize multi -gear shift adjustment and power transmission through gear shift handle manual operation gear shift connecting rod drive gear shift slider adjustment gear set, and the whole structure is simple, and the cost is low, and transmission efficiency is high, and maintenance is convenient, can be nimblely responded to different operation working condition, and effectively promote operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, specifically to a manual gearbox. Background Technology

[0002] The gearbox is the core component of the power transmission system of mechanical equipment. One end is connected to the engine output, and the other end is connected to the moving end through the drive shaft. Its core function is to achieve efficient power transmission and flexible adjustment of speed and torque by switching different gear combinations, under the premise that the engine speed and torque range are relatively fixed.

[0003] Currently, most commonly used machinery and equipment adopts a single and limited speed mode. In light-load scenarios, time is wasted because the speed cannot be increased, while in heavy-load scenarios, frequent jams occur because the speed is difficult to adapt. For example, agricultural seeders cannot flexibly match the work rhythm when dealing with different densities and plot flatness, which significantly increases the overall work process time. Moreover, fixed speed can easily lead to omissions and repetitions at the operational level. For example, if the agricultural seeder is fixed at a certain speed, there will be missed sowing or double sowing when the soil hardness is uneven, which will further affect the work quality and the progress of subsequent processes. Utility Model Content

[0004] The purpose of this utility model is to provide a manual transmission to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] The gearbox housing is equipped with an input shaft, a drive shaft, and a rotating shaft.

[0007] The input shaft is equipped with a first gear set at one end, the transmission shaft is equipped with a second gear set and a first transmission gear at the other end, and the rotating shaft is equipped with a second transmission gear at the other end, so that the transmission shaft is rotatably connected to the input shaft and the rotating shaft.

[0008] The first gear set has a gear shift slider installed on one side. The gear shift slider is rotatably connected to the gear shift linkage. The gear shift linkage is rotatably connected to the gear shift shaft. The gear shift shaft is rotatably connected to the gear shift handle.

[0009] As a further description of the above technical solution, the input shaft and the transmission shaft are arranged parallel to each other inside the gearbox body along a first direction.

[0010] As a further description of the above technical solution, the rotating shaft is disposed inside the gearbox body along the second direction.

[0011] As a further description of the above technical solution, the first gear set and the second gear set are spur gears, and the first transmission gear and the second transmission gear are bevel gears.

[0012] As a further description of the above technical solution, the two ends of the input shaft are respectively rotatably connected to the first bearing, the end of the transmission shaft away from the power end is rotatably connected to the second bearing, and the end of the transmission shaft close to the power end is rotatably connected to the third bearing.

[0013] As a further description of the above technical solution, the first bearing and the second bearing are deep groove ball bearings, and the third bearing is a tapered roller bearing.

[0014] As a further description of the above technical solution, the gearbox body includes a front housing and a rear housing, which are detachably connected.

[0015] As a further description of the above technical solution, a rotating arm is installed on the outer side of the front housing, and an installation plate is installed on the outer side of the rear housing.

[0016] As a further description of the above technical solution, the rotating arm is rotatably connected to the rotating shaft, and a stop washer is provided between the rotating arm and the rotating shaft.

[0017] As a further description of the above technical solution, the mounting plate is rotatably connected to the gear shaft and the gear shift lever, and an indexing pin is inserted into the end of the gear shift lever.

[0018] The beneficial effects of this utility model are as follows:

[0019] In this invention, the transmission shaft is rotatably connected to the input shaft and the rotating shaft through a gear set and a bevel gear set. The gear set is adjusted by manually operating the gear lever and the gear linkage to drive the gear set, thereby achieving multi-speed adjustment and power transmission. The overall structure is simple, low-cost, highly efficient, and easy to maintain. It can flexibly cope with different working conditions and effectively improve work efficiency.

[0020] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the manual transmission of this utility model. Figure 1 ;

[0022] Figure 2 This is the main view of the manual transmission of this utility model. Figure 1 ;

[0023] Figure 3This is a schematic diagram of the structure of the manual transmission of this utility model. Figure 2 ;

[0024] Figure 4 This is the main view of the manual transmission of this utility model. Figure 2 ;

[0025] Figure 5 This is a side view of the manual transmission of this utility model;

[0026] Figure 6 This is an enlarged schematic diagram of the manual transmission of this utility model.

[0027] Figure label:

[0028] 1. Gearbox housing; 101. Front housing; 102. Rear housing; 2. Input shaft; 3. Drive shaft; 4. Rotating shaft; 5. First gear set; 6. Second gear set; 7. First transmission gear; 8. Second transmission gear; 9. Gear shift slider; 10. Gear shift linkage; 11. Gear shift shaft; 12. Gear shift lever; 13. First bearing; 14. Second bearing; 15. Third bearing; 16. Rotating arm; 17. Mounting plate; 18. Locking washer; 19. Indexing pin. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0030] like Figures 1-6 As shown, in one embodiment, a manual transmission includes a transmission body 1: the transmission body 1 is composed of two detachably connected parts, a front housing 101 and a rear housing 102. During installation, it is fastened by high-strength internal hexagon bolts evenly distributed in the circumference. An oil-resistant sealing gasket is also provided at the bolt connection, which can not only ensure the sealing performance of the housing and prevent internal lubricating oil leakage, but also allow for quick disassembly and separation during subsequent maintenance, greatly reducing the difficulty of disassembly and assembly.

[0031] The gearbox housing 1 has an input shaft 2, a drive shaft 3 and a rotating shaft 4 installed inside. Specifically, the input shaft 2 extends out of the housing near the front housing 101 and is used to connect with the power source. The first gear set 5 is installed at the rear end of its shaft.

[0032] Correspondingly, the second gear set 6 and the first transmission gear 7 are respectively installed at the end of the transmission shaft 3. The second gear set 6 is meshed with the first gear set 5 on the input shaft 2, and the first transmission gear 7 is facing the direction of the rotating shaft 4.

[0033] In addition, a second transmission gear 8 is installed at the end of the rotating shaft 4, and the second transmission gear 8 precisely meshes with the first transmission gear 7 on the transmission shaft 3, so that the transmission shaft 3 can be rotatably connected with the input shaft 2 and the rotating shaft 4 to form a power transmission path.

[0034] For example, the input shaft 2 and the drive shaft 3 are along the first direction (in Figure 3 The rotating shaft 4 is arranged parallel to the Y-direction inside the gearbox body 1, with their centerlines in the same vertical plane; correspondingly, the rotating shaft 4 is arranged along the second direction (in the Y direction). Figure 3 The X-direction gear is located inside the gearbox housing 1, and its axis is spatially perpendicular to the axis of the input shaft 2 and the transmission shaft 3. This not only makes full use of the internal space of the housing, but also changes the direction of power transmission through the vertical meshing of the bevel gears, adapting to the power output requirements of different mechanical equipment.

[0035] It should be explained in detail that both ends of the input shaft 2 are rotatably connected to the first bearing 13. Specifically, the first bearing 13 at the front end of the input shaft 2 (the end closer to the front housing 101) is embedded in the pre-set bearing hole of the front housing 101, and the first bearing 13 at the rear end (the end closer to the rear housing 102) is embedded in the corresponding bearing seat of the rear housing 102. Both bearings are fixed to the journal of the input shaft 2 by interference fit, and the outer ring of the bearing and the bearing hole of the housing adopt transition fit to ensure the coaxiality of the input shaft 2 when it is running.

[0036] Correspondingly, the end of the drive shaft 3 away from the power end (i.e. the end closer to the rear housing 102) is rotatably connected to the second bearing 14, which is also embedded in the bearing cavity of the rear housing 102 and is axially positioned by the bearing end cover; the end of the drive shaft 3 close to the power end (i.e. the end closer to the front housing 101) is rotatably connected to the third bearing 15, which is embedded in the bearing seat of the front housing 101.

[0037] For example, the first gear set 5 includes multiple spur gears with different numbers of teeth (e.g., 24, 36, and 48 teeth respectively when adjusting to three gears), and each gear is splined to the input shaft 2 and can slide along the axial direction of the input shaft 2; the second gear set 6 also includes multiple spur gears with different numbers of teeth (e.g., 48, 36, and 24 teeth respectively when adjusting to three gears), and is fixed to the transmission shaft 3 with an interference fit to ensure the load-bearing capacity when the gears are meshing;

[0038] Correspondingly, the first transmission gear 7 and the second transmission gear 8 are bevel gears. The tooth surfaces of the bevel gears are carburized and quenched to improve the wear resistance and fatigue strength of the tooth surfaces and ensure the stability of power transmission.

[0039] In addition, the first bearing 13 and the second bearing 14 can be deep groove ball bearings, which have good radial load capacity and low friction characteristics, and are suitable for the rotational support of the non-heavy-load end of the input shaft 2 and the transmission shaft 3; while the third bearing 15 can be a tapered roller bearing, which can bear both radial and axial loads at the same time, and has a higher load capacity than deep groove ball bearings, which is suitable for the combined load generated by power input near the power end of the transmission shaft 3, and effectively extends the service life of the shaft system.

[0040] Please continue reading. Figures 3-6 In this embodiment, a speed change slider 9 is installed on one side of the first speed change gear set 5. The speed change slider 9 is rotatably connected to one end of the speed change connecting rod 10. The speed change connecting rod 10 is rotatably connected to the speed change shaft 11. The speed change shaft 11 is rotatably connected to the speed change handle 12.

[0041] For example, a rotating arm 16 is installed on the outside of the front housing 101, and an mounting plate 17 is installed on the outside of the rear housing 102;

[0042] Specifically, the rotating arm 16 is rotatably connected to the rotating shaft, and a stop washer 18 is provided between the rotating arm 16 and the rotating shaft;

[0043] Correspondingly, the mounting plate 17 is rotatably connected to the gear shaft 11 and the gear lever 12, and the end of the gear lever 12 is provided with an indexing pin 19.

[0044] Working principle: The drive shaft 3, input shaft 2, and rotating shaft 4 form a complete rotational connection through a transmission gear set (i.e., the first transmission gear set 5 and the second transmission gear set 6) and a bevel gear set (i.e., the first transmission gear 7 and the second transmission gear 8). The power transmission path is: power source → input shaft 2 → first transmission gear set 5 → second transmission gear set 6 → drive shaft 3 → first transmission gear 7 → second transmission gear 8 → rotating shaft 4 → rotating arm 16. When the speed needs to be adjusted, the operator manually moves the gear shift lever 12. The gear shift lever 12 drives the gear shift shaft 11 to rotate around its own axis. The gear shift shaft 11 synchronously drives the gear shift linkage 10 to swing. The gear shift linkage 10 pushes the gear shift slider 9 to slide axially, so that the gear shift slider 9 pushes the gears with different numbers of teeth in the first transmission gear set 5 to mesh, thereby changing the meshing tooth ratio between the first transmission gear set 5 and the second transmission gear set 6, adjusting the speed of the drive shaft 3, and finally realizing the speed adjustment of multiple gears and the stable transmission of power to meet the speed requirements under different working scenarios.

[0045] Through the above technical solution, the overall structure of this application is simple, the cost is low, the transmission efficiency is high, and the maintenance is convenient. It can flexibly cope with different working conditions and effectively improve the working efficiency.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A manual transmission, comprising a detachably connected transmission body (1), characterized in that: The gearbox body (1) is equipped with an input shaft (2), a transmission shaft (3) and a rotating shaft (4); The input shaft (2) is equipped with a first gear set (5) at one end, the transmission shaft (3) is equipped with a second gear set (6) and a first transmission gear (7) at the end, and the rotating shaft (4) is equipped with a second transmission gear (8) at the end, so that the transmission shaft (3) is rotatably connected to the input shaft (2) and the rotating shaft (4); Among them, a speed change slider (9) is installed on one side of the first speed change gear set (5). The speed change slider (9) is rotatably connected to the speed change linkage (10). The speed change linkage (10) is rotatably connected to the speed change shaft (11). The speed change shaft (11) is rotatably connected to the speed change handle (12).

2. The manual transmission according to claim 1, characterized in that, The input shaft (2) and the transmission shaft (3) are arranged parallel to each other in the first direction inside the gearbox body (1).

3. The manual transmission according to claim 1, characterized in that, The rotating shaft (4) is disposed inside the gearbox body (1) along the second direction.

4. The manual transmission according to claim 1, characterized in that, The first gear set (5) and the second gear set (6) are spur gears, and the first transmission gear (7) and the second transmission gear (8) are bevel gears.

5. The manual transmission according to claim 1, characterized in that, The input shaft (2) is rotatably connected to the first bearing (13) at both ends, the transmission shaft (3) is rotatably connected to the second bearing (14) at the end away from the power end, and the transmission shaft (3) is rotatably connected to the third bearing (15) at the end closer to the power end.

6. The manual transmission according to claim 5, characterized in that, The first bearing (13) and the second bearing (14) are deep groove ball bearings, and the third bearing (15) is a tapered roller bearing.

7. The manual transmission according to claim 1, characterized in that, The gearbox body (1) includes a front housing (101) and a rear housing (102), which are detachably connected.

8. The manual transmission according to claim 7, characterized in that, A rotating arm (16) is installed on the outside of the front housing (101), and an mounting plate (17) is installed on the outside of the rear housing (102).

9. The manual transmission according to claim 8, characterized in that, The rotating arm (16) is rotatably connected to the rotating shaft (4), and a stop washer (18) is provided between the rotating arm (16) and the rotating shaft (4).

10. The manual transmission according to claim 8, characterized in that, The mounting plate (17) is rotatably connected to the gear shaft (11) and the gear lever (12), and an indexing pin (19) is inserted into the end of the gear lever (12).

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