Two-gear transmission for driving agricultural machine to work through hydraulic motor

Abstract

The two-gear transmission comprises an input shaft and an output shaft, the front end of the output shaft is connected with a front drive, the rear end of the output shaft is connected with a power take-off mechanism, a low-gear driving gear and a high-gear driving gear are fixedly arranged on the input shaft, and a low-gear driven gear and a high-gear driven gear are movably arranged on the output shaft. The low-gear driving gear and the high-gear driving gear are constantly meshed with the low-gear driven gear and the high-gear driven gear respectively, and a gear shifter capable of being selectively connected with the low-gear driven gear or the high-gear driven gear is arranged on the portion, between the low-gear driven gear and the high-gear driven gear, of the output shaft. The large-speed-ratio transmission has the advantages that compared with an existing large-speed-ratio transmission needing complex structures such as an intermediate shaft, the large-speed-ratio transmission is simpler in structure and smaller in size.

Description

Technical Field

[0001] This utility model relates to a two-speed transmission for hydraulic motor-driven agricultural machinery, belonging to the field of agricultural machinery drive technology. Background Technology

[0002] One type of agricultural machinery, such as rice harvesters, needs to power both the harvester and the harvesting actuators while simultaneously moving the harvester across the field. Furthermore, the traveling speed must match the harvesting speed; the faster the traveling speed, the faster the harvesting speed. When traveling in open areas, the harvesting actuators must stop working. Current harvesters directly use an engine to provide this driving power, but the engine speed is too high, while the operating speed of the harvesting actuators and the traveling speed of the harvester are relatively low. Additionally, the input-output gear ratio of the transmission is too large, resulting in a complex and bulky transmission structure. Utility Model Content

[0003] The technical problem to be solved by this utility model is: how to simplify the transmission structure of the gearbox and reduce its size while meeting the harvesting and traveling requirements of the harvester.

[0004] To address the above problems, the technical solution proposed by this utility model is as follows:

[0005] A two-speed transmission for hydraulic motor-driven agricultural machinery includes an input shaft and an output shaft. The front end of the output shaft is connected to a front drive and the rear end is connected to a power take-off mechanism. A low-gear drive gear and a high-gear drive gear are fixedly arranged on the input shaft, and a low-gear driven gear and a high-gear driven gear are movably arranged on the output shaft. The low-gear drive gear and the high-gear drive gear are constantly meshed with the low-gear driven gear and the high-gear driven gear, respectively. A shifter is provided on the output shaft between the low-gear driven gear and the high-gear driven gear, which can selectively engage with the low-gear driven gear or the high-gear driven gear.

[0006] The gear shifter comprises a low-gear shift tooth fixedly connected to the low-gear driven tooth and a high-gear shift tooth fixedly connected to the high-gear driven tooth, as well as a shift tooth fixedly disposed on the output shaft between the low-gear shift tooth and the high-gear shift tooth and a shift tooth ring sleeved outside the shift tooth.

[0007] The power take-off mechanism includes a power take-off shaft coaxial with the output shaft. A first linkage gear and a second linkage gear are respectively provided at one end of the power take-off shaft near the output shaft and at the other end of the output shaft near the power take-off shaft. A synchronous gear ring is provided between the first linkage gear and the second linkage gear.

[0008] An external spline is installed on the power take-off shaft.

[0009] An internal spline is installed on the power take-off shaft.

[0010] Beneficial effects: It can provide power to both the traveling mechanism and the working mechanism of agricultural machinery at the same time; it only has an input shaft and an output shaft, and compared with the existing high-ratio transmissions that also require a complex structure such as an intermediate shaft, this transmission is smaller in size and simpler in structure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a two-speed transmission for hydraulic motor-driven agricultural machinery. The diagram shows that the power take-off mechanism is an external spline with a power take-off function.

[0012] Figure 2 This is a schematic diagram of a two-speed transmission for hydraulic motor-driven agricultural machinery. The diagram shows that the power take-off mechanism has an internal spline that receives power.

[0013] In the diagram: 1. Input shaft; 101. Low-gear drive gear; 102. High-gear drive gear; 2. Output shaft; 201. Low-gear driven gear; 2011. Low-gear shift gear; 202. High-gear driven gear; 2021. High-gear shift gear; 203. Shift gear; 204. Shift gear ring; 3. Power take-off mechanism; 301. Power take-off shaft; 3011. Linkage gear one; 3012. Linkage gear two; 3013. Synchronous gear ring; 302. External spline; 303. Internal spline; 4. Hydraulic motor; 5. Front drive. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] like Figure 1 As shown, a two-speed transmission for driving agricultural machinery with a hydraulic motor 4 includes an input shaft 1 and an output shaft 2. The front end of the output shaft 2 is connected to a front drive 5, and the rear end is connected to a power take-off mechanism 3. A low-gear drive gear 101 and a high-gear drive gear 102 are fixedly mounted on the input shaft 1. A low-gear driven gear 201 and a high-gear driven gear 202 are movably mounted on the output shaft 2. The low-gear drive gear 101 and the high-gear drive gear 102 are constantly meshed with the low-gear driven gear 201 and the high-gear driven gear 202, respectively. A shifter is provided on the output shaft 2 between the low-gear driven gear 201 and the high-gear driven gear 202, which can selectively engage with either the low-gear driven gear 201 or the high-gear driven gear 202. When the shifter is engaged with the low-gear driven gear 201, the output shaft rotates at low speed with high torque; when the shifter is engaged with the high-gear driven gear 202, the output shaft rotates at high speed with low torque. Here, the front drive is used to propel agricultural machinery such as harvesters forward, and the power take-off (PTO) mechanism 3 is used to connect the operating mechanism (such as the harvesting mechanism). Since both the front drive 5 and the PTO mechanism are located on the output shaft 2, the traveling speed and operating speed of the agricultural machinery can be matched. This transmission only uses the input shaft 1 and the output shaft 2. Compared with existing high-ratio transmissions that require complex structures such as intermediate shafts, this transmission is smaller and simpler in structure.

[0016] The aforementioned gear shifter comprises a low-gear shift gear 2011 fixedly connected to the low-gear driven gear 201 and a high-gear shift gear 2021 fixedly connected to the high-gear driven gear 202, a shift gear 203 fixedly disposed on the output shaft 2 between the low-gear shift gear 2011 and the high-gear shift gear 2021, and a shift gear ring 204 sleeved around the shift gear 203. When the shift gear ring 204 is simultaneously engaged with both the low-gear shift gear 2011 and the shift gear 203, the output shaft rotates at a low speed; when the shift gear ring 204 is simultaneously engaged with both the high-gear shift gear 2021 and the shift gear 203, the output shaft rotates at a high speed.

[0017] The aforementioned power take-off mechanism includes a power take-off shaft 301 coaxially adjacent to the output shaft 2. A first linkage gear 3011 and a second linkage gear 3012 are respectively provided at one end of the power take-off shaft 301 near the output shaft 2 and at the other end of the output shaft 2 near the power take-off shaft 301. A synchronous gear ring 3013 is provided between the first linkage gear 3011 and the second linkage gear 3012. When the synchronous gear ring 3013 simultaneously engages with both the first linkage gear 3011 and the second linkage gear 3012, the power take-off shaft 301 rotates, providing power to the agricultural machinery's operating mechanism.

[0018] like Figure 1 , 2 As shown, an external spline 302 or an internal spline 303 is provided on the power take-off shaft 2 for spline connection with the working mechanism of the agricultural machinery.

[0019] The above embodiments are only used to describe the present invention more clearly, and should not be regarded as limiting the scope of protection covered by the present invention. Any equivalent modifications should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. A two-speed transmission for hydraulically driven agricultural machinery, comprising an input shaft (1) and an output shaft (2), characterized in that: The front end of the output shaft (2) is connected to the front drive (5), and the rear end is connected to the power take-off mechanism (3). A low-gear drive gear (101) and a high-gear drive gear (102) are fixedly arranged on the input shaft (1), and a low-gear driven gear (201) and a high-gear driven gear (202) are movably arranged on the output shaft (2). The low-gear drive gear (101) and the high-gear drive gear (102) are constantly meshed with the low-gear driven gear (201) and the high-gear driven gear (202), respectively. A gear shifter is provided on the output shaft (2) between the low-gear driven gear (201) and the high-gear driven gear (202) that can selectively connect to the low-gear driven gear (201) or the high-gear driven gear (202).

2. The two-speed transmission for hydraulic motor-driven agricultural machinery operation according to claim 1, characterized in that: The gear shifter comprises a low-gear shift tooth (2011) fixedly connected to the low-gear driven tooth (201) and a high-gear shift tooth (2021) fixedly connected to the high-gear driven tooth (202), as well as a shift tooth (203) fixedly disposed on the output shaft (2) between the low-gear shift tooth (2011) and the high-gear shift tooth (2021) and a shift tooth ring (204) sleeved outside the shift tooth (203).

3. The two-speed transmission for hydraulic motor-driven agricultural machinery operation according to claim 1, characterized in that: The power take-off mechanism includes a power take-off shaft (301) coaxial with the output shaft (2). At one end of the power take-off shaft (301) near the output shaft (2) and at one end of the output shaft (2) near the power take-off shaft (301), a first linkage gear (3011) and a second linkage gear (3012) are respectively provided. A synchronous gear ring (3013) is provided between the first linkage gear (3011) and the second linkage gear (3012).

4. The two-speed transmission for hydraulic motor-driven agricultural machinery operation according to claim 3, characterized in that: An external spline (302) is provided on the power take-off shaft (301).

5. The two-speed transmission for hydraulic motor-driven agricultural machinery operation according to claim 3, characterized in that: An internal spline (303) is provided on the power take-off shaft (301).

Images