Novel 20Kw aluminum alloy PTO gear box

Abstract

The novel 20Kw aluminum alloy PTO gear box comprises a front box cover, an input shaft and a large gear, a rear box cover is installed on the outer side of the rear end of the front box cover, a vent valve is arranged in the upper end of the front box cover in a communicating mode, and an output shaft is installed in the upper end of the rear box cover; an input shaft is installed in the lower end of the front box cover in a penetrating mode, and the rear end of the input shaft is connected with a bearing. A large gear is installed on the outer side of the input shaft. The utility model belongs to the technical field of PTO gear boxes, and aims to solve the problems that in the prior art, a hydraulic system of a tractor is small in flow, a power output shaft and a gear pump are difficult to install, and a small-power gear box is insufficient in power, so that the flow of the gear pump connected with the small-power gear box is insufficient. The technical effect is that the problems that the flow of a hydraulic system of the tractor is small, the power output shaft and the gear pump are difficult to install, and the flow of the gear pump connected with a small-power gear box is insufficient due to insufficient power of the small-power gear box are effectively solved.

Description

Technical Field

[0001] This application relates to the field of PTO gearbox technology, specifically to a novel 20kW aluminum alloy PTO gearbox. Background Technology

[0002] The PTO gearbox is a high-efficiency and reliable transmission device equipped with a PTO interface for easy connection to external devices and to achieve multiple power outputs. It is currently mainly used in agricultural implements with hydraulic systems carried at the rear of tractors and other functional attachments to drive the hydraulic systems of agricultural implements.

[0003] Currently, there are three main methods commonly used to drive the hydraulic systems of agricultural implements: one is to directly draw power from the tractor's own hydraulic system; the second is to directly install a gear pump on the power take-off shaft at the rear of the tractor to provide hydraulic energy to the implement's hydraulic system; and the third is to connect a small-power gearbox and gear pump combination device to the power take-off shaft at the rear of the tractor to provide hydraulic power to the implement's hydraulic system. All three methods have certain drawbacks and limitations, as detailed below:

[0004] 1. Directly drawing power from the tractor's own hydraulic system: Due to the limited space in the engine, small-horsepower tractors can only install gear pumps with a very small displacement, resulting in a small flow rate. At the same time, a large part of this flow rate is used to drive the tractor's own hydraulic system. Therefore, it is only suitable for a few agricultural implements with few hydraulic functions. If you encounter agricultural implements with many functions and need to work continuously with hydraulic systems, the flow rate may not be enough. In this case, you would have to use a high-horsepower tractor to drive these devices, but this would waste fuel and have low work efficiency, resulting in high economic costs.

[0005] 2. Installing a gear pump directly on the power take-off shaft at the rear of the tractor to provide hydraulic power to the agricultural implement hydraulic system is problematic. Currently, tractor power take-off shafts commonly have three speed settings: 540 / 720 / 1000 r / min, and these speeds are even lower at idle. Under low speed and high pressure conditions, the gear pump experiences significant internal leakage, resulting in low volumetric efficiency and severe heat generation. This directly affects the performance and lifespan of the gear pump, negatively impacting the subsequent hydraulic system. Furthermore, directly connecting the gear pump to the power take-off shaft presents installation difficulties and high requirements; poor installation precision will directly affect the gear pump's service life.

[0006] 3. Connecting a small-power gearbox and gear pump combination to the power take-off shaft at the rear of the tractor to provide hydraulic power to the agricultural implement's hydraulic system is limited by the gearbox's power. Insufficient gearbox power restricts the displacement and pressure of the driven gear pump, thus limiting the flow rate the gear pump provides to the subsequent hydraulic system. This may not be suitable for agricultural implements with multiple functions and high flow requirements. Therefore, this application provides a novel 20kW aluminum alloy PTO gearbox to solve the above problems. Utility Model Content

[0007] Therefore, this application provides a novel 20kW aluminum alloy PTO gearbox to solve the existing problems of low flow rate in the tractor's own hydraulic system, difficulty in installing the power output shaft and gear pump, and insufficient power of the small-power gearbox leading to insufficient flow rate of the connected gear pump.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] A novel 20kW aluminum alloy PTO gearbox includes: a front cover, an input shaft, and a large gear. A rear cover is installed on the outer rear end of the front cover, and a vent valve is connected to the upper end of the front cover. An output shaft is installed inside the upper end of the rear cover.

[0010] An input shaft is installed through the lower end of the front cover, and a bearing is connected to the rear end of the input shaft.

[0011] A large gear is mounted on the outside of the input shaft, and a quick-release sleeve assembly is provided on the outside of the front end of the input shaft.

[0012] Furthermore, the front end of the output shaft extends into the upper interior of the front cover, and bolts for fixing are provided at the connection between the front cover and the rear cover.

[0013] Furthermore, an oil sight glass is provided at the lower left side of the front cover, and an oil drain plug is installed at the middle of the lower end of the front cover.

[0014] Furthermore, the rear end of the input shaft extends into the lower end of the rear cover, and the bearing connected to the rear end of the input shaft is located inside the rear cover.

[0015] Furthermore, the large gear is located directly below the output shaft and in front of the bearing.

[0016] Furthermore, the front end of the input shaft extends through to the front interior of the front cover, and the front end of the input shaft is open.

[0017] Furthermore, the quick-release sleeve assembly is located on the lower front side of the front cover;

[0018] Furthermore, the quick-release sleeve assembly (9) includes a collar, a spring, and a ball bearing. The collar is located outside the input shaft (10), and a spring is installed inside the front end of the collar. A ball bearing located inside the input shaft (10) is installed inside the collar.

[0019] Compared with the prior art, this application has at least the following beneficial effects:

[0020] 1. The input shaft is connected and fixed to the tractor's power take-off rod via a quick-release ferrule assembly, while the gear pump is connected to the output shaft. This solves the problem of difficult installation of the tractor's power take-off shaft and gear pump. When the tractor's power take-off rod rotates, it drives the input shaft to rotate synchronously with it. At this time, the large gear rotates under the drive of the input shaft and rotates with the gear structure set on the outer side of the middle of the output shaft, thereby driving the output shaft to rotate. This facilitates the transmission of power from inside the gearbox to the gear pump, solving the problems of low flow rate, low working efficiency, and low economic benefits of the tractor's own hydraulic system.

[0021] 2. With a rated power of 20kW for the entire gearbox, gear pumps with larger displacement and pressure can be installed, solving the problem that insufficient power of small gearboxes leads to insufficient flow of the connected gear pumps. Attached Figure Description

[0022] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are capable of making conventional adjustments or further optimizations to the addition / reduction / classification of certain units, their specific shapes, positional relationships, connection methods, size ratios, etc.

[0023] Figure 1 A schematic diagram of the overall structure of a novel 20kW aluminum alloy PTO gearbox provided in one embodiment of this application;

[0024] Figure 2 A front view structural schematic diagram of a novel 20kW aluminum alloy PTO gearbox provided for one embodiment of this application;

[0025] Figure 3 A rear view structural schematic diagram of a novel 20kW aluminum alloy PTO gearbox provided for one embodiment of this application;

[0026] Figure 4 This is a side view cross-sectional structural schematic diagram of a novel 20kW aluminum alloy PTO gearbox provided for one embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Vent valve; 2. Front cover; 3. Output shaft; 4. Rear cover; 5. Oil sight glass; 6. Drain plug; 7. Bearing; 8. Large gear; 9. Quick clamp assembly; 10. Input shaft. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 4 As shown in the first aspect embodiment of this application, a novel 20kW aluminum alloy PTO gearbox includes: a front cover 2, an input shaft 10, and a large gear 8. A rear cover 4 is installed on the outer rear end of the front cover 2. Bolts for fixing are provided at the connection between the front cover 2 and the rear cover 4. Both the front cover 2 and the rear cover 4 are made of high-strength aluminum alloy material, with a compact structure and good strength and heat dissipation performance. At the same time, the front cover 2 and the rear cover 4 adopt a two-piece design, which facilitates the processing and installation of the gearbox.

[0031] The rear cover has a two-in-one design for its four output terminals. It can be used to install gear pumps with a standard four-hole front cover, or a gear pump with a standard two-hole front cover by adding a positioning ring, making it widely applicable. The gearbox has an overall rated power of 20kW, which can accommodate gear pumps with larger displacement and pressure, solving the problem of insufficient flow of the connected gear pump due to insufficient power of a small gearbox.

[0032] A vent valve 1 is installed inside the upper part of the front cover 2. The vent valve 1 can balance the internal air pressure of the gearbox during operation, reducing the risk of gearbox leakage.

[0033] The upper end of the rear cover 4 is equipped with an output shaft 3. The front end of the output shaft 3 extends to the upper end of the front cover 2. The output shaft 3 is another key component in the gearbox, which is responsible for transmitting the power inside the gearbox to the gear pump.

[0034] An oil sight glass 5 is installed on the lower left side of the front cover 2, and an oil drain plug 6 is installed in the middle of the lower end of the front cover 2. The oil sight glass 5 can monitor the oil level inside the gearbox to ensure sufficient lubrication during gearbox operation. The oil drain plug 6 is used to drain lubricating oil and impurities from the gearbox. When it is necessary to change the lubricating oil or clean the gearbox, the oil drain plug 6 can be unscrewed to allow lubricating oil and impurities to flow out from the plug hole.

[0035] An input shaft 10 is installed through the lower end of the front cover 2, and a bearing 7 is connected to the rear end of the input shaft 10. A large gear 8 is installed on the outer side of the input shaft 10, and a quick-release sleeve assembly 9 is provided on the outer side of the front end of the input shaft 10. The rear end of the input shaft 10 extends to the lower end of the rear cover 4, and the bearing 7 connected to the rear end of the input shaft 10 is located inside the rear cover 4.

[0036] The front end of the input shaft 10 extends through to the front interior of the front cover 2, and the front end of the input shaft 10 is open for easy installation. At the same time, the input shaft 10 is a key component in the gearbox, responsible for transmitting external power to the inside of the gearbox. The quick-release assembly 9 is used to fix the tractor's power take-off rod. The quick-release assembly 9 uses elastic deformation and friction to achieve fastening and connection, which can ensure that the tractor's power take-off rod is stably fixed in the input shaft 10 and prevent it from loosening or falling off during use. The quick-release assembly 9 is located on the lower front side of the front cover 2 and has the characteristics of easy installation and quick disassembly.

[0037] The quick-release sleeve assembly (9) includes a collar, a spring, and a ball bearing. The collar is located outside the input shaft (10), and a spring is installed inside the front end of the collar. A ball bearing located inside the input shaft (10) is installed inside the collar. A circular groove structure adapted to the ball bearing is opened on the outer surface of the tractor power output rod. During installation, the tractor power output rod is first inserted into the input shaft 10. At this time, the toothed structure inside the input shaft (10) positions the tractor power output rod, ensuring the circular groove structure opened on the outer surface of the tractor power output rod. Align with the ball bearing and pull the collar to compress the spring. At this time, the collar moves outside the input shaft 10. Since the diameter of the two ends of the collar is larger than the diameter of the middle part, the ball bearing moves out of the input shaft (10) as the collar moves. Then, fully insert the tractor power take-off rod into the input shaft (10), release the collar, deform the spring, and drive the collar and ball bearing to return to their original positions. The part of the ball bearing extending into (10) engages with the tractor power take-off rod through the circular groove structure. The quick installation can be completed by the quick-release sleeve assembly 9.

[0038] The large gear 8 is located directly below the output shaft 3. A gear structure is provided on the outer side of the middle part of the output shaft 3. The large gear 8 is one of the transmission components in the gearbox. It meshes with the gear structure provided on the outer side of the output shaft 3. The bearing 7 is installed in the shaft hole of the input shaft 10 to support the rotational movement of the input shaft 10 and reduce friction and wear.

[0039] During installation, the input shaft 10 is connected and fixed to the tractor's power take-off rod via the quick-release assembly 9, and the gear pump is connected to the output shaft 3. This solves the problem of difficult installation of the tractor's power take-off rod and gear pump. When the tractor's power take-off rod rotates, it drives the input shaft 10 to rotate synchronously with it. At this time, the large gear 8 rotates under the drive of the input shaft 10 and rotates with the gear structure set on the outer side of the middle of the output shaft 3, thereby driving the output shaft 3 to rotate. This facilitates the transmission of power from inside the gearbox to the gear pump, solving the problems of low flow rate, low working efficiency, and low economic benefits of the tractor's own hydraulic system.

[0040] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A new 20Kw aluminium alloy PTO gearbox comprising a front cover (2), an input shaft (10) and a bull gear (8), characterized in that, The rear end outer side of the front box cover (2) is provided with a rear box cover (4), and the upper end inner side of the front box cover (2) is provided with a breather valve (1), and the upper end inner side of the rear box cover (4) is provided with an output shaft (3); The lower end inner side of the front box cover (2) is provided with an input shaft (10), and the rear end of the input shaft (10) is connected with a bearing (7); The outer side of the input shaft (10) is provided with a large gear (8), and the front end outer side of the input shaft (10) is provided with a quick sleeve assembly (9).

2. A novel 20Kw aluminum alloy PTO gearbox as claimed in claim 1, wherein, The front end of the output shaft (3) extends to the upper end inner side of the front box cover (2), and the connecting part of the front box cover (2) and the rear box cover (4) is provided with a bolt for fixing.

3. A novel 20Kw aluminum alloy PTO gearbox as claimed in claim 2, wherein, The left lower end of the front box cover (2) is provided with an oil mirror (5), and the lower end middle part of the front box cover (2) is provided with a drain plug (6).

4. A new 20Kw aluminum alloy PTO gearbox as claimed in claim 1, wherein, The rear end of the input shaft (10) extends to the lower end inner side of the rear box cover (4), and the bearing (7) connected with the rear end of the input shaft (10) is located in the inner side of the rear box cover (4).

5. A new 20Kw aluminum alloy PTO gearbox as claimed in claim 1, characterized in that, The large gear (8) is located directly below the output shaft (3), and the large gear (8) is located in front of the bearing (7).

6. A new 20Kw aluminum alloy PTO gearbox as claimed in claim 1, characterized in that, The front end of the input shaft (10) extends to the inner side of the front side of the front box cover (2), and the front end of the input shaft (10) is provided in an open type.

7. A new 20Kw aluminum alloy PTO gearbox as claimed in claim 1, wherein, The quick sleeve assembly (9) is located at the lower end front side of the front box cover (2).

8. A new 20Kw aluminum alloy PTO gearbox as claimed in claim 1, characterized in that, The quick sleeve assembly (9) comprises a sleeve ring, a spring and a ball, the sleeve ring is located on the outer side of the input shaft (10), the front end inner side of the sleeve ring is provided with a spring, and the inner side of the sleeve ring is provided with a ball located in the input shaft (10).

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