PTO component assembly

Abstract

The utility model relates to a PTO component assembly which comprises a PTO chamber and a PTO gear, a through hole is formed in the PTO chamber, an O-shaped sealing ring is arranged on the outer side of the PTO chamber, and a gear shaft integrally connected to the PTO gear is inserted into the through hole. Two symmetrical single-row tapered roller bearings are arranged between the PTO chamber and the gear shaft, an inner space ring and an outer space ring are arranged between the bearings, and an oil seal is arranged at the rear end to form a sealing structure. The PTO chamber is provided with a rectangular ring groove and an oil return hole between the oil seal and the bearing, the outer ring of the bearing is in clearance fit with the inner wall of the PTO chamber, and the inner ring is in interference fit with the outer circle of the gear shaft. One side of an inner hole of the PTO chamber is provided with threads and a nut, the other side is provided with a boss, and a bearing outer ring is fixed between the nut and the boss; one side of the gear shaft is provided with an annular groove and a bearing retainer ring, the other side is provided with a boss, and a bearing inner ring is fixed between the retainer ring and the boss. An annular groove and an oil hole are formed in the outer space ring, and an oil injection hole is formed in the PTO chamber. The sealing device is compact in structure, good in sealing performance and convenient to install.

Description

Technical Field

[0001] The utility model relates to the field of engines, in particular to a PTO component assembly. Background Art

[0002] In modern industry, engine performance and durability are crucial to the overall operational efficiency of equipment. However, with technological advancements and the continuous expansion of application scenarios, engine operating conditions are becoming increasingly demanding, posing greater challenges to all engine components. The PTO assembly, a key component at the engine's rear end, is particularly under scrutiny for its design and performance, as it serves as the engine's kinetic energy output.

[0003] To adapt to increasingly demanding operating environments, the design of PTO assemblies at the rear of the engine is evolving toward more reliable structures and improved sealing performance. This evolution aims to prevent bearing burns and oil leaks by modifying the PTO's internal structure. This ensures stable output of engine kinetic energy even under high engine temperatures, full load, and even under disruptive shock loads. However, this evolution also presents unprecedented challenges for the PTO's shaft components.

[0004] Traditional PTO components struggle to withstand high loads and high-torque conditions. As PTOs become increasingly common, their ability to withstand the high loads and high-torque shocks from the power output becomes increasingly demanding. These high loads and high-torque shocks not only increase bearing wear but also cause deformation and loosening of oil seals, severely impacting PTO reliability and sealing performance. Utility Model Content

[0005] The purpose of the utility model is to provide a PTO component assembly to solve the problems of poor reliability and sealing performance in the prior art.

[0006] The utility model is implemented by adopting the following technical solutions: a PTO component assembly, characterized in that it includes a PTO chamber and a PTO gear, a through hole is provided in the PTO chamber, a gear shaft is integrally connected to the PTO gear, and the gear shaft is inserted into the through hole from the front end of the PTO chamber, two symmetrical bearings A and bearing B are provided between the PTO chamber and the gear shaft of the PTO gear, an inner spacer and an outer spacer are provided between the bearing A and the bearing B, and an oil seal is provided at the rear end of the PTO chamber to form a sealing structure.

[0007] Furthermore, the PTO chamber is provided with a rectangular annular groove between the oil seal and the bearing B, and is provided with an oil return hole, which passes through the rectangular annular groove from the front end of the PTO chamber to the oil seal mounting surface.

[0008] Furthermore, the bearing A and the bearing B are both single-row tapered roller bearings, the outer rings of the bearings A and B are clearance-fitted with the inner wall of the PTO chamber, and the inner rings of the bearings A and B are interference-fitted with the outer circle of the gear shaft.

[0009] Furthermore, one side of the inner hole of the PTO chamber has a thread and a nut that cooperates with the thread, and the other side is provided with a boss. The outer rings of the bearing A and the bearing B are located between the nut and the boss of the PTO chamber and are fixed by the nut.

[0010] Furthermore, an annular groove is provided on one side of the gear shaft of the PTO gear, a bearing retaining ring is provided in the annular groove, and a boss is provided on the other side. The inner rings of the bearing A and the bearing B are located between the bearing retaining ring and the boss of the gear shaft and are fixed by the retaining ring.

[0011] Furthermore, an annular groove is provided on one side of the inner wall of the PTO chamber on the outer spacer, an oil hole is provided at the bottom of the annular groove, and an oil filling hole communicating with the annular groove is provided on the PTO chamber.

[0012] Furthermore, one end of the gear shaft of the PTO gear is connected to a transmission sleeve, a threaded hole is provided on the end face of the gear shaft, a spline is provided on the outer circle, and the transmission sleeve is provided with a positioning hole and an internal spline. The positioning hole positions the transmission sleeve on the gear shaft of the PTO gear, and the internal spline is matched with the PTO gear spline. A gasket is provided on the transmission sleeve, and the transmission sleeve is fixed to the PTO gear by passing a bolt through the gasket and the transmission sleeve and matching it with the threaded hole of the gear shaft.

[0013] The PTO component assembly described in the utility model has the following beneficial effects:

[0014] This patented design utilizes two single-row tapered roller bearings, resulting in a simple and cost-effective design. Single-row tapered roller bearings are readily available as standard components, while the inner and outer spacers can be customized to meet specific requirements, enhancing design flexibility. Furthermore, the steel bearing cage effectively resists horizontal and vertical impact loads, adapting to the high-pressure operating environment of PTO components.

[0015] The oil return hole designed from the PTO chamber to the oil seal effectively solves the risk of oil leakage caused by lubricating oil accumulation at high speeds, ensures smooth return of lubricating oil, and avoids excessive pressure at the oil seal.

[0016] The inner ring of the oil seal contacts the finely polished gear shaft, achieving a finish of Ra0.4, significantly improving sealing performance and oil seal life. Furthermore, the gear shaft is secured by a bearing, minimizing swing during impact and helping maintain sealing effectiveness.

[0017] The oil seal is installed at the rear end to effectively prevent external dust from entering the PTO component and extend the service life of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 A cross-sectional view of a PTO component assembly;

[0020] Figure 2 A schematic diagram of a PTO assembly;

[0021] In the figure, 1-PTO chamber; 2-O-ring; 3-bearing A; 4-bearing B; 5-inner spacer; 6-outer spacer; 7-oil seal; 8-nut; 9-bearing retaining ring; 10-PTO gear; 11-gasket; 12-bolt; 13-transmission sleeve. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0024] like Figure 1-2 As shown, a PTO component assembly includes a PTO chamber 1 and a PTO gear 10, a through hole is provided in the PTO chamber 1, an O-ring 2 is provided on the outside of the PTO chamber 1, a gear shaft is integrally connected to the PTO gear 10, and the gear shaft is inserted into the through hole from the front end of the PTO chamber 1, two symmetrical bearings A3 and bearing B4 are provided between the PTO chamber 1 and the gear shaft of the PTO gear 10, an inner spacer 5 and an outer spacer 6 are provided between the bearing A3 and the bearing B4, an oil seal 7 is provided at the rear end of the PTO chamber 1, and the PTO gear 10 passes through the bearing 3, the inner spacer 5, the bearing 4, and the oil seal 7 in sequence from the front end of the PTO component to form a sealing structure inside the PTO chamber 1.

[0025] The PTO chamber 1 is provided with a rectangular annular groove between the oil seal 7 and the bearing 4. The PTO chamber 1 is also provided with an oil return hole extending from the front end of the PTO chamber 1 to the rectangular annular groove on the oil seal mounting surface. The oil seal 7 contacts the gear shaft on the inside and the inner wall of the PTO chamber 1 on the outside.

[0026] The bearing A3 and the bearing B4 are both single-row tapered roller bearings. The outer rings of the bearings A3 and B4 are clearance-fitted with the inner wall of the PTO chamber 1 , and the inner rings of the bearings A3 and B4 are interference-fitted with the outer circle of the gear shaft.

[0027] One side of the inner hole of the PTO chamber 1 is provided with a thread and a nut 8 that mates with the thread, and the other side is provided with a boss. The outer rings of the bearings A3 and B4 are located between the nut 8 and the boss of the PTO chamber 1 and are fixed by the nut 8. The gear shaft of the PTO gear 10 is provided with an annular groove on one side, in which a bearing retaining ring 9 is provided. The other side is provided with a boss. The inner rings of the bearings A3 and B4 are located between the bearing retaining ring 9 and the boss of the gear shaft and are fixed by the retaining ring 9.

[0028] The inner spacer 5 is located between the inner rings of bearings A3 and B4, and the outer spacer 6 is located between the outer rings of bearings A3 and B4. The outer spacer 6 and inner spacer 5 respectively have clearance fits with the PTO chamber 1 and the gear shaft. An annular groove is provided on the outer spacer 6 on one side of the inner wall of the PTO chamber 1. An oil hole is provided at the bottom of the annular groove. The PTO chamber 1 is provided with an oil filling hole that connects to the annular groove.

[0029] One end of the gear shaft of the PTO gear 10 is connected to a transmission sleeve 13, the end face of the gear shaft is provided with a threaded hole, and a spline is provided on the outer circle. The transmission sleeve 13 is provided with a positioning hole and an internal spline. The positioning hole positions the transmission sleeve 13 on the gear shaft of the PTO gear 10, and the internal spline is matched with the spline of the PTO gear 10. A gasket 11 is provided on the transmission sleeve 13, and the transmission sleeve 13 is fixed to the PTO gear 10 by passing a bolt 12 through the gasket 11 and the transmission sleeve 13 and matching it with the threaded hole of the gear shaft.

[0030] The above embodiments describe the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the scope of protection of the appended claims.

Claims

1. A PTO component assembly, characterized in that: The invention comprises a PTO chamber (1) and a PTO gear (10), wherein a through hole is provided in the PTO chamber (1), a gear shaft is integrally connected to the PTO gear (10), and the gear shaft is inserted into the through hole from the front end of the PTO chamber (1), two symmetrical bearings A (3) and a bearing B (4) are provided between the PTO chamber (1) and the gear shaft of the PTO gear (10), an inner spacer (5) and an outer spacer (6) are provided between the bearings A (3) and B (4), and an oil seal (7) is provided at the rear end of the PTO chamber (1) to form a sealing structure.

2. A PTO component assembly according to claim 1, characterized in that: The PTO chamber (1) is provided with a rectangular annular groove between the oil seal (7) and the bearing B (4), and is also provided with an oil return hole, which extends from the front end of the PTO chamber (1) to the rectangular annular groove on the oil seal mounting surface.

3. A PTO component assembly according to claim 1, characterized in that: The bearing A (3) and the bearing B (4) are both single-row tapered roller bearings. The outer rings of the bearings A (3) and the bearing B (4) are clearance-fitted with the inner wall of the PTO chamber (1), and the inner rings of the bearings A (3) and the bearing B (4) are interference-fitted with the outer circle of the gear shaft.

4. A PTO component assembly according to claim 1, characterized in that: One side of the inner hole of the PTO chamber (1) is provided with a thread and a nut (8) matched with the thread, and the other side is provided with a boss. The outer rings of the bearing A (3) and the bearing B (4) are located between the nut (8) and the boss of the PTO chamber (1) and are fixed by the nut (8).

5. A PTO component assembly according to claim 1, characterized in that: An annular groove is provided on one side of the gear shaft of the PTO gear (10), a bearing retaining ring (9) is provided in the annular groove, and a boss is provided on the other side. The inner rings of the bearing A (3) and the bearing B (4) are located between the bearing retaining ring (9) and the boss of the gear shaft and are fixed by the retaining ring (9).

6. A PTO component assembly according to claim 1, characterized in that: An annular groove is provided on one side of the inner wall of the PTO chamber (1) on the outer spacer (6), an oil hole is provided at the bottom of the annular groove, and an oil injection hole communicating with the annular groove is provided on the PTO chamber (1).

7. A PTO component assembly according to claim 1, characterized in that: One end of the gear shaft of the PTO gear (10) is connected to a transmission sleeve (13), the end face of the gear shaft is provided with a threaded hole, and a spline is provided on the outer circle. The transmission sleeve (13) is provided with a positioning hole and an internal spline, the positioning hole positions the transmission sleeve (13) on the gear shaft of the PTO gear (10), and the internal spline is matched with the spline of the PTO gear (10). A gasket (11) is provided on the transmission sleeve (13), and the transmission sleeve (13) is fixed to the PTO gear (10) by passing a bolt (12) through the gasket (11) and the transmission sleeve (13) and matching it with the threaded hole of the gear shaft.

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