A transmission shaft support seat with oil feeding and discharging structure

Abstract

The utility model relates to transmission shaft support technical field, concretely relates to a transmission shaft support seat with oil inlet and oil outlet structure, including bearing seat assembly, inner rotating shaft, front oil seal and rear oil seal, the bearing seat assembly inner wall, front oil seal and rear oil seal together enclose and form a sealed bearing chamber, be equipped with the oil injection channel and oil discharge channel of intercommunication with bearing chamber on the bearing seat assembly, the oil injection channel is located the upside of inner rotating shaft, and the oil injection channel's entrance place is provided with the oil injection nozzle, the oil discharge channel is located the downside of inner rotating shaft, and the outlet place of oil discharge channel is detachably provided with the obturator, the obturator is sealed to the oil discharge channel, the utility model discloses the oil injection nozzle and oil injection channel are set to the upside of bearing chamber, are used for injecting new lubricating oil, the oil discharge channel is set to the downside of bearing chamber, is used for discharging the lubricating oil of invalid, avoids the mixed use of new and old lubricating oil, has improved lubricating effect, has improved the reliability of bearing operation.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft support technology, specifically to a transmission shaft support seat with an oil inlet and outlet structure. Background Technology

[0002] In heavy vehicles, construction machinery, and other equipment, segmented driveshafts are often used to transmit power. To support multiple driveshaft segments and ensure their smooth operation, intermediate support brackets are commonly used. The core of the intermediate support bracket is the bearing, which requires reliable lubrication to ensure long-term stable operation.

[0003] Currently, common driveshaft intermediate support housings in the industry typically include a bearing chamber for mounting the bearing. To ensure bearing lubrication, an oil filler nozzle and oil filling channel are provided for periodic addition of new lubricating oil. However, existing support housings only have an oil filling structure and lack a dedicated oil drainage structure. Expired lubricating oil remains inside the bearing chamber, causing newly injected lubricating oil to mix with the expired oil, failing to provide adequate lubrication and often leading to rapid bearing failure. Replacing the bearing is time-consuming and labor-intensive. To completely drain the expired lubricating oil from existing driveshaft support housings, most of the components need to be disassembled, which is difficult and time-consuming. Furthermore, frequent disassembly and reassembly can damage seals, affecting sealing performance.

[0004] Therefore, there is an urgent need for a drive shaft intermediate support that allows for quick oil replacement without disassembly. Summary of the Invention

[0005] This invention addresses the problem that existing bearing housings only have an oil injection structure but lack an oil drainage structure. It provides a transmission shaft support housing with both an oil inlet and outlet structure. The oil injection nozzle and channel are located on the upper side of the bearing housing for injecting new lubricating oil, while the outlet channel is located on the lower side of the bearing housing for draining expired lubricating oil. This avoids mixing new and old lubricating oil, improves lubrication efficiency, enhances bearing reliability, and reduces bearing failure rate.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A drive shaft support with an oil inlet and outlet structure includes a bearing housing assembly. An inner rotating shaft is rotatably mounted within the bearing housing assembly via a bearing. A front oil seal and a rear oil seal are located at both ends of the bearing housing assembly, forming a dynamic seal with the inner rotating shaft. The inner wall of the bearing housing assembly, the front oil seal, and the rear oil seal together enclose a sealed bearing chamber. The bearing is located within the bearing chamber. The bearing housing assembly has an oil injection channel and an oil outlet channel communicating with the bearing chamber. The oil injection channel is located on the upper side of the inner rotating shaft, and an oil injection nozzle is provided at the inlet of the oil injection channel. The oil outlet channel is located on the lower side of the inner rotating shaft, and a detachable sealing element is provided at the outlet of the oil outlet channel to seal the oil outlet channel. This design allows for the separate replacement of old and new lubricating oil, avoiding mixing and improving lubrication efficiency and bearing reliability.

[0007] Furthermore, the sealing component is an oil-plugging nut, which is threadedly connected to the outlet of the oil drain channel. It is easy to operate, provides a reliable seal, and is inexpensive.

[0008] Furthermore, the inlet of the oil injection channel is located on the front oil seal side, and the outlet of the oil discharge channel is located on the rear oil seal side. This clarifies the oil circuit layout, allowing the oil inlet and outlet operations to be spatially separated, preventing interference and resulting in a more rational structure.

[0009] Furthermore, the oil injection channel is located at the top of the bearing housing, and the oil injection channel is inverted L-shaped. This facilitates the guidance of lubricating oil flow and positions its inlet on the side for easy filling.

[0010] Furthermore, the oil drain channel is a straight channel extending directly from the lowest point of the bearing chamber, with its central axis angled outwards. This allows the failed lubricating oil to be discharged under the influence of gravity.

[0011] Furthermore, the bearing housing assembly is externally provided with a base for connection to the vehicle frame. The lateral width of the base is greater than the width of the bearing housing, so that the side edge of the base laterally shields the grease nipple and the sealing element. This prevents impact damage and mud and water accumulation, improving the durability of the support under harsh working conditions.

[0012] Furthermore, the base has an I-shaped cross-section. This achieves a lightweight design while ensuring sufficient structural strength and protective capabilities.

[0013] The beneficial effects of this utility model through the above technical solution are as follows: This invention features an oil injection channel and nozzle on the upper side of the bearing housing, and an oil drain channel and sealing element on the lower side of the bearing housing, enabling separate replacement of new and old lubricating oil. The lower oil drain channel and its sealing element facilitate the complete drainage of the degraded old lubricating oil, while the upper oil injection channel and nozzle are used to add new oil, preventing the mixing of new and old lubricating oil, improving lubrication efficiency, enhancing bearing reliability, and reducing bearing failure rate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a utility model Figure 2 Enlarged detail view of point A in the middle; Figure 4 This is a utility model Figure 2 Enlarged detail view of point B in the middle; The numbers in the attached diagram are as follows: 1 is the bearing housing assembly, 2 is the bearing, 3 is the inner shaft, 4 is the front oil seal, 5 is the rear oil seal, 6 is the bearing chamber, 7 is the oil injection channel, 71 is the oil injection nozzle, 8 is the oil drain channel, 81 is the sealing component, and 9 is the base. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-4 As shown, this embodiment provides a drive shaft support with an oil inlet and outlet structure, including a bearing housing assembly 1, an inner rotating shaft 3, a bearing 2, a front oil seal 4, and a rear oil seal 5. The inner rotating shaft 3 is rotatably mounted within the bearing housing assembly 1 via the bearing 2, and the inner rotating shaft 3 passes through the central through hole of the bearing housing assembly 1. The bearing 2 is fixedly mounted on the inner rotating shaft 3 by an interference fit of its inner ring. The outer ring of the bearing 2 is installed in the inner hole of the bearing housing assembly 1 by an interference fit.

[0016] The bearing housing assembly 1 is provided with a front oil seal 4 and a rear oil seal 5 at both ends. The front oil seal 4 and the rear oil seal 5 are respectively press-fitted into the inner holes at both ends of the bearing housing assembly 1, and their sealing lips are interference-fitted with the journal surface of the inner rotating shaft 3 to form a dynamic rotary seal. Thus, the inner wall of the bearing housing assembly 1, the front oil seal 4 and the rear oil seal 5 together enclose a sealed bearing chamber 6 for storing lubricating oil, and the bearing 2 is located in the bearing chamber 6.

[0017] The bearing housing assembly 1 integrates independent oil injection and drainage structures for separate replacement of new and old lubricating oil. Specifically, the bearing housing assembly 1 is provided with an oil injection channel 7 and an oil drainage channel 8 that communicate with the bearing chamber 6. The oil injection channel 7 is used to inject new lubricating oil, and the oil drainage channel 8 is used to drain the exhausted lubricating oil, thereby avoiding the mixing of new and old lubricating oil and improving the lubrication effect.

[0018] The oil injection channel 7 is located on the upper side of the inner rotating shaft 3, and a standard grease nipple 71, such as a general-purpose grease nipple, is installed at the inlet of the oil injection channel 7 via a threaded connection. Preferably, the oil injection channel 7 is located at the top of the bearing housing 6, and the oil injection channel 7 is inverted L-shaped. Specifically, this can be achieved by drilling a horizontal hole in the bearing housing assembly 1 that communicates with the top of the bearing housing 6. The inverted L-shaped structure facilitates the flow of lubricating oil and places its inlet on the side of the bearing housing assembly 1 for easy filling.

[0019] The oil drain channel 8 is located below the inner rotating shaft 3, and a sealing element 81 is detachably installed at the outlet of the oil drain channel 8 to seal the oil drain channel 8. In one possible implementation, the sealing element 81 is an oil-plugging nut, which is threadedly connected to the outlet of the oil drain channel 8. The thread specification can be a metric fine thread or a pipe thread, and a sealing washer or a tapered thread seal can be provided on the end face of the oil-plugging nut to enhance sealing reliability.

[0020] Preferably, the oil drain channel 8 is a straight channel directly leading out from the lowest point of the bearing chamber 6. The central axis of the oil drain channel 8 is inclined to the outside, which is conducive to the complete and smooth flow of the failed lubricating oil by gravity, ensuring thorough oil draining.

[0021] In one possible implementation, the inlet of the oil filling channel 7 is located on the front oil seal 4 side, and the outlet of the oil drain channel 8 is located on the rear oil seal 5 side. This axially separated layout ensures that the filling and draining operations do not interfere with each other.

[0022] The bearing housing assembly 1 is externally provided with a base 9 for connection to the vehicle frame, and the base 9 is connected to the vehicle frame by bolts. To protect the exposed grease nipple 71 and sealing element 81 from impacts under harsh vehicle chassis conditions, the lateral width of the base 9 is greater than the width of the bearing housing 6. This allows the side edge of the base 9 to form a cantilever structure when viewed from the side, thereby laterally shielding the grease nipple 71 and the sealing element 81. As a preferred embodiment, to achieve lightweight while ensuring structural strength, the cross-section of the base 9 is I-shaped.

[0023] The working principle of this utility model: When the lubricating oil in the bearing housing 6 needs to be replaced, first unscrew the plug 81 at the outlet of the oil drain channel 8. The old, worn-out lubricating oil will be completely drained through the oil drain channel 8 under gravity. Then, tighten the plug 81 again to seal the oil drain channel 8. Next, use a lubricating oil gun to add new lubricating oil into the oil filling channel 7 through the grease gun nozzle 71. The new oil flows into the bearing housing 6 through the oil filling channel 7, fully lubricating the bearing 2. The entire process does not require disassembling the bearing housing assembly 1 or the oil seal, making the operation simple, time-saving, and labor-saving.

[0024] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A drive shaft support with an oil inlet and outlet structure, comprising a bearing housing assembly (1), wherein an inner rotating shaft (3) is rotatably disposed within the bearing housing assembly (1) via a bearing (2), and a front oil seal (4) and a rear oil seal (5) are disposed at both ends of the bearing housing assembly (1), the front oil seal (4) and the rear oil seal (5) forming a dynamic seal with the inner rotating shaft (3), the inner wall of the bearing housing assembly (1), the front oil seal (4) and the rear oil seal (5) together forming a sealed bearing chamber (6), wherein the bearing (2) is located within the bearing chamber (6), characterized in that, The bearing housing assembly (1) is provided with an oil injection channel (7) and an oil discharge channel (8) communicating with the bearing chamber (6). The oil injection channel (7) is located on the upper side of the inner rotating shaft (3), and an oil injection nozzle (71) is provided at the inlet of the oil injection channel (7). The oil discharge channel (8) is located on the lower side of the inner rotating shaft (3), and a sealing member (81) is detachably provided at the outlet of the oil discharge channel (8). The sealing member (81) seals the oil discharge channel (8).

2. A transmission shaft support with an oil inlet and outlet structure according to claim 1, characterized in that, The sealing component (81) is an oil plug nut, which is connected to the outlet of the oil drain channel (8) by a thread.

3. A transmission shaft support with an oil inlet and outlet structure according to claim 1, characterized in that, The inlet of the oil injection channel (7) is located on the front oil seal (4) side, and the outlet of the oil discharge channel (8) is located on the rear oil seal (5) side.

4. A transmission shaft support with an oil inlet and outlet structure according to claim 1, characterized in that, The oil injection channel (7) is located at the top of the bearing chamber (6), and the oil injection channel (7) is in the shape of an inverted L.

5. A transmission shaft support with an oil inlet and outlet structure according to claim 1, characterized in that, The oil drain channel (8) is a straight channel directly led out from the lowest point of the bearing chamber (6), and the central axis of the oil drain channel (8) is obliquely outward.

6. A transmission shaft support with an oil inlet and outlet structure according to claim 1, characterized in that, The bearing housing assembly (1) is provided with a base (9) for connecting to the frame. The lateral width of the base (9) is greater than the width of the bearing chamber (6) so that the side edge of the base (9) laterally blocks the oil nozzle (71) and the sealing member (81).

7. A transmission shaft support with an oil inlet and outlet structure according to claim 6, characterized in that, The base (9) has an I-shaped cross-section.

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