High-precision spiral bevel gear speed reducer

Abstract

The utility model relates to the technical field of speed reducers, and discloses a high-precision spiral bevel gear speed reducer which comprises a box body, the box body is integrally formed and manufactured by high-strength alloy steel, and a reinforcing rib structure is arranged in the box body; the input shaft assembly comprises an input shaft which is installed in the box body, and the input shaft is connected with the box body through a tapered roller bearing. The box body is integrally formed by high-strength alloy steel and is subjected to nitriding treatment, a reinforcing rib structure is arranged in the box body, the spiral bevel gear is made of high-strength carburizing alloy steel, the tooth surface hardness is high, and the high-precision crossed bevel roller bearing has high bearing capacity, so that the speed reducer can bear larger radial and axial loads.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically a high-precision spiral bevel gear speed reducer. Background Technology

[0002] A spiral bevel gear reducer mainly consists of a housing, spiral bevel gears, shafts, and bearings. The housing serves as the outer shell to support and protect the internal components; the spiral bevel gears are the central transmission components, with helical teeth, and a pair of meshing spiral bevel gears can achieve transmission between intersecting shafts; the shafts connect the power source and the working machinery, transmitting power; and the bearings support the shafts and reduce friction.

[0003] Existing spiral bevel gear reducers still have the following problems in use: They still have shortcomings in terms of precision, load capacity, lubrication, and sealing, making it difficult to meet the requirements of high precision, high load, and long-term stable operation. For example, ordinary spiral bevel gear reducers are prone to problems such as gear wear, high noise, and significant vibration during operation, leading to decreased transmission accuracy and shortened equipment lifespan. Some reducers have poorly designed lubrication systems, failing to ensure adequate lubrication of gears and bearings under complex operating conditions, increasing the risk of equipment failure. At the same time, poor sealing performance can easily lead to lubricating oil leakage and the entry of external impurities, further affecting the normal operation of the reducer. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a high-precision spiral bevel gear reducer, which solves the problems mentioned in the background technology.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] Overall Structure: This high-precision spiral bevel gear reducer mainly includes a housing, input shaft assembly, output shaft assembly, lubrication system, and sealing assembly. All components work together to achieve efficient and stable power transmission and speed reduction.

[0009] Enclosure: The enclosure is made of high-strength alloy steel in one piece. This manufacturing method gives the enclosure higher structural strength and rigidity, which can effectively resist deformation and vibration generated during high-load operation. The surface is nitrided to form a hard and dense nitrided layer, which greatly improves the wear resistance and corrosion resistance of the enclosure and extends its service life. The internal reinforcing rib structure further enhances the rigidity of the enclosure and ensures stable support for internal transmission components under complex working conditions.

[0010] Input shaft assembly: The input shaft is mounted inside the housing and connected to the housing via a tapered roller bearing. The inner ring of the tapered roller bearing has an interference fit with the input shaft. This fit ensures a tight connection between the bearing and the shaft, effectively transmitting torque and preventing relative slippage during high-speed rotation. The outer ring has a transition fit with the bearing mounting hole in the housing, ensuring accurate bearing installation and facilitating installation and disassembly. One end of the input shaft extends out of the housing and is equipped with a clamp-type locking mechanism for connecting the drive motor. This clamp-type locking mechanism includes a clamp and a locking nut. The clamp is fitted onto the input shaft. By tightening the locking nut, the clamp can tightly hold the output shaft of the drive motor, achieving a reliable power connection. This connection method is convenient and quick to install, can adapt to motor output shafts of different diameters, and has good stability during high-speed, high-torque transmission. The other end of the input shaft is fixedly connected to a first spiral bevel gear. The first spiral bevel gear is made of high-strength carburized alloy steel and, after carburizing and quenching treatment, the tooth surface hardness reaches HRC58. The 62 design gives the gears extremely high wear resistance and fatigue strength. At the same time, the gears are precision ground to a precision level of AGMA12 or higher, ensuring high precision and low noise in gear meshing and achieving smooth and accurate power transmission.

[0011] Output shaft assembly: The output shaft is also installed in the housing and connected to the housing via a high-precision cross-angle roller bearing. The high-precision cross-angle roller bearing has high rotational accuracy and load-bearing capacity, and can effectively withstand the radial and axial loads on the output shaft during operation, ensuring stable operation of the output shaft. One end of the output shaft is fixedly connected to a second spiral bevel gear that meshes with the first spiral bevel gear. The material, heat treatment, and machining accuracy of the second spiral bevel gear are the same as those of the first spiral bevel gear. The two work together to achieve high-precision, high-torque power transmission and steering change. The other end of the output shaft extends out of the housing as the power output end. The power output end of the output shaft is equipped with a spline structure or a flat key connection structure, which can be conveniently connected to the input shaft of various working machines according to actual working needs, meeting the installation and use requirements of different equipment.

[0012] Lubrication System: The lubrication system includes a lubricating oil sump inside the gearbox, which stores an appropriate amount of lubricating oil to provide lubrication for the gears and bearings inside the reducer. Oil slingers are installed on the input and output shafts. When the input and output shafts rotate, the oil slingers rotate accordingly, splashing the lubricating oil in the sump to form oil mist and droplets, providing splash lubrication to the gear meshing points and bearings. This lubrication method ensures that all critical parts receive sufficient lubrication during reducer operation, reducing friction and wear and improving transmission efficiency. The gearbox also features an oil level observation window, an oil filling hole, and an oil drain hole. The oil level observation window is made of transparent high-strength acrylic glass, allowing operators to easily observe the oil level inside the gearbox and replenish the oil in a timely manner. Both the oil filling and drain holes are equipped with sealing plugs. To add or replace lubricating oil, simply open the plug; after operation, tighten the plug to ensure the gearbox's seal and prevent lubrication leakage. In addition to preventing oil leakage and the entry of external impurities, the lubrication system also includes a lubricating oil cooling device. This device includes cooling water pipes and cooling coils installed in the lubricating oil sump. The cooling water pipes are connected to an external cooling water source, and the cooling coils are made of copper tubing with good thermal conductivity. During long-term operation of the reducer, when the lubricating oil temperature rises, the circulating cooling water cools the lubricating oil in the lubricating oil sump, ensuring that the lubricating oil temperature remains within a reasonable range, guaranteeing the performance and lubrication effect of the lubricating oil, and extending the service life of the equipment. Inside the housing, oil baffles are installed around the first and second spiral bevel gears. The oil baffles are made of thin stainless steel plates, and their shape and position are carefully designed to guide splashed lubricating oil to evenly cover the gear meshing area, so that the gears are fully lubricated. At the same time, the oil baffles can prevent excessive accumulation of lubricating oil in the non-working area of ​​the gears, avoiding energy loss and oil churning and heating, and improving lubrication efficiency and energy utilization.

[0013] Sealing components: Double-lip skeleton oil seals are installed at the points where the input and output shafts extend out of the housing. The lips of the double-lip skeleton oil seals fit tightly against the shaft surface, forming a double sealing barrier. This effectively prevents lubricating oil from leaking to the outside of the housing and also prevents external dust, impurities, and other foreign objects from entering the housing. This protects the transmission components inside the reducer from contamination and ensures the normal operation of the reducer. Oil-resistant rubber gaskets are installed at the mating surfaces of the housing to further enhance the sealing performance of the housing and prevent lubricating oil from seeping out from the mating surfaces.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, the gearbox is integrally formed from high-strength alloy steel and nitrided, with internal reinforcing ribs. The spiral bevel gear is made of high-strength carburized alloy steel with high tooth surface hardness. The high-precision cross-angle roller bearing has high load-bearing capacity. These designs enable the reducer to withstand large radial and axial loads.

[0016] 2. In this utility model, the double sealing design of double-lip skeleton oil seal and oil-resistant rubber sealing gasket can effectively prevent lubricating oil leakage and external impurities from entering, keep the inside of the reducer clean, reduce the probability of equipment failure, and reduce maintenance costs.

[0017] 3. In this utility model, the housing is provided with multiple mounting holes that conform to international standard installation specifications, which facilitates installation and fixation on different equipment. The clamp-type locking mechanism of the input shaft can easily connect to the output shaft of the drive motor of different diameters. The spline structure or flat key connection structure of the output shaft can adapt to the input shaft connection requirements of various working machines. Moreover, the reducer can be installed in various ways, such as horizontal or vertical, according to the actual production line layout, which has high installation flexibility. Attached Figure Description

[0018] Figure 1 This is a perspective view of the entire utility model;

[0019] Figure 2 This is a perspective view of the upper part of the box body of this utility model;

[0020] Figure 3 This is a perspective view of the lower end of the box body of this utility model;

[0021] Figure 4 This is a perspective view of the speed reduction transmission structure of this utility model.

[0022] In the diagram: 1. Housing; 2. Input shaft assembly; 3. Output shaft assembly; 4. Bolt assembly; 5. Lubricating oil reservoir; 6. First mounting hole; 7. Second mounting hole; 8. Locating key; 9. Balance block; 10. First spiral bevel gear; 11. Second spiral bevel gear. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figures 1-4 In this embodiment of the utility model, the high-precision spiral bevel gear reducer includes a housing 1. The housing 1 is made of high-strength alloy steel in one piece, and the surface is nitrided, which has wear-resistant and corrosion-resistant properties. The housing 1 is also provided with a reinforcing rib structure to enhance its rigidity.

[0027] Input shaft assembly 2 is installed inside housing 1. The input shaft is connected to housing 1 via tapered roller bearings. The inner ring of the tapered roller bearings is interference-fitted with the input shaft, and the outer ring is transition-fitted with the bearing mounting hole of housing 1. One end of the input shaft extends out of housing 1 and is equipped with a clamp-type locking mechanism for connecting to the drive motor. The clamp-type locking mechanism includes a clamp and a locking nut. The clamp is fitted onto the input shaft, and the locking nut is tightened to achieve a tight connection with the output shaft of the drive motor. The other end of the input shaft is fixedly connected to a first spiral bevel gear 10. The first spiral bevel gear 10 is made of high-strength carburized alloy steel. After carburizing and quenching, the tooth surface hardness reaches HRC58-62, and it has been precision ground to a precision level of AGMA12 or higher.

[0028] The output shaft assembly 3 is also installed inside the housing 1. The output shaft is connected to the housing 1 via a high-precision cross-angle roller bearing. One end of the output shaft is fixedly connected to a second spiral bevel gear 11 that meshes with the first spiral bevel gear 10. The material, heat treatment, and machining precision of the second spiral bevel gear 11 are the same as those of the first spiral bevel gear 10. The other end of the output shaft extends out of the housing 1 as the power output end. The power output end of the output shaft is provided with a spline structure or a flat key connection structure for connecting the input shaft of the working machine.

[0029] The lubrication system includes a lubricating oil sump 5 inside the housing 1, and oil slinger rings installed on the input and output shafts. When the input and output shafts rotate, the oil slinger rings throw up the lubricating oil in the lubricating oil sump 5 to splash lubricate the gear meshing parts and bearings. At the same time, the housing 1 is provided with an oil level observation window, an oil filling hole, and an oil drain hole. The oil level observation window is made of transparent high-strength organic glass, and the oil filling hole and the oil drain hole are both equipped with sealing plugs.

[0030] The upper end of the housing 1 is provided with a first mounting hole 6, and the lower end of the housing 1 is provided with a second mounting hole 7. The first mounting hole 6 matches the second mounting hole 7 on the corresponding side and both are equipped with the same bolt assembly 4. The position and size of the mounting holes conform to international standard installation specifications, which facilitates the installation and fixing of the reducer on different equipment. Furthermore, the bottom of the housing 1 is provided with a vibration damping rubber pad mounting groove, which can be used to install vibration damping rubber pads to reduce the vibration transmission during the operation of the reducer.

[0031] The clamp-type locking mechanism in the input shaft assembly 2 also includes a positioning key 8. The positioning key 8 is set on the mating surface of the input shaft and the clamp to ensure the circumferential positioning of the clamp and the input shaft and prevent relative rotation during high speed and high torque transmission. On the output shaft of the output shaft assembly 3, one or more mounting slots are provided at a position away from the second spiral bevel gear 11, where balance blocks 9 can be installed. By adjusting the position and weight of the balance blocks 9, the output shaft is dynamically balanced to ensure the stability of the output shaft during high-speed rotation.

[0032] The lubrication system also includes a lubricating oil cooling device, which includes cooling water pipes and a cooling coil installed in the lubricating oil sump 5. The cooling water pipes are connected to an external cooling water source, and the cooling coil is made of copper pipe with good thermal conductivity. The circulating cooling water cools the lubricating oil in the lubricating oil sump 5, ensuring that the lubricating oil temperature is kept within a reasonable range during long-term operation of the reducer. Inside the housing 1 and around the first spiral bevel gear 10 and the second spiral bevel gear 11, there is an oil baffle plate. The oil baffle plate is made of stainless steel sheet, and its shape and position are designed to guide the splashed lubricating oil to evenly cover the gear meshing area, while preventing excessive accumulation of lubricating oil in the non-working area of ​​the gear, which would cause energy loss and oil turbulence and heat generation.

[0033] The input shaft assembly 2 and the output shaft assembly 3 are provided with sealing components at the parts that extend out of the housing 1. The sealing components include double-lip skeleton oil seals, and the lips of the double-lip skeleton oil seals are in close contact with the shaft surfaces of the input shaft assembly 2 and the output shaft assembly 3.

[0034] The working principle of this utility model is as follows: Before using this high-precision spiral bevel gear reducer, first check whether the reducer's appearance is damaged, whether the connections of each component are firm, and whether the lubricating oil level is normal. After confirming that everything is correct, connect the drive motor to the input shaft of the reducer through a clamp-type locking mechanism to ensure a reliable connection. Start the drive motor and observe the operation of the reducer, checking for any abnormal noise, vibration, or other phenomena. During the operation of the reducer, pay attention to the lubricating oil level in the oil level observation window, and periodically check the temperature of the reducer to ensure that it is within the normal operating range. According to the load of the working machinery, reasonably adjust the speed and output torque of the drive motor to avoid overload operation of the reducer.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision spiral bevel gear reducer, characterized by, include: The box body (1) is made of high-strength alloy steel in one piece, and the box body (1) is provided with a reinforcing rib structure inside; The input shaft assembly (2) includes an input shaft and is installed inside the housing (1). The input shaft is connected to the housing (1) via a tapered roller bearing. The inner ring of the tapered roller bearing is interference-fitted with the input shaft, and the outer ring of the tapered roller bearing is transition-fitted with the bearing mounting hole of the housing (1). One end of the input shaft extends out of the housing (1) and is provided with a clamp-type locking mechanism for connecting to a drive motor. The other end of the input shaft is fixedly connected to a first spiral bevel gear (10). The output shaft assembly (3) includes an output shaft and is also installed in the housing (1). The output shaft is connected to the housing (1) via a high-precision cross-angle roller bearing. One end of the output shaft is fixedly connected to a second spiral bevel gear (11) that meshes with the first spiral bevel gear (10). The material, heat treatment, and machining precision of the second spiral bevel gear (11) are the same as those of the first spiral bevel gear (10). The lubrication system includes a lubricating oil pool (5) set in the housing (1) and an oil slinger ring installed on the input shaft and the output shaft. The housing (1) is provided with an oil level observation window, an oil injection hole, and an oil drain hole. The oil level observation window is made of transparent high-strength organic glass. The oil injection hole and the oil drain hole are both provided with sealing plugs.

2. The high-precision spiral bevel gear reducer according to claim 1, characterized in that: The upper end of the box (1) is provided with a first mounting hole (6), and the lower end of the box (1) is provided with a second mounting hole (7). The first mounting hole (6) matches the second mounting hole (7) on its corresponding side and both are equipped with the same bolt assembly (4). The bottom of the box (1) is provided with a shock-absorbing rubber pad mounting groove.

3. The high-precision spiral bevel gear reducer according to claim 1, characterized in that: The clamp-type locking mechanism in the input shaft assembly (2) also includes a positioning key (8), which is located on the mating surface between the input shaft and the clamp.

4. The high-precision spiral bevel gear reducer of claim 1, wherein: The output shaft assembly (3) has an output shaft and a mounting slot for mounting a balance block (9) at a position away from the second spiral bevel gear (11).

5. The high-precision spiral bevel gear reducer according to claim 1, characterized in that: The lubrication system also includes a lubricating oil cooling device, which includes a cooling water pipeline and a cooling coil installed in the lubricating oil sump (5). The cooling water pipeline is connected to an external cooling water source.

6. The high-precision spiral bevel gear reducer according to claim 1, characterized in that: An oil baffle is provided inside the housing (1) and around the first spiral bevel gear (10) and the second spiral bevel gear (11), and the oil baffle is made of stainless steel sheet.

7. The high-precision spiral bevel gear reducer according to claim 1, characterized in that: The input shaft assembly (2) and the output shaft assembly (3) are provided with sealing components at the parts that extend out of the housing (1). The sealing components include double-lip skeleton oil seals, and the lips of the double-lip skeleton oil seals are in close contact with the shaft surfaces of the input shaft assembly (2) and the output shaft assembly (3).

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