Drive axle shield system capable of strengthening bearing lubrication and reducing power loss

Abstract

The invention discloses a drive axle shield system capable of strengthening bearing lubrication and reducing power loss, which is applied to the field of vehicle transmission devices. The drive axle shield system comprises a bevel gear shield, a bevel gear side plate and a bevel gear shield, the bevel gear shield and the bevel gear side plate act on the bevel gear to provide a relatively independent space for the bevel gear, an oil outlet in the upper side of the bevel gear shield is tangent to the oil collecting groove, and the bevel gear side plate is horizontal to the bevel gear; the bevel gear shield is used for the bevel gear, a relatively semi-sealed space is provided for the bevel gear, and the shield is a 180-degree semicircle. The bevel gear shield, the bevel gear side plate and the bevel gear shield jointly form a drive axle shield system, lubricating oil can be conveyed to a lubricating oil way on the upper side of a drive axle under the action of the bevel gear shield and the bevel gear side plate, and efficient lubrication and quick response of a bearing are achieved. A sealed space is formed by the drive axle shield system, so that the drive axle is lubricated under the condition that the gear stirs less lubricating oil, and the power loss is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle transmission devices, and in particular to a drive axle shield system capable of enhancing bearing lubrication and reducing power loss. Background Art

[0002] Hypoid bevel gears are widely used in the drive axle transmission system of engineering machinery due to their high load-bearing capacity, lower noise, and smooth transmission. As engineering machinery faces more and more extreme working conditions, the lubrication capacity of the input shaft bearing is higher, and lubrication performance has become an important indicator for measuring heavy-duty engineering machinery.

[0003] In the existing technology, the bearing lubrication in the drive axle main reducer is achieved by the rotation of the bevel gear to drive the lubricating oil. In this design, when the bevel gear rotates at a low speed, the bevel gear rotates and throws the oil insufficiently and untimely, resulting in insufficient oil inlet to the upper oil circuit of the drive axle, short oil storage time, and inability to achieve self-circulation of the lubricating oil, resulting in bearing heating caused by poor bearing lubrication and low bearing service life. In the drive axle main reducer part, after excluding the bevel gear and the differential, there is still a large cavity for storing lubricating oil, so that during the rotation of the bevel gear and the bevel gear, more lubricating oil that does not participate in lubrication is stirred, increasing the oil stirring power loss and heat generation. The design of the drive axle guard system determines whether the bearing can have a good lubrication effect, and whether it can provide a relatively independent working space for the bevel gear and the bevel gear, realize the directional delivery of lubricating oil for the drive axle lubricating oil circuit, and realize stirring less lubricating oil to meet the transmission requirements of the bevel gear and the bevel gear. Therefore, by designing and optimizing the structural design of the gear guard, the problems of insufficient bearing lubrication and excessive oil stirring power loss can be solved. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to solve the problem of excessive oil stirring power loss and insufficient heat exchange of the drive axle.

[0005] The present invention solves the above technical problems through the following technical means:

[0006] The bevel gear shield system in the drive axle shield system is divided into two parts, one part is the bevel gear side plate located on the back of the bevel gear, and the other part is the bevel gear shield located on one side of the bevel gear tooth surface and fixed on the drive axle housing. The two parts are connected by bolts to form a relatively closed shield. There is an oil outlet at the upper end of the bevel gear shield, which is in a tangential relationship with the oil inlet and oil collecting tank on the upper side of the drive axle. The lubricating oil in the bevel gear shield has a certain speed. The lubricating oil after leaving the shield will be transported to the oil inlet on the upper side of the drive axle along the inner wall of the shield in a tangential direction, so as to achieve the effect of efficient lubrication of the bearing. The bevel gear shield system is divided into a bevel gear shield and a bevel gear side plate, which are separated into two parts for easy processing, and interact with the bevel gear and the inner cavity fixing frame of the drive axle for easy assembly; the bevel gear shield in the drive axle shield system is directly formed, easy to process and assemble, and is fixed inside the drive axle by bolt connection, so that the bevel gear is in a relatively sealed space. Both the bevel gear shield and the bevel gear shield are designed as a large arc structure, forming a horizontal relationship with the side of the large end of the gear, and the gap is a variable value according to the actual situation.

[0007] The relative positions of the bevel gear shield, the bevel gear and the differential are determined in the design of the bevel gear side plate and the housing, which facilitates the installation of bevel gears of different sizes and avoids interference between the bevel gear and the bevel gear shield system.

[0008] The horizontal distance between the bevel gear side plate and the back of the bevel gear is 3 mm, and the radial distance between the inner diameter of the bevel gear side plate and the outer diameter of the differential is 3 mm.

[0009] The horizontal distance between the bevel gear shield and the top of the bevel gear tooth surface is 3 mm, and the radial distance between the inner diameter of the bevel gear shield and the tooth top height of the bevel gear is 3 mm.

[0010] The overall arc of the bevel gear shield system is 250°, so that the upper oil outlet is in a tangent relationship with the oil collecting tank in the drive axle, thereby realizing directional delivery of the lubricating oil.

[0011] The radial spacing between the inner diameter of the bevel gear shield and the diameter of the large end face of the bevel gear is 3mm, and the shield height is the distance from the small end face of the bevel gear to the fixing point of the shield plus 3mm.

[0012] The bevel gear shield has an overall arc of 180°, which wraps one side of the bevel gear to prevent irrelevant lubricating oil from participating in the rotational movement of the bevel gear.

[0013] The working principle of the gear guard system of the present invention is that the rotation of the bevel gear alone drives the oil in the bevel gear guard system to move in a directional manner inside. The oil at the guard outlet has a certain speed. When it is free from the constraint of the guard, it will make a parabolic motion in the direction of the tangent at the outlet. Due to the short action distance and fast movement speed, it can be approximately regarded as a linear motion, so that the oil with a certain speed at the guard outlet is directed to the lubricating oil circuit, realizing rapid and large-scale oil supply and efficient self-circulating lubrication, ensuring good lubrication and long service life of the bearing; under the action of the guard system, a relatively independent space is created for the bevel gear, so that the bevel gear can stir less lubricating oil to meet the working requirements, thereby reducing the power loss of the drive axle; and the other bevel gear guard system creates a relatively independent rotating space for the bevel gear, so that less lubricating oil participates in the rotational motion of the helical gear, divides the lubricating oil into a moving part and a stationary part, and accelerates the exchange of internal heat between the two parts of the lubricating oil.

[0014] The beneficial effects of the present invention are as follows: the drive axle shield system is designed to achieve fast, sufficient and long-term oil supply for the lubricating oil circuit; the relatively independent space created by the shield system allows a small amount of oil to participate in the rotational movement of the bevel gear and the bevel gear, thereby reducing power loss; speeding up the heat exchange of the lubricating oil between the stationary part and the moving part, and speeding up the heat dissipation of the drive axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of the drive axle shield system proposed by the present invention that can enhance bearing lubrication and reduce power loss;

[0016] Figure 2 The fixing method of the drive axle shield system, which can enhance bearing lubrication and reduce power loss, and the relative positions of the internal brackets and bolt holes of the drive axle;

[0017] Figure 3 It is the main view after cutting along the AA direction;

[0018] Figure 4 It is the main view after cutting along the BB direction;

[0019] Figure 5 This is the front view of the bevel gear guard;

[0020] Figure 6 It is the front view of the bevel gear guard;

[0021] Figure 7 Data analysis diagram for simulation calculation to verify that the drive axle guard system can enhance bearing lubrication and reduce power loss;

[0022] Figure 8Data analysis diagram for simulation calculation verification that the drive axle guard system can enhance bearing lubrication and reduce power loss and can reduce the oil stirring resistance torque;

[0023] Figure 1 Middle: 1 driving bevel gear, 2 driven bevel gear, 3 bevel gear shield baffle, 4 bevel gear shield threaded hole, 5 bevel gear shield, 6 bevel gear shield threaded hole, 7 differential, 8 bevel gear shield, 9 bevel gear shield threaded hole;

[0024] Figure 7 Middle: Lubricating oil flow rate variation curves of different lubricating oil inlets and outlets;

[0025] Figure 8 Middle: The oil stirring resistance torque variation curves of bevel gears and bevel gears respectively. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Drive axle guard systems that enhance bearing lubrication and reduce power loss, such as Figure 1 , Figure 2As shown, it includes a bevel gear 1, a bevel gear 2, a drive axle housing 11, a bevel gear shield 5, a bevel gear side plate 3, and a bevel gear shield 8; the bevel gear 2 and the bevel gear 1 are both arc bevel gears, and the arc bevel gears are provided with a small end face, a tooth face, a large end face, and a side face; the meshing of the bevel gear 2 and the bevel gear 1 is intersecting axis installation, and the meshing part is not blocked by the drive axle shield system, which is convenient for the exchange of lubricating oil and the delivery of lubricating oil to the upper lubricating oil passage 12; the bevel gear shield system consists of two parts, namely the bevel gear shield 5 and the bevel gear side plate 3, which are assembled to form a relatively sealed double-sided shielding area to achieve the lubrication effect of the drive axle. Under the premise of the effect, less lubricating oil is stirred, thereby reducing the bevel gear oil stirring power loss and enhancing the bearing lubrication effect under low-speed driving; the bevel gear shield 8 and the drive axle inner cavity are combined to prevent a part of irrelevant oil from participating in the rotational movement of the bevel gear, thereby reducing the bevel gear oil stirring power loss; the drive axle housing 11, the bevel gear shield 5, the bevel gear side plate 3, and the bevel gear shield 8 together form a relatively sealed drive axle shield system to achieve the effect of enhancing bearing lubrication and reducing oil stirring power loss; the bevel gear shield 5 is formed by stamping to form a lubricating oil effect of shielding the tooth surface end face and shaft surface of the bevel gear 2, and the flat plate structure processed by the bevel gear side plate 3 shields the bevel gear 2 The bevel gear shield 5 is fixed to the bevel gear shield fixing frame 10 of the drive axle by bolt connection, and the bevel gear side plate 3 is connected to the bevel gear shield 5 through the second bolt hole 4, and the two form a relatively sealed structure; the bevel gear shield 8 is formed into a folded semicircle by stamping, and is connected and fixed to the housing of the input shaft part of the drive axle through the third bolt hole 9; the bevel gear shield fixing frame 10 of the drive axle with the bevel gear shield 5 added inside the drive axle is convenient for installation, and a threaded hole is drilled at the input shaft of the drive axle housing 11 to facilitate the fixing and installation of the bevel gear shield 8; the bevel gear shield fixing frame 10 is processed at the same time as the drive axle housing 11; during the processing, prevent To prevent deformation due to the processed shield being too thin, the thickness of the bevel gear shield 5 and the bevel gear shield 8 is required to be at least 3mm, and the distance between the bevel gear shield 5 and the bevel gear shield 8 and the gear is 3mm to prevent interference caused by assembly errors and affect use; the total angle of the bevel gear shield 5 should be determined according to the geometric position of the bevel gear in the actual drive axle and the oil collecting groove 14 at the upper oil inlet. The bevel gear shield 5 of this example has a wrapping angle of 250°, so that the oil can leave the bevel gear shield system and smoothly enter the upper lubrication oil circuit 12 along the tangent 14; the bevel gear shield 8 has a wrapping angle of 180°, so that the oil on one side hardly participates in the rotational movement of the bevel gear. The above-mentioned drive axle guard structure is a high-loss design, and the guard system formed by the two creates a relatively independent working space for the gears. That is, this structure allows less lubricating oil to participate in the gear rotation movement while meeting the gear lubrication conditions, thereby reducing the gear power loss. The bevel gear guard system allows the lubricating oil to enter the lubricating oil circuit in a directed and rapid manner after being freed from the guard constraints, thereby achieving a strong lubrication effect on the bearings.

[0028] Specific implementation examples Figure 1 As shown, it includes: 1 bevel gear, 2 bevel gear, 3 bevel gear side plate, 4 second bolt hole, 5 bevel gear cover, 6 first bolt hole, 7 differential, 8 bevel gear cover, 9 third bolt hole, 10 bevel gear cover fixing frame, 11 drive axle housing, 12 lubricating oil passage on the upper side of the drive axle, and 13 oil collecting tank;

[0029] Specific installation example Figure 2 As shown, the bolts fix the bevel gear shield 5 to the bevel gear shield fixing frame 10 inside the drive axle through the first bolt hole 6, and the bolts fix the bevel gear side plate 3 to the bevel gear shield 5 through the second bolt hole 4; the bolts fix the bevel gear shield 8 to the drive axle housing 11 through the third bolt hole 9;

[0030] In order to ensure that sufficient lubricating oil enters the shield system, the oil inlet of the bevel gear shield 8, i.e. the tangent of the lowest end of the shield, is required to be level with the oil, and the oil inlet of the bevel gear shield 5 is in the tangent direction with the oil inlet at the lower end of the drive axle housing, which is convenient for fixing and installation, and controls a certain amount of lubricating oil to enter the bevel gear shield;

[0031] Furthermore, in order to ensure that the bevel gear 1 and the bevel gear 2 can mesh normally and reduce the oil stirring power loss, too large or too small a distance between the shield and the gear is not conducive to reducing the oil stirring power loss. Therefore, under the condition of meeting the assembly requirements, the distance between the inner wall of the shield and the tooth surface is controlled to about 3mm as much as possible to achieve the best effect to reduce the oil stirring power loss.

[0032] Furthermore, the angle of the bevel gear shield 5 is controlled so that the lubricating oil after being separated from the inner wall of the outlet end of the bevel gear shield 5 is ejected along the tangential direction 14, maintaining a certain angle to achieve the best separation position of the lubricating oil;

[0033] Furthermore, after the shield system and the drive axle are assembled, it is necessary to verify through tests as much as possible that the drive axle can work for a long time to achieve the best working condition.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drive axle shield system capable of enhancing bearing lubrication and reducing power loss, characterized in that: The invention comprises a bevel gear shield (5) and a bevel gear shield (8); the bevel gear shield (5) is fixed to a fixed bracket inside a drive axle through a first bolt hole (6); the bevel gear side plate (3) is connected to the bevel gear shield (5) through a second bolt hole (4) to form a sealing area; the bevel gear shield (5) is conveniently processed into a right-angle structure, an axial gap d1 and a radial gap d2 between the bevel gear shield (5) and the bevel gear (2) are determined, and lubricating oil is stored in the right-angle structure; the bevel gear shield (8) is fixed to the inner wall surface of the drive axle through a third bolt hole (9); the bevel gear shield (8) is connected to the inner wall surface of the drive axle by means of a second bolt hole (4 ... connected to the inner wall surface of the drive axle by means of a second bolt hole (4) to form a sealing area; the bevel gear shield (5) is connected to the inner wall surface of the drive axle by means of a second bolt hole (4) to form a sealing area; the bevel gear shield (5) is connected to the inner wall surface of the drive axle by means of a second bolt hole (4) A sealing area is formed at the input shaft end of the bridge, and the bevel gear shield (8) is also a right-angle arc structure. While blocking external oil, it also stores lubricating oil for the bevel gear (1); the bevel gear shield (5), the bevel gear side plate (3), the bevel gear shield (8) and the inner cavity of the drive bridge form a drive bridge shield system that strengthens bearing lubrication and reduces power loss. The space of the drive bridge shield system is relatively independent and sealed, and the meshing side of the gear is reserved for the bevel gear and the helical gear, so that part of the lubricating oil quickly and directionally transported to the oil collecting tank of the drive bridge is used to supply oil to the bearing, and part of it is used to supply oil to the gear meshing position.

2. A drive axle shield system capable of enhancing bearing lubrication and reducing power loss according to claim 1, characterized in that: The bevel gear shield (5) is installed inside the drive axle, and the bevel gear side plate (3) fixes the bevel gear shield (5), and the two act together on the bevel gear (2). Gears, bearings, etc. are installed inside the shield system located inside the drive axle. The lower oil inlet of the bevel gear shield (5) is completely immersed in lubricating oil, and the inner wall surface of the upper oil outlet of the bevel gear shield (5) is tangential to the oil collecting tank of the drive axle. The bevel gear shield (5) and the bevel gear side plate (3) are separated.

3. The drive axle shield system capable of enhancing bearing lubrication and reducing power loss according to claim 1, characterized in that: The bevel gear shield (8) is fixed to the inner cavity of the input end of the drive axle and acts on the bevel gear (1). The oil inlet at the lower end of the bevel gear shield (8) is completely immersed in lubricating oil. The upper oil outlet of the bevel gear shield (8) is 180 degrees from the oil inlet, which is convenient for engineering processing and manufacturing. The 180-degree outlet of the bevel gear shield (8) provides lubricating oil to the gear meshing area in time. The bevel gear shield (8) and the inner cavity of the drive axle are separated.

4. The bevel gear shield system in the drive axle shield system capable of enhancing lubrication and reducing power loss according to claim 2, characterized in that: The bevel gear shield system consists of two parts, one part is a bevel gear side plate (3) located on the side of the bevel gear (2), and the other part is a bevel gear shield (5) located on the side of the tooth surface of the bevel gear (2). The two parts form a relatively closed gear shield space through bolts in the second bolt hole (4) and are fixed inside the drive axle.

5. The bevel gear shield system in the drive axle shield system capable of enhancing bearing lubrication and reducing power loss according to claim 4, characterized in that: The horizontal distance between the bevel gear side plate (3) and the back of the bevel gear (2) is 3 mm, and the inner diameter of the bevel gear side plate (3) and the outer diameter of the differential (7) differ by 3 mm.

6. The bevel gear shield system in the drive axle shield system capable of enhancing bearing lubrication and reducing power loss according to claim 4, characterized in that: The axial clearance d1 and radial clearance d2 between the bevel gear shield (5) and the tooth surface of the bevel gear (2) are both 3 mm, thereby achieving assembly with a minimum spacing and storing lubricating oil for lubricating the bevel gear (2).

7. The bevel gear shield system in the drive axle shield system capable of enhancing bearing lubrication and reducing power loss according to claim 4, characterized in that: The lower oil outlet of the gear shield (5) is 250 degrees away from the upper oil outlet, and the upper oil outlet is in a tangent relationship with the oil collecting groove in the drive axle, so that the lubricating oil after leaving the shield has the function of high-speed directional transportation.

8. The bevel gear shield system in the drive axle shield system capable of enhancing bearing lubrication and reducing power loss according to claim 3, characterized in that: The bevel gear shield (8) is a semicircular shield with an angle of 180 degrees and is assembled on the side of the bevel gear away from the bevel gear (2).

9. A bevel gear shield system in a drive axle shield system capable of enhancing bearing lubrication and reducing power loss according to claim 8, characterized in that: The diameter of the semicircular bevel gear shield (8) and the maximum end clearance of the bevel gear are 3mm, which is convenient for bevel gear assembly and storage of lubricating oil.

10. The bevel gear shield system in the drive axle shield system capable of enhancing bearing lubrication and reducing power loss according to claim 8, characterized in that: The semicircular bevel gear shield (8) is fixed to the drive axle through the third bolt hole (9), and the middle lubricating oil passage of the drive axle is located outside the bevel gear shield (8).

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