A drive axle noise reduction package, a drive axle noise reduction structure, and engineering machinery

Abstract

This utility model discloses a drive axle noise reduction package, a drive axle noise reduction structure, and engineering machinery. The drive axle noise reduction package is a flexible noise reduction package, comprising an inner protective layer, a sound-absorbing layer, and an outer protective layer. The inner protective layer is the inner wall of the drive axle noise reduction package, and the outer protective layer is the outer wall of the drive axle noise reduction package. The sound-absorbing layer is located between the inner and outer protective layers. The drive axle noise reduction package is cylindrical, with its axial direction extending left and right. It has openings at both ends, a cylindrical cavity inside for the drive axle to pass through, a sleeve hole on the front side wall for the input end of the drive axle to pass through, and a through-slit on the rear side wall. Several fixing holes are provided on the upper and lower edges of the slit. The drive axle noise reduction measure of this utility model is low-cost.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a drive axle noise reduction package, a drive axle noise reduction structure, and engineering machinery. Background Technology

[0002] In recent years, the electrification of loaders has become a key development direction in the industry. Compared with traditional loaders, electric loaders lack the masking effect of engine noise, resulting in prominent transmission system noise when the machine is moving (including gear meshing squealing noise and gear pair knocking noise, etc.), which seriously affects the external sound power of the machine, the noise level near the driver's ear, and the sound quality.

[0003] The electric drive assembly of a certain type of electric loader mainly consists of a drive motor, a gearbox, and a drive axle. The motor drives the gearbox, and the output of the gearbox is connected to the drive axle to drive the vehicle. Because this type of electric loader is designed for a high speed (up to 40 km / h), the noise from its travel system is very prominent during operation. Analysis revealed that the main noise source is the main transmission gear pair (a pair of spiral bevel gears) of the drive axle. Despite measures such as optimizing gear machining precision, tooth profile, tooth backlash, and increasing the axle housing thickness, the noise reduction effect was minimal, and the cost was high. Utility Model Content

[0004] The purpose of this utility model is to provide a drive axle noise reduction package, drive axle noise reduction structure, and engineering machinery to solve the noise problem of the main transmission gear pair (a pair of spiral bevel gears) of the drive axle in the prior art.

[0005] To achieve the above objectives, the present invention provides a drive axle noise reduction package, which is a flexible noise reduction package. The drive axle noise reduction package includes an inner protective layer, a sound-absorbing layer, and an outer protective layer. The inner protective layer is the inner wall of the drive axle noise reduction package, and the outer protective layer is the outer wall of the drive axle noise reduction package. The sound-absorbing layer is located between the inner and outer protective layers. The drive axle noise reduction package is cylindrical, with its axial direction extending left and right. It has openings at both ends, a cylindrical cavity through which the drive axle can pass, a sleeve hole through which the input end of the drive axle can pass on the front sidewall, and a through-slit along the left and right sides on the rear sidewall. Several fixing holes are provided on the upper and lower edges of the through-slit.

[0006] Furthermore, the sidewall of the drive axle noise reduction package is provided with several openings for bolt installation and axle housing maintenance.

[0007] Furthermore, the rear sidewall of the drive axle noise reduction package is provided with a maintenance window in the shape of a circular hole, and the left and right edges of the maintenance window are respectively connected to the gaps, and the gaps on the left and right sides are symmetrically arranged.

[0008] Furthermore, the upper edge of the inspection window is connected to a first bolt removal and installation window, which is rectangular in shape.

[0009] Furthermore, the upper and lower edges of the gap are provided with two fixing holes distributed along the left and right sides, and the two fixing holes on the upper edge correspond one-to-one with the two fixing holes on the lower edge.

[0010] Furthermore, the front lower side wall of the drive axle noise reduction package is provided with a second bolt removal and installation window, which is rectangular in shape, and the rear lower side wall of the drive axle noise reduction package is provided with a third bolt removal and installation window, which is convex in shape.

[0011] Furthermore, the sleeve hole is cylindrical in shape and protrudes outward.

[0012] Furthermore, the fixing holes are secured using bolts or ropes.

[0013] This utility model provides a drive bridge noise reduction structure, including a drive bridge and a drive bridge noise reduction package as described in any of the above technical solutions. The drive bridge noise reduction package is sleeved on the drive bridge, and the sleeve hole is sleeved on the input end of the drive bridge.

[0014] This utility model provides an engineering machinery, including an engineering machinery body, and also includes a drive axle noise reduction package or a drive axle noise reduction structure as described in any of the above technical solutions, wherein the drive axle noise reduction package or the drive axle noise reduction structure is disposed on the engineering machinery body.

[0015] In summary, the technical solution of this utility model has the following beneficial effects: The structure of this utility model is reasonable. (1) By setting the drive bridge noise reduction package as a flexible noise reduction package, the drive bridge noise reduction package includes an inner protective layer, a sound-absorbing layer and an outer protective layer. The inner protective layer is the inner wall of the drive bridge noise reduction package, the outer protective layer is the outer wall of the drive bridge noise reduction package, and the sound-absorbing layer is located between the inner protective layer and the outer protective layer; thereby realizing that the drive bridge noise reduction package is a flexible design. (2) By setting the drive axle noise reduction package to a cylindrical shape, with its axial direction extending in the left and right directions, and cylindrical openings at both ends, the drive axle noise reduction package has a cylindrical cavity through which the drive axle can pass. The front side wall of the drive axle noise reduction package has a sleeve hole through which the input end of the drive axle can pass, and the rear side wall of the drive axle noise reduction package has a slit running through it from left to right. Several fixing holes are provided on the upper and lower edges of the slit. Thus, during installation, the sleeve hole of the drive axle noise reduction package can be fitted onto the input end of the drive axle, and then the upper and lower parts of the slit can be fitted into the drive axle (i.e., the axle housing corresponding to the main transmission gear pair (a pair of spiral bevel gears) of the drive axle), and finally, constraints are applied to the fixing holes of the drive axle noise reduction package. From this analysis, it can be seen that the drive axle noise reduction measure of this utility model is low in cost, easy to implement, and has excellent noise reduction effect. Attached Figure Description

[0016] Figure 1 This is a first-view three-dimensional structural diagram of the drive axle noise reduction package of this utility model;

[0017] Figure 2 This is a two-dimensional structural diagram of the drive axle noise reduction package of this utility model from a second perspective.

[0018] Figure 3 This is a first-view three-dimensional structural schematic diagram of the drive axle noise reduction structure of this utility model;

[0019] Figure 4 This is a two-dimensional structural diagram of the drive axle noise reduction structure of this utility model from a second perspective;

[0020] Figure 5 This is a three-dimensional structural diagram of the drive axle noise reduction structure of this utility model from a third perspective;

[0021] Explanation of reference numerals in the attached drawings: drive axle noise reduction package (1), drive axle (2); cylinder opening (101), cylindrical cavity (102), sleeve hole (103), gap (104), fixing hole (105), inspection window (106), first bolt removal and installation window (107), second bolt removal and installation window (108), third bolt removal and installation window (109); input end (201). Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, but this does not constitute a limitation on the scope of protection of the present utility model.

[0023] In this utility model, for clearer description, the following explanation is provided: The observer faces the attached... Figure 1 In this observation, the observer's right front side is designated as "front," the observer's left rear side as "rear," the observer's left front side as "left," the observer's right rear side as "right," the observer's top side as "up," and the observer's bottom side as "down." It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate the orientation or positional relationship based on the accompanying drawings. These terms are used solely for the purpose of clearly describing this utility model and do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0024] See Figures 1 to 5This embodiment provides a drive axle noise reduction package. The drive axle noise reduction package 1 is a flexible noise reduction package. The drive axle noise reduction package 1 includes an inner protective layer, a sound-absorbing layer, and an outer protective layer. The inner protective layer is the inner wall of the drive axle noise reduction package 1, and the outer protective layer is the outer wall of the drive axle noise reduction package 1. The sound-absorbing layer is located between the inner and outer protective layers. The drive axle noise reduction package 1 is cylindrical, and its axial direction extends in the left and right direction. The left and right ends of the drive axle noise reduction package 1 are respectively provided with cylindrical openings 101. The interior of the drive axle noise reduction package 1 is provided with a cylindrical cavity 102 through which the drive axle 2 can pass. The front side wall of the drive axle noise reduction package 1 is provided with a sleeve hole 103 through which the input end 201 of the drive axle 2 can pass. The rear side wall of the drive axle noise reduction package 1 is provided with a slit 104 that runs through the left and right sides. The upper and lower edges of the slit 104 are respectively provided with a plurality of fixing holes 105. Function: (1) By setting the drive axle noise reduction package as a flexible noise reduction package, the drive axle noise reduction package includes an inner protective layer, a sound-absorbing layer and an outer protective layer. The inner protective layer is the inner wall of the drive axle noise reduction package, the outer protective layer is the outer wall of the drive axle noise reduction package, and the sound-absorbing layer is located between the inner protective layer and the outer protective layer; thereby realizing the flexible design of the drive axle noise reduction package. (2) By setting the drive axle noise reduction package to a cylindrical shape, with its axial direction extending in the left and right directions, and cylindrical openings at both ends, the drive axle noise reduction package has a cylindrical cavity through which the drive axle can pass. The front side wall of the drive axle noise reduction package has a sleeve hole through which the input end of the drive axle can pass, and the rear side wall of the drive axle noise reduction package has a slit running through it from left to right. Several fixing holes are provided on the upper and lower edges of the slit. Thus, during installation, the sleeve hole of the drive axle noise reduction package can be fitted onto the input end of the drive axle, and then the upper and lower parts of the slit can be fitted into the drive axle (i.e., the axle housing corresponding to the main transmission gear pair (a pair of spiral bevel gears) of the drive axle), and finally, constraints are applied to the fixing holes of the drive axle noise reduction package. From this analysis, it can be seen that the drive axle noise reduction measure of this utility model is low in cost, easy to implement, and has excellent noise reduction effect.

[0025] Specifically, the side wall of the drive axle noise reduction package 1 has several openings for bolt installation and axle housing maintenance. Function: These openings facilitate bolt installation of the drive axle and maintenance of the axle housing.

[0026] Specifically, the rear sidewall of the drive axle noise reduction package 1 is provided with a circular inspection window 106. Slits 104 are connected to the left and right edges of the inspection window 106, and the slits 104 on the left and right sides are symmetrically arranged. Function: The inspection window 106 is one of the aforementioned openings, facilitating the inspection of the drive axle housing, and the circular shape also facilitates its fit with the circular area of ​​the drive axle.

[0027] Specifically, the upper edge of the inspection window 106 is connected to a first bolt removal and installation window 107, which is rectangular in shape. Function: The first bolt removal and installation window 107 is one of the aforementioned openings, facilitating the installation of bolts on the drive axle, and its rectangular shape also facilitates mating with the rectangular area of ​​the drive axle.

[0028] Specifically, the upper and lower edges of the gap 104 are provided with two fixing holes 105 distributed along the left and right sides, with the two fixing holes 105 on the upper edge corresponding one-to-one with the two fixing holes 105 on the lower edge. Function: The pairwise cooperation of the four fixing holes 105 makes it easier to implement constraints on the fixing holes of the noise reduction package using bolts or ropes, and the upper and lower edges of the gap 104 form symmetry and neatness.

[0029] Specifically, the front lower side wall of the drive axle noise reduction package 1 is provided with a second bolt removal and installation window 108, which is rectangular in shape. The rear lower side wall of the drive axle noise reduction package 1 is provided with a third bolt removal and installation window 109, which is convex in shape. Function: The second bolt removal and installation window 108 and the third bolt removal and installation window 109 are one of the aforementioned openings, facilitating the installation of bolts on the drive axle, thereby providing different bolt installation areas on the front and rear lower sides of the drive axle.

[0030] Specifically, the sleeve 103 is a cylindrical hole that protrudes outward. Its function is to facilitate connection with the input end of the drive bridge.

[0031] Specifically, the mounting holes 105 are secured using bolts or ropes. Function: Using bolts or ropes to constrain the mounting holes of the drive axle noise reduction package is convenient and provides good fixation.

[0032] In a preferred embodiment, the inner protective layer, sound-absorbing layer, and outer protective layer are respectively made of fiberglass cloth, fiberglass mat, and fiberglass cloth. The thicknesses of the inner protective layer, sound-absorbing layer, and outer protective layer are 1mm±0.2mm, 10mm±2mm, and 1mm±0.2mm, respectively. The inner protective layer, sound-absorbing layer, and outer protective layer are connected by stitching. In practice: both the inner and outer protective layers are 1mm thick gray high-strength fiberglass cloth, and the sound-absorbing layer is 10mm thick high-strength fiberglass mat. The stitching method provides good integration, allowing for direct application onto the drive axle assembly during installation. This simplifies installation, improves reliability, enhances noise reduction (reducing near-field noise of the drive axle by 5-10dB), and reduces weight.

[0033] Another preferred embodiment: the inner protective layer, the sound-absorbing layer, and the outer protective layer are respectively non-woven fabric, PET sound-absorbing cotton, and fiberglass cloth. The thickness of both the inner and outer protective layers is 1mm ± 0.2mm, and the sound-absorbing layer contains 450 ± 1g / m². 2The inner protective layer, sound-absorbing layer, and outer protective layer are connected by stitching or Velcro. In practice, the inner and outer protective layers are made of 1mm black non-woven fabric and 1mm black fiberglass cloth, respectively, and the sound-absorbing layer is made of 450g / m² PET sound-absorbing cotton. During installation, it can be directly slipped onto the drive axle assembly. The installation is simple, but the reliability is lower than the first method. However, the noise reduction effect is better (the near-field noise of the pump can be reduced by 3-6dB).

[0034] This utility model also provides a drive axle noise reduction structure, including a drive axle 2 and a drive axle noise reduction package 1 according to any of the above-mentioned technical solutions. The drive axle noise reduction package 1 is fitted onto the drive axle 2, and the sleeve hole 103 is fitted onto the input end 201 of the drive axle 2. Function: By applying the drive axle noise reduction package 1 to the drive axle, the problems of poor noise reduction effect, high implementation difficulty, and high application cost of existing drive axle noise reduction measures based on gear and axle housing optimization are solved.

[0035] This utility model also provides an engineering machinery, including the engineering machinery body, and a drive axle noise reduction package 1 or a drive axle noise reduction structure according to any of the above-mentioned technical solutions, wherein the drive axle noise reduction package 1 or the drive axle noise reduction structure is disposed on the engineering machinery body. Function: The drive axle noise reduction package and drive axle noise reduction structure are applicable to the noise reduction of the main drive of the drive axle of engineering machinery. The engineering machinery body can be a loader, for example, forming a loader drive axle main drive noise reduction package.

[0036] The difference between this technical solution and the existing technology is that, compared with the existing technology, the drive axle noise reduction package designed in this utility model has a simpler structure, lighter weight, smaller size, simpler installation, lower cost, and better noise reduction effect.

[0037] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A drive axle noise reducing package, the drive axle noise reducing package (1) being a flexible noise reducing package, characterized in that: The drive axle noise reduction package (1) includes an inner protective layer, a sound-absorbing layer and an outer protective layer. The inner protective layer is the inner wall of the drive axle noise reduction package (1), and the outer protective layer is the outer wall of the drive axle noise reduction package (1). The sound-absorbing layer is located between the inner protective layer and the outer protective layer. The drive axle noise reduction package (1) is cylindrical. The axial direction of the drive axle noise reduction package (1) extends in the left and right directions. The left and right ends of the drive axle noise reduction package (1) are respectively provided with cylindrical openings (101). The interior of the drive axle noise reduction package (1) is provided with a cylindrical cavity (102) through which the drive axle (2) can pass. The front side wall of the drive axle noise reduction package (1) is provided with a sleeve hole (103) through which the input end (201) of the drive axle (2) can pass. The rear side wall of the drive axle noise reduction package (1) is provided with a gap (104) that runs through the left and right sides. The upper and lower edges of the gap (104) are respectively provided with a number of fixing holes (105).

2. The drive axle noise-reducing wrap of claim 1, wherein: The drive axle noise reduction package (1) has several openings on its side wall for bolt installation and axle housing maintenance.

3. The drive axle noise-reducing wrap of claim 2, wherein: The rear side wall of the drive axle noise reduction package (1) is provided with a maintenance window (106) in the shape of a circular hole. The left and right edges of the maintenance window (106) are respectively connected to the gap (104), and the gap (104) on the left and right sides are symmetrically arranged.

4. The drive axle noise-reducing wrap of claim 3, wherein: The upper edge of the inspection window (106) is connected to a first bolt removal and installation window (107), which is rectangular in shape.

5. The drive axle noise-reducing wrap of claim 3, wherein: The upper and lower edges of the gap (104) are provided with two fixing holes (105) distributed along the left and right sides, and the two fixing holes (105) on the upper edge correspond one-to-one with the two fixing holes (105) on the lower edge.

6. The drive axle noise-reducing wrap of claim 2, wherein: The front lower side wall of the drive axle noise reduction package (1) is provided with a second bolt removal and installation window (108), which is rectangular in shape. The rear lower side wall of the drive axle noise reduction package (1) is provided with a third bolt removal and installation window (109), which is convex in shape.

7. The drive axle noise-reducing wrap of any one of claims 1 to 6, wherein: The sleeve hole (103) is cylindrical and protrudes outward.

8. The drive axle noise-reducing wrap of any one of claims 1 to 6, wherein: The fixing hole (105) is secured using bolts or ropes.

9. A drive axle noise reduction structure comprising a drive axle (2), characterized in that: It also includes the drive bridge noise reduction package (1) according to any one of claims 1 to 8, the drive bridge noise reduction package (1) being fitted on the drive bridge (2), and the sleeve hole (103) being fitted on the input end (201) of the drive bridge (2).

10. A working machine comprising a working machine body, characterised in that: It also includes the drive axle noise reduction package (1) as described in any one of claims 1 to 8, or the drive axle noise reduction structure as described in claim 9, wherein the drive axle noise reduction package (1) or the drive axle noise reduction structure is disposed on the engineering machinery body.

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