Axle housing vibration absorber

Abstract

The utility model discloses an axle housing vibration absorber which comprises a vibration absorber guide cavity shell, a vibration absorption device, a spiral compression spring and a spring base arranged on a heavy truck axle housing, and the two ends of the spiral compression spring are connected with the spring base and the vibration absorption device respectively. The vibration absorption device comprises a vibration absorber sealing cover, a vibration absorber cavity shell and a sound insulation sleeve, and metal balls are loaded in the inner space of the vibration absorber cavity shell. Axle housing vibration is transmitted to the spiral compression spring through the spring base, metal balls in the vibration absorption device are finally caused to collide, meanwhile, noise generated when the metal balls collide with one another is absorbed through the sound insulation sleeve, vibration energy of the axle housing is consumed through mutual collision of the spiral compression spring and the metal balls, and therefore the influence of axle housing vibration on an automobile body is reduced; the rear axle assembly has the advantages of being compact in structure, small in occupied space and high in universality, a rear axle structure does not need to be modified, only a mounting position needs to be reserved for the rear axle structure, and certain development cost can be reduced on the premise that the damping effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration reduction and noise reduction of a heavy truck drive axle housing, in particular to a vibration absorber for the axle housing. Background Art

[0002] The drive axle is the last link in the automobile transmission system and is also an important source of vibration and noise of the entire vehicle. Especially for the currently popular electric vehicles, the vibration and noise of the drive axle are more obvious.

[0003] The main source of the vibration and noise of the drive axle is the meshing impact force of the rear axle main reducer gear, which is transmitted to the axle housing through the bearing, causing the axle housing to resonate and radiate noise outward. At present, the main way to reduce the vibration and noise of the rear axle is to optimize the gears. However, due to the limitation of the gear lifting space, it is impossible to reduce the vibration and noise of the rear axle simply by optimizing the gears. In addition, the current drive axle vibration reduction device has a complex structure and occupies a large space. It is necessary to redesign the rear axle components according to different vibration reduction requirements, which will undoubtedly increase the development cost. Summary of the invention

[0004] To solve the above technical problems, the utility model provides a bridge housing vibration absorber. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0005] The utility model adopts the following technical solutions:

[0006] A bridge housing vibration absorber is provided, comprising: a vibration absorbing device, a helical compression spring and a spring base arranged on the bridge housing of a heavy truck, wherein the two ends of the helical compression spring are respectively connected to the spring base and the vibration absorbing device; the vibration absorbing device comprises: a vibration absorber cover, a vibration absorber cavity shell and a sound insulation sleeve, the vibration absorber cavity shell is a cylindrical tube structure with a hollow interior and an open bottom, the vibration absorber cover is arranged at the bottom opening of the vibration absorber cavity shell and is connected to the helical compression spring, the sound insulation sleeve is coated on the outer surface of the vibration absorber cavity shell, and the internal space of the vibration absorber cavity shell is loaded with metal balls.

[0007] Furthermore, the spring base includes: a mounting base and a guide column tube arranged in the middle position of the upper surface of the mounting base; the bottom end of the helical compression spring is connected to the inner bottom wall of the guide column tube, and the top end of the helical compression spring extends from the top opening of the guide column tube and is connected to the bottom of the vibration absorber cover.

[0008] Furthermore, the mounting base plate is provided with a plurality of first through holes which are used for being bolted to the heavy truck axle housing and are evenly surrounded by the guide column.

[0009] Furthermore, the bridge housing vibration absorber also includes: a vibration absorber guide cavity shell arranged on the upper surface of the spring base, and the vibration absorber guide cavity shell and the mounting substrate are surrounded by a guide cavity; the guide column, the helical compression spring and the vibration absorbing device are all located in the guide cavity.

[0010] Furthermore, there is a certain distance between the outer wall of the vibration absorber cavity shell and the inner wall of the vibration absorber guide cavity shell to form a gap space for accommodating the sound insulation sleeve.

[0011] Furthermore, the bottom end of the vibration absorber guide cavity shell extends outward to form an outer edge platform that fits the upper surface of the mounting substrate, and the outer edge platform is provided with a plurality of second through holes that are used to be bolted to the spring base and are evenly surrounded by the vibration absorber guide cavity shell.

[0012] Furthermore, the bottom end of the vibration absorber cavity shell extends inward to form an inner edge platform that fits with the upper surface of the vibration absorber cover, and the inner edge platform is provided with a plurality of threaded holes for connecting with the vibration absorber cover; the vibration absorber cover is provided with a third through hole at a position corresponding to the threaded hole.

[0013] The beneficial effects brought about by the utility model are as follows: the vibration of the bridge housing is transmitted to the helical compression spring through the spring base, and finally causes the metal ball in the vibration absorbing device fixed above the helical compression spring to collide, and at the same time the noise generated by the metal balls colliding with each other is absorbed by the sound insulation sleeve, and the mutual collision of the helical compression spring and the metal ball is utilized to consume the vibration energy of the bridge housing, thereby reducing the influence of the vibration of the bridge housing on the vehicle body. The utility model has the characteristics of compact structure, small space occupation and strong versatility, and there is no need to modify the rear axle structure, and only a reserved installation position is required for it, which can reduce a certain development cost under the premise of ensuring the vibration reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of a bridge housing vibration absorber of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the spring base of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the guide cavity shell of the vibration absorber of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the sound insulation sleeve of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the cavity shell of the vibration absorber of the utility model;

[0020] Figure 6 It is a structural schematic diagram of a vibration absorber cover of the utility model. DETAILED DESCRIPTION

[0021] The following is a detailed description of the embodiments of the utility model in conjunction with the accompanying drawings. It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-6 As shown, in some illustrative embodiments, a bridge housing vibration absorber is provided, comprising: a spring base 1, a helical compression spring 2, a vibration absorber guide cavity shell 3 and a vibration absorbing device 4.

[0023] The axle housing vibration absorber of this embodiment is used to reduce vibration and noise of the axle housing caused by the rear axle gear frequency excitation. By adjusting the stiffness of the helical compression spring 2 and the number and volume of the metal balls 404 and other parameters, the vibration absorber can be used for vibration and noise reduction of different axle housings.

[0024] The spring base 1 is arranged on the heavy truck axle housing, preferably, arranged at the place where the heavy truck axle housing vibrates most severely, mainly playing the role of supporting the overall structure of the vibration absorber and guiding and limiting the helical compression spring 2. The two ends of the helical compression spring 2 are respectively connected to the spring base 1 and the vibration absorber 4.

[0025] The vibration absorbing device 4 includes: a vibration absorber cavity shell 401 , a sound insulation sleeve 402 , a vibration absorber cover 403 and a plurality of metal balls 404 .

[0026] The vibration absorber cavity shell 401 is a cylindrical tube structure with a hollow interior and an open bottom. The vibration absorber cover 403 is arranged at the bottom opening of the vibration absorber cavity shell 401, thereby closing the internal space of the vibration absorber cavity shell 401. The metal balls 404 are loaded in the closed space formed, and the number and volume of the metal balls 404 are determined according to the vibration frequency of the bridge housing and the stiffness of the helical compression spring 2.

[0027] The vibration energy generated by the bridge housing is transmitted to the helical compression spring 2 through the spring base 1, and finally causes the metal balls 404 inside the vibration absorber cavity shell 401 to collide. When the metal balls 404 collide with each other, a large amount of the vibration energy of the bridge housing will be consumed, thereby reducing the impact of the bridge housing vibration on the vehicle body. In addition, the compressed helical compression spring 2 and the vibration absorber 4 form a vibration system, which increases the absorption of vibration energy by the vibration absorber 4. By setting the natural frequency of the vibration system, the vibration displacement of the bridge housing can be amplified, which is beneficial to the movement of the metal balls 404. The sound insulation sleeve 402 is coated on the outer surface of the vibration absorber cavity shell 401 to absorb the noise generated when the metal balls 404 collide with each other in the vibration absorber cavity shell 401.

[0028] The spring base 1 includes a mounting base plate 101 and a guide column 102 .

[0029] The guide column 102 is disposed at the middle of the upper surface of the mounting substrate 101, and is an integrally formed structure with the mounting substrate 101, and is mainly used for guiding and limiting the helical compression spring 2. The bottom end of the helical compression spring 2 is connected to the inner bottom wall of the guide column 102, and the top end of the helical compression spring 2 extends from the top opening of the guide column 102 and is connected to the bottom of the vibration absorber cover 403.

[0030] A plurality of first through holes 1011 are formed on the mounting base plate 101 . The first through holes 1011 are evenly formed around the guide column 102 and are used for being fixedly connected with the heavy truck axle housing by bolts.

[0031] The vibration absorber guide cavity shell 3 is arranged on the upper surface of the spring base 1, specifically the upper surface of the mounting substrate 101, and the guide column 102 is buckled inside it. The vibration absorber guide cavity shell 3 and the mounting substrate 101 are surrounded to form a guide cavity 301; the guide column 102, the helical compression spring 2 and the vibration absorbing device 4 are all located in the guide cavity 301, and the guide cavity 301 is used to constrain the movement direction of the vibration absorber cavity shell 401.

[0032] There is a certain distance between the outer wall of the vibration absorber cavity shell 401 and the inner wall of the vibration absorber guide cavity shell 3 to form a gap space for accommodating the sound insulation sleeve 402 to ensure movement stability.

[0033] The bottom end of the vibration absorber guide cavity shell 3 extends outward to form an outer edge platform 302 that fits with the upper surface of the mounting substrate 101. Here, the outer side refers to the side where the external space of the vibration absorber guide cavity shell 3 is located, and the lower surface of the outer edge platform 302 fits with the upper surface of the mounting substrate 101. A plurality of second through holes 3021 are formed on the outer edge platform 302, and the second through holes 3021 are evenly formed around the vibration absorber guide cavity shell 3, and are used to be connected with the spring base 1 by bolts.

[0034] The bottom end of the vibration absorber cavity shell 401 extends inward to form an inner platform 4011 that fits with the upper surface of the vibration absorber cover 403. The inner platform 4011 is provided with a plurality of threaded holes 4012 for connecting with the vibration absorber cover 403. The vibration absorber cover 403 is provided with third through holes 4031 at positions corresponding to the threaded holes 4012. Bolts passing through the third through holes 4031 can fix the vibration absorber cover 403 to the threaded holes 4012 at the lower end of the vibration absorber cavity shell 401, thereby sealing the metal ball 404 in the vibration absorber cavity shell 401.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A bridge housing vibration absorber, characterized in that: include: A vibration absorbing device, a helical compression spring and a spring base arranged on a heavy truck axle housing, wherein two ends of the helical compression spring are respectively connected to the spring base and the vibration absorbing device; The vibration absorbing device includes: a vibration absorber cover, a vibration absorber cavity shell and a sound insulation sleeve. The vibration absorber cavity shell is a cylindrical tube structure with a hollow interior and an open bottom. The vibration absorber cover is arranged at the bottom opening of the vibration absorber cavity shell and is connected to the spiral compression spring. The sound insulation sleeve covers the outer surface of the vibration absorber cavity shell. The internal space of the vibration absorber cavity shell is loaded with metal balls.

2. The axle housing vibration absorber according to claim 1, characterized in that: The spring base includes: a mounting base and a guide column tube arranged in the middle of the upper surface of the mounting base; the bottom end of the helical compression spring is connected to the inner bottom wall of the guide column tube, and the top end of the helical compression spring extends from the top opening of the guide column tube and is connected to the bottom of the vibration absorber cover.

3. The axle housing vibration absorber according to claim 2, characterized in that: The installation base plate is provided with a plurality of first through holes which are used for being bolted to the heavy truck axle housing and are evenly surrounded by the guide column.

4. The axle housing vibration absorber according to claim 3, characterized in that: Also includes: A vibration absorber guide cavity shell is arranged on the upper surface of the spring base, and the vibration absorber guide cavity shell and the mounting substrate are surrounded to form a guide cavity; The guide column, the helical compression spring and the vibration absorbing device are all located in the guide cavity.

5. The axle housing vibration absorber according to claim 4, characterized in that: There is a certain distance between the outer side wall of the vibration absorber cavity shell and the inner side wall of the vibration absorber guide cavity shell to form a gap space for accommodating the sound insulation sleeve.

6. The axle housing vibration absorber according to claim 5, characterized in that: The bottom end of the vibration absorber guide cavity shell extends outward to form an outer edge platform that fits the upper surface of the mounting substrate. The outer edge platform is provided with a plurality of second through holes that are used to be bolted to the spring base and are evenly surrounded by the vibration absorber guide cavity shell.

7. The axle housing vibration absorber according to claim 6, characterized in that: The bottom end of the vibration absorber cavity shell extends inward to form an inner edge platform that fits with the upper surface of the vibration absorber cover, and the inner edge platform is provided with a plurality of threaded holes for connecting with the vibration absorber cover; the vibration absorber cover is provided with a third through hole at a position corresponding to the threaded hole.

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