CN220785448U - Auxiliary supporting device of gearbox for heavy truck - Google Patents
Auxiliary supporting device of gearbox for heavy truck Download PDFInfo
- Publication number
- CN220785448U CN220785448U CN202322663345.2U CN202322663345U CN220785448U CN 220785448 U CN220785448 U CN 220785448U CN 202322663345 U CN202322663345 U CN 202322663345U CN 220785448 U CN220785448 U CN 220785448U
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- vibration isolation
- isolation unit
- frame side
- mounting hole
- gearbox
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- 238000002955 isolation Methods 0.000 claims abstract description 166
- 238000009434 installation Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 230000002238 attenuated effect Effects 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013040 rubber vulcanization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Vibration Prevention Devices (AREA)
Abstract
The utility model discloses a gearbox auxiliary supporting device for a heavy truck, which comprises: the vehicle frame side support, the cross beam and the two-stage vibration isolation structures are arranged at two ends of the cross beam; the second-stage vibration isolation structure includes: the middle bracket and the two vibration isolation units are arranged, one end of the middle bracket is connected with the cross beam through one vibration isolation unit, and the other end of the middle bracket is connected with the frame side bracket through the other vibration isolation unit; the vibration isolation unit includes: the sleeve is sleeved with an upper rubber main spring and a lower rubber main spring outside the sleeve. The arrangement mode of the secondary vibration isolation structure enables vibration of the power assembly to be effectively attenuated, the rigidity of the rubber main spring is not required to be reduced, and the gearbox shell can be effectively protected; because the arrangement modes of the two vibration isolation units are different, the displacement of the power assembly can be restrained in different directions, and the vehicle is friendly in NVH performance; structural design is more reasonable, makes gearbox auxiliary stay device all possess the adjustability in X, Y, Z three directions.
Description
Technical Field
The utility model relates to the technical field of power assembly suspension systems, in particular to an auxiliary supporting device for a gearbox of a heavy truck.
Background
The engine matched with the heavy truck is mostly a large-displacement engine, the gearbox is mostly a 12-gear or more gearbox, and the rear end of the gearbox is additionally provided with a hydraulic retarder.
The auxiliary supporting device structure of the gearbox adopted by the domestic heavy truck has various structures, but most of the structures have certain design defects, namely, in order to ensure that the auxiliary support does not bear any load effect under the static load working condition, most of the auxiliary supporting devices are not provided with adjustability in structure, so that the auxiliary support is actually of an oversubscribed structure, the main suspension system is interfered, the vibration isolation performance of the main suspension system is affected, in order to reduce the occurrence of cracking faults of the gearbox shell, part of the structures adopt rubber main springs with lower rigidity, so that the load applied to the gearbox shell is reduced, but the reduction of the rigidity increases the displacement of the power assembly and the rubber main springs, and the fatigue life of the conventional auxiliary supporting device is lower.
Disclosure of Invention
In order to solve the technical problems, the utility model provides an auxiliary supporting device for a gearbox of a heavy truck. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The utility model adopts the following technical scheme:
Provided is a gearbox auxiliary support device for a heavy truck, comprising: the vehicle frame side support, the cross beam and the two-stage vibration isolation structures are arranged at two ends of the cross beam; the secondary vibration isolation structure includes: the middle support and the two vibration isolation units are arranged in the middle, one end of the middle support is connected with the cross beam through one vibration isolation unit, and the other end of the middle support is connected with the frame side support through the other vibration isolation unit; the vibration isolation unit includes: the sleeve and the sleeve are sleeved with an upper rubber main spring and a lower rubber main spring outside the sleeve, and a rubber column is arranged on the lower rubber main spring, so that the upper rubber main spring and the lower rubber main spring are separated by a certain distance to form an installation space.
Furthermore, the two ends of the cross beam are provided with first-level vibration isolation unit mounting tables, and the first-level vibration isolation unit mounting tables are provided with first-level vibration isolation unit mounting holes; the first-level vibration isolation unit mounting table is sleeved in the mounting space, and a vibration isolation unit bolt penetrates through the sleeve and the first-level vibration isolation unit mounting hole and is locked with a vibration isolation unit nut through a gasket, so that the vibration isolation unit is connected with the cross beam.
Further, the aperture of the first-stage vibration isolation unit mounting hole is larger than the outer diameter of the rubber column platform.
Further, the bottom of the beam is provided with a beam installation boss, the beam installation boss is provided with a beam installation hole, a beam bolt penetrates through the beam installation hole and is connected with the gearbox, and the lower surface of the beam installation boss is an inclined plane, and the inclination angle is 3 degrees.
Further, the frame side bracket includes: the device comprises a backboard, a supporting board and a secondary vibration isolation unit mounting table; the secondary vibration isolation unit mounting table is provided with a secondary vibration isolation unit mounting hole; the secondary vibration isolation unit mounting table is sleeved in the mounting space, and the vibration isolation unit bolts penetrate through the sleeve and the secondary vibration isolation unit mounting holes and are locked with the vibration isolation unit nuts through washers, so that the vibration isolation units are connected with the frame side brackets.
Further, a frame side bracket mounting boss is arranged on the back plate, a frame side bracket mounting hole is formed in the frame side bracket mounting boss, and a frame side bolt penetrates through the frame side bracket mounting hole and is locked through a frame side nut, so that the frame side bracket is connected with the frame.
Further, the intermediate bracket includes: a transverse shelf and a vertical shelf arranged on the transverse shelf; the vibration isolation device comprises a vertical frame plate, a vibration isolation unit and a transverse frame plate, wherein a first bracket mounting hole used for being connected with the vibration isolation unit is formed in the vertical frame plate, a second bracket mounting hole used for being connected with the vibration isolation unit is formed in the transverse frame plate, and the first bracket mounting hole and the second bracket mounting hole are oblong holes.
Further, the vibration isolation unit bolt passes through the sleeve, the first-stage vibration isolation unit mounting hole and the second bracket mounting hole and is locked with the vibration isolation unit nut through the gasket, and the vibration isolation unit bolt passes through the sleeve, the second-stage vibration isolation unit mounting hole and the first bracket mounting hole and is locked with the vibration isolation unit nut through the gasket, so that the cross beam, the vibration isolation unit and the middle bracket are connected with the frame side bracket.
The utility model has the beneficial effects that:
1. the arrangement mode of the secondary vibration isolation structure enables vibration of the power assembly to be effectively attenuated, the rigidity of the rubber main spring is not required to be reduced, and the gearbox shell can be effectively protected;
2. the vibration isolation units are additionally provided with the hard limit design, and the displacement of the power assembly can be restrained in different directions due to different arrangement modes of the two vibration isolation units, so that the vibration isolation units are friendly to NVH performance of the whole vehicle;
3. Structural design is more reasonable, makes gearbox auxiliary stay device all possess the adjustability in X, Y, Z three directions, ensures not receive the load effect under static load operating mode and uniform velocity driving operating mode, and is more convenient moreover when the installation operation, and the commonality is higher, all has certain advantage in the aspect of cost and maintainability.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of the auxiliary support device of the gearbox of the present utility model;
FIG. 2 is a schematic view of the auxiliary support device of the gearbox of the present utility model;
FIG. 3 is a top view of the auxiliary support device of the gearbox of the present utility model;
FIG. 4 is a perspective view of a beam of the present utility model;
FIG. 5 is a schematic view of the structure of the cross beam of the present utility model;
FIG. 6 is a top view of the beam of the present utility model;
FIG. 7 is a schematic cross-sectional view of a cross-beam of the present utility model;
fig. 8 is a perspective view of the vibration isolation unit of the present utility model;
Fig. 9 is a schematic view of an exploded structure of the vibration isolation unit of the present utility model;
Fig. 10 is a schematic structural view of the vibration isolation unit of the present utility model;
FIG. 11 is a perspective view of an intermediate bracket of the present utility model;
FIG. 12 is a perspective view of a frame side bracket of the present utility model;
fig. 13 is a schematic structural view of the frame-side bracket of the present utility model.
Detailed Description
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-13, in some illustrative embodiments, the present utility model provides a heavy truck gearbox auxiliary support device comprising: the vehicle frame side bracket 4, the cross beam 1 and the two-stage vibration isolation structures arranged at two ends of the cross beam 1; the second-stage vibration isolation structure includes: the middle bracket 3 and two vibration isolation units, one end of the middle bracket 3 is connected with the cross beam 1 through one vibration isolation unit, the other end is connected with the frame side bracket 4 through the other vibration isolation unit, and the frame side bracket 4 is connected with the frame 5.
The two vibration isolation units have the same structure and specifically comprise: an upper rubber main spring 21, a sleeve 22, and a lower rubber main spring 23. Wherein, upper rubber main spring 21 and lower rubber main spring 23 cover are established in the outside of sleeve 22, and set up rubber pylon 27 on the lower rubber main spring 23, and the design of rubber pylon 27 makes upper rubber main spring 21 and lower rubber main spring 23 certain distance in order to form installation space 28 when the equipment, and installation space 28 is used for being connected with crossbeam 1 and frame side support 4. The sleeve 22 plays a role in axial limiting, and a hard limiting design is added, so that the rubber main spring can be effectively prevented from having excessive stretching displacement, and the cracking of a rubber vulcanization layer is avoided. The mounting thickness 14 of the first-stage vibration isolation unit is larger than the compressed thickness 24 of the vibration isolation unit, and the difference value of the mounting thickness and the compressed thickness is the compression amount.
The auxiliary supporting device for the gearbox adopts four vibration isolation units, and the four vibration isolation units have the same structure but different arrangement modes, so that the two vibration isolation units in the secondary vibration isolation structure are respectively marked as a primary vibration isolation unit 2 and a secondary vibration isolation unit 8 in the embodiment, and the middle bracket 3 is connected with the cross beam 1 through the primary vibration isolation unit 2 and is connected with the frame side bracket 4 through the secondary vibration isolation unit 8.
When the whole vehicle runs, the vibration and load of the power assembly are transmitted to the secondary vibration isolation structure through the cross beam 1, and the vibration from the power assembly is attenuated and the load of the gearbox is born by utilizing the elasticity and damping characteristics of the rubber material. The vibration and load attenuated by the primary vibration isolation unit 2 are transmitted to the secondary vibration isolation unit 8 through the middle support 3, so that secondary vibration isolation is realized, and the vibration transmitted to the frame by the power assembly and the vibration transmitted to the power assembly from the ground can be effectively reduced through the secondary vibration isolation structure. Due to the adoption of the secondary vibration isolation structure, the rubber rigidity in the vibration isolation unit is not required to be too small, and the reduction of the load born by the gearbox can be realized, so that the gearbox shell is protected from cracking easily.
The two ends of the beam 1 are provided with a first-level vibration isolation unit mounting table 15, and the first-level vibration isolation unit mounting table 15 is provided with a first-level vibration isolation unit mounting hole 18. The primary vibration isolation unit mounting table 15 is sleeved in the mounting space 28, namely, the primary vibration isolation unit mounting table 15 is sleeved on the rubber column table 27 of the primary vibration isolation unit 2 and is positioned in the mounting space 28 of the primary vibration isolation unit 2. The vibration isolation unit bolts 10 pass through the sleeves 22 of the primary vibration isolation units 2 and the primary vibration isolation unit mounting holes 18 and are locked with the vibration isolation unit nuts 11 by washers 9 so that the primary vibration isolation units 2 are connected with the cross beam 1.
The bottom of the beam 1 is provided with a beam mounting boss 17, the beam mounting boss 17 is provided with a beam mounting hole 19, and the beam bolt 12 passes through the beam mounting hole 19 and is connected with the gearbox 13. Since the installation angle of the power assembly is 3 °, the lower surface of the beam installation boss 17 in this embodiment is an inclined plane, and the inclination angle is 3 ° for convenience of assembly and convenience of design of other component sizes.
The beam 1 is provided with a beam lightening hole 20.
The cross beam 1 is designed into a casting structure, and two sides are of an X-direction symmetrical structure. The primary vibration isolation unit mounting thickness 14 is determined based on the thickness of the rubber abutment 27 on the lower rubber main spring 23, which is fixed if the vibration isolation unit structure is used unchanged. The mounting thickness 16 of the cross beam is determined according to the depth of the threaded hole of the gearbox and the selected standard component, namely, the depth of the selected standard component from the threaded hole after tightening is only about 2mm, and in order to improve the looseness resistance of the bolt, the thickness is as much as possible in a reasonable range.
In order to meet the adjustability of the device in the assembly process, the primary vibration isolation unit mounting holes 18 are designed to be large round holes, namely, the aperture of the primary vibration isolation unit mounting holes 18 is larger than the outer diameter of the rubber pylons 27, so that the Y-direction has adjustability.
The frame side bracket 4 includes: back plate 47, support plate 48 and secondary vibration isolation unit mount 45.
The secondary vibration isolation unit mounting table 45 is provided with a secondary vibration isolation unit mounting hole 46. The secondary vibration isolation unit mounting table 45 is sleeved in the mounting space 28, namely, the secondary vibration isolation unit mounting table 45 is sleeved on the rubber column table 27 of the secondary vibration isolation unit 8 and is positioned in the mounting space 28 of the secondary vibration isolation unit 8. The vibration isolation unit bolts 10 pass through the sleeves 22 of the secondary vibration isolation units 8 and the secondary vibration isolation unit mounting holes 46, and are locked with the vibration isolation unit nuts 11 by the washers 9 so that the secondary vibration isolation units 8 are connected with the frame-side brackets 4.
The frame side bracket 4 is designed into a casting structure, the product consistency is good, and the mounting thickness 43 of the secondary vibration isolation unit is the same as the mounting thickness 14 of the primary vibration isolation unit. The back plate 47 is provided with a frame side bracket mounting boss 44, the frame side bracket mounting boss 44 is provided with a frame side bracket mounting hole 41, and the frame side bolt 7 passes through the frame side bracket mounting hole 46 and is locked by the frame side nut 6 so that the frame side bracket 4 is connected with the frame 5. Six frame side bracket mounting holes 41 are machined according to the frame standard hole design, and the mounting surfaces, namely a frame side bracket machined surface 42 and a frame side bracket mounting boss 44 are machined.
The intermediate bracket 3 includes: a transverse shelf 37 and a vertical shelf 38 provided on the transverse shelf 37.
The vertical frame plate 38 is provided with a first bracket mounting hole 31 for connecting with the secondary vibration isolation unit 8, the horizontal frame plate 37 is provided with a second bracket mounting hole 35 for connecting with the primary vibration isolation unit 2, and the first bracket mounting hole 31 and the second bracket mounting hole 35 are oblong holes. The middle support 3 is designed into a casting structure, the product consistency is good, in order to meet the adjustability of the device in the assembly process, the mounting holes of the vibration isolation units are all designed into long round holes, namely the first support mounting holes 31 can achieve Z-direction adjustability, and the second support mounting holes 35 can achieve X-direction adjustability.
The vibration isolation unit bolts 10 pass through the sleeves 22, the primary vibration isolation unit mounting holes 18 and the second bracket mounting holes 35 of the primary vibration isolation unit 2 and are locked with the vibration isolation unit nuts 11 through the washers 9, and at the same time, the vibration isolation unit bolts 10 pass through the sleeves, the primary vibration isolation unit mounting holes 18 and the second bracket mounting holes 31 of the secondary vibration isolation unit 8 and are locked with the vibration isolation unit nuts 11 through the washers 9, so that the cross beam 1, the primary vibration isolation unit 2, the intermediate bracket 3, the secondary vibration isolation unit 8 and the frame side bracket 4 are sequentially connected.
The auxiliary supporting device for the gearbox provides a two-stage vibration isolation structure arrangement mode, so that vibration of the power assembly can be effectively attenuated, limit capacity in different directions is improved, displacement of the power assembly and the rubber main spring is controlled within a reasonable range, and accordingly the service life of the rubber main spring is not affected while load applied to the gearbox shell is reduced. Besides, the vibration isolation performance of the auxiliary supporting device is improved, and the rubber vulcanized body is not easy to generate fatigue cracking, and particularly the fault risk of cracking of the gearbox shell is reduced.
The vibration isolation unit is additionally provided with a hard limit design, and the displacement of the power assembly can be restrained in different directions due to different arrangement of the primary vibration isolation unit 2 and the secondary vibration isolation unit 8, so that the vibration isolation unit has friendliness on NVH performance of the whole vehicle.
The reasonable design of the cross beam 1, the middle bracket 3 and the frame side bracket 4 in the embodiment ensures that the device has adjustability in X, Y, Z directions, ensures that the device is not loaded under static load working conditions and uniform running working conditions, and avoids the influence of over-positioning on a main suspension system. And the installation and the operation are convenient, the universality is high, and the installation and the operation have certain advantages in the aspects of cost and maintainability. Meanwhile, the middle support 3 and the frame side support 4 are of casting structures, so that the product is effectively prevented from being out of tolerance, the assembly state of the product meets the design requirement, the strength of the support can be enhanced, and the appearance is attractive.
The mounting mode of the auxiliary supporting device of the gearbox for the heavy truck of the embodiment is as follows:
the first step: one end of the frame side bracket mounting boss 44 is connected to the frame 5, and the frame side bracket 4 is fastened to the frame standard hole by using the frame side bolt 7 and the frame side nut 6;
and a second step of: one end of a beam mounting boss 17 is connected with the gearbox 13, and a beam bolt 12 is used for fastening the beam 1 and a threaded hole of the gearbox;
And a third step of: the first-stage vibration isolation unit 2 is firstly connected with the first-stage vibration isolation unit mounting table 15, the vibration isolation unit bolts 10 and the vibration isolation unit nuts 11 are used for loosening, then the second-stage vibration isolation unit 8 is connected with the second-stage vibration isolation unit mounting table 45, the vibration isolation unit bolts 10 and the vibration isolation unit nuts 11 are used for loosening, and after the attachment of all mounting surfaces is ensured, corresponding standard components of the first-stage vibration isolation unit 2 and the second-stage vibration isolation unit 8 are sequentially tightened.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a heavy truck is with gearbox auxiliary stay device which characterized in that includes: the vehicle frame side support, the cross beam and the two-stage vibration isolation structures are arranged at two ends of the cross beam; the secondary vibration isolation structure includes: the middle support and the two vibration isolation units are arranged in the middle, one end of the middle support is connected with the cross beam through one vibration isolation unit, and the other end of the middle support is connected with the frame side support through the other vibration isolation unit; the vibration isolation unit includes: the sleeve and the sleeve are sleeved with an upper rubber main spring and a lower rubber main spring outside the sleeve, and a rubber column is arranged on the lower rubber main spring, so that the upper rubber main spring and the lower rubber main spring are separated by a certain distance to form an installation space.
2. The auxiliary supporting device for the gearbox of the heavy truck according to claim 1, wherein first-stage vibration isolation unit mounting tables are arranged at two ends of the cross beam, and first-stage vibration isolation unit mounting holes are formed in the first-stage vibration isolation unit mounting tables; the first-level vibration isolation unit mounting table is sleeved in the mounting space, and a vibration isolation unit bolt penetrates through the sleeve and the first-level vibration isolation unit mounting hole and is locked with a vibration isolation unit nut through a gasket, so that the vibration isolation unit is connected with the cross beam.
3. The auxiliary supporting device for a gearbox for a heavy truck according to claim 2, wherein the aperture of the primary vibration isolation unit mounting hole is larger than the outer diameter of the rubber column base.
4. The auxiliary supporting device for a gearbox for a heavy truck according to claim 3, wherein a beam mounting boss is arranged at the bottom end of the beam, a beam mounting hole is formed in the beam mounting boss, a beam bolt penetrates through the beam mounting hole and is connected with the gearbox, and the lower surface of the beam mounting boss is an inclined plane, and the inclination angle is 3 °.
5. The auxiliary support device for a heavy truck gear box according to claim 4, wherein the frame side bracket comprises: the device comprises a backboard, a supporting board and a secondary vibration isolation unit mounting table; the secondary vibration isolation unit mounting table is provided with a secondary vibration isolation unit mounting hole; the secondary vibration isolation unit mounting table is sleeved in the mounting space, and the vibration isolation unit bolts penetrate through the sleeve and the secondary vibration isolation unit mounting holes and are locked with the vibration isolation unit nuts through washers, so that the vibration isolation units are connected with the frame side brackets.
6. The auxiliary support device for a gearbox for a heavy truck according to claim 5, wherein a frame side bracket mounting boss is provided on the back plate, a frame side bracket mounting hole is provided on the frame side bracket mounting boss, and a frame side bolt passes through the frame side bracket mounting hole and is locked by a frame side nut so that the frame side bracket is connected with a frame.
7. The auxiliary support device for a gearbox for a heavy truck according to claim 6, wherein said intermediate bracket comprises: a transverse shelf and a vertical shelf arranged on the transverse shelf;
the vibration isolation device comprises a vertical frame plate, a vibration isolation unit and a transverse frame plate, wherein a first bracket mounting hole used for being connected with the vibration isolation unit is formed in the vertical frame plate, a second bracket mounting hole used for being connected with the vibration isolation unit is formed in the transverse frame plate, and the first bracket mounting hole and the second bracket mounting hole are oblong holes.
8. The auxiliary supporting device for a gearbox for a heavy truck according to claim 7, wherein a vibration isolation unit bolt passes through the sleeve, the primary vibration isolation unit mounting hole and the second bracket mounting hole and is locked with a vibration isolation unit nut by a washer, and a vibration isolation unit bolt passes through the sleeve, the secondary vibration isolation unit mounting hole and the first bracket mounting hole and is locked with a vibration isolation unit nut by a washer, so that the cross beam, the vibration isolation unit, the intermediate bracket are connected with the frame side bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322663345.2U CN220785448U (en) | 2023-10-07 | 2023-10-07 | Auxiliary supporting device of gearbox for heavy truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322663345.2U CN220785448U (en) | 2023-10-07 | 2023-10-07 | Auxiliary supporting device of gearbox for heavy truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220785448U true CN220785448U (en) | 2024-04-16 |
Family
ID=90633418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322663345.2U Active CN220785448U (en) | 2023-10-07 | 2023-10-07 | Auxiliary supporting device of gearbox for heavy truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220785448U (en) |
-
2023
- 2023-10-07 CN CN202322663345.2U patent/CN220785448U/en active Active
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