CN213447976U - Eccentric excitation mechanism and road roller thereof - Google Patents
Eccentric excitation mechanism and road roller thereof Download PDFInfo
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- CN213447976U CN213447976U CN202022072981.4U CN202022072981U CN213447976U CN 213447976 U CN213447976 U CN 213447976U CN 202022072981 U CN202022072981 U CN 202022072981U CN 213447976 U CN213447976 U CN 213447976U
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Abstract
The utility model discloses an eccentric excitation mechanism and a road roller thereof, belonging to the field of road rollers and comprising an excitation shaft, wherein the excitation shaft is provided with a shaft shoulder and a groove, a retaining ring is arranged in the groove, and one end of the excitation shaft is provided with a spline housing; the device also comprises a movable eccentric block and a fixed eccentric block which are arranged on the excitation shaft; the movable eccentric block and the fixed eccentric block respectively comprise a connecting part used for being connected with an excitation shaft and a block body part fixed on the connecting part, the block part comprises a low block body, a middle block body and a high block body, the low block body, the middle block body and the high block body are sequentially connected into a whole, and the joints of the low block body, the middle block body and the high block body adopt circular arc transition; the thickness of the high blocks is greater than that of the medium blocks; wherein, the thickness of the blocks refers to the distance from the center of the connecting part of the eccentric block to the outer edge of the corresponding block. The utility model discloses can improve the reliability and the road surface compaction roughness of road roller.
Description
Technical Field
The utility model relates to an eccentric excitation mechanism and road roller thereof belongs to the road roller field.
Background
At present, the vibratory roller is widely applied to the fields of road surface construction, earthwork construction and the like, and the compaction acting force of the vibratory roller mainly comes from the centrifugal force generated by the high-speed rotation of an eccentric excitation mechanism. The eccentric excitation mechanism mainly has an impact type and a non-impact type, but has obvious defects. The traditional impact type excitation mechanism has larger impact force when starting and stopping vibration, which affects the reliability of the whole mechanism and a vibration bearing, and meanwhile, the shapes of the fixed eccentric block and the movable eccentric block are generally semicircular structures, so that larger change space is difficult to exist, and the traditional impact type excitation mechanism cannot be designed at will according to the shape of low rotational inertia; the non-impact type excitation mechanism is characterized in that a movable eccentric block is sealed in a cavity on the basis of impact, and the cavity increases the rotational inertia of the whole excitation mechanism, so that the load of the whole excitation mechanism is increased, and the manufacturing cost is also increased.
For a vibratory roller, the axial and radial dimensions of an eccentric excitation mechanism are limited in many ways in consideration of the problems of strength damage, interchange assembly and the like caused by large excitation force. Meanwhile, the eccentric excitation mechanism of the road roller has a larger base number of moment of inertia, and the moment of inertia of the eccentric excitation mechanism is an important factor influencing the compaction quality of the road surface, so that the design of the low-moment-of-inertia eccentric excitation mechanism of the vibratory road roller is a direction worthy of exploration.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides an eccentric excitation mechanism and road roller thereof improves the reliability and the road surface compaction roughness of road roller.
In order to achieve the purpose, the eccentric excitation mechanism comprises an excitation shaft, wherein a shaft shoulder and a groove are arranged on the excitation shaft, a check ring is arranged in the groove, and a spline sleeve is arranged at one end of the excitation shaft;
the device also comprises a movable eccentric block and a fixed eccentric block which are arranged on the excitation shaft;
the movable eccentric block and the fixed eccentric block respectively comprise a connecting part used for being connected with an excitation shaft and a block body part fixed on the connecting part, the block part comprises a low block body, a middle block body and a high block body, the low block body, the middle block body and the high block body are sequentially connected into a whole, and the joints of the low block body, the middle block body and the high block body adopt circular arc transition;
the thickness of the high blocks is more than that of the medium blocks and that of the low blocks.
Wherein, the thickness of the blocks refers to the distance from the center of the connecting part of the eccentric block to the outer edge of the corresponding block.
As an improvement, the fixed eccentric block is fixedly arranged on the excitation shaft through a flat key.
As an improvement, the movable eccentric block and the fixed eccentric block are both provided with a large vibration limiting surface and a small vibration limiting surface.
As an improvement, the spline sleeve is welded at the end part of the excitation shaft through a pin.
Additionally, the utility model also provides a road roller, install on the road roller eccentric excitation mechanism.
Compared with the prior art, the utility model discloses an eccentric excitation mechanism, through the relevant parameter that changes the block portion of activity eccentric block and fixed eccentric block, reduces the inertia of eccentric block, has reduced opening of whole eccentric excitation mechanism and has stopped the vibration impulsive force and open and stop the time of shaking, has improved whole vibration system's reliability and road surface compaction's roughness. Meanwhile, the impact contact area of the movable eccentric block and the fixed eccentric block is increased when the eccentric block is started and stopped, and the tearing damage risk of the eccentric block caused by stress concentration is reduced.
Drawings
Fig. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a schematic structural diagram of a vibration exciting shaft of the present invention;
FIG. 4 is a schematic perspective view of the movable eccentric block of the present invention;
FIG. 5 is a front view of the movable eccentric block of the present invention;
FIG. 6 is a schematic perspective view of the fixed eccentric block of the present invention;
FIG. 7 is a front view of the fixed eccentric block of the present invention;
in the figure: 1. the vibration excitation device comprises a vibration excitation shaft, 2 parts of a retainer ring, 3 parts of a movable eccentric block, 3-1 parts of a movable eccentric block connecting part, 3-2 parts of a low movable block, 3-3 parts of a middle movable block, 3-4 parts of a high movable block, 4 parts of a fixed eccentric block, 4-1 parts of a fixed eccentric block connecting part, 4-2 parts of a low fixed block, 4-3 parts of a middle fixed block, 4-4 parts of a high fixed block, 5 parts of a flat key, 6 parts of a pin, 7 parts of a spline housing, 8 parts of a shaft shoulder, 9 parts of a groove, 10 parts of a large vibration limiting surface, 11 parts of a small vibration limiting surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
As shown in fig. 1, 2 and 3, the eccentric excitation mechanism comprises an excitation shaft 1, wherein a shaft shoulder 8 and a groove 9 are arranged on the excitation shaft 1, a check ring 2 is arranged in the groove 9, and a spline sleeve 7 is arranged at one end of the excitation shaft 1; the eccentric excitation mechanism further comprises a movable eccentric block 3 and a fixed eccentric block 4 which are arranged on the excitation shaft 1, wherein the shaft shoulder 8 is used for preventing the movable eccentric block 3 from axially moving when the whole eccentric excitation mechanism rotates at a high speed, and the retainer ring 2 is used for preventing the fixed eccentric block 4 from axially moving after long-term use;
the movable eccentric block 3 and the fixed eccentric block 4 respectively comprise a connecting part used for being connected with the excitation shaft 1 and a block body part fixed on the connecting part, the block body part comprises a low block body, a middle block body and a high block body, the low block body, the middle block body and the high block body are sequentially connected into a whole, and the connecting parts of the low block body, the middle block body and the high block body are in arc transition;
the thickness of the high blocks is greater than that of the medium blocks;
wherein, the thickness of the blocks refers to the distance from the center of the connecting part of the eccentric block to the outer edge of the corresponding block.
As a modification of the embodiment, the fixed eccentric block 4 is fixedly mounted on the excitation shaft 1 through a flat key 5.
As a modification of the embodiment, as shown in fig. 4 and 6, the movable eccentric block 3 and the fixed eccentric block 4 are both provided with a large vibration limiting surface 10 and a small vibration limiting surface 11. The impact contact area of the movable eccentric block 3 and the fixed eccentric block 4 is increased when the eccentric blocks start and stop vibrating, so that the tearing damage risk of the eccentric blocks caused by stress concentration is reduced.
As a modification of the embodiment, as shown in fig. 3, the spline housing 7 is welded to the end of the excitation shaft 1 through a pin 6, and the spline is used for transmission.
In addition, the road roller is provided with the eccentric excitation mechanism.
Before the movable eccentric block 3 is installed, the axial sizes of the movable eccentric block 3 and a shaft shoulder 8 on the excitation shaft 1 are controlled by a tool (a 1-2mm thin plate) so as to ensure the flexible rotation of the movable eccentric block 3;
the cross sections of the block parts of the movable eccentric block 3 and the fixed eccentric block 4 are similar to the face shape of a monkey, the center of the connecting part is taken as a reference circle center, and the circle center of the arc of the low block body is superposed with the reference circle center; the center of the main circular arc of the middle block body is positioned at a horizontal included angle alpha and a distance L1/sin alpha; the center of the main arc of the high block body is positioned right below the reference center by a distance L2; specifically, as shown in fig. 4 and 5, a large vibration limiting surface 10 and a small vibration limiting surface 11 are arranged on the movable eccentric block 3 for increasing the impact contact surface when starting and stopping vibration, the movable eccentric block 3 comprises a movable eccentric block connecting part 3-1, a low movable block 3-2, a middle movable block 3-3 and a high movable block 3-4, the movable eccentric block connecting part 3-1 is movably mounted on the excitation shaft 1, the low movable block 3-2, the middle movable block 3-3 and the high movable block 3-4 are respectively mounted on the movable eccentric block connecting part 3-1, the thickness of the high movable block 3-4 (L2+ R2) is greater than the thickness of the middle movable block 3-3 (L1/sin α + R1) is greater than the thickness of the low movable block 3-2, and the assembly requirements can be met by adjusting the parameters R2 and L2 as shown in fig. 5, adjusting parameters L1, R1(R1 is less than R2, L1 is more than L2) and alpha to make up for the design purposes of meeting the excitation force loss and the low-rotational-inertia eccentric excitation mechanism caused by interchange assembly;
after the flat key 5 is pressed into the excitation shaft 1 in a press-fitting mode, the fixed eccentric block 4 is assembled in the same installation mode;
similarly, as shown in fig. 6 and 7, the fixed eccentric block 4 is provided with a large vibration-limiting surface 10 and a small vibration-limiting surface 11 for increasing the impact contact surface when starting and stopping vibration, the fixed eccentric block 4 comprises a fixed eccentric block connecting part 4-1, a low fixed block 4-2, a middle fixed block 4-3 and a high fixed block 4-4, the fixed eccentric block connecting part 4-1 is movably mounted on the excitation shaft 1, the low fixed block 4-2, the middle fixed block 4-3 and the high fixed block 4-4 are respectively mounted on the fixed eccentric block connecting part 4-1, the thickness of the high fixed block 4-4 (L2+ R2) > the thickness of the middle fixed block 4-3 (L1/sin α + R1) > the thickness of the low fixed block 4-2 can be adjusted by adjusting the parameters R2 and L2 shown in fig. 7 to meet the assembly requirements, adjusting parameters L1, R1(R1 is less than R2, L1 is more than L2) and alpha to make up for the design purposes of meeting the excitation force loss and the low-rotational-inertia eccentric excitation mechanism caused by interchange assembly;
and removing the tool (1-2mm sheet), and installing the check ring 2 in the groove 9 of the excitation shaft 1, namely completing the assembly of the whole eccentric excitation mechanism.
The utility model discloses an eccentric excitation mechanism, the block portion through changing movable eccentric block and fixed eccentric block is relevant parameter, reduces the inertia of eccentric block, has reduced opening of whole eccentric excitation mechanism and has stopped the impulsive force of shaking and open and stop the time of shaking, has improved whole vibration system's reliability and road surface compaction roughness. Meanwhile, the impact contact area of the movable eccentric block and the fixed eccentric block is increased when the eccentric block is started and stopped, and the tearing damage risk of the eccentric block caused by stress concentration is reduced.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.
Claims (5)
1. An eccentric excitation mechanism comprises an excitation shaft (1), wherein a shaft shoulder (8) and a groove (9) are arranged on the excitation shaft (1), a check ring (2) is arranged in the groove (9), and a spline sleeve (7) is arranged at one end of the excitation shaft (1);
the device is characterized by also comprising a movable eccentric block (3) and a fixed eccentric block (4) which are arranged on the excitation shaft (1);
the movable eccentric block (3) and the fixed eccentric block (4) both comprise a connecting part used for being connected with the excitation shaft (1) and a block body part fixed on the connecting part, the block body part comprises a low block body, a middle block body and a high block body, the low block body, the middle block body and the high block body are sequentially connected into a whole, and the connecting parts of the low block body, the middle block body and the high block body are in arc transition;
the thickness of the high blocks is greater than that of the medium blocks;
wherein, the thickness of the blocks refers to the distance from the center of the connecting part of the eccentric block to the outer edge of the corresponding block.
2. The eccentric excitation mechanism as claimed in claim 1, wherein the fixed eccentric mass (4) is fixedly mounted on the excitation shaft (1) by means of a flat key (5).
3. The eccentric excitation mechanism according to claim 1 or 2, wherein the movable eccentric block (3) and the fixed eccentric block (4) are provided with a large vibration limiting surface (10) and a small vibration limiting surface (11).
4. The eccentric excitation mechanism according to claim 1, characterized in that the spline housing (7) is welded to the end of the excitation shaft (1) by means of a pin (6).
5. A roller having an eccentric excitation mechanism as claimed in any one of claims 1 to 4 mounted thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022072981.4U CN213447976U (en) | 2020-09-21 | 2020-09-21 | Eccentric excitation mechanism and road roller thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022072981.4U CN213447976U (en) | 2020-09-21 | 2020-09-21 | Eccentric excitation mechanism and road roller thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213447976U true CN213447976U (en) | 2021-06-15 |
Family
ID=76327319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022072981.4U Active CN213447976U (en) | 2020-09-21 | 2020-09-21 | Eccentric excitation mechanism and road roller thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213447976U (en) |
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2020
- 2020-09-21 CN CN202022072981.4U patent/CN213447976U/en active Active
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