CN211340303U - Vibration eccentric structure of road roller - Google Patents
Vibration eccentric structure of road roller Download PDFInfo
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- CN211340303U CN211340303U CN201921449950.7U CN201921449950U CN211340303U CN 211340303 U CN211340303 U CN 211340303U CN 201921449950 U CN201921449950 U CN 201921449950U CN 211340303 U CN211340303 U CN 211340303U
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Abstract
The utility model discloses a vibration eccentric structure of a road roller, which comprises an excitation shaft arranged at the two ends of a transmission shaft and an excitation structure sleeved on the excitation shaft; the excitation structure comprises a fixed eccentric block and a movable eccentric block; the fixed eccentric block and the movable eccentric block are sleeved on the excitation shaft in a mutually crossed manner, the fixed eccentric block is fixedly connected with the excitation shaft, and the movable eccentric block is movably connected with the excitation shaft; the bottom of the opposite end surfaces of the fixed eccentric block and the movable eccentric block is provided with a large vibration limiting surface, and the top of the opposite end surfaces of the fixed eccentric block and the movable eccentric block is provided with a small vibration limiting surface; the load of the whole machine system is greatly reduced, and the large vibration limiting surface and the small vibration limiting surface are large contact surfaces, so that the local stress and impact force generated by the contact surfaces are greatly reduced, the characteristic of low impact is achieved, and the impact-free effect is even approached.
Description
Technical Field
The utility model relates to a road roller vibration eccentric structure belongs to road construction engineering machinery technical field.
Background
The vibratory roller is a common compaction construction device for earthwork construction and road surface construction, and the compactness of working media such as earth and rock filling and road surface paving layer mixed materials is increased by utilizing the combined action of the gravity and vibration of the roller. As a vibration source of the vibratory roller, the vibration eccentric mechanism rotates at a high speed to generate centrifugal force, so that the vibration wheel is forced to vibrate.
The traditional vibration eccentric mechanism is mainly formed by welding two fixed eccentric blocks, a movable eccentric block, a stop pin and a vibration shaft. Through the change of the rotation direction of the vibration shaft, the movable eccentric block and the fixed eccentric block generate two different phase differences under the limiting action of the stop pin, so that two kinds of static eccentricity with one larger value are generated, and the large and small amplitude switching of the vibration wheel is realized. The vibrating eccentric mechanism is simple in structure and convenient to manufacture, and is commonly applied to a vibrating road roller. However, because there is no buffer device between the movable eccentric block and the stop pin in the traditional structure, when the rotation direction is changed, the movable eccentric block can impact the stop pin at high speed under the action of inertia, so that the eccentric mechanism and the bearing can bear large impact load instantly, and the reliability of the eccentric mechanism and the bearing is influenced. The industry has therefore slowly begun to turn gaze towards non-impact vibratory eccentric mechanisms. The non-impact vibration eccentric block mechanism is generally provided with a closed cavity, and spherical steel shots are filled in the cavity to replace a movable eccentric block or inject buffer solution to buffer the movable eccentric block so as to achieve the purpose of no impact or small impact.
However, the two most common vibration eccentric mechanisms in the market have the following disadvantages:
first, when the conventional pin type vibration eccentric mechanism is adopted, the pin limits the shape structures of the fixed eccentric block and the movable eccentric block, the changed space is very small, and the pin cannot be designed according to the shape of small rotational inertia. In addition, the movable eccentric block is in line contact with the stop pin in an impact way, so that stress concentration is easily caused, and the reliability and the service life of the whole eccentric block mechanism are directly reduced.
Secondly, when the non-impact eccentric mechanism is adopted, most of the non-impact eccentric mechanisms are formed by adding a large-volume closed cavity on the original traditional eccentric mechanism to surround the movable eccentric block, the structural form is undoubtedly to increase the rotational inertia of the non-impact eccentric mechanism, larger load is brought to the whole machine system, the manufacturing cost is high, and the non-impact eccentric mechanism is also a root cause that a high-frequency vibratory roller in the current industry does not adopt the non-impact eccentric structure at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the prior art, provide a road roller vibration eccentric structure.
A road roller vibration eccentric structure comprises an excitation shaft arranged at two ends of a transmission shaft and an excitation structure sleeved on the excitation shaft; the excitation structure comprises a fixed eccentric block and a movable eccentric block;
the fixed eccentric block and the movable eccentric block are sleeved on the excitation shaft in a mutually crossed manner, the fixed eccentric block is fixedly connected with the excitation shaft, and the movable eccentric block is movably connected with the excitation shaft;
the bottom of the opposite end face of the fixed eccentric block and the movable eccentric block is provided with a large vibration limiting face, and the top of the opposite end face of the fixed eccentric block and the movable eccentric block is provided with a small vibration limiting face.
Furthermore, the fixed eccentric block is provided with a fixed eccentric block inner ring, the fixed eccentric block inner ring is provided with a key groove, and a flat key is arranged in the key groove.
Furthermore, a check ring is arranged at one end of the excitation shaft close to the fixed eccentric block.
Furthermore, the middle part of the transmission shaft is a cylinder, and spline sleeves are welded at two ends of the transmission shaft.
Further, the diameter of the outer circle of the spline sleeve is larger than that of the outer circle of the cylinder.
Furthermore, the middle of the spline housing is provided with a through hole.
Furthermore, the included angle range of the large vibration limiting surface and the small vibration limiting surface is 0-90 degrees.
Furthermore, the movable eccentric block is provided with a movable eccentric block inner ring, and the movable eccentric block inner ring is in clearance fit with the excitation shaft.
Furthermore, a step is arranged at the other end of the excitation shaft close to the movable eccentric block.
Furthermore, at least one end of the excitation shaft is provided with a spline.
Compared with the prior art, the utility model discloses the beneficial effect who reaches: the structure is simple, only one of each of the fixed eccentric block and the movable eccentric block is arranged, the fixed eccentric block and the movable eccentric block are arranged in an intersecting mode, the limit of a stop pin is avoided, and the appearance design can be designed according to the requirement of low rotational inertia. For the pin-type eccentric structures of two fixed eccentric blocks and a activity eccentric block of tradition, inertia reduces about 50%, reduce about 70% than traditional impact-free eccentric structures inertia, the transmission shaft structure is the mid portion drum, the fixed spline housing form in both ends, effectively reduce the inertia of transmission shaft, whole eccentric system possesses ultralow inertia like this, greatly reduced to whole machine system's load, including big shake with the spacing face of little shake be big contact surface, very big reduction the local stress and the impact force that the contact surface produced like this, possess the characteristic of low impact, be close to no impact effect even.
Drawings
FIG. 1 is a structural diagram of the large vibration state of the present invention;
FIG. 2 is a structural diagram of the small vibration state of the present invention;
FIG. 3 is a schematic diagram of the limiting surface of the large vibration limiter of the present invention;
FIG. 4 is a schematic diagram of the small vibration limiting surface of the present invention;
FIG. 5 is an internal schematic view of the left excitation mechanism of the present invention;
FIG. 6 is a diagram of the fixed eccentric block of the present invention;
FIG. 7 is a diagram of the movable eccentric block of the present invention;
FIG. 8 is a structural view of the transmission shaft of the present invention;
fig. 9 is a schematic view of the present invention in use inside a steel wheel.
The vibration damper comprises a fixed eccentric block 1, a movable eccentric block 2, a transmission shaft 3, a first excitation shaft 4, a second excitation shaft 5, a flat key 6, a check ring 7, a small vibration limiting surface 8, a large vibration limiting surface 9, a key groove 10, a fixed eccentric block inner ring 11, a movable eccentric block inner ring 12, a left sealing plate 13, a bearing seat 14, a vibration bearing 15, a steel wheel inner ring 16, a bearing support 17, a bearing seat II 18, a bearing seat II 19, a right sealing plate 20, a spline housing 20 and a cylinder 21.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1-9, a vibration eccentric structure of a road roller is disclosed, and as shown in fig. 5, 6 and 7, a fixed eccentric block 1 and a movable eccentric block 2 are arranged on a first excitation shaft 4 in a mutually crossing manner, and the fixed eccentric block 1 and the movable eccentric block 2 have the same shape. The lower part of the fixed eccentric block 1 is an eccentric part, a boss structure with a certain height is arranged on one side surface facing the movable eccentric block 2, and the boss plane is a large vibration limiting surface 9. The end surface of the arc-shaped body at the upper end of the fixed eccentric block 1 is a small vibration limiting surface 8. The angle range of the small vibration limiting surface 8 and the large vibration limiting surface 9 is 0-90 degrees, different angles are selected during design, and the eccentric structure can be different static eccentricity during small vibration. The inner ring 11 of the fixed eccentric block 1 is provided with a key groove 10, the fixed eccentric block 1 is fixed on the first excitation shaft 4 through a flat key 6, a check ring 7 is arranged close to the left side of the fixed eccentric block 1, and left side axial limiting is achieved. The movable eccentric block 2 and the fixed eccentric block 1 are arranged in a crossed mode, and the inner ring 12 of the movable eccentric block 2 is in clearance fit with the installation surface of the first excitation shaft 4 and can rotate flexibly. The first excitation shaft 4 is provided with a step close to the right side of the movable eccentric block 2, and plays a role in limiting the right axial direction.
As shown in fig. 1 and 2, the power of the vibration motor is input from the spline end of the second excitation shaft 5, and the second excitation shaft 5 and the first excitation shaft 4 are simultaneously rotated by the connection of the intermediate transmission shaft 3. As shown in figure 8, the transmission shaft 3 is structurally characterized in that a middle part cylinder 21 and spline sleeves 20 are welded at two ends, the outer circle diameter of the spline sleeve 20 is larger than that of the cylinder 21, the rotary inertia of the transmission shaft can be effectively reduced on the premise that enough torque resistance and reliability are guaranteed, and the spline sleeves 20 are respectively provided with a group of excitation structures through a middle through hole and at two ends.
As shown in fig. 3, during large vibration, the second excitation shaft 5 and the first excitation shaft 4 rotate counterclockwise, and the fixed eccentric block 1 is fixed on the excitation shaft, so the fixed eccentric block 1 on the second excitation shaft 5 and the fixed eccentric block 1 of the first excitation shaft 4 rotate counterclockwise together, the large vibration limiting surface 9 of the fixed eccentric block 1 and the large vibration limiting surface 9 of the movable eccentric block 2 are contacted and superposed, and the limitation on the movable eccentric block 2 is realized, the movable eccentric block 2 is forced to rotate together with the fixed eccentric block 1, at this time, the lower half parts of the fixed eccentric block 1 and the movable eccentric block 2 are tightly closed, the static eccentricity of the whole excitation system is increased, and thus the whole excitation system can generate larger excitation force to form a large vibration working state; as shown in fig. 4, during small vibration, the second excitation shaft 5 and the first excitation shaft 4 rotate clockwise, the fixed eccentric block 1 is fixed on the excitation shaft, the fixed eccentric block 1 on the second excitation shaft 5 and the fixed eccentric block 1 of the first excitation shaft 4 rotate clockwise together, the small vibration limiting surface 8 of the fixed eccentric block 1 and the small vibration limiting surface 8 of the movable eccentric block 2 are in contact coincidence, the movable eccentric block 2 is limited, the movable eccentric block 2 is forced to rotate together with the fixed eccentric block 1, and at this time, the fixed eccentric block 1 and the movable eccentric block 2 form a certain included angle, and the static eccentric distance of the whole excitation system is reduced, so that the whole excitation system can generate smaller excitation force to form a small vibration working state.
As shown in fig. 9, the whole vibration excitation system is installed inside the vibrating steel wheel, specifically, two sets of vibration excitation structures are assembled in a closed cavity in the steel wheel, the closed cavity is composed of a steel wheel inner ring 16, a left sealing plate 13 and a right sealing plate 19 on two sides, a bearing seat i 14 and a bearing seat ii 18, and two ends of the inner ring 16 are respectively welded on the left sealing plate 13 and the right sealing plate 19. Two bearing supports 17 are welded in an inner ring 16 to form radial support for the inner ring, a bearing seat I14 and a bearing seat II 18 are fixed to a left sealing plate 13 and a right sealing plate 19 through bolts, a first excitation shaft 4 is supported on the bearing seat I14 and the bearing supports 17 through two vibration bearings 15, a second excitation shaft 5 is supported on the bearing seat II 18 and the bearing supports 17 through two vibration bearings 15, the first excitation shaft 4 and the second excitation shaft 5 are connected through a transmission shaft 3, the transmission shaft 3 completes power input and transmission, a middle cylinder 21 and a spline sleeve 20 are welded at two ends, and under the condition that enough torsional strength is guaranteed, the rotational inertia of the transmission shaft 3 is effectively reduced. As described in the above section, when the counterclockwise rotating power is input, the excitation shaft drives the fixed eccentric block to rotate counterclockwise together, the large vibration limiting surface 9 of the fixed eccentric block and the large vibration limiting surface 9 of the movable eccentric block are in contact coincidence, and the limitation of the movable eccentric block is realized, the movable eccentric block is forced to rotate together with the fixed eccentric block, at this time, the lower half parts of the fixed eccentric block and the movable eccentric block are tightly closed, the static eccentricity of the whole excitation system is increased, and thus the whole excitation system can generate larger excitation force. When the clockwise rotation power is input, the excitation shaft drives the fixed eccentric block to rotate clockwise together, the small vibration limiting surface of the fixed eccentric block is in contact coincidence with the small vibration limiting surface of the movable eccentric block, the movable eccentric block is limited, the movable eccentric block is forced to rotate together with the fixed eccentric block, the fixed eccentric block and the movable eccentric block form a certain included angle, the static eccentric distance of the whole excitation system is reduced, and the whole excitation system can generate smaller excitation force.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (10)
1. A vibration eccentric structure of a road roller is characterized by comprising excitation shafts arranged at two ends of a transmission shaft and an excitation structure sleeved on the excitation shafts; the excitation structure comprises a fixed eccentric block and a movable eccentric block;
the fixed eccentric block and the movable eccentric block are sleeved on the excitation shaft in a mutually crossed manner, the fixed eccentric block is fixedly connected with the excitation shaft, and the movable eccentric block is movably connected with the excitation shaft;
the bottom of the opposite end face of the fixed eccentric block and the movable eccentric block is provided with a large vibration limiting face, and the top of the opposite end face of the fixed eccentric block and the movable eccentric block is provided with a small vibration limiting face.
2. The vibrating eccentric structure of road roller as claimed in claim 1, wherein the fixed eccentric block is provided with an inner ring of the fixed eccentric block, the inner ring of the fixed eccentric block is provided with a key groove, and a flat key is arranged in the key groove.
3. The vibrating eccentric structure of the road roller as claimed in claim 1, wherein a retaining ring is arranged at one end of the excitation shaft close to the fixed eccentric block.
4. The vibrating eccentric structure of the road roller according to claim 1, wherein the middle part of the transmission shaft is a cylinder, and spline sleeves are welded at two ends of the transmission shaft.
5. The vibrating eccentric structure of the road roller as claimed in claim 4, wherein the outer diameter of the spline housing 20 is larger than that of the cylinder 21.
6. The vibrating eccentric structure of the road roller according to claim 4, wherein the spline housing is provided with a through hole in the middle.
7. The vibration eccentric structure of the road roller according to claim 1, wherein the included angle between the large vibration limiting surface and the small vibration limiting surface ranges from 0 ° to 90 °.
8. The vibrating eccentric structure of road roller as claimed in claim 1, wherein the movable eccentric block is provided with a movable eccentric block inner ring, and the movable eccentric block inner ring is in clearance fit with the excitation shaft.
9. The vibrating eccentric structure of the road roller as claimed in claim 1, wherein a step is provided on the other end of the excitation shaft near the movable eccentric block.
10. The eccentric vibratory roller structure of claim 1, wherein at least one end of said excitation shaft is splined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921449950.7U CN211340303U (en) | 2019-09-03 | 2019-09-03 | Vibration eccentric structure of road roller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921449950.7U CN211340303U (en) | 2019-09-03 | 2019-09-03 | Vibration eccentric structure of road roller |
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| Publication Number | Publication Date |
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| CN211340303U true CN211340303U (en) | 2020-08-25 |
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| CN201921449950.7U Active CN211340303U (en) | 2019-09-03 | 2019-09-03 | Vibration eccentric structure of road roller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565481A (en) * | 2019-09-03 | 2019-12-13 | 徐工集团工程机械股份有限公司道路机械分公司 | Vibration eccentric structure of road roller |
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2019
- 2019-09-03 CN CN201921449950.7U patent/CN211340303U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565481A (en) * | 2019-09-03 | 2019-12-13 | 徐工集团工程机械股份有限公司道路机械分公司 | Vibration eccentric structure of road roller |
| CN110565481B (en) * | 2019-09-03 | 2024-05-24 | 徐工集团工程机械股份有限公司道路机械分公司 | Vibration eccentric structure of road roller |
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