WO2013185450A1 - 一种偏心块总成和振动式压路机 - Google Patents

一种偏心块总成和振动式压路机 Download PDF

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Publication number
WO2013185450A1
WO2013185450A1 PCT/CN2012/086033 CN2012086033W WO2013185450A1 WO 2013185450 A1 WO2013185450 A1 WO 2013185450A1 CN 2012086033 W CN2012086033 W CN 2012086033W WO 2013185450 A1 WO2013185450 A1 WO 2013185450A1
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Prior art keywords
eccentric block
limit
limiting
fixed
rotating shaft
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PCT/CN2012/086033
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English (en)
French (fr)
Inventor
王世旺
陈江波
喻衍
Original Assignee
湖南三一智能控制设备有限公司
三一重工股份有限公司
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Application filed by 湖南三一智能控制设备有限公司, 三一重工股份有限公司 filed Critical 湖南三一智能控制设备有限公司
Publication of WO2013185450A1 publication Critical patent/WO2013185450A1/zh

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E01C19/286Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll

Definitions

  • the invention relates to a eccentric block assembly and a vibratory roller which is submitted to the Chinese Patent Office on June 12, 2012, the application number is 201210191906.7, and the invention name is "an eccentric block assembly and a vibratory roller" Priority is hereby incorporated by reference in its entirety.
  • the present invention relates to the field of mechanical technology, and more particularly to an eccentric block assembly and a vibratory roller. Background technique
  • vibratory rollers are the key equipment for road construction.
  • the vibration wheel of the vibratory roller is provided with an excitation device; the excitation device rotates by driving the eccentric block assembly to generate vibration with a certain amplitude and frequency, so that the steel wheel generates a certain exciting force on the ground for the road surface. Compaction work.
  • At least two eccentricities are generally provided in the eccentric block assembly to enable the excitation device to generate both large and small amplitude vibrations.
  • Existing excitation devices that can achieve multi-level adjustment of amplitude generally include a multi-axis multi-eccentric block structure, and the amplitude of the generated vibration is adjusted by an additional driving device.
  • An object of the present invention is to provide an eccentric block assembly for the structure of an excitation device for a cylindrical vibratory roller.
  • a vibratory roller including the eccentric mass assembly is also provided.
  • An eccentric block assembly comprising an active eccentric block, a fixed eccentric block and a rotating shaft, wherein the rotating shaft passes through the axial hole of the movable eccentric block and the fixed eccentric block, is fixed with the fixed eccentric block, and is slidingly matched with the shaft hole of the movable eccentric block, An outer casing fixed to the rotating shaft is disposed outside the movable eccentric block, wherein
  • a plurality of limiting structures are arranged on the side of the movable eccentric block, and the positions of the limiting structures are arranged in an arc, and the distance to the axis of the rotating shaft is the same;
  • a limiting device is fixed on the inner side wall of the outer casing, and when the limiting device is in the closed state, cooperates with the limiting structure to limit the relative displacement of the movable eccentric block and the outer casing.
  • the side surface of the movable eccentric block is provided with an arc groove, and the arc center of the arc groove is on the axis of the rotation shaft, and the depth of the arc groove gradually becomes deeper from one end to the other end;
  • a limit spring is disposed on the inner side wall of the outer casing, and one end of the limit spring is fixed to the inner side wall, and the fixed position of the limit spring corresponds to the arc groove, and the other end of the limit spring is disposed in the arc groove.
  • the limit spring is provided with a slider at an end in the arcuate groove.
  • the inner side wall of the outer casing is provided with a spring guiding device for controlling the telescopic direction of the limiting spring to be perpendicular to the inner side wall.
  • the spring guiding device comprises a spring fixing cylinder, and the limiting spring is fixed to the bottom of the spring fixing cylinder.
  • the limiting structure is specifically a limiting pin hole
  • the limiting device comprises a limiting pin; when the limiting pin is in a closed state, the limiting pin is inserted into the limiting pin hole.
  • a sliding groove is disposed between the adjacent limiting pin holes, and the sliding groove is inclined toward the one-side limiting pin hole for sliding the limiting pin into the limiting pin hole.
  • the limit pin is specifically an electromagnetic limit pin, and in the power off state, the electromagnetic limit pin
  • the utility model is in a closed state under the action of the inner spring thereof, and in the energized state, the electromagnetic limit pin is pulled out from the limiting pin hole under the action of the electromagnetic force;
  • One end of the rotating shaft is provided with a brush device, and is provided with a circuit hole for providing a circuit between the brush device and the electromagnetic limit pin.
  • a stopper is disposed in the outer casing for respectively blocking the movable eccentric block by blocking the shoulder on the different sides of the movable eccentric block when the movable eccentric block is rotated to the same or opposite direction as the direction of the fixed eccentric block.
  • a vibratory roller includes an eccentric mass assembly as described above.
  • a plurality of limiting structures (such as limit pin holes) are disposed on the side of the movable eccentric block, and the positions of the plurality of limiting structures are arranged in an arc, and The distance from the axis of the shaft is the same;
  • a limit device (such as a limit pin) is fixed on the inner side wall of the outer casing, and when the limit device is in the closed state, cooperates with the limit structure to limit the relative movement of the movable eccentric block and the outer casing Displacement; thus, the multi-stage adjustment of the amplitude can be realized by the cooperation of the limit pin and the different limit pin holes, and the structure of the vibrating device of the vibratory roller can be compressed at the same time, and the amplitude can be stably controlled to prevent the amplitude from shifting. .
  • the limiting device and the plurality of limiting structures are selectively corresponding and matched, Multiple levels of adjustment of the vibration amplitude can be achieved.
  • the amplitude corresponding to the rotational speed can be automatically selected by adjusting the rotational speed of the eccentric block assembly according to different pressures of the limit springs at different positions in the arcuate groove.
  • FIG. 1 is a schematic structural diagram of an eccentric block assembly according to an embodiment of the present invention.
  • FIG. 2 is a second schematic structural diagram of an eccentric block assembly according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an active eccentric block in an eccentric block assembly according to an embodiment of the present invention
  • Figure 3-1 is an enlarged structural view of a portion II of Figure 3;
  • FIG. 4 is a schematic structural view of a movable eccentric block in an eccentric block assembly according to an embodiment of the present invention
  • FIG. 5 is a cross-sectional view showing a structure of an eccentric block assembly according to an embodiment of the present invention
  • FIG. 6 is a schematic structural view of an eccentric block assembly according to another embodiment of the present invention.
  • FIG. 7 is a schematic structural view of an eccentric block assembly according to still another embodiment of the present invention.
  • Embodiments of the present invention provide an eccentric block assembly.
  • the eccentric block assembly includes a movable eccentric block 1, a fixed eccentric block 2 and a rotating shaft 3; the rotating shaft 3 passes through the movable eccentric block 1 and the shaft hole of the fixed eccentric block 2; and, the rotating shaft 3 and Fixed eccentric block 2 phase fixed; shaft 3 and live
  • the shaft hole of the movable eccentric block 1 is slidably fitted to enable the movable eccentric block 1 to rotate about the axis of the rotating shaft 3 with respect to the rotating shaft 3; the movable eccentric block 1 is externally provided with a casing 4 fixed to the rotating shaft 3.
  • a plurality of limiting structures are disposed on the side surface of the movable eccentric block 1, and the plurality of limiting structures are arranged in an arc shape, and the distance to the axis of the rotating shaft 3 is the same.
  • a limiting device is fixed on the inner side wall of the outer casing 4; when the limiting device is in the closed state, cooperate with the limiting structure to limit the relative displacement between the movable eccentric block 1 and the outer casing 4. 1 is the same state as the movable eccentric block 1 and the fixed eccentric block 2, and FIG.
  • the opposite direction of the movable eccentric block 1 and the fixed eccentric block 2 (the first connection between the center of the axial hole of the movable eccentric block 1 and its center of gravity is set) a line connecting the center of the shaft hole of the fixed eccentric block 2 with the center of gravity thereof; the opposite direction is: opposite to the axis of the rotating shaft 3, the direction of the first line is opposite to the direction of the second line) status.
  • the limiting structure and the limiting device can be the limiting pin hole 5 and the limiting pin 6 respectively; the limiting pin 6 can be inserted into the limiting pin hole 5; that is, the limiting pin 6 can slidably cooperate with the housing 4 And can extend or retract the inner side wall of the casing 4; when the limit pin 6 is extended, it is in a closed state, and can be inserted into the limiting pin hole 5 to limit the relative displacement between the movable eccentric block 1 and the outer casing 4. When the limit pin 6 is retracted, it is in an open state, so that the movable eccentric block 1 can be rotated relative to the outer casing 4.
  • the fixed eccentric block 2 is fixed to the rotating shaft 3, and the movable eccentric block 1 is rotatable relative to the fixed eccentric block 2; thus, the movable eccentric block 1 and the fixed eccentric block 2 may have different angles (the angle is the first connection mentioned above) When the angle between the line and the second line is), the eccentric block assembly is further provided with different positions of the center of gravity; thus, the eccentric block assembly can generate vibrations of different amplitudes during the rotation.
  • the distance between the limiting pin 6 and the axis of the rotating shaft 3 is the same as the distance from each limiting pin hole 5 to the axis of the rotating shaft 3; the limiting pin 6 can cooperate with the limiting pin hole 5; the limiting pin 6 is inserted into the limit In the pin hole 5, the limiting mechanism is in a closed state; the limiting pin 6 is pulled out from the limiting pin hole 5, and the limiting mechanism is in an open state.
  • the limit pin 6 is in the closed state to ensure that the roller of the roller has a stable amplitude; when the amplitude of the vibration needs to be adjusted, the limit pin 6 can be made to play.
  • the open state in turn, the relative angle between the movable eccentric block 1 and the fixed eccentric block 2 can be adjusted, so that the eccentric block assembly has different position changes in the center of gravity.
  • the multi-stage adjustment of the vibration amplitude can be realized, and when the stopper mechanism is in the closed state, the movable eccentric block 1 and the fixed eccentric block 2 are relatively fixed, and the amplitude of the vibration can be stably controlled to prevent the amplitude shift.
  • the sliding groove 11 is disposed between the adjacent limiting pin holes 5; that is, on the side of the movable eccentric block 1, the opening of the adjacent limiting pin hole 5 is formed.
  • the sliding groove 11; and, the sliding groove 11 can be inclined to the one side of the limiting pin hole 5 (that is, the sliding groove 11 has a certain slope) for allowing the limiting pin 6 to slide into the one easily
  • the side is limited to the pin hole 5.
  • each of the sliding grooves 11 may be the same, that is, both are inclined in the clockwise direction toward the inside of the movable eccentric block 1, or both are inclined in the counterclockwise direction toward the inside of the movable eccentric block 1.
  • the above-mentioned limit pin 6 may be an electromagnetic limit pin; in the power-off state, the electromagnetic limit pin is in a closed state under the action of the internal spring; in the energized state, the electromagnetic limit pin is in the electromagnetic force Pull out from the limit pin hole 5 under the action.
  • the electromagnetic limit pin is provided with a spring; thus, in the power-off state, the limit pin 6 is kept closed by the action of the spring force, that is, inserted into the limit pin hole 5.
  • the electromagnetic limit pin is energized, the electromagnetic force pulls the limit pin 6 out of the limit pin hole 5 against the spring force.
  • the limit pin 6 can also adopt other types of limit pins.
  • one end of the rotating shaft 3 is provided with a brush device 12 and is provided with a circuit hole 13; the circuit hole 13 is for providing a circuit between the brush device 12 and the electromagnetic limit pin.
  • the brush device 12 can electrically connect the fixed circuit provided in the roller of the roller to the rotating circuit in the rotating shaft 3 without affecting the rotation of the rotating shaft 3.
  • the circuit hole 13 may include an axial portion and a radial portion; a radial portion of the circuit hole 13 passes through the rotating shaft 3 and the fixed eccentric block 2, and the circuit is from the rotating shaft 3 One end begins to pass through the axial portion and then through the radial portion and is ultimately connected to the electromagnetic limit pin of the outer casing 4.
  • the side surface of the movable eccentric block 1 may be provided with an arcuate groove 8; the arc center of the arcuate groove 8 is on the axis of the rotating shaft 3, and the depth of the curved groove 8 is from one end to the other One end gradually becomes deeper (visible, the bottom of the arcuate groove 8 is a spiral bevel); a finite position spring 7 is disposed on the inner side wall of the outer casing 4, and the end of the limiting spring 7 is fixed to the inner side wall of the outer casing 4; The fixed position of 7 corresponds to the arcuate groove 8; the other end of the limit spring 7 projects into the arcuate groove 8, and the limit spring 7 has a corresponding pressure on the bottom slope of the arcuate groove 8; thus, in the free state The tangential component of the pressure of the limit spring 7 against the bottom slope of the arcuate groove 8 can drive the movable eccentric block 1 to rotate.
  • the end of the limiting spring 7 in the arcuate groove 8 may be provided
  • the limiting structure and the curved groove 8 are respectively disposed on opposite sides of the movable eccentric block 1. In this way, it is possible to prevent the components from interfering with each other and to facilitate the setting of the position of the components.
  • the end of the limiting spring 7 is fixed to the inner side wall of the outer casing 4, the fixing position corresponds to the arcuate groove 8, and the other end of the limiting spring 7 is disposed in the arcuate groove 8; the limiting spring 7 can be combined with the outer casing
  • the inner side wall of 4 is perpendicular, and the distance from the fixed position to the axis of the rotating shaft 3 may be the same as the radius of the curved groove 8.
  • the position of the limit spring 7 is preferably set to the deeper end of the curved groove 8 in this state.
  • the eccentric block assembly can be rotated counterclockwise.
  • the limit spring 7 will slide along the arcuate groove 8, and the limit spring 7 is gradually compressed, so that the pressure of the corresponding limit spring 7 against the bottom slope of the arcuate groove 8 gradually increases with the compression of the limit spring 7.
  • the tangential component of this pressure will gradually increase with the compression of the limit spring 7, and drive the movable eccentric block 1 to start rotating.
  • the movable eccentric block 1 When the tangential component of the centrifugal force and the tangential component of the spring pressure are balanced with each other, the movable eccentric block 1 enters with the rotating shaft 3 Rotate at a constant speed. Because the centrifugal force of the movable eccentric block 1 is different at different rotational speeds, the spring pressure that is balanced with it will be different. Therefore, when the movable eccentric block 1 reaches a stable hook speed state, each specific speed corresponds to a specific spring pressure, that is, a specific position of the corresponding limit spring 7 in the arcuate groove 8. Therefore, the different rotational speeds of the eccentric mass assembly correspond to different angles between the active eccentric mass 1 and the fixed eccentric mass 2. After determining the correspondence, the amplitude of the vibration can be set by adjusting the rotational speed. And after the speed is stabilized, the limit pin 6 is closed to lock the current amplitude.
  • spring guides may be provided on the inner side wall of the outer casing 4 for maintaining the vertical direction between the telescopic direction of the limit spring 7 and the inner side wall of the outer casing 4.
  • the spring guide may be a spring retaining cylinder 10, and a limit spring 7 is fixed to the bottom of the spring retaining cylinder 10; the spring retaining cylinder 10 prevents the spring from tilting.
  • a stopper 14 may be disposed in the outer casing 4; the stopper 14 is configured to block the shoulder 15 on the different side of the movable eccentric block 1 when the movable eccentric block 1 is rotated to the same or opposite direction as the fixed eccentric block 2; , Limit the active eccentric block 1.
  • the limit pin 6 is in an open state, and the movable eccentric block 1 and the fixed eccentric block 2 naturally sag, and when the movable eccentric block 1 and the fixed eccentric block 2 are in the same direction, the movable eccentric block 1 can be made on both sides of the active eccentric block 1
  • the shoulder 15 is in a horizontal state. It is preferable to arrange the stopper 14 above, in this state, above the shoulder 15 of the shallower end of the arcuate groove 8, and to be in contact with the shoulder 15.
  • the block 14 can block the shoulder 15 on the side of the movable eccentric block 1,
  • the limit spring 7 is tilted to prevent the tangential force applied to the limit spring 7 by the end wall of the arcuate groove 8.
  • the eccentric block assembly speed is too slow, the relative position of the movable eccentric block 1 and the fixed eccentric block 2 will be as shown in FIG. 1; at this time, the block 14 blocks the shoulder 15 on the other side of the movable eccentric block 1 to prevent the arc.
  • Slot 8 end wall limit The position spring 7 applies a tangential force to tilt the limit spring 7.
  • a plurality of limiting structures are disposed on a side of the movable eccentric block; the positions of the plurality of limiting structures may be distributed in an arc, and the distance to the axis of the rotating shaft may be the same;
  • the limit device is fixed on the inner side wall, and when the limit device is in the closed state, the limit structure can be matched to limit the relative displacement of the movable eccentric block and the outer casing; thus, the limit pin is passed through the limit pin.
  • the positioning in the hole can realize multi-stage adjustment of the vibration amplitude, and at the same time, the structure of the vibration type vibration device of the vibrating roller; and, in this way, the amplitude can be stably controlled to prevent amplitude shift; in addition, according to the limit spring 7
  • the different pressures at 8 different positions in the arcuate groove automatically select the amplitude corresponding to the rotational speed by the rotation of the eccentric mass assembly.
  • each of the limit structures is not limited to the same distance to the axis of the rotary shaft 3.
  • FIG. 6 is a schematic structural diagram of an eccentric block assembly according to another embodiment of the present invention.
  • the movable eccentric block 1 includes a plurality of limit pin holes 5, wherein the three limit pin holes 5 are shown by 5a, 5b and 5c; the plurality of limit pin holes 5 may be opposite to
  • the axis of the rotating shaft 3 is distributed in an involute; at the same time, the limiting means on the casing 4 comprises a plurality of limiting pins 6 arranged on a straight line passing through the axis of the rotating shaft 3, which are shown by 6a, 6b and 6c in the figure.
  • Three limit pins 6 a plurality of limit pins 6 corresponding to the plurality of limit pin holes 5 - and forming a pair of limit mechanisms, each of the limit mechanism is centered, the limit pin 6 and the axis of the shaft 3
  • the distance between the cores and the distance between the limit pin holes 5 and the axis of the rotary shaft 3 are equal.
  • a limit pin 6 is matched and matched with a limit pin hole 5 (specifically: in one position, 5a and 6a are matched, in another Positions 5b and 6b cooperate), and in the corresponding position, the movable eccentric block 1 is fixed relative to the housing 4, so that the eccentric block assembly has different center of gravity positions; and thus the different limit pins 6 and different limit pin holes 5 mating, the amplitude of the vibration can be adjusted.
  • FIG. 7 is a schematic structural diagram of an eccentric block assembly according to still another embodiment of the present invention.
  • the limiting device on the housing 4 is provided with a limiting pin 6, but the housing 4 is provided with a sliding groove 41 extending in the radial direction; 6 and sliding
  • the groove 41 has a sliding engagement in the radial direction and is slidable relative to the housing 4 as indicated by the arrow in the figure.
  • the predetermined limit pin hole 5 can be made to correspond to the sliding groove 41, and then the limit pin 6 is slid so that the limit pin 6 corresponds to the limit pin hole 5, and the limit is made.
  • the position pin 6 is inserted into the limit pin hole 5 to keep the movable eccentric block 1 and the fixed eccentric block 2 relatively fixed.
  • the connecting sections between the respective limiting pin holes 5 and the axis of the rotating shaft 3 are not on the same straight line, so that the limiting device of the housing 4 can selectively correspond to the plurality of limiting structures.
  • the movable eccentric block 1 and the outer casing 4 can be relatively fixed to adjust the amplitude of the vibration.
  • Embodiments of the present invention also provide a vibratory roller comprising an eccentric mass assembly as described above.
  • the eccentric block assembly provided by the invention and the vibratory roller including the eccentric block assembly can realize multi-stage adjustment of the vibration amplitude by the cooperation of the limit pin and the different limit pin holes, and simultaneously the vibration of the cylindrical vibratory roller
  • the structure of the device, and the vibration amplitude can be stably controlled to prevent the amplitude from shifting.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

一种偏心块总成和振动式压路机,该偏心块总成包括活动偏心块(1)、固定偏心块(2)、转轴(3)和外壳(4),转轴(3)与固定偏心块(2)相固定,与活动偏心块(1)的轴孔滑动配合,活动偏心块(1)的外部设置有与转轴(3)相固定的外壳(4),活动偏心块(1)的侧面上设置有多个限位结构,各限位结构与转轴(3)轴心之间的连线段不在同一直线上,外壳(4)的内侧壁上设有限位装置,与限位结构相配合,限制活动偏心块(1)与外壳(4)的相对位移。振动式压路机包括该偏心块总成,可简化其激振装置的结构。

Description

一种偏心块总成和振动式压路机 本申请要求于 2012 年 06 月 12 日提交中国专利局、 申请号为 201210191906.7、发明名称为"一种偏心块总成和振动式压路机 "的中国专利 申请的优先权, 其全部内容通过引用结合在本申请。 技术领域
本发明涉及机械技术领域, 特别是涉及一种偏心块总成和振动式压路 机。 背景技术
目前, 振动式压路机是公路施工的关键设备。 振动式压路机的钢轮内 部设置有激振装置; 激振装置通过驱动偏心块总成转动, 产生具有一定振 幅和频率的振动, 从而使钢轮对地面产生一定的激振力, 以进行路面的压 实作业。
由于实际的路面情况千差万别, 为了能够根据不同的路面情况施加不 同的激振力, 通过对振动振幅进行多级调节是产生不同激振力一个重要的 途径。 因此, 偏心块总成中一般设置有至少两个偏心场合, 以使激振装置 能够产生大、 小两种振幅的振动。
现有的可以实现振幅多级调节的激振装置, 一般包括多轴多偏心块的 结构, 并通过额外设置的驱动装置实现对产生的振动的振幅进行调节。
然而, 由于采用了多轴多偏心块的结构, 并增加了额外的驱动装置, 使得这种多级调幅的激振装置的结构非常的复杂, 提高了激振装置的制造 成本, 并增大了激振装置拆装的复杂度。 发明内容
本发明的目的在于提供一种偏心块总成, 以筒化振动式压路机的激振 装置的结构。 另外, 还提供一种包括该偏心块总成的振动式压路机。
为此, 本发明实施例采用如下技术方案:
一种偏心块总成, 包括活动偏心块、 固定偏心块和转轴, 转轴穿过活 动偏心块和固定偏心块的轴孔, 与固定偏心块相固定, 并与活动偏心块的 轴孔滑动配合, 活动偏心块外部设置有与转轴相固定的外壳, 其中,
活动偏心块的侧面上设置有多个限位结构, 各限位结构的位置成弧线 分布, 且到转轴轴心的距离相同;
外壳的内侧壁上固定有限位装置, 所述限位装置处于关闭状态时, 与 所述限位结构相配合, 限制活动偏心块与外壳的相对位移。
优选的, 活动偏心块的侧面上设置有弧形槽, 弧形槽的弧心在转轴的 轴心上, 弧形槽的深度由一端向另一端逐渐变深;
外壳的内侧壁上设置有限位弹簧, 限位弹簧一端与所述内侧壁相固定, 限位弹簧的固定位置与弧形槽相对应, 限位弹簧的另一端设置于弧形槽内。
优选的, 限位弹簧在弧形槽内的端部设置有滑块。
优选的, 外壳的内侧壁上设置有弹簧导向装置, 用于控制限位弹簧的 伸缩方向与所述内侧壁垂直。
优选的, 所述弹簧导向装置包括弹簧固定筒, 限位弹簧固定于弹簧固 定筒的底部。
优选的, 所述限位结构具体为限位销孔, 所述限位装置包括限位销; 限位销处于关闭状态时, 插入限位销孔中。
优选的, 相邻的限位销孔之间设置有滑移槽, 滑移槽向其一侧的限位 销孔倾斜, 用于将限位销滑入到限位销孔中。
优选的, 限位销具体为电磁限位销, 在断电状态下, 所述电磁限位销 在其内部弹簧的作用下处于关闭状态, 在通电状态下, 所述电磁限位销在 电磁力的作用下从限位销孔中拔出;
转轴的一端设置有电刷装置, 并设置有电路孔, 电路孔用于在电刷装 置和所述电磁限位销之间设置电路。
优选的, 外壳内设置有挡块, 用于分别在活动偏心块转动到与固定偏 心块方向相同或方向相反的位置时, 挡住活动偏心块不同侧的台肩, 对活 动偏心块进行限位。
一种振动式压路机, 包括如上所述的偏心块总成。
本发明的实施例具有以下优点: 偏心块总成中, 活动偏心块的侧面上 设置有多个限位结构 (如限位销孔), 多个限位结构的位置成弧线分布, 且 到转轴轴心的距离相同; 外壳的内侧壁上固定有限位装置(如限位销), 所 述限位装置处于关闭状态时, 与所述限位结构相配合, 限制活动偏心块与 外壳的相对位移; 从而, 通过限位销与不同限位销孔的配合, 可以实现振 幅的多级调节, 同时筒化振动式压路机激振装置的结构, 而且可以对振幅 进行稳定控制, 防止振幅发生偏移。
另一方案中, 在多个所述限位结构的位置以其他方式分布, 且到转轴 轴心的距离不相同时, 通过使限位装置与多个限位结构可选择性对应且配 合, 也可以实现对振动振幅的多级调节。
进一步的技术方案中, 可以根据限位弹簧在弧形槽中不同位置的不同 压力, 通过偏心块总成的转速的调节来自动选择与转速对应的振幅。
附图说明
图 1为本发明实施例提供的偏心块总成的结构示意图之一;
图 2为本发明实施例提供的偏心块总成的结构示意图之二;
图 3 为本发明实施例提供的偏心块总成中活动偏心块的结构示意图之 图 3-1为图 3中 I-I部分放大结构图;
图 4 为本发明实施例提供的偏心块总成中活动偏心块的结构示意图之 图 5为本发明实施例提供的偏心块总成的结构剖面图;
图 6是本发明另一实施例提供的偏心块总成结构示意图;
图 7是本发明再一实施例提供的偏心块总成结构示意图。
图例说明
I、 活动偏心块 2、 固定偏心块
3、 转轴 4、 外壳
5、 限位销孔 6、 限位销
7、 限位弹簧 8、 弧形槽
9、 滑块 10、 弹簧固定筒
II、 滑移槽 12、 电刷装置
13、 电路孔 14、 挡块
15、 台肩
具体实施方式 下面将结合本发明中的附图, 对本发明中的技术方案进行清楚、 完整 的描述; 显然, 所描述的实施例是本发明的一部分实施例, 而不是全部的 实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性 劳动的前提下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明实施例提供了一种偏心块总成。 如图 1、 图 2所示, 该偏心块总 成包括活动偏心块 1、 固定偏心块 2和转轴 3; 转轴 3穿过活动偏心块 1和 固定偏心块 2的轴孔; 而且, 转轴 3与固定偏心块 2相固定; 转轴 3与活 动偏心块 1的轴孔滑动配合, 以使活动偏心块 1能够相对转轴 3绕转轴 3 的轴线旋转; 活动偏心块 1外部设置有与转轴 3相固定的外壳 4。 其中, 如 图 3和图 3-1所示, 活动偏心块 1的侧面上设置有多个限位结构, 多个限位 结构成弧线分布, 且到转轴 3的轴心的距离相同。 外壳 4的内侧壁上固定 有限位装置; 限位装置处于关闭状态时, 与所述限位结构相配合, 可以限 制活动偏心块 1与外壳 4之间的相对位移。 图 1为活动偏心块 1与固定偏 心块 2方向相同的状态,图 2为活动偏心块 1与固定偏心块 2方向相反(设 活动偏心块 1的轴孔中心与其重心之间的形成第一连线, 固定偏心块 2的 轴孔中心与其重心之间形成第二连线; 所述方向相反为: 相对于转轴 3 的 轴心, 第一连线的方向和第二连线的方向相反) 的状态。 其中, 限位结构 和限位装置可以分别是限位销孔 5和限位销 6;限位销 6可以插入限位销孔 5中; 即限位销 6可以可滑动地与壳体 4配合, 并能够伸出或缩回壳体 4内 侧壁; 在限位销 6伸出时, 处于关闭状态, 可以插入限位销孔 5中, 以限 制活动偏心块 1与外壳 4之间的相对位移; 在限位销 6缩回时, 处于打开 状态, 使活动偏心块 1可以相对于外壳 4旋转。
其中, 固定偏心块 2与转轴 3固定, 而活动偏心块 1可以相对固定偏 心块 2转动; 进而使得活动偏心块 1与固定偏心块 2之间可以具有不同的 角度(该角度为上述第一连线和第二连线之间的夹角 ) 时, 进而使得偏心 块总成具有不同的重心位置; 这样, 偏心块总成在转动的过程中, 可以产 生振幅不同大小的振动。 限位销 6到转轴 3轴心的距离与各限位销孔 5到 转轴 3轴心的距离相同; 限位销 6可以与限位销孔 5相配合; 将限位销 6 插入到限位销孔 5中,使限位机构处于关闭状态; 将限位销 6从限位销孔 5 中拔出, 限位机构处于打开状态时。
一般在正常作业中, 限位销 6处于关闭状态, 保证压路机钢轮具有稳 定的振幅; 在需要对振动的振幅进行调节的时候, 可以使限位销 6处于打 开状态; 进而可以调节活动偏心块 1与固定偏心块 2之间的相对角度, 使 偏心块总成具有不同的重心位置改变。 通过上述结构, 可以实现振动振幅 的多级调节, 而且限位机构处于关闭状态时, 使活动偏心块 1 与固定偏心 块 2相对固定, 可以对振动的振幅进行稳定控制, 防止振幅偏移。
优选的, 如图 3-1所示, 相邻的限位销孔 5之间设置有滑移槽 11 ; 即 在活动偏心块 1侧面上, 相邻的限位销孔 5的开口之间形成滑移槽 11 ; 而 且, 该滑移槽 11可以向其一侧的限位销孔 5倾斜(即滑移槽 11具有一定 的坡度 ), 用于使限位销 6很容易地滑入到一侧的限位销孔 5中。 当限位销 6需要插入到一个限位销孔 5中时,很容易插到两个限位销孔 5之间的活动 偏心块 1 内侧壁上, 这将无法达到对活动偏心块 1限位的目的; 通过设置 滑移槽 11 , 可以在限位销 6下压时, 使限位销 6沿滑移槽 11滑到限位销孔 5中。 优选的, 各滑移槽 11的倾斜的方向可以相同, 即都沿顺时针方向向 活动偏心块 1内部倾斜, 或都沿逆时针方向向活动偏心块 1内部倾斜。
优选的, 上述限位销 6可以为电磁限位销; 在断电状态下, 该电磁限 位销在其内部弹簧的作用下处于关闭状态; 在通电状态下, 电磁限位销在 电磁力的作用下从限位销孔 5 中拔出。 电磁限位销中设置有弹簧; 这样在 断电状态下, 通过弹簧力的作用, 限位销 6保持关闭状态, 即插入到限位 销孔 5 中。 当电磁限位销通电时, 电磁力克服弹簧力将限位销 6从限位销 孔 5中拔出。 当然, 限位销 6除了采用电磁限位销以外, 还可以采用其他 类型的限位销。
优选的, 如图 5所示, 转轴 3的一端设置有电刷装置 12, 并设置有电 路孔 13; 电路孔 13用于在电刷装置 12和所述电磁限位销之间设置电路。 电刷装置 12可以在不影响转轴 3转动的基础上, 将设置在压路机钢轮中的 固定电路与转轴 3中的旋转电路导通。 电路孔 13可以包括轴向部分和径向 部分; 电路孔 13的径向部分穿过转轴 3和固定偏心块 2, 电路从转轴 3的 一端开始先穿过轴向部分再穿过径向部分, 最终连接到外壳 4 的电磁限位 销上。
优选的, 如图 4所示, 活动偏心块 1的侧面上可以设置有弧形槽 8; 弧 形槽 8的弧心在转轴 3的轴心上, 且弧形槽 8的深度由一端向另一端逐渐 变深(可见, 弧形槽 8的底部为螺旋状的斜面); 外壳 4的内侧壁上设置有 限位弹簧 7, 限位弹簧 7—端与外壳 4的内侧壁相固定; 限位弹簧 7的固定 位置与弧形槽 8相对应; 限位弹簧 7的另一端伸入弧形槽 8内, 且限位弹 簧 7对弧形槽 8的底部斜面具有相应压力; 这样, 在自由状态下, 限位弹 簧 7对弧形槽 8的底部斜面的压力的切向分量可以驱动活动偏心块 1转动。 其中, 限位弹簧 7在弧形槽 8内的端部可以设置滑块 9, 该滑块 9可以为半 球形, 以减小与弧形槽 8之间的磨擦。
优选的, 限位结构和弧形槽 8分别设置于活动偏心块 1的两个相反的 侧面上。 这样, 可以防止部件间相互干涉, 方便部件位置的设置。
使限位弹簧 7—端与外壳 4的内侧壁相固定, 固定位置与弧形槽 8相 对应, 且使限位弹簧 7的另一端设置于弧形槽 8内; 限位弹簧 7可以与外 壳 4的内侧壁垂直, 其固定位置到转轴 3轴心的距离可以与弧形槽 8的半 径相同。
如图 1所示, 在限位销 6处于打开状态, 且活动偏心块 1和固定偏心 块 2 自然下垂时, 限位弹簧 7的位置优选设置于此状态下的弧形槽 8较深 的一端。 在该图中所示的状态下, 当对振动的振幅进行设置时, 可以将偏 心块总成逆时针转动。 限位弹簧 7将会沿弧形槽 8滑动, 限位弹簧 7逐渐 被压缩,进而使相应的限位弹簧 7对弧形槽 8底部斜面的压力随限位弹簧 7 的压缩而逐渐增大。 此压力的切向分量将随限位弹簧 7 的压缩逐渐增大, 并驱动活动偏心块 1开始转动。 在活动偏心块 1转动过程中, 当离心力的 切向分量与弹簧压力的切向分量相互平衡时, 活动偏心块 1随转轴 3进入 匀速转动状态。 因为在不同的转速下, 活动偏心块 1 的离心力不同, 与之 达到平衡的弹簧压力也会不同。 所以, 当活动偏心块 1 达到稳定的勾速转 动状态时, 每一个特定的转速, 都对应有一个特定的弹簧压力, 即对应限 位弹簧 7在弧形槽 8中的一个特定位置。 因此, 偏心块总成的不同转速对 应活动偏心块 1和固定偏心块 2间的不同角度。 在确定此对应关系之后, 便可以通过对转速的调节来对振动的振幅进行设置。 并在转速稳定后, 将 限位销 6关闭, 以锁定当前的振幅。
如果限位弹簧 7发生倾斜, 其提供的弹簧力将无法与其位置准确的对 应, 这将导致无法根据转速调节得到准确的振动的振幅。 所以, 优选的, 在外壳 4的内侧壁上可以设置弹簧导向装置, 用于保持限位弹簧 7的伸缩 方向与外壳 4的内侧壁之间的垂直。该弹簧导向装置可以是弹簧固定筒 10, 限位弹簧 7固定于弹簧固定筒 10的底部; 弹簧固定筒 10可以防止弹簧发 生倾斜。
优选的, 外壳 4内可以设置挡块 14; 挡块 14用于分别在活动偏心块 1 转动到与固定偏心块 2 方向相同或方向相反的位置时, 挡住活动偏心块 1 不同侧的台肩 15, 对活动偏心块 1进行限位。
如图 1所示, 限位销 6处于打开状态, 且活动偏心块 1和固定偏心块 2 自然下垂, 且活动偏心块 1与固定偏心块 2方向相同时, 可以使活动偏心 块 1两侧的台肩 15处于水平状态。 可以优选的将挡块 14设置于, 在该状 态下, 靠近弧形槽 8较浅一端的台肩 15上方, 并与此台肩 15相接触。 这 样, 当偏心块总成转速过快时, 活动偏心块 1与固定偏心块 2的相对位置 将如图 2所示; 这时, 挡块 14可以挡住活动偏心块 1一侧的台肩 15 , 以防 止弧形槽 8端壁对限位弹簧 7施加的切向力使限位弹簧 7倾斜。 当偏心块 总成转速过慢时, 活动偏心块 1与固定偏心块 2的相对位置将如图 1所示; 这时,挡块 14挡住活动偏心块 1另一侧的台肩 15, 防止弧形槽 8端壁对限 位弹簧 7施加切向力使限位弹簧 7倾斜。
本发明实施例提供的偏心块总成中, 活动偏心块的侧面上设置有多个 限位结构; 多个限位结构的位置可以成弧线分布, 且到转轴轴心的距离可 以相同; 外壳的内侧壁上固定有限位装置, 所述限位装置处于关闭状态时, 可以与所述限位结构相配合, 限制活动偏心块与外壳的相对位移; 从而, 通过限位销在不同限位销孔中的定位, 可以实现振动振幅的多级调节, 同 时筒化振动式压路机激振装置的结构; 而且, 这样还可以对振幅进行稳定 控制, 防止振幅偏移; 另外, 可以根据限位弹簧 7在弧形槽中 8不同位置 的不同压力, 通过偏心块总成的旋转来自动选择与转速对应的振幅。
根据上述描述可以理解, 各所述限位结构不限于到转轴 3轴心的距离 相同。请参考图 6,该图是本发明另一实施例提供的偏心块总成结构示意图。 该偏心块总成中, 比如: 活动偏心块 1 包括多个限位销孔 5 , 图中用 5a、 5b和 5c示出三个限位销孔 5; 多个限位销孔 5可以相对于转轴 3的轴心呈 渐开线分布; 同时, 使壳体 4上的限制装置包括多个在通过转轴 3的轴心 的直线上布置的限位销 6, 图中用 6a、 6b和 6c示出三个限位销 6; 多个限 位销 6与多个限位销孔 5——对应, 并形成限位机构对, 每个限位机构对 中, 限位销 6与转轴 3的轴心之间的距离和限位销孔 5与转轴 3的轴心之 间的距离相等。 在活动偏心块 1相对于壳体 4具有不同的位置时, 使一个 限位销 6与一个限位销孔 5对应且配合 (具体可以是: 在一个位置, 使 5a 与 6a配合, 在另一个位置 5b与 6b配合), 进而在相应的位置使活动偏心 块 1相对于壳体 4保持固定, 使偏心块总成具有不同重心位置; 进而使不 同的限位销 6与不同的限位销孔 5配合, 可以对振动的振幅进行调节。
请参考图 7, 该图是本发明再一实施例提供的偏心块总成结构示意图。 与图 6中所示的实施例不同, 该实施例中, 使壳体 4上的限制装置一个限 位销 6, 但壳体 4上设置有一个沿径向延伸的滑动槽 41 ; 限位销 6与滑动 槽 41有径向方向滑动配合, 能够沿图中箭头所示相对于壳体 4滑动。 在对 振动的振幅进行调节时, 可以使预定的限位销孔 5与滑动槽 41相对应, 然 后, 滑动限位销 6, 使限位销 6与该限位销孔 5对应, 并使限位销 6插入限 位销孔 5中, 以使活动偏心块 1与固定偏心块 2保持相对固定。
根据上述描述, 可以理解, 使各限位销孔 5与转轴 3的轴心之间的连 线段不在同一直线上, 使壳体 4 的限位装置与多个限位结构可选择性地对 应且配合, 就可以使使活动偏心块 1与外壳 4相对固定, 实现对振动的振 幅进行调节。
本发明实施例还提供了一种振动式压路机, 包括如上所述的偏心块总 成。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域 的普通技术人员来说, 在不脱离本发明原理的前提下, 还可以做出若干 改进和润饰, 这些改进和润饰也应视为本发明的保护范围。
工业实用性
本发明提供的偏心块总成和包括该偏心块总成的振动式压路机, 通过 限位销与不同限位销孔的配合, 可以实现振动振幅的多级调节, 同时筒化 振动式压路机激振装置的结构, 而且可以对振动振幅进行稳定控制, 防止 振幅发生偏移。

Claims

权利要求书
1、 一种偏心块总成, 用于振动式压路机, 其特征在于, 包括活动偏心 块(1)、 固定偏心块(2)、 转轴 (3)和外壳 (4); 所述转轴 (3) 与固定 偏心块(2)相固定, 且与活动偏心块(1)的轴孔滑动配合; 所述外壳(4) 位于所述活动偏心块(1) 的外部, 且与转轴(3)相固定;
活动偏心块(1)的侧面上具有多个限位结构, 各所述限位机构与所述 转轴 (3)轴心之间的连线段不在同一直线上; 所述外壳 (4) 的内侧壁具 有限位装置, 所述限位装置与多个限位结构可选择性地对应且配合; 所述 限位装置与一个所述限位结构相配合时, 所述活动偏心块(1)与外壳(4) 相对固定。
2、 如权利要求 1所述的偏心块总成, 其特征在于,
所述活动偏心块(1 ) 的侧面上设置有弧形槽(8), 弧形槽(8) 的弧 心在转轴(3) 的轴心上; 弧形槽(8) 的深度由一端向另一端逐渐变深; 外壳 (4) 的内侧壁上设置有限位弹簧(7), 限位弹簧(7)—端与所 述内侧壁相固定, 限位弹簧(7) 的另一端设置于弧形槽(8) 内。
3、 如权利要求 2所述的偏心块总成, 其特征在于, 限位弹簧(7)在 弧形槽(8) 内的端部设置有滑块(9)。
4、 如权利要求 2所述的偏心块总成, 其特征在于, 所述限位弹簧(7) 的固定位置与弧形槽(8)相对应; 外壳 (4) 的内侧壁上设置有保持限位 弹簧(7) 的伸缩方向与所述外壳 (4) 的内侧壁垂直的弹簧导向装置。
5、 如权利要求 4所述的偏心块总成, 其特征在于, 所述弹簧导向装置 包括弹簧固定筒 (10), 限位弹簧(7)—端固定于所述弹簧固定筒 (10) 的底部。
6、 如权利要求 1至 5任一项所述的偏心块总成, 其特征在于, 多个所 述限位结构的位置成弧线分布, 且到转轴 (3)轴心的距离相同。
7、 如权利要求 6所述的偏心块总成, 其特征在于, 所述限位结构具体 为限位销孔( 5 ), 所述限位装置具体为限位销 ( 6 )。
8、 如权利要求 7所述的偏心块总成, 其特征在于, 在活动偏心块(1 ) 侧面上, 相邻的限位销孔(5)开口之间设置有滑移槽(11 ); 所述滑移槽
( 11 ) 向其一侧的限位销孔( 5 )倾斜。
9、 如权利要求 7所述的偏心块总成, 其特征在于, 限位销 (6)具体 为电磁限位销; 转轴(3) 的一端设置有电刷装置(12); 所述转轴(3)设 置有电路孔( 13 ), 电路孔( 13 ) 中设置有连通所述电刷装置( 12 )和所述 电磁限位销的电路。
10、 如权利要求 1至 5任一项所述的偏心块总成, 其特征在于, 外壳(4) 内设置有挡块(14); 在所述活动偏心块(1 )转动到与固定 偏心块(2)方向相同或方向相反的位置时, 所述挡块(14)与所述活动偏 心块( 1 ) 的一个台肩 ( 15 )相抵触。
11、 根据权利要求 1至 5任一项所述的偏心块总成, 其特征在于, 所 述限位结构为限位销孔 5, 所述限制装置包括多个限位销(6); 多个所述限 位销 (6) 与多个所述限位销孔(5)——对应, 并形成限位机构对; 每个 所述限位机构对中, 所述限位销 (6) 与所述转轴 (3) 的轴心之间的距离 和所述限位销孔(5)与所述转轴 (3) 的轴心之间的距离相等。
12、 一种振动式压路机, 其特征在于, 包括如权利要求 1-11任一项所 述的偏心块总成。
PCT/CN2012/086033 2012-06-12 2012-12-06 一种偏心块总成和振动式压路机 WO2013185450A1 (zh)

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