WO2019056290A1 - 带传动张紧装置 - Google Patents

带传动张紧装置 Download PDF

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Publication number
WO2019056290A1
WO2019056290A1 PCT/CN2017/102897 CN2017102897W WO2019056290A1 WO 2019056290 A1 WO2019056290 A1 WO 2019056290A1 CN 2017102897 W CN2017102897 W CN 2017102897W WO 2019056290 A1 WO2019056290 A1 WO 2019056290A1
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WO
WIPO (PCT)
Prior art keywords
transmission shaft
belt
turntable
driven wheel
tensioning device
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Application number
PCT/CN2017/102897
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English (en)
French (fr)
Inventor
谢继发
Original Assignee
深圳市比思维科技有限公司
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Application filed by 深圳市比思维科技有限公司 filed Critical 深圳市比思维科技有限公司
Priority to PCT/CN2017/102897 priority Critical patent/WO2019056290A1/zh
Publication of WO2019056290A1 publication Critical patent/WO2019056290A1/zh

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains

Definitions

  • the invention relates to the technical field of belt transmission, in particular to a belt drive tensioning device.
  • belt drive is widely used in various transmission fields, especially in the transmission field of two-wheel and three-wheel vehicles.
  • the tensioning device that applies positive pressure to the belt is usually tensioned by an external adjusting mechanism, but the external adjusting mechanism has a complicated structure and is not compact, and cannot be adjusted according to the actual use of the belt.
  • the positive pressure exerted on the belt reduces the transmission efficiency and reliability of the entire belt drive.
  • the object of the present invention is to provide a belt drive tensioning device, which aims to solve the technical problem that the belt in the prior art can not be adjusted in time.
  • the present invention employs a belt drive tensioning device including a driving wheel, a driven wheel, a belt and an adjusting mechanism, the driving wheel being disposed opposite to the driven wheel, a belt is enclosed around the driving wheel and the driven wheel circumference, the adjusting mechanism includes a turntable, a first transmission shaft and a second transmission shaft, and the second transmission shaft central axis coincides with the rotation axis of the rotary table,
  • the turntable has a first mounting hole, the first mounting hole axis is offset from the rotating shaft axis by a predetermined distance, one end of the first transmission shaft is fixedly connected with the driven wheel, and the other end of the first transmission shaft is worn. Passing through the first mounting hole and rotatably connecting with the second transmission shaft, the driven wheel rotates with the turntable to change the distance between the driving wheel and the driven wheel.
  • first transmission shaft has a plurality of first protrusions in a circumferential direction away from one end of the driven wheel
  • the second transmission shaft has a plurality of second protrusions in a circumferential direction of one end of the turntable, the first a raised and The second protrusions are engaged.
  • the second transmission shaft has a connecting sleeve
  • the connecting sleeve is located at an end of the second transmission shaft near the rotating disc
  • the first transmission shaft portion is disposed in the connecting sleeve
  • the second protrusion Provided on the inner side wall of the connecting sleeve
  • the adjustment mechanism further includes a fixing seat, the fixing base is fixedly connected to the turntable, the fixing base has a second mounting hole, and the first transmission shaft is loaded away from an end of the second transmission shaft Second mounting hole.
  • the belt drive tensioning device further comprises a housing, the housing has a receiving cavity, the driving wheel and the driven wheel, and the belt is received in the receiving cavity.
  • the housing has a mounting base disposed in the receiving cavity and located on an inner side wall of the housing, and the turntable is adapted to the mounting base and detachably connected.
  • the belt drive tensioning device further comprises a baffle fixedly connected to the inner side wall of the casing and in contact with the turntable.
  • the turntable is provided with an arcuate groove, the turntable is rotated to a preset position, and the bolt passes through the arcuate groove and is fixed to the mounting table, so that the turntable is abutted and fixed to the casing.
  • the driven wheel has a plurality of third protrusions, and the third protrusion is evenly disposed on the contact side of the driven wheel and the belt.
  • a belt drive tensioning device of the present invention is rotatably coupled to the second transmission shaft via the first transmission shaft, the first transmission shaft is fixedly coupled to the turntable, and the first transmission shaft is inserted a first mounting hole of the turntable, a central axis of the first mounting hole is spaced apart from a rotation axis of the turntable by a predetermined distance, and a rotation axis of the turntable coincides with the second drive shaft,
  • the turntable rotates at a certain angle, the driven wheel moves with the first transmission shaft, and the center distance between the driven wheel and the driving wheel changes, thereby realizing tensioning of the belt, and timely adjusting the tension of the belt.
  • Figure 1 is a schematic view showing the structure of the belt drive tensioning device of the present invention
  • FIG. 2 is a schematic structural view of a driving wheel, a driven wheel, a belt and a turntable according to the present invention
  • FIG. 3 is a schematic structural view of a first transmission shaft, a second transmission shaft, and a driven wheel according to the present invention
  • FIG. 4 is a schematic structural view of a first transmission shaft and a second transmission shaft according to the present invention.
  • Figure 5 is a front elevational view of the turntable of the present invention.
  • Figure 6 is a rear elevational view of the turntable of the present invention.
  • the belt drive tensioning device in the prior art generally adopts two forms, one of which is to design a support rod with adjustable distance, one end of the support rod is connected to the driving wheel, and the other end is connected with the driven wheel.
  • the length of the support rod is adjusted, and then the center distance between the driving wheel and the driven wheel is changed to realize the tension of the belt.
  • the support rod moves the position of the driven wheel, which results in uneven force of the driven wheel and the transmission system of the next stage, which not only complicates the transmission structure, but also affects the power transmission effect and increases the wear of the belt.
  • the second is to set a tensioning wheel next to the belt and tension the belt through the tensioning wheel.
  • the belt drive tensioning device 100 comprises a driving wheel 10 , a driven wheel 20 , a belt 30 and an adjusting mechanism 40 , and the driving wheel 10 is disposed opposite to the driven wheel 20 .
  • the belt 30 is enclosed around the circumference of the driving wheel 10 and the driven wheel 20, and the adjusting mechanism 40 includes a turntable 41, a first drive shaft 42 and a second drive shaft 43.
  • the central axis of the second drive shaft 43 coincides with the rotation axis of the turntable 41.
  • the turntable 41 has a first mounting hole 411, and the first mounting hole The axis of the 411 is offset from the axis of rotation of the turntable 41 by a predetermined distance.
  • the belt drive tensioning device 100 can be used in a transmission system of various types of vehicles, particularly for a powertrain of a two- or three-wheel small-sized vehicle such as a motorcycle, an electric vehicle, or a tricycle.
  • the transmission mode of the belt transmission device is an open transmission, and the driving wheel 10 and the driven wheel 20 are oppositely disposed, and both are located inside the belt 30.
  • the inner side wall of the belt 30 is in close contact with the driving wheel 10 and the driven wheel 20, and the driving wheel 10 rotates to drive the belt 30 to move, and the driven wheel 20 is driven by the friction force.
  • the wheel 10 rotates in synchronization.
  • the transmission of the belt transmission may also be a cross-drive or a semi-cross drive to achieve substantially the same technical effects as the former.
  • the driven wheel 20 is engaged with the first transmission shaft 42 .
  • the first transmission shaft 42 and the driven shaft are respectively provided with a card slot, and a flat key is inserted in the card slot.
  • the driven wheel 20 is relatively fixed to the first transmission shaft 42.
  • the first transmission shaft 42 is inserted into the mounting hole of the turntable 41. Since the axis of the mounting hole is offset from the rotation axis of the turntable 41 by a certain distance, when the turntable 41 rotates, the driven wheel 20 follows The first transmission shaft 42 moves, and the center distance of the driven wheel 20 and the driving wheel 10 changes to achieve tensioning of the belt 30.
  • the first transmission shaft 42 and the second transmission shaft 43 are rotatably connected, and an axis of the second rotation shaft and an axis of rotation of the turntable 41 coincide with each other.
  • the first transmission shaft 42 rotates with the turntable 41, that is, the first transmission shaft 42 moves circumferentially about the axis of the two rotating shafts to ensure the first transmission shaft 42 and the second transmission shaft 43.
  • the movement between the rollers 20 is smooth, and the rotation of the driven wheel 20 can be efficiently transmitted to the second transmission shaft 43.
  • the aperture of the first mounting hole 411 changes, which affects the tension of the belt 30.
  • a bearing is disposed between the first transmission shaft 42 and the turntable 41.
  • the bearing may be an angular contact ball bearing, a thrust ball bearing, a self-aligning ball bearing, a tapered roller bearing, a cylindrical roller bearing, etc.
  • the bearing is excellent.
  • the bearing may be disposed adjacent to the side of the second transmission shaft 43 The oil seal is disposed, and the oil seal opening faces the second transmission shaft 43 to prevent the lubricating oil from leaking onto the belt 30 when the first transmission shaft 42 and the second transmission shaft 43 are rotated, causing the belt 30 to slip.
  • the invention provides a belt drive tensioning device, which is rotatably connected to the second transmission shaft through the first transmission shaft, the first transmission shaft is fixedly connected with the rotary table, and then the first transmission shaft is inserted a first mounting hole of the turntable, a central axis of the first mounting hole is spaced apart from a rotation axis of the turntable by a predetermined distance, and a rotation axis of the turntable coincides with the second drive shaft,
  • the turntable rotates at a certain angle, the driven wheel moves with the first transmission shaft, and the center distance between the driven wheel and the driving wheel changes, thereby realizing tensioning of the belt, and timely adjusting the tension of the belt.
  • the first transmission shaft 42 has a plurality of first protrusions 421 away from the circumferential direction of one end of the driven wheel 20, and the second transmission shaft 43 has a plurality of second portions in the circumferential direction of one end of the turntable 41.
  • the protrusion 431 is engaged with the second protrusion 431.
  • a plurality of the first protrusions 421 are evenly distributed in the circumferential direction of the first transmission shaft 42, and a plurality of the second protrusions 431 are evenly distributed in the
  • the second transmission shaft 43 is circumferentially, the first rotation shaft and the second transmission shaft 43 are gear shafts, and the first transmission shaft 42 and the second transmission shaft 43 are drivingly connected.
  • a transmission shaft 42 is provided with a plurality of the first protrusions 421, and the second transmission shaft 43 is provided with a plurality of the second protrusions 431, and the first protrusions 421 and the second protrusions 431.
  • the cross-sectional shape of the first protrusion 421 and the second protrusion 431 may be an involute tooth shape, a circular arc tooth shape, and a wedge shape, and the involute is superior, and the first transmission shaft is ensured. Transmission stability between the 42 and the second drive shaft 43.
  • the second transmission shaft 43 has a connecting sleeve 432, the connecting sleeve 432 is located at one end of the second transmission shaft 43 near the turntable 41, and the first transmission shaft 42 is partially disposed on the connecting sleeve 432.
  • the second protrusion 431 is disposed on an inner sidewall of the connecting sleeve 432.
  • the first transmission shaft 42 is an external gear shaft
  • the second transmission shaft 43 is an internal gear shaft
  • the inner side wall of the connecting sleeve 432 is evenly distributed.
  • the second protrusion 431 is partially inserted into the connecting sleeve 432 such that the first protrusion 421 is engaged with the second protrusion 431, that is, the first transmission shaft 42 Engaging with the second transmission shaft 43 and compacting the structure, the relative sliding speed between the first protrusion 421 and the second protrusion 431 is small, so that the rotation of the first transmission shaft 42 can be effectively transmitted to The second transmission shaft 43.
  • the connection manner of the first transmission shaft 42 and the second transmission shaft 43 is externally engaged to achieve substantially the same technical effect.
  • the adjustment mechanism 40 further includes a fixing base 44, the fixing base 44 is fixedly connected with the turntable 41, the fixing base 44 has a second mounting hole 45, and the first transmission shaft 42 is away from the first One end of the second transmission shaft 43 is fitted into the second mounting hole 45.
  • the fixing base 44 and the turntable 41 are connected by bolts, in order to prevent the first transmission shaft 42 from being away from the end of the second transmission shaft 43 .
  • the second mounting hole 45 is defined in the fixing base 44.
  • the first transmission shaft 42 is inserted into the second mounting hole 45 away from the end end of the second transmission shaft 43.
  • the first transmission shaft A bearing is disposed between the 42 and the second mounting hole 45 to ensure reliable support of the first transmission shaft 42 by the fixing base 44.
  • the belt drive tensioning device 100 further includes a housing 50 having a receiving cavity, the driving wheel 10 and the driven wheel 20, and the belt 30 being received in the receiving cavity.
  • the housing 50 includes a left shell and a right shell, and the left shell and the right shell are connected by bolts.
  • the driving wheel 10, the driven wheel 20 and the belt 30 are sequentially loaded into the left or right casing, and then the right or left casing of the other side is closed.
  • the driving wheel 10, the driven wheel 20 and the belt 30 are housed in the accommodating cavity formed by the casing 50 to prevent impurities from entering the belt 30 and the active when the belt 30 is in operation.
  • the housing 50 has a mounting base 51 disposed in the receiving cavity and located at an inner side wall of the housing 50, and the turntable 41 is fitted with the mounting base 51, and Removable connection.
  • the turntable 41 is provided with an arcuate groove 412.
  • the turntable 41 is rotated to a preset position, and the bolt passes through the arcuate groove 412 and is fixed to the mounting table 51, so that the turntable 41 and the casing 50 are Resist the fixed.
  • the belt drive tensioning device 100 further includes a baffle 60 fixedly coupled to the inner side wall of the housing 50 and in contact with the turntable 41. As shown in FIG. 1 , FIG. 5 and FIG.
  • the inner side wall of the casing 50 is concavely formed to form the mounting base 51 .
  • the mounting base 51 is circular, and has a shape and a size of the turntable 41 .
  • the turntable 41 is conveniently mounted on the housing 50.
  • the arcuate groove 412 is opened in the turntable 41, and the number of the arcuate grooves 412 is plural, and is evenly distributed along the rotation axis of the turntable 41.
  • the turntable 41 is rotated to a preset position, and the bolt passes through the
  • the arcuate groove 412 presses the turntable 41 against the casing 50 to prevent the turntable 41 from rotating relative to each other during operation of the belt drive tensioning device 100, thereby causing the belt 30 to relax.
  • the baffle 60 is disposed outside the turntable 41, and the baffle 60 is a bent plate member, and one end of the baffle 60 and the shell The body 50 is bolted and the other end is in contact with the outer edge of the turntable 41.
  • the driven wheel 20 has a plurality of third protrusions 21 that are evenly disposed on the contact side of the driven wheel 20 and the belt 30.
  • the driven wheel 20 is uniformly provided with a plurality of third protrusions 21 to increase the friction between the driven wheel 20 and the belt 30, thereby improving transmission efficiency.
  • the third protrusion 21 may also be disposed on the driving wheel 10, and substantially the same technical effect has been reached.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

一种带传动张紧装置,包括主动轮(10)、从动轮(20)、皮带(30)和调节机构(40),主动轮(10)与从动轮(20)相对设置,皮带(30)围合于主动轮(10)和从动轮(20)周缘。调节机构(40)包括转盘(41)、第一传动轴(42)和第二传动轴(43),第二传动轴(43)中心轴线与转盘(41)转动轴线重合。转盘(41)具有第一安装孔(411),第一安装孔轴线到转盘转动轴线偏置预设距离。通过第一传动轴(42)与第二传动轴(43)转动连接,第一传动轴(42)与转盘(41)固定连接,再将第一传动轴(42)插入转盘(41)的第一安装孔(411),转盘(41)的转动轴线与第二传动轴(43)重合,转盘(41)转动一定角度,从动轮(20)随第一传动轴(42)运动,进而从动轮(20)与主动轮(10)中心距改变,实现皮带(30)的张紧,方便对皮带的张紧情况及时调节,提高了带传动的传动效率,延长了皮带的使用寿命。

Description

带传动张紧装置 技术领域
本发明涉及带传动技术领域,尤其涉及一种带传动张紧装置。
背景技术
带传动作为一种常见的传动方式,被人们广泛的用于各种传动领域,特别在二轮、三轮交通工具的传动领域中使用尤其广泛。
在带传动的工作过程中,由于皮带容易松弛,需要对皮带施加正压力,保证皮带不出现打滑的情况。
在现在市场上对皮带施加正压力的张紧装置,通常通过外置的调节机构对皮带张紧,但外置的调节机构结构复杂,紧凑度不高,不能根据皮带的实际使用情况,及时调节对皮带施加的正压力,进而使得整个带传动的传动效率和可靠性降低。
发明内容
本发明的目的在于提供一种带传动张紧装置,旨在解决现有技术中的带传动中皮带不能及时调节的技术问题。
为实现上述目的,本发明采用的一种带传动张紧装置,所述带传动张紧装置包括主动轮、从动轮、皮带和调节机构,所述主动轮与所述从动轮相对设置,所述皮带围合于所述主动轮和所述从动轮周缘,所述调节机构包括转盘、第一传动轴和第二传动轴,所述第二传动轴中心轴线与所述转盘转动轴线重合,所述转盘具有第一安装孔,所述第一安装孔轴线到所述转盘转动轴线偏置预设距离,所述第一传动轴一端与所述从动轮固定连接,所述第一传动轴另一端穿过所述第一安装孔,并与所述第二传动轴转动连接,所述从动轮随所述转盘转动,用以改变所述主动轮与所述从动轮之间的距离。
其中,所述第一传动轴远离所述从动轮一端的周向具有多个第一凸起,所述第二传动轴靠近所述转盘一端的周向具有多个第二凸起,所述第一凸起与 所述第二凸起啮合。
其中,所述第二传动轴具有连接套,所述连接套位于所述第二传动轴靠近所述转盘一端,所述第一传动轴部分置于所述连接套内,所述第二凸起设于所述连接套内侧壁
其中,所述调节机构还包括固定座,所述固定座与所述转盘固定连接,所述固定座具有第二安装孔,所述第一传动轴远离所述第二传动轴一端装入所述第二安装孔。
其中,所述带传动张紧装置还包括壳体,所述壳体具有容纳腔,所述主动轮和从动轮,以及所述皮带收容于所述容纳腔内。
其中,所述壳体具有安装台,所述安装台设于所述容纳腔内,并位于所述壳体内侧壁,所述转盘与所述安装台适配,并可拆卸连接。
其中,所述带传动张紧装置还包括挡板,所述挡板固定连接于所述壳体内侧壁,并与所述转盘抵触。
其中,所述转盘开设有弧形槽,所述转盘转动到预设位置,螺栓穿过所述弧形槽,固定于所述安装台,使得所述转盘与所述壳体抵持固定。
其中,所述从动轮具有多个第三凸起,所述第三凸起均匀设置于所述从动轮与所述皮带接触周侧。
本发明的一种带传动张紧装置,通过所述第一传动轴与所述第二传动轴转动连接,所述第一传动轴与所述转盘固定连接,再将所述第一传动轴插入所述转盘的所述第一安装孔,所述第一安装孔的中心轴线与所述转盘的转动轴线间隔一个预设距离,所述转盘的转动轴线与所述第二传动轴重合,所述转盘转动一定角度,所述从动轮随所述第一传动轴运动,进而所述从动轮与所述主动轮中心距改变,实现所述皮带的张紧,方便对皮带的张紧情况及时调节,提高了带传动的传动效率,延长了皮带的使用寿命。
附图说明
为了更清楚地说明本发明实施例技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以 根据这些附图获得其他的附图。
图1是本发明带传动张紧装置的结构示意图;
图2是本发明主动轮、从动轮、皮带和转盘的结构示意图;
图3是本发明第一传动轴、第二传动轴和从动轮的结构示意图;
图4是本发明第一传动轴和第二传动轴的结构示意图;
图5是本发明转盘的正视图;
图6是本发明转盘的后视图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,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。
需要说明地是,在现有的技术中的带传动张紧装置,一般采用两种形式,其一是设计一种可调节距离的支撑杆,支撑杆一端连接主动轮,另外一端与从动轮连接,在需要对皮带进行张紧时,调节支撑杆的长度,进而改变主动轮与从动轮的中心距,实现皮带的张紧。但采用该方式,支撑杆使从动轮的位置移动,从而导致从动轮与其下一级的传动系统受力不均,不仅使得传动结构变复杂,还会影响动力传动效果和增加皮带的磨损。其二是在皮带旁设置张紧轮,通过张紧轮对皮带进行张紧。但采用该方式,需要对张紧轮设置额外的驱动机构和悬臂支撑机构,且驱动机构需要设于带传动区域外,进而导致张紧装置的紧凑度不高,结构复杂,空间占用量大,使得整个带传动的平稳性和可靠性降低。此外,由于主动轮、从动轮及张紧轮的支撑刚度较弱,十分容易出现皮带受力波动,当对皮带的正压力处于波峰时,皮带受力过大被过于压紧,容易导致寿命降低、输出电机卡死损坏的情况,当对皮带的正压力处于波谷时,皮带受力太小进而松弛,使得带传动的稳定性和精度的下降。
请参阅图1、图2和图3,所述带传动张紧装置100包括主动轮10、从动轮20、皮带30和调节机构40,所述主动轮10与所述从动轮20相对设置,所述皮带30围合于所述主动轮10和所述从动轮20周缘,所述调节机构40包括 转盘41、第一传动轴42和第二传动轴43,所述第二传动轴43中心轴线与所述转盘41转动轴线重合,所述转盘41具有第一安装孔411,所述第一安装孔411轴线到所述转盘41转动轴线偏置预设距离,所述第一传动轴42一端与所述从动轮20固定连接,所述第一传动轴42另一端穿过所述第一安装孔411,并与所述第二传动轴43转动连接,所述从动轮20随所述转盘41转动,用以改变所述主动轮10与所述从动轮20之间的距离。可以理解,所述带传动张紧装置100可以用于各类交通工具的传动系统中,特别是用于摩托车、电动车、三轮车等二轮或三轮的小型交通工具的动力总成中。
在本实施方式中,所述带传动装置的传动方式为开口传动,主动轮10和所述从动轮20相对设置,并均位于所述皮带30的内侧。所述皮带30内侧壁与所述主动轮10和所述从动轮20紧密接触,所述主动轮10转动,带动皮带30运动,进而所述从动轮20在摩擦力的作用下,随所述主动轮10同步进行转动。在其他实施方式中,所述带传动装置的传动方式还可以是交叉传动或半交叉传动,以达到与前者基本相同的技术效果。
在本实施方式中,所述从动轮20与所述第一传动轴42卡接,所述第一传动轴42与所述从动轴上分别设有卡槽,在卡槽内装入平键,使得所述从动轮20与所述第一传动轴42相对固定。所述第一传动轴42插入所述转盘41的所述安装孔内,由于所述安装孔的轴线偏离所述转盘41的转动轴线一定距离,所述转盘41转动时,所述从动轮20随所述第一传动轴42运动,进而所述从动轮20与所述主动轮10中心距改变,实现对所述皮带30的张紧。
在本实施方式中,所述第一传动轴42和所述第二传动轴43转动连接,所述第二转动轴的轴线与所述转盘41的转动的轴线相互重合。所述第一传动轴42随所述转盘41转动,即所述第一传动轴42绕所述二转动轴的轴线做圆周运动,保证所述第一传动轴42和所述第二传动轴43之间运动平稳,所述从动轮20的转动能有效传递到所述第二传动轴43上。为了减少所述第一传动轴42在转动时对所述转盘41的造成磨损,使得所述第一安装孔411的孔径变化,影响皮带30张紧。在所述第一传动轴42和所述转盘41之间设置轴承,轴承可以为角接触球轴承、推力球轴承、调心球轴承、圆锥滚子轴承、圆柱滚子轴承等,以调心球轴承为优。此外,轴承靠近所述第二传动轴43一侧还可以设 置油封,油封开口朝向第二传动轴43,防止所述第一传动轴42与所述第二传动轴43转动时,润滑油泄露到所述皮带30上,造成所述皮带30打滑。
本发明提供一种带传动张紧装置,通过所述第一传动轴与所述第二传动轴转动连接,所述第一传动轴与所述转盘固定连接,再将所述第一传动轴插入所述转盘的所述第一安装孔,所述第一安装孔的中心轴线与所述转盘的转动轴线间隔一个预设距离,所述转盘的转动轴线与所述第二传动轴重合,所述转盘转动一定角度,所述从动轮随所述第一传动轴运动,进而所述从动轮与所述主动轮中心距改变,实现所述皮带的张紧,方便对皮带的张紧情况及时调节,提高了带传动的传动效率,延长了皮带的使用寿命。
进一步地,所述第一传动轴42远离所述从动轮20一端的周向具有多个第一凸起421,所述第二传动轴43靠近所述转盘41一端的周向具有多个第二凸起431,所述第一凸起421与所述第二凸起431啮合。如图3和图4所示,在本实施方式中,多个所述第一凸起421均匀分布在所述第一传动轴42周向,多个所述第二凸起431均匀分布在所述第二传动轴43周向,所述第一转动轴和所述第二传动轴43均为齿轮轴,所述第一传动轴42与所述第二传动轴43传动连接处,所述第一传动轴42设有多个所述第一凸起421,所述第二传动轴43设有多个所述第二凸起431,所述第一凸起421与所述第二凸起431相互啮合,所述第一凸起421和所述第二凸起431的截面形状可以为渐开线齿形、圆弧齿形和楔形,以渐开线为优,保证所述第一传动轴42与所述第二传动轴43之间的传动稳定性。
进一步地,所述第二传动轴43具有连接套432,所述连接套432位于所述第二传动轴43靠近所述转盘41一端,所述第一传动轴42部分置于所述连接套432内,所述第二凸起431设于所述连接套432内侧壁。如图3和图4所示,在本实施方式中,所述第一传动轴42为外齿轮轴,所述第二传动轴43为内齿轮轴,所述连接套432内侧壁均匀分布多个所述第二凸起431,所述第一传动轴42部分装入所述连接套432,使得所述第一凸起421与所述第二凸起431啮合,即所述第一传动轴42与所述第二传动轴43内啮合,结构紧凑,所述第一凸起421与所述第二凸起431之间相对滑动速度小,使得所述第一传动轴42的转动能有效传递到所述第二传动轴43。在其他实施方式中,也可以 将所述第一传动轴42与所述第二传动轴43的连接方式设为外啮合,以达到基本相同的技术效果。
进一步地,所述调节机构40还包括固定座44,所述固定座44与所述转盘41固定连接,所述固定座44具有第二安装孔45,所述第一传动轴42远离所述第二传动轴43一端装入所述第二安装孔45。如图1、图5和图6所示,在本实施方式中,所述固定座44与所述转盘41通过螺栓连接,为了防止所述第一传动轴42远离所述第二传动轴43一端在转动时,由于伸出所述转盘41太多,产生较大绕度。所述固定座44上开设所述第二安装孔45,所述第一传动轴42远离所述第二传动轴43的一端端部装入所述第二安装孔45,所述第一传动轴42与所述第二安装孔45之间设置轴承,保证所述固定座44对所述第一传动轴42进行可靠支撑。
进一步地,所述带传动张紧装置100还包括壳体50,所述壳体50具有容纳腔,所述主动轮10和从动轮20,以及所述皮带30收容于所述容纳腔内。如图1所示,在本实施方式中,所述壳体50包括左壳和右壳,左壳与右壳通过螺栓连接。在带传动张紧装置100安装时,所述主动轮10、所述从动轮20和所述皮带30依次装入所述左壳或右壳,再盖合另一侧的右壳或左壳,使得所述主动轮10、所述从动轮20和所述皮带30收容于所述壳体50形成的所述容纳腔内,防止所述皮带30工作时,杂质进入所述皮带30与所述主动轮10、所述皮带30与所述从动轮20之间,加剧所述皮带30的磨损。
进一步地,所述壳体50具有安装台51,所述安装台51设于所述容纳腔内,并位于所述壳体50内侧壁,所述转盘41与所述安装台51适配,并可拆卸连接。所述转盘41开设有弧形槽412,所述转盘41转动到预设位置,螺栓穿过所述弧形槽412,固定于所述安装台51,使得所述转盘41与所述壳体50抵持固定。所述带传动张紧装置100还包括挡板60,所述挡板60固定连接于所述壳体50内侧壁,并与所述转盘41抵触。如图1、图5和图6所示,在本实施方式中,所述壳体50内侧壁下凹形成所述安装台51,所述安装台51为圆形,形状尺寸与所述转盘41相同,方便所述转盘41安装在所述壳体50上。所述转盘41上开设有所述弧形槽412,所述弧形槽412的数量为多个,沿所述转盘41的转动轴线均匀分布。所述转盘41旋转到预设位置,螺栓穿过所述 弧形槽412,使所述转盘41压紧在所述壳体50上,避免所述带传动张紧装置100在工作时,所述转盘41产生相对转动,进而导致所述皮带30松弛。需要说明地是,为了更好对所述转盘41进行固定,在所述转盘41外侧设置所述挡板60,所述挡板60为弯折板件,所述挡板60一端与所述壳体50螺栓连接,另一端与所述转盘41外缘抵触。
进一步地,所述从动轮20具有多个第三凸起21,所述第三凸起21均匀设置于所述从动轮20与所述皮带30接触周侧。在本实施方式中,所述从动轮20上均匀设置有多个第三凸起21,以增加所述从动轮20与所述皮带30之间的摩擦力,提高传动效率。在其他实施方式中,也可以在所述主动轮10上设置所述第三凸起21,已到达基本相同的技术效果。
以上对本发明实施例公开的一种带传动张紧装置进行了详细介绍,以上所揭露的仅为本发明较佳实施例而已,当然不能以此来限定本发明之权利范围,因此依本发明权利要求所作的等同变化,仍属本发明所涵盖的范围。

Claims (9)

  1. 一种带传动张紧装置,其特征在于,
    所述带传动张紧装置包括主动轮、从动轮、皮带和调节机构,所述主动轮与所述从动轮相对设置,所述皮带围合于所述主动轮和所述从动轮周缘,所述调节机构包括转盘、第一传动轴和第二传动轴,所述第二传动轴的中心轴线与所述转盘的转动轴线重合,所述转盘具有第一安装孔,所述第一安装孔的轴线到所述转盘的转动轴线偏置预设距离,所述第一传动轴的一端与所述从动轮固定连接,所述第一传动轴的另一端穿过所述第一安装孔,并与所述第二传动轴转动连接,所述从动轮随所述转盘转动,用以改变所述主动轮与所述从动轮之间的距离。
  2. 根据权利要求1所述的带传动张紧装置,其特征在于,
    所述第一传动轴远离所述从动轮的周向具有多个第一凸起,所述第二传动轴靠近所述转盘的周向具有多个第二凸起,所述第一凸起与所述第二凸起啮合。
  3. 根据权利要求2所述的带传动张紧装置,其特征在于,
    所述第二传动轴具有连接套,所述连接套位于所述第二传动轴靠近所述转盘的一端,所述第一传动轴部分置于所述连接套内,所述第二凸起设于所述连接套内侧壁。
  4. 根据权利要去1所述的带传动张紧装置,其特征在于,
    所述调节机构还包括固定座,所述固定座与所述转盘固定连接,所述固定座具有第二安装孔,所述第一传动轴远离所述第二传动轴的一端装入所述第二安装孔。
  5. 根据权利要求1所述的带传动张紧装置,其特征在于,
    所述带传动张紧装置还包括壳体,所述壳体具有容纳腔,所述主动轮和从动轮,以及所述皮带收容于所述容纳腔内。
  6. 根据权利要求5所述的带传动张紧装置,其特征在于,
    所述壳体具有安装台,所述安装台设于所述容纳腔内,并位于所述壳体内侧壁,所述转盘与所述安装台适配,并可拆卸连接。
  7. 根据权利要求6所述的带传动张紧装置,其特征在于,
    所述带传动张紧装置还包括挡板,所述挡板固定连接于所述壳体内侧壁,并与所述转盘抵触。
  8. 根据权利要求7所述的带传动张紧装置,其特征在于,
    所述转盘开设有弧形槽,所述转盘转动到预设位置,螺栓穿过所述弧形槽,固定于所述安装台,使得所述转盘与所述壳体抵持固定。
  9. 根据权利要求2所述的带传动张紧装置,其特征在于,
    所述从动轮具有多个第三凸起,所述第三凸起均匀设置于所述从动轮与所述皮带接触周侧。
PCT/CN2017/102897 2017-09-22 2017-09-22 带传动张紧装置 WO2019056290A1 (zh)

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CN104613141A (zh) * 2015-01-27 2015-05-13 中国石油天然气集团公司 一种带张紧的皮带传动装置
CN107606083A (zh) * 2017-09-22 2018-01-19 深圳市比思维科技有限公司 带传动张紧装置

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US3581853A (en) * 1969-04-21 1971-06-01 Hoffco Inc Two-speed motor-bike drive
US4222280A (en) * 1978-08-21 1980-09-16 Stewart Donald M Speed changing unit construction
US5540627A (en) * 1994-06-14 1996-07-30 Bando Chemical Industries, Ltd. Auto-tensioner
US5752892A (en) * 1995-05-16 1998-05-19 Kioritz Corporation Driving force transmission device and portable working machine using the same
CN104613141A (zh) * 2015-01-27 2015-05-13 中国石油天然气集团公司 一种带张紧的皮带传动装置
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