CN203868275U - Hydraulic stepless speed change transmission mechanism - Google Patents

Hydraulic stepless speed change transmission mechanism Download PDF

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Publication number
CN203868275U
CN203868275U CN 201420195199 CN201420195199U CN203868275U CN 203868275 U CN203868275 U CN 203868275U CN 201420195199 CN201420195199 CN 201420195199 CN 201420195199 U CN201420195199 U CN 201420195199U CN 203868275 U CN203868275 U CN 203868275U
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hydraulic
pump
connected
transmission mechanism
oil
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CN 201420195199
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Chinese (zh)
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孟凡堂
王建
王�华
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交城县华昌泰机械制造有限公司
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Abstract

The utility model discloses a transmission mechanism and particularly discloses a hydraulic stepless speed change transmission mechanism applicable to agricultural machines. The hydraulic stepless speed change transmission mechanism comprises an engine and a rear axle traveling mechanism and further comprises a variable pump and a hydraulic motor. An output shaft of the engine is connected with an input shaft of the variable pump, a high pressure cavity of the variable pump is communicated with an oil inlet of the hydraulic motor through a first oil way, a low pressure cavity of the variable pump is communicated with an oil outlet of the hydraulic motor through a second oil way, the variable pump and the hydraulic motor form a closed loop, an output shaft of the hydraulic motor is connected with an axle housing of the rear axle traveling mechanism, a gear joystick is installed on the variable pump, and the gear joystick is fixed to a swash plate of the variable pump. The hydraulic stepless speed change transmission mechanism is simple and reasonable in structure; original complex mechanical speed regulation is replaced by hydraulic speed regulation transmission, the jerking feel in the gear shifting process is avoided, a driver can drive more smoothly, stepless speed regulation can be achieved, and the hydraulic stepless speed change transmission mechanism is wide in speed regulation range, convenient to operate, simple in structural arrangement, high in practicality and capable of saving energy.

Description

一种液压无级变速传动机构 A hydraulic continuously variable transmission mechanism

技术领域 FIELD

[0001] 本实用新型涉及一种传动机构,具体涉及一种适用于农用机械的液压无级变速传动机构。 [0001] The present invention relates to a transmission mechanism, particularly suitable for agricultural machinery, to a hydraulic continuously variable transmission mechanism.

背景技术 Background technique

[0002] 变速器是汽车中一个非常重要的组成部分,通过变速器,可以实现汽车运动方向和速度的控制和变换。 [0002] The transmission is a very important part of the car, through a transmission, and control can be achieved converted moving direction and speed of the car. 目前农用机械上大多使用的变速器都是机械变速器。 Currently transmission on agricultural machinery are mostly used mechanical transmission. 机械变速器大都是有级变速器,在发动机转速一定时,有级变速器具有有限的几个定值传动比供选择,例如5个前进档和一个倒车档。 Mostly mechanical transmission stepped transmission, the engine speed is constant, a stepped transmission with a limited number of available gear ratio value, for example, five forward gears and one reverse gear. 采用机械变速器,换挡经常伴有顿挫感,汽车运行不够平顺, 并且机械变速器体积较大,机械传动,摩擦阻力大,耗油量增加,并且无法实现无级调速。 Mechanical transmission, shift often accompanied by a sense of frustration, cars not running smoothly, and bulky mechanical transmission, a mechanical transmission, a large frictional resistance, increased fuel consumption, and can not be stepless. 实用新型内容 SUMMARY

[0003] 本实用新型克服现有技术存在的不足,所要解决的技术问题是提供了一种结构简单、合理,采用发动机连接变量泵,变量泵驱动液压马达,从而驱动车辆行走的液压无级变速传动机构。 [0003] The present invention overcomes the shortcomings of the prior art, the technical problem to be solved is to provide a simple, rational, using variable pump connected to the engine, the variable hydraulic motor driving the pump, thus driving the hydraulic traveling vehicle continuously variable transmission transmission mechanism.

[0004] 为解决上述技术问题,本实用新型所采用的技术方案为:一种液压无级变速传动机构,包括:发动机和后桥行走机构,其特征在于:还包括变量泵和液压马达,所述发动机的输出轴与变量泵的输入轴相连接,所述变量泵的高压腔通过第一油路与液压马达的进油口相连通,变量泵的低压腔通过第二油路与液压马达的出油口相连通,所述变量泵和液压马达构成一个闭合回路,所述液压马达的输出轴与后桥行走机构的桥包相连接,所述变量泵上安装有档位控制杆,所述档位控制杆固定在变量泵的斜盘上。 [0004] To solve the above technical problem, the technical solution of the present invention is used: a hydraulic continuously variable transmission mechanism, comprising: an engine and the rear axle running gear, characterized by: further comprising a variable displacement pump and a hydraulic motor, the said output shaft with the input shaft of the variable pump connected to the engine, the variable displacement pump high pressure chamber via a first oil passage and the oil feed port communicating the hydraulic motor, a variable displacement pump via a second oil passage and the low pressure chamber of the hydraulic motor an oil outlet is connected via the variable displacement pump and the hydraulic motor form a closed loop, the output shaft of the bridge packet walking mechanism connected to the rear axle of the hydraulic motor, the variable shift lever is mounted on the pump, the the shift lever is fixed in the variable pump swash plate.

[0005] 优选地,所述变量泵为双向变量轴式柱塞泵。 [0005] Preferably, the pump is a variable variable bidirectional piston pump shaft.

[0006] 优选地,所述变量泵的输出端连接有补油泵,所述补油泵的进油口与油箱相连接, 补油泵的出油口通过第一单向阀分别与第一油路、第二油路相连通,低压溢流阀一端与补油泵的出油口相连通,另一端与油箱相连通。 [0006] Preferably, the variable pump connected to the output terminal of the charge pump, the charge pump oil inlet to the tank is connected to the charge pump through the oil port and the first check valve of the first oil passage, respectively, a second oil passage communicates, charge pump and low pressure relief valve at one end of the oil outlet in communication, and the other end communicating with the reservoir.

[0007] 优选地,所述闭合回路中还连接有高压安全阀,所述高压安全阀一端通过第二单向阀与第一油路、第二油路相连通,另一端与油箱相连通。 [0007] Preferably, the closed circuit is also connected with a pressure safety valve, one end of the high-pressure relief valve and the second check valve through the first passage, a second passage communicating the other end is communicated with the reservoir.

[0008] 本实用新型结构简单、合理,采用液压调速传动代替原有的复杂的机械调速,避免了换挡时的顿挫感,使驾驶更加平顺,同时本实用新型整体体积小,机构紧凑,功率大,损失小,效率高,速度稳定好,可实现无级调速,调速范围大,操作方便,结构布置简单且实用性强,节约能源。 [0008] The present invention is simple and reasonable structure, hydraulic variable speed drives instead of the original complex mechanical governor avoided when the shift feeling frustrated, make driving more smoothly, while the present invention a small overall size, compact structure , power, small loss and high efficiency, good speed and stability, can realize stepless speed range, easy to operate, practical and simple structural arrangement, energy conservation.

附图说明 BRIEF DESCRIPTION

[0009] 图1为本实用新型液压无级变速传动机构的结构示意图。 [0009] Fig 1 a schematic view of the structure of the present invention is a hydraulic continuously variable transmission mechanism.

[0010] 图2为本实用新型中液压油路的控制原理图。 [0010] FIG 2 is a control schematic of the hydraulic circuit of the new utility.

[0011] 图中:1为发动机,2为后桥行走机构,3为变量泵,4为液压马达,5为档位控制杆, 6为第一油路,7为第二油路,8为补油泵,9为邮箱,10为低压溢流阀,11为第一单向阀,12 为高压安全阀,13为第二单向阀。 [0011] FIG: 1 is the engine, 2 is a rear axle running gear, variable displacement pump 3, a hydraulic motor 4, 5 of shift control lever 6 is a first oil passage, a second passage 7, 8 charge pump, 9 is a mailbox, a low pressure relief valve 10, first check valve 11, high pressure relief valve 12, 13 is a second check valve.

具体实施方式 detailed description

[0012] 下面结合附图对本实用新型作的具体实施例作进一步说明。 [0012] The following drawings of specific embodiments of the present invention will be further described for the binding.

[0013] 如图1所示,一种液压无级变速传动机构,包括:发动机1和后桥行走机构2,其特征在于:还包括变量泵3和液压马达4,所述发动机1的输出轴与变量泵3的输入轴相连接, 所述变量泵3的高压腔通过第一油路6与液压马达4的进油口相连通,变量泵3的低压腔通过第二油路7与液压马达4的出油口相连通,所述变量泵3和液压马达4构成一个闭合回路,所述液压马达4的输出轴与后桥行走机构2的桥包相连接,所述变量泵3上安装有档位控制杆5,所述档位控制杆5固定在变量泵3的斜盘上。 [0013] As shown in FIG. 1, a hydraulic continuously variable transmission mechanism, comprising: an engine and the rear axle bogie 2, characterized in that the 1: 3 further comprises a variable displacement pump and the hydraulic motor 4, the engine output shaft 1 variable pump 3 is connected to the input shaft, the variable displacement pump a first high-pressure chamber 3 through the passage 6 and the hydraulic motor 4 is connected to the oil inlet through the variable low pressure chamber of the pump 3 through a second oil passage with the hydraulic motor 7 4, oil outlet communicated, the variable displacement pump 3 and the hydraulic motor 4 constitute a closed circuit, the hydraulic motor output shaft and the rear axle of the running gear axle 4 is connected to packet 2, 3 is mounted on the pump with a variable 5 shift lever, the shift lever 5 is fixed on the swash plate in the variable displacement pump 3.

[0014] 所述变量泵3为双向变量轴式柱塞泵。 [0014] The variable displacement pump 3 is a variable bidirectional piston pump shaft.

[0015] 所述变量泵3的输出端连接有补油泵8,所述补油泵8的进油口与油箱9相连接, 补油泵8的出油口通过第一单向阀11分别与第一油路6、第二油路7相连通,低压溢流阀10 -端与补油泵8的出油口相连通,另一端与油箱9相连通。 [0015] The output of the variable displacement pump 3 is connected to the charge pump 8, the complement oil inlet 9 of the tank 8 is connected to the oil pump, the charge pump 8 through the first port 11 with the first one-way valve 6 oil passage, the second oil passage 7 communicating, low pressure relief valve 10 - an end of the charge pump 8 is connected through the port, and the other end communicates with the reservoir 9.

[0016] 所述闭合回路中还连接有高压安全阀12,所述高压安全阀12-端通过第二单向阀13与第一油路6、第二油路7相连通,另一端与油箱9相连通。 [0016] The closed circuit is also connected to a high-pressure relief valve 12, the pressure safety valve 12- 13 side through the second check valve 6 and the first oil passage, the second oil passage 7 in communication, the other end of the tank 9 communicating.

[0017] 具体使用时,变量泵3为双向变量轴式柱塞泵,其一端的动力输入轴可以直接与动力源相连接,如发动机、电动机,同时也可以通过离合器或者齿轮变速箱与动力源相连, 另一端 When [0017] the specific use, bidirectional variable displacement pump 3 is a variable piston pump shaft, one end of the input shaft may be connected directly to a power source, such as an engine, electric motor, but also by a clutch or gearbox with a power source and the other end

[0018] 为辅助输出端,可以带动补油泵为整个闭式液压系统补油,提前使得整个油路充满油液,另外,补油泵不断从油箱中抽取经过冷却器的冷油液,促进油液的循环,降低闭式系统中油液的稳升。 [0018] The auxiliary output terminals, the charge pump can be driven by the entire hydraulic system is closed up the oil, so that the entire advance oil passage filled with fluid, in addition, the charge pump cold fluid continuously extracted from the tank through a cooler and promote oil cycle, closed system to reduce the oil stability liter. 液压马达4直接驱动后桥行走机构2进行动作。 Bridge traveling mechanism 2 is operated after the hydraulic motor 4 is directly driven. 变量泵3和液压马达4 作为整个液压系统的执行元件,是能量转换装置,变量泵3在发动机1的动力作用下做旋转运动,将输入的机械能转换成液压能,通过第一油路6和第二油路7与液压马达4相连接, 在相应液压油流量、压力的驱动作用下,液压马达做旋转运动,进而输出转速、转矩,将液压能重新再转换回机械能。 Variable pump 3 and hydraulic motor 4 functions as an actuator of the hydraulic system, energy conversion device 3 variable pump rotational movement under power of the engine 1, the input of mechanical energy into hydraulic energy, and the first oil passage 6 the second passage 7 is connected to the hydraulic motor 4, driven by respective hydraulic action of oil flow, pressure, rotational movement of the hydraulic motor, whereby the output rotational speed, torque, hydraulic energy re-converted back to mechanical energy. 在整个液压油路中,变量泵3的高压腔和低压腔分别与液压马达4的进油口和回油口相连接,通过配油盘和中心盖板的铸造油路直接连通,构成一个闭合回路。 The entire hydraulic circuit, the variable pump high pressure chamber and a low pressure chamber and the hydraulic motor 3, respectively, and return the oil inlet port 4 is connected, through the casting passage communicates directly with the oil pan cover and the center, to form a closed loop. 变量泵3的输入轴通过花键连接带动柱塞体旋转,各柱塞随柱塞体的旋转而作轴向往复直线运动,从而在配油盘上半环排出高压油,下半环吸入低压油充满工作腔;液压马达4 则利用高低压油液压差产生转矩,带动马达轴转动,输出动力。 Variable pump 3 is connected to the input drive shaft by spline piston body is rotated, with the rotation of each of the plungers of the plunger member and axially reciprocating linear motion, so that the half-rings in high-pressure oil discharged oil pan, the low-pressure suction half-ring oil-filled working chamber; the hydraulic motor 4 to generate a torque with a high pressure fluid low pressure, driven by rotation of the motor shaft, the output power.

[0019] 变量泵3上设置有档位控制杆5,档位控制杆5固定在变量泵3的斜盘上,档位控制杆5控制变量泵3斜盘的偏转角度和偏转方向,从而控制车辆的行驶速度和行驶方向。 [0019] 3 with a variable displacement pump is provided on the shift lever 5, the shift lever 5 is fixed on the variable pump swash plate 3, the shift lever 5 controls the variable displacement pump tilt angle and the direction of deflection of the swash plate 3, so as to control driving speed and driving direction of the vehicle. 当变量泵3的斜盘与泵轴处于垂直位置时,泵轴只带动补油泵工作,泵轴空转,泵不排油,这时收割机处于空挡位置:当变量泵3的斜盘与泵轴偏转一定角度时,泵开始排油,排量大小由变量泵斜盘偏转角度大小而定,角度越大排量则越大,泵油方向则取决于变量斜盘偏转的方向。 When the variable swash plate pump 3 and the pump shaft in a vertical position, the charge pump drive shaft only work, idle shaft, an oil pump not exclusively, when in the neutral position the harvester: When the variable pump swash plate of the pump shaft 3 the deflection angle, the drain pump starts, the size of the variable displacement pump swash plate tilt angle on the size, the larger the angle the greater the displacement, the pumping direction depends on the direction of deflection of the swashplate. 通过档位控制杆5改变变量泵3斜盘的角度和方向,控制马达的转速和转向,进而控制机器的行驶速度和行驶方向。 3 pump swash plate angle and direction of shift lever 5 by changing the variables controlling the rotation speed and the steering motor, thereby controlling the machine traveling speed and traveling direction.

[0020] 补油泵8是整个闭式液压系统的液压源,一般采用内齿轮泵,主要补充液体泄漏, 保证变量泵和液压马达组成的闭式油路系统具有一定的常压值,补油泵8的出口通过第一单向阀11向回路系统补油,通过低压溢流阀10来保证回油压力不变。 [0020] The charge pump 8 is a hydraulic pressure source throughout the closed hydraulic system, generally use an internal gear pump, supplementary liquid leakage primarily to ensure a closed hydraulic system and the hydraulic variable displacement pump motor consisting of a certain pressure value, the charge pump 8 the first check valve 11 through the outlet up to the oil circuit system, through low pressure relief valve 10 to ensure the return pressure constant. 补油时,油从油箱经补油泵、第一单向阀进入第一油路6和第二油路7,补油压力的大小由低压溢流阀10来调定。 When up the oil, the oil from the tank through the charge pump, the first check valve 6 into the first passage and the second passage 7, the magnitude of the charge pressure relief valve 10 to adjust the low pressure set. 同时闭合回路中还安装了高压安全阀12,用来为系统限定最高压力值,其大于该系统的一般工作压力;当系统工作压力大于该最高压力值时,高压安全溢流阀就会打开,使高压油路压力下降,避免出现系统压力过载的现象,从而防止过载导致的系统元件的损坏。 While closed circuit high pressure relief valve 12 is also installed, used to define the maximum value for the system pressure, which is greater than the normal working pressure of the system; when the maximum pressure value is greater than the system pressure, the high pressure safety relief valve will open, the high-pressure oil path pressure drop, to avoid overloading the system pressure phenomenon occurs, so as to prevent excessive damage to the system due to the carrier element.

[0021] 上面结合附图对本实用新型的实施例作了详细说明,但是本实用新型并不限于上述实施例,在本领域普通技术人员所具备的知识范围内,还可以在不脱离本实用新型宗旨的前提下作出得各种变化,也应视为本实用新型的保护范围。 [0021] The above been described in detail in conjunction with the accompanying drawings of the present embodiment of the invention, but the present invention is not limited to the above embodiments, one of ordinary skill in the art have the knowledge range, may also be present without departing from the invention various changes have to be made under the premise of purpose, it should also be considered within the scope of the present invention to protect.

Claims (4)

  1. 1. 一种液压无级变速传动机构,包括:发动机(1)和后桥行走机构(2),其特征在于:还包括变量泵(3)和液压马达(4),所述发动机(1)的输出轴与变量泵(3)的输入轴相连接,所述变量泵(3)的高压腔通过第一油路(6)与液压马达(4)的进油口相连通,变量泵(3)的低压腔通过第二油路(7)与液压马达(4)的出油口相连通,所述变量泵(3)和液压马达(4)构成一个闭合回路,所述液压马达(4)的输出轴与后桥行走机构(2)的桥包相连接,所述变量泵(3)上安装有档位控制杆(5),所述档位控制杆(5)固定在变量泵(3)的斜盘上。 1. A hydraulic continuously variable transmission mechanism, comprising: an engine (1) and the rear axle running gear (2), characterized by: further comprising a variable displacement pump (3) and a hydraulic motor (4), the engine (1) the output shaft of the variable displacement pump (3) is connected to an input shaft of the variable displacement pump (3) via a first oil passage in the high pressure chamber (6) and the hydraulic motor (4) connected through the oil inlet, the variable displacement pump (3 ) low pressure chamber through a second passage (7) the hydraulic motor (4) is connected through the oil outlet, the variable displacement pump (3) and a hydraulic motor (4) constitute a closed circuit, the hydraulic motor (4) bridge packet output shaft and rear axle running gear (2) is connected to the pump mounting variables (3) with a shift lever (5), said shift lever (5) is fixed (3 ) on the swash plate.
  2. 2. 根据权利要求1所述的一种液压无级变速传动机构,其特征在于:所述变量泵(3)为双向变量轴式柱塞泵。 2. A hydraulic continuously variable transmission mechanism according to claim 1, wherein: said variable displacement pump (3) is a bidirectional variable piston pump shaft.
  3. 3. 根据权利要求2所述的一种液压无级变速传动机构,其特征在于:所述变量泵(3)的输出端连接有补油泵(8),所述补油泵(8)的进油口与油箱(9)相连接,补油泵(8)的出油口通过第一单向阀(11)分别与第一油路(6)、第二油路(7)相连通,低压溢流阀(10) -端与补油泵(8)的出油口相连通,另一端与油箱(9)相连通。 3. A hydraulic continuously variable transmission mechanism according to claim 2, characterized in that: said variable displacement pump (3) connected to the output terminal of the charge pump (8), said charge pump (8) into the oil port with the tank (9) is connected to the charge pump (8) through the oil outlet of the first check valve (11) with the first passage (6), a second oil passage (7) communicating, low-pressure relief a valve (10) - end of the charge pump (8) connected through oil outlet, and the other end with the tank (9) communicates.
  4. 4. 根据权利要求1所述的一种液压无级变速传动机构,其特征在于:所述闭合回路中还连接有高压安全阀(12),所述高压安全阀(12)-端通过第二单向阀(13)与第一油路(6)、第二油路(7)相连通,另一端与油箱(9)相连通。 4. A hydraulic continuously variable transmission mechanism according to claim 1, wherein: said closed circuit is also connected to a high-pressure relief valve (12), the high-pressure relief valve (12) - the second end a check valve (13) with a first passage (6), a second oil passage (7) communicating, with the other end of the tank (9) communicates.
CN 201420195199 2014-04-22 2014-04-22 Hydraulic stepless speed change transmission mechanism CN203868275U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899724A (en) * 2014-04-22 2014-07-02 交城县华昌泰机械制造有限公司 Hydraulic stepless speed-change transmission mechanism
CN104930154A (en) * 2015-07-16 2015-09-23 河海大学常州校区 Hydraulic coupler
CN104976302A (en) * 2015-07-16 2015-10-14 河海大学常州校区 Hydraulic coupler
CN104976301A (en) * 2015-07-16 2015-10-14 河海大学常州校区 Hydraulic coupler
CN105065607A (en) * 2015-07-16 2015-11-18 河海大学常州校区 Hydraulic coupler
CN105065608A (en) * 2015-07-16 2015-11-18 河海大学常州校区 Hydraulic coupler
CN105065611A (en) * 2015-07-16 2015-11-18 河海大学常州校区 Hydraulic coupler
CN105179514A (en) * 2015-07-16 2015-12-23 河海大学常州校区 Hydraulic coupler
CN105416050A (en) * 2015-11-28 2016-03-23 贵州航天特种车有限责任公司 Chassis hydraulic drive system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899724A (en) * 2014-04-22 2014-07-02 交城县华昌泰机械制造有限公司 Hydraulic stepless speed-change transmission mechanism
CN104930154A (en) * 2015-07-16 2015-09-23 河海大学常州校区 Hydraulic coupler
CN104976302A (en) * 2015-07-16 2015-10-14 河海大学常州校区 Hydraulic coupler
CN104976301A (en) * 2015-07-16 2015-10-14 河海大学常州校区 Hydraulic coupler
CN105065607A (en) * 2015-07-16 2015-11-18 河海大学常州校区 Hydraulic coupler
CN105065608A (en) * 2015-07-16 2015-11-18 河海大学常州校区 Hydraulic coupler
CN105065611A (en) * 2015-07-16 2015-11-18 河海大学常州校区 Hydraulic coupler
CN105179514A (en) * 2015-07-16 2015-12-23 河海大学常州校区 Hydraulic coupler
CN105416050A (en) * 2015-11-28 2016-03-23 贵州航天特种车有限责任公司 Chassis hydraulic drive system
CN105416050B (en) * 2015-11-28 2018-07-24 贵州航天特种车有限责任公司 Kind of hydraulic driving system

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