WO2017045478A1 - 一种冷却液套及其固定装置以及电机 - Google Patents

一种冷却液套及其固定装置以及电机 Download PDF

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Publication number
WO2017045478A1
WO2017045478A1 PCT/CN2016/090648 CN2016090648W WO2017045478A1 WO 2017045478 A1 WO2017045478 A1 WO 2017045478A1 CN 2016090648 W CN2016090648 W CN 2016090648W WO 2017045478 A1 WO2017045478 A1 WO 2017045478A1
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Prior art keywords
coolant jacket
fixing device
casing
pressing piece
housing
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PCT/CN2016/090648
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English (en)
French (fr)
Inventor
方善国
瓦根布莱特马库斯
吴振华
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舍弗勒技术股份两合公司
方善国
瓦根布莱特马库斯
吴振华
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Application filed by 舍弗勒技术股份两合公司, 方善国, 瓦根布莱特马库斯, 吴振华 filed Critical 舍弗勒技术股份两合公司
Priority to DE112016004144.6T priority Critical patent/DE112016004144T5/de
Priority to US15/759,724 priority patent/US10468939B2/en
Publication of WO2017045478A1 publication Critical patent/WO2017045478A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets

Definitions

  • the present invention relates to a coolant jacket and its fixture, and to a motor in which such a coolant jacket is mounted.
  • the electric drive component is one of the core power components of an electric car or a hybrid car. Since the working principle of the electric motor is different from that of the internal combustion engine, the high temperature may cause the motor to malfunction and affect the normal operation.
  • the electric drive component with the electric motor as the power source needs to be set for the electric motor. Cooling system for heat dissipation, and the most common is liquid cooling system, that is, by providing a coolant jacket outside the motor, the coolant can flow through the parts that need heat dissipation, thereby reducing the temperature of the electric drive assembly and ensuring that the motor is at a reasonable operating temperature. range.
  • FIG. 1b The prior art is shown in FIG. 1b. Because of the need for mounting and positioning, the coolant jacket outside the motor needs to be provided with a plurality of ear portions for bolt fixing at one end of the axial direction. In order to machine the ear portion at the end of the coolant jacket, it is necessary to use a ring blank having a large wall thickness, the wall thickness of which needs to be larger than the radial dimension of the ear portion, as shown in Fig. 1a.
  • the problem solved by the invention is that the production method of the motor coolant jacket is too complicated, the material cost and the process cost are high, and the service life is not ideal.
  • the present invention provides a coolant jacket fixing device for fixing a cylindrical coolant jacket to a radially inner portion of a casing, comprising: for fixing the coolant jacket and the a bolt of the housing, an axial mounting hole for mounting the bolt on an axial side of the housing, a groove provided on an axial side of the coolant jacket, and a shape matching the recess a tableting of the groove, the number of the pressing sheets being the same as the groove, the radially inner portion of the pressing piece being pressed against the groove, and being fixed to the casing by the bolt and the mounting hole Thereby, the coolant jacket is fixed inside the radial direction of the casing.
  • the radially outer side of the tablet is pressed against the housing by a circumferentially extending cylindrical structure, the sheet being in line contact with the cylindrical structure.
  • the cylindrical structure is a cylindrical structure.
  • the housing is provided with a recess matching the shape of the cylindrical structure, the cylindrical structure is embedded in the recess and partially exposed outside the recess to be in line contact with the tablet.
  • the cylindrical structure is embedded in the recess to make surface contact with the recess.
  • the present invention provides a coolant jacket fixed to the casing by the above-described coolant jacket fixing device and a motor for electrically driving the vehicle having such a coolant jacket.
  • the present invention has the advantage that the structure of the coolant jacket is simplified due to the separate fixing device, so that the production process and steps are simplified, and the materials and costs are also reduced.
  • the various components in the fixed structure are line contact or surface contact, and the increased contact area makes the stress concentration situation avoided, so the precision of the process is further reduced, and the probability of damage is reduced, and the service life is prolonged. .
  • 1a-1b are schematic views showing the production process of a motor coolant jacket in the prior art
  • FIG. 2 is a schematic view showing a state in which a motor coolant jacket is mounted on a casing in the prior art
  • FIG. 3 is a schematic structural view of a motor coolant jacket of the present invention.
  • FIG. 4 is a schematic view showing a state in which a motor coolant jacket of the present invention is mounted on a casing;
  • Figure 5 is a partial enlarged view of the fixing device of the motor coolant jacket of Figure 4 mounted on the housing.
  • the fixing device of the motor coolant jacket 1 of the present invention comprises a plurality of grooves 3 provided on one axial side of the coolant jacket 1, that is, on the mounting end side, the grooves 3 being used for The coolant jacket 1 is fixed to the radially inner side of the casing 2 in a rotationally fixed manner. As shown in FIG. 3, the fixing device of the motor coolant jacket 1 of the present invention comprises a plurality of grooves 3 provided on one axial side of the coolant jacket 1, that is, on the mounting end side, the grooves 3 being used for The coolant jacket 1 is fixed to the radially inner side of the casing 2 in a rotationally fixed manner. As shown in FIG.
  • the fixing device further comprises a pressing piece 5 which cooperates with the groove 3 on the coolant sleeve, and the pressing piece 5 is fixed on the casing 2 by bolts 6, the number and the The grooves 3 are identical and the shapes are also matched, and the pressing piece 5 axially fixes the coolant jacket 1 on the radially inner side of the casing, and at the same time, the groove 3 can be fitted in the circumferential direction.
  • the coolant jacket is given a fix to prevent it from rotating relative to the housing.
  • the pressing piece 5 is fixed to the casing 2 by bolts 6.
  • the fixing device further comprises a bolt 6 for fixing the pressing piece 5, a mounting hole provided on the housing 2 for mounting the bolt 6, and each of the pressing sheets 5 is arranged in two circumferential directions.
  • the bolt 6 is fixed to the housing 2.
  • the fixing device further includes a cylindrical structure 7 disposed between the pressing piece 5 and the casing 2 on the radially outer side of the pressing piece 5, the cylindrical structure 7 is also arranged in the circumferential direction, the radially inner portion of the pressing piece 5 is engaged with the groove 3 of the coolant jacket 1, and the radially outer portion is pressed against the cylindrical structure 7.
  • the housing 2 is further provided with a circumferential recess 8 matching the cylindrical structure 7, the axial depth of which is about half of the diameter of the cross-section of the cylindrical structure, and a portion of the cylindrical structure 7 is embedded in the recess 8 In the middle, there is a part that protrudes outward.
  • the radially inner and outer edges of the pressure piece 5 are respectively pressed against the groove 3 in the coolant jacket and the cylindrical structure 7, during the process of the bolt 6 being gradually tightened, the pressure The radially inner edge of the sheet 5 is gradually subjected to axial pressure to hold the coolant jacket.
  • the pressing piece 5 does not come into contact with the coolant jacket 1 and the casing 2, but is in line contact with the radial inner and outer edges respectively, the geometrical process requirements are greatly reduced. There is no looseness due to the problem of mating with the contact surface of the casing 2, which affects the fixing effect.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

一种冷却液套及其固定装置以及电机，固定装置用于将圆柱形的冷却液套固定在壳体的径向内部，包括用于固定所述冷却液套和所述壳体的螺栓，设置在所述壳体轴向侧的用于安装所述螺栓的轴向的安装孔，还包括设置在所述冷却液套轴向侧的凹槽，以及形状配合所述凹槽的压片，所述压片数量与所述凹槽相同，所述压片的径向内侧部分压靠在所述凹槽中，并通过所述螺栓固定在壳体上，以此固定在所述壳体的径向内部。分离式的固定装置简化冷却液套的结构，及其生产工艺和步骤，材料和成本也随之下降，而各个部件都是线接触或面接触，使得应力集中的情况被避免，降低了损坏的概率，延长了使用寿命。

Description

一种冷却液套及其固定装置以及电机
本申请要求于2015年9月14日提交中国专利局、申请号为201510583975.6、发明名称为“一种冷却液套及其固定装置以及电机”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中。
技术领域
本发明涉及一种冷却液套及其固定装置，以及安装了这种冷却液套的电机。
背景技术
电力驱动组件是电动汽车或者混合动力汽车的核心动力组件之一，由于电动机的工作原理与内燃机不同，高温会导致电动机故障从而影响正常工作，以电动机作为动力源的电力驱动组件需要设置用于电动机散热的冷却系统，而最常见的是液冷系统，即，通过在电动机外部设置冷却液套使冷却液可以流经需要散热的部位，从而实现电力驱动组件的降温，保证电动机处于合理的工作温度范围。
现有技术如图1b所示，因为安装定位的需要，电动机外部的冷却液套在轴向一端需要设置多个用于螺栓固定的耳状部。为了在冷却液套的端部加工出耳状部，需要采用原本壁厚较大的圆环坯，其壁厚需要大于耳状部的径向尺寸，如图1a所示。但为了仅在一端加工出耳状部，圆环坯上绝大部分材料会在机加工过程中被除去，以达到符合要求的冷却液套壁厚，因此原材料的浪费程度较高，并且，由于大面积的机加工，对于加工的工艺控制要求也较高，加工程序也复杂，从而使得加工成本进一步增加。
同时，如图2所示，由于冷却液套直接采用螺栓固定在壳体上，其与壳体的接触面上很容易由于匹配度不够而产生应力集中的点，从而长期来看容易造成接触位置的磨损和部件的损坏。
因此，需要提供一种具有改进的更为简洁的生产方法来生产电动 机冷却液套以解决上述问题。
发明内容
本发明解决的问题是电动机冷却液套的生产方法过于复杂，材料成本和工艺成本较高，同时使用寿命不够理想。
为解决上述问题，本发明提供了一种冷却液套固定装置，用于将圆柱形的所述冷却液套固定在壳体的径向内部，包括：用于固定所述冷却液套和所述壳体的螺栓，设置在所述壳体轴向侧的用于安装所述螺栓的轴向的安装孔，还包括设置在所述冷却液套轴向侧的凹槽，以及形状配合所述凹槽的压片，所述压片数量与所述凹槽相同，所述压片的径向内侧部分压靠在所述凹槽中，并通过所述螺栓和安装孔固定在所述壳体上，以此将所述冷却液套固定在所述壳体的径向内部。
优选地，所述压片的径向外侧借助周向延伸的柱形结构压靠在所述壳体上，所述压片与所述柱形结构之间为线接触。
优选地，所述柱形结构为圆柱形结构。
优选地，所述壳体上设置有与所述柱形结构形状匹配的凹口，所述柱形结构嵌入所述凹口中并有部分露在凹口外与所述压片线接触。
优选地，所述柱形结构嵌入到所述凹口中，与所述凹口形成面接触。
此外，本发明还提供一种采用上述的冷却液套固定装置固定在壳体上的冷却液套以及具有这种冷却液套的用于电驱动车辆的电机。
与现有技术相比，本发明具有以下优点：因为分离式的固定装置，冷却液套的结构被简化，从而生产工艺和步骤得到简化，材料和成本也随之下降。而固定结构中的各个部件都是线接触或面接触，增加的接触面积使得应力集中的情况被避免，所以工艺上的精准度要求被进一步降低，也同时降低了损坏的概率，延长了使用寿命。
附图说明
图1a-1b是现有技术中电动机冷却液套的生产过程示意图；
图2是现有技术中电动机冷却液套安装在壳体上的状态示意图；
图3是本发明的电动机冷却液套结构示意图；
图4是本发明的电动机冷却液套安装在壳体上的状态示意图；
图5是图4中电动机冷却液套安装在壳体上的固定装置的局部放大图。
具体实施方式
如图3所示，本发明的电动机冷却液套1的固定装置包括在所述冷却液套1的轴向一端侧面，即安装端侧上设置的若干凹槽3，所述凹槽3用于将所述冷却液套1抗相对转动地固定在壳体2的径向内侧。如图4所示，所述固定装置还包括与所述冷却液套上的凹槽3配合的压片5，所述压片5通过螺栓6固定在所述壳体2上，数量与所述凹槽3相同，形状也匹配，所述压片5在轴向上将所述冷却液套1固定在所述壳体的径向内侧，同时由于所述凹槽3的配合在周向上也能给予所述冷却液套以固定，避免其与所述壳体产生相对转动。所述压片5通过螺栓6固定在所述壳体2上。
所述固定装置还包括用于固定所述压片5的螺栓6，设置在所示壳体2上用于安装所述螺栓6的安装孔，每个压片5上采用两个周向排列的螺栓6与所述壳体2固定。
此外，如图5所示，所述固定装置还包括设置在所述压片5的径向外侧、所述压片5和所述壳体2之间的圆柱形结构7，所述圆柱形结构7也在圆周方向上设置，所述压片5的径向内侧部分与所述冷却液套1的凹槽3配合，径向外侧部分压靠在所述圆柱形结构7上。所 述壳体2上还设置有与所述圆柱形结构7匹配的周向凹口8，其轴向深度约为所述圆柱形结构截面直径的一半，所述圆柱形结构7一部分嵌入所述凹口8中，还有一部分向外凸出。
所述压片5的径向内外沿分别压靠在所述冷却液套中的凹槽3中和所述圆柱形结构7上，在所述螺栓6被逐渐旋紧的过程中，所述压片5的径向内沿被逐渐产生轴向压力，固定住所述冷却液套。而所述压片5由于并不与所述冷却液套1和壳体2发生接触，而是在径向内外沿分别与二者发生线接触，所以其在几何形状上的工艺要求被大大降低，不会因为与所述壳体2的接触面配合问题而产生松动，影响固定效果。并且，压片5对于所述壳体2的压力通过与所述圆柱形结构7的线接触，以及所述圆柱形结构7与所述壳体2的面接触逐步分散到所述壳体2上，不会在壳体2上产生局部的应力集中，从而进一步降低了壳体2由于应力而损坏的可能性。
虽然本发明仅就某些示范性实施方式进行描述，这些描述应该仅作为示例而不构成限制。在所附权利要求书记载的范围内，在不脱离本发明精神和范围情况下，各种变化均是可能的。

Claims (7)

  1. 一种冷却液套固定装置，用于将圆柱形的所述冷却液套(1)固定在壳体(2)的径向内部，包括：用于固定所述冷却液套(1)和所述壳体(2)的螺栓(6)，设置在所述壳体(2)轴向侧的用于安装所述螺栓(6)的轴向的安装孔，其特征在于，还包括设置在所述冷却液套(1)轴向侧的凹槽(3)，以及形状配合所述凹槽(3)的压片(5)，所述压片(5)数量与所述凹槽(3)相同，所述压片(5)的径向内侧部分压靠在所述凹槽(3)中，并通过所述螺栓(6)和安装孔固定在所述壳体(2)上，以此将所述冷却液套(1)固定在所述壳体(2)的径向内部。
  2. 如权利要求1所述的冷却液套固定装置，其特征在于：所述压片(5)的径向外侧借助周向延伸的柱形结构(7)压靠在所述壳体上，所述压片(5)与所述柱形结构之间为线接触。
  3. 如权利要求2所述的冷却液套固定装置，其特征在于：所述柱形结构(7)为圆柱形结构。
  4. 如权利要求2或3所述的冷却液套固定装置，其特征在于：所述壳体(2)上设置有与所述柱形结构(7)形状匹配的凹口(8)，所述柱形结构(7)嵌入所述凹口(8)中并有部分露在凹口(8)外与所述压片(5)线接触。
  5. 如权利要求4所述的冷却液套固定装置，其特征在于：所述柱形结构(7)嵌入到所述凹口(8)中，与所述凹口(8)形 成面接触。
  6. 一种冷却液套，其特征在于：所述冷却液套(1)采用如权利要求1至5任一所述的冷却液套固定装置固定在壳体(2)上。
  7. 一种用于电驱动车辆的电机，其特征在于：所述电机设置在如权利要求6所述的冷却液套(1)的径向内部。
PCT/CN2016/090648 2015-09-14 2016-07-20 一种冷却液套及其固定装置以及电机 WO2017045478A1 (zh)

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DE112016004144.6T DE112016004144T5 (de) 2015-09-14 2016-07-20 Kühlflüssigkeitshülse und deren Befestigungsvorrichtung sowie elektrische Maschine
US15/759,724 US10468939B2 (en) 2015-09-14 2016-07-20 Coolant sleeve and fixing device thereof and electric machine

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CN201510583975.6A CN106533060B (zh) 2015-09-14 2015-09-14 一种冷却液套及其固定装置以及电机

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CN106533060A (zh) 2017-03-22

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