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CN108869240A - Electric vacuum pump and its method of press-fitting with annular knurl mandrel - Google Patents

Electric vacuum pump and its method of press-fitting with annular knurl mandrel Download PDF

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Publication number
CN108869240A
CN108869240A CN201810708676.4A CN201810708676A CN108869240A CN 108869240 A CN108869240 A CN 108869240A CN 201810708676 A CN201810708676 A CN 201810708676A CN 108869240 A CN108869240 A CN 108869240A
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CN
China
Prior art keywords
mandrel
motor
press
vacuum pump
electric vacuum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810708676.4A
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Chinese (zh)
Inventor
熊伟
马闯
李振
葛宏
朱晓东
虞江
李哲
罗劲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Automotive Brake Systems Co Ltd
Original Assignee
Shanghai Automotive Brake Systems Co Ltd
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Priority to CN201810708676.4A priority Critical patent/CN108869240A/en
Publication of CN108869240A publication Critical patent/CN108869240A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
    • B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0083—Pulsation and noise damping means using blow off silencers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/043—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms two or more plate-like pumping flexible members in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/047—Pumps having electric drive

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

本发明涉及汽车制动系统技术领域，具体地说是一种具有滚花芯轴的电动真空泵及其压入方法。一种具有滚花芯轴的电动真空泵，包括缸盖、壳体、电机，其特征在于：壳体的上下两端分别连接缸盖，上下两端的缸盖的内端连接膜片的一端，膜片的另一端采用连杆连接偏心块；壳体的一侧设有电机，电机的芯轴分别轴接两个偏心块的偏心孔；所述的电机的芯轴为滚花齿结构。现有技术相比，提供一种具有滚花芯轴的电动真空泵及其压入方法，利用滚花的电机芯轴压入偏心块，以及偏心块及电机芯轴为粉末冶金工艺制得，可以保证电机芯轴与偏心块能够牢固连接；并且配合特定的压装工艺，提高了电动真空泵的整体品质，延长使用寿命。

The invention relates to the technical field of automobile brake systems, in particular to an electric vacuum pump with a knurled mandrel and a pressing method thereof. An electric vacuum pump with a knurled mandrel, including a cylinder head, a casing, and a motor, characterized in that: the upper and lower ends of the casing are respectively connected to the cylinder head, and the inner ends of the upper and lower ends of the cylinder head are connected to one end of a diaphragm, and the diaphragm The other end of the plate is connected to the eccentric block by a connecting rod; a motor is provided on one side of the housing, and the mandrel of the motor is respectively connected to the eccentric holes of the two eccentric blocks; the mandrel of the motor is a knurled tooth structure. Compared with the prior art, an electric vacuum pump with a knurled mandrel and a pressing method thereof are provided. The eccentric block is pressed into the eccentric block by using the knurled motor mandrel, and the eccentric block and the motor mandrel are made by powder metallurgy process, which can Ensure that the motor mandrel and the eccentric block can be firmly connected; and cooperate with the specific press-fitting process to improve the overall quality of the electric vacuum pump and prolong the service life.

Description

具有滚花芯轴的电动真空泵及其压入方法Electric vacuum pump with knurled mandrel and pressing method thereof

技术领域technical field

本发明涉及汽车制动系统技术领域，具体地说是一种具有滚花芯轴的电动真空泵及其压入方法。The invention relates to the technical field of automobile brake systems, in particular to an electric vacuum pump with a knurled mandrel and a pressing method thereof.

背景技术Background technique

电动真空泵应用于新能源车，利用电能为真空助力器抽取真空，是一种成熟稳定、经济的制动助力解决方案。膜片式电动真空泵具有抽气效率高，寿命长等特点，但电机输出芯轴与偏心块连接方式非常关键，由于转动过程中受到拉力，容易造成偏心块脱落，因此，提供一种芯轴滚花设计，压入粉末冶金材料的偏心块确保牢固连接，显得尤为重要。Electric vacuum pumps are used in new energy vehicles, and use electric energy to pump vacuum for vacuum boosters. It is a mature, stable and economical brake boosting solution. Diaphragm electric vacuum pumps have the characteristics of high pumping efficiency and long life, but the connection between the output mandrel of the motor and the eccentric block is very critical. Due to the tension during the rotation process, the eccentric block is likely to fall off. Therefore, a mandrel roller is provided. The flower design, the eccentric block pressed into the powder metallurgy material to ensure a firm connection, is particularly important.

发明内容Contents of the invention

本发明为克服现有技术的不足，提供一种具有滚花芯轴的电动真空泵及其压入方法。In order to overcome the deficiencies of the prior art, the invention provides an electric vacuum pump with a knurled mandrel and a pressing method thereof.

为实现上述目的，设计一种具有滚花芯轴的电动真空泵，包括缸盖、壳体、电机，其特征在于：壳体的上下两端分别连接缸盖，上下两端的缸盖的内端连接膜片的一端，膜片的另一端采用连杆连接偏心块；壳体的一侧设有电机，电机的芯轴分别轴接两个偏心块的偏心孔；所述的电机的芯轴为滚花齿结构。In order to achieve the above purpose, an electric vacuum pump with a knurled mandrel is designed, including a cylinder head, a housing, and a motor. It is characterized in that: the upper and lower ends of the housing are respectively connected to the cylinder head, and the inner ends of the upper and lower ends of the cylinder One end of the diaphragm and the other end of the diaphragm are connected to the eccentric block by a connecting rod; a motor is provided on one side of the housing, and the mandrel of the motor is respectively connected to the eccentric holes of the two eccentric blocks; the mandrel of the motor is a roller flower tooth structure.

工作时，电机的芯轴带动两个圆形的偏心块转动，通过偏心运动拉动两个连杆，两个气缸同时抽气或排气。When working, the mandrel of the motor drives two circular eccentric blocks to rotate, and pulls the two connecting rods through the eccentric movement, and the two cylinders suck or exhaust at the same time.

所述的壳体的另一侧设有消音器。The other side of the housing is provided with a muffler.

所述的壳体与上下两端的缸盖及膜片形成真空腔室，位于真空腔室的前侧位置连接真空接口。The housing, the cylinder head and the diaphragm at the upper and lower ends form a vacuum chamber, and the front side of the vacuum chamber is connected to a vacuum port.

所述的偏心块为粉末冶金工艺制得。The eccentric block is made by powder metallurgy process.

具体方法如下：The specific method is as follows:

（1）将电机及两块偏心块放置于压机的指定位置，压机根据指定的压入力值及下压行程，进行一次压入工作，压入的行程不大于30mm，压入的力值不大于11000N；(1) Place the motor and two eccentric blocks on the designated position of the press, and the press will perform a press-in operation according to the specified press-in force value and down-press stroke. Not more than 11000N;

（2）压机根据力传感器及位移传感器给出的数据进行判断压入的行程及压入力值是否合格，不合格则报警；(2) According to the data given by the force sensor and the displacement sensor, the press judges whether the pressing stroke and the pressing force value are qualified, and if it is not qualified, it will alarm;

（3）压入第一块偏心块的力值为F1，压入第二块偏心块的力值为F2，其中，F1及F2-F1的力值分别都大于800N，判断为合格，不合格则报警；(3) The force value of pressing the first eccentric block is F1, and the force value of pressing the second eccentric block is F2. Among them, the force values of F1 and F2-F1 are both greater than 800N, and it is judged as qualified or unqualified then call the police;

（4）压入合格后，取出工件，继续下一道工序。(4) After the press-in is qualified, take out the workpiece and continue to the next process.

所述的压机包括机架、压装气缸、力传感器、导向轴、电机放置座，机架的顶部设有压装气缸，压装气缸的伸出轴贯穿机架的顶部连接上传感器连接板的上端，上传感器连接板的下端连接力传感器的一端，力传感器的另一端连接下传感器连接板的上端，下传感器连接板的下端连接导向轴的一端，导向轴的另一端连接导向销；位于导向销的正下方设有电机放置座，所述的电机放置座位于机架的前侧，电机放置座的上端设有电机导向轴。The press includes a frame, a press-fit cylinder, a force sensor, a guide shaft, and a motor placement seat. The top of the frame is provided with a press-fit cylinder, and the extension shaft of the press-fit cylinder runs through the top of the frame to connect to the sensor connection plate. The upper end of the upper sensor connecting plate is connected to one end of the force sensor, the other end of the force sensor is connected to the upper end of the lower sensor connecting plate, the lower end of the lower sensor connecting plate is connected to one end of the guide shaft, and the other end of the guide shaft is connected to the guide pin; Directly below the guide pin is provided with a motor placement seat, the motor placement seat is located at the front side of the frame, and the motor guide shaft is provided at the upper end of the motor placement seat.

所述的压装气缸上设有位移传感器。The press-fit cylinder is provided with a displacement sensor.

所述的上传感器连接板与下传感器连接板之间采用连接柱连接，所述的连接柱分别位于上传感器连接板与下传感器连接板之间的四周位置。The upper sensor connecting plate and the lower sensor connecting plate are connected by connecting columns, and the connecting columns are respectively located in the surrounding positions between the upper sensor connecting plate and the lower sensor connecting plate.

位于压装气缸的伸出轴左右两侧设有导向杆，导向杆的一端位于机架的上部，导向杆的另一端贯穿机架与上传感器连接板连接。There are guide rods on the left and right sides of the extension shaft of the press-fit cylinder, one end of the guide rod is located on the top of the frame, and the other end of the guide rod runs through the frame and is connected with the upper sensor connecting plate.

本发明同现有技术相比，提供一种具有滚花芯轴的电动真空泵及其压入方法，利用滚花的电机芯轴压入偏心块，以及偏心块及电机芯轴为粉末冶金工艺制得，可以保证电机芯轴与偏心块能够牢固连接；并且配合特定的压装工艺，提高了电动真空泵的整体品质，延长使用寿命。Compared with the prior art, the present invention provides an electric vacuum pump with a knurled mandrel and a press-in method thereof. The knurled motor mandrel is used to press into the eccentric block, and the eccentric block and the motor mandrel are made by powder metallurgy process. It can ensure that the motor mandrel and the eccentric block can be firmly connected; and cooperate with the specific press-fitting process to improve the overall quality of the electric vacuum pump and prolong the service life.

附图说明Description of drawings

图1为本发明结构示意图。Fig. 1 is a schematic diagram of the structure of the present invention.

图2为本发明结构剖视图。Fig. 2 is a cross-sectional view of the structure of the present invention.

图3为电机的芯轴结构示意图。Fig. 3 is a schematic diagram of the structure of the mandrel of the motor.

图4为压机结构示意图。Figure 4 is a schematic diagram of the structure of the press.

参见图1，图2，1为缸盖，2为电机，3为真空接口，4为壳体，5为膜片，6为连杆，7为消音器，8为偏心块。Referring to Fig. 1 and Fig. 2, 1 is the cylinder head, 2 is the motor, 3 is the vacuum interface, 4 is the housing, 5 is the diaphragm, 6 is the connecting rod, 7 is the muffler, and 8 is the eccentric block.

参见图4，11为压装气缸，12为导向杆，13为上传感器连接板，14为下传感器连接板，15为机架，16为电机放置座，17为电机导向轴，18为导向销，19为导向轴，20为连接柱，21为力传感器。See Figure 4, 11 is the press-fit cylinder, 12 is the guide rod, 13 is the upper sensor connecting plate, 14 is the lower sensor connecting plate, 15 is the frame, 16 is the motor seat, 17 is the motor guide shaft, and 18 is the guide pin , 19 is a guide shaft, 20 is a connecting column, and 21 is a force sensor.

具体实施方式Detailed ways

下面根据附图对本发明做进一步的说明。The present invention will be further described below according to the accompanying drawings.

如图1至图3所示，壳体4的上下两端分别连接缸盖1，上下两端的缸盖1的内端连接膜片5的一端，膜片5的另一端采用连杆6连接偏心块8；壳体4的一侧设有电机2，电机2的芯轴分别轴接两个偏心块8的偏心孔；所述的电机2的芯轴为滚花齿结构。As shown in Figures 1 to 3, the upper and lower ends of the housing 4 are respectively connected to the cylinder head 1, and the inner ends of the upper and lower ends of the cylinder head 1 are connected to one end of the diaphragm 5, and the other end of the diaphragm 5 is connected to the eccentric by a connecting rod 6. block 8; one side of the housing 4 is provided with a motor 2, and the mandrel of the motor 2 is connected to the eccentric holes of the two eccentric blocks 8 respectively; the mandrel of the motor 2 is a knurled tooth structure.

壳体4的另一侧设有消音器7。The other side of the housing 4 is provided with a muffler 7 .

壳体4与上下两端的缸盖1及膜片5形成真空腔室，位于真空腔室的前侧位置连接真空接口3。The housing 4 forms a vacuum chamber with the cylinder head 1 and the diaphragm 5 at the upper and lower ends, and is located at the front side of the vacuum chamber to connect with the vacuum port 3 .

偏心块8为粉末冶金工艺制得。Eccentric block 8 is made by powder metallurgy process.

一种具有滚花芯轴的电动真空泵的压入方法，具体方法如下：A pressing method of an electric vacuum pump with a knurled mandrel, the specific method is as follows:

（1）将电机及两块偏心块放置于压机的指定位置，压机根据指定的压入力值及下压行程，进行一次压入工作，压入的行程不大于30mm，压入的力值不大于11000N；(1) Place the motor and two eccentric blocks on the designated position of the press, and the press will perform a press-in operation according to the specified press-in force value and down-press stroke. Not more than 11000N;

（2）压机根据力传感器及位移传感器给出的数据进行判断压入的行程及压入力值是否合格，不合格则报警；(2) According to the data given by the force sensor and the displacement sensor, the press judges whether the pressing stroke and the pressing force value are qualified, and if it is not qualified, it will alarm;

（3）压入第一块偏心块的力值为F1，压入第二块偏心块的力值为F2，其中，F1及F2-F1的力值分别都大于800N，判断为合格，不合格则报警；(3) The force value of pressing the first eccentric block is F1, and the force value of pressing the second eccentric block is F2. Among them, the force values of F1 and F2-F1 are both greater than 800N, and it is judged as qualified or unqualified then call the police;

（4）压入合格后，取出工件，继续下一道工序。(4) After the press-in is qualified, take out the workpiece and continue to the next process.

压机包括机架、压装气缸、力传感器、导向轴、电机放置座，机架15的顶部设有压装气缸11，压装气缸11的伸出轴贯穿机架15的顶部连接上传感器连接板13的上端，上传感器连接板13的下端连接力传感器21的一端，力传感器21的另一端连接下传感器连接板14的上端，下传感器连接板14的下端连接导向轴19的一端，导向轴19的另一端连接导向销18；位于导向销18的正下方设有电机放置座16，所述的电机放置座16位于机架15的前侧，电机放置座16的上端设有电机导向轴17。The press includes a frame, a press-fit cylinder, a force sensor, a guide shaft, and a motor placement seat. The top of the frame 15 is provided with a press-fit cylinder 11, and the extension shaft of the press-fit cylinder 11 runs through the top of the frame 15 and is connected to the upper sensor. The upper end of the plate 13, the lower end of the upper sensor connecting plate 13 connects one end of the force sensor 21, the other end of the force sensor 21 connects the upper end of the lower sensor connecting plate 14, and the lower end of the lower sensor connecting plate 14 connects one end of the guide shaft 19, the guide shaft The other end of 19 connects guide pin 18; Be positioned at guide pin 18 to be provided with motor placement seat 16, described motor placement seat 16 is positioned at the front side of frame 15, and the upper end of motor placement seat 16 is provided with motor guide shaft 17 .

压装气缸11上设有位移传感器。The press-fit cylinder 11 is provided with a displacement sensor.

上传感器连接板13与下传感器连接板14之间采用连接柱20连接，所述的连接柱20分别位于上传感器连接板13与下传感器连接板14之间的四周位置。The upper sensor connecting plate 13 and the lower sensor connecting plate 14 are connected by connecting posts 20 , and the connecting posts 20 are respectively located around the upper sensor connecting plate 13 and the lower sensor connecting plate 14 .

位于压装气缸11的伸出轴左右两侧设有导向杆12，导向杆12的一端位于机架15的上部，导向杆12的另一端贯穿机架15与上传感器连接板13连接。Be positioned at the extension shaft left and right sides of press-fit cylinder 11 to be provided with guide rod 12, one end of guide rod 12 is positioned at the top of frame 15, and the other end of guide rod 12 runs through frame 15 and is connected with upper sensor connecting plate 13.

提供一种具有滚花芯轴的电动真空泵及其压入方法，利用滚花的电机芯轴压入偏心块的偏心孔，以及偏心块为粉末冶金工艺制得，可以保证电机芯轴与偏心块能够牢固连接；并且配合特定的压装工艺，提高了电动真空泵的整体品质，延长使用寿命。An electric vacuum pump with a knurled mandrel and a pressing method thereof are provided. The knurled motor mandrel is used to press into the eccentric hole of the eccentric block, and the eccentric block is made by a powder metallurgy process, which can ensure that the motor mandrel and the eccentric block are It can be firmly connected; and with the specific press-fitting process, the overall quality of the electric vacuum pump is improved and the service life is prolonged.

Claims (9)

1. a kind of electric vacuum pump with annular knurl mandrel, including cylinder cap, shell, motor, it is characterised in that：Shell（4）It is upper Lower both ends are separately connected cylinder cap（1）, the cylinder cap of upper and lower ends（1）Inner end connect diaphragm（5）One end, diaphragm（5）It is another End uses connecting rod（6）Connect eccentric block（8）；Shell（4）Side be equipped with motor（2）, motor（2）Mandrel axis connects two respectively Eccentric block（8）Eccentric orfice；The motor（2）Mandrel be annular knurl toothing.
2. the electric vacuum pump according to claim 1 with annular knurl mandrel, it is characterised in that：The shell（4）'s The other side is equipped with muffler（7）.
3. the electric vacuum pump according to claim 1 with annular knurl mandrel, it is characterised in that：The shell（4）With The cylinder cap of upper and lower ends（1）And diaphragm（5）Vacuum chamber is formed, the forward position positioned at vacuum chamber connects vacuum interface（3）.
4. the electric vacuum pump according to claim 1 with annular knurl mandrel, it is characterised in that：The eccentric block（8） It is made for powder metallurgical technique.
5. a kind of method of press-fitting of the electric vacuum pump with annular knurl mandrel, it is characterised in that：The specific method is as follows：
（1）Motor and two pieces of eccentric blocks are placed in the designated position of press, press is according to specified indentation force value and pushes row Journey carries out primary indentation work, and the stroke of indentation is not more than 30mm, and the force value of indentation is not more than 11000N；
（2）The data that press is provided according to force snesor and displacement sensor judge the stroke of indentation and whether are pressed into force value Qualification, it is unqualified, it alarms；
（3）The force value for being pressed into first piece of eccentric block is F1, and the force value for being pressed into second piece of eccentric block is F2, wherein F1's and F2-F1 Force value is both greater than 800N respectively, is judged as qualified, unqualified, alarms；
（4）After indentation is qualified, workpiece is taken out, continues next process.
6. the method for press-fitting of the electric vacuum pump according to claim 6 with annular knurl mandrel, it is characterised in that：Described Press includes rack, press fitting cylinder, force snesor, guiding axis, motor placement rack, rack（15）Top be equipped with press fitting cylinder （11）, it is pressed cylinder（11）Projecting shaft run through rack（15）Top connect upper sensor connecting plate（13）Upper end, upload Sensor connecting plate（13）Lower end connect force snesor（21）One end, force snesor（21）The other end connection lower sensor connect Fishplate bar（14）Upper end, lower sensor connecting plate（14）Lower end connect guiding axis（19）One end, guiding axis（19）It is another End connection guide pin（18）；Positioned at guide pin（18）Be arranged right below motor placement rack（16）, the motor placement rack （16）Positioned at rack（15）Front side, motor placement rack（16）Upper end be equipped with motor guiding axis（17）.
7. the method for press-fitting of the electric vacuum pump according to claim 6 with annular knurl mandrel, it is characterised in that：Described It is pressed cylinder（11）It is equipped with displacement sensor.
8. the method for press-fitting of the electric vacuum pump according to claim 6 with annular knurl mandrel, it is characterised in that：Described Upper sensor connecting plate（13）With lower sensor connecting plate（14）Between use connecting column（20）Connection, the connecting column（20） It is located at sensor connecting plate（13）With lower sensor connecting plate（14）Between surrounding position.
9. the method for press-fitting of the electric vacuum pump according to claim 6 with annular knurl mandrel, it is characterised in that：Positioned at pressure Fill cylinder（11）Projecting shaft at left and right sides of be equipped with guide rod（12）, guide rod（12）One end be located at rack（15）Top, Guide rod（12）The other end run through rack（15）With upper sensor connecting plate（13）Connection.
CN201810708676.4A 2018-07-02 2018-07-02 Electric vacuum pump and its method of press-fitting with annular knurl mandrel Pending CN108869240A (en)

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CN102257274A (en) * 2008-12-19 2011-11-23 大陆-特韦斯贸易合伙股份公司及两合公司 Motor-pump assembly
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CN203356961U (en) * 2013-05-17 2013-12-25 刘秀萍 Servo press-fitting equipment of starter commutator
CN203484873U (en) * 2013-09-13 2014-03-19 张家港孚冈汽车部件有限公司 Gear pressing device
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CN208543182U (en) * 2018-07-02 2019-02-26 上海汽车制动系统有限公司 The press-loading device of electric vacuum pump with annular knurl mandrel

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