WO2021217885A1 - 一种新型小规格紧凑型电动推杆缸 - Google Patents

一种新型小规格紧凑型电动推杆缸 Download PDF

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WO2021217885A1
WO2021217885A1 PCT/CN2020/101190 CN2020101190W WO2021217885A1 WO 2021217885 A1 WO2021217885 A1 WO 2021217885A1 CN 2020101190 W CN2020101190 W CN 2020101190W WO 2021217885 A1 WO2021217885 A1 WO 2021217885A1
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electric push
push rod
ball screw
piston
rod cylinder
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PCT/CN2020/101190
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English (en)
French (fr)
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周敏
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苏州舍勒智能科技有限公司
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Publication of WO2021217885A1 publication Critical patent/WO2021217885A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • 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

Definitions

  • the invention relates to the technical field of high-precision servo jacking mechanisms, in particular to a new type of small-size compact electric push rod cylinder.
  • the main technical problem solved by the present invention is to provide a new type of small-size compact electric push rod cylinder, which re-optimizes the structure of the existing electric push rod cylinder, so that the structure of the electric push rod cylinder is more compact, the cost is reduced, and the installation is convenient. Adjustments have improved production efficiency.
  • a technical solution adopted by the present invention is: a new small-size compact electric push rod cylinder, comprising: a cylinder body arranged horizontally, a hollow tube, A ball screw and a piston, the front end of the hollow tube is threadedly connected with a front end internal tooth shaft, the rear end of the hollow tube is threadedly connected with the front end of the piston, and the front end of the hollow tube is equipped with an oil-free bearing
  • the oil-free bearing is installed in the front end cover, the front end cover is sleeved with a sealing ring, the rear end of the piston is tightly threaded with the screw nut; the front end of the ball screw penetrates the screw nut And extend into the hollow cavity of the piston, a deep groove ball bearing is installed at the rear end of the ball screw, a rear end cover is installed on both sides of the deep groove ball bearing, and the ball screw passes through a coupling Drive connection with the servo motor.
  • the coupling is a boss plum coupling, and the boss plum coupling is threadedly connected with the ball screw.
  • it further includes a coupling seat fixedly installed at the rear end of the cylinder, the boss plum coupling is arranged in the coupling seat, and the output shaft of the servo motor passes through The boss plum coupling is in transmission connection with the ball screw.
  • a circlip is installed between the front end cover and the inner side wall of the front end of the cylinder, and the front end cover is clamped at the inner hole of the front end of the cylinder by the circlip.
  • a spacer ring is sleeved on the rear side of the deep groove ball bearing on the ball screw.
  • a magnetic ring and a wear ring are provided on the spacer sleeve on the piston.
  • the sealing ring is an O-shaped sealing ring.
  • the beneficial effects of the present invention are: compared with the traditional electric push cylinder, the design of the front and rear end covers is optimized, and the new boss plum coupling is used to replace the original lock nut, making the structure more compact and reliable. It saves space, reduces costs, simplifies assembly steps, and improves production efficiency.
  • an O-ring seal is used at the front end cover, which can automatically adjust centering compensation during movement to improve accuracy.
  • Figure 1 is a cross-sectional structure diagram of a new small-size compact electric push rod cylinder of the present invention
  • Fig. 2 is a structural diagram of a new small-size compact electric push rod cylinder of the present invention.
  • the present invention is a new small size compact electric push rod cylinder, including: a horizontally arranged cylinder block 1, the hollow structure of the cylinder block 1 is horizontally arranged with a hollow tube 2, a ball screw 3 and Piston 4, the front end of the hollow tube 2 is threadedly connected with the front end inner tooth shaft 5, the rear end of the hollow tube 2 is threadedly connected with the front end of the piston 4, and the front end of the hollow tube is installed with an oil-free bearing 6, an oil-free bearing Installed in the front end cover 7, the front end cover is sleeved with a sealing ring 8, the rear end of the piston 4 is tightly threaded with the screw nut 9; the front end of the ball screw 3 penetrates the screw nut and extends into the hollow cavity of the piston, A deep groove ball bearing 10 is installed at the rear end of the ball screw, and a rear end cover 11 is installed on both sides of the deep groove ball bearing to position the ball screw in the axial direction.
  • the ball screw is located in the deep groove
  • the rear side of the ball bearing is sleeved with a spacer ring 14.
  • the ball screw is connected to the servo motor 18 through a coupling 12.
  • the driving principle of the electric push rod part is the same as that of the traditional electric push rod.
  • the servo motor provides torque through The coupling is transmitted to the ball screw. Because of the rotation of the ball screw, the movement of the screw nut drives the threaded piston and the internal tooth shaft at the front end to move back and forth along the axial direction of the ball screw.
  • the coupling 12 is a boss plum coupling
  • the boss plum coupling is threadedly connected with the ball screw
  • the coupling seat 17 is fixedly installed between the cylinder block and the servo motor
  • the boss plum coupling The shaft is installed in the coupling seat.
  • the output shaft of the servo motor is connected to the ball screw through the boss plum coupling and the ball screw.
  • a circlip 13 is installed between the front end cover and the inner side wall of the front end of the cylinder.
  • the front end cover is clamped at the inner hole of the front end of the cylinder by the circlip.
  • the circle can automatically adjust the centering compensation during the movement to improve the accuracy.
  • a magnetic ring 15 is sleeved on the piston, which is used to trigger the reed switch on the cylinder body of the electric push rod cylinder, and transmit the position signal of the ball screw in time, so that the servo motor executes the next command; at the same time, in order to reduce the running process In the friction, prolong the service life, wear-resistant ring 16 is also set on the piston.
  • the beneficial effects of a new small-size compact electric push rod cylinder of the present invention are: compared with the traditional electric push cylinder, the design of the front and rear end covers is optimized, and the rear end cover uses a new type of boss plum coupling
  • the device replaces the original lock nut, which makes the structure more compact and reliable, saves space, reduces costs, simplifies the assembly steps, and improves production efficiency.
  • an O-ring seal is used at the front end cover. It can automatically perform centering compensation to improve accuracy.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

一种小规格紧凑型电动推杆缸，包括：呈水平布置的缸体（1），缸体（1）的中空结构内水平布置有中空管（2）、滚珠丝杠（3）及活塞（4），中空管（2）的前端螺纹连接有前端内牙轴（5），中空管（2）的后端与活塞（4）的前端螺纹连接，中空管（2）的前端安装有无油轴承（6），无油轴承（6）安装在前端盖（7）内，前端盖（7）上套设有密封圈（8），活塞（4）的后端与丝杠螺母（9）紧密螺纹连接；滚珠丝杠（3）的前端贯穿丝杠螺母（9）并延伸至活塞（4）的中空腔体内，滚珠丝杠（3）的后端安装有深沟球轴承（10），深沟球轴承（10）的两侧安装有后端盖（11），滚珠丝杠（3）通过联轴器（12）与伺服电机（18）传动连接。该技术方案对电动推杆缸的前后端盖结构优化，使得结构更为紧凑、可靠，节省空间，成本降低，并简化了装配步骤。

Description

一种新型小规格紧凑型电动推杆缸 技术领域
本发明涉及高精密伺服顶升机构的技术领域，特别是涉及一种新型小规格紧凑型电动推杆缸。
背景技术
由于现有电动推杆缸结构较为复杂，同时对零件加工的精度、安装精度存在较高的要求。特别是在装配时，工人无法准确的保证安装精度，使得电动推杆缸往往达不到设计使用要求。
发明内容
本发明主要解决的技术问题是提供一种新型小规格紧凑型电动推杆缸，对现有电动推杆缸结构进行了重新优化，使得电动推杆缸的结构更为紧凑，成本降低，便于安装调整，提高了生产效率。
为解决上述技术问题，本发明采用的一个技术方案是：一种新型小规格紧凑型电动推杆缸，包括：呈水平布置缸体，所述缸体的中空结构内水平布置有中空管、滚珠丝杠及活塞，所述中空管的前端螺纹连接有前端内牙轴，所述中空管的后端与所述活塞的前端螺纹连接，所述中空管的前端安装有无油轴承，所述无油轴承安装在前端盖内，所述前端盖上套设有密封圈，所述活塞的后端与丝杠螺母紧密螺纹连接；所述滚珠丝杠的前端贯穿所述丝杠螺母并延伸至所述活塞的中空腔体内，所述滚珠丝杠的后端安装有深沟球轴承，所述深沟球轴承的两侧安装有后端盖，所述滚珠丝杠通过联轴器与所述伺服电机传动连接。
在本发明一个较佳实施例中，所述联轴器为凸台梅花联轴器，所述凸台梅花联轴器与所述滚珠丝杠螺纹连接。
在本发明一个较佳实施例中，还包括固定安装在所述缸体后端的联轴器座，所述凸台梅花联轴器设置于联轴器座内，所述伺服电机的输出轴通过凸台梅花联轴器与所述滚珠丝杠传动连接。
在本发明一个较佳实施例中，所述前端盖与所述缸体前端的内侧壁之间安装有卡簧，所述前端盖通过卡簧卡紧在所述缸体的前端内孔处。
在本发明一个较佳实施例中，所述滚珠丝杠上位于深沟球轴承的后侧套设有间隔环。
在本发明一个较佳实施例中，所述活塞上间隔套设有磁环与耐磨环。
在本发明一个较佳实施例中，所述密封圈为O型密封圈。
本发明的有益效果是：与传统的电动推缸相比较，在前后端盖的设计上进行了优化，使用新型凸台梅花联轴器代替原来的锁紧螺母，使得结构更为紧凑、可靠，节省了空间，降低了成本，简化了装配步骤，提高了生产效率，另外，在前端盖处使用了O型密封圈，在运动过程中可自动进行调心补偿，提高精度。
附图说明
为了更清楚地说明本发明实施例中的技术方案，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，下面描述中的附图仅仅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它的附图，其中：
图1是本发明的一种新型小规格紧凑型电动推杆缸的剖视结构图；
图2是本发明的一种新型小规格紧凑型电动推杆缸的结构示意图。
具体实施方式
下面将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 述的实施例仅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前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图1-2，本发明一种新型小规格紧凑型电动推杆缸，包括：呈水平布置缸体1，缸体1的中空结构内水平布置有中空管2、滚珠丝杠3及活塞4，所述中空管2的前端螺纹连接有前端内牙轴5，中空管2的后端与活塞4的前端螺纹连接，中空管的前端安装有无油轴承6，无油轴承安装在前端盖7内，前端盖上套设有密封圈8，活塞4的后端与丝杠螺母9紧密螺纹连接；滚珠丝杠3的前端贯穿丝杠螺母并延伸至活塞的中空腔体内，所述滚珠丝杠的后端安装有深沟球轴承10，深沟球轴承的两侧安装有后端盖11，对滚珠丝杠的轴向起到定位作用，在滚珠丝杠上位于深沟球轴承的后侧套设有间隔环14，所述滚珠丝杠通过联轴器12与伺服电机18传动连接，电动推杠部分的驱动原理与传统的电动推杆一致，由伺服电机提供扭矩通过联轴器传递给滚珠丝杠，因为滚珠丝杠的转动，丝杠螺母移动后带动通过螺纹连接的活塞、前端内牙轴一起沿滚珠丝杠的轴向往复移动。
具体的，所述联轴器12为凸台梅花联轴器，凸台梅花联轴器与滚珠丝杠螺纹连接，联轴器座17固定安装在缸体和伺服电机之间，凸台梅花联轴器安装于联轴器座内，伺服电机的输出轴通过凸台梅花联轴器与滚珠丝杠实现传动连接，与传统的电动推缸相比较，在前后端盖的设计上进行了优化，将原来的外置的前后端盖改为内置，将原来锁紧螺母取消，并使用新型凸台梅花联轴器代替锁紧螺母，使得结构更为紧凑、可靠。
具体的，在前端盖与缸体前端的内侧壁之间安装有卡簧13，前端盖通过卡簧卡紧在缸体的前端内孔处，前端盖上套装的密封圈，优选为O型密封圈，在 运动过程中可自动进行调心补偿，提高精度。
进一步的，在活塞上套设磁环15，用于触发电动推杆缸的缸体上的磁簧开关，及时传输滚珠丝杠的位置信号，使伺服电机执行下一步命令；同时为了减少运行过程中的摩擦，延长使用寿命，在活塞上还套装耐磨环16。
本发明一种新型小规格紧凑型电动推杆缸的有益效果是：与传统的电动推缸相比较，在前后端盖的设计上进行了优化，后端盖处，使用新型凸台梅花联轴器代替原来的锁紧螺母，使得结构更为紧凑、可靠，节省了空间，降低了成本，简化了装配步骤，提高了生产效率，另外，在前端盖处使用了O型密封圈，在运动过程中可自动进行调心补偿，提高精度。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (7)

  1. 一种新型小规格紧凑型电动推杆缸，其特征在于，包括：呈水平布置缸体，所述缸体的中空结构内水平布置有中空管、滚珠丝杠及活塞，所述中空管的前端螺纹连接有前端内牙轴，所述中空管的后端与所述活塞的前端螺纹连接，所述中空管的前端安装有无油轴承，所述无油轴承安装在前端盖内，所述前端盖上套设有密封圈，所述活塞的后端与丝杠螺母紧密螺纹连接；所述滚珠丝杠的前端贯穿所述丝杠螺母并延伸至所述活塞的中空腔体内，所述滚珠丝杠的后端安装有深沟球轴承，所述深沟球轴承的两侧安装有后端盖，所述滚珠丝杠通过联轴器与所述伺服电机传动连接。
  2. 根据权利要求1所述的一种新型小规格紧凑型电动推杆缸，其特征在于，所述联轴器为凸台梅花联轴器，所述凸台梅花联轴器与所述滚珠丝杠螺纹连接。
  3. 根据权利要求2所述的一种新型小规格紧凑型电动推杆缸，其特征在于，还包括固定安装在所述缸体后端的联轴器座，所述凸台梅花联轴器设置于联轴器座内，所述伺服电机的输出轴通过凸台梅花联轴器与所述滚珠丝杠传动连接。
  4. 根据权利要求1所述的一种新型小规格紧凑型电动推杆缸，其特征在于，所述前端盖与所述缸体前端的内侧壁之间安装有卡簧，所述前端盖通过卡簧卡紧在所述缸体的前端内孔处。
  5. 根据权利要求1所述的一种新型小规格紧凑型电动推杆缸，其特征在于，所述滚珠丝杠上位于深沟球轴承的后侧套设有间隔环。
  6. 根据权利要求1所述的一种新型小规格紧凑型电动推杆缸，其特征在于，所述活塞上间隔套设有磁环与耐磨环。
  7. 根据权利要求1-6中任意一项所述的新型小规格紧凑型电动推杆缸，其特征在于，所述密封圈为O型密封圈。
PCT/CN2020/101190 2020-04-27 2020-07-10 一种新型小规格紧凑型电动推杆缸 WO2021217885A1 (zh)

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CN114884265A (zh) * 2022-05-05 2022-08-09 北京大学 内部集成传感器的智能电动推杆
CN115045919A (zh) * 2022-07-15 2022-09-13 杭州电子科技大学信息工程学院 外转子电机用紧凑型联轴器及其安装方法
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