CN114453980A - Interference control device and method for interference connection between high-speed electric spindle and bearing - Google Patents
Interference control device and method for interference connection between high-speed electric spindle and bearing Download PDFInfo
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Abstract
用于高速电主轴与轴承过盈连接的过盈量调控装置，包括：轴承座(1)、弹簧(2)、轴承(4)、外套筒(5)、内套筒(6)、预紧螺母(7)、电主轴(9)；电主轴的左侧具有轴肩(3)，弹簧套在电主轴上，弹簧的左端连接轴肩且右端连接内套筒，外套筒的左端固定到轴肩；内套筒的内侧壁为圆柱形侧壁且在电主轴上滑动，外侧壁为圆锥形侧壁且尖头朝左；外套筒的外侧壁是圆柱形侧壁且与轴承连接，轴承固定在轴承座上，外套筒的内侧壁是圆锥形侧壁且尖头朝左，内侧壁套在弹簧外，内套筒与外套筒锥度相同，外套筒的内侧壁与内套筒的外侧壁滑动配合；预紧螺母设置在内套筒的右端，通过预紧螺母来调节内套筒的左右位移量。以及该装置的工作方法。
An interference control device for the interference connection between a high-speed electric spindle and a bearing, including: a bearing seat (1), a spring (2), a bearing (4), an outer sleeve (5), an inner sleeve (6), a pre- Tighten nut (7), electric spindle (9); the left side of the electric spindle has a shoulder (3), the spring is sleeved on the electric spindle, the left end of the spring is connected to the shoulder and the right end of the spring is connected to the inner sleeve, and the left end of the outer sleeve is fixed to the shaft shoulder; the inner sidewall of the inner sleeve is a cylindrical sidewall and slides on the motorized spindle, the outer sidewall is a conical sidewall with the tip facing left; the outer sidewall of the outer sleeve is a cylindrical sidewall and is connected to the bearing , the bearing is fixed on the bearing seat, the inner side wall of the outer sleeve is a conical side wall with the tip facing left, the inner side wall is sleeved outside the spring, the inner sleeve and the outer sleeve have the same taper, and the inner side wall of the outer sleeve is the same as the inner The outer side wall of the sleeve is slidably matched; the pre-tightening nut is arranged on the right end of the inner sleeve, and the left and right displacement of the inner sleeve is adjusted by the pre-tightening nut. and the working method of the device.
Description
技术领域technical field
本发明涉及高速电主轴系统的技术领域，尤其涉及一种用于高速电主轴与轴承过盈连接的过盈量调控装置，以及该用于高速电主轴与轴承过盈连接的过盈量调控装置的工作方法。The invention relates to the technical field of high-speed motorized spindle systems, in particular to an interference control device used for the interference connection between the high-speed motorized spindle and the bearing, and the interference control device used for the interference connection between the high-speed motorized spindle and the bearing. working method.
背景技术Background technique
高速电主轴是高速机床的核心部件，其性能好坏在很大程度上决定了整台机床的加工精度和生产效率。主轴组件中，滚动轴承内圈与主轴通常以过盈配合连接，过盈量的大小会影响轴承工作游隙，继而影响主轴的刚度、旋转精度以及主轴和轴承的使用寿命。特别是当主轴高速旋转时，由于离心力和发热作用的影响，使得主轴外径膨胀和轴承内圈扩张，导致主轴-轴承结合界面过盈量增大。随着转速增加，二者间由过盈配合转变为间隙配合，轴承内圈与结合界面的相对运动还会加剧结合界面磨损，导致电主轴和轴承的寿命及可靠性降低。若转速过高，主轴与轴承连接可能松脱，连接失效。The high-speed electric spindle is the core component of the high-speed machine tool, and its performance determines the machining accuracy and production efficiency of the entire machine tool to a large extent. In the spindle assembly, the inner ring of the rolling bearing and the spindle are usually connected with an interference fit. The size of the interference will affect the working clearance of the bearing, which in turn affects the stiffness, rotation accuracy of the spindle and the service life of the spindle and bearing. Especially when the spindle rotates at high speed, due to the influence of centrifugal force and heat generation, the outer diameter of the spindle expands and the inner ring of the bearing expands, resulting in an increase in the amount of interference at the interface between the spindle and the bearing. As the rotation speed increases, the interference fit between the two changes from an interference fit to a clearance fit, and the relative movement between the bearing inner ring and the joint interface will also aggravate the wear of the joint interface, resulting in a reduction in the life and reliability of the motorized spindle and the bearing. If the rotation speed is too high, the connection between the main shaft and the bearing may be loose and the connection will fail.
在实际生产加工中，为保证较高的加工效率和精度，要求高速电主轴需要同时具有高刚性和高速旋转的特性。但是，由于过盈连接的初始过盈量为恒定值，无法改变和调整，很难同时满足电主轴高刚性和高速旋转特性的要求。In actual production and processing, in order to ensure high processing efficiency and precision, high-speed electric spindles are required to have the characteristics of high rigidity and high-speed rotation at the same time. However, since the initial interference of the interference connection is a constant value and cannot be changed and adjusted, it is difficult to meet the requirements of the high rigidity and high-speed rotation characteristics of the electric spindle at the same time.
发明内容SUMMARY OF THE INVENTION
为克服现有技术的缺陷，本发明要解决的技术问题是提供了一种用于高速电主轴与轴承过盈连接的过盈量调控装置，其采用可变初始过盈量技术来确定不同工况下及不同转速下机床主轴-轴承结合界面所需的初始过盈量，能够施加较大的结合界面过盈量来提升高速主轴的刚度以及减小离心膨胀产生的磨损和温升，还能够施加较小的结合界面过盈量来减少过盈连接对配合表面的破坏，结构简单合理、易于维护、控制精度高。In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to provide an interference control device for the interference connection between the high-speed electric spindle and the bearing, which adopts the variable initial interference technology to determine different working conditions. The initial interference required by the machine tool spindle-bearing interface under different conditions and at different speeds can apply a larger interface interference to improve the stiffness of the high-speed spindle and reduce the wear and temperature rise caused by centrifugal expansion. A small amount of interference of the bonding interface is applied to reduce the damage of the interference connection to the mating surface, and the structure is simple and reasonable, easy to maintain, and high in control precision.
本发明的技术方案是：这种用于高速电主轴与轴承过盈连接的过盈量调控装置，其包括：轴承座(1)、弹簧(2)、轴承(4)、外套筒(5)、内套筒(6)、预紧螺母(7)、电主轴(9)；The technical scheme of the present invention is: the interference adjustment device for the interference connection between the high-speed electric spindle and the bearing, which comprises: a bearing seat (1), a spring (2), a bearing (4), an outer sleeve (5) ), inner sleeve (6), preload nut (7), electric spindle (9);
电主轴的左侧具有轴肩(3)，弹簧套在电主轴上，弹簧的左端连接轴肩且右端连接内套筒，外套筒的左端固定到轴肩；The left side of the electro-spindle is provided with a shaft shoulder (3), the spring is sleeved on the electro-spindle, the left end of the spring is connected to the shaft shoulder and the right end of the spring is connected to the inner sleeve, and the left end of the outer sleeve is fixed to the shaft shoulder;
内套筒的内侧壁为圆柱形侧壁且在电主轴上滑动，外侧壁为圆锥形侧壁且尖头朝左；The inner side wall of the inner sleeve is a cylindrical side wall and slides on the electric spindle, and the outer side wall is a conical side wall with the tip facing left;
外套筒的外侧壁是圆柱形侧壁且与轴承连接，轴承固定在轴承座上，外套筒的内侧壁是圆锥形侧壁且尖头朝左，外套筒的内侧壁套在弹簧外，内套筒与外套筒锥度相同，外套筒的内侧壁与内套筒的外侧壁滑动配合；The outer side wall of the outer sleeve is a cylindrical side wall and is connected with the bearing, the bearing is fixed on the bearing seat, the inner side wall of the outer sleeve is a conical side wall and the tip is facing left, and the inner side wall of the outer sleeve is sleeved outside the spring. , the inner sleeve has the same taper as the outer sleeve, and the inner side wall of the outer sleeve is slidingly matched with the outer side wall of the inner sleeve;
预紧螺母设置在内套筒的右端，通过预紧螺母来调节内套筒的左右位移量。The pre-tightening nut is arranged on the right end of the inner sleeve, and the left and right displacement of the inner sleeve is adjusted by the pre-tightening nut.
本发明的弹簧套在电主轴上，弹簧的左端连接轴肩且右端连接内套筒，外套筒的左端固定到轴肩；内套筒的内侧壁为圆柱形侧壁且在电主轴上滑动，外侧壁为圆锥形侧壁且尖头朝左；外套筒的外侧壁是圆柱形侧壁且与轴承连接，轴承固定在轴承座上，外套筒的内侧壁是圆锥形侧壁且尖头朝左，外套筒的内侧壁套在弹簧外，内套筒与外套筒锥度相同，外套筒的内侧壁与内套筒的外侧壁滑动配合；预紧螺母设置在内套筒的右端，通过预紧螺母来调节内套筒的左右位移量，从而采用可变初始过盈量技术来确定不同工况下及不同转速下机床主轴-轴承结合界面所需的初始过盈量，能够施加较大的结合界面过盈量来提升高速主轴的刚度以及减小离心膨胀产生的磨损和温升，还能够施加较小的结合界面过盈量来减少过盈连接对配合表面的破坏，结构简单合理、易于维护、控制精度高。The spring of the present invention is sleeved on the electric main shaft, the left end of the spring is connected to the shaft shoulder and the right end of the spring is connected to the inner sleeve, the left end of the outer sleeve is fixed to the shaft shoulder; the inner side wall of the inner sleeve is a cylindrical side wall and slides on the electric main shaft , the outer side wall is a conical side wall and the pointed end is facing left; the outer side wall of the outer sleeve is a cylindrical side wall and is connected with the bearing, the bearing is fixed on the bearing seat, and the inner side wall of the outer sleeve is a conical side wall with a pointed end. Head to the left, the inner side wall of the outer sleeve is sleeved outside the spring, the inner sleeve and the outer sleeve have the same taper, the inner side wall of the outer sleeve and the outer side wall of the inner sleeve are slidingly matched; the pre-tightening nut is arranged on the inner sleeve At the right end, the left and right displacement of the inner sleeve is adjusted by pre-tightening the nut, so that the variable initial interference technology is used to determine the initial interference required by the machine tool spindle-bearing interface under different working conditions and different speeds. Apply a large amount of interface interference to improve the rigidity of the high-speed spindle and reduce the wear and temperature rise caused by centrifugal expansion, and can also apply a small amount of interface interference to reduce the damage to the mating surface caused by the interference connection. Simple and reasonable, easy to maintain, and high control precision.
还提供了一种用于高速电主轴与轴承过盈连接的过盈量调控装置的方法，其包括以下步骤：Also provided is a method for an interference amount regulating device for the interference connection between a high-speed electric spindle and a bearing, which comprises the following steps:
(1)弹簧套在电主轴上，弹簧的左端连接轴肩处的应变片，外套筒套在弹簧外且左端固定到轴肩；(1) The spring is sleeved on the electric spindle, the left end of the spring is connected to the strain gauge at the shoulder, the outer sleeve is sleeved outside the spring and the left end is fixed to the shoulder;
(2)内套筒插入外套筒与电主轴之间，内套筒的内侧壁与电主轴间隙配合装配，内套筒外侧壁与外套筒的内侧壁滑动连接；(2) The inner sleeve is inserted between the outer sleeve and the motorized spindle, the inner sidewall of the inner sleeve and the motorized spindle are gap-fitted and assembled, and the outer sidewall of the inner sleeve is slidably connected to the inner sidewall of the outer sleeve;
(3)外套筒的外侧壁连接固定在轴承座上的轴承；(3) The outer side wall of the outer sleeve is connected to the bearing fixed on the bearing seat;
(4)通过拧动预紧螺母使内套筒缓慢向左移动，内套筒与外套筒的过盈量逐渐增大，完成对过盈量的增大调节；或者，通过拧动预紧螺母，内套筒左端弹簧顶着内套筒使其缓慢向右移动，内套筒与外套筒的过盈量逐渐增小，完成对过盈量的减小调节；(4) The inner sleeve is slowly moved to the left by twisting the pre-tightening nut, and the interference between the inner sleeve and the outer sleeve is gradually increased to complete the adjustment of the increase in the interference; or, by screwing the pre-tightening The nut, the spring at the left end of the inner sleeve pushes the inner sleeve to move it slowly to the right, and the interference between the inner sleeve and the outer sleeve gradually decreases, and the adjustment for the reduction of the interference is completed;
(5)调节结束后，使用锁紧螺母锁住预紧螺母。(5) After adjustment, use the lock nut to lock the preload nut.
附图说明Description of drawings
图1示出了根据本发明的用于高速电主轴与轴承过盈连接的过盈量调控装置的结构示意图。FIG. 1 shows a schematic structural diagram of an interference control device for interference connection between a high-speed electric spindle and a bearing according to the present invention.
具体实施方式Detailed ways
如图1所示，这种用于高速电主轴与轴承过盈连接的过盈量调控装置，其包括：轴承座1、弹簧2、轴承4、外套筒5、内套筒6、预紧螺母7、电主轴9；As shown in Figure 1, this interference adjustment device for the interference connection between the high-speed electric spindle and the bearing includes: a
电主轴的左侧具有轴肩3，弹簧套在电主轴上，弹簧的左端连接轴肩且右端连接内套筒，外套筒的左端固定到轴肩；The left side of the electro-spindle has a
内套筒的内侧壁为圆柱形侧壁且在电主轴上滑动，外侧壁为圆锥形侧壁且尖头朝左；The inner side wall of the inner sleeve is a cylindrical side wall and slides on the electric spindle, and the outer side wall is a conical side wall with the tip facing left;
外套筒的外侧壁是圆柱形侧壁且与轴承连接，轴承固定在轴承座上，外套筒的内侧壁是圆锥形侧壁且尖头朝左，外套筒的内侧壁套在弹簧外，内套筒与外套筒锥度相同，外套筒的内侧壁与内套筒的外侧壁滑动配合；The outer side wall of the outer sleeve is a cylindrical side wall and is connected with the bearing, the bearing is fixed on the bearing seat, the inner side wall of the outer sleeve is a conical side wall and the tip is facing left, and the inner side wall of the outer sleeve is sleeved outside the spring. , the inner sleeve has the same taper as the outer sleeve, and the inner side wall of the outer sleeve is slidingly matched with the outer side wall of the inner sleeve;
预紧螺母设置在内套筒的右端，通过预紧螺母来调节内套筒的左右位移量。The pre-tightening nut is arranged on the right end of the inner sleeve, and the left and right displacement of the inner sleeve is adjusted by the pre-tightening nut.
本发明的弹簧套在电主轴上，弹簧的左端连接轴肩且右端连接内套筒，外套筒的左端固定到轴肩；内套筒的内侧壁为圆柱形侧壁且在电主轴上滑动，外侧壁为圆锥形侧壁且尖头朝左；外套筒的外侧壁是圆柱形侧壁且与轴承连接，轴承固定在轴承座上，外套筒的内侧壁是圆锥形侧壁且尖头朝左，外套筒的内侧壁套在弹簧外，内套筒与外套筒锥度相同，外套筒的内侧壁与内套筒的外侧壁滑动配合；预紧螺母设置在内套筒的右端，通过预紧螺母来调节内套筒的左右位移量，从而采用可变初始过盈量技术来确定不同工况下及不同转速下机床主轴-轴承结合界面所需的初始过盈量，能够施加较大的结合界面过盈量来提升高速主轴的刚度以及减小离心膨胀产生的磨损和温升，还能够施加较小的结合界面过盈量来减少过盈连接对配合表面的破坏，结构简单合理、易于维护、控制精度高。The spring of the present invention is sleeved on the electric main shaft, the left end of the spring is connected to the shaft shoulder and the right end of the spring is connected to the inner sleeve, the left end of the outer sleeve is fixed to the shaft shoulder; the inner side wall of the inner sleeve is a cylindrical side wall and slides on the electric main shaft , the outer side wall is a conical side wall and the pointed end is facing left; the outer side wall of the outer sleeve is a cylindrical side wall and is connected with the bearing, the bearing is fixed on the bearing seat, and the inner side wall of the outer sleeve is a conical side wall with a pointed end. Head to the left, the inner side wall of the outer sleeve is sleeved outside the spring, the inner sleeve and the outer sleeve have the same taper, the inner side wall of the outer sleeve and the outer side wall of the inner sleeve are slidingly matched; the pre-tightening nut is arranged on the inner sleeve At the right end, the left and right displacement of the inner sleeve is adjusted by pre-tightening the nut, so that the variable initial interference technology is used to determine the initial interference required by the machine tool spindle-bearing interface under different working conditions and different speeds. Apply a large amount of interface interference to improve the rigidity of the high-speed spindle and reduce the wear and temperature rise caused by centrifugal expansion, and can also apply a small amount of interface interference to reduce the damage to the mating surface caused by the interference connection. Simple and reasonable, easy to maintain, and high control precision.
优选地，在所述轴肩上贴有应变片，所述弹簧连接到所述应变片。应变片是由敏感栅等构成用于测量应变的元件。电阻应变片的工作原理是基于应变效应制作的，即导体或半导体材料在外界力的作用下产生机械变形时，其电阻值相应的发生变化，这种现象称为“应变效应”。通过应变片可以准确地获得弹簧的形变量，即内套筒的轴向位移量，也就能够精确地得到初始过盈量。Preferably, a strain gauge is attached to the shoulder, and the spring is connected to the strain gauge. Strain gauges are components used to measure strain composed of sensitive grids and the like. The working principle of the resistance strain gauge is based on the strain effect, that is, when the conductor or semiconductor material is mechanically deformed under the action of external force, its resistance value changes accordingly. This phenomenon is called "strain effect". The deformation amount of the spring, that is, the axial displacement of the inner sleeve, can be accurately obtained through the strain gauge, and the initial interference amount can also be accurately obtained.
优选地，所述内套筒的右侧设置凸缘，安装在主轴右端上的预紧螺母的预紧力作用在凸缘上。这样设计是为了使预紧力均匀作用到内套筒，增大内套筒的使用寿命。Preferably, a flange is provided on the right side of the inner sleeve, and the pre-tightening force of the pre-tightening nut installed on the right end of the main shaft acts on the flange. This design is to make the pre-tightening force evenly act on the inner sleeve and increase the service life of the inner sleeve.
优选地，所述轴承为双列角接触球轴承。双列角接触球轴承的设计基本上与单列角接触球轴承相同，但只占用更小的轴向空间。双列角接触球轴承可以承受径向负荷和作用在两个方向的轴向负荷，它能限制轴或外壳双向轴向位移。Preferably, the bearing is a double row angular contact ball bearing. The design of double row angular contact ball bearings is basically the same as that of single row angular contact ball bearings, but only takes up less axial space. Double row angular contact ball bearings can withstand radial loads and axial loads acting in two directions, and it can limit the bidirectional axial displacement of the shaft or housing.
优选地，所述外套筒紧配合地安装在所述双列角接触球轴承的轴承内圈上。Preferably, the outer sleeve is tightly fitted on the bearing inner ring of the double row angular contact ball bearing.
优选地，所述内套筒间隙配合安装在电主轴上，且与外套筒过盈连接装配。Preferably, the inner sleeve is installed on the electric spindle with clearance fit, and is assembled with the outer sleeve in an interference connection.
优选地，在所述预紧螺母的右侧设置锁紧螺母8。调节结束后，使用锁紧螺母锁住预紧螺母。Preferably, a
优选地，所述预紧螺母与锁紧螺母的螺纹方向相反。这样能够防止在主轴运转过程中出现松动现象。Preferably, the thread direction of the preload nut is opposite to that of the lock nut. This prevents loosening during spindle operation.
还提供了一种用于高速电主轴与轴承过盈连接的过盈量调控装置的方法，其包括以下步骤：Also provided is a method for an interference amount regulating device for the interference connection between a high-speed electric spindle and a bearing, which comprises the following steps:
(1)弹簧套在电主轴上，弹簧的左端连接轴肩处的应变片，外套筒套在弹簧外且左端固定到轴肩；(1) The spring is sleeved on the electric spindle, the left end of the spring is connected to the strain gauge at the shoulder, the outer sleeve is sleeved outside the spring and the left end is fixed to the shoulder;
(2)内套筒插入外套筒与电主轴之间，内套筒的内侧壁与电主轴间隙配合装配，内套筒外侧壁与外套筒的内侧壁滑动连接；(2) The inner sleeve is inserted between the outer sleeve and the motorized spindle, the inner sidewall of the inner sleeve and the motorized spindle are gap-fitted and assembled, and the outer sidewall of the inner sleeve is slidably connected to the inner sidewall of the outer sleeve;
(3)外套筒的外侧壁连接固定在轴承座上的轴承；(3) The outer side wall of the outer sleeve is connected to the bearing fixed on the bearing seat;
(4)通过拧动预紧螺母使内套筒缓慢向左移动，内套筒与外套筒的过盈量逐渐增大，完成对过盈量的增大调节；或者，通过拧动预紧螺母，内套筒左端弹簧顶着内套筒使其缓慢向右移动，内套筒与外套筒的过盈量逐渐增小，完成对过盈量的减小调节；(4) The inner sleeve is slowly moved to the left by twisting the pre-tightening nut, and the interference between the inner sleeve and the outer sleeve is gradually increased to complete the adjustment of the increase in the interference; or, by screwing the pre-tightening nut, the spring at the left end of the inner sleeve pushes against the inner sleeve to move it slowly to the right, the interference between the inner sleeve and the outer sleeve gradually decreases, and the adjustment for the reduction of the interference is completed;
(5)调节结束后，使用锁紧螺母锁住预紧螺母。(5) After adjustment, use the lock nut to lock the preload nut.
本发明的设计原理是：通过将内套筒向左移动的方式调节主轴与轴承内圈过盈连接的过盈量，将内套筒的轴向位移的变化转化为径向过盈量的变化，将主轴与轴承内圈的过盈连接转化到套筒之间的过盈配合，通过内套筒左端弹簧的受力大小调节初始过盈量。根据不同工况选择合理的初始过盈量，通过拧动预紧螺母使内套筒缓慢向左移动，内套筒与外套筒的过盈量逐渐增大，完成对过盈量的增大调节；同理，反向拧动预紧螺母，内套筒左端弹簧顶着内套筒使其缓慢向右移动，内套筒与外套筒的过盈量逐渐增小，完成对过盈量的减小调节。调节结束后，使用锁紧螺母锁住预紧螺母。The design principle of the present invention is: by moving the inner sleeve to the left, the interference between the main shaft and the bearing inner ring is adjusted by the interference, and the change of the axial displacement of the inner sleeve is converted into the change of the radial interference. , convert the interference connection between the main shaft and the inner ring of the bearing into the interference fit between the sleeves, and adjust the initial interference amount through the force of the spring at the left end of the inner sleeve. Select a reasonable initial interference according to different working conditions. By turning the pre-tightening nut, the inner sleeve slowly moves to the left, and the interference between the inner sleeve and the outer sleeve gradually increases, and the increase of the interference is completed. Adjustment; in the same way, screw the pre-tightening nut in the opposite direction, the spring at the left end of the inner sleeve pushes against the inner sleeve to move it slowly to the right, and the interference between the inner sleeve and the outer sleeve gradually decreases, completing the adjustment of the interference. reduction adjustment. After adjustment, lock the preload nut with the lock nut.
本发明的有益效果在于：The beneficial effects of the present invention are:
(1)只需控制内套筒的轴向位移，就可以改变过盈量的大小，最终实现可控过盈量的过盈装配，使主轴在完成完成一系列低速大转矩切削运动和高速大功率小转矩切削运动时，在高速运转时可提高过盈量，有效减少离心力带来的负面影响，提高主轴和轴承的旋转精度和寿命。(1) Only by controlling the axial displacement of the inner sleeve, the size of the interference can be changed, and finally the interference assembly with controllable interference can be realized, so that the spindle can complete a series of low-speed and high-torque cutting motions and high-speed cutting motions. In high-power and low-torque cutting motion, the interference can be increased during high-speed operation, effectively reducing the negative impact of centrifugal force, and improving the rotation accuracy and life of the spindle and bearings.
(2)由于轴向位移大小可知，可以准确得到弹簧弹力和轴向位移的关系，从而实现对径向过盈量的精准控制；(2) Since the magnitude of the axial displacement can be known, the relationship between the spring force and the axial displacement can be accurately obtained, so as to realize the precise control of the radial interference;
(3)通过控制轴向位移调整弹簧弹力，力传感器显示弹簧弹力的大小，避免了只依靠操作者的经验来判断特定工况下装配过盈量是否合适。(3) Adjust the spring force by controlling the axial displacement, and the force sensor shows the size of the spring force, which avoids relying only on the operator's experience to judge whether the assembly interference is appropriate under specific working conditions.
(4)该装置机构设计简单、合理，采用两个锥形套筒和弹簧以及预紧螺母的配合，采用锥形套筒具有自锁性质的约束，将两个锥形套筒可靠的固定在主轴上，满足了可调控过盈量电主轴的使用要求。(4) The design of the device is simple and reasonable. It adopts the cooperation of two conical sleeves, a spring and a preload nut, and adopts the self-locking constraint of the conical sleeve to reliably fix the two conical sleeves on the On the spindle, it meets the requirements for the use of the motorized spindle with adjustable interference.
以上所述，仅是本发明的较佳实施例，并非对本发明作任何形式上的限制，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属本发明技术方案的保护范围。The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the present invention The protection scope of the technical solution of the invention.
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