CN112179234A - Ball axial runout rapid detection device - Google Patents
Ball axial runout rapid detection device Download PDFInfo
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- CN112179234A CN112179234A CN202010851595.7A CN202010851595A CN112179234A CN 112179234 A CN112179234 A CN 112179234A CN 202010851595 A CN202010851595 A CN 202010851595A CN 112179234 A CN112179234 A CN 112179234A
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- bearing
- precision
- adjusting mechanism
- mandrel
- shaft sleeve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
Abstract
The invention discloses a ball screw axial runout rapid detection device, which comprises a high-precision ball, a rotary separating mechanism which is arranged on the end surface of a screw and performs circular motion separation, a pre-tightening adjusting mechanism, a precision measuring mechanism and a supporting assembly, wherein the pre-tightening adjusting mechanism is used for pre-tightening the high-precision ball to be attached to the central hole wall of the screw; the precision measuring mechanism penetrates through the rotary separating mechanism and is in point contact with the high-precision sphere. The invention can convert the circumferential rotation precision of the lead screw into the axial run-out precision of a high-precision sphere, the axial run-out precision is transmitted to the dial indicator through the mandrel, and the detection of the axial run-out precision is realized by reading the change of the pointer of the dial indicator; the invention has simple operation, fast detection and strong practicability.
Description
Technical Field
The invention belongs to the technical field of mechanical equipment precision detection, and particularly relates to a rapid detection device for axial runout of a ball screw.
Background
The ball screw converts the rotary motion into linear motion or converts the torque into axial repeated acting force, has the advantages of high bearing capacity, high efficiency, high precision, high reliability and high economy, and is widely applied to transmission systems of various industrial precise equipment. However, assembly precision errors of the lead screw, long-term operation and the like may cause axial runout, so that transmission precision of the whole equipment is affected, and even a workpiece is scrapped.
At present, the technical detection method of the axial runout of the screw comprises the following steps: the high-precision ball is placed in a center hole at one end of the lead screw, the magnetic force gauge stand is matched to clamp a dial gauge fixed point to the highest point of the high-precision ball, and the axial runout of the lead screw is measured on the reciprocating stroke of the lead screw. However, the existing detection method is not only complex in operation, but also low in accuracy, resulting in the following reasons:
1) the installation, fixation and operation are not facilitated due to the limitation of the installation position space of the lead screw;
2) the high-precision ball body cannot be effectively attached to the central hole of the end face of the lead screw;
3) the dial indicator cannot be manually accurately fixed to the highest point of the high-precision sphere.
The device uses a high-precision sphere to convert the circumferential rotation precision of the lead screw into the axial runout of a high-precision sphere, and directly reads the pointer change value of the dial gauge to realize the quick and accurate detection of the axial runout precision of the lead screw by a method of attaching the high-precision mandrel and the high-precision sphere to the dial gauge.
Disclosure of Invention
The invention discloses a device for rapidly detecting axial runout of a ball screw, which aims to realize rapid and accurate detection of axial transmission precision of the ball screw and has important application value for precision state evaluation of the ball screw.
The invention is mainly realized by the following technical scheme: a ball screw axial runout rapid detection device comprises a high-precision ball, a rotary separating mechanism which is installed on the end face of a screw and performs circular motion separation, a pre-tightening adjusting mechanism which is used for pre-tightening the high-precision ball to be attached to the central hole wall of the screw, a precision measuring mechanism and a supporting assembly, wherein the pre-tightening adjusting mechanism is installed on the end face of the screw through the supporting assembly and is connected with the rotary separating mechanism; the precision measuring mechanism penetrates through the rotary separating mechanism and is in point contact with the high-precision sphere.
In order to better realize the invention, the precision measuring mechanism comprises a mandrel and a dial indicator, and the pre-tightening adjusting mechanism is sleeved in the rotary separating mechanism and is attached to the high-precision sphere after penetrating through the rotary separating mechanism; the measuring head is arranged in the inner cavity of the upper end face of the pre-tightening adjusting mechanism, and the measuring head is in contact with the other end of the mandrel.
In the use process, the detection device is arranged on the end face of the lead screw, the detection device is quickly fixed with the end face of the lead screw by using a powerful magnetic seat, the lead screw is rotated and separated from the precision detection mechanism under the action of the rotation separation mechanism, the high-precision ball is effectively attached to a central hole of the end face of the lead screw under the action of the pre-tightening adjustment mechanism, the circumferential rotation precision of the lead screw is converted into the axial runout of the high-precision ball, the axial runout is transmitted to the dial indicator through the mandrel, the change of a pointer of the dial indicator is observed, and the quick and accurate detection of.
In order to better realize the invention, further, the rotary separation mechanism comprises a powerful magnetic seat, a bearing base, a bearing and a shaft sleeve locking nut; a shaft sleeve locking nut is arranged in an inner cavity between the powerful magnetic seat and the bearing base, the powerful magnetic seat is in threaded connection with the bearing base, and the pre-tightening adjusting mechanism sequentially penetrates through the supporting assembly and the bearing, extends into the bearing base and is in threaded connection with the shaft sleeve locking nut; the bearing is installed in the bearing base, the inner ring of the bearing is attached to the pre-tightening adjusting mechanism, the outer ring of the bearing is fixedly connected with the inner cavity of the bearing base, and the supporting assembly is provided with a limiting screw for limiting the rotation of the pre-tightening adjusting mechanism.
In order to better realize the invention, a boss for mounting a bearing gasket and a limiting groove for mounting a limiting ring are further arranged in the cavity of the bearing base, the bearing gasket and the limiting ring are respectively arranged on two sides of the bearing, the shaft sleeve locking nut is attached to the bearing gasket, and when the assembly is finished, a gap is reserved between the bearing gasket and the bottom surface of the inner cavity of the bearing base.
In order to better realize the invention, further, the bottom of the support component is attached to the bearing inner ring, a small boss used for limiting the bearing inner ring is arranged at the bottom of the support component, and the small boss is attached to the bearing inner ring through a special-shaped gasket.
The bearing washer is arranged in an inner cavity of the bearing base, the bottom surface of the bearing washer is attached to the lower surface of the inner cavity, the bearing is arranged in the inner cavity of the bearing base, the upper surface of the bearing inner ring is attached to the upper surface of the bearing washer, the bearing outer ring is matched with the inner cavity of the bearing base for use, the inner cavity of the bearing base is provided with a limiting groove, the limiting ring is arranged in the limiting groove of the inner cavity of the bearing base, and the special-shaped washer is arranged on. The shaft sleeve locking nut is of a through step structure and is connected with the shaft sleeve, the end face of the shaft sleeve locking nut is attached to the bearing washer, threads are arranged in the middle of the connecting base and connected with the shaft sleeve, the bottom face of the connecting base is provided with a hollow small boss, the small boss face of the connecting base is attached to the special-shaped washer, and the side face of the connecting base is provided with a limiting screw mounting hole for mounting a limiting screw and preventing the shaft sleeve from rotating. Through the method, the rotary separating mechanism is formed, the rotary motion of the lead screw is effectively divided into a static part and a moving part, the powerful magnetic seat, the bearing base and the matching part of the powerful magnetic seat are the moving parts, and the shaft sleeve and the part matched with the shaft sleeve are the static parts.
In order to better realize the invention, further, the pre-tightening adjusting mechanism comprises a shaft sleeve, an elastic clamping ejector rod, a spring, a washer, a locking nut and a stop pin; the shaft sleeve is connected with the rotary separating mechanism; an elastic clamping ejector rod is elastically sleeved in the shaft sleeve in a sliding manner, and one end of the elastic clamping ejector rod extends out of the shaft sleeve and is attached to the height ball body; a locking nut is arranged in an inner cavity between the shaft sleeve and the elastic clamping ejector rod, and the cavity of the elastic clamping ejector rod is connected with the locking nut through a spring; the limiting pin penetrates through the shaft sleeve and is in limiting connection with the elastic clamping ejector rod to limit the rotary motion of the elastic clamping ejector rod.
In order to better realize the invention, a step shaft for installing a spring is arranged in a cavity of the elastic clamping ejector rod, and a shaft inner cavity for limiting the position of the spring is arranged in an inner cavity of the shaft sleeve; the bottom of the locking nut is connected with the spring through a washer.
In order to better realize the invention, the shaft sleeve is provided with a square groove corresponding to the limiting pin, the outer side of the elastic clamping ejector rod is correspondingly provided with a translational groove, and the free end of the limiting groove is provided with a handle; the limiting groove moves up and down in the translation groove.
The shaft sleeve is a through step shaft and is matched and connected with the bearing inner ring, and a square groove is formed in the side face of the shaft sleeve and used for installing a stop pin. The elastic clamping ejector rod is a through stepped shaft, the upper end face of the elastic clamping ejector rod is provided with a deformation groove used for clamping elastic deformation of a dial indicator, the middle-upper inner cavity is provided with a groove used for installing an elastic check ring and a limiting surface used for limiting the position of an elastic component, the middle outer cylindrical surface is provided with a translation groove which is matched with a limiting pin and used for limiting the motion direction of the shaft sleeve, and the lower end face of the elastic clamping ejector rod is provided with a cambered surface attached to a high-precision sphere and used for automatically centering and pre-tightening the high-precision sphere. The spring is installed on the elastic clamping ejector rod step shaft, the lower end face of the spring is in surface contact with the elastic clamping ejector rod step shaft, the upper end face of the spring is in contact with the washer, and the washer is in threaded connection with the inner cavity of the shaft sleeve through the locking nut, so that the bottom face of the locking nut is attached to the washer, and the effect of fixing the washer is achieved.
The adjusting device is installed at the upper end of the elastic clamping ejector rod and provided with an adjusting screw rod, and the function of tightness adjustment is realized by contracting and expanding a deformation groove of the elastic clamping ejector rod.
The side surface of the limiting pin is provided with a handle, the limiting pin is arranged in a square groove on the side surface of the shaft sleeve through the action of external force, and the limiting pin is matched with the translational groove of the elastic clamping ejector rod for use and is used for limiting the rotary motion of the elastic clamping ejector rod and only can move up and down.
By the method, the relative position of the high-precision ball body and the lead screw central holes with different diameters can be automatically adjusted, effective fit of the high-precision ball body and the lead screw central holes is guaranteed in real time, and a pre-tightening adjusting function is achieved.
In order to better realize the invention, the precision measuring mechanism further comprises a mandrel, an elastic part, an elastic retainer ring, a dial indicator and an adjusting device, the mandrel is slidably sleeved in the pre-tightening adjusting mechanism, the mandrel is connected with the pre-tightening adjusting mechanism through the elastic part, and the pre-tightening adjusting mechanism is in sliding limit connection with the mandrel through the elastic retainer ring; one end of the mandrel extends out and is in point contact with the high-precision sphere, the dial indicator is installed on the pre-tightening adjusting mechanism through the adjusting device, and the other end of the mandrel is connected with a measuring head of the dial indicator.
In order to better implement the invention, the adjusting device further comprises a deformation groove and an adjusting screw rod for zooming the deformation groove, and the upper end surface of the pre-tightening adjusting mechanism is provided with an elastically-deformed deformation groove for clamping the dial indicator.
In order to better realize the invention, the mandrel is a solid step shaft and comprises a large cylinder, a small cylinder and a concave step which are sequentially connected, the upper end of the elastic component is contacted with the limiting surface of the inner cavity of the pre-tightening adjusting mechanism, and the lower end of the elastic component is contacted with the step surface of the small cylinder, so that the automatic adjustment of the mandrel is realized.
The high-precision ball is used for the transmission component of the axial motion state of the lead screw, one side of the high-precision ball is attached to a central hole of the end face of the lead screw, and the other side of the high-precision ball is attached to the cambered surface of the lower end face of the elastic clamping ejector rod and the lower end face of the mandrel. The core shaft is a solid step shaft and is provided with a large cylinder, a small cylinder platform and concave steps on the upper part of the small cylinder platform. The mandrel is used for transmitting the axial motion state of the lead screw, is assembled in the inner cavity of the elastic clamping ejector rod, the upper end face of the mandrel is contacted with a measuring head of the dial indicator, and the lower end face of the mandrel is in point contact with the high-precision sphere.
The elastic check ring is arranged in a groove of an inner cavity of the elastic clamping ejector rod and is matched with the concave steps of the small cylindrical platform of the mandrel for use, and the limiting effect of the mandrel is achieved. The elastic part is arranged on the step surface of the mandrel, the upper end of the elastic part is in contact with the limiting surface of the inner cavity of the elastic clamping ejector rod, and the lower end of the elastic part is in contact with the step surface of the small cylindrical column of the mandrel, so that the automatic adjustment function of the mandrel is realized. The dial indicator is arranged in an inner cavity of the upper end face of the elastic clamping ejector rod, the measuring head is in contact with the upper surface of the mandrel, and the measuring head is fixed on the elastic clamping ejector rod under the action of the adjusting device.
By the method, the circumferential rotation precision of the lead screw can be converted into the axial runout precision of the high-precision sphere, the axial runout precision is transmitted to the dial indicator through the mandrel, and the axial runout precision is detected by reading the change of the pointer of the dial indicator.
In order to better realize the invention, the supporting device further comprises a threaded rod, a magnetic seat, a handle and a connecting base, the connecting base is provided with a threaded hole corresponding to the pre-tightening adjusting mechanism, the circumferential threads of the connecting base are provided with a plurality of threaded rods, one end of each threaded rod penetrates through the connecting base and is fixedly connected with the magnetic seat, and the other end of each threaded rod is connected with the handle; the magnetic base is connected with the lead screw mounting plate.
The threaded rod is connected with the threaded hole of the connecting base, the upper portion of the threaded rod is provided with an optical axis smaller than the large diameter of the thread and a hole for installing the handle, the lower portion of the threaded rod is connected with the magnetic force seat, the upper end face of the magnetic force seat is provided with a threaded hole and is connected with the threaded rod, the side face of the magnetic force seat is provided with a magnetic force change-over switch, the lower end face of the magnetic force seat is connected with the magnetic force of the.
By the method, the quick fixation and the fixed position adjustment of the pre-tightening adjusting mechanism can be realized, the rotation of the pre-tightening adjusting mechanism is limited, and the pre-tightening adjusting mechanism is ensured to be static relative to the rotating separating mechanism.
The invention has the following beneficial effects:
(1) the rotary separation mechanism effectively divides the rotary motion of the lead screw into a static part and a moving part, the powerful magnetic seat, the bearing base and a matching part of the powerful magnetic seat are moving parts, and the shaft sleeve and a part matched with the shaft sleeve are static parts; the high-precision sphere can be effectively attached to the central hole wall of the end face of the lead screw.
(2) The cambered surface arranged on the elastic clamping ejector rod can accurately center and ensure that a detection point is at the highest point of the high-precision sphere; the elastic clamping ejector rod can realize automatic adjustment of the relative position of the high-precision ball body and the lead screw center holes with different diameters, effective attachment of the high-precision ball body and the lead screw center holes is guaranteed in real time, and a pre-tightening adjusting function is realized.
(3) The support adjusting assembly can realize quick fixation and fixed position adjustment of the pre-tightening adjusting mechanism, limit the rotation of the pre-tightening adjusting mechanism and ensure that the pre-tightening adjusting mechanism is static relative to the rotating separating mechanism; the fixing device is suitable for fixing different positions and has better practicability.
(4) The invention can convert the circumferential rotation precision of the lead screw into the axial run-out precision of a high-precision sphere, the axial run-out precision is transmitted to the dial indicator through the mandrel, and the detection of the axial run-out precision is realized by reading the change of the pointer of the dial indicator; the invention has simple operation, fast detection and strong practicability.
Drawings
FIG. 1 is a view showing a state of the present invention installed on an end surface of a lead screw;
FIG. 2 is a schematic view of the overall structure at A in FIG. 1;
FIG. 3 is a schematic view of the rotating separating mechanism of the present invention;
FIG. 4 is a schematic structural view of the bushing of the present invention;
FIG. 5 is a schematic structural view of the elastic clamping ram of the present invention;
FIG. 6 is a schematic structural view of a mandrel of the present invention;
fig. 7 is a schematic structural diagram of the connection base of the present invention.
Wherein, 1-strong magnetic seat, 2-bearing seat, 3-bearing washer, 4-bearing, 5-spacing ring, 6-special washer, 7-shaft sleeve locking nut, 8-connecting seat, 9-shaft sleeve, 10-elastic clamping ejector rod, 11-spring, 12-washer, 13-locking nut, 14-mandrel, 15-elastic component, 16-elastic retainer ring, 17-dial indicator, 18-adjusting device, 19-high precision sphere, 20-threaded rod, 21-magnetic seat, 22-handle, 23-limit pin, 24-lead screw, 25-lead screw mounting plate,
101-a preformed groove, 102-a stroke inner cavity, 201-a lug boss, 202-a limiting groove,
801-limit screw mounting holes, 802-small bosses, 803-connecting holes,
901-small cylinder, 902-square groove, 903-shaft inner cavity,
1001-cambered surface, 1002-limiting surface, 1003-step shaft, 1004-groove, 1005-deformation groove, 1006-translation groove,
big cylinder, 1402-small cylinder table, 1403-concave step.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
Example 1:
a ball screw axial runout rapid detection device is shown in figure 1 and comprises a high-precision ball 19, a rotary separating mechanism which is installed on the end face of a screw 24 and performs a separating circular motion, a pre-tightening adjusting mechanism, a precision measuring mechanism and a supporting assembly, wherein the pre-tightening adjusting mechanism is used for pre-tightening the high-precision ball 19 to be attached to the central hole wall of the screw 24, and is installed on the end face of the screw 24 through the supporting assembly and connected with the rotary separating mechanism; the precision measuring mechanism passes through the rotating separating mechanism and is in point contact with the high precision sphere 19.
It should be noted that, during assembly, the support assembly is firstly installed on the pre-tightening adjusting mechanism, then the pre-tightening adjusting mechanism is connected with the rotating and separating mechanism, then the precision measuring mechanism is installed in the pre-tightening adjusting mechanism, at this moment, the high-precision sphere 19 and the dial indicator 17 do not need to be installed, finally, the high-precision sphere 19 is placed in a center hole of the end face of the lead screw 24, meanwhile, the rotating and separating mechanism is adsorbed on the end face of the lead screw 24 through magnetic force, the support assembly is adjusted to a proper position and adsorbed on the lead screw installing plate 25 through magnetic force, the limit screw on the base 8 is locked and connected, the dial indicator 17 is installed and locked, and the reading of the dial indicator 17 in the precision measuring mechanism is read, so that the rapid and.
Example 2:
the embodiment is optimized on the basis of embodiment 1, as shown in fig. 1 and fig. 2, the precision measuring mechanism comprises a mandrel 14 and a dial indicator 17, the pre-tightening adjusting mechanism is sleeved in the rotation separating mechanism and is attached to a high-precision sphere 19 after penetrating through the rotation separating mechanism; the core shaft 14 is sleeved in the pre-tightening adjusting mechanism in a sliding mode, one end of the core shaft 14 extends out and is in point contact with the high-precision sphere 19, the dial indicator 17 is installed in the inner cavity of the upper end face of the pre-tightening adjusting mechanism, and the measuring head is in contact with the other end of the core shaft 14.
In the use process of the invention, the detection device is arranged on the end face of the lead screw 24, the device uses the powerful magnetic seat 1 to be quickly fixed with the end face of the lead screw 24, the lead screw 24 is rotated and separated from the precision detection mechanism under the action of the rotation separation mechanism, the high-precision sphere 19 is effectively attached to the center hole of the end face of the lead screw 24 under the action of the pre-tightening adjustment mechanism, the circumferential rotation precision of the lead screw 24 is converted into the axial runout of the high-precision sphere 19, the axial runout is transmitted to the dial indicator 17 through the mandrel 14, the pointer change of the dial indicator 17 is observed, and the quick and accurate detection of the.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
the embodiment is optimized on the basis of embodiment 1 or 2, and as shown in fig. 3, the rotating and separating mechanism comprises a powerful magnetic base 1, a bearing base 2, a bearing 4 and a shaft sleeve locking nut 7; a shaft sleeve locking nut 7 is arranged in an inner cavity between the powerful magnetic seat 1 and the bearing base 2, the powerful magnetic seat 1 is in threaded connection with the bearing base 2, and the pre-tightening adjusting mechanism sequentially penetrates through the supporting component and the bearing 4, extends into the bearing base 2 and is in threaded connection with the shaft sleeve locking nut 7; the bearing 4 is installed in the bearing base 2, the inner ring of the bearing 4 is attached to the pre-tightening adjusting mechanism, the outer ring of the bearing is fixedly connected with the inner cavity of the bearing base 2, and the supporting assembly is provided with a limiting screw for limiting the rotation of the pre-tightening adjusting mechanism.
Further, a boss 201 for installing a bearing gasket 3 and a limiting groove 202 for installing a limiting ring 5 are arranged in the cavity of the bearing base 2, the bearing gasket 3 and the limiting ring 5 are respectively arranged on two sides of the bearing 4, the shaft sleeve locking nut 7 is attached to the bearing gasket 3, and when the assembly is completed, a gap is reserved between the bearing gasket 3 and the bottom surface of the inner cavity of the bearing base 2.
Further, the bottom of the supporting component is attached to the inner ring of the bearing 4, a small boss 802 used for limiting the inner ring of the bearing 4 is arranged at the bottom of the supporting component, and the small boss 802 is attached to the inner ring of the bearing 4 through a special-shaped gasket 12.
Further, the powerful magnetic base 1 is provided with a reserved groove 101 for avoiding the shaft sleeve locking nut 7 and a stroke inner cavity 102 for avoiding the up-and-down movement of the elastic clamping mandril 10.
The rotary separation mechanism effectively divides the rotary motion of the lead screw 24 into a static part and a moving part, the powerful magnetic base 1, the bearing base 2 and a matching part of the powerful magnetic base are moving parts, and the shaft sleeve 9 and a part matched with the shaft sleeve 9 are static parts; the high-precision sphere 19 can be effectively attached to the central hole wall of the end face of the lead screw 24.
The rest of this embodiment is the same as embodiment 1 or 2, and therefore, the description thereof is omitted.
Example 4:
the embodiment is optimized on the basis of any one of embodiments 1 to 3, and the pre-tightening adjusting mechanism comprises a shaft sleeve 9, an elastic clamping ejector rod 10, a spring 11, a washer 12, a locking nut 13 and a stop pin 23; the shaft sleeve 9 is connected with the rotary separating mechanism; an elastic clamping ejector rod 10 is elastically sleeved in the shaft sleeve 9 in a sliding manner, and one end of the elastic clamping ejector rod 10 extends out of the shaft sleeve 9 and is attached to the height ball body; a locking nut 13 is arranged in an inner cavity between the shaft sleeve 9 and the elastic clamping ejector rod 10, and the cavity of the elastic clamping ejector rod 10 is connected with the locking nut 13 through a spring 11; the limiting pin 23 penetrates through the shaft sleeve 9 and is in limiting connection with the elastic clamping ejector rod 10 to limit the rotary motion of the elastic clamping ejector rod 10.
Further, a step shaft 1003 for mounting the spring 11 is arranged in a cavity of the elastic clamping ejector rod 10, and a shaft inner cavity 903 for limiting the position of the spring 11 is arranged in an inner cavity of the shaft sleeve 9; the bottom of the lock nut 13 is connected to the spring 11 through a washer 12.
Further, as shown in fig. 4 and 5, the shaft sleeve 9 is provided with a square groove 902 corresponding to the stopper pin 23, the outer side of the elastic clamping ejector rod 10 is provided with a translational groove 1006 corresponding to the outer side of the elastic clamping ejector rod, and the free end of the stopper groove is provided with a handle 22; the motion-limiting groove moves up and down in the translation groove 1006.
The cambered surface 1001 arranged on the elastic clamping ejector rod 10 can accurately center and ensure that a detection point is at the highest point of the high-precision sphere 19; the elastic clamping ejector rod 10 can realize automatic adjustment of the relative position of the high-precision sphere 19 and the central hole of the lead screw 24 with different diameters, effective fit of the high-precision sphere 19 and the central hole of the lead screw 24 is guaranteed in real time, and a pre-tightening adjusting function is realized.
Other parts of this embodiment are the same as any of embodiments 1 to 3, and thus are not described again.
Example 5:
the embodiment is optimized on the basis of any one of embodiments 1 to 4, and as shown in fig. 2, the precision measurement mechanism comprises a mandrel 14, an elastic part 15, an elastic collar 16, a dial indicator 17 and an adjusting device 18, the mandrel 14 is slidably sleeved in the pre-tightening adjusting mechanism, the mandrel 14 is connected with the pre-tightening adjusting mechanism through the elastic part 15, and the pre-tightening adjusting mechanism is in sliding limit connection with the mandrel 14 through the elastic collar 16; one end of the mandrel 14 extends out and is in point contact with a high-precision sphere 19, the dial indicator 17 is installed on the pre-tightening adjusting mechanism through an adjusting device 18, and the other end of the mandrel 14 is connected with a measuring head of the dial indicator 17.
Further, the adjusting device 18 includes a deformation groove 1005 and an adjusting screw for zooming the deformation groove 1005, and the upper end surface of the pretension adjusting mechanism is provided with an elastically deformed deformation groove 1005 for clamping the dial indicator 17.
Further, as shown in fig. 6, the mandrel 14 is a solid step shaft 1003, the mandrel 14 includes a large cylinder 1401, a small cylinder 1402 and a concave step 1403, which are connected in sequence, the upper end of the elastic component 15 contacts with a limiting surface 1002 of an inner cavity of the pre-tightening adjusting mechanism, and the lower end contacts with a step surface of the small cylinder 1402, so that the mandrel 14 is automatically adjusted.
The invention can convert the circumferential rotation precision of the lead screw 24 into the axial runout precision of the high-precision sphere 19, and the axial runout precision is transmitted to the dial indicator 17 through the mandrel 14, and the detection of the axial runout precision is realized by reading the change of a pointer of the dial indicator 17; the invention has simple operation, fast detection and strong practicability.
Other parts of this embodiment are the same as any of embodiments 1 to 4, and thus are not described again.
Example 6:
the embodiment is optimized on the basis of any one of embodiments 1 to 5, the supporting device comprises a threaded rod 20, a magnetic base 21, a handle 22 and a connecting base 8, as shown in fig. 7, the connecting base 8 is provided with a threaded hole corresponding to the pre-tightening adjusting mechanism, the circumferential threads of the connecting base 8 are provided with a plurality of threaded rods 20, one end of each threaded rod 20 penetrates through the connecting base 8 and is fixedly connected with the magnetic base 21, and the other end of each threaded rod 20 is connected with the handle 22; the magnetic base 21 is connected with a lead screw mounting plate 25.
The support adjusting assembly can realize quick fixation and fixed position adjustment of the pre-tightening adjusting mechanism, limit the rotation of the pre-tightening adjusting mechanism and ensure that the pre-tightening adjusting mechanism is static relative to the rotating separating mechanism; the fixing device is suitable for fixing different positions and has better practicability.
Other parts of this embodiment are the same as any of embodiments 1 to 5, and thus are not described again.
Example 7:
the present embodiment is optimized based on any one of embodiments 1 to 6, and as shown in fig. 3, the rotational separation mechanism includes a powerful magnetic base 1, a bearing base 2, a bearing washer 3, a bearing 4, a spacing ring 5, a special-shaped washer 6, a shaft sleeve lock nut 7, and a connection base 8.
The lower end face of the powerful magnetic seat 1 is magnetically connected with the end face of the lead screw 24, and the upper end face of the powerful magnetic seat is connected with the bearing base 2 through threads. The bearing washer 3 is arranged in the inner cavity of the bearing base 2, and the bottom surface of the bearing washer 3 is attached to the lower surface of the inner cavity; the bearing 4 is arranged in the inner cavity of the bearing base 2, the inner ring of the bearing 4 is attached to the upper surface of the bearing gasket 3, and the outer ring of the bearing 4 is matched with the inner cavity of the bearing base 2 for use. The inner cavity of the bearing base 2 is provided with a limit groove 202, the limit ring 5 is arranged in the limit groove 202 of the inner cavity of the bearing base 2, and the special-shaped gasket 6 is arranged on the uppermost layer and is attached to the inner ring of the bearing 4. The shaft sleeve locking nut 7 is of a through step structure and is connected with the shaft sleeve 9, and the end face of the shaft sleeve locking nut is attached to the bearing washer 3.
As shown in fig. 7, the middle of the connection base 8 is provided with threads to connect with the shaft sleeve 9, the bottom surface is provided with a hollow small boss 802, the upper surface of the small boss 802 is attached to the special-shaped gasket 6, the periphery is provided with connection holes 803 for installing the threaded rod 20, and the side surface is provided with a limit screw installation hole 801 for installing a limit screw to prevent the shaft sleeve 9 from rotating relative to the connection base 8.
It should be noted that the strong magnetic base 1 cannot be connected with the bearing base 2 before the shaft sleeve locking nut 7 is not installed, otherwise, the assembly cannot be completed. The bearing 4 assembly requires that the bearing 4 outer ring and the bearing base 2 inner cavity use through interference fit, and the spacing collar 5 is packed into the spacing groove 202, and the position of restriction bearing 4, axle sleeve lock nut 7 and axle sleeve 9 little cylinder 901 pass through threaded connection to with the laminating of bearing packing ring 3, it is gapped with the bearing base 2 inner cavity bottom surface to assemble completion state bearing packing ring 3.
The connection base 8 is fixedly connected with the shaft sleeve 9 through threads and separated from the upper surface of the bearing base 2, the small boss 802 is attached to the special-shaped washer 6, under the combined action of the shaft sleeve locking nut 7 and the connection base 8, along with the screwing of the shaft sleeve locking nut 7, the inner ring of the bearing 4 is tightened, the effect of pre-tightening and fixing the inner ring of the bearing 4 is achieved, the powerful magnetic seat 1 is connected with the bearing base 2 through threads, the rotary separator is integrated, the lead screw 24 makes circumferential rotary motion and is separated into a static part and a moving part through the bearing 4, and the function of a rotary separation mechanism is achieved.
Other parts of this embodiment are the same as any of embodiments 1 to 6, and thus are not described again.
Example 8:
the embodiment is optimized on the basis of any one of embodiments 1 to 7, and the pre-tightening adjusting mechanism comprises a shaft sleeve 9, an elastic clamping mandril 10, a spring 11, a washer 12, a locking nut 13, an adjusting device 18 and a stop pin 23.
As shown in fig. 4, the sleeve 9 is a through stepped shaft 1003, which is engaged with the inner ring of the bearing 4, and has a square groove 902 on the side for installing the stopper pin 23. As shown in fig. 5, the elastic clamping ejector rod 10 is a through stepped shaft 1003, the upper end surface is provided with a deformation groove 1005 for clamping the elastic deformation of the dial indicator 17, the middle-upper inner cavity is provided with a groove 1004 for installing the elastic collar 16 and a limiting surface 1002 for limiting the position of the elastic component 15, the middle outer cylindrical surface is provided with a translation groove 1006, the translation groove is matched with the limiting pin 23 and is used for limiting the movement direction of the shaft sleeve 9, and the lower end surface is provided with an arc surface 1001 attached to the high-precision sphere 19 and is used for automatically centering and pre-tightening the high-precision sphere 19.
As shown in fig. 5, the spring 11 is mounted on the step shaft 1003 of the elastic clamping ejector rod 10, the lower end surface of the spring is in contact with the step surface of the elastic clamping ejector rod 10, and the upper end surface of the spring is in contact with the gasket 12; the washer 12 is in threaded connection with the inner cavity of the shaft sleeve 9 through the lock nut 13, so that the bottom surface of the lock nut 13 is attached to the washer 12, and the washer 12 is fixed.
The adjusting device 18 is installed at the upper end of the elastic clamping ejector rod 10 and provided with an adjusting screw rod, the function of tightness adjustment is realized by contracting and enlarging a deformation groove 1005 of the elastic clamping ejector rod 10, the stop pin 23 is of a square structure, the handle 22 is arranged on the side surface of the stop pin, the stop pin is installed in a square groove 902 on the side surface of the shaft sleeve 9 under the action of external force and is matched with a translational groove 1006 of the elastic clamping ejector rod 10 for use in limiting the rotary motion of the elastic clamping ejector rod 10 and only can move up and down.
Further, the shaft sleeve 9 is in threaded connection with the shaft sleeve locking nut 7 through a small cylinder 901 of the shaft sleeve 9, so that the shaft sleeve 9 is fixed in the rotary separating mechanism.
It should be noted that the shaft sleeve 9 is matched with the inner ring of the bearing 4 in the rotation separation mechanism, and the connecting base 8 fixes the shaft sleeve 9 under the action of the supporting component, so that the inner ring of the bearing 4 is static relative to the outer ring of the bearing 4, thereby achieving the function of non-rotation motion of the pre-tightening adjusting mechanism and the precision measuring mechanism.
Further, the elastic clamping ejector rod 10 is in contact with the high-precision sphere 19 through the lower end cambered surface 1001, and under the action of the elastic force of the spring 11, the position of the elastic clamping ejector rod 10 is adjusted in real time, so that the cambered surface 1001 at the lower end of the elastic clamping ejector rod 10 is effectively attached to the high-precision sphere 19, the high-precision sphere 19 is effectively connected with the end surface center hole of the lead screw 24, and the centering effect is also achieved.
It should be noted that the contact surface between the elastic clamping ejector rod 10 and the high-precision ball 19 is large, the rotation of the elastic clamping ejector rod 10 is limited by the cooperation of the translational groove 1006 of the elastic clamping ejector rod 10 and the stop pin 23, and the translational groove 1006 has a proper width, so that the elastic clamping ejector rod 10 has a space for up-and-down movement, and the function of adjusting the position is achieved.
Other parts of this embodiment are the same as any of embodiments 1 to 7, and thus are not described again.
Example 9:
the present embodiment is optimized based on any one of embodiments 1 to 8, and the precision measuring mechanism includes a high-precision sphere 19, a mandrel 14, an elastic member 15, a circlip 16, and a dial indicator 17.
The high-precision sphere 19 is used for a transmission part of the axial motion state of the lead screw 24, one side of the high-precision sphere is attached to a central hole in the end face of the lead screw 24, and the other side of the high-precision sphere is attached to the cambered surface 1001 of the lower end face of the elastic clamping mandril 10 and is in point contact with the lower end face of the mandrel 14.
As shown in fig. 6, the mandrel 14 is a solid step shaft 1003, and is provided with a large cylinder 1401, a small cylinder 1402, and a concave step 1403 on the upper portion of the small cylinder 1402. The mandrel 14 is used for transmitting the axial motion state of a lead screw 24 and assembled in the inner cavity of the elastic clamping ejector rod 10, the upper end face of the mandrel is in contact with a measuring head of the dial indicator 17, and the lower end face of the mandrel is in point contact with the high-precision sphere 19. The elastic retainer ring 16 is arranged in a groove 1004 of an inner cavity of the elastic clamping ejector rod 10 and is matched with a concave step 1403 of a small cylindrical stand 1402 of the mandrel 14 for use, so that the limiting effect of the mandrel 14 is achieved; the elastic component 15 is arranged on the step surface of the mandrel 14, the upper end of the elastic component is contacted with the limiting surface 1002 of the inner cavity of the elastic clamping ejector rod 10, and the lower end of the elastic component is contacted with the step surface of the small cylindrical table 1402 of the mandrel 14, so that the automatic adjustment function of the mandrel 14 is realized. The dial indicator 17 is arranged in an inner cavity of the upper end face of the elastic clamping ejector rod 10, the measuring head is in contact with the upper surface of the mandrel 14, and the measuring head is fixed on the elastic clamping ejector rod 10 under the action of the adjusting device 18.
Further, the bottom surface of the large cylinder 1401 of the mandrel 14 is effectively contacted with the high-precision sphere 19 in real time under the action of the elastic force of the elastic component 15.
It should be noted that the mandrel 14 is installed in the inner cavity of the elastic clamping ram 10, and the elastic clamping ram 10 and the mandrel 14 are connected through the elastic component 15. Under the action of the elastic force of the spring 11, the elastic clamping mandril 10 is pushed to move, and the mandrel 14 moves along with the elastic clamping mandril 10 under the action of the elastic part 15.
In order to ensure the stability of the fit between the high-precision sphere 19 and the end face center hole of the lead screw 24, it is required to satisfy that the elastic force of the spring 11 is greater than the elastic force of the elastic component 15, and the elastic force of the elastic component 15 is ensured to extend out of the inner cavity of the elastic clamping mandril 10 in a natural state, and the mandrel 14 has a certain amount of compression when in point contact with the high-precision sphere 19.
Further, the small cylindrical table 1402 of the mandrel 14 is provided with a concave step 1403, the concave step is installed in the inner cavity of the elastic clamping mandril 10, the elastic retainer ring 16 is installed in the groove 1004 of the elastic clamping mandril 10, and the moving position of the mandrel 14 is limited, so that the limiting effect is achieved. It should be noted that the concave step 1403 of the mandrel 14 has a suitable width to allow the mandrel 14 to move up and down.
Other parts of this embodiment are the same as any of embodiments 1 to 8, and thus are not described again.
Example 10:
the present embodiment is optimized based on any one of embodiments 1 to 9, and as shown in fig. 1, 2 and 7, the supporting component mechanism comprises a threaded rod 20, a magnetic base 21 and a handle 22; the threaded rod 20 is connected with a connecting hole 803 of the connecting base 8, the upper part is provided with an optical axis with a diameter smaller than the thread and a hole for installing the handle 22, and the lower part is connected with the magnetic base 21 in a threaded manner. The upper end face of the magnetic base 21 is provided with a threaded hole and is connected with the threaded rod 20, the side face of the magnetic base is provided with a magnetic force change-over switch, the lower end face of the magnetic base is connected with the lead screw mounting plate 25 in a magnetic force mode, and the handle 22 is mounted in an optical axis hole of the threaded rod 20.
Furthermore, the upper end of the threaded rod 20 is connected with the connecting base 8, the lower end of the threaded rod is connected with the magnetic base 21 to form a whole, and the threaded rod is connected with the screw rod mounting plate 25 through magnetic force to play a role in fixedly connecting the base 8.
It should be noted that the threaded rod 20 is in threaded connection with the connecting base 8 through the connecting hole 803, and the height can be freely adjusted under the action of the handle 22 to adapt to different installation environments, the shell of the magnetic base 21 is two magnetizers, the middle of the magnetizer is separated by a non-magnetic copper plate, a rotatable magnet is arranged inside the magnetizer and connected with the magnetic force switch, and the rapid assembly and disassembly are realized by rotating the magnetic force switch.
Other parts of this embodiment are the same as any of embodiments 1 to 9, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (12)
1. The device for rapidly detecting the axial runout of the ball screw is characterized by comprising a high-precision ball (19), a rotary separating mechanism, a pre-tightening adjusting mechanism, a precision measuring mechanism and a supporting assembly, wherein the rotary separating mechanism is mounted on the end face of the screw (24) and used for separating circular motion, the pre-tightening adjusting mechanism is used for pre-tightening the high-precision ball (19) to be attached to the central hole wall of the screw (24), the pre-tightening adjusting mechanism is mounted on the end face of the screw (24) through the supporting assembly, and the pre-tightening adjusting mechanism is connected with the rotary separating; the precision measuring mechanism passes through the rotating separation mechanism and is in point contact with the high-precision sphere (19).
2. The device for rapidly detecting the axial runout of the ball screw according to claim 1, wherein the precision measuring mechanism comprises a mandrel (14) and a dial indicator (17), the pre-tightening adjusting mechanism is sleeved in the rotation separating mechanism and passes through the rotation separating mechanism to be attached to a high-precision sphere (19); the pre-tightening adjusting mechanism is characterized in that a mandrel (14) is sleeved in the pre-tightening adjusting mechanism in a sliding mode, one end of the mandrel (14) extends out and is in point contact with a high-precision sphere (19), the dial indicator (17) is installed in an inner cavity of the upper end face of the pre-tightening adjusting mechanism, and the measuring head is in contact with the other end of the mandrel (14).
3. The rapid detection device for the axial runout of the ball screw according to claim 1 or 2, characterized in that the rotation separation mechanism comprises a powerful magnetic base (1), a bearing base (2), a bearing (4) and a shaft sleeve locking nut (7); a shaft sleeve locking nut (7) is arranged in an inner cavity between the powerful magnetic seat (1) and the bearing base (2), the powerful magnetic seat (1) is in threaded connection with the bearing base (2), and the pre-tightening adjusting mechanism sequentially penetrates through the supporting assembly and the bearing (4), extends into the bearing base (2) and is in threaded connection with the shaft sleeve locking nut (7); the bearing (4) is installed in the bearing base (2), the inner ring of the bearing (4) is attached to the pre-tightening adjusting mechanism, the outer ring of the bearing is fixedly connected with the inner cavity of the bearing base (2), and the supporting component is provided with a limiting screw for limiting the rotation of the pre-tightening adjusting mechanism.
4. The ball screw axial runout rapid detection device according to claim 3, characterized in that a boss (201) for mounting a bearing washer (3) and a limit groove (202) for mounting a limit ring (5) are provided in the cavity of the bearing base (2), the bearing washer (3) and the limit ring (5) are respectively provided on both sides of the bearing (4), the shaft sleeve lock nut (7) is attached to the bearing washer (3), and when the assembly is completed, a gap is provided between the bearing washer (3) and the bottom surface of the inner cavity of the bearing base (2).
5. The rapid detection device for the axial runout of the ball screw according to claim 3, characterized in that the bottom of the support component is attached to the inner ring of the bearing (4), a small boss (802) for limiting the inner ring of the bearing (4) is arranged at the bottom of the support component, and the small boss (802) is attached to the inner ring of the bearing (4) through a special-shaped gasket (12).
6. The device for rapidly detecting the axial runout of the ball screw according to claim 1 or 2, wherein the pre-tightening adjusting mechanism comprises a shaft sleeve (9), an elastic clamping ejector rod (10), a spring (11), a washer (12), a locking nut (13) and a stop pin (23); the shaft sleeve (9) is connected with the rotary separating mechanism; an elastic clamping ejector rod (10) is elastically sleeved in the shaft sleeve (9) in a sliding mode, and one end of the elastic clamping ejector rod (10) extends out of the shaft sleeve (9) and is attached to the height ball body; a locking nut (13) is arranged in an inner cavity between the shaft sleeve (9) and the elastic clamping ejector rod (10), and the cavity of the elastic clamping ejector rod (10) is connected with the locking nut (13) through a spring (11); the limiting pin (23) penetrates through the shaft sleeve (9) and is in limiting connection with the elastic clamping ejector rod (10) to limit the rotary motion of the elastic clamping ejector rod (10).
7. The rapid detection device for the axial runout of the ball screw according to claim 6, characterized in that a step shaft (1003) for installing the spring (11) is arranged in the cavity of the elastic clamping mandril (10), and a shaft inner cavity (903) for limiting the position of the spring (11) is arranged in the inner cavity of the shaft sleeve (9); the bottom of the locking nut (13) is connected with the spring (11) through a washer (12).
8. The rapid detection device for the axial runout of the ball screw according to claim 6, characterized in that the shaft sleeve (9) is provided with a square groove (902) corresponding to the stopper pin (23), the outer side of the elastic clamping ejector rod (10) is correspondingly provided with a translational groove (1006), and the free end of the stopper groove is provided with a handle (22); the limiting groove moves up and down in the translation groove (1006).
9. The rapid detection device for the axial runout of the ball screw according to claim 1 or 2, characterized in that the precision measurement mechanism comprises a mandrel (14), an elastic part (15), a circlip (16), a dial indicator (17) and an adjusting device (18), the mandrel (14) is slidably sleeved in the pre-tightening adjusting mechanism, the mandrel (14) is connected with the pre-tightening adjusting mechanism through the elastic part (15), and the pre-tightening adjusting mechanism is connected with the mandrel (14) in a sliding limiting manner through the circlip (16); one end of the mandrel (14) extends out and is in point contact with the high-precision sphere (19), the dial indicator (17) is installed on the pre-tightening adjusting mechanism through an adjusting device (18), and the other end of the mandrel (14) is connected with a measuring head of the dial indicator (17).
10. The ball screw axial runout rapid detection device according to claim 9, wherein the adjusting device (18) comprises a deformation groove (1005) and an adjusting screw rod for zooming the deformation groove (1005), and the upper end surface of the pretension adjusting mechanism is provided with an elastically deformed deformation groove (1005) for clamping the dial indicator (17).
11. The device for rapidly detecting the axial runout of the ball screw according to claim 9, wherein the mandrel (14) is a solid step shaft (1003), the mandrel (14) comprises a large cylinder (1401), a small cylinder (1402) and a concave step (1403) which are sequentially connected, the upper end of the elastic component (15) is in contact with an inner cavity limiting surface (1002) of the pre-tightening adjusting mechanism, and the lower end of the elastic component is in contact with a step surface of the small cylinder (1402), so that the automatic adjustment of the mandrel (14) is realized.
12. The ball screw axial runout rapid detection device according to claim 1 or 2, wherein the supporting device comprises a threaded rod (20), a magnetic base (21), a handle (22) and a connecting base (8), the connecting base (8) is provided with a threaded hole corresponding to the pre-tightening adjusting mechanism, the circumferential threads of the connecting base (8) are provided with a plurality of threaded rods (20), one end of each threaded rod (20) penetrates through the connecting base (8) and is fixedly connected with the magnetic base (21), and the other end of each threaded rod is connected with the handle (22); the magnetic base (21) is connected with the lead screw mounting plate (25).
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| CN202010851595.7A CN112179234B (en) | 2020-08-21 | 2020-08-21 | Ball axial runout rapid detection device |
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| CN202010851595.7A CN112179234B (en) | 2020-08-21 | 2020-08-21 | Ball axial runout rapid detection device |
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Cited By (3)
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| CN113483613A (en) * | 2021-06-25 | 2021-10-08 | 成都飞机工业（集团）有限责任公司 | Handheld hole normal vector precision detection device and method |
| CN114193232A (en) * | 2021-11-26 | 2022-03-18 | 齐齐哈尔二机床(集团)有限责任公司 | Five-axis tool nose following function precision measuring device and method for heavy floor type boring and milling machine |
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