Anti-collision device for thread scanner probe

Abstract

The present invention relates to the technical field of anti-collision devices for threaded scanner probes, and discloses an anti-collision device for threaded scanner probes, including a scanning shaft, wherein a protective cavity is provided inside the scanning shaft. In the present invention, the shear force on the connecting part is greater than the adsorption force between the strong magnet block 1 and the strong magnet block 2, at which time the sliding round block 1 drives the side head anti-collision sliding seat to slide along the protective cavity toward one end close to the through-wire hole, and a relative displacement is generated between the side head anti-collision fixed seat and the side head anti-collision sliding seat, at which time the fixed contact is disconnected from the sliding contact, and when the computer detects that the corresponding IO port input is disconnected, the control software will execute a collision exception handling program, at which time all control motor movement operations on the software will be prohibited, and a collision prompt window will pop up, and the scanning shaft will stop driving the measuring head on the measuring rod to rotate, and such a setting is conducive to avoiding the measuring head from continuing to rotate and causing a secondary collision, thereby protecting the measuring head from further damage.

Description

Technical Field

[0001] The invention relates to the technical field of anti-collision devices for thread scanner measuring needles, and in particular to an anti-collision device for thread scanner measuring needles. Background Art

[0002] A thread scanner is a device for measuring thread dimensions. As a mechatronic computer peripheral product, it can convert scanned graphics into a digital format that can be displayed, edited, stored and output by a computer. It is a very powerful input device.

[0003] The thread scanners currently on the market lack an anti-collision device during use, which makes it easy for the side head to collide with the object being measured during the measurement process, which can easily cause damage to the striker, causing certain losses and also affecting the working efficiency and measurement accuracy of the thread scanner; therefore, there is an urgent need for an anti-collision device for the thread scanner probe. Summary of the invention

[0004] The object of the present invention is to provide an anti-collision device for a thread scanner stylus to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is an anti-collision device for a thread scanner probe, comprising a scanning shaft, a protective cavity is provided inside the scanning shaft, a telescopic sliding cavity is provided at one end of the scanning shaft away from the protective cavity, a measuring rod is slidably connected to one end of the scanning shaft close to the telescopic sliding cavity, a plurality of measuring heads are fixedly connected to one end of the measuring rod away from the scanning shaft, a wire-through hole is provided at the central axis of one end of the scanning shaft away from the measuring rod, and further comprising:

[0007] The rotating measuring mechanism includes a side head anti-collision fixing seat fixedly connected to the end of the protective cavity inside the scanning shaft away from the telescopic sliding cavity, the end of the side head anti-collision fixing seat away from the through-wire hole is set to a semi-cylindrical shape, a side head anti-collision sliding seat is set inside the protective cavity, and the end of the side head anti-collision sliding seat close to the through-wire hole is set to a semi-cylindrical shape, the side head anti-collision fixing seat and the side wall of the side head anti-collision sliding seat are tightly attached to each other, a limiting boss is set inside the scanning shaft, and the side head anti-collision sliding seat is rotatably connected to the inner wall of the limiting boss.

[0008] Furthermore, an anti-collision retraction mechanism is arranged inside the telescopic sliding cavity, and the anti-collision retraction mechanism includes a sliding round block fixedly connected to one end of the side head anti-collision sliding seat away from the side head anti-collision fixed seat, and a plurality of sliding rods are fixedly connected to the side of the limiting boss away from the side head anti-collision fixed seat, and the sliding round block is slidably connected to the middle part of the plurality of sliding rods.

[0009] Furthermore, the anti-collision retracting mechanism also includes a sliding sleeve slidably connected to one end of the rotating sliding rod away from the limiting boss, and the top of the sliding sleeve is tightly attached to the bottom of the sliding round block.

[0010] Furthermore, the anti-collision retraction mechanism also includes a sliding round block 2 fixedly connected to the end of the measuring rod close to the sliding round block 1, and a plurality of connecting columns are fixedly connected to the side of the sliding round block 2 away from the measuring rod, and the end of the connecting column away from the sliding round block 2 is rotatably connected to a rotating block, and the end of the rotating block away from the connecting column is rotatably connected to a linkage rod, and the end of the linkage rod away from the connecting column is rotatably connected to the bottom of the sliding sleeve.

[0011] Furthermore, an anti-collision protection mechanism is arranged inside the protective cavity, a groove is opened directly above the side head anti-collision fixing seat, a strong magnet block is arranged inside the groove, and a plurality of insulating grooves are opened on the top of the side head anti-collision fixing seat, and an insulating block is fixedly connected inside the insulating groove.

[0012] Furthermore, the anti-collision protection mechanism also includes a wire through groove opened inside the side head anti-collision fixing seat, a sensor wire is arranged inside the wire through groove, the end of the sensor wire away from the side head anti-collision fixing seat is electrically connected to the control motor through the wire through hole, and a plurality of sub-wires are fixedly connected to the end of the sensor wire close to the insulating block one, and a fixed contact is fixedly connected to the inside of the insulating block one, and the bottom of the fixed contact is fixedly connected to the sub-wire.

[0013] Furthermore, the anti-collision protection mechanism also includes a strong magnet block 2 fixedly connected to the inside of the side head anti-collision sliding seat, the strong magnet block 2 is arranged corresponding to the strong magnet block 1, and a plurality of insulating blocks 2 are fixedly connected to the bottom of the side head anti-collision sliding seat, and a sliding contact is fixedly connected inside the insulating block 2. The sliding contact is tightly attached to the corresponding fixed contact, and a connecting wire is fixedly connected to the end of the sliding contact away from the side head anti-collision fixed seat.

[0014] Furthermore, a limiting mechanism is arranged on the top of the side head anti-collision fixing seat, the limiting mechanism includes a plurality of positioning circular grooves opened directly above the side head anti-collision fixing seat, a plurality of sliding grooves are opened directly above the side head anti-collision fixing seat, a plurality of extrusion springs are arranged inside the side head anti-collision sliding seat, a positioning ball is arranged at the bottom of the extrusion spring, the positioning ball corresponds to the positioning circular groove, a plurality of sliding pins are fixedly connected to the position of the sliding groove at the bottom of the side head anti-collision sliding seat corresponding to the position of the sliding groove, and the end of the sliding pin away from the side head anti-collision sliding seat is slidably connected inside the sliding groove.

[0015] The present invention has the following beneficial effects:

[0016] (1) The present invention provides an anti-collision retracting mechanism. When the scanning shaft drives the measuring head on the measuring rod to rotate clockwise, when the measuring head collides with the thread inside the workpiece, the rotation of the measuring head is hindered, and a rotation speed difference is generated between the sliding round block 2 at one end of the measuring rod and the sliding round block 1. At this time, the sliding round block 2 rotates counterclockwise relative to the sliding round block 1. The sliding round block 2 drives the rotating blocks at one end of the connecting column to rotate. The sliding round block 2 drives the sliding sleeve at one end of the linkage rod to push the sliding round block 1 upward along the sliding rod. The sliding round block 1 moves along the telescopic sliding cavity to one end close to the side head anti-collision sliding seat. When a collision occurs, the shear force on the connecting part is greater than The adsorption force between the strong magnet block 1 and the strong magnet block 2, at this time, the sliding round block 1 drives the side head anti-collision sliding seat to slide along the protection cavity to the end close to the wire hole, and a relative displacement occurs between the side head anti-collision fixed seat and the side head anti-collision sliding seat. At this time, the fixed contact is disconnected from the sliding contact. When the computer detects that the corresponding IO port input is disconnected, the control software will execute the collision exception handling procedure. At this time, all control motor movement operations on the software will be prohibited, and a collision prompt window will pop up. The scanning shaft stops driving the measuring head on the measuring rod to rotate. This setting is conducive to avoiding secondary collision caused by continued rotation of the measuring head, thereby protecting the measuring head from further damage.

[0017] (2) In the present invention, when the anti-collision device of the thread scanner probe is used, first, the end of the scanning shaft away from the measuring head is fixedly installed on the output end of the control motor, and the sensor line is electrically connected to the control motor. At this time, the motor is started by the computer control, and the output end of the control motor rotates to drive the scanning shaft to rotate. The rotation of the scanning shaft drives the side head anti-collision fixing seat inside the protective cavity to rotate. The rotation of the side head anti-collision fixing seat drives the side head anti-collision sliding seat to rotate. The side head anti-collision sliding seat drives the sliding round block to rotate. At this time, the rotation of the sliding rod drives the linkage rod at one end of the sliding sleeve to rotate. The rotation of the linkage rod drives the sliding round block 2 at one end of the rotating block to rotate. The rotation of the sliding round block 2 drives the measuring rod to rotate. The rotation of the measuring rod drives the measuring head to rotate. With the pushing action of the electric telescopic rod, the measuring head starts to detect along the thread groove of the workpiece. Such a setting is conducive to the measuring head to smoothly detect the parameters of the thread.

[0018] (3) The present invention sets an anti-collision protection mechanism. When the mechanism works normally, the adsorption force between the strong magnet block 1 and the strong magnet block 2 is much greater than the axial shear force of the measuring head. During the test, the measuring head at one end of the measuring rod hardly moves, which can meet the accuracy requirements of the test profile. At this time, the fixed contact inside the insulating groove at the top of the side head anti-collision fixing seat is tightly attached to the sliding contact inside the insulating block 2, so the corresponding IO port input is continuously closed. At this time, the computer control end detects that the device is operating normally. Such a setting is conducive to ensuring the normal and stable operation of the device.

[0019] (4) The present invention sets a limit mechanism. When the measuring head collides, the sliding pin at the bottom of the side head anti-collision sliding seat slides along the slide groove to the end close to the wire hole. This arrangement is conducive to ensuring that the side head anti-collision sliding seat and the side head anti-collision fixed seat are always located on the same axis, thereby ensuring that the measurement accuracy of the device will not be greatly affected after the collision. At the same time, a plurality of positioning balls squeeze the squeezing spring to shrink into the side head anti-collision sliding seat. When the collision is completed, the sliding pin at the bottom of the side head anti-collision sliding seat is reset along the slide groove under the adsorption force of the strong magnet block 1 and the strong magnet block 2. At this time, a plurality of squeezing springs squeeze the positioning balls back to the inside of a plurality of positioning circular grooves. This arrangement is conducive to ensuring the accurate reset of the side head anti-collision sliding seat. This arrangement is conducive to ensuring that the measurement accuracy of the device always remains in the best state.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention from another viewing angle;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the scanning shaft of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the rotation measuring mechanism of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified view of middle;

[0027] Figure 6 This is a schematic diagram of the structure of the side head anti-collision fixing seat of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the anti-collision protection mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of the partial structure of the anti-collision protection mechanism of the present invention;

[0030] Fig. 9 It is a partial cross-sectional structural schematic diagram of the side head anti-collision sliding seat of the present invention.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] In the figure: 1, scanning shaft; 11, protection cavity; 12, telescopic sliding cavity; 13, measuring rod; 14, measuring head; 15, wire hole; 2, rotating measuring mechanism; 201, side head anti-collision fixing seat; 202, side head anti-collision sliding seat; 203, limiting boss; 3, anti-collision contraction mechanism; 301, sliding round block 1; 302, sliding rod; 303, sliding sleeve; 304, sliding round block 2; 305, connecting column; 306, rotating block; 307, linkage rod; 4, Anti-collision protection mechanism; 401, groove; 402, strong magnet block 1; 403, insulating groove; 404, insulating block 1; 405, wire groove; 406, sensor line; 407, sub-line; 408, fixed contact; 409, strong magnet block 2; 410, insulating block 2; 411, connecting line; 412, sliding contact; 5, limiting mechanism; 501, positioning circular groove; 502, sliding groove; 503, extrusion spring; 504, positioning ball; 505, sliding pin. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1, please refer to Figure 1-Figure 5 As shown, the present invention is an anti-collision device for a thread scanner stylus, comprising a scanning shaft 1, a protective cavity 11 is provided inside the scanning shaft 1, a telescopic sliding cavity 12 is provided at one end of the scanning shaft 1 away from the protective cavity 11, a measuring rod 13 is slidably connected to one end of the scanning shaft 1 close to the telescopic sliding cavity 12, a plurality of measuring heads 14 are fixedly connected to one end of the measuring rod 13 away from the scanning shaft 1, a through hole 15 is provided at the central axis of one end of the scanning shaft 1 away from the measuring rod 13, and further comprising:

[0035] The rotating measuring mechanism 2 includes a side head anti-collision fixing seat 201 fixedly connected to the end of the protective cavity 11 inside the scanning shaft 1 away from the telescopic sliding cavity 12, the end of the side head anti-collision fixing seat 201 away from the through-line hole 15 is set to a semi-cylindrical shape, the interior of the protective cavity 11 is provided with a side head anti-collision sliding seat 202, the end of the side head anti-collision sliding seat 202 close to the through-line hole 15 is set to a semi-cylindrical shape, the side walls of the side head anti-collision fixing seat 201 and the side head anti-collision sliding seat 202 are tightly attached to each other, and a limiting boss 203 is set inside the scanning shaft 1. The sliding seat 202 is rotatably connected to the inner wall of the limiting boss 203. The function of this component is that when the anti-collision device of the threaded scanner probe is used, first the end of the scanning shaft 1 away from the measuring head 14 is fixedly installed on the output end of the control motor, and the sensor line 406 is electrically connected to the control motor. At this time, the start of the motor is controlled by a computer, and the rotation of the output end of the control motor drives the scanning shaft 1 to rotate. The rotation of the scanning shaft 1 drives the side head anti-collision fixing seat 201 inside the protective cavity 11 to rotate, and the rotation of the side head anti-collision fixing seat 201 drives the side head anti-collision sliding seat 202 to rotate.

[0036] An anti-collision retraction mechanism 3 is arranged inside the telescopic sliding cavity 12, and the anti-collision retraction mechanism 3 includes a sliding round block 301 fixedly connected to the end of the side head anti-collision sliding seat 202 away from the side head anti-collision fixed seat 201, and a plurality of sliding rods 302 are fixedly connected to the side of the limiting boss 203 away from the side head anti-collision fixed seat 201, and the sliding round block 301 is slidably connected to the middle part of the plurality of sliding rods 302.

[0037] The anti-collision retracting mechanism 3 also includes a sliding sleeve 303 slidably connected to one end of a rotating sliding rod 302 away from the limiting boss 203 , and the top of the sliding sleeve 303 is in close contact with the bottom of the sliding round block 1 301 .

[0038] The anti-collision retraction mechanism 3 also includes a sliding round block 2 304 fixedly connected to one end of the measuring rod 13 close to the sliding round block 1 301, and a plurality of connecting posts 305 are fixedly connected to the side of the sliding round block 2 304 away from the measuring rod 13, and a rotating block 306 is rotatably connected to the end of the connecting post 305 away from the sliding round block 2 304, and a linkage rod 307 is rotatably connected to the end of the rotating block 306 away from the connecting post 305, and the end of the linkage rod 307 away from the connecting post 305 is rotatably connected to the bottom of the sliding sleeve 303. The function of this component is that when the scanning shaft 1 drives the measuring head 14 on the measuring rod 13 to rotate clockwise, the measuring head When 14 collides with the thread inside the workpiece, the rotation of the measuring head 14 is hindered, and a speed difference is generated between the sliding block 2 304 at one end of the measuring rod 13 and the sliding block 1 301. At this time, the sliding block 2 304 rotates counterclockwise relative to the sliding block 1 301, and the sliding block 2 304 drives the rotating blocks 306 at one end of the connecting columns 305 to rotate. The sliding block 2 304 drives the sliding sleeve 303 at one end of the linkage rod 307 to push the sliding block 1 301 upward along the sliding rod 302, and the sliding block 1 301 moves along the telescopic sliding cavity 12 to one end close to the side head anti-collision sliding seat 202.

[0039] Embodiment 2 is different from Embodiment 1 in that: Figure 1-Figure 9 As shown, an anti-collision protection mechanism 4 is arranged inside the protection cavity 11, a groove 401 is opened directly above the side head anti-collision fixing seat 201, a strong magnet block 402 is arranged inside the groove 401, a plurality of insulating grooves 403 are opened on the top of the side head anti-collision fixing seat 201, and an insulating block 404 is fixedly connected inside the insulating groove 403.

[0040] The anti-collision protection mechanism 4 also includes a wire groove 405 opened inside the side head anti-collision fixing seat 201, and a sensor wire 406 is arranged inside the wire groove 405. The end of the sensor wire 406 away from the side head anti-collision fixing seat 201 is electrically connected to the control motor through the wire hole 15. The end of the sensor wire 406 close to the insulating block 404 is fixedly connected to a plurality of sub-wires 407. The interior of the insulating block 404 is fixedly connected to a fixed contact 408, and the bottom of the fixed contact 408 is fixedly connected to the sub-wire 407.

[0041] The anti-collision protection mechanism 4 also includes a strong magnet block 409 fixedly connected to the inside of the side head anti-collision sliding seat 202, and the strong magnet block 409 is arranged corresponding to the strong magnet block 402. The bottom of the side head anti-collision sliding seat 202 is fixedly connected to a plurality of insulating blocks 410, and the inside of the insulating block 410 is fixedly connected to a sliding contact 412, and the sliding contact 412 is tightly attached to the corresponding fixed contact 408. The end of the sliding contact 412 away from the side head anti-collision fixed seat 201 is fixedly connected to a connecting wire 4 The function of this component is that when a collision occurs, the shear force on the connection part is greater than the adsorption force between the strong magnet block 1 402 and the strong magnet block 2 409. At this time, the sliding round block 1 301 drives the side head anti-collision sliding seat 202 to slide along the protection cavity 11 toward the end close to the wire hole 15, and a relative displacement occurs between the side head anti-collision fixed seat 201 and the side head anti-collision sliding seat 202. At this time, the fixed contact 408 is disconnected from the sliding contact 412. When the computer detects that the corresponding IO port input After the input is disconnected, the control software will execute the collision exception handling program. At this time, all control motor movement operations on the software will be prohibited, and a collision prompt window will pop up. The scanning shaft 1 stops driving the measuring head 14 on the measuring rod 13 to rotate. This setting is conducive to avoiding the measuring head 14 from continuing to rotate and causing a secondary collision, thereby protecting the measuring head 14 from further damage; by setting the anti-collision protection mechanism 4, when the mechanism works normally, the adsorption force between the strong magnet block 1 402 and the strong magnet block 2 409 is much greater than the axial shear force of the measuring head 14. During the test, the measuring head 14 at one end of the measuring rod 13 will hardly move, which can meet the accuracy requirements of the test contour. At this time, the fixed contact 408 inside the insulating groove 403 at the top of the side head anti-collision fixing seat 201 is tightly attached to the sliding contact 412 inside the insulating block 2 410, so the corresponding IO port input is continuously closed. At this time, the computer control end detects that the device is operating normally. This setting is conducive to ensuring the normal and stable operation of the device.

[0042] A limiting mechanism 5 is provided on the top of the side head anti-collision fixing seat 201, and the limiting mechanism 5 includes a plurality of positioning circular grooves 501 opened directly above the side head anti-collision fixing seat 201, a plurality of slide grooves 502 are opened directly above the side head anti-collision fixing seat 201, a plurality of extrusion springs 503 are provided inside the side head anti-collision sliding seat 202, and a positioning ball 504 is provided at the bottom of the extrusion spring 503, and the positioning ball 504 corresponds to the positioning circular groove 501, and a plurality of sliding pins 505 are fixedly connected to the position of the slide groove 502 at the bottom of the side head anti-collision sliding seat 202 corresponding to the position of the slide groove 502, and the end of the sliding pin 505 away from the side head anti-collision sliding seat 202 is slidably connected inside the slide groove 502. The function of this component is to set the limiting mechanism 5, so that when the measuring head 14 collides, the sliding pin 505 at the bottom of the side head anti-collision sliding seat 202 moves along The side head anti-collision sliding seat 202 slides along the slide groove 502 toward the end close to the wire hole 15. This arrangement is conducive to ensuring that the side head anti-collision sliding seat 202 and the side head anti-collision fixed seat 201 are always located on the same axis, thereby ensuring that the measuring accuracy of the device will not be greatly affected after the collision. At the same time, a number of positioning balls 504 squeeze the squeezing spring 503 to shrink into the side head anti-collision sliding seat 202. When the collision is completed, the sliding pin 505 at the bottom of the side head anti-collision sliding seat 202 is reset along the slide groove 502 under the adsorption force of the strong magnet block 1 402 and the strong magnet block 2 409. At this time, a number of squeezing springs 503 squeeze the positioning balls 504 back to the inside of a number of positioning circular grooves 501. This arrangement is conducive to ensuring that the side head anti-collision sliding seat 202 is accurately reset, and this arrangement is conducive to ensuring that the measuring accuracy of the device always remains in the best state.

[0043] A specific application of this embodiment is:

[0044] When the anti-collision device of the thread scanner probe is used, firstly, the end of the scanning shaft 1 away from the measuring head 14 is fixedly installed on the output end of the control motor, and the sensor line 406 is electrically connected to the control motor. At this time, the motor is started by the computer control, and the output end of the control motor rotates to drive the scanning shaft 1 to rotate. The rotation of the scanning shaft 1 drives the side head anti-collision fixing seat 201 inside the protection cavity 11 to rotate. The rotation of the side head anti-collision fixing seat 201 drives the side head anti-collision sliding seat 202 to rotate. The side head anti-collision sliding seat 202 drives the sliding round block 1 301 to rotate. At this time, the rotation of the sliding rod 302 drives the linkage rod 307 at one end of the sliding sleeve 303 to rotate. The rod 307 rotates to drive the sliding round block 2 304 at one end of the rotating block 306 to rotate, and the sliding round block 2 304 rotates to drive the measuring rod 13 to rotate, and the measuring rod 13 rotates to drive the measuring head 14 to rotate. With the pushing action of the electric telescopic rod, the measuring head 14 starts to detect along the thread groove of the workpiece. This arrangement is conducive to the measuring head 14 to smoothly detect the parameters of the thread. By setting the anti-collision contraction mechanism 3, when the scanning shaft 1 drives the measuring head 14 on the measuring rod 13 to rotate clockwise, when the measuring head 14 collides with the thread inside the workpiece, the rotation of the measuring head 14 is hindered, and the sliding round block 2 304 at one end of the measuring rod 13 and the sliding round block 1 30 1, at this time, the sliding round block 2 304 rotates counterclockwise relative to the sliding round block 1 301, the sliding round block 2 304 drives the rotating blocks 306 at one end of the connecting columns 305 to rotate, the sliding round block 2 304 drives the sliding sleeve 303 at one end of the linkage rod 307 to push the sliding round block 1 301 upward along the sliding rod 302, and the sliding round block 1 301 moves along the telescopic sliding cavity 12 to the end close to the side head anti-collision sliding seat 202. When a collision occurs, the shear force on the connecting part is greater than the adsorption force between the strong magnet block 1 402 and the strong magnet block 2 409. At this time, the sliding round block 1 301 drives the side head anti-collision The sliding seat 202 slides along the protection cavity 11 toward the end close to the wire hole 15, and a relative displacement occurs between the side head anti-collision fixed seat 201 and the side head anti-collision sliding seat 202. At this time, the fixed contact 408 is disconnected from the sliding contact 412. When the computer detects that the corresponding IO port input is disconnected, the control software will execute the collision exception processing program. At this time, all control motor movement operations on the software will be prohibited, and a collision prompt window will pop up. The scanning shaft 1 stops driving the measuring head 14 on the measuring rod 13 to rotate. This setting is conducive to avoiding the measuring head 14 from continuing to rotate and causing a secondary collision, thereby protecting the measuring head 14 from further damage;

[0045] By setting up the anti-collision protection mechanism 4, when the mechanism is working normally, the adsorption force between the strong magnet block 1 402 and the strong magnet block 2 409 is much greater than the axial shear force of the measuring head 14. During the test, the measuring head 14 at one end of the measuring rod 13 will hardly be displaced, which can meet the accuracy requirements of the test profile. At this time, the fixed contact 408 inside the insulating groove 403 at the top of the side head anti-collision fixing seat 201 is tightly attached to the sliding contact 412 inside the insulating block 2 410, so the corresponding IO port input is continuously closed. At this time, the computer control end detects that the device is operating normally. This setting is conducive to ensuring the normal and stable operation of the device; by setting up the limit mechanism 5, when the measuring head 14 collides, the sliding pin 505 at the bottom of the side head anti-collision sliding seat 202 moves along the slide groove 502 to approach One end of the wire hole 15 slides, and such an arrangement is conducive to ensuring that the side head anti-collision sliding seat 202 and the side head anti-collision fixed seat 201 are always located on the same axis, thereby ensuring that the measuring accuracy of the device will not be greatly affected after a collision. At the same time, a number of positioning balls 504 squeeze the squeezing spring 503 to shrink toward the inside of the side head anti-collision sliding seat 202. When the collision is completed, the sliding pin 505 at the bottom of the side head anti-collision sliding seat 202 is reset along the slide groove 502 under the adsorption force of the strong magnet block 1 402 and the strong magnet block 2 409. At this time, a number of squeezing springs 503 squeeze the positioning balls 504 back to the inside of a number of positioning circular grooves 501. Such an arrangement is conducive to ensuring that the side head anti-collision sliding seat 202 is accurately reset, and such an arrangement is conducive to ensuring that the measuring accuracy of the device always remains in the best state.

[0046] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An anti-collision device for a thread scanner stylus, comprising a scanning shaft (1), a protective cavity (11) is provided inside the scanning shaft (1), a telescopic sliding cavity (12) is provided at one end of the scanning shaft (1) away from the protective cavity (11), a measuring rod (13) is slidably connected to one end of the scanning shaft (1) close to the telescopic sliding cavity (12), a plurality of measuring heads (14) are fixedly connected to one end of the measuring rod (13) away from the scanning shaft (1), a wire through hole (15) is provided at the center axis of one end of the scanning shaft (1) away from the measuring rod (13), and the device is characterized in that: Also includes: A rotation measuring mechanism (2), the rotation measuring mechanism (2) comprising a side head anti-collision fixing seat (201) fixedly connected to an end of a protective cavity (11) inside a scanning shaft (1) away from a telescopic sliding cavity (12), the end of the side head anti-collision fixing seat (201) away from the wire through hole (15) being arranged in a semi-cylindrical shape, a side head anti-collision sliding seat (202) being arranged inside the protective cavity (11), the end of the side head anti-collision sliding seat (202) being arranged near the wire through hole (15) being arranged in a semi-cylindrical shape, the side walls of the side head anti-collision fixing seat (201) and the side head anti-collision sliding seat (202) being closely attached to each other, a limiting boss (203) being arranged inside the scanning shaft (1), and the side head anti-collision sliding seat (202) being rotatably connected to the inner wall of the limiting boss (203); An anti-collision retracting mechanism (3) is arranged inside the telescopic sliding cavity (12), and the anti-collision retracting mechanism (3) comprises a sliding round block (301) fixedly connected to one end of the side head anti-collision sliding seat (202) away from the side head anti-collision fixed seat (201), and a plurality of sliding rods (302) are fixedly connected to the side of the limiting boss (203) away from the side head anti-collision fixed seat (201), and the sliding round block (301) is slidably connected to the middle of the plurality of sliding rods (302); The anti-collision retracting mechanism (3) also includes a sliding sleeve (303) slidably connected to one end of the rotating sliding rod (302) away from the limiting boss (203), and the top of the sliding sleeve (303) is tightly attached to the bottom of the sliding round block (301); The anti-collision retracting mechanism (3) further comprises a second sliding round block (304) fixedly connected to an end of the measuring rod (13) close to the first sliding round block (301); a plurality of connecting columns (305) are fixedly connected to a side of the second sliding round block (304) away from the measuring rod (13); an end of the connecting column (305) away from the second sliding round block (304) is rotatably connected to a rotating block (306); an end of the rotating block (306) away from the connecting column (305) is rotatably connected to a linkage rod (307); and an end of the linkage rod (307) away from the connecting column (305) is rotatably connected to the bottom of the sliding sleeve (303).

2. The anti-collision device for a thread scanner stylus according to claim 1, characterized in that: An anti-collision protection mechanism (4) is arranged inside the protection cavity (11); a groove (401) is provided directly above the side head anti-collision fixing seat (201); a strong magnet block (402) is arranged inside the groove (401); a plurality of insulating grooves (403) are arranged on the top of the side head anti-collision fixing seat (201); and an insulating block (404) is fixedly connected inside the insulating groove (403).

3. The anti-collision device for a thread scanner stylus according to claim 2, characterized in that: The anti-collision protection mechanism (4) further comprises a wire through groove (405) provided inside the side head anti-collision fixing seat (201); a sensor wire (406) is arranged inside the wire through groove (405); an end of the sensor wire (406) away from the side head anti-collision fixing seat (201) is electrically connected to the control motor through the wire through hole (15); an end of the sensor wire (406) close to the insulating block 1 (404) is fixedly connected to a plurality of sub-wires (407); a fixed contact (408) is fixedly connected inside the insulating block 1 (404); and a bottom of the fixed contact (408) is fixedly connected to the sub-wires (407).

4. The anti-collision device for a thread scanner stylus according to claim 3, characterized in that: The anti-collision protection mechanism (4) also includes a second strong magnet block (409) fixedly connected to the inside of the side head anti-collision sliding seat (202), the second strong magnet block (409) being arranged corresponding to the fixed contact (408), a plurality of second insulating blocks (410) being fixedly connected to the bottom of the side head anti-collision sliding seat (202), a sliding contact (412) being fixedly connected inside the second insulating block (410), the sliding contact (412) being tightly attached to the corresponding fixed contact (408), and a connecting wire (411) being fixedly connected to one end of the sliding contact (412) away from the side head anti-collision fixed seat (201).

5. The anti-collision device for a thread scanner stylus according to claim 4, characterized in that: A limiting mechanism (5) is arranged on the top of the side head anti-collision fixing seat (201), the limiting mechanism (5) comprising a plurality of positioning circular grooves (501) opened directly above the side head anti-collision fixing seat (201), a plurality of slide grooves (502) opened directly above the side head anti-collision fixing seat (201), a plurality of extrusion springs (503) arranged inside the side head anti-collision sliding seat (202), a positioning ball (504) arranged at the bottom of the extrusion spring (503), the positioning ball (504) corresponding to the positioning circular groove (501), a plurality of sliding pins (505) fixedly connected at the bottom of the side head anti-collision sliding seat (202) corresponding to the position of the slide groove (502), and one end of the sliding pin (505) away from the side head anti-collision sliding seat (202) is slidably connected inside the slide groove (502).

Images