A structure and method for measuring spatial angle thread position

Abstract

The present invention discloses a structure and method for measuring the spatial angular thread position. The structure for measuring the spatial angular thread position is used in conjunction with a two-dimensional altimeter to measure the spatial angular thread position of an injector body to be tested. The structure comprises: a base, a floating correction module mounted on the base, a locking device, and a zeroing reference. During measurement, the two-dimensional altimeter is used to mark a point on the zeroing reference plane, the point is set to zero, and the two-dimensional altimeter is moved to mark the point on the small end plane of the injector body to be tested, thereby obtaining a vertical distance dimension Ly from the center of the threaded end face of the injector body to the small end plane of the injector body to be tested; the two-dimensional altimeter is used to mark a point on the reference outer circle, the highest point of the reference outer circle is set to zero, and the two-dimensional altimeter is moved to mark the point on the center point of the axial outer circle of the injector body to be tested, thereby obtaining a transverse distance dimension Lx from the center of the threaded end face of the injector body to the center point of the axial outer circle of the injector body to be tested.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing measurement, and in particular to a structure and a method for measuring a spatial angle thread position. Background Art

[0002] With the development of automotive fuel systems and the continuous upgrading of exhaust emission standards, the emergence of high-pressure common rail systems has led to increasingly complex injector body structures. Threaded holes with spatial angles have become widely used in injector body structures. During production and processing, the position of spatially angled threads needs to be measured, and the most common method is to use three-dimensional coordinate measurement. However, three-dimensional coordinate measurement is inefficient and expensive. This invention improves the efficiency of spatially angled thread position measurement and reduces production costs for enterprises, which has brought significant benefits. Summary of the Invention

[0003] One of the technical problems to be solved by the present invention is to provide a structure that can quickly measure the spatial angle thread position in view of the limitations of the existing spatial angle thread position measurement.

[0004] One of the technical problems to be solved by the present invention is to provide a method for quickly measuring the spatial angle thread position in response to the limitations of existing spatial angle thread position measurements.

[0005] To solve the above technical problems, the present invention provides a structure for measuring the spatial angular thread position. The structure for measuring the spatial angular thread position is used in conjunction with a two-dimensional altimeter to measure the spatial angular thread position of an injector body to be tested, and comprises:

[0006] A base having a bottom reference surface and a side reference surface perpendicular to each other and provided with a floating correction module mounting portion, a locking device mounting portion and a zero reference mounting portion; the bottom reference surface and the side reference surface are respectively used to measure the vertical distance dimension Ly from the center of the threaded end surface of the threaded hole of the nozzle body to be tested to the small end plane of the injector body to be tested, and the horizontal distance dimension Lx from the center of the threaded end surface of the threaded hole of the nozzle body to be tested to the center point of the axial outer circle of the injector body to be tested.

[0007] a floating correction module installed at the floating correction module installation position, the floating correction module contacts the large end surface of the injector body to be tested and adjusts the position of the injector body to be tested through the large end surface;

[0008] a locking device installed at the locking device installation position, wherein the locking device locks the threaded hole of the injector body to be tested and is in close contact with the threaded end surface of the threaded hole;

[0009] A zero reference is installed at the zero reference installation position, and the zero reference has a zero reference surface and a reference outer circle. During measurement, a two-dimensional altimeter is used to mark a point on the zero reference surface, and the point is set to zero. The two-dimensional altimeter is moved to mark the point on the small end plane of the injector body to be tested, so as to obtain the vertical distance dimension Ly from the center of the threaded end face of the injector body to the small end plane of the injector body to be tested; and a two-dimensional altimeter is used to mark a point on the reference outer circle, and the highest point of the reference outer circle is set to zero. The two-dimensional altimeter is moved to mark the point on the center point of the axial outer circle of the injector body to be tested, so as to obtain the transverse distance dimension Lx from the center of the threaded end face of the injector body to the center point of the axial outer circle of the injector body to be tested.

[0010] In a preferred embodiment of the present invention, a first small-diameter hole is provided at the installation portion of the floating correction module, and a limiting screw hole is provided in the radial direction of the axial center position of the first small-diameter hole; the floating correction module includes a floating correction block, a guide sleeve, a spring, and a limiting screw, the guide sleeve is fixed in the first small-diameter hole, and a limiting screw through-hole is provided on the sleeve wall of the guide sleeve; a guide inner hole is provided in the guide sleeve, one end of the spring and the floating correction block is arranged in the guide inner hole, and the spring is located between the top of the guide sleeve and the floating correction block; a radial limiting groove is provided on the floating correction block, the limiting screw is screwed through the limiting screw hole and passed through the limiting screw through-hole and inserted into the limiting groove, so as to limit the axial sliding range of the floating correction block in the guide sleeve; a positioning surface is provided on the end face of the other end of the floating correction block, the positioning surface contacts the large end face of the injector body to be tested and the position of the injector body to be tested is adjusted through the large end face.

[0011] In a preferred embodiment of the present invention, the outer circle of the guide sleeve is interference fit with the first small diameter hole.

[0012] In a preferred embodiment of the present invention, a spring inner hole is provided in the floating correction block, and the spring is arranged in the spring inner hole.

[0013] In a preferred embodiment of the present invention, a first large diameter hole is further provided at the installation portion of the floating correction module. The first large diameter hole is coaxial with the first small diameter hole and is located above the first small diameter hole. The diameter of the first large diameter hole is larger than the diameter of the first small diameter hole and the first large diameter hole and the first small diameter hole form a first stepped hole; the floating correction block also includes a stop block, which is fixed in the first large diameter hole, and the top of the guide sleeve contacts the bottom of the stop block and is limited by the stop block.

[0014] In a preferred embodiment of the present invention, a plurality of first mounting screw holes are evenly distributed circumferentially on the bottom of the first large diameter hole, the axes of these first mounting screw holes are parallel to the axial direction of the first step hole, and first countersunk screw mounting holes are evenly distributed circumferentially on the stopper. A plurality of first countersunk screws are passed through the first countersunk screw mounting holes, screwed into the first mounting screw holes and tightened, so that the stopper is fixed in the first large diameter hole.

[0015] In a preferred embodiment of the present invention, an inclined surface with the same thread angle as that of the injector body to be tested is provided at the installation position of the locking device, and a second large-diameter hole is provided on the inclined surface; the locking device includes a positioning sleeve and a locking screw, the positioning sleeve is arranged in the second large-diameter hole, the locking screw passes through the second large-diameter hole and the inner hole of the positioning sleeve, and the small head of the locking screw extends out of the inner hole of the positioning sleeve, and a first external thread that matches the threaded hole of the injector body to be tested is provided on the small head of the locking screw, the first external thread is screwed into the threaded hole of the injector body to be tested and the end face of the positioning sleeve adjacent to the small head is in close contact with the threaded end face of the threaded hole.

[0016] In a preferred embodiment of the present invention, a second small diameter hole is provided at the installation position of the locking device, the diameter of the second small diameter hole is smaller than the diameter of the second small diameter hole and the outer diameter of the positioning sleeve, and the locking screw passes through the second small diameter hole and the inner hole of the positioning sleeve in sequence; the second large diameter hole and the second small diameter hole constitute a second stepped hole.

[0017] In a preferred embodiment of the present invention, a first mounting surface and a second mounting surface parallel to the first mounting surface are provided at the zeroing reference mounting portion, and a second mounting screw hole and a third mounting screw hole are respectively provided on the first mounting surface and the second mounting surface; the zeroing reference includes a reference alignment block, a reference alignment sleeve and a positioning screw, the zeroing reference surface is arranged on the end surface of one end of the reference alignment block, and the zeroing reference surface is parallel to the first mounting surface; a second countersunk screw mounting hole is provided in the reference alignment block, and a second countersunk screw is passed through the second countersunk screw mounting hole and screwed into the second mounting screw hole, so that the reference alignment block is fixed on the first mounting surface; the reference outer circle is arranged on the outer circle of the reference alignment sleeve, and a reference alignment sleeve inner hole is provided in the reference alignment sleeve, and the positioning screw is passed through the reference alignment sleeve inner hole and screwed into the third mounting screw hole, so that the reference alignment sleeve is fixed on the second mounting surface.

[0018] In a preferred embodiment of the present invention, a positioning pin hole is provided on the upper portion of the third mounting screw hole; the small head of the positioning screw has a three-step outer circle, wherein the first-step outer circle passes through and cooperates with the inner hole of the reference alignment sleeve, the second-step outer circle passes through and cooperates with the positioning pin hole, and a second external thread is provided on the third-step outer circle, and the second external thread is screwed into the third mounting screw hole.

[0019] In a preferred embodiment of the present invention, the edge lines of the zero reference surface and the reference outer circle coincide with the center of the end surface of the positioning sleeve of the locking device adjacent to the small head.

[0020] The present invention also provides a method for quickly measuring the position of a threaded screw at a spatial angle. In the method, a structural component for measuring the position of a threaded screw at a spatial angle is used, comprising a base, a floating correction module, a locking device, and a zeroing reference. The floating correction module, the locking device, and the zeroing reference are mounted on the base, and the zeroing reference surface of the reference alignment block in the zeroing reference is made to coincide with the center of the end face of the positioning sleeve in the locking device adjacent to the small head portion, and the reference outer circular edge line of the reference alignment sleeve in the zeroing reference is made to coincide with the center of the end face of the positioning sleeve in the locking device adjacent to the small head portion. The method comprises the following steps:

[0021] Step 1: Place the bottom reference surface of the base on a horizontal workbench, place the large end surface of the injector body to be tested on the positioning surface of the floating correction block, press the injector body to be tested downward so that the threaded end surface of the threaded hole of the injector body to be tested is close to the end surface of the positioning sleeve of the locking device adjacent to the small head of the locking screw in the locking device, screw the locking screw in the locking device into the threaded hole of the injector body to be tested and tighten it so that the threaded end surface of the threaded hole of the injector body to be tested is closely fitted with the end surface of the positioning sleeve of the locking device adjacent to the small head of the locking screw in the locking device;

[0022] Step 2: Use a two-dimensional altimeter to mark a point on the zero reference surface of the reference alignment block, set this point at zero, move the two-dimensional altimeter to mark the point on the small end plane of the injector body to be tested, and obtain the vertical distance dimension Ly from the center of the threaded end surface of the threaded hole of the injector body to the small end plane of the injector body to be tested;

[0023] Step 4, placing the side reference surface of the base on a horizontal workbench;

[0024] Step 5: Use a two-dimensional altimeter to mark the reference outer circle of the reference alignment sleeve, set the highest point of the reference outer circle to zero, and move the two-dimensional altimeter to mark the center point of the axial outer circle of the injector body to be tested. The lateral distance Lx from the center of the threaded end face of the threaded hole of the injector body to the center point of the axial outer circle of the injector body to be tested can be obtained.

[0025] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. Through this structural component and measurement method, combined with a two-dimensional altimeter, the position of the spatial angle thread can be quickly measured, reducing the measurement cost of enterprise processing and shortening the product production cycle.

[0027] 2. This structural component can be placed on the product production line, and can perform real-time online testing of the product to ensure the quality of product processing.

[0028] 3. The measuring component has a simple structure, convenient and reliable measurement, and is easy to use and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a structural diagram of the injector body to be tested.

[0031] Figure 2 It is a structural schematic diagram of the present invention for measuring the spatial angle thread position.

[0032] Figure 3 for Figure 2 A-direction view.

[0033] Figure 4 for Figure 3 BB cross-sectional view. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0035] See also Figure 2 The structure for measuring the spatial angle thread position shown in the figure includes a base 100, a floating correction module 200, a locking device 300, and a zero reference 400.

[0036] The base 100 comprises a floating calibration module mounting portion 110, a locking device mounting portion 120, a zero reference mounting portion 130, a bottom reference surface 140, and a side reference surface 150. Bottom reference surface 140 and side reference surface 150 are used to measure the vertical distance Ly from the center of the threaded end surface 1c of the threaded hole 1b of the nozzle body 1 to the small end surface 1d of the injector body 1 under test, and the horizontal distance Lx from the center of the threaded end surface 1c of the threaded hole 1b of the nozzle body 1 under test to the center point 1e of the axial outer circle of the injector body 1 under test, respectively.

[0037] A stepped hole 111 (the aforementioned first stepped hole) is provided at the floating correction module mounting portion 100. The stepped hole 111 is composed of a coaxial first large diameter hole and a first small diameter hole. The first small diameter hole is located above the first large diameter hole, and the diameter of the first small diameter hole is smaller than the diameter of the first large diameter hole.

[0038] Three mounting screw holes 112 (the aforementioned first mounting screw holes) are evenly distributed circumferentially around the bottom of the first large-diameter hole. The axes of these three mounting screw holes 112 are parallel to the axis of the stepped hole 111. Stepped hole 111 is used to mount the guide sleeve 220 and stopper 240 in the floating correction module 200. A stop screw hole 113 is located radially in the center of the first large-diameter hole for mounting a stop screw 250.

[0039] The floating correction module 200 is composed of a floating correction block 210, a guide sleeve 220, a spring 230, a stopper 240, a limit screw 250, and a mounting screw 260 (the aforementioned first countersunk screw). The guide sleeve 220 has a guide inner hole 221 that matches the floating correction block 210 and an outer circle 222 that is interference-fitted with the first small-diameter hole of the base 100.

[0040] The outer circle 222 of the guide sleeve 220 is interference-fitted with the first small-diameter hole, so that the guide sleeve 220 is fixed in the first small-diameter hole of the base 100. A limit screw through-hole 223 is provided on the sleeve wall of the guide sleeve 220.

[0041] The floating correction block 210 has an outer circle 211 that cooperates with the guide inner hole 221 of the guide sleeve 220, so that the floating correction block 210 can slide up and down in the guide inner hole 221 of the guide sleeve 220. A limiting groove 212 is opened on the side of the floating correction block 210 to limit the sliding range of the floating correction block 210. A spring inner hole 213 is opened in the axial center of the floating correction block 210. The spring 230 and one end of the outer circle 211 of the floating correction block 210 are arranged in the guide inner hole 221. The spring 230 is arranged in the spring inner hole 213 and is located between the top of the guide sleeve 220 and the floating correction block 210.

[0042] The limiting screw 250 is screwed through the limiting screw hole 113 and passes through the limiting screw through-hole 223 to be inserted into the limiting groove 212 to limit the axial sliding range of the floating correction block 210 in the guide sleeve 220 .

[0043] A positioning surface 214 is provided on the end surface of the other end of the floating correction block 210. The positioning surface 214 contacts the large end surface 1a of the injector body 1 to be tested and adjusts the position of the injector body 1 to be tested through the large end surface 1a.

[0044] Three countersunk screw mounting holes 241 (the aforementioned first countersunk screw mounting holes) are evenly distributed around the block 240. Three mounting screws 260 are passed through the countersunk screw mounting holes 241 and screwed into the mounting screw holes 112 and tightened, so that the block 240 is fixed in the first large diameter hole, and the top of the guide sleeve 220 contacts the bottom of the block 240 and is limited by the block 240.

[0045] The locking device mounting portion 120 has an inclined surface 121 with the same angle as the thread 1b of the injector body 1 to be tested. A second large-diameter hole is formed on the inclined surface 121. The locking device mounting portion 120 also has a second small-diameter hole. The diameter of the second small-diameter hole is smaller than the diameter of the second small-diameter hole and the outer diameter of the positioning sleeve 310. The second large-diameter hole and the second small-diameter hole form a second stepped hole 122 for mounting the positioning sleeve 310 and the locking screw 320.

[0046] The locking device 300 is composed of a positioning sleeve 310 and a locking screw 320. The positioning sleeve 310 has an outer circle 311 that matches the stepped hole 122 on the base 100, and an inner hole 312 that matches the locking screw 320; the locking screw 320 has an outer circle 321 that matches the positioning sleeve 310, and the small head of the locking screw 320 has an external thread 322 (the aforementioned first external thread) that is slightly smaller than the outer circle 321.

[0047] The locating sleeve 310 is arranged in the second large-diameter hole, and the locking screw 320 passes through the second small-diameter hole and the inner hole 312 of the locating sleeve 310 in sequence, so that the small head of the locking screw 320 extends out of the inner hole 312 of the locating sleeve 310, and the external thread 322 is screwed into the threaded hole 1b of the injector body 1 to be tested, so that the end face of the locating sleeve 310 adjacent to the small head is in close contact with the threaded end face 1c of the threaded hole 1b.

[0048] The zero reference mounting portion 130 has two mounting surfaces 131 (the aforementioned first mounting surface) and a mounting surface 132 (the aforementioned second mounting surface) parallel to the bottom reference surface 140. Mounting screw holes 133 (the aforementioned second mounting screw holes) and mounting screw holes 134 (the aforementioned third mounting screw holes) are respectively provided on the first mounting surface 131 and the second mounting surface 132 for mounting the reference alignment block 410 and the reference alignment sleeve 420; a positioning pin hole 135 is provided on the upper part of the mounting screw hole 134 for mounting and positioning the reference alignment sleeve 420.

[0049] The zeroing reference 400 is composed of a reference alignment block 410, a reference alignment sleeve 420, and a positioning screw 430. The reference alignment block 410 has a zeroing reference surface 411 parallel to the mounting surface 131. The zeroing reference surface 411 is arranged on the end surface of one end of the reference alignment block 410 and is used to measure the vertical position of the threaded hole 1b of the injector body 1 to be tested to set the zeroing reference. A countersunk screw mounting hole 412 (the aforementioned second countersunk screw mounting hole) is provided at the center of the reference alignment block 410 for screw 440 (the aforementioned second countersunk screw) to mount and fix the reference alignment block 410; a screw 440 is passed through the countersunk screw mounting hole 412 and screwed into the mounting screw hole 133, so that the reference alignment block 410 is fixed to the first mounting surface 131.

[0050] The reference alignment sleeve 420 has a reference outer circle 421, which is arranged on the outer circle of the reference alignment sleeve 420 and is used to measure the lateral position of the threaded hole of the injector body 1 to be tested and set the zero reference. In the center of the reference alignment sleeve 420, there is a reference alignment sleeve inner hole 422 that cooperates with the positioning screw 430 and is used for installation and positioning of the reference alignment sleeve 420.

[0051] The small head of the positioning screw 430 has three-step outer circles 431, 432, and 433, among which the first step outer circle 431 and the second step outer circle 432 respectively cooperate with the reference alignment sleeve inner hole 422 and the positioning pin hole 135 of the base 100 and the reference alignment sleeve inner hole 422 of the reference alignment sleeve 420 and the positioning pin hole 135 of the base 100. A second outer thread threadedly connected to the mounting screw hole 134 is provided on the third step outer circle 433. The positioning screw 430 passes through the reference alignment sleeve inner hole 422 and is screwed into the mounting screw hole 134, so that the reference alignment sleeve 420 is fixed on the mounting surface 132.

[0052] The edges of the zero reference surface 411 and the reference outer circle 421 both coincide with the center of the end surface of the end of the positioning sleeve 310 of the locking device 300 adjacent to the small head.

[0053] When the structure for measuring the spatial angle thread position is used to measure the vertical distance Ly from the center of the threaded end face 1c of the threaded hole 1b of the nozzle body 1 to be tested to the small end plane 1d of the injector body 1 to be tested, and the horizontal distance Lx from the center of the threaded end face 1c of the threaded hole 1b of the nozzle body 1 to be tested to the center point 1e of the axial outer circle of the injector body 1 to be tested, the following steps are included:

[0054] Step 1: Place the bottom reference surface 140 of the base 100 on a horizontal workbench, place the large end surface 1a of the injector body 1 to be tested on the positioning surface 214 of the floating correction block 210, press the injector body 1 to be tested, so that the threaded end surface 1c of the threaded hole 1b of the injector body 1 to be tested and the end surface of the positioning sleeve 310 of the locking device 300 adjacent to the small head of the locking screw 320 in the locking device 300 are close to each other, screw the locking screw 320 in the locking device 300 into the threaded hole 1b of the injector body 1 to be tested and tighten it, so that the threaded end surface 1c of the threaded hole 1b of the injector body 1 to be tested and the end surface of the positioning sleeve 320 of the locking device 300 adjacent to the small head of the locking screw in the locking device are closely fitted;

[0055] Step 2: Use a two-dimensional altimeter to mark a point on the zero reference surface 411 of the reference alignment block 410, set this point at zero, and move the two-dimensional altimeter to mark the point on the small end plane 1d of the injector body 1 to be tested. This will determine the vertical distance Ly from the center of the threaded end surface 1c of the threaded hole 1b of the injector body 1 to the small end plane 1d of the injector body 1 to be tested.

[0056] Step 4: Place the side reference surface 150 of the base 100 on a horizontal workbench;

[0057] Step 5: Use a two-dimensional altimeter to mark a point on the reference outer circle 421 of the reference alignment sleeve 420, set the highest point of the reference outer circle 421 to zero, and move the two-dimensional altimeter to mark a point on the center point 1e of the axial outer circle of the injector body 1 to be tested. The lateral distance Lx from the center of the threaded end face 1c of the threaded hole 1b of the injector body 1 to the center point 1e of the axial outer circle of the injector body 1 to be tested can be obtained.

[0058] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the spatial angle thread position, said device for measuring the spatial angle thread position being used in conjunction with a two-dimensional altimeter for measuring the spatial angle thread position of an injector body to be tested, characterized in that: include: a base having a bottom reference surface and a side reference surface perpendicular to each other and provided with a floating correction module mounting portion, a locking device mounting portion, and a zero reference mounting portion; the bottom reference surface and the side reference surface are respectively used to measure a vertical distance dimension Ly from the center of the threaded end surface of the threaded hole of the nozzle body to be tested to the small end plane of the injector body to be tested, and a horizontal distance dimension Lx from the center of the threaded end surface of the threaded hole of the nozzle body to be tested to the center point of the axial outer circle of the injector body to be tested; a floating correction module installed at the floating correction module installation position, the floating correction module being in contact with the large end surface of the injector body to be tested and adjusting the position of the injector body to be tested via the large end surface; a locking device installed at the locking device installation position, wherein the locking device locks the threaded hole of the injector body to be tested and is in close contact with the threaded end surface of the threaded hole; A zero reference installed at the zero reference installation portion, wherein the zero reference has a zero reference surface and a reference outer circle; A first small-diameter hole is provided at the mounting portion of the floating correction module, and a limiting screw hole is provided in the radial direction of the axial center position of the first small-diameter hole; the floating correction module comprises a floating correction block, a guide sleeve, a spring, and a limiting screw, the guide sleeve being fixed in the first small-diameter hole, and a limiting screw through-hole is provided on the sleeve wall of the guide sleeve; a guide inner hole is provided in the guide sleeve, one end of the spring and the floating correction block is arranged in the guide inner hole, and the spring is located between the top of the guide sleeve and the floating correction block; a radial limiting groove is provided on the floating correction block, the limiting screw is screwed through the limiting screw hole and passed through the limiting screw through-hole and inserted into the limiting groove, so as to limit the axial sliding range of the floating correction block in the guide sleeve; a positioning surface is provided on the end face of the other end of the floating correction block, which is in contact with the large end face of the injector body to be tested and the position of the injector body to be tested is adjusted through the large end face; An inclined surface with the same thread angle as that of the injector body to be tested is provided at the mounting portion of the locking device, and a second large-diameter hole is formed on the inclined surface; the locking device comprises a positioning sleeve and a locking screw, the positioning sleeve is disposed in the second large-diameter hole, the locking screw passes through the second large-diameter hole and the inner hole of the positioning sleeve, and the small head of the locking screw extends out of the inner hole of the positioning sleeve, a first external thread is provided on the small head of the locking screw that matches the threaded hole of the injector body to be tested, the first external thread is screwed into the threaded hole of the injector body to be tested, and an end face of the positioning sleeve adjacent to the small head is in close contact with a threaded end face of the threaded hole; A first mounting surface and a second mounting surface parallel to the bottom reference surface are provided at the zeroing reference mounting portion, and a second mounting screw hole and a third mounting screw hole are respectively provided on the first mounting surface and the second mounting surface; the zeroing reference comprises a reference alignment block, a reference alignment sleeve and a positioning screw, the zeroing reference surface is arranged on an end surface of one end of the reference alignment block, and the zeroing reference surface is parallel to the first mounting surface; a second countersunk screw mounting hole is provided in the reference alignment block, and a second countersunk screw is passed through the second countersunk screw mounting hole and screwed into the second mounting screw hole, so that the reference alignment block is fixed to the first mounting surface; the reference outer circle is arranged on the outer circle of the reference alignment sleeve, and a reference alignment sleeve inner hole is provided in the reference alignment sleeve, and the positioning screw passes through the reference alignment sleeve inner hole and is screwed into the third mounting screw hole, so that the reference alignment sleeve is fixed to the second mounting surface; The edge lines of the zeroing reference surface and the reference outer circle both coincide with the center of the end surface of the positioning sleeve of the locking device adjacent to the small head.

2. A device for measuring spatial angle thread position according to claim 1, characterized in that: The outer circle of the guide sleeve is interference fit with the first small diameter hole.

3. The device for measuring the spatial angle thread position according to claim 2, characterized in that: A spring inner hole is provided in the floating correction block, and the spring is arranged in the spring inner hole.

4. The device for measuring the spatial angle thread position according to claim 3, characterized in that: A first large diameter hole is also provided at the installation portion of the floating correction module. The first large diameter hole is coaxial with the first small diameter hole and is located above the first small diameter hole. The diameter of the first large diameter hole is larger than the diameter of the first small diameter hole and the first large diameter hole and the first small diameter hole form a first stepped hole; the floating correction block also includes a stop block, which is fixed in the first large diameter hole, and the top of the guide sleeve contacts the bottom of the stop block and is limited by the stop block.

5. The device for measuring the spatial angle thread position according to claim 4, characterized in that: A plurality of first mounting screw holes are evenly distributed circumferentially at the bottom of the first large-diameter hole, and the axes of these first mounting screw holes are parallel to the axial direction of the first step hole. First countersunk screw mounting holes are evenly distributed circumferentially on the stopper, and a plurality of first countersunk screws are passed through the first countersunk screw mounting holes, screwed into the first mounting screw holes and tightened, so that the stopper is fixed in the first large-diameter hole.

6. The device for measuring the spatial angle thread position according to claim 5, characterized in that: A second small diameter hole is provided at the installation position of the locking device. The diameter of the second small diameter hole is smaller than the diameter of the second small diameter hole and the outer diameter of the positioning sleeve. The locking screw passes through the second small diameter hole and the inner hole of the positioning sleeve in sequence; the second large diameter hole and the second small diameter hole form a second stepped hole.

7. The device for measuring the spatial angle thread position according to claim 6, characterized in that: A positioning pin hole is provided on the upper part of the third mounting screw hole; the small head of the positioning screw has a three-step outer circle, wherein the first-step outer circle passes through the inner hole of the reference alignment sleeve and cooperates therewith, the second-step outer circle passes through the positioning pin hole and cooperates therewith, and a second external thread is provided on the third-step outer circle, and the second external thread is screwed into the third mounting screw hole.

8. A method for quickly measuring the position of a thread at a spatial angle, wherein the method uses a device for measuring the position of a thread at a spatial angle as claimed in claim 1, characterized in that: The method comprises the following steps: Step 1: Place the bottom reference surface of the base on a horizontal workbench, place the large end surface of the injector body to be tested on the positioning surface of the floating correction block, press the injector body to be tested downward so that the threaded end surface of the threaded hole of the injector body to be tested is close to the end surface of the positioning sleeve of the locking device adjacent to the small head of the locking screw in the locking device, screw the locking screw in the locking device into the threaded hole of the injector body to be tested and tighten it so that the threaded end surface of the threaded hole of the injector body to be tested is closely fitted with the end surface of the positioning sleeve of the locking device adjacent to the small head of the locking screw in the locking device; Step 2: Use a two-dimensional altimeter to mark a point on the zero reference surface of the reference alignment block, set this point at zero, move the two-dimensional altimeter to mark the point on the small end plane of the injector body to be tested, and obtain the vertical distance dimension Ly from the center of the threaded end surface of the threaded hole of the injector body to the small end plane of the injector body to be tested; Step 4, placing the side reference surface of the base on a horizontal workbench; Step 5: Use a two-dimensional altimeter to mark the reference outer circle of the reference alignment sleeve, set the highest point of the reference outer circle to zero, and move the two-dimensional altimeter to mark the center point of the axial outer circle of the injector body to be tested. The lateral distance Lx from the center of the threaded end face of the threaded hole of the injector body to the center point of the axial outer circle of the injector body to be tested can be obtained.

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