A lifting device for a large-mass plug gauge and an online adjustment method thereof

Abstract

The present invention discloses a lifting device for a large-mass plug gauge and an online adjustment method thereof. The lifting device for the large-mass plug gauge comprises a bow-shaped suspension rod, a positive and negative thread stud, a special nut, a nut, a stopper sleeve assembly, a circular ring, a connecting block, and a lifting ring; the bow-shaped suspension rod is divided into three parts, the upper part is an inclined section, and the lower part is a horizontal section; the horizontal section of the bow-shaped suspension rod is a stepped shaft, and a circular ring is arranged on its small diameter section, and the circular ring is arranged in a circular arc ring groove of the inner hole of the plug gauge; the upper section of the inclined section of the bow-shaped suspension rod is a threaded section, and the special nut is screwed on the threaded section through an axial threaded hole, and the lower end of the positive and negative thread stud is connected to the large threaded hole of the special nut, and the upper end is connected to the threaded hole of the connecting block; the threads at both ends of the positive and negative thread stud have opposite rotation directions, one end is left-handed and the other end is right-handed. The present invention can easily realize the adjustment of six degrees of freedom, such as three translations and three rotations, of the large-mass plug gauge, so that the method and technology of plug gauge inspection can be applied in the inspection of hole structures of heavy machinery parts.

Description

Technical Field

[0001] The invention relates to the field of mechanical engineering, and in particular to a hanger for a heavy-duty machinery large-mass plug gauge and an online adjustment method. Background Art

[0002] Plug gauges are inspection tools for hole parts. They are widely used in the machinery industry. There are many forms of them, such as taper plug gauges, thread plug gauges, and integrated spline plug gauges. In non-heavy machinery, they have the advantages of convenient and fast operation, low inspection cost, and good comprehensive inspection effect. Taper plug gauges, thread plug gauges, and integrated spline gauges are irreplaceable or the simplest and most economical inspection tools in some occasions. In light machinery, these plug gauges can be easily used with just a handle, because they are not heavy, and under normal circumstances, human arm strength can flexibly inspect and operate. But heavy machinery is not like this. Its inner hole diameter is large and the hole depth is often hundreds of millimeters. Take the plug gauge with an involute internal spline with a hole diameter of 450mm and a hole depth of 400mm to be inspected as an example. In order to ensure the necessary rigidity and corresponding wall thickness of the plug gauge, even if a weight-reducing hole is set, the mass of the plug gauge is between 250kg and 300kg, which is beyond the physical strength of human beings.

[0003] In particular, in most cases, online measurement is required during the processing process. During online processing, the axis of the hole is mostly horizontal. It is more difficult to insert the plug gauge into the hole of heavy machinery for horizontal detection. Because the plug gauge is heavy, it cannot be moved, let alone held, so there are three difficulties: first, the plug gauge cannot keep the axis horizontal; second, the plug gauge cannot rotate around its axis, or slide the plug gauge to adapt to the red lead powder to detect the taper and contact rate of the tapered hole, or adapt to the screwing in and out of the thread, or the center of the spline tooth top of the plug gauge coincides with the center surface of the spline tooth groove inside the workpiece to be inspected; third, the through gauge cannot be inserted into the hole of the workpiece to be inspected and maintain balance for a long time. Regardless of which plug gauge is used, whether it is a stop gauge or a through gauge, it is necessary to overcome these three difficulties at the same time during use, and it also requires high-precision adjustment.

[0004] If the balancing method of counterweight is adopted, the total weight of the plug gauge and its counterweight will increase by about one time, and the axial length will also increase by about one time. The heavy and large plug gauge will be more inconvenient for online measurement, the machine tool operating space is often insufficient, and it is difficult to realize rotation around the axis.

[0005] In short, when the dimensional tolerance and form and position tolerance of large-sized hole structures in the field of heavy machinery are inspected using tools such as taper plug gauges, thread plug gauges, and integrated spline plug gauges, there is currently no convenient and reliable lifting method and device that can meet the use of such gauges due to the large mass of the plug gauges, let alone online use. This limits the application of the plug gauge acceptance method in the inspection of large-sized hole structures, thereby losing the unique comprehensive inspection effect of taper plug gauges, thread plug gauges, and integrated spline plug gauges. Summary of the invention

[0006] The problem to be solved by the present invention is to provide a lifting device and an online adjustment method for a large-mass plug gauge. The lifting device can easily realize the adjustment of six degrees of freedom, such as three translations and three rotations, of the large-mass plug gauge. When the workpiece is qualified, the through gauge can be conveniently inserted into the workpiece hole to maintain balance, and the stop gauge cannot pass through the precise position of fine adjustment. The taper of the tapered hole and its contact rate can also be checked, so that the plug gauge inspection method and technology can be applied in the inspection of the hole structure of heavy machinery parts. At the same time, the lifting device of the present invention can also realize online detection.

[0007] The invention discloses a lifting device for a large-mass plug gauge, which comprises a bow-shaped suspension rod, a positive and negative thread stud, a special nut, a nut, a stopper sleeve assembly, a circular ring, a connecting block and a suspension ring; the bow-shaped suspension rod is divided into three parts, the upper part is an inclined section, the lower part is a horizontal section, the middle vertical section connects the upper part and the lower part, and the horizontal section is located below the inclined section; the horizontal section of the bow-shaped suspension rod is a stepped shaft, a circular ring is arranged on its small diameter section, the circular ring is arranged in the circular arc ring groove of the inner hole of the plug gauge, and stopper sleeve assemblies are arranged at both ends of the circular ring, the nut is screwed with the thread of the outer section of the small diameter section of the horizontal section of the bow-shaped suspension rod, and the stopper sleeve assemblies are screwed together. The sleeve assembly is pressed against the end face of the circular ring; the upper section of the inclined section of the bow-shaped suspension rod is a threaded section, and the special nut is screwed on the threaded section through an axial threaded hole. A large threaded hole is arranged in the vertical direction of the special nut, and threads are arranged at the corresponding positions of the lower part of the connecting block and the large threaded hole of the special nut. The lower end of the positive and negative thread stud is connected with the large threaded hole of the special nut, and the upper end thereof is connected with the threaded hole of the connecting block; the threads at both ends of the positive and negative thread stud have opposite rotation directions, one end is left-handed and the other end is right-handed; the axial threaded hole and the large threaded hole of the special nut have the same rotation direction; the upper part of the lifting ring is connected with the lifting ring.

[0008] Furthermore, the outer surface of the ring is an arc surface, and the inner hole of the plug gauge is provided with a corresponding inner ring groove. The arc radius R on the arc surface of the ring is 1 The arc radius R of the inner ring groove of the plug gauge 9 2 Equal, or R 1 Slightly smaller than R 2 .

[0009] Furthermore, when the circular ring is hooked into the inner ring groove, the central cross section Q of the inner ring groove coincides with the cross section P through which the center of gravity of the plug gauge passes.

[0010] Furthermore, the inner hole of the circular ring is a circular hole, which is clearance-matched with the small diameter section of the horizontal section of the arched suspension rod.

[0011] Furthermore, the baffle assembly is composed of a plurality of baffles of different lengths.

[0012] Furthermore, the angle between the axis of the large threaded hole in the vertical direction of the special nut and the axis of the axial threaded hole is γ, the angle between the axis of the inclined section and the axis of the horizontal section of the bow-shaped hanger is β, γ+β=90°; the center line L of the positive and negative thread studs coincides or nearly coincides with the central section Q of the inner ring groove.

[0013] Furthermore, the lifting device also includes a pin and a handrail; a light hole is set on the protruding block at the bottom of the connecting block, and a small threaded hole is set in the vertical direction of the special nut. The lower end of the pin is connected to the small threaded hole of the special nut, and its upper end is matched with the light hole; the handrail passes through the horizontal hole of the special nut from front to back; the distance between the center of the light hole and the center of the connecting block screw hole is equal to the distance between the center of the small threaded hole of the special nut and the center of the large threaded hole; the small threaded hole and the large threaded hole of the special nut have the same rotation direction.

[0014] Furthermore, the lifting device also includes a detection auxiliary mechanism, which includes bolts, screws, a lever, and a handle; the lever is connected to the plug gauge through two bolts and is tightly pressed on the end face of the plug gauge, the two screws are located on the outside of the bolts, the screws are screwed into the threaded holes of the lever, and the bottom is pressed on the end face of the workpiece; the handle is connected to the lever through a thread, and its center is aligned with the axis of the plug gauge O 1 coincide.

[0015] The online adjustment method of the lifting device of the large-mass plug gauge of the present invention is as follows: when the large-mass plug gauge is lifted and placed into the inner hole of the workpiece to be inspected, the X and Y coordinates of the plug gauge and the workpiece to be inspected are made consistent by controlling the orientation of the crane and auxiliary push-pull, the crane is controlled for rough adjustment and the positive and negative thread studs are used for fine adjustment to make the height Z coordinate consistent; the plug gauge is controlled by the handle and Coordinates, ensure that the plug gauge is consistent with the axial direction of the workpiece to be inspected, and turn the plug gauge by the lever to make it The coordinates are consistent with the circumferential angle of the workpiece to be inspected or the plug gauge Slide to test the taper and contact ratio.

[0016] Furthermore, the online adjustment method of the present invention is: 1. The X-direction and Y-direction coordinates (horizontal direction) are adjusted mainly by controlling the crane and supplemented by human adjustment, so that the axis line of the plug gauge O 1The X-axis coordinate is consistent with the axis of the structure to be inspected; the Y-axis can be entered by pushing the plug gauge or the lever, and the plug gauge can be pulled out by using the screw to overcome the axial friction; second, the Z-axis coordinate (height direction) is achieved mainly by crane adjustment and supplemented by positive and negative thread stud adjustment: the crane is manually controlled to roughly adjust the upper and lower positions of the plug gauge, with an error within 1mm; then the positive and negative thread studs are adjusted. Both ends of the positive and negative thread studs are positive and negative threads, which can be accurately adjusted to the required height. Note that it can only be adjusted within half a circle or 1mm to avoid safety problems during excessive adjustment; when adjusting, use an open-end wrench to adjust the flat part of the middle of the positive and negative thread studs, and hold the lever to apply the reverse torque of the wrench to prevent the plug gauge from causing abnormal movement due to the wrench torque. Rotate; at the same time, when the wrench turns the positive and negative thread studs, the connecting block remains fixed by the pin, which facilitates fine adjustment of the Z coordinate; 3. The coordinates are automatically balanced by coinciding the center section Q of the inner ring groove with the cross section P through which the center of gravity of the plug gauge passes. During the detection process, a small F3 force can be applied through the handle to make necessary and timely adjustments; IV. The coordinates are adjusted by levers and bolts. When adjusting, forces F1 and F2 are applied to the two ends b and c of the lever respectively, generating a moment M1+M2. The ring rolls under the action of the moment, thereby achieving the plug gauge. The coordinates are consistent with the structure of the workpiece to be inspected, such as the center surface of the tooth top of the plug gauge is aligned with the center surface of the tooth groove of the workpiece to be inspected. If the plug gauge is a tapered plug gauge, this method can be used to reciprocate Apply red lead powder to the cone surface of the rotating matching plug gauge to complete the inspection of the taper and contact rate of the cone hole; 5. The coordinates can be controlled by a lever or a handle to make the axis center line of the plug gauge consistent with the axis center line of the structure to be inspected of the workpiece to be inspected.

[0017] Before lifting: first determine the size of each stopper sleeve in the stopper sleeve assembly according to the position of the inner arc groove of the plug gauge and the length of the plug gauge. Fix the axial position of the ring through the stopper sleeve, nut and the shoulder of the horizontal section of the bow-shaped suspension rod, so that the outer arc of the ring is hooked in the inner ring groove of the plug gauge. At the same time, ensure that there is an appropriate axial space d between the bow-shaped suspension rod and the outer end face of the plug gauge after the plug gauge is hoisted; then adjust the special nut to make the axis L of the positive and negative thread studs coincide or nearly coincide with the central section Q of the ring; then put the hook on the crane through the lifting ring.

[0018] During lifting: the round ring is hooked on the inner ring groove of the plug gauge, and the crane lifts the plug gauge through the lifting ring, so that the plug gauge is inserted into the workpiece to be inspected, thereby realizing online inspection during the processing of large-sized internal cones, internal threads and internal splines of heavy machinery.

[0019] During the inspection, the large-mass plug gauge is hoisted and placed into the inner hole of the workpiece to be inspected. The X and Y coordinates of the plug gauge and the workpiece to be inspected are made consistent by controlling the crane position and auxiliary push-pull. The crane is controlled for rough adjustment and the positive and negative thread studs are used for fine adjustment to make the height Z coordinate consistent. The plug gauge is controlled by the handle and Coordinates, ensure that the plug gauge is consistent with the axial direction of the workpiece to be inspected, and turn the plug gauge by the lever to make it The coordinates are consistent with the circumferential angle of the workpiece to be inspected or the plug gauge Slide to test the taper and contact ratio.

[0020] Therefore, the lifting device of the large-mass plug gauge of the present invention can easily realize the adjustment of the large-mass plug gauge in six degrees of freedom, including three translations and three rotations. When the workpiece is qualified, the through gauge can be conveniently inserted into the workpiece hole to maintain balance. The stop gauge cannot pass through the accurate position of fine adjustment. The taper of the tapered hole and its contact rate can also be checked, so that the method and technology of plug gauge inspection can be applied in the inspection of hole structures of heavy machinery parts. At the same time, the lifting device of the present invention can also realize online detection. Therefore, in the field of heavy machinery, the lifting device of the large-mass plug gauge of the present invention can realize active measurement, so that large-sized internal cones, internal threads, rectangles or involute internal splines can be inspected and controlled online, thereby improving the product qualification rate, reducing the inspection cost, and reducing the difficulty of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0022] Figure 1 is a front view of the lifting device of the present invention;

[0023] Figure 2 It is a right side view of the lifting device of the present invention;

[0024] Figure 3 is along Figure 2 Sectional view along line AA;

[0025] Figure 4 yes Figure 1 Enlarged schematic diagram of point K in the middle. DETAILED DESCRIPTION

[0026] Example 1

[0027] The invention discloses a lifting device for a large-mass plug gauge, which comprises a bow-shaped suspension rod 8, a positive and negative thread stud 5, a special nut 6, a nut 10, a stopper sleeve assembly 11, a circular ring 12, a connecting block 2, and a lifting ring 1; the bow-shaped suspension rod 8 is divided into three parts, the upper part is an inclined section, the lower part is a horizontal section, the middle vertical section connects the upper part and the lower part, and the horizontal section is located below the inclined section; the horizontal section of the bow-shaped suspension rod 8 is a stepped shaft, a circular ring 12 is arranged on its small diameter section, the circular ring 12 is arranged in a circular arc ring groove 15 of the inner hole of the plug gauge 9, the two ends of the circular ring are provided with a stopper sleeve assembly 11, the nut 10 is screwed with the thread of the outer section of the small diameter section of the horizontal section of the bow-shaped suspension rod 8 The upper section of the inclined section of the bow-shaped suspension rod 8 is a threaded section, and the special nut 6 is screwed on the threaded section through an axial threaded hole. A large threaded hole is provided in the vertical direction of the special nut 6, and threads are provided at the corresponding positions of the lower part of the connecting block 2 and the large threaded hole of the special nut 6. The lower end of the positive and negative thread stud 5 is connected to the large threaded hole of the special nut 6, and the upper end thereof is connected to the threaded hole of the connecting block 2; the threads at both ends of the positive and negative thread stud 5 have opposite rotation directions, one end is left-handed and the other end is right-handed; the axial threaded hole and the large threaded hole of the special nut 6 have the same rotation direction; the upper part of the lifting ring 2 is connected to the lifting ring 1.

[0028] During lifting and use, the ring 12 is always in the inner ring groove 15 of the inner hole of the plug gauge 9 to ensure its connection with the plug gauge. At the same time, the nut has an axial blocking effect on the plug gauge to prevent the plug gauge from slipping.

[0029] Example 2

[0030] In the lifting device of the present invention, the outer surface of the ring 12 is an arc surface, the inner hole of the plug gauge 9 is provided with a corresponding inner ring groove 15, and the arc radius R on the arc surface of the ring 12 is 1 The arc radius R of the inner ring groove 15 of the plug gauge 9 2 Equal, or R 1 Slightly smaller than R 2 .

[0031] The radius R of the arc of the ring 12 1 Equal to or slightly smaller than the arc radius R of the inner ring groove 15 2 , which can ensure that the ring is always in the arc groove of the plug gauge, so that the hanger will not be separated from the plug gauge, thereby ensuring the safe use of the plug gauge during the inspection process.

[0032] Example 3

[0033] In the lifting device of the present invention, the inner hole of the circular ring 12 is a circular hole, which is clearance-matched with the small-diameter section of the horizontal section of the arched suspension rod 8.

[0034] The ring 12 and the bow-shaped suspension rod 8 are clearance-matched, and can roll around the horizontal section of the bow-shaped suspension rod 8 with a small rolling resistance, so that the plug gauge can rotate around its own axis O 1 scroll.

[0035] Example 4

[0036] In the lifting device of the present invention: when the circular ring 12 is hooked into the inner ring groove 15, the central section Q of the inner ring groove 15 coincides with the cross section P through which the center of gravity of the plug gauge 9 passes.

[0037] In this way, it can be ensured that the plug gauge can be automatically hoisted horizontally when the arc outside the ring 12 is located inside the arc of the inner ring groove 15. The center of gravity of the plug gauge 9 refers to the center of gravity of the entirety including the parts directly connected to the plug gauge.

[0038] Embodiment 5;

[0039] In the lifting device of the present invention: the stopper sleeve assembly 11 is composed of a plurality of stopper sleeves of different lengths.

[0040] The functions of the stopper sleeve assembly 11 are: 1. The movable special nut is adjusted in coordination with a plurality of stopper sleeves of different lengths so that the axis line L of the positive and negative threaded studs coincides or nearly coincides with the central section Q of the inner ring groove 15, thereby ensuring that the plug gauge is lifted horizontally; 2. The number of stopper sleeves is increased or decreased to adapt to the length of the plug gauge, and the position of the long and short pieces is adjusted so that when the plug gauge is detected to the deepest limit, it can still ensure that the bow-shaped suspension rod and the workpiece 18 have an appropriate spatial dimension d, so that the bow-shaped suspension rod 8 will not touch the workpiece 18 to be inspected.

[0041] Example 6

[0042] In the lifting device of the present invention: the angle between the axis of the large threaded hole in the vertical direction of the special nut 6 and the axis of the axial threaded hole is γ, the angle between the axis of the inclined section and the axis of the horizontal section of the bow-shaped suspension rod 8 is β, γ+β=90°; the axis line L of the positive and negative thread studs 5 coincides or nearly coincides with the central section Q of the inner ring groove 15.

[0043] The two conditions for the horizontal section of the arched boom 8 to keep the axis horizontal during lifting are: γ+β=90°; the axis center line L of the positive and negative threaded stud 5 coincides or nearly coincides with the center section Q of the inner ring groove 15. Among them, by rotating the special nut 6 to move along the threaded section on the inclined section of the arched boom 8, the positive and negative threaded stud 5 connected to the large threaded hole of the special nut 6 is driven to move, so that the axis center line L of the positive and negative threaded stud 5 coincides or nearly coincides with the center section Q of the inner ring groove 15.

[0044] When the axis line L of the positive and negative threaded studs 5 coincides with the central section Q of the inner ring groove 15, the axis line of the horizontal section of the bow-shaped boom is horizontal. During lifting, the center of the arc groove is at the center of gravity of the plug gauge 9. Therefore, during lifting, the axis line L of the positive and negative threaded studs 5 is extended to pass through the center of gravity of the plug gauge 9, thereby ensuring that the lower section of the bow-shaped boom is horizontal.

[0045] When the axis line L of the positive and negative thread studs 5 is close to coinciding with the central section Q of the inner ring groove 15, the axis line of the horizontal section of the bow-shaped boom is close to horizontal. During lifting, because the plug gauge is supported on the outer arc of the circular ring through the inner ring groove, they can rotate freely. Since the central section Q of the inner ring groove 15 is coinciding with the cross section P where the center of gravity of the plug gauge is located, the axis line of the plug gauge is automatically kept horizontal.

[0046] Example 7

[0047] The lifting device of the present invention also includes a pin 4 and a handrail 7; a light hole 3 is set on the protruding block at the bottom of the connecting block 2, and a small threaded hole is set in the vertical direction of the special nut 6. The lower end of the pin 4 is connected to the small threaded hole of the special nut 6, and its upper end is matched with the light hole 3; the handrail 7 passes through the transverse hole of the special nut 5 from front to back; the distance between the center of the light hole 3 and the center of the screw hole of the connecting block 2 is equal to the distance between the center of the small threaded hole of the special nut 6 and the center of the large threaded hole; the small threaded hole and the large threaded hole of the special nut 6 have the same rotation direction.

[0048] The pin 4 connects the connection block 2 with the special nut 6. When the wrench turns the positive and negative thread studs 5, the connection block 2 remains fixed under the action of the pin 4, which facilitates the Z coordinate adjustment. At the same time, the wrench is applied to the hand-held support rod 7 with a reverse torque to prevent the plug gauge from being damaged by the wrench torque. Rotate.

[0049] Example 8

[0050] The lifting device of the present invention also includes a detection auxiliary mechanism, which includes a bolt 14, a screw 16, a lever 17, and a handle 19; the lever 17 is connected to the plug gauge 9 through two bolts 14 and is tightly pressed on the end face of the plug gauge 9, the two screws 16 are located outside the bolts 14, the screws 16 are screwed into the threaded holes of the lever 17, and the bottom is pressed on the end face of the workpiece 18; the handle 19 is connected to the lever 17 through a thread, and its center is aligned with the axis O of the plug gauge 9. 1 coincide.

[0051] The function of the detection auxiliary mechanism is: the bolt 14 connects the lever 17 to the plug gauge 18 to form an integral whole for easy adjustment; the screw 16 can push the plug gauge out when it is difficult to remove; when the plug gauge detects the inner hole of the workpiece, multiple degrees of freedom can be adjusted by adjusting the lever 17 and the handle 19.

[0052] Example 9

[0053] Before lifting: first determine the size of each stopper sleeve in the stopper sleeve assembly 11 according to the position of the inner arc groove of the plug gauge 9 and the length of the plug gauge. The axial position of the ring 12 is fixed by the stopper sleeve, nut 10 and the shoulder of the horizontal section of the bow-shaped suspension rod 8, so that the outer arc of the ring is hooked in the inner ring groove of the plug gauge. At the same time, ensure that after the plug gauge is hoisted, there is an appropriate axial space d between the bow-shaped suspension rod and the outer end face of the plug gauge; then adjust the special nut 6 to make the axis L of the positive and negative thread studs 5 coincide or nearly coincide with the central section Q of the ring 2; then put the hook on the crane through the lifting ring 1.

[0054] During lifting: the ring 12 is hooked on the inner ring groove 15 of the plug gauge, and the crane lifts the plug gauge through the lifting ring, so that the plug gauge 9 is inserted into the workpiece to be inspected 18, thereby realizing online inspection during the processing of large-sized internal cones, internal threads and internal splines of heavy machinery.

[0055] During the processing of the plug gauge 9, the central section Q of the inner ring groove 15 must be ensured to coincide with the cross section P through which the center of gravity of the plug gauge 9 passes. The screwing length of the two ends of the positive and negative thread stud 5 and the special nut and connecting block is more than 10 threads, and is adjusted within half a turn or 1mm to ensure safety.

[0056] During the inspection, the large-mass plug gauge 9 is hoisted and placed into the inner hole of the workpiece 18 to be inspected. The X and Y coordinates of the plug gauge and the workpiece to be inspected are made consistent by controlling the crane position and auxiliary push and pull. The crane is controlled for rough adjustment and the positive and negative thread studs 5 are used for fine adjustment to make the height Z coordinate consistent. The plug gauge is controlled by the handle 19 and Coordinates, ensure that the plug gauge is consistent with the axial direction of the workpiece to be inspected, and turn the plug gauge by lever 17 to make it The coordinates are consistent with the circumferential angle of the workpiece to be inspected or the plug gauge Slide to test the taper and contact ratio.

[0057] That is to say, when the heavy-mass plug gauge 9 is lifted by the bow-shaped suspension rod 8, in order to smoothly put it into the inner hole of the workpiece 18 for testing, the plug gauge must also be fixed in the X, Y, Z, The adjustment problem of six degrees of freedom: 1. The X and Y coordinates (horizontal direction) are adjusted mainly by controlling the crane and supplemented by human adjustment, so that the axis line of the plug gauge O 1The X-axis coordinate of the axis of the structure to be inspected of the workpiece 18 to be inspected is consistent; the Y-axis can be entered by pushing the plug gauge 9 or the lever 17, and the screw 16 can also be used to overcome the axial friction to pull out the plug gauge; second, the Z-axis coordinate (height direction) is achieved mainly by adjusting the crane and supplemented by adjusting the positive and negative thread studs 5: manually control the crane to roughly adjust the upper and lower positions of the plug gauge, with an error within 1mm; then adjust the positive and negative thread studs 5, both ends of which are positive and negative threads, and can be accurately adjusted to the required height. Note that it can only be adjusted within half a circle or 1mm to avoid safety problems during excessive adjustment; when adjusting, use an open-end wrench to adjust the flat part in the middle of the positive and negative thread studs 5, and hold the lever 7 to apply the reverse torque of the wrench to prevent the plug gauge from causing abnormal movement due to the wrench torque. Rotate; at the same time, when the wrench turns the positive and negative thread studs 5, the connecting block 2 remains fixed under the action of the pin 4, which facilitates fine adjustment of the Z coordinate; three, The coordinates are automatically balanced by coinciding the center section Q of the inner ring groove 15 with the cross section P through which the center of gravity of the plug gauge 9 passes. During the detection process, a small F3 force can be applied through the handle 19 to make necessary timely adjustments; IV. The coordinates are adjusted by the lever 17 and the bolt 14. During the adjustment, forces F1 and F2 are applied to the two ends b and c of the lever respectively, generating a moment M1+M2. The ring 12 rolls under the action of the moment, thereby achieving the plug gauge 9. The coordinates are consistent with the structure of the workpiece to be inspected, such as the center surface of the tooth top of the plug gauge is aligned with the center surface of the tooth groove of the workpiece to be inspected. If the plug gauge is a tapered plug gauge, this method can be used to reciprocate Apply red lead powder to the cone surface of the rotating matching plug gauge to complete the inspection of the taper and contact rate of the cone hole; 5. The coordinates can be controlled by the lever 17 or the handle 19 so that the axis of the plug gauge is consistent with the axis of the structure to be inspected of the workpiece 18 to be inspected.

[0058] From the above, it can be seen that the lifting device of the large-mass plug gauge of the present invention can easily realize the adjustment of six degrees of freedom of the large-mass plug gauge, including three translations and three rotations. When the workpiece is qualified, the through gauge can be conveniently inserted into the workpiece hole to maintain balance. The stop gauge cannot pass through the accurate position even when fine-tuned. The taper of the tapered hole and its contact rate can also be checked, so that the method and technology of plug gauge inspection can be applied to the inspection of hole structures of heavy machinery parts, and online detection can be realized.

[0059] The advantages of the lifting device of the large-mass plug gauge of the present invention are: in the field of heavy machinery, the large-mass plug gauge can be horizontally used in the processing process to realize active measurement, so that large-sized internal cones, internal threads, rectangles or involute internal splines can be inspected and controlled online, thereby improving the product qualification rate, reducing the inspection cost and reducing the difficulty of operation.

Claims

1. A lifting device for a large-mass plug gauge, characterized by: It comprises a bow-shaped suspension rod (8), a positive and negative threaded stud (5), a special nut (6), a nut (10), a stopper sleeve assembly (11), a circular ring (12), a connecting block (2), and a suspension ring (1); the bow-shaped suspension rod (8) is divided into three parts, the upper part is an inclined section, the lower part is a horizontal section, the middle vertical section connects the upper part and the lower part, and the horizontal section is located below the inclined section; the horizontal section of the bow-shaped suspension rod (8) is a stepped shaft, and a circular ring (12) is arranged on the small diameter section thereof, and the circular ring (12) is arranged in an inner ring groove (15) of the inner hole of the plug gauge (9) , a stopper sleeve assembly (11) is provided at both ends of the circular ring, the nut (10) is screwed with the thread of the outer section of the small diameter section of the horizontal section of the bow-shaped suspension rod (8), and the stopper sleeve assembly (11) is pressed against the end surface of the circular ring (12); the upper section of the inclined section of the bow-shaped suspension rod (8) is a threaded section, the special nut (6) is screwed on the threaded section through the axial threaded hole, the special nut (6) is provided with a large threaded hole in the vertical direction, the lower part of the connecting block (2) is provided with a thread at a position corresponding to the large threaded hole of the special nut (6), and the positive and negative thread studs (5) are provided with a thread. The lower end is connected to the large threaded hole of the special nut (6), and the upper end is connected to the threaded hole of the connection block (2); the threads of the two ends of the positive and negative thread stud (5) are in opposite directions, one end is left-handed and the other end is right-handed; the axial threaded hole and the large threaded hole of the special nut (6) have the same direction of rotation; the upper part of the connection block (2) is connected to the lifting ring (1); the outer surface of the circular ring (12) is an arc surface, and the inner hole of the plug gauge (9) is provided with a corresponding inner ring groove (15); the arc radius R1 on the arc surface of the circular ring (12) is the same as the inner ring groove (15) of the plug gauge (9). The arc radius R2 is equal, or R1 is slightly smaller than R2; when the circular ring (12) is hooked into the inner ring groove (15), the central section Q of the inner ring groove (15) coincides with the cross section P through which the center of gravity of the plug gauge (9) passes; the angle between the axis of the large threaded hole in the vertical direction of the special nut (6) and the axis of the axial threaded hole is γ, and the angle between the axis of the inclined section and the horizontal section of the bow suspension rod (8) is β, γ+β=90°; the axis L of the positive and negative thread stud (5) coincides with or nearly coincides with the central section Q of the inner ring groove (15).

2. The lifting device according to claim 1, characterized in that: The inner hole of the circular ring (12) is a circular hole, which is clearance-matched with the small-diameter section of the horizontal section of the arched suspension rod (8).

3. The lifting device according to claim 1 is characterized in that: The stopper sleeve assembly (11) is composed of a plurality of stopper sleeves of different lengths.

4. The lifting device according to claim 1 is characterized in that: The lifting device also includes a pin (4) and a handrail (7); a light hole (3) is arranged on the protruding block at the bottom of the connecting block (2); a small threaded hole is arranged in the vertical direction of the special nut (6); the lower end of the pin (4) is connected to the small threaded hole of the special nut (6), and the upper end thereof is matched with the light hole (3); the handrail (7) passes through the transverse hole of the special nut (6) from front to back; the distance between the center of the light hole (3) and the center of the screw hole of the connecting block (2) is equal to the distance between the center of the small threaded hole of the special nut (6) and the center of the large threaded hole; the small threaded hole and the large threaded hole of the special nut (6) have the same rotation direction.

5. The lifting device according to claim 1 is characterized in that: The lifting device also includes a detection auxiliary mechanism, which includes a bolt (14), a screw (16), a lever (17), and a handle (19); the lever (17) is connected to the plug gauge (9) through two bolts (14) and is tightly pressed on the end face of the plug gauge (9); the two screws (16) are located outside the bolts (14); the screws (16) are screwed into the threaded holes of the lever (17), and the bottom is pressed on the end face of the workpiece (18); the handle (19) is connected to the lever (17) through a thread, and its center coincides with the axis O1 of the plug gauge (9).

6. The lifting device according to any one of claims 1 to 5, wherein the online adjustment method is: when lifting the heavy-mass plug gauge (9) and placing it into the inner hole of the workpiece to be inspected (18), the plug gauge is made consistent with the X and Y coordinates of the workpiece to be inspected by controlling the crane position and auxiliary push-pull, the crane is controlled for rough adjustment and the positive and negative thread studs (5) are used for fine adjustment to make the height Z coordinate consistent; the plug gauge is controlled by the handle (19) and Coordinates, ensure that the plug gauge is consistent with the axial direction of the workpiece to be inspected, and turn the plug gauge by the lever (17) to make it The coordinates are consistent with the circumferential angle of the workpiece to be inspected or the plug gauge Slide to test the taper and contact ratio.

7. The online adjustment method of the lifting device according to claim 6 is characterized in that: First, the X-direction and Y-direction coordinates (horizontal direction) are adjusted mainly by controlling the crane and supplemented by human adjustment, so that the axis O1 of the plug gauge (9) is consistent with the X-direction coordinate of the axis of the structure to be inspected of the workpiece (18) to be inspected; the Y-direction can be entered by pushing the plug gauge (9) or the lever (17), and the plug gauge can also be pulled out by using the screw (16) to overcome the axial friction force; Second, the Z-direction coordinate (height direction) is achieved by mainly adjusting the crane and supplemented by adjusting the positive and negative thread stud (5): the upper and lower positions of the plug gauge are roughly adjusted by manually controlling the crane, and the error is within 1mm; then the positive and negative thread stud (5) is adjusted. The two ends of the positive and negative thread stud are positive and negative threads, and can be accurately adjusted to the required height. Note that it can only be adjusted within half a circle or 1mm to avoid safety problems when over-adjusting; when adjusting, use an open-end wrench to tighten the middle flat part of the positive and negative thread stud (5), and hold the lever (7) to apply the reverse torque of the wrench to prevent the plug gauge from abnormally causing the wrench torque. Rotate; at the same time, when the wrench turns the positive and negative thread studs (5), the connecting block (2) remains fixed under the action of the pin (4), which facilitates fine adjustment of the Z coordinate; three, The coordinates are automatically balanced by coinciding the central section Q of the inner ring groove (15) with the cross section P through which the center of gravity of the plug gauge (9) passes. During the detection process, a small F3 force can be applied by the handle (19) to adjust; IV. The coordinates are adjusted by the lever (17) and the bolt (14). During the adjustment, forces F1 and F2 are applied to the two ends b and c of the lever respectively, generating a moment M1+M2. The ring (12) rolls under the action of the moment, thereby achieving the adjustment of the plug gauge (9). The coordinates are consistent with the structure of the workpiece to be inspected, such as the center surface of the tooth top of the plug gauge facing the center surface of the tooth groove of the workpiece to be inspected; if the plug gauge is a tapered plug gauge, this method can be used to reciprocate Apply red lead powder to the cone surface of the rotating matching plug gauge to complete the inspection of the taper and contact rate of the cone hole; 5. The coordinates can be controlled by a lever (17) or a handle (19) so that the axis center line of the plug gauge is consistent with the axis center line of the structure to be inspected of the workpiece (18) to be inspected.

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