A tool for quickly detecting the position degree of an inner hole

Abstract

The application discloses a kind of fast detection inner hole position degree tool, including base, a pair of rotation in base on support cylinder, drive two support cylinder rotation drive component one, three are sequentially set in base on positioning bracket one, detection bracket and positioning bracket two, two pairs of sliding in positioning bracket one and positioning bracket two on slider one and slider two, a pair of two ends respectively hinged two slider one and two slider two connecting rod one, fixed detection bracket one side and rotation and pass out two connecting rod one intersection center hinged shaft, drive positioning bracket one lifting sliding drive component two, drive two slider one mutually close and drive component three, a pair of respectively rotation connection positioning bracket one and positioning bracket two and up-down symmetry positioning component, sliding setting in detection bracket and being located in two positioning components middle position degree detection component, adjusting control position degree detection component sliding adjusting component.The application has the effects of good universality, flexible and convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts detection, and particularly relates to a rapid detection tool for inner hole position degree. BACKGROUND

[0002] In the manufacturing process of existing automobile parts, precision is an important guarantee for automobile safety. At present, the size tolerance and position degree of the inner hole of automobile parts such as columns or sleeves need to be detected. Since the position degree refers to the distance tolerance between the center axis of the hole and the reference axis, various positioning structures are usually used when measuring the position degree of the inner hole. First, the reference axis of the part is positioned, and then a dial gauge or other measuring tool is used to measure the distance between the center axis of the inner hole and the reference axis. However, the positioning structure is relatively complex in the setting and debugging process, so it can only be used for positioning and detection of one type or size of parts. This not only makes the inner hole position degree detection device less versatile, but also causes the measuring accuracy to decrease rapidly and the entire detection device to be scrapped in the long-term use process due to wear of the parts in the positioning structure. SUMMARY

[0003] The purpose of the present application is to provide a rapid detection tool for inner hole position degree, which has good versatility and is flexible and convenient to use.

[0004] The above technical purpose of the present application is achieved by the following technical solution: a rapid detection tool for inner hole position degree, comprising a base, a pair of support rollers arranged horizontally and parallel to each other on the base, a driving assembly one for driving the two support rollers to rotate synchronously, a positioning support one and a positioning support two arranged horizontally and vertically on the base, a detection support arranged horizontally and vertically on the base and parallel to the positioning support one and the positioning support two, a pair of sliding blocks one respectively sliding on the positioning support one, a pair of sliding blocks two respectively sliding on the positioning support two, a pair of connecting rods one intersecting each other and having two ends respectively hinged to the two sliding blocks one and the two sliding blocks two, a hinge shaft fixed to one side of the detection support and rotating through the intersection center of the two connecting rods one, a driving assembly two for driving the positioning support one to slide vertically, a driving assembly three for driving the two sliding blocks one to move closer to or away from each other, a pair of positioning assemblies respectively rotatingly connected to the positioning support one and the positioning support two and symmetrically arranged vertically, a position degree detection assembly sliding on the detection support and located between the two positioning assemblies, and an adjusting assembly for adjusting the sliding of the position degree detection assembly. The positioning end of the positioning assembly and the measuring end of the position degree detection assembly are located on the symmetry line between the two support rollers, and the positioning end of the positioning assembly abuts against the outer contour surface of the part, and the measuring end of the position degree detection assembly abuts against the inner wall of the inner hole of the part.

[0005] By adopting the above technical scheme, when the inner hole of the part needs to be measured, first, the part is horizontally placed on the two supporting rollers, and the driving assembly two is used to drive the positioning support one to lift, so that the positioning end of the positioning assembly on the positioning support one abuts against the lower end of the outer contour surface of the part, then the driving assembly three is used to drive the two sliders one on the positioning support one to move away from each other, since the two sliders one on the positioning support one and the two sliders two of the positioning support two are jointly connected by the two connecting rods, and the hinge shaft on the detection support one side rotates through the intersection center of the two connecting rods, therefore, in the sliding process of the two sliders one, the positioning support two and the detection support will simultaneously move towards the direction of the positioning support one, and respectively make the positioning end of the positioning assembly on the positioning support two abut against the upper end of the outer contour surface of the part, and the position detection assembly on the detection support is located at the axial position of the outer contour surface of the part, then the adjusting assembly is used to control the sliding of the position detection assembly, so that the measurement end thereof extends into the inner hole of the part and abuts against the inner wall of the inner hole of the part, finally, the driving assembly one is used to drive the two supporting rollers to rotate synchronously, so that the part placed on the two supporting rollers rotates in place, and the measurement end of the position detection assembly will relatively move along the inner wall of the inner hole of the part, thereby measuring the distance between the axial position of the outer contour surface of the part and the axial position of the inner hole thereof, and obtaining the position degree of the inner hole of the part.

[0006] Further, the base is fixedly provided with a support seat one at each end of the supporting roller, and the supporting roller is fixedly connected with a rotating shaft one rotating through the support seat one.

[0007] By adopting the above technical scheme, the stable rotation of the supporting roller can be ensured.

[0008] Further, the driving assembly one comprises a rotating shaft two rotating on the base and parallel to the middle of the two supporting rollers, a toothed belt wheel one fixed on the rotating shaft two, a pair of toothed belt wheels two fixed on the rotating shaft one of the two support seats, and a toothed belt sleeved on the toothed belt wheel one and the toothed belt wheel two, wherein the belt groove width of the toothed belt wheel one is equal to the sum of the belt groove widths of the two toothed belt wheels two, the two toothed belt wheels two are staggered with the toothed belt, and the two toothed belts share the same toothed belt wheel one.

[0009] By adopting the above technical scheme, when the two supporting rollers need to be driven to rotate synchronously, first, the knob one is manually twisted to drive the rotating shaft two and the toothed belt wheel one to rotate, then the two toothed belts sleeved on the toothed belt wheel one and the toothed belt wheel two will transmit the rotation of the toothed belt wheel one to the two toothed belt wheels two, and finally the rotating shaft one and the supporting roller will rotate synchronously under the driving of the two toothed belt wheels two.

[0010] The further arrangement of the present application is that the driving assembly two comprises a rotating guide rod one vertically arranged on the base and penetrating through the positioning support one, a fixed guide rod two vertically arranged on the base and penetrating through the positioning support two, an external thread one opened on the side wall of the rotating guide rod one, a nut one threadedly connected with the external thread one and fixedly connected with the positioning support one, and a hand crank one fixedly arranged on the top end of the rotating guide rod one.

[0011] By using the above technical scheme, when the positioning support one needs to be driven to lift, the hand crank one is manually rotated to rotate the rotating guide rod one on the base, since the rotating guide rod one and the fixed guide rod one penetrate through the positioning support one respectively, and the nut one on the positioning support one is threadedly connected with the rotating guide rod one, thus under the rotation of the rotating guide rod one, the nut one will drive the positioning support one to slide up and down along the rotating guide rod one and the fixed guide rod one, so as to realize the up and down lifting of the positioning support one.

[0012] The further arrangement of the present application is that the rotating guide rod one and the fixed guide rod one also penetrate through the detection support and the positioning support two, the fixed guide rod one is fixedly arranged with a height limiting plate, one end of the rotating guide rod one penetrates through the height limiting plate and is fixedly connected with the hand crank one.

[0013] By using the above technical scheme, the detection support and the positioning support two can be stably lifted up and down with the positioning support one.

[0014] The further arrangement of the present application is that the driving assembly three comprises a rotating guide rod two horizontally arranged on the positioning support one and penetrating through the two sliding blocks one, two sections of external threads two symmetrically opened on the rotating guide rod two and having opposite rotation directions, a pair of nuts two fixedly connected with the two sliding blocks one and threadedly connected with the two sections of external threads two respectively, and a hand crank two fixedly arranged on one end of the rotating guide rod two.

[0015] By using the above technical scheme, when the two sliding blocks one need to be driven to slide relatively on the positioning support one, the hand crank one is manually rotated to rotate the rotating guide rod two on the positioning support one, since the nuts two on the two sliding blocks two are threadedly connected with the two sections of external threads two on the rotating guide rod two respectively, and the two sections of external threads two have opposite rotation directions, thus under the rotation of the rotating guide rod two, the two nuts two will drive the two sliding blocks to move along the rotating guide rod two in the direction of approaching or moving away from each other, so as to drive the detection support and the positioning support two to move away from or approach the positioning support one in cooperation with the connecting rod one.

[0016] The further arrangement of the present application is that the positioning support two is horizontally fixedly arranged with a fixed guide rod two penetrating through the two sliding blocks two, and the two sliding blocks two are respectively fixedly arranged with circular sliding sleeves sliding on the fixed guide rod two.

[0017] By adopting the technical scheme, the sliding block 2 can stably slide on the positioning support 2.

[0018] Further, the positioning assembly comprises a pair of L-shaped connecting plates fixed on the positioning support 1 or the positioning support 2, a rotating shaft 3 rotatably connected to two L-shaped connecting plates and parallel to the two supporting rollers, and a plurality of positioning rollers fixed on the rotating shaft 3.

[0019] By adopting the technical scheme, the positioning support 1 and the positioning support 2 can be matched to realize the positioning effect of the upper and lower ends of the part outer contour surface, and the part can be further held and pressed in the middle of the two supporting rollers to ensure the stable rotation of the part.

[0020] Further, the position degree detection assembly comprises a sliding block 3 slidably connected to the detection support, a T-shaped connecting plate fixed on the side of the sliding block 3 away from the detection support 1, a dial indicator slidably connected to one end of the T-shaped connecting plate, a square support arm fixed on one side of the T-shaped connecting plate and parallel to the supporting roller, a square slide rod fixed on the side of the square support arm away from the T-shaped connecting plate, a square end fixed on the side of the square slide rod away from the square support arm, a square sleeve slidably sleeved on the square slide rod, a spring sleeved on the square slide rod and having two ends connected to the square support arm and the square sleeve, a pair of connecting rods 2 having two ends respectively hingedly connected to the square end and the square sleeve, and a detection roller having two ends rotatably connected to the other ends of the two connecting rods 2.

[0021] When the position degree detection assembly is required to measure the position degree of the inner hole of the part, first, the adjusting assembly is used to control the three sliders on the detection support to slide, so that the T-shaped connecting plate is close to one end of the part, then the direction support arm and the direction slide rod at one end of the T-shaped connecting plate are inserted into the inner hole of the part, because the detection roller is hinged to the square end and the square slide sleeve through the two connecting rods two, and the spring on the square slide rod is connected to the square support arm and the square slide sleeve at both ends, therefore, after the detection roller enters the inner hole of the part, the square slide sleeve will compress the spring away from the square end, and the spring will react on the square slide sleeve, so that the two connecting rods two jointly push the detection roller to tightly abut against the inner wall of the circular hole, then the relative position of the adjusting dial gauge and the mounting hole on the support seat three is adjusted through the locking screw one on the support seat two, so that the dial gauge measuring head and the top plate on the square slide sleeve are in contact, and the dial gauge is zeroed, then the support roller and the part are driven to rotate by using the driving assembly one, so that the detection roller rotates along the side wall of the inner hole of the part, because the working principle of the dial gauge is that the small linear movement of the measured size causes the movement of the measuring rod to be enlarged as the rotation of the pointer on the scale disc, therefore, during the rotation of the detection roller relative to the side wall of the inner hole of the part, the square slide sleeve will slide on the square slide rod through the pushing of the connecting rod two, and the top plate will transmit the position change of the square slide sleeve to the measuring head of the dial gauge, so that the pointer on the dial plate rotates clockwise or counterclockwise, finally, the maximum values read by the clockwise and counterclockwise rotation of the pointer are added and divided by two, so that the distance between the outer contour surface axis of the part and the inner hole axis of the part can be calculated, that is, the position degree of the inner hole of the part is obtained.

[0022] The adjusting assembly comprises a T-shaped guide rail fixed to one side of the detection support, a T-shaped groove formed in the third slider and embedded in the T-shaped guide rail, a locking screw two threadedly connected to the top of the third slider and capable of penetrating into the T-shaped groove at one end, and a knob two fixedly arranged on the screw cap of the locking screw two.

[0023] By adopting the above technical scheme, the sliding of the third slider on the detection support can be released or locked by only screwing the knob two, so that the relative position adjustment of the third slider and the detection support is realized.

[0024] The position degree detection tool has the advantages that, through the connection structure between the first positioning support, the second positioning support and the detection support, the position relationship between the positioning assembly and the position degree detection assembly, the position degree of the inner hole of the part can be quickly measured, the height position of the positioning assembly and the position degree detection assembly relative to the support roller can be adjusted at any time to adapt to the position degree measurement of the inner hole of the part with different outer diameters, and compared with the transmission fixed detection structure, the position degree detection tool has good universality, the measurement process is flexible and convenient, and the measurement error caused by the wear of the positioning part does not need to be worried. BRIEF DESCRIPTION OF DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0027] Figure 2 This is a schematic diagram showing the positional relationship between the positioning bracket 1, the positioning bracket 2, and the detection bracket of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of drive component two and drive component three of the present invention;

[0029] Figure 4 This is a schematic diagram of the drive component of the present invention;

[0030] Figure 5 This is a schematic diagram of the position detection component structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the operation of the position detection component of the present invention;

[0032] In the diagram, 1. Base; 11. Support base one; 12. Support base two; 2. Support roller; 21. Rotating shaft one; 22. Drive assembly one; 221. Rotating shaft two; 222. Toothed pulley one; 223. Toothed pulley two; 224. Toothed belt; 225. Knob one; 3. Positioning bracket one; 31. Slider one; 4. Positioning bracket two; 41. Slider two; 5. Detection bracket; 51. Hinge shaft; 52. Connecting rod one; 6. Drive assembly two; 61. Rotating guide rod one; 62. Fixed guide rod one; 63. External thread one; 64. Nut one; 65. Hand crank one; 66. Height limit plate; 7. Drive assembly three; 71. Rotating guide rod two; 72. External thread two; 73. Screw 74. Hand crank 2; 75. Fixed guide rod 2; 76. Circular sliding sleeve; 8. Positioning assembly; 81. L-shaped connecting plate; 82. Rotating shaft 3; 83. Positioning roller; 9. Position detection assembly; 91. Slider 3; 92. T-shaped connecting plate; 93. Dial indicator; 94. Square support arm; 95. Square sliding rod; 951. Square end; 952. Square sliding sleeve; 953. Spring; 954. Top plate; 96. Connecting rod 2; 97. Detection roller; 98. Support base 3; 981. Mounting hole; 99. Locking screw 1; 10. Adjustment assembly; 101. T-shaped guide rail; 102. T-shaped groove; 103. Locking screw 2; 104. Knob 2. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Example: A tooling for quickly detecting the position of an inner hole, such as... Figures 1-3 As shown, the device includes a base 1, a pair of parallel and horizontally rotatable support rollers 2 mounted on the base 1, a drive assembly 22 for synchronously rotating the two support rollers 2, a pair of vertically parallel and horizontally lifting positioning brackets 3 and 4 mounted on the base 1, a detection bracket 5 horizontally lifting and parallel to the positioning brackets 3 and 4, a pair of sliders 31 sliding on the positioning brackets 3 and 4 respectively, a pair of sliders 41 sliding on the positioning brackets 4 respectively, a pair of intersecting connecting rods 52 hinged at both ends to the two sliders 31 and 41 respectively, and a connecting rod 52 that fixes one side of the detection bracket 5 and rotatably extends through the two connecting rods 52. 2. The hinge shaft at the center of the intersection 51, the drive assembly 2 for driving the positioning bracket 1 3 to lift and slide 6, the drive assembly 3 for driving the two sliders 1 31 to move closer and further away from each other 7, a pair of positioning components 8 that are rotatably connected to the positioning bracket 1 3 and the positioning bracket 2 4 respectively and are symmetrically positioned 8, a position detection component 9 that is slidably set on the detection bracket 5 and located between the two positioning components 8, and an adjustment component 10 that adjusts and controls the sliding of the position detection component 9. The positioning end of the positioning component 8 and the measuring end of the position detection component 9 are both located on the symmetrical line between the two support rollers 2, and the positioning end of the positioning component 8 abuts against the outer contour surface of the part, and the measuring end of the position detection component 9 abuts against the inner wall of the inner hole of the part.

[0035] By adopting the above technical solution, when it is necessary to measure the inner hole of a part, the part is first placed horizontally on the two support rollers 2, and the positioning bracket 3 is raised and lowered using the second drive assembly 6, so that the positioning end of the positioning assembly 8 on it abuts against the lower end of the outer contour surface of the part. Then, the two sliders 31 on the positioning bracket 3 are driven away from each other using the third drive assembly 7. Since the two sliders 31 on the positioning bracket 3 and the two sliders 41 on the second positioning bracket 4 are connected by two connecting rods, and the hinge shaft 51 on one side of the detection bracket 5 rotates through the intersection center of the two connecting rods, during the sliding process of the two sliders 31, the second positioning bracket 4 and the detection bracket 5 will simultaneously move towards the positioning bracket 3. The positioning components are brought close together, with the positioning end of the positioning component 8 on the positioning bracket 2 4 abutting against the upper end of the outer contour surface of the part, and the position measurement component 9 on the detection bracket 5 positioned at the axial center of the outer contour surface of the part. Then, the adjustment component 10 is used to control the sliding of the position measurement component 9, so that its measuring end extends into the inner hole of the part and abuts against the inner wall of the inner hole of the part. Finally, the drive component 1 22 is used to drive the two support rollers 2 to rotate synchronously, so that the parts placed on them rotate in place. At the same time, the measuring end of the position measurement component 9 will move relative to the inner wall of the inner hole of the part, thereby measuring the distance between the axial center of the outer contour surface of the part and the axial center of its inner hole, thus obtaining the position of the inner hole of the part. Among them, the base 1 is fixedly provided with support seats 11 at both ends of the support rollers 2, and the two ends of the support rollers 2 are fixedly connected with rotating shafts 21 that rotate through the two support seats 11, which can ensure the stable rotation of the support rollers 2.

[0036] like Figure 4As shown, the drive assembly 22 includes a rotating shaft 221 rotatably mounted on the base 1 and parallel to the middle of the two support rollers 2, a toothed pulley 222 fixedly mounted on the rotating shaft 221, a pair of toothed pulleys 223 respectively fixedly mounted on the rotating shaft 21 of the two support rollers, and a toothed belt 224 sleeved and installed on the toothed pulleys 222 and 223. The width of the belt groove of the toothed pulley 222 is equal to the sum of the widths of the belt grooves of the two toothed pulleys 223. The two toothed pulleys 223 and the toothed belt 224 they cooperate with are staggered, and the two toothed belts 224 share the same toothed pulley 222. A knob 225 is fixedly mounted on the rotating shaft 221. A support seat 12 is fixedly mounted on the base 1 to support the rotation of the rotating shaft 221. The knob 225 and the toothed pulleys 222 are located on both sides of the support seat 12. By using the aforementioned drive assembly 22, when it is necessary to drive the two support rollers 2 to rotate synchronously, firstly, manually turn the knob 225 to make the rotating shaft 221 drive the toothed pulley 222 to rotate. Then, two toothed belts 224 are installed on the toothed pulley 222 and the toothed pulley 223, which will transmit the rotation of the toothed pulley 222 to the two toothed pulleys 223 respectively. Finally, the rotating shaft 21 and the support roller 2 will rotate synchronously under the drive of the two toothed pulleys 223.

[0037] like Figure 2 , Figure 3 As shown, the second drive assembly 6 includes a rotating guide rod 61 vertically rotatably mounted on the base 1 and passing through the positioning bracket 3, a fixed guide rod 75 vertically fixed on the base 1 and passing through the positioning bracket 4, an external thread 63 formed on the side wall of the rotating guide rod 61, and a nut 64 threadedly connected to the external thread 63 and fixedly connected to the positioning bracket 3. A hand crank 65 is fixedly mounted on the top of the rotating guide rod 61. By using the above-mentioned second drive assembly 6, when it is necessary to drive the positioning bracket 3 to rise or fall, the hand crank 65 is manually turned, causing the rotating guide rod 61 on the base 1 to rotate. Since the rotating guide rod 61 and the fixed guide rod 62 respectively pass through the positioning bracket 3, and the nut 64 on the positioning bracket 3 is threadedly connected to the rotating guide rod 61, the rotation of the rotating guide rod 61 causes the nut 64 to drive the positioning bracket 3 to slide up and down along the rotating guide rod 61 and the fixed guide rod 62, thereby realizing the up and down movement of the positioning bracket 3. Among them, the rotating guide rod 61 and the fixed guide rod 62 also pass through the detection bracket 5 and the positioning bracket 4. The fixed guide rod 62 is fixedly installed with a height limit plate 66. One end of the rotating guide rod 61 passes through the height limit plate 66 and is fixedly connected to the hand crank 65, which can ensure that the detection bracket 5 and the positioning bracket 4 move up and down stably with the positioning bracket 3.

[0038] like Figure 3As shown, the drive assembly 3 7 includes a rotating guide rod 2 71 that rotates horizontally on the positioning bracket 1 3 and passes through the two sliders 1 31, two symmetrical external threads 2 72 that are opened on the rotating guide rod 2 71 and have opposite directions of rotation, and a pair of nuts 2 73 that are respectively fixedly connected to the two sliders 1 31 and threadedly connected to the two external threads 2 72. A hand crank 2 74 is fixedly provided at one end of the rotating guide rod 2 71. By employing the aforementioned drive component 7, when it is necessary to drive the two sliders 31 to slide relative to each other on the positioning bracket 3, the hand crank 65 is manually turned, causing the rotating guide rod 71 on the positioning bracket 3 to rotate. Since the nuts 73 on the two sliders 41 are threadedly connected to the two external threads 72 on the rotating guide rod 71, and the two external threads 72 rotate in opposite directions, under the rotation of the rotating guide rod 71, the two nuts 73 will respectively carry the two sliders, moving along the rotating guide rod 71 in a direction that moves closer or further away from each other. This, in turn, cooperates with the connecting rod 52 to drive the detection bracket 5 and the positioning bracket 4 to move away from or closer to the positioning bracket 3. Among them, the positioning bracket 4 has a fixed guide rod 75 horizontally fixedly installed, passing through the two sliders 41. The two sliders 41 are respectively fixedly installed with circular sliding sleeves 76 that slide on the fixed guide rod 75, which can ensure that the sliders 41 slide stably on the positioning bracket 4.

[0039] like Figure 2 As shown, the positioning assembly 8 includes a pair of L-shaped connecting plates 81 fixedly mounted on the positioning bracket 1 3 or the positioning bracket 2 4; a rotating shaft 3 82 rotatably connected to the two L-shaped connecting plates 81 at both ends and located parallel to the middle of the two support rollers 2; and multiple positioning rollers 83 fixed on the rotating shaft 3 82. The axes of the rotating shaft 3 82 and the positioning rollers 83 are both located on the symmetrical line between the two support rollers 2. The two support seats 1 11 and the two support rollers 2 are located between the two L-shaped connecting plates 81. By using the above-mentioned positioning assembly 8, not only can it cooperate with the positioning bracket 1 3 and the positioning bracket 2 4 to achieve the positioning effect of the upper and lower ends of the outer contour surface of the part, but it can also further lift and press the part between the two support rollers 2 to ensure the stable rotation of the part.

[0040] like Figure 1 , Figure 5As shown, the position detection component 9 includes a slider 91 that is slidably connected to the detection bracket 5, a T-shaped connecting plate 92 fixedly disposed on the side of the slider 91 away from the detection bracket 5, a dial indicator 93 slidably connected to one end of the T-shaped connecting plate 92, a square support arm 94 vertically fixed to one side of the T-shaped connecting plate 92 and parallel to the support roller 2, a square slide rod 95 vertically fixed to the end of the square support arm 94 away from the T-shaped connecting plate 92, a square end 951 fixed to the end of the square slide rod 95 away from the square support arm 94, a square sleeve 952 slidably sleeved on the square slide rod 95, a spring 953 sleeved on the square slide rod 95 and connected at both ends to the square support arm 94 and the square sleeve 952 respectively, and a pair of springs at each end. A connecting rod 96, which hinges the square end 951 and the square sleeve 952, is connected to two detection rollers 97 at the other ends of the two connecting rods 96 respectively. A support base 98 is fixedly installed at one end of the T-shaped connecting plate 92, and a mounting hole 981 is provided for the dial indicator 93 sleeve to pass through. A locking screw 99 that can extend into the mounting hole 981 is threaded on the support base 98. A top plate 954 that contacts the measuring head of the dial indicator 93 is fixedly connected to the end of the square sleeve 952 away from the square end 951. The top of the detection roller 97 is located on the symmetrical line between the two support rollers 2. The center lines of the square slide rod 95, the square end 951 and the square sleeve are all located on the symmetrical line between the positioning rollers 83 in the upper and lower positioning components 8.

[0041] When the position measurement component 9 is used to measure the position of the inner hole of a part, the slider 91 on the detection bracket 5 is first controlled by the adjustment component 10 to slide, so that the T-shaped connecting plate 92 moves closer to one end of the part. Then, the directional support arm and directional slide rod at one end of the T-shaped connecting plate 92 will be inserted into the inner hole of the part. Since the detection roller 97 is hinged to the square end 951 and the square slide sleeve 952 respectively by the two connecting rods 96, and the two ends of the spring 953 on the square slide rod 95 are connected to the square support arm 94 and the square slide sleeve 952 respectively, after the detection roller 97 enters the inner hole of the part, the square slide sleeve 952 will move away from the square end 951 and compress the spring 953. At the same time, the spring 953 reacts to the square slide sleeve 952, so that the two connecting rods 96 push the detection roller 97 tightly against the inner wall of the round hole. Then, the dial indicator 93 and the mounting plate on the support 98 are adjusted by the locking screw 99 on the support 12. The relative positions of the mounting holes 981 are adjusted so that the measuring head of the dial indicator 93 contacts the top plate 954 on the square sliding sleeve 952, and the dial indicator 93 is zeroed at the same time. Then, the drive assembly 22 drives the support roller 2 and the part to rotate, so that the detection roller 97 rotates relative to the inner wall of the part. Since the working principle of the dial indicator 93 is to amplify the tiny linear movement of the measuring rod caused by the measured dimension into the rotation of the pointer on the dial, during the rotation of the detection roller 97 relative to the inner wall of the part, the square sliding sleeve 952 will continuously slide and change position on the square sliding rod 95 through the push of the connecting rod 2 96. At the same time, the top plate 954 transmits the position change of the square sliding sleeve 952 to the measuring head of the dial indicator 93, so that the pointer on the dial of the dial indicator 93 rotates clockwise or counterclockwise. Finally, the maximum values ​​read by the clockwise and counterclockwise rotation of the pointer are added together and divided by two to calculate the distance between the axis of the outer contour surface of the part and the axis of its inner hole, that is, to obtain the position of the inner hole of the part.

[0042] like Figure 5 , Figure 6 As shown, the principle for calculating the positional tolerance of the inner hole of the above-mentioned part is as follows:

[0043] Assumptions: The axis of the outer contour surface of the part is point Q; the axis of the inner hole of the part is point P; when the dial indicator 93 pointer is zero, the point of tangency between the testing roller 97 and the inner hole is point E; when the dial indicator 93 pointer rotates clockwise to its maximum value, the point of tangency between the testing roller 97 and the inner hole is point F; when the dial indicator 93 pointer rotates counterclockwise to its maximum value, the point of tangency between the testing roller 97 and the inner hole is point G. (Points F, P, Q, and G are all on the same straight line.)

[0044] The inner diameter of the part's inner hole is FP or PG.

[0045] The distance between the axis of the outer contour surface of the part and the axis of its inner hole is PQ.

[0046] The distance from point F to point Q is FQ.

[0047] The distance from point G to point Q is QG.

[0048] The maximum value read by the dial indicator 93 when the pointer is turned clockwise is FQ-EQ.

[0049] The maximum value read by the counter-clockwise rotation of the dial indicator 93 is EQ-QG.

[0050] ∵FP=FQ-PQ;PG=PQ+QG:FP=PG

[0051] Therefore, 2PQ=FQ-QG

[0052] Since FQ - QG = (FQ - EQ) + (EQ - QG)

[0053] Therefore, PQ = [(FQ - EQ) + (EQ - QG)] ÷ 2

[0054] Therefore, it can be concluded that the distance between the center position of the outer contour surface of the part and the center position of its inner hole is equal to half of the sum of the maximum values ​​read by the dial indicator 93 pointer in clockwise and counterclockwise directions.

[0055] like Figure 5 As shown, the adjustment assembly 10 includes a T-shaped guide rail 101 fixed to one side of the detection bracket 5, a T-shaped groove 102 formed on the slider 91 and fitted into the T-shaped guide rail 101, a locking screw 103 threaded to the top of the slider 91 with one end able to pass into the T-shaped groove 102, and a knob 104 fixedly mounted on the nut of the locking screw 103. By using the adjustment assembly 10, simply turning the knob 104 can release or lock the slider 91 from sliding on the detection bracket 5, thereby adjusting the relative position of the slider 91 and the detection bracket 5.

Claims

1. A tooling for rapidly detecting the positional accuracy of an inner hole, characterized in that, The device includes a base (1), a pair of parallel and horizontally rotatable support rollers (2) on the base (1), a drive assembly (22) for driving the two support rollers (2) to rotate synchronously, a pair of vertically parallel and horizontally lifting positioning brackets (3) and (4) on the base (1), a detection bracket (5) horizontally lifting on the base (1) and parallel between the positioning brackets (3) and (4), a pair of sliders (31) sliding on the positioning brackets (3) and (41) sliding on the positioning brackets (4), a pair of connecting rods (52) intersecting each other and hinged at both ends to the two sliders (31) and (41) respectively, and a connecting rod (52) that fixes one side of the detection bracket (5) and rotates through the two connecting rods (52). The components include a hinge shaft (51) at the center of the intersection, a second drive assembly (6) that drives the first positioning bracket (3) to rise and slide, a third drive assembly (7) that drives the two sliders (31) to move closer and further away from each other, a pair of positioning components (8) that rotatably connect the first positioning bracket (3) and the second positioning bracket (4) and are symmetrically positioned, a position detection component (9) that is slidably set on the detection bracket (5) and located between the two positioning components (8), and an adjustment assembly (10) that adjusts and controls the sliding of the position detection component (9). The positioning end of the positioning component (8) and the measuring end of the position detection component (9) are both located on the symmetrical line between the two support rollers (2), and the positioning end of the positioning component (8) abuts against the outer contour surface of the part, and the measuring end of the position detection component (9) abuts against the inner wall of the inner hole of the part.

2. The tooling for rapid detection of inner hole position accuracy according to claim 1, characterized in that: The base (1) is fixedly provided with support seats (11) at both ends of the support roller (2), and the two ends of the support roller (2) are fixedly connected with rotating shafts (21) that rotate through the two support seats (11).

3. The tooling for rapid detection of inner hole position according to claim 2, characterized in that: The drive assembly 1 (22) includes a rotating shaft 2 (221) rotatably mounted on the base (1) and parallel to the middle of the two support rollers (2), a toothed pulley 1 (222) fixedly mounted on the rotating shaft 2 (221), a pair of toothed pulleys 2 (223) respectively fixedly mounted on the rotating shaft 1 (21) of the two support bases, and a toothed belt (224) sleeved and installed on the toothed pulley 1 (222) and the toothed pulley 2 (223). The belt groove width of the toothed pulley 1 (222) is equal to that of the two toothed pulleys. The sum of the widths of the belt grooves of the two (223) toothed pulleys two (223) and their mating toothed belts (224) are staggered, and the two toothed belts (224) share the same toothed pulley one (222). A knob one (225) is fixedly installed on the rotating shaft two (221), and a support seat two (12) is fixedly installed on the base (1) to support the rotation of the rotating shaft two (221). The knob one (225) and the toothed pulley one (222) are located on both sides of the support seat two (12).

4. The tooling for rapid detection of inner hole position according to claim 1, characterized in that: The second drive assembly (6) includes a rotating guide rod (61) that is vertically rotatably mounted on the base (1) and passes through the positioning bracket (3), a fixed guide rod (75) that is vertically fixed on the base (1) and passes through the positioning bracket (4), an external thread (63) that is opened on the side wall of the rotating guide rod (61), and a nut (64) that is threaded to the external thread (63) and fixedly connected to the positioning bracket (3). A hand crank (65) is fixedly mounted on the top end of the rotating guide rod (61).

5. The tooling for rapid detection of inner hole position according to claim 4, characterized in that: The rotating guide rod (61) and the fixed guide rod (62) also pass through the detection bracket (5) and the positioning bracket (4). The fixed guide rod (62) is fixedly provided with a height limit plate (66). One end of the rotating guide rod (61) passes through the height limit plate (66) and is fixedly connected to the hand crank (65).

6. The tooling for rapid detection of inner hole position according to claim 1, characterized in that: The drive assembly three (7) includes a rotating guide rod two (71) that rotates horizontally on the positioning bracket one (3) and passes through the two sliders one (31) at the same time, two external threads two (72) that are symmetrically opened on the rotating guide rod two (71) and rotate in opposite directions, and a pair of nuts two (73) that are respectively fixedly connected to the two sliders one (31) and threadedly connected to the two external threads two (72). A hand crank two (74) is fixedly provided at one end of the rotating guide rod two (71).

7. The tooling for rapid detection of inner hole position according to claim 1, characterized in that: The positioning bracket 2 (4) is horizontally fixed with a fixed guide rod 2 (75) passing through the two sliders 2 (41), and the two sliders 2 (41) are respectively fixed with circular sliding sleeves (76) that slide on the fixed guide rod 2 (75).

8. The tooling for rapid detection of inner hole position according to claim 2, characterized in that: The positioning component (8) includes a pair of L-shaped connecting plates (81) fixedly mounted on the positioning bracket one (3) or the positioning bracket two (4), a rotating shaft three (82) rotatably connected to the two L-shaped connecting plates (81) at both ends and parallel to the middle of the two support rollers (2), and a plurality of positioning rollers (83) fixed on the rotating shaft three (82). The axes of the rotating shaft three (82) and the positioning rollers (83) are both located on the symmetrical line between the two support rollers (2), and the two support seats one (11) and the two support rollers (2) are located between the two L-shaped connecting plates (81).

9. The tooling for rapid detection of inner hole position according to claim 8, characterized in that: The position detection component (9) includes a slider three (91) slidably connected to the detection bracket (5), a T-shaped connecting plate (92) fixedly disposed on the side of the slider three (91) away from the detection bracket (5), a dial indicator (93) slidably connected to one end of the T-shaped connecting plate (92), a square support arm (94) vertically fixed to one side of the T-shaped connecting plate (92) and parallel to the support roller (2), a square slide rod (95) vertically fixed to the end of the square support arm (94) away from the T-shaped connecting plate (92), a square end (951) fixed to the end of the square slide rod (95) away from the square support arm (94), a square sleeve (952) slidably sleeved on the square slide rod (95), a spring (953) sleeved on the square slide rod (95) and connected at both ends to the square support arm (94) and the square sleeve (952) respectively, and a pair of hinged connections at one end respectively. The two connecting rods (96) of the square end (951) and the square sliding sleeve (952) are rotatably connected to the detection rollers (97) at the other ends of the two connecting rods (96). One end of the T-shaped connecting plate (92) is fixedly provided with a support base (98) and has an installation hole (981) through which the sleeve of the dial indicator (93) passes. The support base (98) is threaded with a locking screw (99) that can extend into the installation hole (981). The end of the square sliding sleeve (952) away from the square end (951) is fixedly connected with a top plate (954) that contacts the measuring head of the dial indicator (93). The top of the detection roller (97) is located on the symmetrical line between the two support rollers (2). The center lines of the square sliding rod (95), the square end (951) and the square sleeve are all located on the symmetrical line between the positioning rollers (83) in the upper and lower positioning components (8).

10. A tooling for rapid detection of inner hole position accuracy according to claim 9, characterized in that: The adjustment assembly (10) includes a T-shaped guide rail (101) fixed to one side of the detection bracket (5), a T-shaped groove (102) opened on the slider three (91) and fitted into the T-shaped guide rail (101), a locking screw two (103) threaded to the top of the slider three (91) and one end of which can be inserted into the T-shaped groove (102), and a knob two (104) fixedly set on the nut of the locking screw two (103).

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