Multifunctional measuring device and method for measuring coaxiality of elastic thin-walled disc spring

Abstract

The present invention relates to a multifunctional measuring device for the coaxiality of an elastic thin-walled disc spring, which comprises a base; two movable brackets are arranged on the base, each of which is provided with a rotating shaft, the axes of the rotating shafts on each movable bracket are collinear, a first mandrel and a second mandrel are fixed on the two rotating shafts arranged opposite to each other, the first mandrel and the second mandrel are arranged coaxially and are both arranged coaxially with the rotating shaft, a guiding arc surface is arranged on the end of the first mandrel away from the rotating shaft, a pressure block is arranged on the end of the second mandrel away from the rotating shaft, a vertically arranged pressure surface is arranged on the pressure block, a dial indicator is arranged horizontally on the base, and a measuring head is arranged on the dial indicator. The present invention also relates to a measuring method, in which half of the difference between the maximum value and the minimum value of the radial runout on the dial indicator is used as the coaxiality deviation. The present invention can adapt to disc springs of various sizes, quickly and accurately measure the coaxiality difference, and is efficient and practical.

Description

Technical Field

[0001] The invention relates to a multifunctional measuring device for coaxiality of an elastic thin-wall disc spring and a measuring method thereof. Background Art

[0002] The disc spring is also known as Belleville spring washer. The disc spring is shaped like a conical disc. It is different from traditional springs and has its own special functions. Its main features are large load, short stroke, small space required, convenient combination and use, easy maintenance and replacement, and high economic safety. It is suitable for precision heavy machinery with small space and large load. The best use range of its compression stroke is between 10%-75% of its maximum compression stroke. In the process of making disc springs, due to the special shape, it is easy to cause the round mouths at both ends of the disc spring to be misaligned, which affects the quality of the disc spring and the use of the disc spring, which is very inconvenient. Summary of the invention

[0003] The first object of the present invention is to provide a multifunctional measuring device for the coaxiality of an elastic thin-walled disc spring which has an ingenious structure and is efficient and practical.

[0004] The technical solution to achieve the purpose of the present invention is: the present invention has a base; the base is provided with two relatively arranged movable brackets, each movable bracket is provided with a horizontally arranged rotating shaft, the axes of the rotating shafts on each movable bracket are collinear, and the first core shaft and the second core shaft are respectively fixed on the two relatively arranged rotating shafts, the first core shaft and the second core shaft are coaxially arranged and are both coaxially arranged with the rotating shaft, the first core shaft is provided with a guiding arc surface at one end away from the rotating shaft to guide the first core shaft to be clamped into a disc spring and pressed against the disc spring, the second core shaft is provided with a pressing block for pressing against the large end face of the disc spring at one end away from the rotating shaft, the pressing block is provided with a vertically arranged pressing surface, and a dial indicator is provided on the base for horizontal sliding, and a measuring head is provided on the dial indicator, after the first core shaft is clamped into the disc spring, it is fixed by the pressure of the pressing block on the second core shaft, and the dial indicator coaxially measures the pressure of the disc spring through the rotation of the rotating shaft and the measuring head.

[0005] Each rotating shaft is provided with a through hole coaxially arranged with the rotating shaft, the first core shaft is provided with a first sink groove coaxially arranged with the first core shaft, an adjustment component for fixing one end of a disc spring is provided in the first core shaft, the adjustment component includes a first rotating rod, an adjustment block with an equilateral trapezoidal cross-section, a plurality of slide rods slidably arranged on the adjustment block, and a pressure plate fixed on the slide rod and used for pressing the disc spring, one end of the first rotating rod is rotatably connected in the first sink groove, the other end of the first rotating rod passes through the through hole and then extends out of the first core shaft, the first rotating rod is provided with a threaded portion, and the threaded portion is located at the first In the groove, the adjusting block is provided with an internal thread coaxially arranged with the first groove, and the adjusting block is slidably connected to the first rotating rod through the cooperation of the threaded part on the first rotating rod and the internal thread on the adjusting block. The first core shaft is provided with a plurality of through grooves which are connected to each sliding rod and can be passed through by the sliding rods. One end of each sliding rod is slidably connected to the adjusting block along the extension direction of the upper side wall of the adjusting block, and the other end of each sliding rod is fixedly connected to the pressure plate after passing through the corresponding through hole. Each pressure plate is pressed on the disc spring through the sliding connection between the first rotating rod and the adjusting block, and the sliding cooperation between the sliding rod and the adjusting block.

[0006] Each pressing plate is arc-shaped, and the arc surface on each pressing plate is coplanar with the guide arc surface when the pressing plate is not extended, and a plurality of arc-shaped slots for one end of the disc spring to be inserted are arranged on the pressing plate.

[0007] The above-mentioned second core shaft is provided with a second groove coaxially arranged with the second core shaft, the through hole on the rotating shaft connected to the second core shaft is communicated with the second groove, and the second core shaft is provided with a pressing component for pressing the large end surface of the disc spring. The pressing component includes a second rotating rod coaxially arranged with the second groove, a transmission gear, a plurality of racks and an adjustment plate corresponding to each rack, one end of the second rotating rod is rotatably connected to the second groove, and the other end of the second rotating rod extends out of the through hole, a transmission gear is provided at one end of the second rotating rod located in the second groove, and a gear groove for the transmission gear to rotate is provided in the second groove. The pressure surface is provided with a plurality of lifting grooves, each of which is distributed in a circular array on the pressure surface along the axis of the second core shaft, and the lifting grooves extend outwardly to the outside of the second core shaft along the vertical direction of the second core shaft. Each adjustment plate is lifted and arranged in the corresponding lifting groove, and each lifting groove is provided with a connecting groove, and both sides of the connecting groove are respectively connected with the gear groove and the lifting groove, and a rack is provided at the bottom of each lifting plate, which can pass through the connecting groove and cooperate with the transmission gear. Each adjustment plate is lifted and arranged in the corresponding lifting groove through the rotation of the second rotating rod and the transmission cooperation between the transmission gear and the rack.

[0008] A slide rail is provided in each connecting groove, a slider is provided at the bottom of each rack, and each rack is slidably arranged in the connecting groove through the cooperation of each slider and the corresponding slide rail. A limit block is provided on each rack, and a limit baffle is provided in the connecting groove. The limit blocks on each rack limit the sliding position of each rack by cooperating with the limit baffle.

[0009] The cross-section of each lifting groove is "T"-shaped, and the cross-section of each adjustment plate is also "T"-shaped. The outer surface of each adjustment plate is coplanar with the pressure surface. The end surface of each adjustment plate away from the rack is arc-shaped and coplanar with the side of the pressure block when the adjustment plate is not lifted.

[0010] The pressing surface is provided with a friction layer which can prevent the disc spring from moving after pressing.

[0011] A meter frame is slidably provided on the base, a meter base is rotatably provided on the meter frame, a rotation axis of the meter base is perpendicular to the base, and the dial indicator is fixed on the meter base.

[0012] The second object of the present invention is to provide a measuring method that can quickly and accurately measure the coaxiality of a disc spring.

[0013] The technical solution for achieving the purpose of the present invention is: the present invention includes the above-mentioned multifunctional measuring device for coaxiality of elastic thin-walled disc springs, comprising the following steps:

[0014] A. Measure the size of the large end surface of the disc spring;

[0015] B. Rotate the second rotating rod to extend each second adjustment plate to the same or similar size as the large end surface, move the movable brackets at both ends to slide relatively until the first core shaft extends into the disc spring, the large end surface of the disc spring presses against the pressing surface, and then lock each movable bracket through the locking piece;

[0016] C. Rotate the first rotating rod to extend each pressing plate to compress the disc spring to ensure the coaxiality of the disc spring and the first core shaft;

[0017] D. Move the meter stand and rotate the meter base until the dial indicator is located at the upper end of the disc spring, and lower the position of the dial indicator until the measuring head is pressed against the outer wall of the disc spring;

[0018] E. Rotate the shaft slowly and evenly, observe the fluctuation of the dial indicator pointer, and take half of the difference between the maximum and minimum values ​​as the coaxiality deviation value, and compare it with the range of the standard error value.

[0019] The present invention has positive effects: (1) The present invention arranges two movable brackets on the base, and arranges a first core shaft and a second core shaft rotatably arranged on the movable brackets, arranges a guiding arc surface on the first core shaft, and arranges a pressure block on the second core shaft. After the disc spring is installed, the difference in coaxiality of the disc spring is determined by measuring with a dial indicator. According to the comparison with the standard value, the processing accuracy of the disc spring is determined by accurately installing the disc spring and measuring and comparing it. This can effectively solve the problem in the prior art that the disc spring is affected by processing errors. It has good installation accuracy, has a good positioning effect on the workpiece, and also ensures the measurement accuracy. It is efficient and convenient.

[0020] (2) The present invention arranges an adjustment component in the first core shaft. The rotation of the first rotating rod drives the threaded portion on the first rotating rod to cooperate with the internal thread on the adjusting block to drive the adjusting block to slide. The sliding of the adjusting block drives the sliding rod and the pressure plate on the sliding rod to extend. After each pressure plate is extended, it is pressed on the disc spring, thereby positioning one end of the disc spring. It can adapt to disc springs of different inner diameters, has good adjustability and applicability, and is efficient and convenient.

[0021] (3) The present invention further positions one end of the disc spring by arranging the pressure plate into an arc shape and arranging an arc-shaped slot on each of the pressure plates for the disc spring to be inserted into.

[0022] (4) The present invention drives the friction hybrid gear and the rack to adjust the lifting and lowering of each adjustment plate through the rotation of the second rotating rod, thereby adapting to different disc springs. On the one hand, it can be adjusted according to different disc spring sizes, and on the other hand, it can also press the disc spring more firmly, thereby positioning the disc spring as a whole, which plays a good fixing and stabilizing role in subsequent measurements.

[0023] (5) The present invention provides a slide rail in the connecting groove and a slider on each rack. The slider and the slide rail cooperate to guide and limit the lifting of the rack, thereby ensuring the smoothness of the lifting of the rack. The limit block and the limit plate cooperate to ensure that the rack will not fall out of the connecting groove when sliding, thereby ensuring the stability and safety of the rack sliding.

[0024] (6) The present invention arranges the lifting slot into a "T" shape and the adjusting plate into a "T" shape. The stability of the adjusting plate during lifting and lowering is ensured by the cooperation between the adjusting plate and the lifting slot, thereby avoiding displacement of the adjusting plate during lifting and lowering. The present invention is safe, efficient and practical.

[0025] (7) The present invention further ensures the stability of the disc spring when pressed by providing a friction layer on the pressing surface, thereby avoiding displacement of the disc spring during the measurement process.

[0026] (8) The present invention arranges a magnet on the first core shaft, arranges a positioning groove on the second core shaft, arranges a magnetic block in the positioning groove, and connects the magnetic block and the magnet to ensure the coaxiality of the first core shaft and the second core shaft during rotation, thereby ensuring the accuracy of subsequent measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0028] Figure 1 It is a schematic diagram of the overall structure of the multifunctional measuring device for the coaxiality of an elastic thin-walled disc spring in the present invention;

[0029] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0030] Figure 3 is a schematic diagram of the internal structure of the first mandrel in the present invention;

[0031] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0032] Figure 5 is a schematic diagram of the internal structure of the second mandrel in the present invention;

[0033] Figure 6 It is a schematic diagram of the internal structure of the pressing block in the present invention;

[0034] Figure 7 for Figure 6 Enlarged view of point C in the middle. DETAILED DESCRIPTION

[0035] See Figures 1 to 7 The present invention relates to a multifunctional measuring device for the coaxiality of an elastic thin-walled disc spring, comprising a base 1; two relatively arranged movable brackets 2 are arranged on the base 1, each movable bracket 2 is provided with a horizontally arranged rotating shaft 21, the axes of the rotating shafts 21 on each movable bracket 2 are collinear, a first mandrel 3 and a second mandrel 4 are respectively fixed on the relatively arranged two rotating shafts 21, the first mandrel 3 and the second mandrel 4 are coaxially arranged and are both coaxially arranged with the rotating shaft 21, and a guiding first mandrel 3 is provided at one end of the first mandrel 3 away from the rotating shaft 21 A core shaft 3 is inserted into the disc spring and pressed against the guide arc surface 31 on the disc spring. A pressing block 41 for pressing against the large end surface of the disc spring is provided on the second core shaft 4 at one end away from the rotating shaft 21. A vertically arranged pressing surface is provided on the pressing block 41. A dial indicator 52 is provided on the base 1 for horizontal sliding. A measuring head 53 is provided on the dial indicator 52. After the first core shaft 3 is inserted into the disc spring, it is fixed by the pressing of the pressing block 41 on the second core shaft 4. The dial indicator 52 performs coaxial measurement of the pressing of the disc spring through the rotation of the rotating shaft 21 and the measuring head 53.

[0036] Each rotating shaft 21 is provided with a through hole coaxially arranged with the rotating shaft 21, and the first core shaft 3 is provided with a first sink groove 32 coaxially arranged with the first core shaft 3. The first core shaft 3 is provided with an adjustment component 6 for fixing one end of the disc spring. The adjustment component 6 includes a first rotating rod 61, an adjustment block 62 with an equilateral trapezoidal cross-section, a plurality of slide rods 63 slidably arranged on the adjustment block 62, and a pressure plate 64 fixed on the slide rod 63 and used for pressing the disc spring. One end of the first rotating rod 61 is rotatably connected in the first sink groove 32, and the other end of the first rotating rod 61 passes through the through hole and then extends out of the first core shaft 3. The first rotating rod 61 is provided with a threaded portion 611, and the threaded portion 611 is located in the first sink groove 32. The adjusting block 62 is provided with an internal thread 621 coaxially arranged with the first sink groove 32. The adjusting block 62 is slidably connected to the first rotating rod 61 through the cooperation between the threaded portion 611 on the first rotating rod 61 and the internal thread 621 on the adjusting block 62. The first core shaft 3 is provided with a plurality of through grooves corresponding to each slide rod 63 and through which the slide rod 63 can pass. One end of each slide rod 63 is slidably connected to the adjusting block 62 along the extension direction of the upper side wall of the adjusting block 62. The other end of each slide rod 63 is fixedly connected to the pressing plate 64 after passing through the corresponding through groove. Each pressing plate 64 is pressed on the disc spring through the sliding connection between the first rotating rod 61 and the adjusting block 62 and the sliding cooperation between the slide rod 63 and the adjusting block 62.

[0037] Each pressing plate 64 is arc-shaped, and the arc surface on each pressing plate 64 is coplanar with the guide arc surface 31 when the pressing plate 64 is not extended, and a plurality of arc-shaped slots 641 for one end of the disc spring to be inserted into are provided on the pressing plate 64;

[0038] The second core shaft 4 is provided with a second groove coaxially arranged with the second core shaft 4, and the through hole on the rotating shaft 21 connected to the second core shaft 4 is communicated with the second groove. The second core shaft 4 is provided with a pressing component 7 for pressing the large end surface of the disc spring. The pressing component 7 includes a second rotating rod 71 coaxially arranged with the second groove, a transmission gear 72, a plurality of racks 73 and an adjustment plate 74 corresponding to each rack 73. One end of the second rotating rod 71 is rotatably connected in the second groove, and the other end of the second rotating rod 71 extends out of the through hole. A transmission gear 72 is provided at one end of the second rotating rod 71 located in the second groove, and a gear groove 75 for the transmission gear 72 to rotate is provided in the second groove. The pressing surface is provided with a plurality of A lifting groove 411 is arranged on the pressing surface in a circular array along the axis of the second mandrel 4. The lifting groove 411 extends outwardly to the outside of the second mandrel 4 along the vertical direction of the second mandrel 4. Each adjustment plate 74 is lifted and arranged in the corresponding lifting groove 411. A connecting groove 76 is arranged in each lifting groove 411. Both sides of the connecting groove 76 are connected with the gear groove 75 and the lifting groove 411 respectively. A rack 73 is arranged at the bottom of each lifting plate, which can pass through the connecting groove 76 and then cooperate with the transmission gear 72 for transmission. Each adjustment plate 74 is lifted and arranged in the corresponding lifting groove 411 by the rotation of the second rotating rod 71 and the transmission cooperation between the transmission gear 72 and the rack 73;

[0039] Each connecting groove 76 is provided with a slide rail 751, and each rack 73 is provided with a slider 731 at the bottom. Each rack 73 is slidably arranged in the connecting groove 76 through the cooperation of each slider 731 and the corresponding slide rail 751. Each rack 73 is provided with a limit block 732, and a limit baffle 752 is provided in the connecting groove 76. The limit block 732 on each rack 73 is slidably limited to each rack 73 by cooperation with the limit baffle 752.

[0040] The cross section of each lifting groove 411 is "T" shaped, and the cross section of each adjustment plate 74 is also "T" shaped. The outer surface of each adjustment plate 74 is coplanar with the pressing surface. The end surface of each adjustment plate 74 away from the rack 73 is arc-shaped and coplanar with the side surface of the pressing block 41 when the adjustment plate 74 is not lifted.

[0041] The pressing surface is provided with a friction layer 741 which can prevent the disc spring from moving after pressing;

[0042] A meter frame 51 is slidably provided on the base 1 , a meter base 5 is rotatably provided on the meter frame 51 , a rotation axis of the meter base 5 is perpendicular to the base 1 , and the dial indicator 52 is fixed on the meter base 5 .

[0043] The present invention also relates to a measuring method, including a multifunctional measuring device for coaxiality of an elastic thin-walled disc spring, comprising the following steps:

[0044] A. Measure the size of the large end surface of the disc spring;

[0045] B. Rotate the second rotating rod 71 to extend each second adjusting plate 74 to the same or similar size as the large end surface, move the movable brackets 2 at both ends to slide relatively until the first core shaft 3 extends into the disc spring, the large end surface of the disc spring is pressed against the pressing surface, and then lock each movable bracket 2 through the locking piece;

[0046] C. Rotate the first rotating rod 61 to extend each pressing plate 64 to press the disc spring, so as to ensure the coaxiality between the disc spring and the first core shaft 3;

[0047] D. Move the meter frame 51, rotate the meter base 5 until the dial indicator 52 is located at the upper end of the disc spring, and lower the position of the dial indicator 52 until the measuring head 53 is pressed against the outer wall of the disc spring;

[0048] E. Rotate the rotating shaft 21 slowly and evenly, observe the fluctuation of the pointer of the dial indicator 52, and take half of the difference between the maximum and minimum values ​​as the coaxiality deviation value, and compare it with the range of the standard error value.

[0049] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional measuring device for the coaxiality of an elastic thin-walled disc spring, comprising a base (1); characterized in that: The base (1) is provided with two movable brackets (2) arranged opposite to each other, each movable bracket (2) is provided with a horizontally arranged rotating shaft (21), the axes of the rotating shafts (21) on each movable bracket (2) are collinear, a first core shaft (3) and a second core shaft (4) are respectively fixed to the two rotating shafts (21) arranged opposite to each other, the first core shaft (3) and the second core shaft (4) are arranged coaxially and are both arranged coaxially with the rotating shaft (21), and an end of the first core shaft (3) away from the rotating shaft (21) is provided with a guide for the first core shaft (3) to be clamped into a disc spring and pressed against the disc spring A guiding arc surface (31) is provided on the second core shaft (4), a pressing block (41) for pressing against the large end surface of the disc spring is provided on the end away from the rotating shaft (21), a pressing surface is provided on the pressing block (41), a dial indicator (52) is provided on the base (1) for horizontal sliding, a measuring head (53) is provided on the dial indicator (52), after the first core shaft (3) is clamped into the disc spring, it is fixed by the pressing block (41) on the second core shaft (4), and the dial indicator (52) performs coaxial measurement of the pressing of the disc spring through the rotation of the rotating shaft (21) and the measuring head (53); Each rotating shaft (21) is provided with a through hole coaxially arranged with the rotating shaft (21); the first core shaft (3) is provided with a first recessed groove (32) coaxially arranged with the first core shaft (3); an adjustment component (6) for fixing one end of a disc spring is provided in the first core shaft (3); the adjustment component (6) comprises a first rotating rod (61), an adjustment block (62) having an equilateral trapezoidal cross section, a plurality of slide rods (63) slidably arranged on the adjustment block (62), and a pressure plate (64) fixed on the slide rod (63) and used for pressing the disc spring; one end of the first rotating rod (61) is rotatably connected in the first recessed groove (32); the other end of the first rotating rod (61) passes through the through hole and then extends out of the first core shaft (3); a threaded portion (611) is provided on the first rotating rod (61); the threaded portion (611) is located in the first recessed groove (32). The adjusting block (62) is provided with an internal thread (621) coaxially arranged with the first sink groove (32); the adjusting block (62) is slidably connected to the first rotating rod (61) through the cooperation between the threaded portion (611) on the first rotating rod (61) and the internal thread (621) on the adjusting block (62); the first core shaft (3) is provided with a plurality of through grooves corresponding to each slide rod (63) and through which the slide rod (63) can pass; one end of each slide rod (63) is slidably connected to the adjusting block (62) along the extension direction of the upper side wall of the adjusting block (62); the other end of each slide rod (63) is fixedly connected to the pressing plate (64) after passing through the corresponding through groove; each pressing plate (64) is pressed on the disc spring through the sliding connection between the first rotating rod (61) and the adjusting block (62) and the sliding cooperation between the slide rod (63) and the adjusting block (62); The second core shaft (4) is provided with a second recessed groove coaxially arranged with the second core shaft (4); a through hole on a rotating shaft (21) connected to the second core shaft (4) is communicated with the second recessed groove; a pressing assembly (7) for pressing the large end surface of the disc spring is provided in the second core shaft (4); the pressing assembly (7) comprises a second rotating rod (71) coaxially arranged with the second recessed groove, a transmission gear (72), a plurality of racks (73) and an adjustment plate (74) corresponding to each rack (73); one end of the second rotating rod (71) is rotatably connected in the second recessed groove; the other end of the second rotating rod (71) extends out of the through hole; a transmission gear (72) is provided at one end of the second rotating rod (71) located in the second recessed groove; a gear groove (75) for the transmission gear (72) to rotate is provided in the second recessed groove; and a plurality of lifting and lowering parts are provided on the pressing surface. The lifting grooves (411) are arranged in a circular array on the pressure surface along the axis of the second spindle (4), and the lifting grooves (411) extend outwardly along the vertical direction of the second spindle (4) to the outside of the second spindle (4). Each adjustment plate (74) is lifted and arranged in the corresponding lifting groove (411). Each lifting groove (411) is provided with a connecting groove (76). Both sides of the connecting groove (76) are respectively connected to the gear groove (75) and the lifting groove (411). The bottom of each lifting plate is provided with a rack (73) that can pass through the connecting groove (76) and then be matched with the transmission gear (72). Each adjustment plate (74) is lifted and arranged in the corresponding lifting groove (411) through the rotation of the second rotating rod (71) and the transmission matching between the transmission gear (72) and the rack (73).

2. The multifunctional measuring device for coaxiality of elastic thin-walled disc spring according to claim 1 is characterized in that: Each pressing plate (64) is arc-shaped, and the arc surface on each pressing plate (64) is coplanar with the guide arc surface (31) when the pressing plate (64) is not extended, and the pressing plate (64) is provided with a plurality of arc-shaped slots (641) for one end of the disc spring to be inserted into.

3. The multifunctional measuring device for coaxiality of elastic thin-walled disc spring according to claim 2 is characterized in that: Each connecting groove (76) is provided with a slide rail (751), each rack (73) is provided with a slider (731) at the bottom, each rack (73) is slidably arranged in the connecting groove (76) through the cooperation of each slider (731) and the corresponding slide rail (751), each rack (73) is provided with a limit block (732), a limit baffle (752) is provided in the connecting groove (76), and the limit block (732) on each rack (73) is used to slide and limit each rack (73) by cooperating with the limit baffle (752).

4. The multifunctional measuring device for coaxiality of elastic thin-walled disc spring according to claim 3 is characterized in that: The cross section of each lifting groove (411) is T-shaped, and the cross section of each adjustment plate (74) is also T-shaped. The outer surface of each adjustment plate (74) is coplanar with the pressing surface. The end surface of each adjustment plate (74) away from the rack (73) is arc-shaped and is coplanar with the side surface of the pressing block (41) when the adjustment plate (74) is not lifted.

5. The multifunctional measuring device for coaxiality of elastic thin-walled disc spring according to claim 4 is characterized in that: The pressing surface is provided with a friction layer (741) which can prevent the disc spring from moving after pressing.

6. The multifunctional measuring device for coaxiality of elastic thin-walled disc spring according to claim 5, characterized in that: A meter frame (51) is slidably provided on the base (1), a meter base (5) is rotatably provided on the meter frame (51), a rotation axis of the meter base (5) is perpendicular to the base (1), and the dial indicator (52) is fixed on the meter base (5).

7. A measuring method, comprising the multifunctional measuring device for coaxiality of elastic thin-walled disc springs according to claim 6, characterized in that The following steps are involved: A. Measure the size of the large end surface of the disc spring; B. Rotate the second rotating rod (71) to extend each second adjusting plate (74) to a size that is the same as or similar to the large end surface, move the movable brackets (2) at both ends to slide relatively until the first core shaft (3) extends into the disc spring, the large end surface of the disc spring is pressed against the pressing surface, and then lock each movable bracket (2) through a locking member; C. Rotate the first rotating rod (61) to extend each pressing plate (64) to compress the disc spring, thereby ensuring the coaxiality between the disc spring and the first core shaft (3); D. Move the meter frame (51), rotate the meter base (5) until the dial indicator (52) is located at the upper end of the disc spring, and lower the position of the dial indicator (52) until the measuring head (53) is pressed against the outer wall of the disc spring; E. Rotate the shaft (21) slowly and evenly, observe the fluctuation of the pointer of the dial indicator (52), and take half of the difference between the maximum and minimum values ​​as the coaxiality deviation value, and compare it with the range of the standard error value.

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