Device for measuring tooth pitch deviation of gear

Abstract

The invention relates to the technical field of gear precision detection, in particular to a gear pitch deviation measuring device which comprises a testing platform, a measuring support plate is arranged on one side of the top of the testing platform, a clamping mechanism is fixedly mounted in the measuring support plate, and a measuring surface processing mechanism is arranged on the clamping mechanism. A rotary limiting mechanism is arranged on the clamping mechanism; a detected gear is clamped and fixed through the clamping mechanism, and the axis of a central shaft of the gear is gradually overlapped with the central axis of the clamping disc through the shaft alignment adjusting mechanism in the clamping process, so that the shaft alignment precision of the gear is guaranteed; in the clamping process, a measuring surface processing mechanism is matched to clean the surfaces of the teeth on the gear, so that the phenomenon that residual impurities on the teeth are in contact with a detection probe in the detection process to generate measurement errors is avoided; in the measurement process, the rotation limiting mechanism is utilized to enable the angular offset of each rotation of the clamping disc to be consistent during tooth profile detection, so that the measurement precision of the device is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gear precision detection, and particularly relates to a gear tooth pitch deviation measuring device. BACKGROUND

[0002] A gear is an important part of rotary transmission, and ideal transmission of the gear is uniform speed, smooth and vibration-free. However, the existence of tooth pitch deviation directly destroys the ideal state. For a gear with large error, there is deviation between the actual rotation angle and the theoretical rotation angle per revolution. The error will cause the speed to change suddenly at the moment of meshing in and out of each tooth, and acceleration impact is generated. The gear with deviation is prone to positional deviation and non-uniform rotation speed during transmission rotation. Therefore, after processing is completed, a tooth pitch deviation measuring device needs to be used to detect the manufacturing precision of the gear. A gear measuring center is used for traditional measurement, and the gear measuring center is a highly professional precision instrument with extremely high price. A roughness profilometer has compact structure and low price, can measure micro height and horizontal profile, and can greatly reduce measurement cost when applied to tooth pitch deviation measurement of the gear. However, the shafting precision of the gear needs to be high during detection, and measurement error will be caused by deviation of the shafting precision. Therefore, it is necessary to design a gear tooth pitch deviation measuring device. SUMMARY

[0003] The application aims to provide a gear tooth pitch deviation measuring device with simple structure and reasonable design.

[0004] The application achieves the above-mentioned purpose through the following technical scheme. The gear tooth pitch deviation measuring device comprises a test platform, a measuring support plate is arranged on one side of the top of the test platform, a clamping mechanism is fixedly installed on the measuring support plate, a measuring surface processing mechanism is arranged on the clamping mechanism, a rotation limiting mechanism is arranged on the clamping mechanism, a control module is installed on one side of the test platform, and a measuring mechanism is arranged on the top of the measuring support plate. The clamping mechanism comprises a lower support fixed on the measuring support plate, a double-head screw is rotationally connected in the lower support, clamping plates are symmetrically arranged on the double-head screw, support blocks are arranged on the top of the clamping plates, the support blocks are slidingly connected in the sliding grooves formed in the outer wall of the clamping disc, and an axis adjustment mechanism is arranged between the clamping discs.

[0005] As a further optimization scheme of the application, the axis adjustment mechanism comprises a center sleeve rotationally connected in the clamping disc, support sliding grooves are uniformly formed in the side wall of the center sleeve, iron sliding blocks are slidingly connected in the support sliding grooves, and support wheels are rotationally connected on the iron sliding blocks.

[0006] As a further optimization scheme of the present application, a fixed sleeve is fixedly connected in the center sleeve, the fixed sleeve is connected with a transmission lead screw, one end of the transmission lead screw is fixedly connected with a conical magnetic block, and the ferrous slide block is slidingly connected on the side wall of the conical magnetic block.

[0007] As a further optimization scheme of the present application, one end of the center sleeve is fixedly connected with a limiting ring, the limiting ring is slidingly connected in the limiting frame, and a friction surface is arranged on the contact surface of the limiting ring and the limiting frame, the limiting frame is fixedly connected with the output end of a limiting cylinder, and the limiting cylinder is fixedly installed on one side of the lower support.

[0008] As a further optimization scheme of the present application, a square groove is formed in the transmission lead screw, and a transmission bar is slidingly connected in the square groove, the transmission bar is fixedly connected with the output end of a servo motor, and the servo motor is fixed on the measuring support plate.

[0009] As a further optimization scheme of the present application, supporting frames are symmetrically arranged on the clamping disc, elastic supports are slidingly connected in the supporting frames, supporting springs are arranged between the elastic supports and the supporting frames, limiting rollers are rotatably connected on the elastic supports, limiting rods are sleeved in the through holes formed in the elastic supports, the limiting rods are slidingly connected in the sliding grooves formed in the supporting frames, and adjacent end portions of the limiting rods are connected through connecting sleeves.

[0010] As a further optimization scheme of the present application, the rotation limiting mechanism comprises a mounting block fixed on one side clamping plate, a locking cylinder is fixedly installed in the mounting block, a dividing slide block is fixedly connected with the output end of the locking cylinder, and the dividing slide block is inserted in a dividing groove, the dividing grooves are uniformly formed on the side wall of the clamping disc.

[0011] As a further optimization scheme of the present application, the measuring surface processing mechanism comprises a first support column rotatably connected on the lower support, a side support is arranged on one side of the lower support, a second support column is rotatably connected on the side support, a first connecting belt is connected between the first support column and the second support column through the groove formed on the side wall, and a roller brush is sleeved on the first support column.

[0012] As a further optimization scheme of the present application, a second connecting belt is wound around the groove formed on the top of the second support column, the second connecting belt is wound around the groove of a third support column, and one end of the third support column is fixed on the center sleeve.

[0013] As a further optimization scheme of the present application, the measuring mechanism comprises a support shell fixed on the measuring support plate, a lifting lead screw is rotatably connected in the support shell, a lifting shell is arranged on the lifting lead screw, the lifting shell slides in the through slot opened on one side of the support shell, a display screen is embedded and installed on one side of the lifting shell, a measuring cylinder is fixedly installed in the lifting shell, a pressure sensor is arranged on the output end of the measuring cylinder, a detection probe is arranged on the pressure sensor, a lifting motor is fixedly connected to the bottom of the measuring support plate, and the output end of the lifting motor is fixedly connected to the bottom end of the lifting lead screw.

[0014] The present application has the following advantages: In the process of installing the gear, the servo motor drives the transmission lead screw to rotate through the transmission belt, the fixed sleeve is limited from rotating due to the friction between the limiting ring and the limiting frame during the rotation of the transmission lead screw, at this time, the rotation of the transmission lead screw will make the transmission lead screw and the conical magnetic block slide into the inside of the center sleeve through the cooperation with the fixed sleeve, the conical magnetic block will extrude the iron slide block to slide out of the center sleeve through the conical side wall on the conical magnetic block during the sliding of the conical magnetic block, the four groups of iron slide blocks and the supporting wheels slide synchronously, the four groups of supporting wheels will press the inner wall of the center hole of the gear during the synchronous outward movement, so that the central axis of the gear gradually coincides with the central axis of the chuck, thereby ensuring the axial precision of the gear.

[0015] During the rotation of the chucked gear and the center sleeve, the second support column can be driven to rotate through the second connecting belt, and then the rollers on the first support column can be driven to rotate synchronously through the first connecting belt, the rollers can clean the surface of the teeth of the gear during the rotation of the rollers, so as to avoid that the impurities remaining on the teeth contact the detection probe during the detection process and cause measurement error.

[0016] During the process of sequentially measuring all the teeth of the gear, the center sleeve and the gear are driven to rotate by an angular offset of a tooth through the servo motor, then the servo motor stops rotating while the locking cylinder is used to drive the indexing slide block to move towards the chuck, after the indexing slide block gradually contacts the indexing groove, the rotation angle of the entire chuck is locked, so that the angular offset of the chuck during each rotation is kept consistent during the gear detection, thereby ensuring the measurement accuracy of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of part of the structure of the present application; Figure 3 It is a schematic diagram of the installation position of the lifting motor in the present application; Figure 4 It is an exploded view of part of the structure of the present application; Figure 5is the assembly structure schematic view of the shaft adjusting mechanism in the application; Figure 6 is the assembly structure schematic view of the clamping mechanism in the application; Figure 7 is Figure 6 is the local enlarged view of the A area in the figure; Figure 8 is the assembly schematic view of the first connecting belt, the second connecting belt and the second support column.

[0018] In the figure: 1, test platform; 2, measurement support plate; 3, clamping mechanism; 4, shaft adjusting mechanism; 6, measurement surface processing mechanism; 7, rotation limiting mechanism; 8, measurement mechanism; 30, connecting sleeve; 31, lower support; 32, double-end screw; 33, clamping plate; 34, support block; 35, clamping disc; 36, support frame; 37, elastic support; 38, support spring; 39, limiting roller; 40, limiting rod; 41, center sleeve; 42, iron slide block; 43, support wheel; 44, fixed sleeve; 45, transmission screw; 46, conical magnetic block; 47, limiting ring; 48, limiting frame; 49, limiting cylinder; 50, transmission bar; 51, servo motor; 61, first support column; 62, side support; 63, second support column; 64, first connecting belt; 65, roller brush; 66, second connecting belt; 67, third support column; 71, mounting block; 72, locking cylinder; 73, indexing slide block; 74, indexing groove; 81, support shell; 82, lifting screw; 83, lifting shell; 84, measurement cylinder; 85, detection probe; 86, lifting motor. DETAILED DESCRIPTION

[0019] The following further describes the application in conjunction with the drawings. It is necessary to point out here that the following detailed description is only used to further describe the application and cannot be understood as limiting the protection scope of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0020] Embodiment: please refer to Figures 1-8, for gear tooth pitch deviation measuring device, including test platform 1, the top side of test platform 1 is provided with measuring support plate 2, measuring support plate 2 is fixedly installed with clamping mechanism 3, clamping mechanism 3 is used to fix the gear needing to be detected, measuring face processing mechanism 6 is provided on clamping mechanism 3, measuring face processing mechanism 6 is used to clean the detection surface of gear during clamping, to avoid the influence of residual impurities on the detection surface on detection accuracy, rotating limiting mechanism 7 is provided on clamping mechanism 3, rotating limiting mechanism 7 can guarantee that the angular offset of gear rotation is consistent each time, a control module is installed on one side of test platform 1, measuring mechanism 8 is provided on the top of measuring support plate 2, detecting probe 85 is installed in measuring mechanism 8 for completing gear tooth profile detection, detection data is transmitted to control module for analysis, and then the tooth pitch deviation of gear is detected through all tooth profile data.

[0021] Please refer to Figures 3-4 And Figures 6-7 , clamping mechanism 3 includes lower support 31 fixed on measuring support plate 2 through bolts, double-head screw 32 is rotatably connected in lower support 31 through bearings, screw groove symmetrically opened on both ends of double-head screw 32 is matched and connected with clamping plate 33, one end of double-head screw 32 passes through clamping plate 33 and is connected with knob, two clamping plates 33 can be synchronously close or far away from each other following the rotation of double-head screw 32, support block 34 is provided on the top of clamping plate 33 and is slidingly connected in the sliding slot opened in the outer wall of clamping disc 35, the sliding of clamping disc 35 is limited by the support block 34 arranged, so that clamping disc 35 can rotate around its own axis; shaft adjusting mechanism 4 is arranged between two clamping discs 35, four groups of support frames 36 are symmetrically arranged on clamping disc 35, elastic support 37 is slidingly connected in the groove opened on support frame 36, support spring 38 is arranged between elastic support 37 and support frame 36, support spring 38 is located inside the groove opened on support frame 36, limiting roller 39 is symmetrically rotatably connected on elastic support 37 through bearings, limiting rod 40 is sleeved in the through hole opened on elastic support 37, limiting rod 40 is slidingly connected in the sliding slot opened on support frame 36, adjacent limiting rods 40 are fixed end to end through connecting sleeve 30, the quadrilateral frame formed by connecting sleeve 30 and limiting rod 40 limits elastic support 37, so that four groups of elastic supports 37 are on the same vertical plane.

[0022] Please refer to Figures 3-7The shaft adjusting mechanism 4 comprises a central sleeve 41 rotatably connected in the clamping disc 35, the side wall of the central sleeve 41 is uniformly provided with a supporting sliding groove, the supporting sliding groove is slidably connected with an iron sliding block 42, the iron sliding block 42 is rotatably connected with a supporting wheel 43 through a bearing, the central sleeve 41 is fixedly provided with a fixed sleeve 44, the fixed sleeve 44 is connected with a transmission screw rod 45 through a ball nut embedded in the inside, one end of the transmission screw rod 45 is fixedly connected with a conical magnetic block 46, the iron sliding block 42 is magnetically adhered to the conical magnetic block 46 and slides on the conical side wall of the conical magnetic block 46, one end of the central sleeve 41 is fixedly locked in a limiting ring 47, the limiting ring 47 is slidably connected in the groove at the top of a limiting frame 48, the limiting frame 48 is fixedly connected with the output end of a limiting air cylinder 49, and the limiting air cylinder 49 is fixedly installed on one side of the lower support 31 through a support, a square groove is formed in the transmission screw rod 45, and a square transmission bar 50 is slidably connected in the square groove, the transmission bar 50 is fixedly connected with the output end of a servo motor 51 through a flange plate, and the servo motor 51 is fixedly supported on the measuring support plate 2 through a support.

[0023] Please refer to Figure 4 and Figure 6 The rotation limiting mechanism 7 comprises a mounting block 71 fixed on one side clamping plate 33, the mounting block 71 is fixedly connected with a locking air cylinder 72, the output end of the locking air cylinder 72 is fixedly connected with a indexing sliding block 73, and the indexing sliding block 73 is inserted in an indexing groove 74, the indexing groove 74 is uniformly formed in the side wall of the clamping disc 35, the indexing groove 74 is circumferentially distributed on the side edge of the clamping disc 35, and the shape of the indexing groove 74 corresponds to the indexing sliding block 73, before measurement, the locking air cylinder 72 drives the indexing sliding block 73 to approach the clamping disc 35, after the indexing sliding block 73 gradually contacts the indexing groove 74, the rotation angle of the entire clamping disc 35 is locked, and the angular offset of the clamping disc 35 during each rotation during gear detection is kept consistent.

[0024] Please refer to Figures 3-6 and Figure 8 The measuring surface processing mechanism 6 comprises a first support 61 rotatably connected to the lower support 31, one side of the lower support 31 is provided with a side support 62, the side support 62 is rotatably connected with a second support 63, the first support 61 and the second support 63 are wound with a first connecting belt 64, the first support 61 is fixedly sleeved with a roller brush 65 with a cleaning brush, the second support 63 is wound with a second connecting belt 66, the second connecting belt 66 is wound on a third support 67, one end of the third support 67 is fixed on one end of the central sleeve 41, the central sleeve 41 can drive the second support 63 to rotate through the second connecting belt 66 during rotation, then the roller brush 65 on the first support 61 is synchronously rotated through the first connecting belt 64, and the teeth on the gear can be surface cleaned during the rotation of the roller brush 65.

[0025] Please refer to Figures 1-3 , the measuring mechanism 8 comprises a support shell 81 fixed on the measuring branch plate 2, the support shell 81 is rotatably connected with lifting lead screw 82 through bearing, lifting lead screw 82 is provided with lifting shell 83, lifting shell 83 is connected with lifting lead screw 82 through the ball nut of internal embedding installation and each other, lifting shell 83 slides in the through slot of the one side of support shell 81, prevent lifting shell 83 from generating relative rotation in the process of moving up and down, the one side of lifting shell 83 is embedded with display screen, and lifting shell 83 is fixedly installed with measuring cylinder 84, the output end of measuring cylinder 84 is provided with pressure sensor, pressure sensor is provided with detection probe 85, the bottom of measuring branch plate 2 is fixedly connected with lifting motor 86, and the output end of lifting motor 86 is fixedly connected at the bottom end of lifting lead screw 82, when measuring, lifting lead screw 82 is driven to rotate by lifting motor 86, the cooperation of lifting lead screw 82 and lifting shell 83 is utilized, drives the whole lifting shell 83 to move up and down along the axis of lifting lead screw 82, makes the height of detection probe 85 and the axis height of detection gear consistent, then drives detection probe 85 to extend by measuring cylinder 84, in the process, pressure sensor collects the pressure received by detection probe 85, and transmits data to control module, after control module monitors that pressure sensor receives pressure, it is judged that detection probe 85 contacts the surface of gear, and then the tooth profile of gear is measured in combination with the movement stroke of the output end of measuring cylinder 84, then all tooth profile data are detected in turn, and the deviation measurement process of gear pitch is completed.

[0026] It should be noted that the gear tooth pitch deviation measuring device, in use, first places the gear to be measured between the two clamping discs 35, then inserts the center sleeve 41 into the two clamping discs 35, at the same time makes the center sleeve 41 pass through the center hole of the gear, then manually rotates the knob at one end of the double-headed screw 32, the double-headed screw 32 rotates in the process will drive the two sides of the clamping plate 33 to synchronize close, the limiting roller 39 on the elastic support 37 on both sides is adhered to the two sides of the gear through the supporting spring 38 to realize the preliminary fixation of the gear; the limiting cylinder 49 drives the limiting frame 48 to move upwards, the limiting frame 48 is sleeved on the bottom edge of the limiting ring 47, which can prevent the center sleeve 41 from sliding left and right, then the servo motor 51 drives the transmission screw 45 to rotate through the transmission bar 50, the fixed sleeve 44 will be limited to rotate due to the friction between the limiting ring 47 and the limiting frame 48 in the process of rotation of the transmission screw 45, at this time the rotation of the transmission screw 45 will make the transmission screw 45 and the conical magnetic block 46 slide to the inside of the center sleeve 41 through the cooperation with the fixed sleeve 44, the conical magnetic block 46 will slide in the process of sliding through the conical side wall on the conical magnetic block 46 extruding the iron slide block 42 to the outside of the center sleeve 41, the four groups of iron slide blocks 42 and the supporting wheels 43 slide synchronously, the four groups of supporting wheels 43 synchronously move outwards in the process of synchronous movement, which will press the inner wall of the center hole of the gear to make the center axis of the gear gradually coincide with the center axis of the clamping disc 35, after complete coincidence, the movement of the supporting wheel 43 is locked by the center hole of the gear, at this time the fixed sleeve 44 will not produce relative rotation with the transmission screw 45, at this time the position between the fixed sleeve 44 and the transmission screw 45 is relatively locked, the rotation torque of the transmission screw 45 directly acts on the center sleeve 41 and the fixed sleeve 44, the fixed sleeve 44 and the center sleeve 41 will rotate synchronously with the transmission screw 45, then rotate the double-headed screw 32 again, make the two sides of the supporting block 34 close again, at the same time extrude the supporting spring 38 to make the elastic support 37 completely enter the inside of the supporting block 34, then the supporting block 34 replaces the elastic support 37 to completely fix the gear on both sides, at this time the clamping disc 35 can rotate synchronously with the gear, in the process of rotation of the gear and the center sleeve 41, the second support 63 can be driven to rotate through the second connecting belt 66, then the roller brush 65 on the first support 61 is driven to rotate synchronously through the first connecting belt 64, the roller brush 65 can clean the surface of the gear teeth in the process of rotation.After that, the cooperation of the lifting screw 82 and the lifting shell 83 drives the whole lifting shell 83 to move up and down along the axis of the lifting screw 82, so that the height of the detection probe 85 is consistent with the axis height of the detection gear, then the detection probe 85 is extended by the measuring cylinder 84, in the process, the pressure sensor collects the pressure received by the detection probe 85 and transmits the data to the control module, and the control module determines that the detection probe 85 contacts the surface of the gear after monitoring the pressure sensor receiving pressure, and then combines the movement of the output end of the measuring cylinder 84 to measure the tooth profile of the gear, then the detection probe 85 is returned to the home position by the measuring cylinder 84, then the center sleeve 41 and the gear are rotated by an angular offset of a tooth by the servo motor 51, then the servo motor 51 stops rotating while the locking cylinder 72 is used to drive the indexing slider 73 to move close to the clamping disc 35, after the indexing slider 73 gradually contacts the indexing groove 74, the rotation angle of the whole clamping disc 35 is locked, so that the angular offset of the clamping disc 35 is consistent during the tooth profile detection, then all tooth profile data are detected in turn by the reciprocating operation of the control module driving the locking cylinder 72, the measuring cylinder 84 and the servo motor 51, and the deviation measurement process of the gear tooth pitch is completed.

[0027] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A device for measuring gear pitch deviation, comprising a test platform, characterized in that: A measuring support plate is provided on one side of the top of the test platform. A clamping mechanism is fixedly installed on the measuring support plate. A measuring surface processing mechanism is provided on the clamping mechanism. A rotation limiting mechanism is provided on the clamping mechanism. A control module is installed on one side of the test platform. A measuring mechanism is provided on the top of the measuring support plate. The clamping mechanism includes a lower support fixed to the measuring support plate, a double-ended screw rotatably connected to the lower support, clamping plates symmetrically arranged on the double-ended screw, a support block on the top of the clamping plate, and the support block slidably connected to a groove opened in the outer wall of the clamping plate; an axis adjustment mechanism is provided between the clamping plates.

2. The gear pitch deviation measuring device according to claim 1, characterized in that: The shaft adjustment mechanism includes a central sleeve rotatably connected in the clamping plate. Support grooves are evenly provided on the side wall of the central sleeve. An iron slider is slidably connected in the support groove, and a support wheel is rotatably connected to the iron slider.

3. The device for measuring gear pitch deviation according to claim 2, characterized in that: A fixed sleeve is fixedly connected to the central sleeve. The fixed sleeve is connected to a transmission screw. One end of the transmission screw is fixedly connected to a conical magnetic block. The iron slider is slidably connected to the side wall of the conical magnetic block.

4. The gear pitch deviation measuring device according to claim 3, characterized in that: One end of the central sleeve is fixedly connected to a limiting ring, the limiting ring is slidably connected in the limiting frame, and the contact surface between the limiting ring and the limiting frame is provided with a friction surface. The limiting frame is fixedly connected to the output end of the limiting cylinder, and the limiting cylinder is fixedly installed on one side of the lower support.

5. The gear pitch deviation measuring device according to claim 3, characterized in that: The transmission screw has a square groove, and a transmission bar is slidably connected in the square groove. The transmission bar is fixedly connected to the output end of the servo motor, and the servo motor is fixed on the measuring support plate.

6. The gear pitch deviation measuring device according to claim 1, characterized in that: The clamping plate is symmetrically provided with support frames, and elastic brackets are slidably connected in the support frames. A support spring is provided between the elastic brackets and the support frames. A limiting roller is rotatably connected to the elastic brackets. A limiting rod is sleeved in a through hole opened in the elastic brackets. The limiting rod is slidably connected in a groove opened in the support frame. The ends of adjacent limiting rods are connected by a connecting sleeve.

7. The gear pitch deviation measuring device according to claim 1, characterized in that: The rotation limiting mechanism includes a mounting block fixed on one side of the clamping plate. A locking cylinder is fixedly installed in the mounting block. The output end of the locking cylinder is fixedly connected to an indexing slider, which is inserted into an indexing groove. The indexing groove is evenly opened on the side wall of the clamping plate.

8. The gear pitch deviation measuring device according to claim 1, characterized in that: The measuring surface processing mechanism includes a first pillar rotatably connected to a lower support, a side bracket provided on one side of the lower support, a second pillar rotatably connected to the side bracket, the first pillar and the second pillar being connected by a first connecting belt through a groove in the side wall, and a roller brush sleeved on the first pillar.

9. The gear pitch deviation measuring device according to claim 8, characterized in that: The second connecting strip is wrapped around the groove at the top of the second pillar, and the second connecting strip is wrapped around the groove of the third pillar. One end of the third pillar is fixed to the central sleeve.

10. The gear pitch deviation measuring device according to claim 1, characterized in that: The measuring mechanism includes a support shell fixed to a measuring support plate, a lifting screw rotatably connected to the support shell, a lifting housing mounted on the lifting screw, the lifting housing sliding in a through groove on one side of the support shell, a display screen embedded in one side of the lifting housing, and a measuring cylinder fixedly mounted in the lifting housing. A pressure sensor is mounted on the output end of the measuring cylinder, and a detection probe is mounted on the pressure sensor. A lifting motor is fixedly connected to the bottom of the measuring support plate, and the output end of the lifting motor is fixedly connected to the bottom end of the lifting screw.

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