CN113124736A

CN113124736A - Workpiece roundness measuring device convenient for reading

Info

Publication number: CN113124736A
Application number: CN202110253598.5A
Authority: CN
Inventors: 吴胜伟
Original assignee: Nanjing O'neishi Automobile Products Co ltd
Current assignee: Nanjing O'neishi Automobile Products Co ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-07-16

Abstract

The invention relates to the field of data identification and relates to a workpiece roundness measuring device convenient for reading, which comprises a main box body, wherein a measuring cavity with a right opening is arranged in the main box body, the upper end wall of the measuring cavity is communicated with a measuring box cavity with a right opening, the left end wall of the measuring cavity is communicated with a three-jaw chuck cavity, the left side of the three-jaw chuck cavity is provided with a rotating bevel gear cavity, the upper side of the rotating bevel gear cavity is provided with a rotating gear cavity, the right end wall of the rotating gear cavity is communicated with a switching gear cavity, a sensing rod is moved downwards to automatically adapt to the radius of a workpiece to be measured, the workpiece is rotated to reflect the roundness change on graduated paper, the roundness of the workpiece can be obtained by processing data, the workload of operators is reduced, the measuring efficiency and the measuring accuracy are improved, in addition, the graduated paper is automatically updated when the roundness measurement is carried out on different sections of the workpiece, convenient for observation and recording.

Description

Workpiece roundness measuring device convenient for reading

Technical Field

The invention relates to the field of data identification, in particular to a workpiece roundness measuring device convenient for reading.

Background

Generally will the amesdial measuring rod butt when work piece roundness measurement is at the outer terminal surface of the work piece of being surveyed, rotate the work piece afterwards and read the amesdial reading and accomplish the measurement, this kind of mode wastes time and energy, has reduced measurement efficiency, and the artifical mode of rotating the work piece leads to the fact the skew of work piece easily moreover, has reduced measuring accuracy, in addition, in the measurement process, the general real-time change of reading of amesdial, the operating personnel is difficult to observe effective data, has increased the degree of difficulty that data acquireed.

Disclosure of Invention

The invention aims to provide a workpiece roundness measuring device convenient for reading, which can overcome the defects in the prior art, thereby improving the practicability of equipment.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a workpiece roundness measuring device convenient for reading, which comprises a main box body, wherein a measuring cavity with a right opening is arranged in the main box body, the upper end wall of the measuring cavity is communicated with a measuring box cavity with a right opening, the left end wall of the measuring cavity is communicated with a three-jaw chuck cavity, the left side of the three-jaw chuck cavity is provided with a rotating bevel gear cavity, the upper side of the rotating bevel gear cavity is provided with a rotating gear cavity, the right end wall of the rotating gear cavity is communicated with a switching gear cavity, the right end wall of the switching gear cavity is communicated with a lifting gear cavity, the left end wall of the three-jaw chuck cavity is rotationally matched and connected with a three-jaw chuck shaft which extends rightwards into the three-jaw chuck cavity and leftwards into the rotating bevel gear cavity, the right end surface of the three-jaw chuck shaft is fixedly connected with a three-jaw chuck positioned in the three-jaw chuck cavity, the lower end wall of the lifting gear cavity is rotationally matched and connected with a lifting screw rod which, the lifting screw is connected with a lifting nut in a threaded fit manner, the right end face of the lifting nut is fixedly connected with a guide plate, a rack is arranged in the guide plate, a measuring box is connected in a sliding fit manner in a measuring box cavity, a guide plate cavity which is communicated with the left and right is arranged in the measuring box, the guide plate cavity is connected with the guide plate in a sliding fit manner, a sensing rod cavity with a downward opening is arranged in the measuring box, the right end wall of the sensing rod cavity is communicated with a graduated paper cavity with a rightward opening, a sensing rod which extends downwards into the measuring cavity is connected in the sensing rod cavity in a sliding fit manner, a sensing spring is fixedly connected between the upper end face of the sensing rod and the upper end wall of the sensing rod cavity, a recording bevel gear cavity is arranged at the upper side of the graduated paper cavity, a rack gear cavity is arranged at the front side of the recording bevel gear cavity, and, the utility model discloses a take turns the intracavity, the recording bevel gear intracavity is equipped with the recording bevel gear, the recording bevel gear intracavity is equipped with the belt wheel chamber, the recording bevel gear intracavity front end wall normal running fit is connected and extends to backward the recording intermediate shaft in the recording bevel gear intracavity and extends to forward the rack gear in the rack gear intracavity, fixedly connected with is located on the recording intermediate shaft the rack gear of rack gear intracavity, it is located to go back fixedly connected with on the recording intermediate shaft the main recording bevel gear of recording bevel gear intracavity, the recording bevel gear intracavity lower end wall normal running fit is connected with and upwards extends to the recording bevel gear intracavity and downwards run through the scale paper chamber and downwards extend to the initiative fiber container axle of belt wheel intracavity, the epaxial fixedly connected with of initiative fiber container is located the initiative fiber container of scale paper intracavity.

On the basis of the technical scheme, the driving paper tube shaft is fixedly connected with a driven recording bevel gear which is positioned in the belt wheel cavity, the driven recording bevel gear is meshed with the main recording bevel gear, the driving paper tube shaft is also fixedly connected with a driving belt wheel which is positioned in the belt wheel cavity, the upper end wall of the belt wheel cavity is connected with a driven paper tube shaft which extends downwards into the belt wheel cavity and upwards penetrates through the scale paper cavity in a rotating fit manner, the driven paper tube shaft is fixedly connected with a driven paper tube which is positioned in the scale paper cavity, scale paper is fixedly connected between the driven paper tube and the driving paper tube, the driven paper tube shaft is also fixedly connected with a driven belt wheel which is positioned in the belt wheel cavity, and a conveying belt is connected between the driven belt wheel and the driving belt wheel in a power fit manner.

On the basis of the technical scheme, a marker pen cavity with a right opening is arranged in the induction rod, a push block cavity is communicated with the upper end wall of the marker pen cavity, a marker pen extending rightwards into the graduated paper cavity is connected in the marker pen cavity in a sliding fit manner, a push block connected with the push block cavity in a sliding fit manner is fixedly connected with the upper end surface of the marker pen, a push block spring is fixedly connected between the left end surface of the push block and the left end wall of the push block cavity, a middle slide block cavity with a left opening and positioned at the upper side of the push block cavity is arranged in the induction rod, a middle slide block is connected in the middle slide block cavity in a sliding fit manner, a middle spring is fixedly connected between the right end surface of the middle slide block and the right end wall of the middle slide block cavity, a middle pull rope is also fixedly connected with the right end surface of the middle slide block, the other end of the middle pull rope is fixedly connected with the right end surface of the, the trigger device is characterized in that a trigger slider is connected in the trigger slider cavity in a sliding fit manner, a trigger spring is fixedly connected between the left end face of the trigger slider and the left end wall of the trigger slider cavity, and a contact switch located on the right side of the trigger slider is fixedly connected to the upper end wall of the trigger slider cavity.

On the basis of the technical scheme, be equipped with in the headstock and be located the motor of switching gear chamber upside, end wall fixed connection downwardly extending under the motor driving shaft in the switching gear intracavity, spline fit is connected with the switching sleeve on the driving shaft, fixedly connected with is located on the switching sleeve switching gear in the switching gear intracavity, terminal surface normal running fit is connected with the switching dish under the switching sleeve, under the switching dish terminal surface with fixedly connected with switching spring between the end wall under the switching gear chamber, switching gear chamber end wall fixed connection downwardly extending the electro-magnet in the headstock.

On the basis of the technical scheme, the lifting screw is fixedly connected with a lifting gear located in the lifting gear cavity, the lifting gear is meshed with the switching gear, the upper end wall of the rotating gear cavity is connected with a rotating intermediate shaft which extends upwards into the rotating gear cavity and downwards into the rotating bevel gear cavity in a rotating matching mode, the rotating intermediate shaft is fixedly connected with a rotating gear located in the rotating gear cavity, the rotating intermediate shaft is further fixedly connected with a main rotating bevel gear located in the rotating bevel gear cavity, and the main rotating bevel gear is meshed with the auxiliary rotating bevel gear.

The invention has the beneficial effects that: the induction rod moves downwards to automatically adapt to the radius of the workpiece to be measured, the workpiece is rotated to reflect the roundness change on the scale paper, the roundness of the workpiece can be obtained by processing data, the workload of operators is reduced, the measurement efficiency and accuracy are improved, in addition, the scale paper is automatically updated when the roundness of different sections of the workpiece is measured, the part recorded with the measurement result last time can also be moved out, and the observation and the recording are convenient.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of a workpiece roundness measuring device convenient for reading according to the present invention.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic sectional structure view of B-B in fig. 2.

Fig. 4 is an enlarged schematic view of the structure at C in fig. 2.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The workpiece roundness measuring device convenient for reading comprises a main box body 10, wherein a measuring cavity 11 with a right opening is arranged in the main box body 10, a measuring box cavity 31 with a right opening is communicated with the upper end wall of the measuring cavity 11, a three-jaw chuck cavity 12 is communicated with the left end wall of the measuring cavity 11, a rotating bevel gear cavity 16 is arranged on the left side of the three-jaw chuck cavity 12, a rotating gear cavity 22 is arranged on the upper side of the rotating bevel gear cavity 16, a switching gear cavity 25 is communicated with the right end wall of the rotating gear cavity 22, a lifting gear cavity 29 is communicated with the right end wall of the switching gear cavity 25, a three-jaw chuck shaft 14 extending rightwards into the three-jaw chuck cavity 12 and extending leftwards into the rotating bevel gear cavity 16 is connected with the left end wall of the three-jaw chuck cavity 12 in a rotating matching manner, a three-jaw 13 located in the three-jaw chuck cavity 12 is fixedly connected with the right end wall of the three-jaw chuck shaft 14, the lower end wall of the lifting gear cavity 29 is connected with a lifting screw 34 which extends upwards into the lifting gear cavity 29 and downwards penetrates through the measuring box cavity 31 in a rotating matching manner, the lifting screw 34 is connected with a lifting nut 33 in a threaded matching manner, the right end face of the lifting nut 33 is fixedly connected with a guide plate 35, a rack 38 is arranged in the guide plate 35, the measuring box cavity 31 is connected with a measuring box 36 in a sliding matching manner, a left-right through guide plate cavity 37 is arranged in the measuring box 36, the guide plate cavity 37 is connected with the guide plate 35 in a sliding matching manner, an induction rod cavity 39 with a downward opening is arranged in the measuring box 36, the right end wall of the induction rod cavity 39 is communicated with a graduated paper cavity 69 with a rightward opening, the induction rod cavity 39 is connected with an induction rod which extends downwards into the measuring cavity 11 in a sliding matching manner, and an induction spring 40 is fixedly connected between the upper end face of the induction rod 32 and the upper end, the upper side of the scale paper cavity 69 is provided with a recording bevel gear cavity 48, the front side of the recording bevel gear cavity 48 is provided with a rack gear cavity 52, the upper end wall of the rack gear cavity 52 is communicated with the lower end wall of the guide plate cavity 37, the lower side of the scale paper cavity 69 is provided with a belt wheel cavity 43, the front end wall of the recording bevel gear cavity 48 is connected with a recording intermediate shaft 50 which extends backwards into the recording bevel gear cavity 48 and forwards into the rack gear cavity 52 in a rotating fit manner, the recording intermediate shaft 50 is fixedly connected with a rack gear 51 positioned in the rack gear cavity 52, the rack gear 51 is meshed with the rack 38, the recording intermediate shaft 50 is also fixedly connected with a main recording bevel gear 49 positioned in the recording bevel gear cavity 48, the lower end wall of the recording bevel gear cavity 48 is connected with a driving paper tube shaft 46 which extends upwards into the recording bevel gear cavity 48, downwards penetrates through the scale paper cavity 69 and downwards into the belt wheel cavity 43 in a rotating fit manner, the driving paper tube 45 located in the scale paper cavity 69 is fixedly connected to the driving paper tube shaft 46.

In addition, in one embodiment, a slave recording bevel gear 47 located in the pulley chamber 43 is fixedly attached to the drive spool shaft 46, the slave recording bevel gear 47 is meshed with the master recording bevel gear 49, the driving paper tube shaft 46 is also fixedly connected with a driving belt wheel 44 positioned in the belt wheel cavity 43, the upper end wall of the belt wheel cavity 43 is connected with a driven paper tube shaft 55 which extends downwards into the belt wheel cavity 43 and upwards penetrates through the graduated paper cavity 69 in a rotating matching way, the driven paper tube shaft 55 is fixedly connected with a driven paper tube 54 positioned in the scale paper cavity 69, the scale paper 53 is fixedly connected between the driven paper tube 54 and the driving paper tube 45, the driven paper tube shaft 55 is also fixedly connected with a driven belt wheel 41 positioned in the belt wheel cavity 43, a transmission belt 42 is connected between the driven pulley 41 and the driving pulley 44 in a power fit manner.

In addition, in one embodiment, a marker cavity 57 with a right opening is arranged in the sensing rod 32, the upper end wall of the marker cavity 57 is communicated with a push block cavity 59, a marker 56 which extends to the right in the graduated paper cavity 69 is connected in a sliding fit manner in the marker cavity 57, a push block 58 which is connected with the push block cavity 59 in a sliding fit manner is fixedly connected to the upper end surface of the marker 56, a push block spring 60 is fixedly connected between the left end surface of the push block 58 and the left end wall of the push block cavity 59, an intermediate slide block cavity 65 which is provided with a left opening and is positioned at the upper side of the push block cavity 59 is arranged in the sensing rod 32, an intermediate slide block 66 is connected in a sliding fit manner in the intermediate slide block cavity 65, an intermediate spring 67 is fixedly connected between the right end surface of the intermediate slide block 66 and the right end wall of the intermediate slide block cavity 65, an intermediate pull rope 68 is also fixedly connected to the right end surface of the intermediate slide block 66, the left end wall of the induction rod cavity 39 is communicated with a trigger slide block cavity 64 located on the upper side of the middle slide block cavity 65, a trigger slide block 61 is connected in the trigger slide block cavity 64 in a sliding fit mode, a trigger spring 62 is fixedly connected between the left end face of the trigger slide block 61 and the left end wall of the trigger slide block cavity 64, and a contact switch 63 located on the right side of the trigger slide block 61 is fixedly connected to the upper end wall of the trigger slide block cavity 64.

In addition, in an embodiment, a motor 27 located on the upper side of the switching gear cavity 25 is arranged in the main box body 10, a lower end wall of the motor 27 is fixedly connected with a driving shaft 26 extending downward into the switching gear cavity 25, a switching sleeve 28 is connected to the driving shaft 26 in a spline fit manner, a switching gear 24 located in the switching gear cavity 25 is fixedly connected to the switching sleeve 28, a switching disc 21 is connected to a lower end surface of the switching sleeve 28 in a rotating fit manner, a switching spring 20 is fixedly connected between the lower end surface of the switching disc 21 and the lower end wall of the switching gear cavity 25, and a lower end wall of the switching gear cavity 25 is fixedly connected with an electromagnet 19 extending downward into the main box body 10.

In addition, in one embodiment, a lifting gear 30 located in the lifting gear cavity 29 is fixedly connected to the lifting screw 34, the lifting gear 30 is engaged with the switching gear 24, a rotating intermediate shaft 18 extending upward into the rotating gear cavity 22 and downward into the rotating bevel gear cavity 16 is rotatably and fittingly connected to the upper end wall of the rotating gear cavity 22, a rotating gear 23 located in the rotating gear cavity 22 is fixedly connected to the rotating intermediate shaft 18, a main rotating bevel gear 17 located in the rotating bevel gear cavity 16 is further fixedly connected to the rotating intermediate shaft 18, and the main rotating bevel gear 17 is engaged with the secondary rotating bevel gear 15.

The fixing and connecting method in this embodiment includes, but is not limited to, bolting, welding, and the like.

As shown in fig. 1-4, when the apparatus of the present invention is in the initial state, the switching gear 24 and the lifting gear 30 are in the engaged state, the measuring box 36 is located at the leftmost end of the stroke, the marker 56 is located at the left side of the marker cavity 57, the push block 58 is located at the left side of the push block cavity 59, the middle slider 66 is located at the right side of the middle slider cavity 65, the middle spring 67 and the push block spring 60 are in the relaxed state, the middle pull rope 68 is in the tightened state, the trigger slider 61 is located at the left side of the trigger slider cavity 64 and is not in contact with the contact switch 63, the trigger spring 62 is in the relaxed state, and the induction spring 40 is in the;

sequence of mechanical actions of the whole device:

when the three-jaw chuck 13 is started to work, a workpiece to be detected is fixed through the three-jaw chuck 13, the axis of the workpiece is determined, the starting motor 27 drives the driving shaft 26 to rotate, the driving shaft 26 rotates to drive the switching sleeve 28 to rotate, the switching sleeve 28 rotates to drive the lifting screw 34 to rotate through the switching gear 24 and the lifting gear 30, the lifting screw 34 rotates to drive the lifting nut 33 to move downwards, the lifting nut 33 moves downwards, the measuring box 36 is driven to move downwards through the guide plate 35, the measuring box 36 moves downwards to drive the induction rod 32 to move downwards, the induction rod 32 contacts with the outer end face of the workpiece to be detected in the downward moving process, the induction rod 32 overcomes the thrust action of the induction spring 40 to move upwards under the thrust action of the outer end face of the workpiece to be detected, the induction rod 32 moves upwards to drive the marking pen 56 to move upwards, when the middle slider cavity 65 in the induction rod 32 moves upwards to the right side of the trigger slider cavity 64, the middle slider 66 overcomes the tensile action of the The rope 68 and the push block 58 move rightwards under the tension of the intermediate pull rope 68 against the tension of the push block spring 60 and drive the marking pen 56 to move rightwards, and the marking pen 56 moves rightwards to enable the pen point to abut against the scale paper 53, and the abutting position is just on the zero scale mark of the scale paper 53.

When the middle slide block 66 moves leftwards, the trigger slide block 61 overcomes the pulling force of the trigger spring 62 to move rightwards under the action of the magnetic attraction of the middle slide block 66 to touch the contact switch 63, the contact switch 63 controls the electromagnet 19 to be electrified, the switching disc 21 overcomes the pushing force of the switching spring 20 to move downwards under the action of the magnetic attraction of the electromagnet 19, the switching disc 21 moves downwards to drive the switching gear 24 to move downwards so as to enable the switching gear 24 and the lifting gear 30 to be disengaged, the measuring box 36 stops moving downwards, the pen point 56 is just on the zero graduation line of the graduated paper 53, the switching gear 24 and the lifting gear 30 are abutted against the rotating gear 23 after being disengaged, the switching sleeve 28 rotates to drive the rotating middle shaft 18 to rotate through the switching gear 24 and the rotating gear 23, the rotating middle shaft 18 rotates to drive the three-jaw chuck shaft 14 to rotate through the main rotating bevel gear 17 and the auxiliary rotating, the three-jaw chuck shaft 14 rotates to drive the workpiece to be measured to rotate through the three-jaw chuck 13, and during the rotation process of the workpiece to be measured, the roundness change drives the induction rod 32 to move up and down, so that the induction rod is recorded on the scale paper 53 through the marking pen 56.

The roundness measurement of the section is completed after the measured workpiece rotates for one circle, the motor 27 stops working, the measuring box 36 is manually pushed to move rightwards to the next measuring point, the recording intermediate shaft 50 rotates under the action of the rack gear 51 and the rack 38 in the process that the measuring box 36 moves rightwards, the recording intermediate shaft 50 rotates to drive the driving paper tube shaft 46 to rotate through the driving bevel gear 49 and the driven bevel gear 47, the driving paper tube shaft 46 rotates to drive the driving paper tube 45 to rotate, the driving paper tube shaft 46 rotates and simultaneously drives the driven paper tube shaft 55 to rotate through the driving belt wheel 44, the conveying belt 42 and the driven belt wheel 41, the driven paper tube shaft 55 rotates to drive the driven paper tube 54 to rotate, the driving paper tube 45 and the driven paper tube 54 rotate to drive the scale paper 53 to move, the scale paper 53 at the right side part of the marking pen 56 is updated, the roundness measurement at the next time is prepared, the scale paper 53 moves to simultaneously move the part marked with the recording result to the right side of the driving, the maximum indication value and the minimum indication value on the scale paper 53 can be read through the scale paper cavity 69, half of the difference between the two indication values is the roundness error of the excircle of the measured workpiece, and the motor 27 is restarted to enable the three-jaw chuck 13 to rotate for one circle when the next roundness measurement is carried out.

After the measurement is finished, the workpiece to be measured is taken down, the induction rod 32 moves downwards under the thrust action of the induction spring 40 to reset, the trigger slide block 61 loses the magnetic attraction force of the middle slide block 66 to act on the left movement reset under the tension action of the trigger spring 62 and separate from the contact switch 63, the electromagnet 19 is powered off, the switching disc 21 moves upwards under the thrust action of the switching spring 20 to reset, the switching gear 24 and the lifting gear 30 are meshed again, the middle slide block 66 loses the magnetic attraction force of the trigger slide block 61 to act on the right movement reset under the tension action of the middle spring 67, the middle pull rope 68 is loosened, the push block 58 loses the tension force of the middle pull rope 68 to act on the left movement reset under the tension action of the push block spring 60, and then the motor 27.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a work piece roundness measuring device convenient to reading, includes the main tank body, its characterized in that: a right-opening measuring cavity is arranged in the main box body, a right-opening measuring box cavity is communicated with and arranged on the upper end wall of the measuring cavity, a three-jaw chuck cavity is communicated with and arranged on the left end wall of the measuring cavity, a rotating bevel gear cavity is arranged on the left side of the three-jaw chuck cavity, a rotating gear cavity is arranged on the upper side of the rotating bevel gear cavity, a switching gear cavity is communicated with and arranged on the right end wall of the rotating gear cavity, a lifting gear cavity is communicated with and arranged on the right end wall of the switching gear cavity, a three-jaw chuck shaft which extends rightwards into the three-jaw chuck cavity and leftwards into the rotating bevel gear cavity is connected with the left end wall of the three-jaw chuck shaft in a rotating matching manner, a three-jaw chuck positioned in the three-jaw chuck cavity is fixedly connected with the right end surface of the three-jaw chuck shaft, and a lifting lead screw which extends upwards into the lifting gear, the lifting screw is connected with a lifting nut in a threaded fit manner, the right end face of the lifting nut is fixedly connected with a guide plate, a rack is arranged in the guide plate, a measuring box is connected in a sliding fit manner in a measuring box cavity, a guide plate cavity which is communicated with the left and right is arranged in the measuring box, the guide plate cavity is connected with the guide plate in a sliding fit manner, a sensing rod cavity with a downward opening is arranged in the measuring box, the right end wall of the sensing rod cavity is communicated with a graduated paper cavity with a rightward opening, a sensing rod which extends downwards into the measuring cavity is connected in the sensing rod cavity in a sliding fit manner, a sensing spring is fixedly connected between the upper end face of the sensing rod and the upper end wall of the sensing rod cavity, a recording bevel gear cavity is arranged at the upper side of the graduated paper cavity, a rack gear cavity is arranged at the front side of the recording bevel gear cavity, and, the utility model discloses a take turns the intracavity, the recording bevel gear intracavity is equipped with the recording bevel gear, the recording bevel gear intracavity is equipped with the belt wheel chamber, the recording bevel gear intracavity front end wall normal running fit is connected and extends to backward the recording intermediate shaft in the recording bevel gear intracavity and extends to forward the rack gear in the rack gear intracavity, fixedly connected with is located on the recording intermediate shaft the rack gear of rack gear intracavity, it is located to go back fixedly connected with on the recording intermediate shaft the main recording bevel gear of recording bevel gear intracavity, the recording bevel gear intracavity lower end wall normal running fit is connected with and upwards extends to the recording bevel gear intracavity and downwards run through the scale paper chamber and downwards extend to the initiative fiber container axle of belt wheel intracavity, the epaxial fixedly connected with of initiative fiber container is located the initiative fiber container of scale paper intracavity.

2. The workpiece roundness measuring apparatus facilitating reading as set forth in claim 1, wherein: the automatic paper feeding device is characterized in that a driven recording bevel gear is fixedly connected to the driving paper tube shaft and located in the belt wheel cavity, the driven recording bevel gear is meshed with the driving recording bevel gear, the driving paper tube shaft is fixedly connected with a driving belt wheel located in the belt wheel cavity, the upper end wall of the belt wheel cavity is connected with a driven paper tube shaft which extends downwards into the belt wheel cavity and upwards penetrates through the scale paper cavity in a matched mode, the driven paper tube shaft is fixedly connected with a driven paper tube located in the scale paper cavity, scale paper is fixedly connected between the driven paper tube and the driving paper tube, a driven belt wheel located in the belt wheel cavity is fixedly connected to the driven paper tube shaft, and a conveying belt is connected between the driven belt wheel and the driving belt wheel in a matched mode.

3. The workpiece roundness measuring apparatus facilitating reading as set forth in claim 1, wherein: a marker pen cavity with a right opening is arranged in the induction rod, a push block cavity is communicated with the upper end wall of the marker pen cavity, a marker pen extending to the right in the scale paper cavity is connected with the marker pen in a sliding fit manner in the marker pen cavity, a push block connected with the push block cavity in a sliding fit manner is fixedly connected with the upper end surface of the marker pen, a push block spring is fixedly connected between the left end surface of the push block and the left end wall of the push block cavity, a middle slide block cavity with a left opening and positioned at the upper side of the push block cavity is arranged in the induction rod, a middle slide block is connected in the middle slide block cavity in a sliding fit manner, a middle spring is fixedly connected between the right end surface of the middle slide block and the right end wall of the middle slide block cavity, a middle pull rope is also fixedly connected with the right end surface of the middle pull rope, the other end of the middle pull rope is fixedly connected with the right, the trigger device is characterized in that a trigger slider is connected in the trigger slider cavity in a sliding fit manner, a trigger spring is fixedly connected between the left end face of the trigger slider and the left end wall of the trigger slider cavity, and a contact switch located on the right side of the trigger slider is fixedly connected to the upper end wall of the trigger slider cavity.

4. The workpiece roundness measuring apparatus facilitating reading as set forth in claim 1, wherein: be equipped with in the headstock and be located the motor of switching gear chamber upside, end wall fixed connection downwardly extending under the motor the driving shaft in the switching gear intracavity, spline fit is connected with the switching sleeve on the driving shaft, fixedly connected with is located on the switching sleeve the switching gear in the switching gear intracavity, terminal surface normal running fit is connected with the switching dish under the switching sleeve, under the switching dish terminal surface with fixedly connected with switching spring between the end wall under the switching gear chamber, switching gear chamber end wall fixed connection downwardly extending to electro-magnet in the headstock.

5. The workpiece roundness measuring apparatus facilitating reading as set forth in claim 1, wherein: the lifting screw is fixedly connected with a lifting gear located in the lifting gear cavity, the lifting gear is meshed with the switching gear, the upper end wall of the rotating gear cavity is connected with a rotating intermediate shaft which extends upwards into the rotating gear cavity and downwards extends into the rotating bevel gear cavity in a rotating matching mode, the rotating intermediate shaft is fixedly connected with a rotating gear located in the rotating gear cavity, the rotating intermediate shaft is fixedly connected with a main rotating bevel gear located in the rotating bevel gear cavity, and the main rotating bevel gear is meshed with the driven rotating bevel gear.