CN211668409U

CN211668409U - Holder inner diameter measurement gauge

Info

Publication number: CN211668409U
Application number: CN202020283849.5U
Authority: CN
Inventors: 敦攀; 刘冰冰; 袁建平
Original assignee: Zhejiang Manulife Automobile Parts Co ltd
Current assignee: Zhejiang Manulife Automobile Parts Co ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-10-13
Anticipated expiration: 2030-03-10

Abstract

The utility model relates to an utensil is examined in measurement of holder internal diameter, comprises a workbench, the solid fixed ring of holder and amesdial, the workstation is equipped with solid fixed ring connecting seat, be equipped with the spindle nose on solid fixed ring's the outer peripheral face, the axis of spindle nose intersects perpendicularly with the solid fixed ring's of holder axis, the spindle nose rotates to be connected on solid fixed ring connecting seat, can be connected with the top deciliter mechanism of two tops and two tops deciliter of drive on the workstation deciliter, the straight line that two tops confirmed, the axis of spindle nose and the solid fixed ring's of holder axis three intersect in a bit, the amesdial is used for detecting the holder along with the displacement of a top in two tops of the solid fixed ring pivoted. The utility model has the advantages of once load can measure the internal diameter of the different angles of holder and become the dispersion between, solved and measured the problem that the big inefficiency of error that the change of holder internal diameter exists through the megger.

Description

Holder inner diameter measurement gauge

Technical Field

The utility model relates to a bearing processing technology field especially relates to a holder internal diameter measurement examines utensil.

Background

The cage is a component on the bearing. The retainer is annular, and the inner peripheral surface of the retainer is required to be spherical, but the inner peripheral surface of the retainer actually machined cannot be on the same spherical surface but on concentric spherical surfaces of different radii, so long as the radius variation range of the spherical surfaces of different radii on which the inner peripheral surface is located is within a predetermined range. In a conventional method for measuring the variation of the inner diameter of the cage (hereinafter, the variation of the inner diameter of the cage is referred to as cage inner diameter measurement), the inner diameters of different places are measured by a megger, and then whether the radius difference at each place is within the track range or not is calculated. The megger is inconvenient to use when measuring the inner diameter of the retainer, and reloading is needed when the radius of one angle of the retainer is detected, so that the error caused by loading is considered to be large during detection, and the detection efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a once load and can measure the holder internal diameter measurement of the internal diameter of the different angles of holder difference between becoming examines utensil, solved and measured the problem of the big inefficiency of error that the change of holder internal diameter exists through the megger.

The technical problem is solved by the following technical scheme: the inner diameter measuring gauge for the retainer comprises a workbench, a retainer fixing ring and a dial indicator, wherein a fixing ring connecting seat is arranged on the upper surface of the workbench, a shaft head is arranged on the outer peripheral surface of the fixing ring, the axis of the shaft head is vertically intersected with the axis of the retainer fixing ring, the shaft head is rotatably connected onto the fixing ring connecting seat, two ejecting heads used for abutting against the inner peripheral surface of the retainer positioned in the retainer fixing ring and an ejecting head separating and combining mechanism for driving the two ejecting heads to separate and combine are detachably connected onto the workbench, the straight line determined by the two ejecting heads, the axis of the shaft head and the axis of the retainer fixing ring intersect at one point, and the dial indicator is used for detecting the displacement of one of the two ejecting heads in the rotating process of the retainer fixing ring. When the device is used, the retainer is fixed on the workbench through the retainer fixing ring, the spherical center of the inner peripheral surface of the retainer is positioned at the intersection of the axis of the shaft head and the axis of the retainer fixing ring, two ejector heads are fixed on the inner peripheral surface of the retainer under the action of the ejector head split-combination mechanism, the distance between the two ejector heads is the inner diameter of the joint of the retainer and the ejector heads, then the shaft heads are rotated to enable the retainer fixing ring to rotate to realize the detection angle of the retainer, the detection angle of the retainer is changed through rotation, so that the detection heads of the dial indicator are kept in abutting connection (directly or indirectly abutting connection) on one ejector head along the distribution direction of the two ejector heads, the reading jumping range of the dial indicator is read, and the change range is the inner diameter (radius) difference of the retainer at different angles. And judging whether the inner diameter of the retainer meets the requirement according to whether the variation range of the difference is in the required range. The utility model discloses once load the holder and then can accomplish the measurement of holder at the internal diameter of different angles (multi-angle) and directly learn the internal diameter variation volume (be the dispersion of internal diameter) after targetting in place, consequently detect convenient quick, device error and measuring error, the accuracy that lead to when can not producing the angle are good.

Preferably, the number of the fixing ring connecting seats is two, the number of the shaft heads is two, the shaft heads are connected to the two fixing ring connecting seats in a one-to-one correspondence mode, and the retainer fixing rings are located between the 2 fixing ring connecting seats. The stability and the reliability are good when in connection. The accuracy of the detection result can be improved.

Preferably, one of the spindle heads is connected with a retainer fixing ring rotating handle for driving the spindle head to rotate. When the angle-adjustable retainer is used, the angle of the retainer is changed by rotating the shaft head through the retainer fixing ring and the rotating handle. The convenience in use is improved.

Preferably, a positioning support block is arranged in the retainer fixing ring, the retainer is arranged in the retainer fixing ring in a penetrating manner and is placed on the positioning support block, and the spherical center of the spherical surface where the inner circumferential surface of the retainer is located on the intersection point of the axis of the shaft head and the axis of the retainer fixing ring. The convenience in loading the holder can be improved.

Preferably, the retainer top fixing ring is further provided with a threaded through hole, and the threaded through hole is internally threaded with a retainer top fixing rod for fixing the retainer in the retainer fixing ring. The retainer can be prevented from moving relative to the retainer fixing ring in the rotating process, and the accuracy and the reliability in detection are improved.

Preferably, a slider stop block is arranged on the lower surface of the workbench, 2 sliding grooves extending in the distribution direction of the jacks are formed in the workbench, two slider connecting plates are arranged between the slider stop block and the workbench, sliders which are connected in the sliding grooves in a sliding mode and extend into the retainer fixing rings are connected onto the slider connecting plates, 2 jacks are connected onto the sliders on the 2 slider connecting plates in a one-to-one correspondence mode, and the jack splitting and combining mechanism comprises a separating spring for separating the 2 slider connecting plates and a folding mechanism for driving the two slider connecting plates to fold. A specific technical scheme for connecting the ejector head with the workbench is provided. This technical scheme will realize the part setting that top and workstation are connected at the lower surface of workstation, can realize the overall arrangement under the less condition of workstation, and the overall arrangement is more convenient and compact.

Preferably, the folding mechanism comprises a rod body extending along the distribution direction of 2 of the ejector heads, a first sliding cavity, a rod body part avoiding through hole and a second sliding cavity are sequentially arranged in the rod body along the rod body extending direction, the rod body is also internally provided with a first communicating cavity and a second communicating cavity, the first sliding cavity, the rod body part avoiding through hole and the second sliding cavity are positioned between the first communicating cavity and the second communicating cavity, the first sliding cavity is internally connected with a first piston in a sliding and sealing manner, the first sliding cavity is divided into a first sliding cavity part first oil cavity and a first sliding cavity part second oil cavity by the first piston, the first piston is connected with a first ejector rod extending into the rod body part avoiding through hole through the first sliding cavity part first oil cavity, the first sliding cavity part first oil cavity is provided with a first sliding cavity part first connecting hole communicated with the first communicating cavity, and the first sliding cavity part second oil cavity is provided with a first sliding second communicating hole communicated with the second communicating cavity, the second sliding cavity is internally connected with a second piston in a sliding and sealing manner, the second piston divides the second sliding cavity into a second sliding cavity part first oil cavity and a second sliding cavity part second oil cavity, the second piston is connected with a second mandril which extends into the rod body part avoiding through hole through the second sliding cavity part first oil cavity, the second sliding cavity part first oil cavity is provided with a second sliding cavity part first connecting hole communicated with the second communicating cavity, the second sliding cavity part second oil cavity is provided with a second sliding cavity part second connecting hole communicated with the first communicating cavity, the second piston is connected with a driving rod which extends out through the second sliding cavity part second oil cavity, the driving rod is provided with a rack section, a gear is meshed on the rack section, the gear is connected with a rotating shaft, the rotating shaft is connected with a gear rotating handle driving the rotating shaft to rotate, and the rotating shaft is rotatably connected on a gear connecting seat, the gear connecting seat is connected on the workbench, the sliding block connecting plate is connected with a driving plate which is positioned between the first ejector rod and the second ejector rod and positioned in the rod body avoiding through hole, and the driving plate can be slidably sleeved on the hole wall of the rod body avoiding through hole and hangs the rod body on the lower surface of the workbench. Provides a specific technical scheme of a folding mechanism. No exposed pipeline joint exists between the cavities of the folding mechanism, and the phenomenon of dripping is not easy to generate. The driving part between the folding mechanism and the sliding block connecting plate simultaneously connects the folding mechanism to the workbench, so that the structure is compact.

Preferably, the cross-sectional area of the first piston is equal to the cross-sectional area of the second piston, the slide block stop block is provided with a positioning pin, the rod body is provided with a positioning sleeve sleeved on the positioning pin, 2 driving plates on the slide block connecting plate are symmetrically distributed on two radial sides of the positioning sleeve, and the driving end of the first ejector rod and the driving end of the second ejector rod are symmetrically distributed on two radial sides of the positioning sleeve. The accuracy of the detection result can be improved.

As preferred, be equipped with the workstation portion on the workstation and dodge the through-hole, the amesdial includes the dial plate, sets up gauge outfit on the dial plate and telescopically wears to establish the detection head in the gauge outfit, be equipped with the amesdial connecting seat on the upper surface of workstation, the gauge outfit wears to establish in the connector connecting seat, amesdial connecting seat threaded connection has the tight amesdial fixing bolt on the amesdial connecting seat in gauge outfit top, the extending direction of gauge outfit is with 2 the deciliter direction of top is the same, one be connected with on the slider connecting plate with detect the kicking block that the head aligns, the kicking block is worn to establish the workstation portion dodges in the through-hole and stretches out the upper surface of workstation. The convenience of the dial indicator in reading is guaranteed, and the dial indicator can be prevented from interfering the rotation of the retainer.

Preferably, two ends of the separation spring are in one-to-one correspondence with the 2 sliding block connecting plates, abut against the two sliding block connecting plates and penetrate through the sliding block connecting plates. The connection is convenient and the reliability is good.

Preferably, an end surface of one end of the plug abutting against the holder is a spherical surface. The detection accuracy can be improved.

The utility model has the advantages of that: the inner diameter difference of the retainer at different angles can be directly measured by carrying out one-time loading; the detection is convenient, the efficiency is high, and errors caused by secondary loading of the retainer during detection at different angles can not be generated.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic bottom view of the present invention.

Fig. 4 is a partially enlarged schematic view of a portion a of fig. 3.

In the figure: the device comprises a workbench 1, a retainer fixing ring 2, a dial indicator 3, a supporting leg 4, a fixing ring connecting seat 5, a chute 6, a spindle head 7, a retainer fixing ring rotating handle 8, a positioning supporting block 9, a retainer fixing ejector rod 10, an ejector head 11, an end surface 12 of one end of the ejector head abutted against the retainer, a slider 13, a slider connecting plate 14, a workbench part avoiding through hole 15, an ejector block 16, a connecting lug 17, a dial 18, a gauge head 19, a detection head 20, a dial indicator connecting seat 21, a dial indicator fixing bolt 22, a slider stopper 23, a separation spring 24, a rod body 25, a rod body part avoiding through hole 26, a first communicating cavity 27, a second communicating cavity 28, a first piston 29, a first sliding cavity part first oil cavity 30, a first sliding cavity part second oil cavity 31, a first ejector rod 32, a first sliding cavity part first through hole 33, a first sliding cavity part second communicating hole 34, a second piston 35, a second sliding cavity part first oil cavity part 36, a first sliding cavity part, A second sliding cavity part second oil cavity 37, a second mandril 38, a second sliding cavity part first communicating hole 39, a second sliding cavity part second communicating hole 40, a driving rod 41, a rack segment 42, a gear 43, a rotating shaft 44, a gear rotating handle 45, a gear connecting seat 46, a positioning pin 47, a positioning sleeve 48, a driving plate 49, a driving end 50 of the first mandril, a driving end 51 of the second mandril and a hole wall 52.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1, 2, 3 and 4, the holder inner diameter measuring gauge comprises a workbench 1, a holder fixing ring 2 and a dial indicator 3. The working table is provided with supporting legs 4. The upper surface of workstation is equipped with 2 solid fixed ring connecting seats 5. The worktable is provided with a chute 6 extending in the front-rear direction. The chute runs through the upper and lower surfaces of the workbench. The peripheral surface of the fixing ring is provided with 2 shaft heads 7. The 2 spindle heads are coaxial. 2 spindle nose one-to-one first rotates and connects on 2 solid fixed ring connecting seats. One shaft head is connected with a retainer fixing ring rotating handle 8 for driving the shaft head to rotate. The retainer fixing ring is positioned between the 2 fixing ring connecting seats. The axis of the shaft head is vertically intersected with the axis of the retainer ring. The retainer fixing ring is internally provided with 2 positioning supporting blocks 9. The 2 positioning supporting blocks are distributed on two sides of the sliding groove in the width direction. When the retainer is arranged in the retainer fixing ring in a penetrating manner and is placed on the positioning supporting block, the spherical center of the spherical surface where the inner peripheral surface of the retainer is located is positioned on the intersection point of the axis of the shaft head and the axis of the retainer fixing ring. The retainer top fixing ring is also provided with a threaded through hole. The thread through hole is internally threaded with a retainer fixing ejector rod 10 for fixing the retainer in the retainer fixing ring. The table is connected with two plungers 11 for abutting against the inner peripheral surface of the holder located in the holder fixing ring and a plunger engaging and disengaging mechanism for driving the two plungers to engage and disengage. The straight line determined by the two jacks, the axis of the shaft head and the axis of the retainer fixing ring are intersected at one point. The end surface 12 of one end of the plug, which is abutted against the retainer, is a spherical surface. The two jacks are distributed along the front-back direction. The plug extends in the front-rear direction. The two heads are connected to the 2 sliders 13 in a one-to-one correspondence. The sliding block is connected in the sliding groove in a sliding mode. The upper end of the sliding block extends into the retainer fixing ring. The top is connected to the side of the slide block away from each other. The 2 sliders are connected to the 2 slider connecting plates 14 in a one-to-one correspondence. 2 the slide block connecting plates are distributed along the front and back directions. The slider connecting plate is located on the lower surface, namely the back surface, of the workbench. The worktable is provided with a worktable part avoiding through hole 15. The table portion avoidance through hole is provided with a top block 16. The lower end of the top block is connected with the connecting lug 17. The engaging lug is positioned on the lower surface of the workbench. The upper end of the top block extends out of the upper surface of the workbench. The dial gauge comprises a dial plate 18, a gauge head 19 arranged on the dial plate and a detection head 20 telescopically arranged in the gauge head. The extending and retracting direction of the detection head (i.e., the extending direction of the gauge head) is the front-rear direction. And the detection head is aligned with the top block to realize detection. The upper surface of the working table is provided with a dial indicator connecting seat 21. The gauge outfit is arranged in the connector connecting seat in a penetrating way. The dial gauge connecting seat is in threaded connection with a dial gauge fixing bolt 22 for tightly pushing the gauge head against the dial gauge connecting seat. The connecting lug is connected to a slider connecting plate. A slider stop 23 is connected to the lower surface of the table. The two slide block connecting plates are positioned between the slide block stop dog and the workbench. The top head opening and closing mechanism comprises a separation spring 24 for separating the 2 sliding block connecting plates and a closing mechanism for driving the two sliding block connecting plates to close. The separation spring is positioned between the two slide block connecting plates. Two ends of the separation spring penetrate through blind holes in the two sliding block connecting plates in a one-to-one correspondence mode and are abutted to the sliding block connecting plates. The closing mechanism comprises a rod 25 extending in the front-rear direction. A first sliding cavity, a rod body part avoiding through hole 26 and a second sliding cavity are sequentially arranged in the rod body along the extension direction of the rod body. A first communicating chamber 27 and a second communicating chamber 28 are also provided in the body. The first communicating cavity and the second communicating cavity are distributed along the left-right direction. The first sliding cavity, the rod body avoiding through hole and the second sliding cavity are located between the first communicating cavity and the second communicating cavity. A first piston 29 is sealingly and slidably connected in the first sliding chamber. The first piston divides the first slide chamber into a first slide chamber portion first oil chamber 30 and a first slide chamber portion second oil chamber 31. The first piston is connected with a first mandril 32 which extends into the avoidance through hole of the rod body part through a first oil cavity of the first sliding cavity part. The first sliding chamber part first oil chamber is provided with a first sliding chamber part first communication hole 33 communicated with the first communication chamber. The first slide chamber portion second oil chamber is provided with a first slide chamber portion second communication hole 34 communicating with the second communication chamber. A second piston 35 is connected in a sliding and sealing manner in the second sliding cavity. The second piston divides the second slide chamber into a second slide chamber portion first oil chamber 36 and a second slide chamber portion second oil chamber 37. The second piston is connected with a second ejector rod 38 which extends into the rod body part avoiding through hole through the first oil cavity of the second sliding cavity part. The second sliding chamber part first oil chamber is provided with a second sliding chamber part first communicating hole 39 communicating with the second communicating chamber. The second sliding chamber section second oil chamber is provided with a second sliding chamber section second communication hole 40 communicating with the first communication chamber. The second piston is connected to a drive rod 41 that extends through a second oil chamber of the second slide chamber portion. The first piston and the second piston are equal in cross section. The drive rod is provided with a rack segment 42. The rack segment is engaged with a gear 43. The gear is connected with a rotating shaft 44. The rotating shaft is connected with a gear rotating handle 45 which drives the rotating shaft to rotate. The rotating shaft is rotatably connected to the gear coupling base 46. The gear connecting base is connected on the lower surface of the workbench. The slide block stop is provided with a positioning pin 47. The rod body is provided with a positioning sleeve 48 which is sleeved on the positioning pin. The slider connecting plate is connected with a drive plate 49 positioned in the rod body part avoiding through hole. The drive plate is located between first ejector pin and second ejector pin. The driving plates on the 2 sliding block connecting plates are symmetrically distributed on two radial sides of the positioning sleeve. The driving end 50 of the first ejector rod and the driving end 51 of the second ejector rod are symmetrically distributed on two radial sides of the positioning sleeve. The driving plate can be slidably sleeved on the two hole walls 52 of the rod body avoiding through hole to hang the rod body on the lower surface of the workbench.

When the retainer is used, the retainer is arranged in the retainer fixing ring in a penetrating mode, one end of the retainer is supported on the positioning and supporting block, and the retainer fixing ring are fixed together through the retainer fixing ejector rod. In the process of placing the retainer, the two sliding blocks are driven to fold by the folding mechanism, so that the two ejection heads are prevented from interfering the installation of the retainer. After the retainer is installed in the retainer fixing ring, the folding mechanism loosens the folding action on the two pushing heads, and the two pushing heads are tightly pushed against the inner circumferential surface of the retainer under the action of the separating spring. The dial gauge is adjusted until the detection head is just abutted against the ejector block (namely, the reading of the dial gauge is zero), the retainer fixing ring is rotated by rotating the handle through the retainer fixing ring so as to adjust the detection angle of the retainer, the reading change of the dial gauge is observed in the rotating process, the change of the reading of the dial gauge is the inner diameter difference of different angles of the retainer, and the change of the reading of the dial gauge is also the displacement of one ejector head in the ejector head.

Claims

1. A holder inner diameter measuring gauge is characterized by comprising a workbench, a holder fixing ring and a dial indicator, the upper surface of the workbench is provided with a fixed ring connecting seat, the peripheral surface of the fixed ring is provided with a shaft head, the axis of the shaft head is vertically intersected with the axis of the retainer fixing ring, the shaft head is rotationally connected to the fixing ring connecting seat, the workbench is connected with two jacks which are used for abutting against the inner peripheral surface of the retainer positioned in the retainer fixing ring and a jack on-off mechanism for driving the two jacks to be on-off, the straight line determined by the two jacks, the axis of the shaft head and the axis of the retainer ring intersect at one point, the dial indicator is used for detecting the displacement of one of the two ejecting heads in the process that the retainer rotates along with the retainer fixing ring.

2. The holder inner diameter measuring gauge according to claim 1, wherein the number of the fixing ring connecting seats is two, the number of the shaft heads is two, the two shaft heads are rotatably connected to the two fixing ring connecting seats in a one-to-one correspondence manner, and the holder fixing ring is located between 2 fixing ring connecting seats.

3. The holder inner diameter measurement gauge according to claim 2, wherein one of the spindle heads is connected with a holder fixing ring rotating handle for driving the spindle head to rotate.

4. The holder inner diameter measuring gauge according to claim 1, 2 or 3, wherein a positioning support block is arranged in the holder fixing ring, and when the holder is arranged in the holder fixing ring in a penetrating manner and placed on the positioning support block, the spherical center of the spherical surface where the inner circumferential surface of the holder is located at the intersection point of the axis of the shaft head and the axis of the holder fixing ring.

5. The holder inner diameter measurement gauge according to claim 1, 2 or 3, wherein a slider stop is arranged on the lower surface of the workbench, a chute extending in the direction of the distribution of the 2 plungers is arranged on the workbench, two slider connecting plates are arranged between the slider stop and the workbench, sliders which are slidably connected in the chute and extend into the holder fixing ring are connected to the slider connecting plates, the 2 plungers are connected to the sliders on the two slider connecting plates in a one-to-one correspondence manner, and the plunger opening and closing mechanism comprises a separation spring for separating the two slider connecting plates and a closing mechanism for driving the two slider connecting plates to close.

6. The holder inner diameter measurement gauge according to claim 5, wherein the folding mechanism comprises a rod body extending in the direction of 2 of the tips, the rod body is provided with a first sliding chamber, a rod body portion avoiding through hole and a second sliding chamber in sequence along the direction of extension of the rod body, the rod body is further provided with a first communicating chamber and a second communicating chamber, the first sliding chamber, the rod body portion avoiding through hole and the second sliding chamber are located between the first communicating chamber and the second communicating chamber, the first sliding chamber is internally connected with a first piston in a sliding and sealing manner, the first sliding chamber is divided into a first sliding chamber portion first oil chamber and a first sliding chamber portion second oil chamber by the first piston, the first piston is connected with a first tip extending into the rod body portion avoiding through hole through the first sliding chamber portion first oil chamber, the first sliding chamber portion first oil chamber is provided with a first sliding chamber portion first through hole communicating the first communicating chamber, the first sliding cavity part and the second oil cavity are provided with a first sliding cavity part and a second communicating hole which are communicated with a second communicating cavity, the second sliding cavity is internally connected with a second piston in a sliding and sealing manner, the second sliding cavity is divided into a second sliding cavity part and a first oil cavity and a second sliding cavity part and a second oil cavity by the second piston, the second piston is connected with a second ejector rod which extends into the rod body part avoiding through hole through the second sliding cavity part and the first oil cavity, the second sliding cavity part and the first oil cavity are provided with a second sliding cavity part and a first communicating hole which are communicated with the second communicating cavity, the second sliding cavity part and the second oil cavity are provided with a second sliding cavity part and a second communicating hole which are communicated with the first communicating cavity, the second piston is connected with a driving rod which extends out through the second sliding cavity part and the second oil cavity, the driving rod is provided with a rack section, the rack section is engaged with a gear, the gear is connected with a rotating shaft, and the rotating shaft is connected with a gear rotating, the rotating shaft is rotatably connected to the gear connecting seat, the gear connecting seat is connected to the workbench, the sliding block connecting plate is connected with a driving plate which is located between the first ejector rod and the second ejector rod and located in the rod body portion avoiding through hole, and the driving plate is slidably sleeved on the hole wall of the rod body portion avoiding through hole and hangs the rod body on the lower surface of the workbench.

7. The holder inner diameter measurement gauge according to claim 6, wherein the cross-sectional area of the first piston is equal to the cross-sectional area of the second piston, the slider block is provided with a positioning pin, the rod body is provided with a positioning sleeve sleeved on the positioning pin, the driving plates on the 2 slider connecting plates are symmetrically distributed on two radial sides of the positioning sleeve, and the driving ends of the first ejector rod and the second ejector rod are symmetrically distributed on two radial sides of the positioning sleeve.

8. The holder inner diameter measurement inspection tool according to claim 5, characterized in that a worktable portion avoiding through hole is formed in the worktable, the dial indicator comprises a dial plate, a gauge head arranged on the dial plate and a detection head telescopically penetrating into the gauge head, a dial indicator connecting seat is arranged on the upper surface of the worktable, the gauge head penetrates into the connecting seat, the dial indicator connecting seat is in threaded connection with a dial indicator fixing bolt for tightly pushing the gauge head against the dial indicator connecting seat, the extending direction of the gauge head is the same as the dividing and combining directions of 2 gauge heads, one sliding block connecting plate is connected with a top block aligned with the detection head, and the top block penetrates into the worktable portion avoiding through hole and extends out of the upper surface of the worktable.

9. The holder inner diameter measuring gauge according to claim 5, wherein two ends of the separation spring are abutted against 2 slider connecting plates in a one-to-one correspondence manner and are arranged in the slider connecting plates in a penetrating manner.

10. The holder inner diameter measuring tool according to claim 1, 2 or 3, wherein an end surface of one end of the plug abutting against the holder is a spherical surface.