CN216781075U

CN216781075U - Replaceable inner hole automatic tensioning centering mechanism

Info

Publication number: CN216781075U
Application number: CN202123255141.2U
Authority: CN
Inventors: 范志新
Original assignee: Wuxi Vgage Measuring Equipment Co ltd
Current assignee: Wuxi Wannaite Automation Equipment Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-06-21
Anticipated expiration: 2031-12-22

Abstract

The utility model relates to the technical field of automatic tensioning and centering mechanisms, in particular to a replaceable inner hole automatic tensioning and centering mechanism. The positioning device comprises a positioning shaft, wherein a shaft hole which is through up and down is arranged in the positioning shaft, and a movable shaft which can slide up and down is arranged in the shaft hole; the upper part of the positioning shaft is provided with a tensioning platform with a cone frustum structure, the outer surface of the movable shaft is provided with an expansion sleeve mounting platform, the expansion sleeve mounting platform is positioned above the positioning shaft, the movable shaft is sleeved with an expansion sleeve, the upper part of the expansion sleeve is locked on the upper end surface of the expansion sleeve mounting platform through a locking assembly, the inner side of the lower part of the expansion sleeve is an inner taper hole, and the inner taper hole of the expansion sleeve is sleeved on the tensioning platform; the tail end of the shaft hole of the positioning shaft is connected with a plug through threads, and a spring is arranged between the upper end face of the plug and the lower end face of the movable shaft. The automatic tensioning centering device is compact and reasonable in structure and convenient to operate, adopts a mechanical structure to realize automatic tensioning centering of workpieces with inner holes, is low in cost and is convenient to change models.

Description

Replaceable inner hole automatic tensioning centering mechanism

Technical Field

The utility model relates to the technical field of automatic tensioning and centering mechanisms, in particular to a replaceable inner hole automatic tensioning and centering mechanism.

Background

As shown in figure 1, the belt pulley with the inner hole needs to detect the parameter requirements of other characteristics on a workpiece, such as the runout and the like relative to the reference of the inner hole A by taking the inner hole as the reference A, and when the detection is carried out, the inner hole A of the workpiece needs to be automatically tensioned and centered, and then dynamic measurement is realized under the rotation state of the workpiece.

In the prior art, an automatic tensioning and centering mechanism for detecting workpieces with inner holes mainly comprises a pneumatic structure and a hydraulic structure. However, the automatic tensioning and centering mechanisms of the pneumatic structure and the hydraulic structure have the following defects:

1. the price is high, the delivery period is long, the project cost is greatly increased, and the project schedule is influenced;

2. the device can be used only by receiving liquid or gas, the quality of the gas and the liquid is also required, and the difficulty in construction and equipment maintenance is high;

3. when the measuring machine is compatible with various types of detection, multiple sets of automatic tensioning and centering mechanisms are required to be arranged and need to be switched in a mode of changing models;

4. pneumatic and hydraulic type model changing are complex, liquid and gas are required to be connected again for each model changing, the error risk after the model changing is high, the requirement on the professional skills of model changing personnel is very high, and the model changing time is long.

SUMMERY OF THE UTILITY MODEL

The application is directed at the shortcoming among the above-mentioned prior production technique, provides an automatic tight centering mechanism that rises of remodelling hole, adopts mechanical structure to realize the automatic tight centering that rises of the work piece of in-band hole class, and is with low costs and be convenient for remodelling and change.

The technical scheme adopted by the utility model is as follows:

a replaceable inner hole automatic tensioning and centering mechanism comprises a positioning shaft, wherein a shaft hole which is communicated up and down is formed in the positioning shaft, and a movable shaft which can slide up and down is arranged in the shaft hole; the upper part of the positioning shaft is provided with a tensioning platform with a cone frustum structure, the outer surface of the movable shaft is provided with an expansion sleeve mounting platform, the expansion sleeve mounting platform is positioned above the positioning shaft, an expansion sleeve is sleeved on the movable shaft, the upper part of the expansion sleeve is locked on the upper end surface of the expansion sleeve mounting platform through a locking assembly, the inner side of the lower part of the expansion sleeve is an inner taper hole, and the inner taper hole of the expansion sleeve is sleeved on the tensioning platform; the tail end of the shaft hole of the positioning shaft is connected with a plug through threads, and a spring is arranged between the upper end face of the plug and the lower end face of the movable shaft.

Furthermore, locking Assembly includes lock nut, and lock nut passes through threaded connection on the loose axle, sets up the gasket between lock nut and the cover up end that rises, and lock nut and gasket can lock the cover that rises on the cover mount table.

Further, the cover that rises evenly sets up a plurality of grooves that rise along the circumferential surface, and a plurality of grooves that rise evenly distributed along the cover circumferential surface that rises, the groove that rises is T font structure, and the open end in the groove that rises of T font structure extends to the upper end face or the lower terminal surface that rises to the open end opposite direction in two adjacent grooves that rise.

Furthermore, the lower end face of the movable shaft is provided with an upper spring mounting groove, the upper end face of the plug is provided with a lower spring mounting groove, the upper portion of the spring extends into the upper spring mounting groove, and the lower portion of the spring extends into the lower spring mounting groove.

Furthermore, a supporting table is arranged in the middle of the positioning shaft and can support the lower end face of the workpiece.

Furthermore, the lower part of the positioning shaft is provided with an installation platform, the installation platform is provided with installation screws, and the positioning shaft can be fixed on the workbench through the installation screws.

Furthermore, a limiting pin mounting plate is arranged on the mounting table, an angular limiting pin is vertically arranged on the limiting pin mounting plate, and the angular limiting pin is used for limiting the angular position of the workpiece.

The utility model has the following beneficial effects:

the automatic tensioning centering device is compact and reasonable in structure and convenient to operate, adopts a mechanical structure to realize automatic tensioning centering of workpieces with inner holes, is low in cost and is convenient to replace the models.

Drawings

FIG. 1 is a schematic diagram of a prior art workpiece with holes for jitter measurement.

Fig. 2 is a front view of a half-section according to an embodiment of the present invention.

FIG. 3 is a front view of a half-sectional view of a second embodiment of the present invention.

Fig. 4 is a structure view of the expansion sleeve.

Fig. 5 is a view showing the structure of the positioning shaft.

Fig. 6 is a view showing a structure of a movable shaft.

Wherein: 1. a movable shaft; 1.1, an expansion sleeve mounting table; 2. positioning the shaft; 2.1, tensioning the platform; 2.2, supporting the table; 2.3, mounting a platform; 3. a spring; 4. plugging by screwing; 5. expanding sleeves; 5.1, expanding the groove; 6. locking the nut; 7. a gasket; 8. an upper spring mounting groove; 9. a lower spring mounting groove; 10. mounting screws; 11. a limit pin mounting plate; 12. an angular limit pin.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

In the first embodiment shown in fig. 2, an exchangeable inner hole automatic tensioning and centering mechanism mainly includes a positioning shaft 2, a shaft hole penetrating up and down is formed in the positioning shaft 2, and a movable shaft 1 capable of sliding up and down is arranged in the shaft hole.

In the first embodiment shown in fig. 2 and 6, the tensioning platform 2.1 in a cone frustum structure is arranged at the upper part of the positioning shaft 2, the expansion sleeve mounting platform 1.1 is arranged on the outer surface of the movable shaft 1, the expansion sleeve mounting platform 1.1 is located above the positioning shaft 2, and the expansion sleeve mounting platform 1.1 cannot move down due to the blocking of the tensioning platform 2.1. The movable shaft 1 is sleeved with the expansion sleeve 5, the upper part of the expansion sleeve 5 is locked on the upper end face of the expansion sleeve mounting table 1.1 through a locking assembly, the inner side of the lower part of the expansion sleeve 5 is an inner taper hole, the inner taper hole of the expansion sleeve 5 is sleeved on the expansion table 2.1, when the movable shaft 1 is pressed down, the movable shaft 1 can drive the expansion sleeve 5 to move downwards, and the expansion table 2.1 is of a cone frustum structure, so that the downward expansion sleeve 5 is unfolded, and the expansion effect on the inner hole of the workpiece is realized.

In the first embodiment shown in fig. 2, the locking assembly comprises a locking nut 6, the locking nut 6 is connected to the movable shaft 1 through threads, a gasket 7 is arranged between the locking nut 6 and the upper end face of the expansion sleeve 5, and the locking nut 6 and the gasket 7 can lock the expansion sleeve 5 on the expansion sleeve mounting table 1.1.

In the embodiment shown in fig. 5, the expansion sleeve 5 is provided with a plurality of expansion slots 5.1 uniformly along the circumferential surface, and the plurality of expansion slots 5.1 are uniformly distributed along the circumferential surface of the expansion sleeve. The expansion grooves 5.1 are of T-shaped structures, the open ends of the expansion grooves 5.1 of the T-shaped structures extend to the upper end face or the lower end face of the expansion sleeve 5, and the open ends of two adjacent expansion grooves 5.1 are opposite in direction.

In the first embodiment shown in fig. 2, the end of the shaft hole of the positioning shaft 2 is connected with a plug 4 through a thread, a spring 3 is arranged between the upper end surface of the plug 4 and the lower end surface of the movable shaft 1, and the spring 3 can enable the movable shaft 1 to return to the original position.

In the first embodiment shown in fig. 2, the lower end surface of the movable shaft 1 is provided with an upper spring installation groove 8, the upper end surface of the plug 4 is provided with a lower spring installation groove 9, the upper part of the spring 3 extends into the upper spring installation groove 8, and the lower part of the spring 3 extends into the lower spring installation groove 9.

In the first embodiment shown in fig. 2 and 5, a support table 2.2 is disposed in the middle of the positioning shaft 2, and the support table 2.2 can support the lower end face of the workpiece.

In the first embodiment shown in fig. 2 and 5, a mounting table 2.3 is provided below the positioning shaft 2, a mounting screw 10 is provided on the mounting table 2.3, and the positioning shaft 2 can be fixed to the table by the mounting screw 10.

In the second embodiment shown in fig. 2, a limit pin mounting plate 11 is arranged on the mounting table 2.3, an angular limit pin 12 is vertically arranged on the limit pin mounting plate 11, and the angular limit pin 12 is used for limiting the angular position of the workpiece.

The working principle of the utility model is as follows: the workpiece with the hole is automatically fed by a robot or manually fed into an automatic measuring machine by an operator, an inner hole of the workpiece is freely sleeved on the expansion sleeve 5, then the top pressure rod is automatically pressed downwards by the driving of the air cylinder, the movable shaft 1 is pressed downwards, the movable shaft 1 drives the expansion sleeve 5 to move downwards, the inner hole of the expansion sleeve 5 is in an inner cone shape, a tensioning platform 2.1 in matched contact with the expansion sleeve is in a cone frustum structure, the expansion sleeve 5 moves downwards, and the tensioning platform 2.1 pushes the expansion sleeve to expand and brace the inner hole of the workpiece, so that the workpiece is automatically centered. When the measuring machine needs to measure various types of workpieces, only a plurality of mechanisms need to be manufactured, and only an operator needs to manually dismount a plurality of mounting screws on the periphery of the positioning shaft during model changing, so that the measuring machine is simple, convenient and quick.

The above description is intended to illustrate the present invention and not to limit the present invention, which is defined by the scope of the claims, and may be modified in any manner within the scope of the present invention.

Claims

1. The utility model provides an automatic tight centering mechanism that rises of hole of remodeling, includes location axle (2), its characterized in that: a shaft hole which is through up and down is arranged in the positioning shaft (2), and a movable shaft (1) which can slide up and down is arranged in the shaft hole; the upper part of the positioning shaft (2) is provided with a tensioning platform (2.1) with a cone frustum structure, the outer surface of the movable shaft (1) is provided with an expanding sleeve mounting platform (1.1), the expanding sleeve mounting platform (1.1) is positioned above the positioning shaft (2), the movable shaft (1) is sleeved with an expanding sleeve (5), the upper part of the expanding sleeve (5) is locked on the upper end surface of the expanding sleeve mounting platform (1.1) through a locking assembly, the inner side of the lower part of the expanding sleeve (5) is provided with an inner taper hole, and the inner taper hole of the expanding sleeve (5) is sleeved on the tensioning platform (2.1); the tail end of the shaft hole of the positioning shaft (2) is connected with a plug (4) through threads, and a spring (3) is arranged between the upper end face of the plug (4) and the lower end face of the movable shaft (1).

2. The replaceable inner hole automatic tensioning and centering mechanism as claimed in claim 1, wherein: locking Assembly includes lock nut (6), and lock nut (6) pass through threaded connection on loose axle (1), set up gasket (7) between lock nut (6) and the cover (5) up end that rises, and lock nut (6) and gasket (7) can lock the cover (5) that rises on the cover mount table (1.1) that rises.

3. The replaceable inner hole automatic tensioning and centering mechanism as claimed in claim 1, wherein: the expansion sleeve (5) is uniformly provided with a plurality of expansion grooves (5.1) along the circumferential surface, the expansion grooves (5.1) are uniformly distributed along the circumferential surface of the expansion sleeve, the expansion grooves (5.1) are of a T-shaped structure, the opening end of each expansion groove (5.1) of the T-shaped structure extends to the upper end surface or the lower end surface of the expansion sleeve (5), and the opening ends of two adjacent expansion grooves (5.1) are opposite in direction.

4. The replaceable inner hole automatic tensioning and centering mechanism as claimed in claim 1, wherein: the lower end face of the movable shaft (1) is provided with an upper spring mounting groove (8), the upper end face of the plug (4) is provided with a lower spring mounting groove (9), the upper portion of the spring (3) extends into the upper spring mounting groove (8), and the lower portion of the spring (3) extends into the lower spring mounting groove (9).

5. The replaceable inner hole automatic tensioning and centering mechanism as claimed in claim 1, wherein: the middle part of the positioning shaft (2) is provided with a support table (2.2), and the support table (2.2) can support the lower end face of the workpiece.

6. The replaceable inner hole automatic tensioning and centering mechanism as claimed in claim 5, wherein: the lower part of the positioning shaft (2) is provided with an installation platform (2.3), the installation platform (2.3) is provided with an installation screw (10), and the positioning shaft (2) can be fixed on the workbench through the installation screw (10).

7. The replaceable inner hole automatic tensioning and centering mechanism as claimed in claim 6, wherein: the mounting table (2.3) is provided with a limiting pin mounting plate (11), and the limiting pin mounting plate (11) is vertically provided with an angular limiting pin (12).