CN218080468U

CN218080468U - Fine turning excircle spline tensioning mandrel

Info

Publication number: CN218080468U
Application number: CN202221925152.9U
Authority: CN
Inventors: 李瑞洋; 钟国海; 高飞
Original assignee: Jiangsu Kunlun Machinery Manufacturing Co ltd
Current assignee: Jiangsu Kunlun Machinery Manufacturing Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-12-20
Anticipated expiration: 2032-07-25

Abstract

The utility model discloses a finish turning excircle spline tensioning mandrel, which comprises a mandrel and a clamping body, wherein an expansion sleeve is sleeved at the middle part of the mandrel, an elastic sleeve is arranged between the mandrel and the clamping body, a locking block is arranged at one end of the mandrel close to the elastic sleeve, an elastic part is arranged in the elastic sleeve, and the elastic part is arranged between the clamping body and the locking block; wherein, when loosening along with the latch segment, the elastic component acts on latch segment and centre gripping main part simultaneously, realizes that latch segment and centre gripping main part break away from the elastic sleeve fast. The gradual change spring props big elastic component position in advance to a certain extent through the gradual change spring before the latch segment or the centre gripping body prop big elastic sleeve, realizes that the cover deformation process that rises is mild, and the extension rises to overlap long service life, and direct external conical surface props big elastic sleeve, causes the elastic sleeve violence to prop badly easily, shortens the life of elastic sleeve.

Description

Fine turning excircle spline tensioning mandrel

Technical Field

The utility model belongs to the technical field of the tensioning dabber, concretely relates to finish turning excircle spline rises and tightly dabber.

Background

The tensioning mandrel is generally divided into two major types, namely a mechanical type and a hydraulic type, wherein the mechanical type is a three-tile type, the sliding sleeve type and the like are pushed by a tile on a component such as a nut and the like, so that the tile can move inwards and outwards along the radial direction of the mandrel to change the diameter to realize expansion and contraction, the sliding sleeve type and the like are specifically generally composed of an internal conical surface and an external conical surface at one end, a plurality of open grooves are uniformly distributed on the circumference of the expansion sleeve, the expansion sleeve deforms when an external cone is locked to press an internal cone, and the diameter of the expansion sleeve is increased to tighten parts.

The deformation that the one end of conical surface produced was will be great relatively when the tight dabber that rises uses at present, and the volume that produces deformation moreover is the condition that diminishes gradually to the other end by the opening tip of contact earlier, and elastic sleeve inflation deformation is inhomogeneous, and is inhomogeneous with the contact force of the part that is tightened for the life of elastic sleeve shortens, and the deformation process is too urgent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a finish turning excircle spline rises and tightly dabber to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a spline tensioning mandrel for a finish turning excircle comprises a mandrel and a clamping body, wherein an expansion sleeve is sleeved in the middle of the mandrel, an elastic sleeve is arranged between the mandrel and the clamping body, a locking block is arranged at one end, close to the elastic sleeve, of the mandrel, an elastic part is arranged in the elastic sleeve, and the elastic part is arranged between the clamping body and the locking block;

wherein, when loosening along with the latch segment, the elastic component acts on latch segment and clamping body simultaneously, realizes that latch segment and clamping body break away from the elastic sleeve fast.

Preferably, the elastic part is a gradual spring with the inner diameter gradually increased from small to large, the number of the elastic parts is two, the small ends of the two elastic parts are opposite, and the large ends of the two elastic parts are arranged back to back.

Preferably, the mandrel is provided with a locking nut at one end far away from the expansion sleeve, and a plurality of notches for holding are arranged around the locking nut at equal intervals.

Preferably, one end of the mandrel, which is close to the locking block, is connected with a locking bolt, and one side of the locking block, which is close to the locking bolt, is provided with a threaded hole for inserting the locking bolt.

Preferably, one side of the clamping body, which is close to the elastic sleeve, is provided with a convex part, and the convex part, the locking block and the opposite surface of the elastic sleeve are both provided with outer conical surfaces for clamping the elastic sleeve.

Preferably, one end of the locking block, which is close to the elastic sleeve, is connected with a guide post, and a through hole for inserting the guide post is formed in the convex part.

Preferably, a cross washer is arranged on the mandrel between the expansion sleeve and the locking nut.

The utility model discloses a technological effect and advantage: this fine turning excircle spline rises and tightly dabber props big elastic component position in advance to a certain extent through gradual change spring before latch segment or the big elastic sleeve of supporting body, realizes that the cover deformation process that rises is mild, and the extension rises overlaps long service life, and direct external conical surface is not propped big elastic sleeve, causes the elastic sleeve violence easily and props badly, shortens the life of elastic sleeve.

Drawings

Fig. 1 is a schematic overall view of the first perspective structure of the present invention;

fig. 2 is a schematic view of an overall second perspective structure of the present invention;

fig. 3 is a schematic structural view of the notch of the present invention.

In the figure: 1. a mandrel; 2. expanding sleeves; 3. a locking block; 4. a guide post; 5. an elastic member; 6. an elastic sleeve; 7. locking the bolt; 8. locking the nut; 9. a notch; 10. a clamping body; 11. a convex portion; 12. a through hole; 13. a threaded hole; 14. a cross washer.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

For the convenience of prolonging the service life of the elastic sleeve 6, refer to fig. 1 and 3, and include dabber 1 and clamping body 10, the middle part cover is equipped with the cover 2 that rises on dabber 1, be provided with elastic sleeve 6 between dabber 1 and the clamping body 10, and dabber 1 is close to 6 one end of elastic sleeve and is provided with latch segment 3, be provided with elastic component 5 in the elastic sleeve 6, elastic component 5 sets up between clamping body 10 and latch segment 3, and elastic component 5 is gradual change spring, for the spring of stereoplasm material, and the helix of spring is the archimedes spiral, therefore the spring is the gradual change spring of internal diameter by little gradual grow, the tapering of gradual change spring and the tapering phase-match of the interior conical surface of elastic sleeve 6, and when latch segment 3 unclamped, elastic component 5 acts on latch segment 3 and clamping body 10 simultaneously, realizes that latch segment 3 and clamping body 10 break away from elastic sleeve 6 fast.

In order to facilitate the automatic alignment and centering function in the device process, referring to fig. 1, fig. 2 and fig. 3, the elastic member 5 is a gradual spring with an inner diameter gradually increasing from small to large, the number of the elastic members 5 is two, the small ends of the two elastic members 5 are opposite, the large ends of the two elastic members are arranged back to back, the minimum inner diameter of the gradual spring is larger than or equal to the minimum inner diameter of the elastic sleeve 6, the maximum inner diameter of the gradual spring is smaller than the maximum inner diameter of the elastic sleeve 6, the gradual spring is compressed when the locking block 3 is close to the clamping main body, each circle of spiral line moves inwards, the outer conical surface of the locking block 3 supports the small ends of the inner part of the elastic sleeve 6 to a certain extent, all positions of the elastic sleeve 6 in the axial direction are supported by stress to be large, the elastic sleeve 6 expands and deforms uniformly, the contact force with the tightened part is uniform, and the combination firmness of the elastic sleeve 6 and the part is improved. The mandrel 1 is kept away from the one end of the expansion sleeve 2 and is provided with a locking nut 8, a plurality of notches 9 for holding are arranged around the locking nut 8 at equal intervals, a worker can hold the locking nut conveniently through the notches 9, and convenience and accessibility are improved. The locking device is characterized in that one end, close to the locking block 3, of the mandrel 1 is connected with a locking bolt 7, one side, close to the locking bolt 7, of the locking block 3 is provided with a threaded hole 13 for inserting the locking bolt 7, and the locking bolt 7 is inserted into the threaded hole 13, so that the locking block 3 can be connected with the mandrel 1. The clamping body 10 is close to elastic sleeve 6 one side and is provided with convex part 11, convex part 11 and latch segment 3 all are provided with the outer conical surface that is used for joint elastic sleeve 6 with the opposite face of elastic sleeve 6, latch segment 3 is close to 6 one end of elastic sleeve and is connected with guide post 4, set up in the convex part 11 and be used for guide post 4 male through-hole 12, at the in-process that the clamping body 10 is close to, the small skew of guide post 4 can be corrected automatically to conical guiding hole, leads guide post 4 to the central line position, realizes the automatic centering of device in-process. The mandrel 1 between the expansion sleeve 2 and the locking nut 8 is provided with a cross washer 14, the cross washer 14 is used for pressing the expansion sleeve 2, two ends of the cross washer 14 are provided with crossed arc surfaces, pressing force is concentrated when the expansion sleeve is used, self-locking performance is good, and when the locking nut 8 and the expansion sleeve 2 are not parallel slightly, self-adaption can be achieved.

Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention.

Claims

1. The finish turning excircle spline tensioning mandrel is characterized by comprising a mandrel (1) and a clamping body (10), wherein an expansion sleeve (2) is sleeved at the upper middle part of the mandrel (1), an elastic sleeve (6) is arranged between the mandrel (1) and the clamping body (10), a locking block (3) is arranged at one end, close to the elastic sleeve (6), of the mandrel (1), an elastic part (5) is arranged in the elastic sleeve (6), and the elastic part (5) is arranged between the clamping body (10) and the locking block (3);

wherein, when the locking block (3) is loosened, the elastic piece (5) acts on the locking block (3) and the clamping body (10) at the same time, and the locking block (3) and the clamping body (10) are separated from the elastic sleeve (6) quickly.

2. The cylindrical spline finish turning tensioning mandrel as claimed in claim 1, wherein: the elastic pieces (5) are gradual springs with gradually-increased inner diameters, the number of the elastic pieces (5) is two, the small ends of the two elastic pieces (5) are opposite, and the large ends of the two elastic pieces (5) are arranged back to back.

3. The cylindrical spline finish turning tensioning mandrel as claimed in claim 1, wherein: dabber (1) is kept away from cover (2) one end that rises and is provided with lock nut (8), is provided with a plurality of breach (9) that are used for controlling around lock nut (8) a week equidistance interval.

4. The cylindrical spline finish turning tensioning mandrel as claimed in claim 1, wherein: the locking device is characterized in that one end, close to the locking block (3), of the mandrel (1) is connected with a locking bolt (7), and one side, close to the locking bolt (7), of the locking block (3) is provided with a threaded hole (13) for inserting the locking bolt (7).

5. The finish turning excircle spline tensioning mandrel of claim 4, characterized in that: the clamping body (10) is provided with a convex part (11) near one side of the elastic sleeve (6), and the convex part (11) and the opposite surfaces of the locking block (3) and the elastic sleeve (6) are provided with outer conical surfaces for clamping the elastic sleeve (6).

6. The finish turning excircle spline tensioning mandrel of claim 5, characterized in that: one end of the locking block (3) close to the elastic sleeve (6) is connected with the guide post (4), and a through hole (12) for inserting the guide post (4) is formed in the convex part (11).

7. The cylindrical spline finish turning tensioning mandrel as claimed in claim 1, wherein: and a cross washer (14) is arranged on the mandrel (1) between the expansion sleeve (2) and the locking nut (8).