CN212356070U

CN212356070U - Mechanical expansion shaft

Info

Publication number: CN212356070U
Application number: CN202020337492.4U
Authority: CN
Inventors: 戎绍辉
Original assignee: Changzhou Rongjiu Machinery Co ltd
Current assignee: Changzhou Rongjiu Machinery Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2021-01-15
Anticipated expiration: 2030-03-17

Abstract

The utility model discloses a mechanical expansion shaft, which comprises a shaft sleeve and a mandrel rotatably arranged in the shaft sleeve; a plurality of telescopic key pins are circumferentially arranged on the shaft sleeve; the mandrel is provided with bulges which are consistent with the key pins in number and are suitable for pushing the key pins; at least one magnet is arranged on the inner end face of the key pin, and the key pin is adsorbed on the mandrel through the magnet. The utility model discloses a machinery rises the axle and passes through the dabber and rotates, and the arch supports key round pin jack-up, makes key round pin and sleeve to fix the sleeve and rise epaxially at machinery, when arch and key round pin stagger, magnet make key round pin and pivot adsorb together, thereby control key round pin withdrawal, through mechanical system control key round pin flexible, compare with the inflatable shaft, do not receive the atmospheric pressure influence, the tight power that rises is big and stable, the noise is low during the operation, simple structure, long service life.

Description

Mechanical expansion shaft

Technical Field

The utility model relates to a support the axle that rises, especially relate to a machinery axle that rises.

Background

The shaft that rises is usually used for the cover to put and fix a roll material section of thick bamboo, and the axle that rises that has now mostly adopts the inflatable axle, and it is internal with ejector block place axle insert axle when using, then pours into gas, and it is ejecting with the ejector block through atmospheric pressure effect, and the support intensity of roll material section of thick bamboo has been guaranteed to the tight material pipe of will rolling up through the ejector block. But the inflatable shaft is ejecting with the kicking block through rushing into gas for this inflatable shaft noise is great when using, uses pneumatic drive, and the clamp force is not enough, and this inflatable shaft need insert the air supply, and the structure is complicated, and required cost is high, and the part loss is fast.

Therefore, a mechanical expansion shaft which is simple to control and firm in expansion is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control is simple, rises and tightly firmly machinery rises axle.

Realize the utility model discloses the technical scheme of purpose is: a mechanical expansion shaft comprises a shaft sleeve and a mandrel rotatably arranged in the shaft sleeve; a plurality of telescopic key pins are circumferentially arranged on the shaft sleeve; the mandrel is provided with bulges which are consistent with the key pins in number and are suitable for pushing the key pins; at least one magnet is arranged on the inner end face of the key pin, and the key pin is adsorbed on the mandrel through the magnet.

Three telescopic key pins are uniformly distributed on the shaft sleeve in the circumferential direction; the bulge is in arc transition connection with the mandrel. The mandrel is made to be a triangle with a chamfer angle at the vertex angle.

The shaft sleeve is rotatably connected with the mandrel through a bearing.

The bearing comprises a mandrel bearing and a shaft sleeve bearing; the mandrel bearing is fixed at the bottom of the mandrel through a clamp spring; the outer ring of the mandrel bearing is fixedly connected with the inner circumferential surface of the shaft sleeve; the shaft sleeve bearing is fixed at the top of the shaft sleeve through a clamp spring; and the inner ring of the shaft sleeve bearing is fixedly connected with the peripheral surface of the mandrel.

The top end surface of the key pin is arc-shaped; the end face of the top of the key pin is provided with insections.

Pin holes are formed in the bottoms of the two sides of the key pins; and a cylindrical pin suitable for limiting the key pin from falling out is inserted in the pin hole.

The bottom end of the mandrel is concentrically provided with a flange plate; and a plurality of mounting through holes are formed in the circumferential direction of the flange plate.

The top end of the shaft sleeve is provided with an end cover; a threaded hole is formed in the center of the end face of the top end of the mandrel; a fixing through hole is formed in the center of the end cover; the end cover is used for connecting and fixing the threaded hole and the fixing through hole in a threaded manner at the top end of the mandrel through a flat head screw.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

(1) the utility model discloses a machinery rises the axle and passes through the dabber and rotates, and the arch supports key round pin jack-up, makes key round pin and sleeve to fix the sleeve and rise epaxially at machinery, when arch and key round pin stagger, magnet make key round pin and pivot adsorb together, thereby control key round pin withdrawal, through mechanical system control key round pin flexible, compare with the inflatable shaft, do not receive the atmospheric pressure influence, the tight power that rises is big and stable, the noise is low during the operation, simple structure, long service life.

(2) The utility model discloses a key round pin circumference equipartition has threely, and the atress is even, protruding and dabber arc transitional coupling, and the rotation of dabber is more convenient, and the ascending decline process of key round pin is level and smooth accurate more.

(3) The utility model discloses an axle sleeve passes through the bearing and is connected with the dabber rotation, rotates more level and smooth, and frictional force is littleer.

(4) The utility model discloses a bearing is respectively in dabber bottom and axle sleeve top, and the bearing setting at dabber top is difficult for blocking when cup jointing the axle sleeve in the axle sleeve, cup joints more conveniently.

(5) The utility model discloses a top end face of key round pin is the arc, and is inseparabler with telescopic inner wall contact, is equipped with the insection, and frictional force is bigger when contacting with the sleeve, and is fixed more firmly.

(6) The bottom parts of the two sides of the key pin of the utility model are provided with pin holes; the pin hole is internally inserted with a cylindrical pin suitable for limiting the key pin from falling out, so that the key pin can be prevented from falling out of the shaft sleeve.

(7) The bottom end of the mandrel of the utility model is concentrically provided with a flange plate; the ring flange is provided with a plurality of mounting through holes along the circumference, can fix on other equipment through the through-hole, and is fixed convenient.

(8) The utility model discloses an axle sleeve is equipped with and fixes the end cover on the dabber top through flat head screw and screw hole threaded connection, can prevent that dust etc. from falling into in the axle sleeve, further prevents that the axle sleeve from droing simultaneously.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is an axial sectional view of the present invention.

Fig. 2 is a schematic structural diagram of a side view direction of the present invention.

Fig. 3 is a schematic structural view of the key pin in a side view direction according to the present invention.

Fig. 4 is a schematic view of the key pin structure of the present invention with a plurality of magnets mounted thereon.

The reference numbers in the drawings are as follows: the magnetic core comprises a shaft sleeve 1, a core shaft 2, threaded holes 2-1, a key pin 3, insections 3-1, pin holes 3-2, cylindrical pins 3-3, protrusions 4, a magnet 5, a core shaft bearing 6, a shaft sleeve bearing 7, a flange plate 8 and an end cover 9.

Detailed Description

(example 1)

Referring to fig. 1 to 3, the mechanical expansion shaft of the present embodiment includes a shaft sleeve 1 and a spindle 2 rotatably disposed in the shaft sleeve 1. A plurality of retractable key pins 3 are circumferentially arranged on the shaft sleeve 1. The mandrel 2 is provided with protrusions 4 which are suitable for pushing up the key pins 3 and the number of the protrusions is consistent with that of the key pins 3. At least one magnet 5 is arranged on the inner end face of the key pin 3, and the key pin 3 is adsorbed on the mandrel 2 through the magnet 5. The machinery of this embodiment rises the axle and passes through dabber 2 and rotates, protruding 4 with 3 jack-ups of key round pin, make key round pin 3 and sleeve support, thereby fix the sleeve on the machinery rises epaxially, when protruding 4 staggers with key round pin 3, magnet 5 makes key round pin 3 and pivot adsorb together, thereby control key round pin 3 withdrawal, it is flexible through mechanical means control key round pin 3, compare with the inflatable shaft, do not receive the atmospheric pressure influence, the tight power that rises is big and stable, the noise is low during the operation, moreover, the steam generator is simple in structure, long service life.

Three telescopic key pins 3 are uniformly distributed on the shaft sleeve 1 in the circumferential direction. The bulge 4 is in arc transition connection with the mandrel 2. The mandrel 2 is made to be a triangle with a chamfer angle at the vertex angle. The key pins 3 are evenly distributed in the circumferential direction, the stress is uniform, the protrusions 4 are in arc-shaped transitional connection with the core shaft 2, the core shaft 2 is more convenient to rotate, and the ascending and descending processes of the key pins 3 are smoother and more accurate.

In order to reduce the friction force, the shaft sleeve 1 is rotatably connected with the mandrel 2 through a bearing, so that the rotation is smoother, and the friction force is smaller.

For ease of sleeving, the bearings comprise a spindle bearing 6 and a sleeve bearing 7. The mandrel bearing 6 is fixed at the bottom of the mandrel 2 through a clamp spring. The outer ring of the mandrel bearing 6 is fixedly connected with the inner circumferential surface of the shaft sleeve 1. The shaft sleeve bearing 7 is fixed on the top of the shaft sleeve 1 through a snap spring. The inner ring of the shaft sleeve bearing 7 is fixedly connected with the outer peripheral surface of the mandrel 2, and the bearings are respectively arranged at the bottom of the mandrel 2 and the top of the shaft sleeve 1, so that the sleeve connection is more convenient.

For firm fixation, the top end surface of the key pin 3 is arc-shaped. The end face of the top of the key pin 3 is provided with the insection 3-1, the end face of the top of the key pin 3 is arc-shaped and is in closer contact with the inner wall of the sleeve, and the insection 3-1 is arranged, so that the frictional force is larger when the insection is in contact with the sleeve, and the fixation is firmer.

In order to prevent the key pin 3 from falling out, the bottom parts of the two sides of the key pin 3 are provided with pin holes 3-2. A cylindrical pin 3-3 which is suitable for limiting the key pin 3 from falling out is inserted in the pin hole 3-2.

For fixing convenience, the bottom end of the mandrel 2 is concentrically provided with a flange 8. The ring flange 8 is circumferentially provided with a plurality of mounting through holes, and can be fixed on other equipment through the through holes.

In order to increase the sealing performance, the top end of the shaft sleeve 1 is provided with an end cover 9. The center of the end surface of the top end of the mandrel 2 is provided with a threaded hole 2-1. And a fixing through hole is formed in the center of the end cover 9. The end cover 9 is used for connecting the threaded hole 2-1 with the fixed through hole through a flat head screw in a threaded manner and fixing the threaded hole at the top end of the mandrel 2. Dust and the like can be prevented from falling into the shaft sleeve 1, and the shaft sleeve 1 is further prevented from falling off.

The use principle of the embodiment is as follows: the flange plate 8 is fixed through the installation through hole, the cylindrical pin 3-3 is inserted into the pin hole 3-2, the key pin 3 is placed into the shaft sleeve 1 from one end of the shaft sleeve 1, and then the shaft sleeve 1 is sleeved on the mandrel 2. The end cap 9 is fixed on the mandrel 2 by a flat head screw, thereby fixing the shaft sleeve 1, sleeving the sleeve, and rotating the mandrel 2 to extend the key pin 3 to fix the sleeve. When it is desired to remove the sleeve, the spindle 2 is rotated to retract the key pin 3.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A mechanical expanding shaft is characterized in that: comprises a shaft sleeve (1) and a mandrel (2) which is rotatably arranged in the shaft sleeve (1); a plurality of telescopic key pins (3) are circumferentially arranged on the shaft sleeve (1); the mandrel (2) is provided with bulges (4) which are consistent with the key pins (3) in number and are suitable for pushing up the key pins (3); the inner end face of the key pin (3) is provided with at least one magnet (5), and the key pin (3) is adsorbed on the mandrel (2) through the magnet (5).

2. The mechanical expanding shaft of claim 1, wherein: three telescopic key pins (3) are uniformly distributed on the shaft sleeve (1) in the circumferential direction; the bulge (4) is in arc transition connection with the core shaft (2).

3. The mechanical expanding shaft of claim 1, wherein: the shaft sleeve (1) is rotatably connected with the mandrel (2) through a bearing.

4. A mechanical expansion shaft according to claim 3, characterized in that: the bearing comprises a mandrel bearing (6) and a shaft sleeve bearing (7); the mandrel bearing (6) is fixed at the bottom of the mandrel (2) through a clamp spring; the outer ring of the mandrel bearing (6) is fixedly connected with the inner circumferential surface of the shaft sleeve (1); the shaft sleeve bearing (7) is fixed at the top of the shaft sleeve (1) through a clamp spring; the inner ring of the shaft sleeve bearing (7) is fixedly connected with the outer peripheral surface of the mandrel (2).

5. The mechanical expanding shaft of claim 1, wherein: the top end surface of the key pin (3) is arc-shaped; the end surface of the top of the key pin (3) is provided with insections (3-1).

6. The mechanical expanding shaft of claim 1, wherein: pin holes (3-2) are formed in the bottoms of the two sides of the key pin (3); a cylindrical pin (3-3) suitable for limiting the key pin (3) from falling out is inserted into the pin hole (3-2).

7. The mechanical expanding shaft of claim 1, wherein: the bottom end of the mandrel (2) is concentrically provided with a flange plate (8); and a plurality of mounting through holes are formed in the circumferential direction of the flange plate (8).

8. The mechanical expanding shaft of claim 1, wherein: an end cover (9) is arranged at the top end of the shaft sleeve (1); a threaded hole (2-1) is formed in the center of the end face of the top end of the mandrel (2); a fixing through hole is formed in the center of the end cover (9); the end cover (9) is used for connecting and fixing the threaded hole (2-1) and the fixed through hole in a threaded manner on the top end of the mandrel (2) through a flat head screw.