CN219341313U

CN219341313U - Single gas circuit embeds cylinder formula machinery expansion axle

Info

Publication number: CN219341313U
Application number: CN202320850522.5U
Authority: CN
Inventors: 晋奔
Original assignee: Dongguan Jiahe Precision Parts Co ltd
Current assignee: Dongguan Jiahe Precision Parts Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-07-14
Anticipated expiration: 2033-04-14

Abstract

The utility model discloses a single-gas-path built-in cylinder type mechanical expansion shaft, which comprises an expansion shaft body, a rotating main shaft, an expansion mechanism and a reset mechanism, wherein the expansion shaft body is provided with a plurality of expansion grooves; an expansion shaft cavity is arranged in the expansion shaft body; the side surface of the expansion shaft body is provided with an expansion port communicated with the expansion shaft cavity; the rotating main shaft is arranged at the top of the expansion shaft main body and is communicated with the expansion shaft cavity; the expansion mechanism comprises a connecting block, an expansion tile, an expansion block, a piston and an expansion key; the connecting block is arranged in the expansion opening in a sliding way; one side of the connecting block is provided with a wedge block; the expansion tile is arranged on one side of the connecting block and is arranged on the outer side of the expansion shaft body in a wrapping mode; the expansion block is movably arranged in the expansion shaft cavity; the piston is arranged in the expansion shaft cavity in a sliding manner and is arranged at the top of the expansion block; the piston is positioned below the air outlet of the ventilation pipeline in the rotating main shaft; the expansion key is arranged on the side surface of the expansion block; wedge grooves are formed in the side faces of the expansion keys; the wedge block is arranged in the wedge groove in a sliding way; the reset mechanism is arranged between the inner bottom wall of the expansion shaft cavity and the bottom of the expansion block.

Description

Single gas circuit embeds cylinder formula machinery expansion axle

Technical Field

The utility model belongs to the technical field of mechanical expansion shafts, and particularly relates to a single-gas-path built-in cylinder type mechanical expansion shaft.

Background

The inflatable shaft is mainly used in the film or coiled material industry, is arranged on mechanical equipment such as a splitting machine, a winding machine and the like, and after being assembled, the outer diameter of the inflatable shaft is inflated through structures such as an air bag or a machine and the like, so that the inner hole of an expanded material is reached, and then the coiled material can be subjected to various processing purposes such as splitting or winding.

There are two general structures of the current mainstream:

first kind gasbag formula inflatable shaft: a closed rubber elastic air bag is arranged in the expansion shaft hole, and air is blown to expand the air bag to drive an expansion piece on the air bag to expand and tightly expand an inner hole of the coiled material. The defects of the product are as follows: the expansion is carried out by gas, and the structure after expansion has certain elasticity, and has the following three defects:

1. when the equipment is operated or stopped, a certain amount of shaking exists, and unstable processing phenomenon can be caused in the high-precision use situation;

2. the concentricity of the coiled material after the expansion is poor, and the use requirement of high concentricity cannot be met;

3. the expansion force is relatively small due to the limitation of the gas pressure and the installation position of the air bag.

The second kind of external cylinder type mechanical expansion shaft: a mechanical expansion block with taper is arranged in a hole of the expansion shaft, the expansion block is linked with the pull rod, and the pull rod and the expansion block are driven to expand or reduce the outer diameter of the expansion shaft by controlling the front-back movement of an external cylinder. Although this structure solves three drawbacks of the first balloon type expansion shaft, it has the following drawbacks:

the cylinder structure and the pull rod structure are added, so that the whole structure is huge, other matched accessories are more, the installation is inconvenient, and the manufacturing cost is high.

Disclosure of Invention

The utility model provides a single-gas-path built-in cylinder type mechanical expansion shaft for solving the technical problems.

The utility model adopts the following solution scheme for realizing the technical effects:

a single air channel built-in cylinder type mechanical expansion shaft comprises an expansion shaft body, a rotating main shaft, an expansion mechanism and a reset mechanism; an expansion shaft cavity is arranged in the expansion shaft body; the side surface of the expansion shaft body is provided with an expansion port communicated with the expansion shaft cavity; the rotating main shaft is arranged at the top of the expanding shaft main body, and an air pipeline inside the rotating main shaft is communicated with the expanding shaft cavity; the expansion mechanism comprises a connecting block, an expansion tile, an expansion block, a piston and an expansion key; the connecting block is arranged in the expansion opening in a sliding manner; one side of the connecting block is provided with a wedge block; the inner side surface of the wedge block gradually inclines inwards from top to bottom; the expansion tile is arranged on one side of the connecting block, and the expansion tile is arranged on the outer side of the expansion shaft body in a packaged mode; the expansion block is movably arranged in the expansion shaft cavity; the piston is arranged in the expansion shaft cavity in a sliding manner, and the piston is arranged at the top of the expansion block; the piston is positioned below an air outlet of an air duct in the rotating main shaft; the expansion key is arranged on the side face of the expansion block; the side surface of the expansion key is provided with a wedge groove corresponding to the wedge block; the wedge-shaped block is arranged in the wedge-shaped groove in a sliding manner; the reset mechanism is arranged between the inner bottom wall of the expansion shaft cavity and the bottom of the expansion block.

Preferably, a sealing cavity is arranged in the expansion shaft body; the piston is slidably disposed within the seal cavity.

Preferably, the bottom of the rotating main shaft is locked in the sealing cavity; an O-shaped sealing ring is arranged between the outer side of the bottom of the rotating main shaft and the side wall of the sealing cavity.

Preferably, a sealing ring is arranged between the piston and the sealing cavity.

Preferably, a wear-resistant guide ring is arranged between the piston and the sealing cavity.

Preferably, a rotary joint is arranged at the top of the rotary main shaft.

Preferably, the reset mechanism comprises a base and a spring; the base is arranged on the inner bottom wall of the expansion shaft cavity; limiting grooves are formed in the top of the base and the bottom of the expansion block; the two ends of the spring are respectively arranged in the two limiting grooves.

The beneficial effects of the utility model are as follows: compared with an air bag type expansion shaft, the mounting mode of the air bag type expansion shaft is reserved, and the defects of small expansion force, shutdown shaking and poor precision of the air bag type expansion shaft are avoided; compared with an external cylinder type mechanical expansion shaft, the advantages of high expansion precision and large expansion force are reserved, and a complex cylinder mounting mechanism is omitted.

Drawings

FIG. 1 is a schematic illustration of a mechanical expander disclosed in an embodiment of the present utility model;

fig. 2 is a schematic diagram of an expansion shaft body and a connection block according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of an internal structure of an expansion shaft body according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a mechanical expander disclosed in an embodiment of this utility model;

FIG. 5 is an enlarged schematic view of the area in FIG. 4A;

fig. 6 is an enlarged schematic view of the area of fig. 4B.

Identification description: the device comprises a 1-expansion shaft body, a 2-rotation main shaft, a 4-connecting block, a 5-expansion tile, a 6-expansion block, a 7-piston, an 8-expansion key, a 9-wedge block, a 10-wedge groove, an 11-O-shaped sealing ring, a 12-sealing ring, a 13-wear-resistant guide ring, a 14-rotary joint, a 15-base and a 16-spring.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "fixedly connected to" another element, it can be conventionally connected by welding or bolting or gluing.

Referring to fig. 1-6, a single air channel built-in cylinder type mechanical expansion shaft is disclosed in a preferred embodiment of the present utility model, and comprises an expansion shaft body 1, a rotating main shaft 2, an expansion mechanism and a reset mechanism; an expansion shaft cavity is formed in the expansion shaft body 1; the side surface of the expansion shaft body 1 is provided with an expansion port communicated with the expansion shaft cavity; the rotating main shaft 2 is arranged at the top of the expanding shaft main body 1, and a ventilation pipeline inside the rotating main shaft 2 is communicated with the expanding shaft cavity; the expansion mechanism comprises a connecting block 4, expansion tiles 5, expansion blocks 6, a piston 7 and expansion keys 8; the connecting block 4 is arranged in the expansion opening in a sliding manner; a wedge block 9 is arranged on one side of the connecting block 4; the inner side surface of the wedge-shaped block 9 gradually inclines inwards from top to bottom; the expansion tile 5 is arranged on one side of the connecting block 4, and the expansion tile 5 is arranged on the outer side of the expansion shaft body 1 in a wrapping mode; the expansion block 6 is movably arranged in the expansion shaft cavity; the piston 7 is arranged in the expansion shaft cavity in a sliding manner, and the piston 7 is arranged at the top of the expansion block 6; the piston 7 is positioned below an air outlet of an air duct in the rotating main shaft 2; the expansion key 8 is arranged on the side face of the expansion block 6; the side surface of the expansion key 8 is provided with a wedge groove 10 corresponding to the wedge block 9; the wedge-shaped block 9 is arranged in the wedge-shaped groove 10 in a sliding manner; the reset mechanism is arranged between the inner bottom wall of the expansion shaft cavity and the bottom of the expansion block 7.

Specifically, a sealing cavity is arranged in the expansion shaft body 1; the piston 8 is slidably disposed within the sealed chamber.

Specifically, the bottom of the rotating main shaft 2 is locked in the sealing cavity; an O-shaped sealing ring 11 is arranged between the outer side of the bottom of the rotating main shaft 2 and the side wall of the sealing cavity.

Specifically, a sealing ring 12 is arranged between the piston 8 and the sealing cavity.

In particular, a wear-resistant guide ring 13 is arranged between the piston 8 and the sealing chamber.

Specifically, the top of the rotating spindle 2 is provided with a rotary joint 14.

Specifically, the return mechanism includes a base 15 and a spring 16; the base 17 is arranged on the inner bottom wall of the expansion shaft cavity; limiting grooves are formed in the top of the base 17 and the bottom of the expansion block 7; the two ends of the spring 18 are respectively arranged in the two limiting grooves.

Working principle: the external compressed air enters the sealing cavity through the rotary joint 16 so as to push the piston 8, the expansion block 7 is pushed by the piston 8, so that the wedge-shaped sliding block 12 moves along the wedge-shaped groove 11, the connecting block 5 is pushed outwards along the expansion port, the expansion tile 6 is outwards expanded and tightly expanded on the inner wall of the material, and the material is fixed on the outer side of the expansion tile 6 and simultaneously rotates with the whole mechanical expansion shaft; when the materials are replaced, compressed air above the piston 8 is discharged, and the spring 18 automatically pushes the expansion block 7 and the piston 8 to reset, so that the expansion tile 6 is driven to restore to the original diameter, and the normal production requirement of mechanical equipment is met.

From the above description, the utility model has the advantages of simple structure, high expansion precision and large expansion force.

While the preferred embodiments of the present utility model have been described in detail in connection with the drawings of the specification, it should be noted that the scope of the present utility model includes but is not limited to the above embodiments; the specific structure disclosed in the drawings of the specification is also a preferred embodiment of the present utility model, and other embodiments can be developed on the basis of the above description by those skilled in the art, so that any simple modification or equivalent substitution without departing from the innovative concepts of the present utility model is encompassed by the present utility model, and falls within the scope of protection of the present utility model.

Claims

1. A single gas circuit embeds cylinder type machinery bulging axle, characterized by comprising:

an expansion shaft body; an expansion shaft cavity is arranged in the expansion shaft body; the side surface of the expansion shaft body is provided with an expansion port communicated with the expansion shaft cavity;

rotating the main shaft; the rotating main shaft is arranged at the top of the expanding shaft main body, and an air pipeline inside the rotating main shaft is communicated with the expanding shaft cavity;

an expansion mechanism; the expansion mechanism comprises a connecting block, an expansion tile, an expansion block, a piston and an expansion key; the connecting block is arranged in the expansion opening in a sliding manner; one side of the connecting block is provided with a wedge block; the inner side surface of the wedge block gradually inclines inwards from top to bottom; the expansion tile is arranged on one side of the connecting block, and the expansion tile is arranged on the outer side of the expansion shaft body in a packaged mode; the expansion block is movably arranged in the expansion shaft cavity; the piston is arranged in the expansion shaft cavity in a sliding manner, and the piston is arranged at the top of the expansion block; the piston is positioned below an air outlet of an air duct in the rotating main shaft; the expansion key is arranged on the side face of the expansion block; the side surface of the expansion key is provided with a wedge groove corresponding to the wedge block; the wedge-shaped block is arranged in the wedge-shaped groove in a sliding manner;

a reset mechanism; the reset mechanism is arranged between the inner bottom wall of the expansion shaft cavity and the bottom of the expansion block.

2. The single air path built-in cylinder type mechanical expansion shaft according to claim 1, wherein: a sealing cavity is arranged in the expansion shaft body; the piston is slidably disposed within the seal cavity.

3. A single air circuit built-in cylinder type mechanical expansion shaft according to claim 2, wherein: the bottom of the rotating main shaft is locked in the sealing cavity; an O-shaped sealing ring is arranged between the outer side of the bottom of the rotating main shaft and the side wall of the sealing cavity.

4. A single air circuit built-in cylinder type mechanical expansion shaft according to claim 2, wherein: and a sealing ring is arranged between the piston and the sealing cavity.

5. A single air circuit built-in cylinder type mechanical expansion shaft according to claim 2, wherein: and a wear-resistant guide ring is arranged between the piston and the sealing cavity.

6. The single air path built-in cylinder type mechanical expansion shaft according to claim 1, wherein: the top of the rotating main shaft is provided with a rotary joint.

7. The single air path built-in cylinder type mechanical expansion shaft according to claim 1, wherein: the reset mechanism comprises a base and a spring; the base is arranged on the inner bottom wall of the expansion shaft cavity; limiting grooves are formed in the top of the base and the bottom of the expansion block; the two ends of the spring are respectively arranged in the two limiting grooves.