CN113145775B

CN113145775B - Forming device for bicycle cushion spring

Info

Publication number: CN113145775B
Application number: CN202110406603.1A
Authority: CN
Inventors: 龚雅萍; 王帅军; 淦学甄; 陈甜
Original assignee: Zhejiang Ocean University ZJOU
Current assignee: Zhejiang Ocean University ZJOU
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2022-08-23
Anticipated expiration: 2041-04-15
Also published as: CN113145775A

Abstract

A forming device for a bicycle saddle spring comprises a base, wherein a semicircular track is processed on the base, lower dies are positioned above the base and are bilaterally symmetrical, the two lower dies are movably connected in the middle through a hinge shaft, each lower die comprises a boss embedded into the semicircular track and a forming cavity for forming the saddle spring, one end of a hinge cylinder is hinged to the side of the corresponding lower die, an upper die is positioned right above the corresponding lower die, the middle of the upper die is connected with a stamping block through a gas spring, two sides of the upper die are fixedly connected with stamping blocks I, the lower surfaces of the stamping blocks are lower than those of the stamping blocks I, and semicircular grooves are processed on the lower parts of the stamping blocks and the stamping blocks I; the stamping and bending processes in the forming process of the car cushion spring are combined and completed by the same equipment, the machining precision is improved, the working efficiency is improved, meanwhile, the process of manual operation transfer is omitted, the manpower capital is saved, the labor of workers is reduced, and the method has certain significance in transformation and upgrading of enterprises.

Description

Forming device for bicycle cushion spring

Technical Field

The invention relates to a forming device for a bicycle cushion spring.

Background

The cushion spring is commonly used for supporting a bicycle seat cushion, a common cushion spring for a bicycle in a production workshop is shown in fig. 4 and 5, the existing workshop processing of the cushion spring generally comprises two procedures of stamping and bending, the two procedures are respectively completed by two devices, the problems of transfer and positioning between the two devices cause the discount of part precision, and the existing processing technology is basically that the cushion spring is firstly bent in the middle and then formed at two sides simultaneously, so that the reference is inaccurate, and the processing error is larger. Meanwhile, each part needs to be processed on two devices respectively, so that the process is multiple and the labor intensity is high.

Disclosure of Invention

Aiming at the defects in the problems, the invention provides a forming device of a bicycle saddle spring.

To achieve the above objects, the present invention provides a device for forming a bicycle cushion spring, comprising:

the base is provided with a semicircular track;

the lower dies are positioned above the base and are bilaterally symmetrical, the two lower dies are movably connected in the middle through a hinge shaft, and each lower die comprises a boss embedded into the semicircular track and a forming cavity for forming a car cushion spring;

one end of the hinge cylinder is hinged to the base, and the other end of the hinge cylinder is hinged to the side of the lower die;

the upper die is located right above the lower die, the middle of the upper die is connected with the stamping block through the gas spring, two sides of the upper die are fixedly connected with the stamping block I, the lower surface of the stamping block is lower than the stamping block I, and the stamping block reaches the lower part of the stamping block I is processed with a semicircular groove.

As a further improvement of the invention, the shape of the forming cavity is matched with the side frame of the car cushion spring.

As a further improvement of the invention, the semicircular groove is matched with the size of the car cushion spring.

As a further improvement of the invention, after the hinge cylinder reaches the maximum stroke, the included angle between the two lower dies is 30 degrees.

As a further improvement of the present invention, when the gas spring is expanded to the limit, the lower portions of the punch block and the punch block I are kept flat.

The invention has the beneficial effects that:

the punching press in the forming process of car pad spring and the twice process of bending are merged, and are accomplished by same equipment, and the machining precision improves, and work efficiency improves, simultaneously, has saved the process that manual operation shifted, practices thrift manpower capital, reduces workman's work, and to the transformation upgrade of enterprise have certain meaning, more traditional bending earlier the back shaping, easy location, the precision of processing is high.

Drawings

FIG. 1 is a front elevational view (in partial section) of a bicycle cushion spring forming apparatus in accordance with the present invention;

FIG. 2 is a side view of the upper die of FIG. 1;

FIG. 3 is a top plan view (at the lower die) of a bicycle cushion spring forming apparatus of the present invention;

FIG. 4 is a front view of the vehicle cushion spring;

FIG. 5 is a view taken along line A of FIG. 4;

fig. 6 is a schematic view of the cushion spring before bending.

In the figure: 1. a base; 11. a semicircular track; 2. a lower die; 21. a boss portion; 22. a molding cavity; 3. a hinge axis; 4. a vehicle cushion spring; 41. bending the part; 42. a side frame; 5. a hinge cylinder; 6. stamping a block I; 7. stamping the blocks; 8. a gas spring; 9. and (5) an upper die.

Detailed Description

As shown in fig. 1 and 3, the device for forming a bicycle saddle spring according to the embodiment of the present invention comprises a base 1, wherein a semicircular track 11 is formed on the base 1; the lower dies 2 are positioned above the base 1 and are bilaterally symmetrical, the two lower dies 2 are movably connected in the middle through a hinge shaft 3, each lower die 2 comprises a boss 21 embedded into the semicircular track 11 and a forming cavity 22 for forming the car cushion spring 4, and the shape of the forming cavity 22 is matched with a side frame 42 of the car cushion spring 4; one end of the hinge cylinder 5 is hinged to the base 1, the other end of the hinge cylinder is hinged to the side part of the lower die 2, and after the hinge cylinder 5 reaches the maximum stroke, the included angle between the two lower dies 2 is 30 degrees; go up mould 9 and be located directly over lower mould 2, go up mould 9 middle part and pass through gas spring 8 and connect punching press piece 7, go up the both sides fixed connection punching press piece I6 of mould 9, the lower surface of punching press piece 7 is less than punching press piece I6, and the lower part processing of punching press piece 7 and punching press piece I6 has the half slot, and the size and the car pad spring 4 of half slot match, and when gas spring 8 stretched out and draws back to the limit, punching press piece 7 and punching press piece I6 lower part were kept level.

In particular use, the invention will be described with reference to the accompanying drawings for ease of understanding;

in the initial state, the two lower dies are positioned on the same straight line, a linear steel wire with a specific length is placed in a forming cavity of the lower dies (the length of the forming cavity is consistent with the length of the steel wire), the upper die is moved downwards, the stamping block is contacted with the steel wire firstly, the steel wire shrinks and deforms in the forming cavity, when the middle part of the steel wire is basically formed, the stamping block I is contacted with the deformed steel wire, meanwhile, the gas spring contracts to the limit, the bottoms of the stamping block and the stamping block I are kept flat, the steel wire is stamped and formed under the combined action of the semicircular grooves of the stamping block and the stamping block I and the forming cavity of the lower die, the formed condition is shown in figure 6, and then, the upper die is reset, the hinge cylinder acts to enable the two lower dies to deflect around the hinge shaft (each deflection is 75 degrees), the steel wire deflects along with the lower dies to obtain the formed car cushion spring, the position of the hinge shaft is a bending part 41, and the two lower dies correspond to a side frame 42 with an included angle of 30 degrees.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for forming a bicycle cushion spring, comprising:

the device comprises a base (1), wherein a semicircular track (11) is machined on the base (1);

the lower dies (2) are positioned above the base (1) and are bilaterally symmetrical, the two lower dies (2) are movably connected in the middle through a hinge shaft (3), and each lower die (2) comprises a boss (21) embedded into the semicircular track (11) and a forming cavity (22) for forming the car cushion spring (4);

one end of the hinge cylinder (5) is hinged to the base (1), and the other end of the hinge cylinder (5) is hinged to the side of the lower die (2);

go up mould (9), it is located to go up mould (9) directly over lower mould (2), go up mould (9) middle part and connect punching press piece (7) through gas spring (8), go up the both sides fixed connection punching press piece of mould (9)

(6) The lower surface of the punch block (7) is lower than the punch block

(6) And the punch block (7) and the punch block

(6) The lower part of the lower part is provided with a semicircular groove;

in the initial state, the two lower dies are in the same straight line, the linear steel wire with specific length is placed in the forming cavity of the lower dies, the upper die is downward, the stamping block is in contact with the steel wire before the steel wire, the steel wire contracts and deforms in the forming cavity, and when the middle part of the steel wire is basically formed, the stamping block

Contact with deformed steel wire, while the gas spring is contracted to the limit, and the punch block and punch block

The bottom is kept flat, and the combined action of the semicircular grooves of the two and the forming cavity of the lower die enables the steel wire to be punched and formed, then the upper die is reset, the hinge cylinder acts to enable the two lower dies to deflect around the hinge shaft, and the steel wire moves along with the deflection of the lower dies to obtain the formed car cushion spring.

2. The apparatus for forming a bicycle cushion spring as in claim 1, wherein: the shape of the molding cavity (22) is matched with the side frame (42) of the car cushion spring (4).

3. The apparatus for forming a bicycle cushion spring as in claim 1, wherein: the size of the semicircular groove is matched with that of the car cushion spring (4).

4. The apparatus for forming a bicycle cushion spring as in claim 1, wherein: after the hinge cylinder (5) reaches the maximum stroke, the included angle between the two lower dies (2) is 30 degrees.

5. The apparatus for forming a bicycle cushion spring as in claim 1, wherein: when the gas spring (8) stretches to the limit, the stamping block (7) and the stamping block

(6) The lower part is kept flat.