Bicycle frame and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10472016-B2
Application number	US-201715728765-A
Country	US
Kind code	B2
Filing date	Oct 10, 2017
Priority date	Jun 1, 2017
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

The present disclosure provides a bicycle frame including: a main frame; a support bracket formed separately from the main frame and bonded to a lower end portion of the main frame, and a motor mounting having a motor mounting portion configured to mount a motor therein, wherein the motor mounting bracket is formed separately from the support bracket, and is bonded to the support bracket.

First claim

What is claimed is:

1. A bicycle frame comprising:
a main frame;
a support bracket, wherein the support bracket is formed separately from the main frame and is bonded to a lower end portion of the main frame; and
a motor mounting bracket having a motor mounting portion configured to mount a motor therein, wherein the motor mounting bracket is formed separately from the support bracket and is bonded to the support bracket,
wherein the main frame is formed by bonding a pair of side panels in a predetermined shape through stamping,
wherein the main frame comprises a plurality of tube bodies, and an insertion hole is formed at a lower end portion of the tube body,
wherein the support bracket comprises an insertion portion that is capable of inserting into the insertion hole of the tube body and bonded along a circumference of the insertion hole,
wherein a welding groove is configured to form in the insertion portion of the support bracket along a circumference of the support bracket and to weld to an entry of the insertion hole of the tube body, and
wherein a predetermined gap is formed between an inner circumference of the insertion hole and an outer circumference of the insertion portion.

2. The bicycle frame of claim 1 , wherein:
the support bracket and the motor mounting bracket are bonded to each other and are provided as a sub frame corresponding to a specification and a shape of the motor.

3. The bicycle frame of claim 2 , wherein:
the sub frame is bonded to the lower end portion of the main frame through the support bracket.

4. The bicycle frame of claim 1 , wherein:
the motor mounting bracket is bonded along an inner surface of the support bracket.

5. The bicycle frame of claim 1 , wherein:
a bent portion is formed in the tube body and the bent portion is bent to the center portion of the insertion hole at the entry of the insertion hole.

6. A manufacturing method of a bicycle frame comprising the steps of:
(a) providing a main frame, wherein the main frame forms a plurality of tube bodies and has an insertion hole at a lower end portion of the tube body;
(b) providing a support bracket, wherein the support bracket comprises an insertion portion that is capable of inserting into the insertion hole of the main frame;
(c) providing a motor mounting bracket having a motor mounting portion configured to mount a motor therein;
(d) bonding the support bracket and the motor mounting bracket; and
(e) inserting the insertion portion of the support bracket into the insertion hole of the main frame and bonding the entry of the insertion hole and the insertion portion,
wherein the step (b) comprises forming a welding groove in the insertion portion of the support bracket along a circumference of the support bracket, and
wherein the step (e) comprises forming a predetermined gap between an inner circumference of the insertion hole and an outer circumference of the insertion portion, and bonding an entry of the insertion hole of the tube body and the welding groove.

7. The manufacturing method of claim 6 , wherein the step (d) comprises:
providing a sub frame, wherein the sub frame is formed by bonding the support bracket and the motor mounting bracket and corresponds to a specification and a shape of the motor.

8. The manufacturing method of claim 6 , further comprising:
in the step (c), forming a joining end portion at an upper end portion of the motor mounting bracket; and
in the step (d), bonding the joining end portion of the motor mounting bracket to an inner surface of the support bracket.

9. The manufacturing method of claim 7 , wherein the step (e) comprises:
bonding the sub frame to a lower end portion of the main frame through the support bracket.

10. The manufacturing method of claim 6 , wherein the step (e) comprises:
forming a bent portion bent at the central direction of the insertion hole at the entrance end portion of the insertion hole; and
bonding the entry of the insertion hole of the tube body and the welding groove.

11. The manufacturing method of claim 6 , wherein the step (a) comprises:
forming a plurality of tube bodies by bonding a pair of side panels in a predetermined shape through stamping.

12. The manufacturing method of claim 11 further comprising:
in the step (a), forming a first joining portion in the main frame by bonding the both side panels;
in the step (d), forming a second joining portion in the sub frame by bonding the support bracket and the mounting bracket; and
in the step (e), forming a third joining portion by bonding a lower end portion of the tube body and the support bracket of the sub frame.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Choi Jungnam
• Lim Sung Dae

Classifications

• B62K19/20

  welded, soldered, or brazed · CPC title

• B23K2101/06

  Tubes · CPC title

• B62M6/55

  power-driven at crank shafts parts · CPC title

• B23K2101/006

  Vehicles · CPC title

• B62K19/34 Primary

  Bottom brackets · CPC title