초록 ▼

A rear wheel steering hand cart with an integrated brake system includes a main body (10), a push handle (20), a wheel unit (30) and a wheel seat (50) which includes an upper wheel seat (53), a lower wheel seat (51) and a rotary shaft (52); a wheel stop device (40) is disposed between a real wheel (

A rear wheel steering hand cart with an integrated brake system includes a main body (10), a push handle (20), a wheel unit (30) and a wheel seat (50) which includes an upper wheel seat (53), a lower wheel seat (51) and a rotary shaft (52); a wheel stop device (40) is disposed between a real wheel (32) and the wheel seat (50); a clutch device (60) is arranged between the upper wheel seat (53) and the lower wheel seat (51), a control rod (71) of the clutch device (60) is connected to the wheel stop device (40), and the clutch device (60) includes the first clutch element (61) and the second clutch element (63).

대표청구항 ▼

1. A rear wheel steering hand cart with an integrated brake system, comprising: a main body (10);a push handle (20), disposed on one end of the main body (10);a wheel unit (30) disposed under the main body (10), including at least three wheels arranged in two rows, a rear wheel (32) of the wheel uni

1. A rear wheel steering hand cart with an integrated brake system, comprising: a main body (10);a push handle (20), disposed on one end of the main body (10);a wheel unit (30) disposed under the main body (10), including at least three wheels arranged in two rows, a rear wheel (32) of the wheel unit (30) disposed on one end of the push handle (20) connected to main body (10) by a wheel seat (50);the wheel seat (50) including an upper wheel seat (53) disposed on the main body (10) and a lower wheel (51) connecting to a wheel axle (33), the upper wheel seat (53) and the lower wheel (51) connecting to each other by a rotary shaft (52);a wheel stop device (40) disposed between the real wheels (32) and the wheel seat (50);wherein further comprising a clutch device (60) disposed between the upper wheel seat (53) and the lower wheel seat (51), comprises:a first clutch element (61) covered the rotary shaft (52), radial position connected to the upper wheel seat (53);a second clutch element (63), covered the rotary shaft (52), radial position connected to the lower wheel seat (51), anda clutch device control division, controlling the separation and close of the first clutch element (61) and the second clutch element (63). 2. The rear wheel steering hand cart with an integrated brake system as claimed in claim 1, wherein the clutch device control division connects to the wheel stop device (40) for controlling locking and unlocking of the wheel stop device (40). 3. The rear wheel steering hand cart with an integrated brake system as claimed in claim 1, wherein the clutch device control division is a control rod (71) parallel to the rotary shaft (52), and being glided between the upper wheel seat (53) and the lower wheel seat (51), the first clutch element (61) fixedly connects to the upper end of the control rod (71), and the second clutch element (63) is disposed on the lower end of the control rod (71) and fixedly connects to the lower wheel seat (51); the clutch device control division further comprises a control holder (72), one end of the control holder (72) is hinged to the upper wheel seat (53), and the middle part of the control holder (72) connects to the control rod (71). 4. The rear wheel steering hand cart with an integrated brake system as claimed in claim 3, wherein further comprises a restoring spring (56) disposed between the first clutch element (61) and the lower wheel seat (51). 5. The rear wheel steering hand cart with an integrated brake system as claimed in claim 3, wherein the second clutch element (63) is a two-V-shape open grooves (631), the two-V-shape open grooves (631) connects to each other; the first clutch element (61) is a bump (611), and two intro bevels are disposed at two covers of the bump (611). 6. The rear wheel steering hand cart with an integrated brake system as claimed in claim 3, wherein the second clutch element (63) is a first tooth flank (632), and the shape of the upper end of the first tooth flank (632) is smaller than it of the bottom end of the first tooth flank (632); the first clutch element (61) is a second tooth flank (612) meshing with the first tooth flank (632). 7. The rear wheel steering hand cart with an integrated brake system as claimed in claim 6, wherein the shapes of the first tooth flank (632) and the second tooth flank (612) are triangle, involute, arc, or acumination cusp. 8. The rear wheel steering hand cart with an integrated brake system as claimed in claim 3, wherein the second clutch element (63) is multi shrinkage pools (633) disposed on a radial line, each of the multi shrinkage pools (633) comprises a V-shape expansion open connecting to each other by their edges, and the first clutch element (61) is a convex cylinder (613) corresponding to the shrinkage pool (633). 9. The rear wheel steering hand cart with an integrated brake system as claimed in claim 8, wherein the convex cylinder (613) has a cup head or a pointed end. 10. The rear wheel steering hand cart with an integrated brake system as claimed in claim 1, wherein the clutch device control division is a first pull component (73), which comprises a first pull sheath (731) and a first pull (732) glided along the inside of the first pull sheath (731); one end of the first pull (732) connects to a first brake handle (733) of the push handle (20), another end of the first pull (732) connects to the rotary shaft (52) or the wheel seat (51); one end of the first pull sheath (731) connects to a first brake rack (734), another end of the first pull sheath (731) connects to the first clutch element (61). 11. The rear wheel steering hand cart with an integrated brake system as claimed in claim 10, wherein the first clutch element (61) has a T-shape groove (614); a step sleeve (735) is disposed on a coupling end of the first pull sheath (731) and the first clutch element (61), the step sleeve (735) is embedded in the T-shape groove (614). 12. The rear wheel steering hand cart with an integrated brake system as claimed in claim 1, wherein the first clutch element (61) is fixed on the upper wheel seat (53), and the second clutch element (63) is glided up and down along the rotary shaft (52). 13. The rear wheel steering hand cart with an integrated brake system as claimed in claim 12, wherein the clutch device control division is a second pull component (74), which comprises a second pull sheath (741) and a second pull (742) glided along the inside of the second pull sheath (741); one end of the second pull (742) connects to a second brake handle (743) of the push handle (20), another end of the second pull (742) connects to the wheel stop device (40) and the second clutch element (63); one end of the first pull sheath (731) connects to a first brake rack (734), another end of the first pull sheath (731) is fixed to the first clutch element (61). 14. The rear wheel steering hand cart with an integrated brake system as claimed in claim 1, wherein the wheel stop device (40) comprises a tooth block (41) disposed on wheels, middle part of the tooth block (41) is hinged to a deflector rod (42) of the lower wheel seat (51), a fixture block (421) disposed on the head end of the deflector rod (42) is embedded into the tooth block (41), the rear end of the deflector rod (42) connects to the clutch device control division.