Flatbed trolley with casters capable of not folding when handle rotates
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B62B-003/02
B62B-005/06
B60B-033/00
B62B-003/14
출원번호
US-0555015
(2015-11-27)
등록번호
US-10086860
(2018-10-02)
우선권정보
CN-2015 2 0952520 U (2015-11-26)
국제출원번호
PCT/CN2015/095843
(2015-11-27)
국제공개번호
WO2017/088183
(2017-06-01)
발명자
/ 주소
Jian, Shikun
출원인 / 주소
Jian, Shikun
대리인 / 주소
Davis, Malm & D'Agostine, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
The present invention discloses a flatbed trolley with casters capable of not folding when a handle rotates, which comprises a bearing frame (1), a handle (2), rotary frames (3), wheel carriers (4), and casters (5). The handle (2) is fixed at an upper portion of the bearing frame (1) via a connectin
The present invention discloses a flatbed trolley with casters capable of not folding when a handle rotates, which comprises a bearing frame (1), a handle (2), rotary frames (3), wheel carriers (4), and casters (5). The handle (2) is fixed at an upper portion of the bearing frame (1) via a connecting structure. The connecting structure comprises a left joint (14), a right joint (15), a left gear seat (12), a right gear seat (13), and a handle locking mechanism. The handle locking mechanism comprises a cross bar (7), locking blocks (8), connecting bars (9), switches (10), and a spring (11). The cross bar (7) is a hollow tube with an end being supported on the left gear seat (12) and the other end being supported on the right gear seat (13). An end of the cross bar (7) is provided with the locking block (8), wherein the locking block (8) is slidable along an extension direction of the cross bar (7). An end of the locking block (8) is connected to an end of the connecting bar (9), and the other end of the locking block is capable of inserting into the left joint (14) and the left gear seat (12) to lock them. The connecting bar (9) is installed within a hollow part of the cross bar (7), and the other end of the connecting bar is connected to the switch (10). Similarly, the other end of the cross bar (7) has a same structure. The spring (11) is provided between two switches (10), which thereby enables the casters be capable of not folding when the handle rotates.
대표청구항▼
1. A flatbed trolley with at least one caster capable of not folding when a handle rotates, comprising a bearing frame, the handle, at least one rotary frame, at least one wheel carrier, at least one caster, and a rear lock seat, wherein the caster is installed on the wheel carrier, the wheel carrie
1. A flatbed trolley with at least one caster capable of not folding when a handle rotates, comprising a bearing frame, the handle, at least one rotary frame, at least one wheel carrier, at least one caster, and a rear lock seat, wherein the caster is installed on the wheel carrier, the wheel carrier is fixed with the rotary frame, the rotary frame fits over an underframe tube provided at a bottom portion of the bearing frame and is capable of rotating relative to the underframe tube, the rear lock seat is disposed at a rear portion of the bearing frame and is capable of locking the rotary frame when the rotary frame rotates to a position perpendicular relative to the bearing frame, the handle is fixed at an upper portion of the bearing frame via a connecting structure, the connecting structure comprises a left joint, a right joint, a left gear seat, a right gear seat, and a handle locking mechanism, the left gear seat and the right gear seat are installed at both sides of the bearing frame respectively and are capable of rotating relative to the bearing frame and driving the rotary frame to rotate, an upper portion of the left joint is connected to a left vertical bar of the handle, a lower portion of the left joint is connected to the left gear seat and is capable of rotating relatively, an upper portion of the right joint is connected to a right vertical bar of the handle, a lower portion of the right joint is connected to the right gear seat and is capable of rotating relatively, and the handle locking mechanism is capable of locking the left joint and the right joint with the left gear seat and the right gear seat, respectively, so that they cannot rotate relatively, characterized in that, the handle locking mechanism comprises a cross bar, at least one locking block, at least one connecting bar, at least one switch, and a spring, the cross bar is a hollow tube with an end being supported on the left gear seat and the other end being supported on the right gear seat, the cross bar is provided with the locking block, wherein the locking block is slidable along an extension direction of the cross bar, an end of the locking block is connected to an end of the connecting bar, the other end of the locking block is capable of inserting into the left joint and the left gear seat to lock them, the connecting bar is installed within a hollow part of the cross bar, the other end of the connecting bar is connected to the switch; similarly, the other end of the cross bar is provided with the locking block, wherein the locking block is slidable along the extension direction of the cross bar, an end of the locking block is connected to an end of the connecting bar, the other end of the locking block is capable of inserting into the right joint and the right gear seat to lock them, the connecting bar is installed within the hollow part of the cross bar, the other end of the connecting bar is connected to the switch, and the spring is provided between two switches. 2. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 1, wherein the locking block comprises a connecting block, an upper lockpin, and a lower lockpin, wherein the connecting block is slidable along the hollow part of the cross bar, with an end of the connecting block being connected to the end of the connecting bar, the upper lockpin and the lower lockpin being arranged longitudinally symmetrical and parallel to each other, both the upper lockpin and the lower lockpin being connected to the connecting block via a vertical connecting portion. 3. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 2, wherein the connecting block is provided with a strip-type through-hole having a same direction as the cross bar, the connecting block being connected to the cross bar via a connecting rivet provided at an end portion of the cross bar, the connecting rivet passing through the strip-type through-hole, the end portion of the cross bar being further provided with a notch having a shape and a size matching the vertical connecting portion. 4. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 3, wherein the switch comprises a sliding block and a pick, the sliding block being mounted within the cross bar and slidable along the hollow part of the cross bar, with an end of the sliding block being connected to the end of the connecting bar, the cross bar being provided with a strip-type pilot hole having a same direction as the cross bar on a wall of the cross bar at a position corresponding to the sliding block, the pick being mounted outside the cross bar, the pick being connected to the sliding block via a first screw, the first screw passing through the strip-type pilot hole and being slidable along the strip-type pilot hole. 5. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 4, wherein the other end of the sliding block is provided with a protruding pillar for fixing the spring. 6. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 3, wherein the lower portion of the left joint is provided with a sleeve hole, an outer side of the left gear seat being correspondingly provided with a sleeve pillar, the sleeve hole provided at the lower portion of the left joint fitting over the sleeve pillar provided on the left gear seat, the sleeve pillar being a hollow cylinder provided with a through-hole, a second screw being placed into a side of the through-hole, a nut matching the second screw being placed into the other side of the through-hole to lock the left joint and the left gear seat in a horizontal direction. 7. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 6, wherein an inner side of the left gear seat is provided with a pair of spaced and symmetrical connecting pieces for supporting the cross bar on a same horizontal line as the sleeve pillar, the pair of connecting pieces being embeddable into the hollow part of the end portion of the cross bar and a distance between the pair of connecting pieces being sufficient for the connecting block to pass through, the connecting piece being further provided with a circular pilot hole for installing the connecting rivet. 8. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 7, wherein upper and lower edges of the connecting piece are provided with an inwardly facing lateral turnup, a space enclosed by the connecting piece and the lateral turnup being a guide-track groove, guiding blocks matching the guide-track groove being provided on two sides of the connecting block which correspond to the connecting piece. 9. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 8, wherein the left gear seat and the right gear seat are provided with limiting pieces, the limiting pieces being capable of limiting a maximum rotation angle of the left joint and the right joint as 90 degrees. 10. The flatbed trolley with the caster capable of not folding when the handle rotates according to claim 1, wherein the rotary frame is provided with a gear piece and a gear matching the gear seat, the gear seat being capable of driving the gear to drive the rotary frame to rotate when the gear seat rotates, the rotary frame on the same underframe tube being connected in series via a linkage bar, the linkage bar being provided with a locking hole at an end close to the gear seat, the rear lock seat being provided with a locking bolt corresponding to the locking hole; when the handle is unfolded, the gear seat drives the rotary frame to rotate, and the gear piece is capable of impacting the locking bolt to make the rear lock seat backwards; when the handle is unfolded to be perpendicular relative to the bearing frame, the locking bolt of the rear lock seat is capable of inserting into the locking hole of the linkage bar to lock the rotary frame.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (12)
Leimgruber John (4822 Seventh Ave. Temple PA 19560), Carriage device.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.