Material handling lift vehicle and suspension system for use therewith
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60G-003/12
B60G-003/00
출원번호
US-0933732
(2004-09-03)
등록번호
US-7267349
(2007-09-11)
발명자
/ 주소
Sica,Patsy L.
Beck,Jeremiah J.
출원인 / 주소
Beech Engineering & Manufacturing
대리인 / 주소
Sand & Sebolt
인용정보
피인용 횟수 :
4인용 특허 :
9
초록▼
A material handling lift for moving a load horizontally over a surface and vertically with respect to that surface and a suspension system for the material handling lift. The material handling lift includes a frame with wheels for traveling over the surface. At least one of the wheels is a drive whe
A material handling lift for moving a load horizontally over a surface and vertically with respect to that surface and a suspension system for the material handling lift. The material handling lift includes a frame with wheels for traveling over the surface. At least one of the wheels is a drive wheel mounted on a vertically-oriented steering column. The steering column is connected to the frame by a parallelogram type suspension system which includes swing arms that are pivotally connected to the frame. A stabilizer bar is connected between the free ends of the swing arms and a shock dampener is connected between the frame and a swing arm. The suspension system helps dampen the shock of traveling over uneven terrain, helps to keep the steering column vertical and the wheels of the vehicle on the ground thereby helping to maintain constant traction with the surface and control of the steering, braking and acceleration of the vehicle. Furthermore, the suspension system aids in providing constant steering effort for the vehicle, regardless of the weight of the load carried.
대표청구항▼
The invention claim is: 1. A material handling lift, for moving a load both horizontally across a surface and vertically relative to the surface, the lift comprising: a frame, wherein at least a portion thereof is adapted to receive the load thereon; an elongated steering column having a first end,
The invention claim is: 1. A material handling lift, for moving a load both horizontally across a surface and vertically relative to the surface, the lift comprising: a frame, wherein at least a portion thereof is adapted to receive the load thereon; an elongated steering column having a first end, a second end and a longitudinal axis extending therebetween; an axle mounted on the second end of the steering column and at right angles to the longitudinal axis thereof; a drive wheel rotatably received on the axle; whereby the drive wheel engages the surface; a pair of laterally spaced side wheels mounted on the frame for engaging the surface; a parallelogram suspension system for resiliently connecting the drive wheel to the frame; wherein the suspension system comprises: a pair of upper swing arms; a pair of lower swing arms; at least one stabilizer bar mounted between one of the pairs of upper swing arms and lower swing arms; a shock dampener connected to one of the pairs of upper and lower swing arms. 2. The material handling lift of claim 1, further comprising: a connector for fixedly connecting the stabilizer bar to the steering column. 3. The material handling lift of claim 2, wherein the upper and lower swing arms, steering column and the frame form a parallelogram of the parallelogram suspension. 4. The material handling lift of claim 3, in which the steering column is disposed between at least one of the pair of upper swing arms and lower swing arms. 5. The material handling lift of claim 4, in which the steering column is disposed between the frame and the stabilizer bar. 6. The material handling lift of claim 2, wherein the frame has a vertical wall and the parallelogram suspension system is mounted to the vertical wall. 7. The material handling lift of claim 6, in which the shock dampener is mounted to the vertical wall of the frame. 8. The material handling lift of claim 2, wherein the parallelogram suspension system is disposed between the first and second ends of the steering column. 9. The material handling lift of claim 2, wherein rotational movement of the suspension system causes vertical movement of the steering column. 10. The material handling lift of claim 8, further comprising a handle bar mounted on the first end of the steering column. 11. The material handling lift of claim 1, wherein each upper swing arm is vertically disposed above one of the lower swing arms. 12. The material handling lift as defined in claim 11, wherein the upper and lower swing arms are all of substantially the same length. 13. The material handling lift as defined in claim 1, wherein the stabilizer bar includes a pin extending therethrough and in which the pin has a pair of ends which are each received through an aperture in one of the upper and lower swing arms and are secured therein by a fastener. 14. The material handling lift as defined in claim 13, wherein the stabilizer bar further includes a bearing assembly disposed proximate each end of the pin, the bearing assembly adapted to allow the stabilizer bar to rotate about its longitudinal axis. 15. The material handling lift as defined in claim 14, wherein each end of the pin is threaded. 16. The material handling lift as defined in claim 14, wherein the stabilizer bar has ends that engage the one of the pairs of upper and lower swing arms; and in which each stabilizer bar end defines a shoulder therein and each bearing assembly is seated in one of the shoulders of the stabilizer bar. 17. The material handling lift as defined in claim 1, further comprising a second stabilizer bar mounted between the other of the pairs of upper and lower swing arms. 18. The material handling lift as defined in claim 17, wherein the second stabilizer bar includes a second pin extending therethrough and in which the second pin has a pair of ends which are each received through an aperture in the other of the upper and lower swing arms and are secured therein by a fastener. 19. The material handling lift as defined in claim 8, wherein the second stabilizer bar further includes ends that engage the other of the pairs of upper and lower swing arms and each second stabilizer bar end defines a second shoulder therein; and wherein the second stabilizer bar further includes a second bearing assembly disposed proximate each end of the second pin and each second bearing assembly is seated in one of the second shoulders of the second stabilizer bar. 20. The material handling lift as defined in claim 1, wherein a first end of the shock dampener is connected to a support bracket which extends outwardly from the frame. 21. The material handling lift as defined in claim 20, wherein each upper and lower swing arm has a first end and a second end; and each of the first ends of each of the upper and lower swing arms are connected to one of a pair of second support brackets which extend outwardly from the frame; and a second end of the shock dampener is connected to the second end of one of the upper and lower swing arms. 22. The material handling lift as defined in claim 21, further comprising a second shock dampener connected to the frame and to the second end of the other of the upper and lower swing arms. 23. The material handling lift of claim 2, wherein the connector comprises a plate fixedly connected to the steering column and to the stabilizer bar. 24. The material handling lift of claim 23, wherein an end of the plate for connection to the stabilizer bar is concave in shape and is complementary sized and shaped to engage with an outer surface of the stabilizer bar. 25. The material handling lift of claim 24, further comprising a housing coaxially received around the steering column and wherein the plate is fixedly connected between the housing and the stabilizer bar. 26. The material handling lift of claim 25, further comprising a second bearing assembly disposed at either end of the housing and lying between the housing and the steering column, wherein the second bearing assemblies allow for rotation of the housing about the steering column. 27. The material handling lift of claim 26, wherein the housing has an upper end and a lower end is secured to the steering column between a pair of collars, one of the collars engaging the upper end of the housing and the other collar engaging the lower end of the housing. 28. The material handling lift of claim 27, further comprising: a second stabilizer bar mounted between the other of the pairs of upper and lower swing arms; and a second connector for connecting the second stabilizer bar to the housing; wherein the longitudinal axis of the second stabilizer bar lies substantially at ninety degrees to the longitudinal axis of the steering column. 29. The material handling lift of claim 28, wherein the second connector comprises a second plate fixedly connected to the housing and to the second stabilizer bar and in which an end of the second plate for connecting to the second stabilizer bar is concave in shape and is complementary sized and shaped to engage an outer surface of the second stabilizer bar. 30. A material handling lift comprising: a frame; an elongated steering column; a drive wheel rotatably mounted on an end of the steering column and adapted to engage a ground surface over which the lift is to travel; a suspension system connecting the steering column to the frame; wherein said suspension system includes: a pair of aligned swing arms; each swing arm having a first end pivotably connected to the frame and a second end remote therefrom; a stabilizer bar pivotally mounted between the second ends of the swing arms, said stabilizer bar having an arcuate outer surface; at least one plate fixedly connected to the steering column and having an arcuate first end complementary shaped to engage the outer surface of the stabilizer bar; a shock dampener having a first end thereof connected to the frame and a second end thereof secured to one of the swing arms.
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이 특허에 인용된 특허 (9)
Raidel John E. (Rte. 9 ; Box 400-M Springfield MO 65804), Air ride suspension assemblies.
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