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CN-122014850-A - Parking and gear shifting interlocking safety mechanism for tractor

CN122014850ACN 122014850 ACN122014850 ACN 122014850ACN-122014850-A

Abstract

The invention discloses a parking and gear shifting interlocking safety mechanism for a tractor, and belongs to the field of design of gearboxes of tractors. The mechanism comprises a shaft assembly, a first gear shifting shaft, a second gear shifting shaft, a locking plate and a locking plate, wherein the middle part of the locking plate is hinged to the first gear shifting shaft, one end of the locking plate is connected with the second gear shifting shaft in a sliding manner through a stirring notch, the other end of the locking plate is provided with a through notch, and the locking plate is fixedly connected to a swing arm of the shaft assembly and is provided with an arc-shaped strip coaxial with the shaft assembly. The invention utilizes the mechanical interference principle of the swing of the lock plate and the arc movement of the lock plate, namely, only when the gear shifting shaft is in neutral gear, the gear shifting shaft is opposite to the lock plate through the notch, the parking operation is allowed to be executed, the lock plate penetrates through the notch to lock the gear shifting shaft after parking, and the gear shifting shaft cannot be in gear shifting, and when the gear shifting shaft is in gear shifting, the side wall of the lock plate blocks the movement path of the lock plate, so that the gear shifting shaft is prevented from entering a parking state. The interlocking function of parking and gear shifting is realized through pure mechanical structure linkage, and the problem of gear rattle or damage of a gearbox gear caused by misoperation is effectively avoided.

Inventors

  • ZHAO YU
  • LIU WENLI
  • ZHOU XUEHU
  • ZHOU MEIFANG
  • JIA HAO
  • LIU YINGYU

Assignees

  • 中农北极星(天津)智能农机装备有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (6)

  1. 1. The utility model provides a parking for tractor with interlock safety mechanism that shifts, includes to rotate axle assembly (3) of installing on gearbox box (1) to and respectively slidable mounting is first (20) and second (21) of shifting on gearbox box (1), the axial lead of axle assembly (3) and the axial lead mutually perpendicular of first (20) and second (21) of shifting, its characterized in that still includes: the gear shifting device comprises a gear shifting shaft I (20), a gear shifting shaft II (21), a gear shifting plate (19), a gear shifting shaft II (21) and a gear shifting shaft II, wherein a hinge hole (190) is formed in the middle of a plate body of the gear shifting plate (19), a through notch (191) and a shifting notch (192) are formed in two ends of the plate body respectively, the gear shifting plate (19) is hinged with the gear shifting shaft I (20) through a first fastener through the hinge hole (190), a second fastener is fixedly connected to the gear shifting shaft II (21), and the second fastener is arranged in the shifting notch (192) in a penetrating mode and is connected with the gear shifting shaft II (21) in a sliding mode, so that the gear shifting shaft I (20) and the gear shifting shaft II (21) can be shifted to rotate around the first fastener when the gear shifting shaft II relatively displaces; The locking plate (32), the locking plate (32) is fixedly connected to a swing arm (31) connected with the shaft assembly (3), the locking plate (32) is provided with a section of arc-shaped strip (321), and the axial lead of the arc-shaped body of the arc-shaped strip (321) and the shaft assembly (3) are coaxially arranged; When the first gear shifting shaft (20) and the second gear shifting shaft (21) are in a neutral position, the through notch (191) is opposite to the movement path of the arc-shaped strip (321), the shaft assembly (3) is allowed to rotate to drive the locking plate (32) to pass through the through notch (191) so as to enter a parking state, when the locking plate (32) passes through the through notch (191), the arc-shaped strip (321) and the through notch (191) form blocking fit to limit the rotation of the locking plate (19), so that the axial displacement of the first gear shifting shaft (20) and the second gear shifting shaft (21) is locked, and when the first gear shifting shaft (20) or the second gear shifting shaft (21) is in a gear engaging position, the side wall of the end of the locking plate (19) where the through notch (191) is located forms a blocking limit for the locking plate (32) so as to limit the rotation of the shaft assembly (3) in the parking direction.
  2. 2. The parking and gear shifting interlocking safety mechanism for a tractor according to claim 1, wherein the main body of the locking plate (32) is the arc-shaped strip (321), and the left end and the right end of the arc-shaped strip (321) are fixedly connected with the swing arm (31) through a left end connecting part (323) and a right end connecting part (322) respectively.
  3. 3. The parking and gearshift interlock safety mechanism for a tractor according to claim 2, wherein when the first gearshift shaft (20) or the second gearshift shaft (21) is in the engaged position, the end side wall of the lock plate (19) where the through slot (191) is located forms a stop limit for the right end coupling portion (322) of the lock plate (32).
  4. 4. The safety mechanism of a parking and gearshift interlock for a tractor according to claim 1, wherein the first fastener is a first bolt (22) and the second fastener is a second bolt (23).
  5. 5. The parking and gear shifting interlocking safety mechanism for a tractor according to claim 1, wherein the first gear shifting shaft (20) synchronously drives the first shifting fork (25), and the second gear shifting shaft (21) synchronously drives the second shifting fork (24).
  6. 6. A parking and gearshift interlock safety mechanism for a tractor according to claim 1, characterized in that the lock plate (19) is axially displaced from the lock plate (32) as a whole when the shaft assembly (3) is in a non-parking state, to release the restriction of displacement of the first gearshift shaft (20) and the second gearshift shaft (21).

Description

Parking and gear shifting interlocking safety mechanism for tractor Technical Field The invention belongs to the field of tractor gearbox design, and particularly relates to a parking and gear shifting interlocking safety mechanism for a tractor, which realizes the functions of parking and gear shifting of the parking and gear shifting interlocking safety mechanism. Background At present, a gear locking parking structure and a gear shifting structure in a tractor gearbox are mutually independent, and a linkage control mechanism is lacked. The following problems exist in practical use: the driver mistakenly hangs a driving gear in a parking state, so that a gear is damaged; the driver can mistakenly hang the parking gear in the driving state, so that the phenomenon of tooth hitting occurs, and the gear is damaged. Disclosure of Invention The invention aims to provide a parking and gear shifting interlocking safety mechanism for a tractor, which realizes the interlocking function of parking and gear shifting, and the technical scheme is as follows: The utility model provides a parking for tractor with interlock safety mechanism that shifts, is including rotating the axle assembly of installing on the gearbox box to and the first and second of shifting of slidable mounting on the gearbox box respectively, the axial lead of axle assembly and the axial lead mutually perpendicular of first and second of shifting still include: The locking plate is hinged with the first gear shifting shaft through a first fastener penetrating through the hinge hole, and a second fastener penetrating through the stirring notch and being in sliding connection with the stirring notch is fixedly connected to the second gear shifting shaft, so that the first gear shifting shaft and the second gear shifting shaft can be stirred to rotate around the first fastener when relatively displacing; The locking plate is fixedly connected to the swing arm connected with the shaft assembly and is provided with a section of arc-shaped strip, and the axial lead of the arc-shaped body of the arc-shaped strip and the shaft assembly are coaxially arranged; When the first gear shifting shaft and the second gear shifting shaft are in a neutral position, the through notch is opposite to the movement path of the arc-shaped strip, the shaft assembly is allowed to rotate to drive the locking plate to pass through the through notch to enter a parking state, when the locking plate passes through the through notch, the arc-shaped strip and the through notch form blocking fit to limit the rotation of the locking plate, so that the axial displacement of the first gear shifting shaft and the second gear shifting shaft is locked, and when the first gear shifting shaft or the second gear shifting shaft is in a gear engaging position, the side wall of the end of the through notch of the locking plate forms a blocking limit for the locking plate to limit the rotation of the shaft assembly in the parking direction. Further, the main body of the locking plate is the arc-shaped strip, and the left end and the right end of the arc-shaped strip are fixedly connected with the swing arm through a left end connecting part and a right end connecting part respectively. Further, when the first shift shaft or the second shift shaft is in a gear-engaged position, the side wall of the end of the lock plate, where the through notch is located, forms a resisting limit for the right end connecting part of the lock plate. Further, the first fastening piece is a first bolt, and the second fastening piece is a second bolt. Further, the shifting shaft synchronously drives the shifting fork I, and the shifting shaft II synchronously drives the shifting fork II. Further, when the shaft assembly is in a non-parking state, the lock plate is axially staggered from the lock plate as a whole so as to release the limitation of the displacement of the first shift shaft and the second shift shaft. The invention has the function of preventing misoperation and can effectively avoid the problem of gear damage caused by the gear engaging driving in the parking state or the misoperation of the driving state. Drawings The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and to enable a person skilled in the pertinent art to make and use the invention. FIG. 1 is a schematic diagram of the overall structure of the present invention; FIG. 2 is a schematic illustration of an embodiment of a shaft assembly control mechanism as viewed from the exterior of the transmission; FIG. 3 is an exploded view of an embodiment of a steering mechanism for parking associated with the axle assembly; FIG. 4 is a block diagram of a shaft assembly and locking plate combination; FIG. 5 is a bloc