CN208778636U - A kind of Gears for Motorcycle pawl structures - Google Patents

Abstract

The utility model discloses a kind of Gears for Motorcycle pawl structures, including gear and pawl, the end face of gear is equipped with pawl, pawl is evenly spaced distribution along the circumferential direction of gear, the side of pawl is machined out, pawl side and gear face is set to form back taper, when axial two gear pawls combine, the two basic change side of pawl is back taper, positive pressure is not only generated between two junction but also produces the axial tension for being directed toward gear face respectively, axial tension makes two gears produce the trend moved toward one another, it can make to be axially moved gear rapidly in place in shift process.The utility model avoid as part manufacturing tolerance is big or shift part not completely into shelves and caused by gear half hitch conjunction state so that torsion pass gear with free gear in conjunction with reliably and completely in place；Meanwhile the axial tension between pawl has also shared the axial force of a part of fixed gear, reduces the axial shearing force of the parts such as shift fork, drum, improves the safety in utilization of part.

Description

A kind of Gears for Motorcycle pawl structures

Technical field

The utility model relates to motorcycle engine accessory more particularly to a kind of Gears for Motorcycle pawl structures.

Background technique

The manual shifting gear pair of motorcycle is that long-term meshing state, a portion gear and axis pass through interference fit or flower The modes such as key carry out torque transmitting, and then empty set can not transmit torque on transmission shaft to another part gear between transmission shaft, and It is to be attached between adjacent gear by the connection types such as pawl-groove or pawl-pawl when in use, then pass through torsion pass tooth Wheel to carry out torque transmitting indirectly.When manipulating motorcycle gear-shifting axis, shift drum rotates, and snakelike groove pushes shift Shift fork carries out axial displacement, to push adjacent gear in conjunction with the pawl-groove or pawl-pawl between gear or take off From the switching of progress engine different drive ratios, to realize the rotation speed change of engine.

Since shifting gear end face pawl is of less demanding to fit tolerance, for convenience of manufacturing, the spine on ordinary gear Pawl generally uses direct forging molding, subsequent to be no longer machined out.When free gear and torsion pass gear by pawl-groove or After pawl-pawl combines, the fixation of gear axial position fully relies on limit plate and fixed plate on shift fork, drum and drum Effect, each part generates certain lateral shearing force；Do not have during each section part manufacturing tolerance is larger or shift When having completely into shelves, then gear pawl may occur and combine not exclusively, so that it is scarce to cause pawl head to be collapsed, while gear teeth face It not exclusively will cause torsion pass failure in conjunction with length.

Utility model content

Purpose of utility model: the utility model aim is to provide a kind of binding force that can reinforce between gear and gear, subtracts The shearing force of the parts such as few shift fork, drum, make gear combined during shift more efficiently with the new gear pawl of fastening Structure.

Technical solution: the utility model includes gear and pawl, and the end face of the gear is equipped with pawl, the pawl edge The circumferential direction of gear is evenly spaced distribution, and the side of the pawl and gear face form back taper, the pawl and spine Blade tooth wheel combines, and the pawl two basic change face in conjunction with pawl gear is back taper.

When two axial gears pawls combine, the two basic change side of pawl is back taper, and pawl two combines Positive pressure is not only generated between face but also produces the axial tension for being directed toward gear face respectively.

The axial tension makes two gears produce the trend moved toward one another, and axial fortune can be made in shift process Moving gear rapidly in place, avoid as part manufacturing tolerance is big or shift part not completely into shelves and caused by gear quasi integration State, so that torsion pass gear is reliable in conjunction with free gear and completely in place.

The back taper angle that the pawl side and gear face are formed is 87 °.

The pawl uses forging molding, and increases the machining to pawl side on the basis of original forging stock.

Working principle: after axial two gear pawls combine, since the two basic change side of pawl is back taper, two Positive pressure is not only generated between faying face but also produces the axial tension for being directed toward gear face respectively.Axial tension makes two Gear produces the trend moved toward one another, can make to be axially moved gear rapidly in place in shift process.

The utility model has the advantages that the gear pawl of the utility model can make to be axially moved gear rapidly in place in shift process, Avoid as part manufacturing tolerance is big or shift part not completely into shelves and caused by gear half hitch conjunction state so that torsion pass tooth Wheel with free gear in conjunction with reliably and completely in place；Meanwhile the axial tension between pawl has also shared a part of fixed gear Axial force reduces the axial shearing force of the parts such as shift fork, drum, improves the safety in utilization of part.

Detailed description of the invention

Fig. 1 is the gear schematic diagram with pawl of the utility model；

Fig. 2 is the gear top view with pawl of the utility model；

Fig. 3 is A-A cross-sectional view shown in Fig. 2；

Fig. 4 is the schematic diagram after the pawl-pawl gear of the utility model combines.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing.

As shown in Figure 1 to Figure 3, the utility model includes gear 1 and pawl 2, and the end face of gear 1 is equipped with pawl 2, pawl 2 Distribution is evenly spaced along the circumferential direction of gear.Pawl 2 uses forging molding, and increases on the basis of original forging stock to spine The machining of 2 side of pawl makes 2 side of pawl and 1 end face of gear form the back taper of 87 ° of angles, as shown in figure 3, to make axial direction When two gear pawls combine, the two basic change side of pawl 2 is back taper.

Schematic diagram after pawl is illustrated in figure 4 in conjunction with pawl gear, since the two basic change side of pawl is down Cone, therefore not only generate positive pressure between two junction but also produce the axial tension for being directed toward gear face respectively.It is axial to draw Power makes two gears produce the trend moved toward one another, can make to be axially moved gear rapidly in place in shift process, keep away Exempted from as part manufacturing tolerance is big or shift part not completely into shelves and caused by gear half hitch conjunction state so that torsion pass gear It is reliable and completely in place in conjunction with free gear.Meanwhile the axial tension between pawl has also shared the axis of a part of fixed gear Xiang Li reduces the axial shearing force of the parts such as shift fork, drum, improves the safety in utilization of part.

The course of work: after axial two gear pawls combine, since the two basic change side of pawl is back taper, two Positive pressure is not only generated between faying face but also produces the axial tension for being directed toward gear face respectively.Axial tension makes two Gear produces the trend moved toward one another, can make to be axially moved gear rapidly in place in shift process.

Claims (5)

1. the end face of a kind of Gears for Motorcycle pawl structures, including gear (1) and pawl (2), the gear (1) is equipped with pawl (2), the pawl (2) is evenly spaced distribution along the circumferential direction of gear (1), which is characterized in that the two of the pawl (2) A side and gear (1) end face form back taper, pawl of the pawl (2) in conjunction with pawl gear, in conjunction with pawl gear (2) two basic change face is back taper.

2. a kind of Gears for Motorcycle pawl structures according to claim 1, which is characterized in that two axial tooths When wheel pawl (2) combines, positive pressure is not only generated between pawl (2) two junction but also is produced respectively and is directed toward gear (1) The axial tension of end face.

3. a kind of Gears for Motorcycle pawl structures according to claim 2, which is characterized in that the axial tension makes Two gears produce the trend moved toward one another, can make to be axially moved gear rapidly in place in shift process.

4. a kind of Gears for Motorcycle pawl structures according to claim 1, which is characterized in that pawl (2) side It is 87 ° with the back taper angle that gear (1) end face is formed.

5. a kind of Gears for Motorcycle pawl structures according to claim 1, which is characterized in that the pawl (2) is adopted Use forging molding.