阅读说明：本技术 拨叉及防跳挡取力器 (Shifting fork and anti-gear-jumping power takeoff ) 是由 何汉明 于 2021-05-21 设计创作，主要内容包括：本发明涉及车辆设备技术领域,公开了一种拨叉及防跳挡取力器,该拨叉包括：拨动块、拨叉头和限位子弹头,所述拨动块和拨叉头同转轴并排设置,且拨叉头随所述拨动块在转动预定角度后转动,所述拨动块侧面设有V形限位槽,拨叉头侧面设有矩形限位槽,所述限位子弹头的同一端部设有插入所述V形限位槽的V形凸起和用于插入所述矩形限位槽的矩形凸起,且V形凸起突出于所述矩形凸起。本发明的拨叉在换挡时保证限位子弹头顶住拨叉头稳定不动,从而避免了脱挡或跳挡。(The invention relates to the technical field of vehicle equipment, and discloses a shifting fork and an anti-skip power takeoff, wherein the shifting fork comprises: the shifting block and the shifting fork head are arranged side by side with a rotating shaft, the shifting fork head rotates along with the shifting block after rotating for a preset angle, a V-shaped limiting groove is formed in the side face of the shifting block, a rectangular limiting groove is formed in the side face of the shifting fork head, a V-shaped protrusion inserted into the V-shaped limiting groove and a rectangular protrusion used for being inserted into the rectangular limiting groove are arranged at the same end of the limiting bullet head, and the V-shaped protrusion protrudes out of the rectangular protrusion. The shifting fork ensures that the limit bullet props against the shifting fork head to be stable and immovable when the shifting fork is used for shifting, thereby avoiding gear disengaging or gear jumping.)

1. A shift fork, comprising: the shifting block and the shifting fork head are arranged side by side with a rotating shaft, the shifting fork head rotates along with the shifting block after rotating for a preset angle, a V-shaped limiting groove is formed in the side face of the shifting block, a rectangular limiting groove is formed in the side face of the shifting fork head, a V-shaped protrusion inserted into the V-shaped limiting groove and a rectangular protrusion used for being inserted into the rectangular limiting groove are arranged at the same end of the limiting bullet head, and the V-shaped protrusion protrudes out of the rectangular protrusion.

2. The shift fork of claim 1, wherein the paddle block includes: the shifting block comprises a shifting block body, a sleeve rod arranged on one side of the shifting block body and a through hole penetrating through the shifting block body and the sleeve rod, wherein a tooth structure is arranged on the inner wall of the through hole, a V-shaped limiting groove is formed in the side surface of the shifting block body, a shifting fork head is provided with a sleeve hole, and the sleeve rod is rotatably sleeved in the sleeve hole.

3. The shifting fork according to claim 1, wherein a V-shaped shifting groove is formed in the side face of the shifting block, a V-shaped protrusion inserted into the V-shaped shifting groove is formed in the shifting end of the shifting fork head, and the angle of the V-shaped vertex angle corresponding to the V-shaped shifting groove is larger than that of the V-shaped vertex angle corresponding to the V-shaped protrusion.

4. The fork of claim 3, wherein the bottom of the V-shaped shift slot is arcuate and the top of the V-shaped protrusion is arcuate.

5. The fork of claim 1, wherein the bottom of the V-shaped retaining groove is arcuate and the top of the V-shaped protrusion is arcuate.

6. The fork of claim 1, wherein the rectangular retaining slot notch edge transitions with the fork head surface through a cambered surface.

7. The fork of claim 1, wherein the sides of the fork head at the edges of the rectangular retaining groove are provided with a depressed step.

8. A shifting fork according to any one of claims 1 to 7, wherein the side surface of the shifting block is provided with a plurality of V-shaped limiting grooves, and the side surface of the shifting fork head is provided with a plurality of rectangular limiting grooves.

9. An anti-skip power takeoff, characterized by comprising a shift fork according to any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of vehicle equipment, in particular to a shifting fork and an anti-skip power takeoff.

Background

The power takeoff is a device for transmitting the output of an engine to the car hopper jacking mechanism, when unloading is needed, the combination gear is shifted through the shifting fork, the combination gear is connected with the advancing gear and the driving gear, the advancing gear and the output shaft are disconnected, and the driving gear transmits power to the car hopper jacking mechanism so as to jack up the car hopper.

A conventional power take-off fork for a three-wheel truck is shown in fig. 1, and includes: the shifting fork head 4 and the limiting bullet head 5, the V-shaped groove on the side surface of the shifting fork head 4 is inserted into the conical surface at the front end of the limiting bullet head 5, the limiting bullet head 5 can be made to exit from the V-shaped groove when the shifting fork head 4 is shifted, the shifting fork head 4 is rotated, the shifting combination gear is shifted (shifting between a forward gear and a jacking gear), after the shifting is completed, the limiting bullet head 5 is jacked into the V-shaped groove again under the action of the rear end elastic part of the limiting bullet head 5, and the purpose of limiting is achieved. When the tricycle is unloaded, the tricycle is in a parking idle condition, the vehicle shakes strongly, and the shifting fork head 4 can enable the limiting bullet head 5 to be separated from the V-shaped groove under the shaking action, so that the tricycle is out of gear or jumps.

Disclosure of Invention

The invention provides a shifting fork and an anti-trip power takeoff, which solve the problem that the traditional shifting fork is easy to trip during gear shifting.

The invention provides a shift fork, comprising: the shifting block and the shifting fork head are arranged side by side with a rotating shaft, the shifting fork head rotates along with the shifting block after rotating for a preset angle, a V-shaped limiting groove is formed in the side face of the shifting block, a rectangular limiting groove is formed in the side face of the shifting fork head, a V-shaped protrusion inserted into the V-shaped limiting groove and a rectangular protrusion used for being inserted into the rectangular limiting groove are arranged at the same end of the limiting bullet head, and the V-shaped protrusion protrudes out of the rectangular protrusion.

Wherein, the block that dials includes: the shifting block comprises a shifting block body, a sleeve rod arranged on one side of the shifting block body and a through hole penetrating through the shifting block body and the sleeve rod, wherein a tooth structure is arranged on the inner wall of the through hole, a V-shaped limiting groove is formed in the side surface of the shifting block body, a shifting fork head is provided with a sleeve hole, and the sleeve rod is rotatably sleeved in the sleeve hole.

The V-shaped poking groove is formed in the side face of the poking block, the V-shaped protruding portion inserted into the V-shaped poking groove is formed in the poking end of the poking fork head, and the angle of the V-shaped vertex angle corresponding to the V-shaped poking groove is larger than the angle of the V-shaped vertex angle corresponding to the V-shaped protruding portion.

Wherein, V-arrangement striking groove bottom arc, V-arrangement bulge top is the arc.

Wherein, the bottom arc of V-arrangement spacing groove, the protruding top of V-arrangement is the arc.

The edge of the notch of the rectangular limiting groove is in transition with the surface of the shifting fork head through an arc surface.

And the side surface of the shifting fork head is positioned at the edge of the rectangular limiting groove and is provided with a sinking step.

The side surface of the shifting block is provided with a plurality of V-shaped limiting grooves, and the side surface of the shifting fork head is provided with a plurality of rectangular limiting grooves.

The invention also provides an anti-gear-jumping power takeoff which comprises the shifting fork.

According to the shifting fork, the shifting block of the traditional shifting fork is divided into the shifting block and the shifting fork head, the shifting fork head rotates along with the shifting block after rotating for a preset angle, due to the angle difference, the limiting bullet is pushed backwards through the V-shaped bulge when the shifting block rotates, so that the rectangular bulge is separated from the rectangular limiting groove, namely, the unlocking is realized, and the shifting fork head rotates along with the shifting block after rotating for the preset angle, so that the gear shifting is realized; after the gear shifting is completed, the V-shaped protrusion and the rectangular protrusion of the limiting bullet are automatically jacked into the V-shaped limiting groove and the rectangular limiting groove respectively due to the action of the spring at the other end of the limiting bullet, the shifting fork can be locked due to the cooperation of the rectangular limiting groove and the rectangular protrusion, when a vehicle shakes strongly, the situation that the rectangular protrusion of the limiting bullet is separated from the rectangular limiting groove under the shaking action of the shifting fork is avoided, the situation that the shifting fork is jacked by the limiting bullet to be stable and immovable is guaranteed, and therefore gear disengagement or gear skipping is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art fork;

FIG. 2 is a schematic view of a fork according to the present invention;

FIG. 3 is a schematic structural diagram of a shifting block of the shifting fork in FIG. 2;

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a schematic structural view of a fork head of the fork of FIG. 2;

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a schematic view of a spacing bullet of the fork of FIG. 2;

FIG. 8 is a schematic structural diagram of an anti-skip power takeoff according to the present embodiment;

fig. 9 is a front view of fig. 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The shift fork of this embodiment is as shown in fig. 2~7, includes: the shifting block 1, the shifting fork head 2 and the limiting bullet head 3 are arranged side by side with a rotating shaft, and the shifting fork head 2 rotates along with the shifting block 1 after rotating for a preset angle. The side of the poking block 1 is provided with a V-shaped limiting groove 12, the side of the poking fork head 2 is provided with a rectangular limiting groove 21, the same end of the limiting bullet head 3 is provided with a V-shaped protrusion 31 inserted into the V-shaped limiting groove 12 and a rectangular protrusion 32 inserted into the rectangular limiting groove 21, the V-shaped protrusion 31 protrudes out of the rectangular protrusion 32, when the poking block 1 rotates within a preset angle, the V-shaped protrusion 31 is ejected outwards, and therefore the rectangular protrusion 32 is driven to be separated from the rectangular limiting groove 21.

According to the shifting fork, a shifting block of a traditional shifting fork is divided into the shifting block 1 and the shifting fork head 2, the shifting fork head 2 rotates along with the shifting block 1 after rotating for a preset angle, due to an angle difference, the limiting bullet 3 is pushed backwards through the V-shaped protrusion 31 when the shifting block 1 rotates, so that the rectangular protrusion 32 is separated from the rectangular limiting groove 21, namely, unlocking is carried out, and the shifting fork head 2 rotates along with the shifting block 1 after rotating for the preset angle, so that gear shifting is realized; after the gear shifting is completed, the V-shaped protrusion 31 and the rectangular protrusion 32 of the limiting bullet 3 are automatically jacked into the V-shaped limiting groove 12 and the rectangular limiting groove 21 respectively due to the action of the spring at the other end of the limiting bullet 3, the shifting fork 2 can be locked due to the cooperation of the rectangular limiting groove 21 and the rectangular protrusion 32, the situation that the shifting fork 2 is separated from the rectangular limiting groove 21 due to the rectangular protrusion 32 of the limiting bullet 3 under the shaking action when the vehicle shakes strongly is avoided, the situation that the shifting fork 2 is jacked by the limiting bullet 3 to be stable and immovable is guaranteed, and therefore gear disengagement or gear skipping is avoided.

As shown in fig. 3 to 6, the dial block 1 includes: the shifting block comprises a shifting block main body 11, a sleeve rod 13 arranged on one side of the shifting block main body 11 and a through hole 14 penetrating through the shifting block main body 11 and the sleeve rod 13, wherein a tooth structure is arranged on the inner wall of the through hole 14, a V-shaped limiting groove 12 is arranged on the side surface of the shifting block main body 11, a shifting fork head 2 is provided with a sleeve hole 22, and the sleeve rod 12 is rotatably sleeved in the sleeve hole 22. The structure ensures that the shifting block 1 and the shifting fork head 3 are arranged side by side with the rotating shaft, and the structure is simple and easy to implement.

The side of the shifting block 1 is provided with a V-shaped shifting groove 15, the shifting end of the shifting fork head 2 is provided with a V-shaped protrusion 23 inserted into the V-shaped shifting groove 15, and the angle of the V-shaped vertex angle corresponding to the V-shaped shifting groove 15 is larger than the angle of the V-shaped vertex angle corresponding to the V-shaped protrusion 23. Dial the piece 1 and promote V-arrangement bulge 23 through stirring groove 15 when rotating to drive shifting fork 2 and rotate, as shown in fig. 2 dotted line frame, the angle that V-arrangement stirred the V-arrangement apex angle that groove 15 corresponds is greater than the angle that V-arrangement apex angle that V-arrangement bulge 23 corresponds is stirred to the V-arrangement, makes and dials piece 1 and can rotate predetermined angle earlier when being stirred. Further, the bottom of the V-shaped toggle groove 15 is arc-shaped, the top of the V-shaped protrusion 23 is arc-shaped, the arc-shaped structure is smoother, and the shifting fork head 2 is not easy to block when rotating along with the toggle block 1.

Similarly, the bottom of the V-shaped limiting groove 12 is arc-shaped, the top of the V-shaped protrusion 31 is arc-shaped, and the V-shaped protrusion 21 is more smooth when being pushed out from the V-shaped limiting groove 12 by the rotation of the poking block 1, so that the V-shaped protrusion is not easy to clamp.

As shown in fig. 6, the edge of the notch of the rectangular limiting groove 21 is in transition with the surface of the shifting fork head 2 through an arc surface, so that the rectangular protrusion 32 can be inserted into the rectangular limiting groove 21 smoothly without jamming.

As shown in fig. 5 and 6, due to a size or an installation error, or a vibration deviation, when the V-shaped protrusion 31 and the rectangular protrusion 32 are automatically pushed into the V-shaped limiting groove 12 and the rectangular limiting groove 21, respectively, the V-shaped protrusion 31 may interfere with the side surface of the shifting yoke 2, and therefore, the sinking step 24 is disposed on the side surface of the shifting yoke 2 at the edge of the rectangular limiting groove 21, and the sinking step 24 is only disposed near the shifting block 1, so that the V-shaped protrusion 31 is avoided when the V-shaped protrusion 31 and the rectangular protrusion 32 of the limiting bullet 3 are automatically pushed into the V-shaped limiting groove 12 and the rectangular limiting groove 21, respectively, under the action of the spring at the other end of the limiting bullet 3, and the V-shaped protrusion 31 is smoothly inserted into the V-shaped limiting groove 12.

In this embodiment, the side of the shifting block 1 is provided with a plurality of V-shaped limiting grooves 12, the side of the shifting fork head 2 is provided with a plurality of rectangular limiting grooves 21, and only the advancing gear and the jacking gear are distinguished in the power takeoff of the tricycle, so that the side of the shifting block 1 can be provided with two V-shaped limiting grooves 12, and the side of the shifting fork head 2 is provided with two rectangular limiting grooves 21. In practical application, the number of the V-shaped limiting grooves 12 and the number of the rectangular limiting grooves 21 can be specifically set according to actual gear conditions.

The invention also provides an anti-skip power takeoff which comprises the shifting fork, namely the shifting fork in the anti-skip power takeoff is the shifting fork. As shown in particular in fig. 8 and 9, the anti-skip power takeoff comprises: a driving gear 100, a forward gear 200, a coupling gear 300, an input shaft 400, an output shaft 500, a spring 700, a fork shaft 800, and a fork 600 having the above-described structure. The one end of input shaft 400 is connected and is advanced gear 200, output shaft 500 one end is connected and is combined gear 300, spring 700 one end is connected the spacing bullet of shift fork 600, the other end is fixed at the shell inner wall of anti-skip fender power takeoff, shift fork axle 800 passes the through-hole of the shifting block of shift fork 600, shift fork axle 800 surface is equipped with the tooth structure with tooth structure matched with in the through-hole, it rotates shift fork axle 800 and drives the shifting block rotation to rotate through external mechanism, the shifting block drives the shifting fork head and dials combination gear 300, in order to realize shifting (combination gear 300 connects advancing gear 200 and output shaft 500, it is the fender that advances this moment, with power transmission to the rear axle in order to drive the wheel, or combination gear 300 connects advancing gear 200 and driving gear 100, it is the fender that this moment, driving gear 100 drives external climbing mechanism and will the car fill jacking). Due to the adoption of the shifting fork with the structure, the gear jumping or gear disengaging is not easy to occur during gear shifting.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.