CN216666462U

CN216666462U - Stop mechanism of speed changing drum

Info

Publication number: CN216666462U
Application number: CN202123081740.7U
Authority: CN
Inventors: 蒲刚; 王亚飞; 赵学方; 汤世安
Original assignee: Chongqing Runtong Intelligent Equipment Co ltd
Current assignee: Chongqing Runtong Intelligent Equipment Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-06-03
Anticipated expiration: 2031-12-09

Abstract

The utility model discloses a speed change drum stopping mechanism, wherein one end of a speed change drum is provided with a gear shifting plate, the gear shifting plate is in transmission fit with the speed change drum, and the stopping mechanism comprises a stopping arm, a mounting bolt, a torsion spring and a stopping piece; the mounting bolt comprises a baffle part, a shaft body part and a screw rod part which are sequentially arranged along the axial direction of the mounting bolt, and the diameters of the baffle part, the shaft body part and the screw rod part are sequentially reduced; the first end of the stopping arm is rotatably provided with a stopping piece, and the second end of the stopping arm is rotatably arranged on the shaft body part; the torsion spring is sleeved on the shaft body part and positioned on one side of the stop arm, the first end of the torsion spring is connected with the gearbox body, and the second end of the torsion spring is connected with the stop arm; the screw part is in threaded connection with the gearbox body; the stop arm enables the stop piece to press the shifting plate under the action of the pretightening force of the torsion spring so as to position and stop the speed changing drum. The utility model has simple structure and convenient disassembly and assembly, can play a good role in stopping the speed-changing drum under the action of the pretightening force of the torsion spring, and is suitable for popularization and use.

Description

Stop mechanism of speed changing drum

Technical Field

The utility model relates to the technical field of transmissions, in particular to a speed change drum stop mechanism.

Background

The gear shift drum stop mechanism is a main component of the transmission and is an important part for gear shifting of motorcycles and all-terrain vehicles. All parts of the speed changing drum stopping mechanism are arranged in a speed changing box body of the speed changer, and after the speed changing box finishes gear shifting, the speed changing drum stopping mechanism abuts against a star-shaped gear shifting plate of the speed changing drum to form positioning stopping on the speed changing drum, so that the speed changer is prevented from sliding or moving backwards.

The utility model discloses a utility model patent that bulletin number is CN208997326U discloses an effectual variable speed drum of locking, and prior art discloses the effectual variable speed drum of locking, and its essence discloses a variable speed drum's locking mechanism, including casing and support, the inboard left end of casing and the left end fixed connection of support, the right-hand member fixedly connected with spacing ring of support, the inboard sliding connection of spacing ring has the mount, the equal fixedly connected with spliced pole in front end left and right sides of mount, the outside fixedly connected with spring of spliced pole, the outside rear end fixed connection of casing has the locating lever that the level set up, the outside sliding connection of locating lever has the push pedal of vertical setting, the front end fixedly connected with push rod of push pedal realizes spacing the accurate of variable speed drum through locating lever, push pedal and the fixed plate that sets up, promotes the locking effect.

Although the locking mechanism of the shift drum disclosed in the above-mentioned prior art can achieve a good locking effect, it is complicated in structure, troublesome to assemble and disassemble, and not highly practical, and therefore needs to be improved.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a speed-changing drum stopping mechanism which can solve the problems of complex structure and troublesome disassembly and assembly of the speed-changing drum stopping mechanism in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a speed change drum stopping mechanism, wherein one end of a speed change drum is provided with a gear shifting plate, the gear shifting plate is in transmission fit with the speed change drum, and the stopping mechanism comprises a stopping arm, a mounting bolt, a torsion spring and a stopping piece;

the mounting bolt comprises a baffle part, a shaft body part and a screw rod part which are sequentially arranged along the axial direction of the mounting bolt, and the diameters of the baffle part, the shaft body part and the screw rod part are sequentially reduced;

the first end of the stopping arm is rotatably provided with the stopping piece, and the second end of the stopping arm is rotatably arranged on the shaft body part; the torsion spring is sleeved on the shaft body part and is positioned on one side of the stopping arm, the first end of the torsion spring is connected with the gearbox body, and the second end of the torsion spring is connected with the stopping arm; the screw part is in threaded connection with the gearbox body;

the stop arm enables the stop piece to press the gear shifting plate under the action of the pretightening force of the torsion spring so as to position and stop the speed changing drum.

Preferably, the stop arm is provided with a hanging hole, the second end of the torsion spring is provided with a hook, and the torsion spring is hung in the hanging hole through the hook.

Preferably, the distance from the hanging hole to the first end of the stopping arm is smaller than the distance from the hanging hole to the second end of the stopping arm.

Preferably, the stopper is a rolling bearing coupled to one side of the first end of the stopper arm by a rivet.

Preferably, the variable speed drum stop mechanism further comprises a limiting sleeve, the limiting sleeve is sleeved on the shaft body part of the mounting bolt, the limiting sleeve is located on one side, away from the baffle part of the mounting bolt, of the stop arm, and the torsion spring sleeve is arranged on the limiting sleeve.

Preferably, the inner wall of the limiting sleeve is in interference connection with the outer wall of the baffle part of the mounting bolt.

Preferably, the inner wall of the stop collar is in sliding connection with the outer wall of the baffle part of the mounting bolt, one end of the stop collar, which is far away from the stop arm, is detachably provided with an annular stop baffle, and the stop baffle is in threaded connection with the end face, which is close to one end of the screw part, of the shaft part through a screw.

Preferably, the diameter of the outer circle of the limit baffle is larger than that of the outer circle of the limit sleeve.

Preferably, a circle of rolling balls are respectively embedded in two sides of one end, connected with the mounting bolt, of the stopping arm, a circle of rolling ball groove is respectively formed in the end face, close to the stopping arm, of the baffle part and the end face, close to the stopping arm, of the limiting sleeve, and the radial cross section of each rolling ball groove is arc-shaped and is matched with the rolling ball.

The utility model has the beneficial effects that:

the stop mechanism of the speed change drum realizes the positioning and stopping of the gear shifting plate on the speed change drum through the mutual connection and matching of the stop arm, the mounting bolt, the torsional spring and the stop piece, the stop arm enables the stop piece to press the gear shifting plate under the pre-tightening force of the torsional spring so as to position and stop the speed change drum, and the mounting bolt is arranged into the baffle part, the shaft body part and the screw part which are sequentially connected along the axial direction of the mounting bolt, the diameters of the baffle part, the shaft body part and the screw part are sequentially reduced, so that the stop limiting of the stop arm, the rotation matching of the stop arm and the mounting and connecting of the stop mechanism and the speed change box body are simultaneously realized through one part.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic illustration of a shift drum detent mechanism in accordance with an embodiment of the present disclosure mated to a shift paddle of a shift drum;

FIG. 2 is a schematic perspective view of a shift drum detent mechanism in an embodiment of the present disclosure;

FIG. 3 is a front structural schematic view of the shift drum stop mechanism (torsion spring not shown) in one embodiment of the present disclosure;

FIG. 4 is a sectional view A-A of FIG. 3;

FIG. 5 is a partial cross-sectional view of the shift drum stop mechanism in one embodiment of the present disclosure.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-5, the present invention provides a shift drum stopping mechanism, one end of the shift drum is provided with a five-star shift shifting plate 100, the shift shifting plate 100 is mounted on the shift drum through a hexagon bolt 200, the stopping mechanism comprises a plate-shaped stopping arm 1, a mounting bolt 2, a torsion spring 3 and a stopper 4; the mounting bolt 2 comprises a baffle part 21, a shaft body part 22 and a screw rod part 23 which are sequentially arranged along the axial direction of the mounting bolt, the diameters of the baffle part 21, the shaft body part 22 and the screw rod part 23 are sequentially reduced, and the baffle part 21, the shaft body part 22 and the screw rod part 23 are sequentially connected and integrally formed; a first end of the stopping arm 1 is rotatably provided with a stopping piece 4, and a second end of the stopping arm 1 is rotatably arranged on the shaft body part 22; the torsion spring 3 is sleeved on the shaft portion 22 and located on one side of the stop arm 1, a first end of the torsion spring 3 abuts against the inner wall of the transmission case 300, and a second end of the torsion spring 3 is connected with the stop arm 1; the screw part 23 is in threaded connection with the gearbox body 300; the stop arm 1 enables the stop piece 4 to press the gear shifting plate 100 under the action of the pretightening force of the torsion spring 3 so as to position and stop the speed changing drum.

The stop mechanism of the speed changing drum realizes the positioning and stopping of the gear shifting plate 100 on the speed changing drum by the mutual connection and matching of the stop arm 1, the mounting bolt 2, the torsion spring 3 and the stop piece 4, and can play a good stopping effect on the speed changing drum under the action of the pretightening force of the torsion spring 3; because simple structure, spare part is few, and the dismouting is more convenient, only needs to dismantle mounting bolt 2 from gearbox body 300 and can dismantle whole detent mechanism get off.

Specifically, in the present embodiment, the transmission case 300 refers to a case of a transmission case, or a case of an engine when a transmission is integrally mounted on the engine.

In one embodiment, the stopping arm 1 is provided with a hanging hole 11, the second end of the torsion spring 3 is provided with a hook 31, and the torsion spring 3 is hung in the hanging hole 11 through the hook 31. The connection between the torsion spring 3 and the stop arm 1 is realized through the matching of the hook 31 and the hanging hole 11, the connection is reliable, and the disassembly and the assembly between the torsion spring 3 and the stop arm 1 are convenient and quick.

In one embodiment, the distance from the hanging hole 11 to the first end of the stopping arm 1 is smaller than the distance from the hanging hole 11 to the second end of the stopping arm 1. The setting makes the arm of force of the pretightning force that torsional spring 3 applyed to retaining arm 1 longer to increase the holding power of stopper 4 to shifting gear shifting plate 100, improve the locking effect to the variable speed drum, prevent the variable speed drum better and move back the shelves or slide the shelves.

In one embodiment, the stop 4 is a rolling bearing which is attached to the side of the first end of the stop arm 1 by a rivet 9. Adopt antifriction bearing can with shift dial better looks adaptation of board 100's recess, and because antifriction bearing rotational resistance is little, when shifting, can effectively reduce to shift and dial board 100 pivoted resistance to guarantee to shift smoothly steady, shift more lightly, the sense of targetting in place stronger. Specifically, the rolling bearing in the present embodiment employs a deep groove ball bearing.

In one embodiment, the shift drum stopping mechanism further includes a limiting sleeve 5, the limiting sleeve 5 is sleeved on the shaft body portion 22 of the mounting bolt 2, the limiting sleeve 5 is located on one side of the stopping arm 1 away from the baffle portion 21 of the mounting bolt 2, and the torsion spring 3 is sleeved on the limiting sleeve 5. The rotating end of the stopping arm 1 is limited by arranging the limiting sleeve 5, the movable arm 1 is prevented from shaking in the axial direction of the mounting bolt 2 in the gear shifting process, the smooth and stable gear shifting is further improved, and the eccentric wear of an inner hole of the rotating end of the stopping arm 1 can be effectively avoided. The torsion spring 3 is sleeved on the limiting sleeve 5, so that the length of the mounting bolt 2 can be effectively reduced, and the occupied space of the stop mechanism is reduced.

In one embodiment, as shown in fig. 4, the inner wall of the position-limiting sleeve 5 is in interference connection with the outer wall of the baffle portion 21 of the mounting bolt 2. The limiting device is simple in structure and good in limiting effect.

In one embodiment, as shown in fig. 5, the inner wall of the position-limiting sleeve 5 is slidably connected with the outer wall of the baffle portion 21 of the mounting bolt 2, an annular position-limiting baffle 6 is detachably arranged at one end of the position-limiting sleeve 5 far away from the stopping arm 1, and the position-limiting baffle 6 is in threaded connection with the end surface of the shaft body portion 22 close to one end of the screw portion 23 through a screw 7. Like this, only need pull down the screw 7 of fixed limit baffle 6, just can take off stop collar 5 and locking arm 1 from construction bolt 2 fast, for the mode that stop collar 5 and construction bolt 2 interference are connected for the dismouting of stop collar 5 is more convenient, and the dismouting maintenance is more high-efficient.

In one embodiment, as shown in fig. 5, the diameter of the outer circle of the limit stop 6 is larger than that of the limit sleeve 5. Therefore, the limiting baffle 6 not only can limit the limiting position, but also can limit the torsion spring 3 sleeved on the limiting sleeve 5.

In one embodiment, as shown in fig. 5, a circle of rolling balls 8 is respectively embedded in both sides of one end of the stopping arm 1 connected with the mounting bolt 2, a circle of rolling ball grooves is respectively arranged on an end surface of the baffle portion 21 close to the stopping arm 1 and an end surface of the stop collar 5 close to the stopping arm 1, and the radial cross section of each rolling ball groove is arc-shaped and matched with the rolling ball 8. Therefore, sliding friction between two side surfaces of the stopping arm 1 and the baffle parts 21 of the limiting sleeve 5 and the mounting bolt 2 is converted into rolling friction, the rotating resistance of the stopping arm 1 is reduced, the shifting flexibility is further improved, the abrasion of contact surfaces among the stopping arm 1, the limiting sleeve 5 and the baffle parts 21 of the mounting bolt 2 is effectively reduced, and the service life is prolonged.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. A speed change drum stopping mechanism is characterized in that the stopping mechanism comprises a stopping arm, a mounting bolt, a torsion spring and a stopping piece, wherein one end of the speed change drum is provided with a gear shifting plate which is in transmission fit with the speed change drum;

the first end of the stopping arm is rotatably provided with the stopping piece, and the second end of the stopping arm is rotatably arranged on the shaft body part; the torsion spring is sleeved on the shaft body part and positioned on one side of the stop arm, the first end of the torsion spring is connected with the gearbox body, and the second end of the torsion spring is connected with the stop arm; the screw part is in threaded connection with the gearbox body;

2. The shift drum stop mechanism according to claim 1, wherein the stop arm is provided with a hanging hole, the second end of the torsion spring is provided with a hook, and the torsion spring is hung in the hanging hole through the hook.

3. The shift drum stop mechanism according to claim 2, wherein a distance from the hanging hole to the first end of the stop arm is less than a distance from the hanging hole to the second end of the stop arm.

4. The shift drum stop mechanism according to claim 1, wherein the stopper is a rolling bearing attached to one side of the first end of the stopper arm by a rivet.

5. The shift drum stop mechanism according to any one of claims 1 to 4, further comprising a stop collar that is fitted over the shaft portion of the mounting bolt and that is located on a side of the stop arm that is away from the skirt portion of the mounting bolt, wherein the torsion spring is fitted over the stop collar.

6. The shift drum stop mechanism according to claim 5, wherein an inner wall of the stop collar is in interference connection with an outer wall of the skirt portion of the mounting bolt.

7. The shift drum stop mechanism according to claim 5, wherein an inner wall of the stopper sleeve is slidably connected to an outer wall of the stopper portion of the mounting bolt, and an annular stopper plate is detachably provided to an end of the stopper sleeve remote from the stop arm, and is threadedly connected to an end surface of the shaft portion near an end of the screw portion by a screw.

8. The shift drum stop mechanism according to claim 7, wherein an outer circumferential diameter of the limit stop is greater than an outer circumferential diameter of the limit sleeve.

9. The shift drum stop mechanism according to any one of claims 6 to 8, wherein a circle of rolling balls are respectively embedded in both sides of one end of the stop arm connected to the mounting bolt, a circle of rolling ball grooves are respectively arranged on an end surface of the baffle portion close to the stop arm and an end surface of the limiting sleeve close to the stop arm, and a radial cross section of each rolling ball groove is arc-shaped and is matched with the rolling ball.