CN220015963U - Transmission gearshift and vehicle - Google Patents

Abstract

The utility model provides a transmission gear shifting device and a vehicle, wherein the transmission gear shifting device comprises a rotating hub, a speed reducing mechanism in transmission connection with the rotating hub, and a positioning mechanism for positioning the rotating hub; the rotating hub is rotationally arranged on the transmission shell, the speed reducing mechanism comprises a plurality of gear units which are sequentially arranged along the power transmission direction, and the rotating hub is in transmission connection with the gear units at the tail end; the positioning mechanism comprises a ratchet wheel coaxially connected with the rotating hub, a positioning arm rotationally arranged on the transmission shell, and an elastic piece arranged between the positioning arm and the transmission shell, wherein one end, close to the ratchet wheel, of the positioning arm is embedded into a groove on the peripheral surface of the ratchet wheel under the elastic pushing of the elastic piece. According to the transmission gear shifting device, the plurality of gear units are arranged, so that the power transmission structure is facilitated to be simplified, and the rotating hub which rotates in place can be positioned through the cooperation of the positioning arm which is rotatably arranged on the transmission shell and the elastic piece, so that the gear shifting reliability is improved.

Description

Transmission gearshift and vehicle

Technical Field

The utility model relates to the technical field of vehicle parts, in particular to a transmission gear shifting device. Meanwhile, the utility model also relates to a vehicle with the transmission gear shifting device.

Background

A transmission is a mechanism for changing rotational speed and torque from an engine that is capable of fixed or stepped changes in the output shaft and input shaft gear ratios, also known as a gearbox. In a gear shifting structure of the transmission, a power device drives a rotating hub to operate, a shifting fork matched with a groove on the rotating hub is driven to move, and the movement of the shifting fork drives a toothed sleeve to move, so that the toothed sleeve is engaged with a gear dog, and gear shifting is realized.

The existing gear shifting structure has two major problems, namely, the arrangement of a force transmission structure is complex, and the positioning structure for positioning the rotating hub after gear shifting is in place is complex, so that the positioning effect is poor, the gear shifting reliability is poor, and the safety of a vehicle is not facilitated.

Disclosure of Invention

In view of the above, the present utility model aims to propose a transmission shift device to simplify a power transmission structure and to promote shift reliability of a transmission.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a gear shifting device of a speed changer comprises a rotating hub, a speed reducing mechanism in transmission connection with the rotating hub and a positioning mechanism for positioning the rotating hub;

the rotating hub is rotationally arranged on the transmission shell, the speed reducing mechanism comprises a plurality of gear units which are sequentially arranged along the power transmission direction, and the rotating hub is in transmission connection with the gear units at the tail end;

the positioning mechanism comprises a ratchet wheel coaxially connected with the rotating hub, a positioning arm rotationally arranged on the transmission shell, and an elastic piece arranged between the positioning arm and the transmission shell, wherein one end, close to the ratchet wheel, of the positioning arm is embedded into a groove on the peripheral surface of the ratchet wheel under the elastic pushing of the elastic piece.

Further, one end of the positioning arm, which is close to the ratchet wheel, is rotatably provided with a rolling body, and the rolling body is embedded into the groove.

Further, along the axial direction of the rotating hub, a central point of the ratchet wheel is connected with a first connecting line M connected with a central point of the rolling body, a central point of the rolling body is connected with a second connecting line N connected with a rotating central point of the positioning arm, and the first connecting line M is connected with the second connecting line N.

Further, the rolling body is rotatably arranged on one side of the positioning arm through a first connecting piece, and a limiting part which is blocked on the other side of the rolling body is arranged on the first connecting piece relative to the positioning arm.

Further, a transmission gear which is coaxially arranged with the rotating hub is arranged on the rotating hub, and the rotating hub is in transmission connection with the gear unit at the tail end through the transmission gear.

Further, the ratchet wheel is arranged on one side of the transmission gear, which is opposite to the rotating hub, and the ratchet wheel and the transmission gear are coaxially arranged.

Further, the gear unit comprises an input gear and an output gear which are coaxially connected, and the outer diameter of the input gear is larger than that of the output gear.

Further, when one end of the positioning arm, which is close to the ratchet wheel, is separated from the groove at the positioning position, the positioning arm can return to the groove at the positioning position under the driving of the elastic piece; and/or, the positioning arm is bent.

Further, the positioning arm is rotatably arranged on the transmission shell through a second connecting piece penetrating through the positioning arm;

the elastic piece is a torsion spring sleeved on the second connecting piece.

Compared with the prior art, the utility model has the following advantages:

according to the transmission gear shifting device, the speed reducing mechanism in transmission connection with the rotating hub is arranged, the rotating hub can be driven to rotate through the gear units, the power transmission structure is facilitated to be simplified, one end, close to a ratchet wheel, of the positioning arm is embedded into the groove on the outer peripheral surface of the ratchet wheel through the cooperation of the positioning arm and the elastic piece, and the rotating hub can be positioned, so that the gear shifting reliability is improved.

In addition, the positioning arm is embedded into the groove through rotating the rolling body arranged on the positioning arm, so that the positioning effect on the groove can be improved, and the influence on normal rotation of the ratchet wheel can be reduced. The first connecting line is perpendicular to the second connecting line, so that the forward driving force driving the rotating hub to rotate is equal to the reverse driving force, and the power input effect in different directions is improved. Through set up spacing portion on first connecting piece, do benefit to and prevent that the rolling element from following self axial displacement. The transmission gear has a simple structure and good force transmission stability with the tail end gear unit.

In addition, by arranging the ratchet wheel on the side of the transmission gear, which is opposite to the rotating hub, the positioning arm is easy to be matched with the positioning of the ratchet wheel groove. The input gear and the output gear in the gear unit have simple structures and good force transmission effect. The positioning arm and the elastic piece can enable the positioning end of the positioning arm to return to the groove at the target position, so that the ratchet return effect is realized, and the gear shifting reliability is further improved; the positioning arm is bent, has higher strength and is easy to process and shape. The torsion spring is mature in product, so that acting force can be applied to the positioning arm, and the positioning effect of rotating the rotating hub in place is improved.

In addition, another object of the present utility model is to propose a vehicle provided with a transmission shifting device as described above.

The vehicle has the same beneficial effects as the transmission gear shifting device, and the vehicle is not repeated here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic illustration of a transmission shifter according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a positioning unit and a ratchet according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a positioning unit and a ratchet according to an embodiment of the present utility model in another view;

FIG. 4 is an internal cross-sectional view of a rolling element, pin and positioning arm according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a gear shifting device according to an embodiment of the present utility model when the gear shifting device is not in place.

Reference numerals illustrate:

1. a shift motor; 2. a first drive shaft; 3. a second drive shaft; 4. a rotating hub; 5. a ratchet wheel; 6. a transmission gear; 7. a positioning arm; 8. a bolt; 9. a pin; 10. a rolling element;

101. a motor gear;

201. a first input gear; 202. a first output gear;

301. a second input gear; 302. a second output gear;

401. a profile groove; 402. a shifting fork;

501. a groove;

801. a torsion spring;

901. a pin head; 902. a second portion; 903. a first portion; 904. and a limit protrusion.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an azimuth or a positional relationship such as "upper", "lower", "inner", "back", and the like are presented, they are based on the azimuth or the positional relationship shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The present embodiment relates to a transmission shift device that includes, in its entire construction, a hub 4, a speed reduction mechanism drivingly connected to the hub 4, and a positioning mechanism for positioning the hub 4.

The rotating hub 4 is rotatably arranged on the transmission shell, the speed reducing mechanism comprises a plurality of gear units which are sequentially arranged along the power transmission direction, and the rotating hub 4 is in transmission connection with the gear units at the tail end. The positioning mechanism comprises a ratchet wheel 5 coaxially connected with the rotating hub 4, a positioning arm 7 rotatably arranged on the transmission shell, and an elastic piece arranged between the positioning arm 7 and the transmission shell. Under the elastic pushing of the elastic member, one end of the positioning arm 7, which is close to the ratchet wheel 5, is embedded into the groove 501 on the outer peripheral surface of the ratchet wheel 5.

Based on the above general description, an exemplary configuration of the transmission shift device in the present embodiment is shown in fig. 1. The speed reducing mechanism is used for transmitting the power output by the gear shifting motor 1 to the rotating hub 4 so as to drive the rotating hub 4 to rotate. As a preferred embodiment, the gear unit comprises an input gear and an output gear coaxially connected, the outer diameter of the input gear being larger than the outer diameter of the output gear. Here, accept power through the input gear that external diameter is bigger and the number of teeth is more to output power through the output gear that external diameter is less and the number of teeth is less, do benefit to and realize the deceleration effect, and simple structure, be convenient for arrange and implement.

As shown in fig. 1, a transmission gear 6 is provided on the rotary hub 4 coaxially arranged with the rotary hub 4, and the rotary hub 4 is in transmission connection with the gear unit at the end through the transmission gear 6. The transmission gear 6 here facilitates a transmission connection with the gear unit, which in turn causes the rotation of the hub 4. In particular arrangement, as a preferable example, the transmission gear 6 is provided at one end portion of the hub 4, the ratchet 5 is provided at a side of the transmission gear 6 facing away from the hub 4, and the ratchet 5 is arranged coaxially with the transmission gear 6.

In this embodiment, the ratchet wheel 5 is disposed on the side of the transmission gear opposite to the rotating hub 4, and the ratchet wheel 5 and the transmission gear are coaxially disposed, which is beneficial to improving the compactness of the structure, reducing the space occupation, and improving the force transmission efficiency. Of course, solutions are also possible in which the ratchet wheel 5 and the transmission gear 6 are fastened to the hub 4 independently of each other. In practice, the transmission gear 6 may be fixed to the hub 4 by welding, bolting 8 or spline connection.

As shown in fig. 1, the gear units in the present embodiment are preferably two. For convenience of description, a gear unit that receives the power output from the shift motor 1 is referred to as a first gear unit, and a gear unit that outputs the power to the hub 4 is referred to as a second gear unit. The first gear unit comprises a first transmission shaft 2, a first input gear 201 and a first output gear 202 which are arranged on the first transmission shaft 2, the second gear unit comprises a second transmission shaft 3, a second input gear 301 and a second output gear 302 which are arranged on the second transmission shaft 3, and the second output gear 302 is meshed with the transmission gear 6. Wherein, the first transmission shaft 2, the second transmission shaft 3 and the rotating hub 4 are parallel.

In this embodiment, under the driving of the gear shifting motor 1, the power output by the motor gear 101 passes through the first gear unit and the second gear unit in sequence, and drives the rotating hub 4 to rotate through the transmission gear 6. Of course, in the specific implementation, the number, arrangement positions and the like of the gear units can be determined according to the use requirements.

As a preferred embodiment, the positioning arm 7 is bent, which is advantageous for improving the structural strength of the positioning arm 7. As shown in fig. 3, the positioning arm 7 has a substantially zigzag shape, and is simple in structure and easy to machine and shape. The positioning arm 7 in this embodiment is rotatably located below the ratchet wheel 5. For convenience of description, the end of the positioning arm 7 connected to the transmission case is referred to as a rotating end, and the other end of the positioning arm 7 is referred to as a positioning end.

Specifically, the positioning arm 7 is rotatably disposed on the transmission housing via a second connecting member passing through the positioning arm, and the elastic member is a torsion spring 801 sleeved on the second connecting member. The torsion spring 801 is mature in product, convenient to arrange and implement, and good in effect when being matched with the positioning arm 7.

In detail, referring to fig. 2 and 3, the second connecting member is specifically a bolt 8, a torsion spring 801 is sleeved on a rod portion of the bolt 8, one end of the torsion spring 801 is connected to the transmission housing, and the other end is connected to the positioning arm 7. The torsion spring 801 here acts to apply a force to the positioning end of the positioning arm 7 such that the positioning end in the positioned state is held in the recess 501. During shifting, when the ratchet wheel 5 is driven to rotate, the positioning arm 7 swings up and down within a certain angle due to the arrangement of the pawl and the groove 501 on the ratchet wheel 5. When the positioning arm 7 rotates away from the ratchet wheel 5 due to the pushing of the pawl on the ratchet wheel 5, the torsion spring 801 stores energy elastically to drive the positioning end on the positioning arm 7 to return.

As a preferred embodiment, the end of the positioning arm 7 near the ratchet wheel 5 is rotatably provided with rolling elements 10, the rolling elements 10 being embedded in the grooves 501. The rolling body 10 can not influence the rotation of the ratchet wheel 5 during gear shifting on one hand, and can also cooperate with the groove 501 on the other hand, so that a good positioning effect can be achieved. In this embodiment, the rolling elements 10 are embedded in the grooves 501 at the target position on the ratchet wheel 5 during positioning. The groove 501 at the target position refers to the groove 501 symmetrically located on the center line of the cross section of the ratchet wheel 5 arranged in the vertical direction. Of course, the target position may be adjusted as desired.

In a specific structure, as shown in fig. 3 and 4, the rolling element 10 is rotatably provided on the positioning arm 7 via a first connecting member provided with a stopper portion provided separately on both sides of the positioning arm 7 and the rolling element 10. The first connecting piece is a pin 9, wherein a pin head 901 of the pin 9 abuts against the outer side of the positioning arm 7, a pin body of the pin 9 passes through the positioning arm 7 and the rolling body 10, and the limiting part is a limiting protrusion 904 which is arranged on the pin body and is radially outwards protruded.

In this embodiment, the installation space between the pin head 901 of the pin 9 and the limiting protrusion 904 for limiting the positioning arm 7 and the rolling element 10 is not only convenient for arrangement and implementation, but also has better use effect. As an example of a structure, as shown in fig. 4, the rolling element 10 is provided with a through hole through which the pin 9 passes, and the positioning end of the positioning arm 7 is provided with a mounting hole through which the pin 9 passes, the diameter of the through hole being larger than the diameter of the mounting hole. The shank of pin 9 has a first portion 903 which extends through the mounting hole and a second portion 902 which extends through the through hole. The first portion 903 is in a clearance fit with the rolling element 10 and the second portion 902 is in an interference fit with the positioning arm 7.

In addition, still referring to fig. 4, the side of the rolling element 10 disposed toward the stopper projection 904 is provided with a concave portion, and the stopper projection 904 is located in the concave portion. Wherein the first portion 903 and the limit projection 904 are heat treated to increase the strength of the rolling element 10. The second portion 902 and the head 901 do not need to be heat treated, which is advantageous in reducing the production cost. Of course, the pin 9 in this embodiment can also be adaptively adjusted according to the diameter relation between the mounting hole and the through hole, so long as the requirement of use is satisfied.

In this embodiment, when the end of the positioning arm 7 near the ratchet wheel 5 is separated from the groove 501 at the target position, the positioning arm can be driven by the elastic member to return to the groove 501 at the target position. By the arrangement, the use reliability of the transmission gear shifting device when the gear shifting is out of position or the gear shifting is not in place can be improved.

In detail, as shown in fig. 5, when the shift out or shift in place occurs, the grooves 501 of the target position are symmetrically disposed on the vertical center line, that is, the grooves 501 are not located at the target position, so that the rolling elements 10 abut against the ends of the pawls located at one side of the grooves 501. At this time, the torsion of the torsion spring 801 overcomes the total resistance moment and drives the ratchet wheel 5 to rotate anticlockwise, so that the rolling bodies 10 are embedded into the grooves 501 at the target positions, and the return of the ratchet wheel 5 is realized. The total resistance moment here includes the friction moment of the shift motor 1 itself, the cogging moment of the shift unit, the sum of the resistance moment of each gear unit and the resistance moment of the transmission gear 6.

Correspondingly, as the rolling bodies 10 are embedded into the grooves 501 at the target positions, the ratchet wheel 5 drives the rotating hub 4 to rotate, and the shifting heads of the two shifting forks 402 also return to the target positions on the correspondingly arranged profile grooves 401, so that gear shifting is achieved. In this embodiment, through the effort of torsional spring 801, can guarantee the accuracy of shifting from mechanical structure, reduce the control accuracy of software to gear shifting motor 1 to do benefit to reduction in production cost.

As a preferred embodiment, as shown in fig. 3, a first line M connecting the center point of the ratchet wheel 5 with the center point of the rolling body 10, and a second line N connecting the center point of the rolling body 10 with the rotation center point of the positioning arm 7 are provided along the axial direction of the rotating hub 4, the first line M being perpendicular to the second line N. The arrangement is beneficial to ensuring that the forward driving force and the reverse driving force of the gear shifting motor 1 are equal in size, so that the reliability of the gear shifting device is further improved.

The speed changer gear shifting device of the embodiment can drive the rotating hub 4 to rotate through a plurality of gear units by arranging the speed reducing mechanism connected with the rotating hub 4 in a transmission way, thereby being beneficial to simplifying a power transmission structure, and enabling one end of the positioning arm 7, which is close to the ratchet wheel 5, to be embedded into the groove 501 on the outer peripheral surface of the ratchet wheel 5 by rotating the positioning arm 7 and the elastic piece to be matched with each other, so that the rotating hub 4 which is rotated in place can be positioned, and the gear shifting reliability is improved.

The present embodiment also relates to a vehicle provided with the transmission shift device as described above. The vehicle has the same advantageous effects as the above-described transmission shift device, and will not be described in detail here.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A transmission shifter, characterized by:

comprises a rotating hub (4), a speed reducing mechanism in transmission connection with the rotating hub (4) and a positioning mechanism for positioning the rotating hub (4);

the rotating hub (4) is rotationally arranged on the transmission shell, the speed reducing mechanism comprises a plurality of gear units which are sequentially arranged along the power transmission direction, and the rotating hub (4) is in transmission connection with the gear units at the tail end;

the positioning mechanism comprises a ratchet wheel (5) coaxially connected with the rotating hub (4), a positioning arm (7) rotationally arranged on the transmission shell, and an elastic piece arranged between the positioning arm (7) and the transmission shell, wherein one end, close to the ratchet wheel (5), of the positioning arm (7) is embedded into a groove (501) on the peripheral surface of the ratchet wheel (5) under elastic pushing of the elastic piece.

2. The transmission shifter of claim 1, wherein:

one end of the positioning arm (7) close to the ratchet wheel (5) is rotatably provided with a rolling body (10), and the rolling body (10) is embedded into the groove (501).

3. The transmission shifter of claim 2, wherein:

along the axial direction of the rotating hub (4), a central point of the ratchet wheel (5) is connected with a first connecting line M connected with a central point of the rolling body (10), a central point of the rolling body (10) is connected with a second connecting line N connected with a rotating central point of the positioning arm (7), and the first connecting line M is perpendicular to the second connecting line N.

4. The transmission shifter of claim 2, wherein:

the rolling body (10) is rotatably arranged on one side of the positioning arm (7) through a first connecting piece, and a limiting part which is blocked on the other side of the rolling body (10) is arranged on the first connecting piece relative to the positioning arm (7).

5. The transmission shifter of claim 1, wherein:

the rotary hub (4) is provided with a transmission gear (6) coaxially arranged with the rotary hub (4), and the rotary hub (4) is in transmission connection with the gear unit at the tail end through the transmission gear (6).

6. The transmission shifter of claim 5, wherein:

the ratchet wheel (5) is arranged on one side of the transmission gear (6) opposite to the rotating hub (4), and the ratchet wheel (5) and the transmission gear (6) are coaxially arranged.

7. The transmission shifter of claim 1, wherein:

the gear unit comprises an input gear and an output gear which are coaxially connected, and the outer diameter of the input gear is larger than that of the output gear.

8. The transmission shifter of claim 1, wherein:

when one end of the positioning arm (7) close to the ratchet wheel (5) is separated from the groove (501) at the positioning position, the positioning arm can return to the groove (501) at the positioning position under the driving of the elastic piece; and/or the number of the groups of groups,

the positioning arm (7) is bent.

9. The transmission shift device according to any one of claims 1 to 8, characterized in that:

the positioning arm (7) is rotatably arranged on the transmission shell through a second connecting piece penetrating through the positioning arm, and the elastic piece is a torsion spring (801) sleeved on the second connecting piece.

10. A vehicle, characterized in that:

the vehicle is provided with a transmission shift device according to any one of claims 1 to 9.