Speed reduction gear shifting mechanism

Abstract

The utility model provides a speed reduction gear shifting mechanism. The speed reduction gear shifting mechanism comprises a box body, a driving motor, a shifting fork and a speed reduction transmission mechanism, a mounting groove is formed in the box body; the driving motor is arranged on the side surface of the box body; the shifting fork is rotationally arranged in the mounting groove, a shifting head is arranged at one end of the shifting fork, a transmission part is arranged at the other end of the shifting fork, and a plurality of transmission teeth are arranged on the transmission part; the speed reduction transmission mechanism comprises a self-locking worm and a speed reduction gear, a plurality of first tooth parts and a plurality of second tooth parts are arranged on the speed reduction gear, the number of the first tooth parts is larger than that of the second tooth parts, the first tooth parts are meshed with the self-locking worm, and the second tooth parts are meshed with the transmission teeth. Compared with the prior art, the speed reduction gear shifting mechanism has the advantages that the motor can more accurately control the accurate rotation angle of the shifting fork through the speed reduction transmission mechanism, the gear shifting accuracy is improved, the structure is simple, and the gear shifting effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of gear shifting, in particular to a speed reduction gear shifting mechanism. Background Art

[0002] The electric shift mechanism achieves gear shifting by controlling the movement of the gearbox's speed-changing components. It is currently widely used in the field of electric vehicles. The electric shift mechanism usually includes a housing, a shift fork, and a motor. The motor drives the shift fork to move, and the shift fork drives the gearbox's speed-changing components to move to achieve gear shifting.

[0003] The current shift mechanism is usually driven by a motor to directly drive the shift fork to rotate. It is difficult to accurately rotate the shift fork to a corresponding angle, and the motor control accuracy requirement is relatively high. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and provide a speed reduction shifting mechanism.

[0005] An embodiment of the utility model provides a speed reduction shifting mechanism, comprising: a box, a driving motor, a shift fork and a speed reduction transmission mechanism;

[0006] The box body is provided with a mounting groove;

[0007] The driving motor is arranged on the side of the box body and is drivingly connected to the reduction transmission mechanism;

[0008] The shift fork is rotatably arranged in the mounting groove, a shift head is arranged at one end of the shift fork, the shift head extends out of the mounting groove, and a transmission part is arranged at the other end of the shift fork, and a plurality of transmission teeth are arranged on the transmission part;

[0009] The reduction transmission mechanism includes a self-locking worm and a reduction gear, the self-locking worm is connected to the driving motor, the reduction gear is rotatably arranged in the mounting groove, a plurality of first tooth portions and a plurality of second tooth portions are arranged on the reduction gear, the first tooth portions are arranged around the rotation axis of the reduction gear, the second tooth portions are arranged around the rotation axis of the reduction gear, the number of the first tooth portions is greater than the number of the second tooth portions, the first tooth portions are meshed with the self-locking worm, and the second tooth portions are meshed with the transmission teeth.

[0010] In some optional embodiments, the reduction gear and the fork are respectively located on opposite sides of the self-locking worm, an extension portion is provided at the end of the fork, the transmission portion is provided on the extension portion, and the extension portion gradually increases in a direction away from the fork.

[0011] In some optional embodiments, the shift fork and the self-locking worm are arranged in the middle of the mounting groove, the second tooth portion of the reduction gear is located on one side of the worm, and the extension portion gradually extends obliquely toward one side of the worm in a direction away from the shift fork.

[0012] In some optional embodiments, first rotating shaft portions are respectively provided on both sides of the shift fork, and the first rotating shaft portions are rotatably engaged with the inner wall of the mounting groove.

[0013] In some optional embodiments, second rotating shaft portions are respectively provided on both sides of the reduction gear, and the second rotating shaft portions are rotatably engaged with the inner wall of the mounting groove.

[0014] In some optional embodiments, an angle sensor is disposed on the outer side of the box, and the angle sensor is connected to the shift fork.

[0015] In some optional embodiments, a baffle is disposed on the outer side of the box, and the baffle is disposed on the outer side of the angle sensor.

[0016] In some optional embodiments, the baffle includes a top cover, a side panel, and a mounting edge connected in sequence, the top cover and the side panel are arranged around the angle sensor, and the mounting edge is detachably matched with the box body by screws.

[0017] In some optional embodiments, a profile groove is provided in the installation groove, the profile groove matches the shape of the reduction gear, and a portion of the reduction gear extends into the profile groove.

[0018] In some optional embodiments, a plurality of material reduction grooves are provided on the side of the box body.

[0019] Compared with the prior art, the speed reduction shifting mechanism of the utility model enables the motor to more accurately control the precise rotation angle of the shift fork through the speed reduction transmission mechanism, thereby improving the accuracy of the shifting, having a simple structure and good shifting effect.

[0020] In order to more clearly understand the present invention, the specific implementation of the present invention will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a speed reduction shifting mechanism according to an embodiment of the utility model;

[0022] Figure 2 A first cross-sectional view of a speed reduction shifting mechanism according to an embodiment of the utility model;

[0023] Figure 3 A second cross-sectional view of a speed reduction shifting mechanism according to an embodiment of the utility model;

[0024] Figure 4 The figure is a structural schematic diagram of one side of a speed reduction shifting mechanism according to an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 10. Box body; 11. Mounting groove; 12. Angle sensor; 13. Baffle; 14. Top cover; 15. Side panel; 16. Mounting edge; 17. Profile groove; 18. Reduction groove; 20. Driving motor; 30. Shift fork; 31. Shift head; 32. Transmission part; 33. Transmission tooth; 34. Extension part; 35. First rotating shaft part; 40. Speed ​​reduction transmission mechanism; 41. Self-locking worm; 42. Speed ​​reduction gear; 43. First tooth part; 44. Second tooth part; 45. Second rotating shaft part. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. In the description of the utility model, unless otherwise specified, "multiple" means 2 or more, and "several" means 1 or more. In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of the utility model, the description with reference to the terms "one embodiment", "some optional implementations" or "some optional embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] See also Figure 1 An embodiment of the utility model provides a speed reduction shifting mechanism, including: a housing 10, a driving motor 20, a shift fork 30 and a speed reduction transmission mechanism 40.

[0032] A mounting groove 11 is provided on the housing 10; a driving motor 20 is provided on the side of the housing 10 and is drivingly connected to the reduction transmission mechanism 40; a shift fork 30 is rotatably provided in the mounting groove 11, a shift head 31 is provided at one end of the shift fork 30, the shift head 31 extends out of the mounting groove 11, and a transmission part 32 is provided at the other end of the shift fork 30, and a plurality of transmission teeth 33 are provided on the transmission part 32.

[0033] The reduction transmission mechanism 40 can achieve transmission deceleration so that the shift fork rotates slowly. The reduction transmission mechanism 40 includes a self-locking worm 41 and a reduction gear 42. The self-locking worm 41 is connected to the drive motor 20. The reduction gear 42 is rotatably arranged in the mounting groove 11. A plurality of first tooth portions 43 and a plurality of second tooth portions 44 are arranged on the reduction gear 42. The first tooth portions 43 are arranged around the rotation axis of the reduction gear 42, and the second tooth portions 44 are arranged around the rotation axis of the reduction gear 42. The number of the first tooth portions 43 is greater than the number of the second tooth portions 44. The first tooth portions 43 are meshed with the self-locking worm 41, and the second tooth portions 44 are meshed with the transmission teeth 33. When the driving motor 20 drives the self-locking worm 41 to rotate one circle, the first tooth portion 43 will drive the reduction gear 42 to rotate at an angle corresponding to the first tooth portion 43. The more first tooth portions 43 there are, the smaller the angle of rotation of the reduction gear 42 will be. This requires the driving motor 20 to rotate the self-locking worm 41 for more circles to enable the reduction gear 42 to rotate to the corresponding angle. Therefore, increasing the number of first tooth portions 43 will make it easier for the motor to more accurately control the reduction gear 42 to rotate to an appropriate angle. When the reduction gear 42 rotates, the transmission portion 32 will be driven to move through the cooperation of the second tooth portion 44 and the transmission tooth 33, thereby driving the shift fork 30 to rotate. When the shift fork 30 rotates, it will shift the speed change component of the gearbox to move, thereby achieving gear shifting.

[0034] In some optional embodiments, the reduction gear 42 and the fork 30 are respectively located on opposite sides of the self-locking worm 41, and an extension portion 34 is provided at the end of the fork 30. The transmission portion 32 is provided on the extension portion 34. The extension portion 34 gradually increases in the direction away from the fork. In order to facilitate the arrangement of the transmission teeth 33, the width of the transmission portion 32 is relatively large, and the structure of the extension portion 34 is correspondingly widened, which is beneficial to improving the overall structural stability and strength of the fork 30.

[0035] When the drive motor 20 is arranged in the housing 10, due to the volume limitation of the housing 10, the drive shaft of the drive motor 20 is usually located in the middle of the housing 10. Therefore, the worm connected to the drive shaft is also located in the middle of the housing 10, and the shift fork 30 also needs to be arranged in the middle of the housing 10. Since the shift fork 30 and the reduction gear 42 are respectively located on opposite sides of the self-locking worm 41, this causes the transmission portion 32 on the shift fork 30 to be blocked by the worm and cannot cross the worm and directly connect to the reduction gear 42. In some optional embodiments, the shift fork 30 and the self-locking worm 41 are arranged in the middle of the mounting groove 11, and the second tooth portion 44 of the reduction gear 42 is located on one side of the worm, and the extension portion gradually extends toward one side of the worm in the direction away from the shift fork, thereby facilitating the connection of the transmission teeth 33 on the transmission portion 32 to the second tooth portion 44 of the reduction gear 42.

[0036] In some optional embodiments, first rotating shaft portions 35 are respectively provided on both sides of the shift fork 30 , and the first rotating shaft portions 35 are rotationally matched with the inner wall of the mounting groove 11 , thereby facilitating stable rotational matching between the shift fork 30 and the housing 10 .

[0037] In some optional embodiments, second rotating shaft portions 45 are respectively provided on both sides of the reduction gear 42 , and the second rotating shaft portions 45 are rotationally matched with the inner wall of the mounting groove 11 , thereby facilitating stable rotational matching between the reduction gear 42 and the box body 10 .

[0038] In some optional embodiments, an angle sensor 12 is provided on the outer side of the housing 10, and the angle sensor 12 is connected to the fork 30. The angle sensor 12 is used to detect the angle of the fork 30. In this embodiment, the first rotating shaft portion 35 of the fork 30 extends into the angle sensor 12 and is connected to the angle sensor 12, so that the angle sensor 12 can detect the angle of the fork 30. It can be determined by detecting the angle of the fork 30 whether the fork 30 is rotated to the correct angle, so that it can be determined whether the speed change component is accurately shifted to the corresponding gear position. The structure and principle of the angle sensor 12 are well known to those skilled in the art, and will not be described in detail here.

[0039] In some optional embodiments, a baffle 13 is provided on the outside of the box body 10. The baffle 13 is provided on the outside of the angle sensor 12. The baffle 13 can protect the angle sensor 12. In particular, the angle sensor 12 is usually designed with an electrical connector, which can be easily touched by other objects and cause an unstable connection. The baffle 13 can prevent the electrical connector from being unstable.

[0040] The specific structure of the baffle 13 can be designed according to actual needs. For example, in some optional embodiments, the baffle 13 includes a top cover 14, a side plate 15 and a mounting edge 16 connected in sequence. The top cover 14 and the side plate 15 are arranged around the angle sensor 12, and the mounting edge 16 is detachably matched with the box body 10 through screws. Of course, the structure of the baffle 13 is not limited to this, and those skilled in the art can also select other suitable structures according to the teachings of the utility model.

[0041] In some optional embodiments, a groove 17 is provided in the installation groove 11, and the groove 17 matches the shape of the reduction gear 42. Part of the reduction gear 42 extends into the groove 17, thereby facilitating the installation of the reduction gear 42, reducing the size of the installation groove 11, and improving the simplicity of the interior of the installation groove 11.

[0042] In some optional embodiments, a plurality of material reduction grooves 18 are provided on the side of the box body 10. The material reduction grooves 18 can reduce the weight of the box body 10 and can also reduce the material used for the box body 10, thereby saving costs.

[0043] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A speed reduction shifting mechanism, characterized in that: include: Box body, driving motor, shift fork and reduction transmission mechanism; The box body is provided with a mounting groove; The driving motor is arranged on the side of the box body and is drivingly connected to the reduction transmission mechanism; The shift fork is rotatably arranged in the mounting groove, a shift head is arranged at one end of the shift fork, the shift head extends out of the mounting groove, and a transmission part is arranged at the other end of the shift fork, and a plurality of transmission teeth are arranged on the transmission part; The reduction transmission mechanism includes a self-locking worm and a reduction gear, the self-locking worm is connected to the driving motor, the reduction gear is rotatably arranged in the mounting groove, a plurality of first tooth portions and a plurality of second tooth portions are arranged on the reduction gear, the first tooth portions are arranged around the rotation axis of the reduction gear, the second tooth portions are arranged around the rotation axis of the reduction gear, the number of the first tooth portions is greater than the number of the second tooth portions, the first tooth portions are meshed with the self-locking worm, and the second tooth portions are meshed with the transmission teeth.

2. A speed reduction shifting mechanism according to claim 1, characterized in that: The reduction gear and the shift fork are respectively located on opposite sides of the self-locking worm, an extension portion is arranged at the end of the shift fork, the transmission portion is arranged on the extension portion, and the extension portion gradually increases in a direction away from the shift fork.

3. A speed reduction shifting mechanism according to claim 2, characterized in that: The shift fork and the self-locking worm are arranged in the middle of the mounting groove, the second tooth portion of the reduction gear is located on one side of the worm, and the extension portion gradually extends obliquely toward one side of the worm in a direction away from the shift fork.

4. A speed reduction shifting mechanism according to claim 1, characterized in that: A first rotating shaft portion is respectively provided on both sides of the shift fork, and the first rotating shaft portion is rotatably matched with the inner wall of the mounting groove.

5. The speed reduction shifting mechanism according to claim 1, characterized in that: Second rotating shaft portions are respectively arranged on both sides of the reduction gear, and the second rotating shaft portions are rotatably matched with the inner wall of the mounting groove.

6. A speed reduction shifting mechanism according to any one of claims 1 to 5, characterized in that: An angle sensor is arranged on the outer side of the box body, and the angle sensor is connected to the shift fork.

7. A speed reduction shifting mechanism according to claim 6, characterized in that: A baffle is arranged on the outer side of the box body, and the baffle is arranged on the outer side of the angle sensor.

8. A speed reduction shifting mechanism according to claim 7, characterized in that: The baffle comprises a top cover, a side plate and a mounting edge which are connected in sequence, the top cover and the side plate are arranged around the angle sensor, and the mounting edge is detachably matched with the box body through screws.

9. A speed reduction shifting mechanism according to any one of claims 1 to 5, characterized in that: A profile groove is arranged in the installation groove, the profile groove matches the shape of the reduction gear, and a part of the reduction gear extends into the profile groove.

10. A speed reduction shifting mechanism according to any one of claims 1 to 5, characterized in that: A plurality of material reduction grooves are arranged on the side of the box body.

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