Gear shifting position recognition device and gearbox

Abstract

The utility model relates to a gear shifting position recognition device and a gearbox, the gear shifting position recognition device is applied to the gearbox and used for recognizing the positions of a high-gear shifting fork and a low-gear shifting fork of an auxiliary box of the gearbox, and the gear shifting position recognition device comprises a sensing shaft; the position transmission shifting fork comprises a shifting fork arm and a fork angle structure, one end of the shifting fork arm is arranged outside the sensing shaft in a sleeving manner, the other end of the shifting fork arm and the fork angle structure are integrally formed, the fork angle structure is matched with the high-low gear shifting fork, the high-low gear shifting fork moves, and the sensing shaft can be driven to rotate through the position transmission shifting fork; and the angle sensor can detect the rotation angle of the sensing shaft and judge the position of the high-gear and low-gear shifting fork. According to the gear shifting position recognition device and the gearbox, the position movement of the high-gear shifting fork and the low-gear shifting fork is transmitted to the sensing shaft through a mechanical structure, the rotation angle of the sensing shaft is detected through the angle sensor, and then the on-gear condition of the high-gear shifting fork and the low-gear shifting fork can be obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a gear shift position identification device and a gearbox. Background Art

[0002] The shift fork is a critical component for achieving the gearshifting function of the transmission. Accurate identification of its position ensures correct gear engagement during gear shifting, avoiding mechanical damage or driving jerk caused by inaccurate shifting. Accurate shift fork position identification helps improve the smoothness of gear shifting, reduce impact and noise during gear shifting, and thus enhance driving and riding comfort. In addition, accurate shift fork position identification helps improve the gearshifting efficiency of the transmission, thereby enhancing the vehicle's power performance and economy.

[0003] In the existing technology, common methods for detecting the position of the shift fork include: using machine vision and laser detection technology to identify the position of the shift fork, collecting the outline image of the shift fork with an industrial camera, and then using a computer to process the image to determine the shape, size and position of the shift fork; or setting a laser sensor to emit laser light to the surface of the shift fork, and obtaining the shift fork position information by analyzing and processing the laser signal.

[0004] The above detection method has a complex structure and occupies a large area in the narrow space inside the gearbox. In addition, both visual detection and laser detection are easily interfered with by the environment, which affects the accuracy of position detection. Utility Model Content

[0005] To this end, the technical problem to be solved by the present invention is to overcome the defects of the shift fork position detection device in the prior art, and to provide a shift position identification device and a gearbox, which transmits the position movement of the high and low gear shift forks to the sensor shaft through a mechanical structure, and uses an angle sensor to detect the rotation angle of the sensor shaft to obtain the gear status of the high and low gear shift forks.

[0006] In order to solve the above technical problems, the present invention provides a shift position identification device, which is used in a gearbox to identify the high and low gear shift fork positions of the gearbox auxiliary box, including:

[0007] Sensing axis;

[0008] The position transmission shift fork comprises a shift fork arm and a fork angle structure, wherein one end of the shift fork arm is sleeved outside the sensing shaft, and the other end of the shift fork arm is integrally formed with the fork angle structure. The fork angle structure cooperates with the high and low gear shift forks. When the high and low gear shift forks move, the sensing shaft can be driven to rotate through the position transmission shift fork.

[0009] The angle sensor can detect the rotation angle of the sensing shaft and determine the position of the high and low gear shift forks.

[0010] In one embodiment of the present utility model, the fork angle structure has an arc groove, the high and low gear shift fork and the fork angle structure are matched through a cylindrical pin, the cylindrical pin is parallel to the sensing shaft, one end of the cylindrical pin is fixed on the high and low gear shift fork, and the other end abuts on the arc surface of the arc groove, the high and low gear shift fork drives the cylindrical pin to move horizontally, and the cylindrical pin shifts the position transmission fork along the arc surface to drive the sensing shaft to rotate.

[0011] In one embodiment of the present invention, both ends of the fork angle structure are extended in the direction of the high and low gear shift forks, and the cylindrical pin moves in the arc groove of the fork angle structure.

[0012] In one embodiment of the present invention, it also includes: a position transmission end cover, which is connected to the housing of the gearbox through a first locking bolt, the sensing shaft is passed through the position transmission end cover, and the two ends of the sensing shaft respectively protrude from the position transmission end cover, one end of which is connected to the position transmission fork, and the other end is passed through the angle sensor.

[0013] In one embodiment of the present invention, the angle sensor is fixed to the position transmitter end cover by a second locking bolt.

[0014] In one embodiment of the present invention, a position transmission limiting sleeve is further provided between the sensing shaft and the position transmission end cover. The position transmission limiting sleeve is provided outside the sensing shaft and supports the sensing shaft.

[0015] In one embodiment of the present invention, a position transmission limiting snap ring is further provided at one end of the position transmission limiting sleeve, and the position transmission limiting snap ring limits the axial movement of the sensing shaft.

[0016] In one embodiment of the present invention, the invention further comprises: an oil seal, wherein the oil seal is provided on one end of the sensing shaft connected to the angle sensor.

[0017] In one embodiment of the present invention, a sensor protection cover is further included, and the sensor protection cover is arranged outside the angle sensor.

[0018] In order to solve the above technical problems, the present invention also provides a gearbox, including the above gear shift position identification device.

[0019] The above technical solution of the utility model has the following advantages compared with the prior art:

[0020] The shift position recognition device of the utility model sets a position transmission fork and a high and low gear shift fork to cooperate, transmits the position movement of the high and low gear shift fork to the sensing shaft through a mechanical structure, and then uses an angle sensor to detect the rotation angle of the sensing shaft to obtain the gear status of the high and low gear shift fork. Compared with the existing technology, the structure of the mechanical power transmission method is more stable, the moving position of the high and low gear shift fork can be accurately transmitted to the sensing shaft, and the reliability is strong.

[0021] Only an angle sensor is set as the electronic device for detection, and detection is directly performed at one end of the sensing shaft, which reduces the complexity of the detection equipment, not only reduces the space occupied by the deceleration, but also reduces the interference of the external environment on the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 It is a structural diagram of the shift position identification device of the present utility model;

[0024] Figure 2 This is a structural diagram of the position transmission fork of the utility model;

[0025] Explanation of the reference numerals in the accompanying drawings in the specification: 1. Sensing shaft; 2. Position transmitter fork; 21. Fork arm; 22. Fork angle structure; 23. Arc groove; 24. Arc surface; 3. Angle sensor; 4. Position transmitter end cover; 5. First locking bolt; 6. Second locking bolt; 7. Position transmitter limit sleeve; 8. Position transmitter limit retaining ring; 9. Oil seal; 10. Sensor protection cover. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1 and Figure 2As shown, the utility model discloses a gear shift position identification device, which is used in a gearbox to identify the position of the high and low gear shift forks of the gearbox auxiliary box, including: a sensing shaft 1, a position transmission fork 2 and an angle sensor 3, wherein: the sensing shaft 1 and the position transmission fork 2 are connected, and when the position transmission fork 2 is prepared, the preparation material of the position transmission fork 2 is filled into the groove of the sensing shaft, so that the position transmission fork 2 and the sensing shaft are embedded and bonded, thereby ensuring that the sensing shaft 1 and the position transmission fork 2 rotate synchronously without offset and relative sliding, and the position transmission fork 2 is configured to cooperate with the high and low gear shift forks, and when the high and low gear shift forks move, a thrust can be applied to the position transmission fork 2, and the position transmission fork 2 can drive the sensing shaft 1 to rotate, and the position movement of the high and low gear shift forks is transmitted to the sensing shaft 1 through a mechanical structure, and then the angle sensor 3 is used to detect the rotation angle of the sensing shaft 1, so as to obtain the gear status of the high and low gear shift forks;

[0028] In this embodiment, the position transmission fork 2 is equivalent to a power transmission component, and the mechanical power transmission method is more stable. The moving position of the high and low gear forks can be accurately transmitted to the sensor shaft 1, which has high reliability.

[0029] Moreover, in this embodiment, only the angle sensor 3 is provided as the electronic device for detection, and detection is directly performed at one end of the sensing shaft 1, which reduces the complexity of the detection equipment, not only reduces the space occupied by the deceleration, but also reduces the interference of the external environment on the detection.

[0030] Reference Figure 2 As shown, specifically, in actual application, the high and low gear shift fork moves linearly along the axial direction. In order to convert the linear motion into rotation, the position transmission shift fork 2 includes: a shift fork arm 21 and a fork angle structure 22. The sensing shaft 1 is embedded in the shift fork arm 21. The other end of the shift fork arm 21 is integrally formed with the fork angle structure 22. The fork angle structure 22 cooperates with the high and low gear shift fork. The fork angle structure 22 is provided with an arc groove 23. The high and low gear shift fork cooperates with the fork angle structure 22 through a cylindrical pin. The cylindrical pin is connected to the The sensing shaft 1 is parallel, and one end of the cylindrical pin is fixed on the high and low gear shift fork, and the other end abuts on the arc surface of the arc groove 23. When the high and low gear shift fork moves linearly, it can drive the cylindrical pin to move horizontally. Because the cylindrical pin abuts against the arc surface, when the cylindrical pin moves horizontally, it can shift the position transmission fork 2 along the arc surface, and apply a driving force to the fork angle structure 22, thereby pushing the fork arm 21 to rotate at one end of the fork angle structure 22, so that the position transmission fork 2 revolves around the transmission shaft and drives the sensing shaft 1 to rotate.

[0031] Specifically, in order to prevent the cylindrical pin from slipping out of the arc groove 23, the two ends of the fork angle structure 22 are extended in the direction of the high and low gear shift fork, thereby further deepening the depth of the arc groove 23 and allowing the cylindrical pin to move in the arc groove 23 of the fork angle structure 22.

[0032] Reference Figure 1 As shown, in order to install and fix the gear shift identification device, in this embodiment, a position transmission end cover 4 is also provided, and the position transmission end cover 4 is detachably connected to the housing of the gearbox by a first locking bolt 5, and the angle sensor 3 is fixed to the position transmission end cover 4 by a second locking bolt 6; the sensing shaft 1 is passed through the position transmission end cover 4, and the position and extension direction of the sensing shaft 1 are fixed by the position transmission end cover 4, and the two ends of the sensing shaft 1 are respectively protruded from the position transmission end cover 4, one end of which is connected to the position transmission fork 2, and the other end is passed through the angle sensor 3.

[0033] Specifically, in order to support and limit the sensing shaft 1, a position transmission limiting sleeve 7 is further provided between the sensing shaft 1 and the position transmission end cover 4, and a position transmission limiting snap ring 8 is further provided at one end of the position transmission limiting sleeve 7, wherein:

[0034] The position transmission limit sleeve 7 is arranged outside the sensing shaft 1, and the position transmission limit sleeve 7 supports the sensing shaft 1. Through the support of the position transmission limit sleeve 7, the sensing shaft 1 can rotate relative to the position transmission end cover 4, which can reduce the friction caused by the rotation.

[0035] The position transmitter limit collar 8 can abut against the position transmitter end cover 4 to limit the axial movement of the sensing shaft 1 .

[0036] Specifically, in this embodiment, one end of the sensing shaft 1 passes through the interior of the gearbox housing, and the other end passes through the position transmitter end cover 4. There may be insufficient sealing in the through hole through which the sensing shaft 1 passes, thereby affecting the overall airtightness of the gearbox. In order to solve this problem, an oil seal 9 is further provided outside the position transmitter end cover 4. The oil seal 9 is sleeved on one end of the sensing shaft 1 connected to the angle sensor 3, and is used to seal the gap between the sensing shaft 1 and the position transmitter end cover 4.

[0037] Specifically, in this embodiment, a sensor protection cover 10 is further provided. The sensor protection cover 10 is provided outside the angle sensor 3 to protect the angle sensor 3 .

[0038] The utility model also discloses a gearbox, comprising the gear shift position identification device, and the gearbox is used in the automotive field.

[0039] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A shift position recognition device, used in a gearbox, for identifying the high and low gear shift fork positions of the gearbox auxiliary box, characterized in that: include: Sensing axis; The position transmission shift fork comprises a shift fork arm and a fork angle structure, wherein one end of the shift fork arm is sleeved outside the sensing shaft, and the other end of the shift fork arm is integrally formed with the fork angle structure. The fork angle structure cooperates with the high and low gear shift forks. When the high and low gear shift forks move, the sensing shaft can be driven to rotate through the position transmission shift fork. The angle sensor can detect the rotation angle of the sensing shaft and determine the position of the high and low gear shift forks.

2. The shift position recognition device according to claim 1, characterized in that: The fork angle structure has an arc groove, and the high and low gear shift fork is matched with the fork angle structure through a cylindrical pin. The cylindrical pin is parallel to the sensing shaft, one end of the cylindrical pin is fixed on the high and low gear shift fork, and the other end abuts against the arc surface of the arc groove. The high and low gear shift fork drives the cylindrical pin to move horizontally, and the cylindrical pin shifts the position shift fork along the arc surface to drive the sensing shaft to rotate.

3. The shift position recognition device according to claim 2, characterized in that: Both ends of the fork angle structure are extended in the direction of the high and low gear shift fork, and the cylindrical pin moves in the arc groove of the fork angle structure.

4. The shift position recognition device according to claim 1, characterized in that: Also includes: The position transmission end cover is connected to the housing of the gearbox through a first locking bolt. The sensing shaft is passed through the position transmission end cover. Both ends of the sensing shaft protrude from the position transmission end cover respectively, one end of which is connected to the position transmission fork, and the other end is passed through the angle sensor.

5. The shift position recognition device according to claim 4, characterized in that: The angle sensor is fixed to the position transmitter end cover via a second locking bolt.

6. The shift position recognition device according to claim 4, characterized in that: A position transmission limiting sleeve is further provided between the sensing shaft and the position transmission end cover. The position transmission limiting sleeve is provided outside the sensing shaft and supports the sensing shaft.

7. The shift position recognition device according to claim 6, characterized in that: A position transmission limiting snap ring is further provided at one end portion of the position transmission limiting sleeve, and the position transmission limiting snap ring limits the axial movement of the sensing shaft.

8. The shift position recognition device according to claim 1, characterized in that: Also includes: An oil seal is provided at one end of the sensing shaft connected to the angle sensor.

9. The shift position recognition device according to claim 1, characterized in that: It also includes a sensor protection cover, which is arranged outside the angle sensor.

10. A gearbox, characterized in that: The invention comprises the gear shift position recognition device according to any one of claims 1 to 9.

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