Shifting fork type intelligent disengagement device

Abstract

The utility model provides a shifting fork type intelligent disengagement device which comprises a shell, a power input shaft, a power output shaft and a driving gear sleeve, the power input shaft, the power output shaft and the driving gear sleeve are arranged in the shell, the shell is connected with a control motor, a motor shaft of the control motor is perpendicular to the power input shaft, the motor shaft is connected with a rotary actuating piece, and the rotary actuating piece is connected with the driving gear sleeve. A sliding block capable of sliding in the axial direction of the driving gear sleeve is further arranged in the shell, a shifting fork is connected to the sliding block, shifting fork grooves distributed in the circumferential direction of the driving gear sleeve are formed in the outer wall of the driving gear sleeve, and the shifting fork is assembled in the shifting fork grooves. The control motor is used for driving the rotary actuating piece to rotate in the circumferential direction so as to drive the sliding block to move horizontally in the axial direction, and the sliding block drives the driving gear sleeve to move horizontally through the shifting fork so as to achieve connection and disconnection of the power input shaft and the power output shaft. According to the shifting fork type intelligent disengagement device, a switching structure between a four-wheel drive and a two-wheel drive is stable in operation and not prone to being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power control, in particular to a shift fork type intelligent disconnector. Background Art

[0002] With the innovative development of the new energy vehicle industry, automobile transmission technology is constantly being updated and iterated. New products are emerging one after another, and the demand for new transmission methods is beginning to emerge. Electric four-wheel drive vehicles are gradually entering the market. Electric four-wheel drive vehicles are equipped with two front and rear electric drive systems. However, the vehicle does not always need two electric drive systems to work at the same time. Under normal circumstances, only one electric drive system is needed to meet the normal driving of the vehicle. When high torque is required, such as starting, climbing, overtaking and other working conditions, the front and rear electric drive systems are started at the same time. In order to improve efficiency, a disengagement mechanism is added to one of the electric drive systems to ensure that the other motor is disengaged when one motor is driving, thereby reducing the mechanical resistance and drag resistance loss of the electric drive system.

[0003] The disconnector is an important component for realizing the conversion between four-wheel drive and two-wheel drive. There is no relatively mature product for the disconnector in the domestic market. The applicant has previously developed a new type of power intelligent disconnector, which transmits power to the planetary gear set mechanism by controlling the operation of the motor, and an eccentric shift block is connected to the power output end of the planetary gear set mechanism, and a positioning gear sleeve is slidingly arranged between the power input shaft and the power output shaft. A shift groove that cooperates with the eccentric shift block is provided on the outer wall of the positioning gear sleeve. That is, when working, the control motor drives the eccentric shift block to rotate, and the eccentric rotation motion of the eccentric shift block cooperates with the shift groove structure to drive the positioning gear sleeve to move axially, thereby realizing the connection or disconnection of the power input shaft and the power output shaft.

[0004] In the above-mentioned existing disconnector structure, the rotational power of the eccentric shift block directly drives the axial translation of the positioning gear sleeve. First, this method is similar to a lever-type drive, with a small contact area and an unstable driving force. Secondly, in this driving method, the rotational force of the eccentric shift block is not entirely an axial component acting on the positioning gear sleeve, but also a radial component, which can easily cause the positioning gear sleeve to deviate radially and become stuck, thereby causing a failure in the connection or disconnection of the power input shaft and the power output shaft, affecting normal use. Utility Model Content

[0005] In order to overcome at least one of the above defects in the prior art, the present invention provides a fork-type intelligent disconnector, and the switching structure between four-wheel drive and two-wheel drive operates smoothly and is not prone to jamming.

[0006] The utility model provides a shift fork type intelligent disconnector: comprising a shell, a power input shaft, a power output shaft and an active gear sleeve arranged in the shell, a control motor connected to the shell, the motor shaft of the control motor is perpendicular to the power input shaft, a rotary actuator is connected to the motor shaft, a slider slidable along the axial direction of the active gear sleeve is further provided in the shell, a shift fork is connected to the slider, and the shift fork is connected to the active gear sleeve, the control motor is used to drive the rotary actuator to rotate circumferentially to drive the slider to translate axially, and the slider drives the active gear sleeve to translate through the shift fork to realize the connection and disconnection of the power input shaft and the power output shaft.

[0007] Compared with the existing technology, the fork-type intelligent disconnector of the utility model has the following advantages:

[0008] First, a rotary actuator and a slider that can move axially along the active gear sleeve are provided in the housing. The rotary actuator is used to convert the rotational force input by the control motor into a force that drives the slider to move axially, and a shift fork structure is also connected to the slider. The shift fork is driven by the slider to push the active gear sleeve to move axially, thereby realizing the connection and disconnection of the power input shaft and the power output shaft. In this structure, the shift fork is axially translated, so the axial thrust acting on the active gear sleeve is smooth and reliable, and there is no radial component force, thereby ensuring that the active gear sleeve does not deviate during translation and cause the mating to jam.

[0009] Furthermore, the rotary actuator includes a cam, one end of the cam is connected to the motor shaft, the other end of the cam is provided with an eccentric groove, and one end of the slider is movably mounted in the eccentric groove.

[0010] As an improvement, a mounting tube perpendicular to its axis is connected to the outer wall of the shell, the control motor is connected to the outer end of the mounting tube, and a sliding guide rail extending axially along the active gear sleeve is connected to the inner wall of the mounting tube, and the slider is slidably fitted on the sliding guide rail.

[0011] As a further improvement, a positioning ring is mounted on the inner wall of the mounting tube, a guide rod parallel to the power input shaft is connected to the inner wall of the positioning ring, and the slider is slidably fitted on the guide rod; the end of the cam away from the motor shaft is rotatably mounted in the positioning ring.

[0012] As a further improvement, the eccentric groove is a long strip structure, a positioning column is connected to the sliding block, a bearing is sleeved on the outside of the positioning column, and the bearing is slidably fitted in the eccentric groove.

[0013] Further improvement, a positioning boss is provided on the outer wall of the positioning ring, and a positioning pin extending along its axial direction is connected to the positioning boss, a positioning groove is provided on the side wall of the inner end of the mounting tube, a positioning pin hole is provided on the bottom surface of the positioning groove, the positioning ring is fitted in the positioning groove through the positioning boss, and the positioning pin is inserted into the positioning pin hole.

[0014] As a further improvement, a mounting groove is provided at one end of the slider away from the positioning column, and a mounting protrusion is provided at the middle part of the end of the shift fork away from the active gear sleeve, and the mounting protrusion is detachably embedded in the mounting groove.

[0015] As a further improvement, the power input shaft is provided with driving external teeth on the outer wall near one end of the power output shaft, and the power input shaft is provided with a plurality of positioning external teeth distributed at intervals along the axial direction on the outer wall near one end of the power input shaft; one end of the active gear sleeve is sleeved on the outside of the power input shaft and meshes with the driving external teeth, and the other end is sleeved on the outside of the power input shaft, and is engaged with or disengaged from the positioning external teeth as the active gear sleeve moves axially.

[0016] As a further improvement, a planetary gear mechanism is further installed in the housing, the input end of the planetary gear mechanism is connected to the power output end of the control motor, and the output end of the planetary gear mechanism is connected to the rotary actuator.

[0017] Further improved, the planetary gear mechanism includes a sun gear, three planetary gears, a planetary carrier and an outer ring gear, the outer ring gear is fixedly connected in the housing, the sun gear is axially connected to the middle of one end of the planetary carrier, and the sun gear is connected to the motor shaft of the control motor, the other end of the planetary carrier is connected to the rotating brake member, the three planetary gears are distributed in the circumferential direction and are rotatably connected to the planetary carrier along their own axes, and the three planetary gears are simultaneously engaged with the sun gear, and the three planetary gears are also simultaneously engaged with the inner ring of the outer ring gear.

[0018] Other improved features and advantages of the present invention will be described in the following detailed description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of the fork-type intelligent release device of the present utility model;

[0020] Figure 2 for Figure 1 Another angle diagram of the middle fork type intelligent release;

[0021] Figure 3 This is a diagram showing the connection structure between the valve cover and the sealing gasket in the present invention;

[0022] Figure 4 It is a vertical cross-sectional view of the fork-type intelligent release device of the present invention;

[0023] Figure 5 for Figure 4 The X in the figure is enlarged;

[0024] Figure 6 for Figure 4 Enlarge the structure diagram at Y in .

[0025] Description of reference numerals:

[0026] 1. Housing; 2. Power input shaft; 3. Power output shaft; 4. Driving gear sleeve; 5. Control motor; 6. Motor shaft; 7. Rotary actuator; 8. Slider; 9. Shift fork; 10. Shift fork slot; 11. Cam; 12. Eccentric groove; 13. Mounting tube; 14. Locating ring; 15. Guide rod; 16. Locating column; 17. Bearing; 18. Sun gear; 19. Planet gear; 20. Planet carrier; 21. Outer ring gear; 22. Locating boss; 23. Locating pin; 24. Locating groove; 25. Mounting groove; 26. Mounting bump. DETAILED DESCRIPTION

[0027] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0028] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "fixed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0029] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] See also Figures 1 to 6As shown, the embodiment of the present application discloses a shift fork type intelligent disconnector, comprising a shell 1, a power input shaft 2, a power output shaft 3 and an active gear sleeve 4 arranged in the shell 1, wherein the shell 1 here is a cylindrical structure, and the power input shaft 2, the power output shaft 3 and the active gear sleeve 4 are all coaxially arranged, and the two ends of the active gear sleeve 4 are respectively connected to the power input shaft 2 and the power output shaft 3, and the connection and disconnection of the power input shaft 2 and the power output shaft 3 are realized by the axial translation of the active gear sleeve 4, that is, the switching between four-wheel drive and two-wheel drive of the vehicle is realized.

[0031] In the above structure, a driving external tooth is provided on the outer wall of the power input shaft 2 near the end of the power output shaft 3, and a plurality of positioning external teeth distributed at intervals along the axial direction are provided on the outer wall of the power input shaft 2 near the end of the power input shaft 2; one end of the driving gear sleeve 4 is sleeved on the outside of the power input shaft 2 and meshes with the driving external tooth, and the other end is sleeved on the outside of the power input shaft 2, and is engaged with or disengaged from the positioning external tooth as the driving gear sleeve 4 moves axially.

[0032] For details, see the attached Figure 4 、 5 and 6, a control motor 5 is connected to the housing 1, the motor shaft 6 of the control motor 5 is perpendicular to the power input shaft 2, and a rotary actuator 7 is connected to the motor shaft 6, and a slider 8 is provided in the housing 1 that can slide along the axial direction of the active gear sleeve 4, a shift fork 9 is connected to the slider 8, and the shift fork 9 is connected to the active gear sleeve 4. Preferably, a shift fork groove 10 distributed along its circumference is provided on the outer wall of the active gear sleeve 4, and the shift fork 9 is fitted in the shift fork groove 10. The control motor 5 is used to drive the rotary actuator 7 to rotate circumferentially to drive the slider 8 to translate axially. The slider 8 drives the active gear sleeve 4 to translate through the shift fork 9 to achieve connection and disconnection between the power input shaft 2 and the power output shaft 3. The shift fork 9 in this structure is an annular structure with an opening on one side, and when the shift fork 9 is clamped in the shift fork groove 10 outside the active gear sleeve 4, the matching area of the shift fork 9 and the shift fork groove 10 exceeds half of the area of the outer circumference of the active gear sleeve 4, further ensuring a stable driving force.

[0033] In the above-mentioned disconnector structure, the power is transmitted to the rotary actuator 7 by controlling the motor 5, and then the rotational force of the rotary actuator 7 is switched to the axial thrust of the slider 8. The slider 8 drives the shift fork 9 to push the active gear sleeve 4 to move axially, thereby realizing the connection and disconnection of the power input shaft 2 and the power output shaft 3. In addition, in this structure, the matching area of the shift fork 9 and the shift fork groove 10 of the active gear sleeve 4 is large, so the axial thrust acting on the active gear sleeve 4 is stable and reliable, and there is no radial component force, ensuring that the active gear sleeve 4 does not deviate during the translation process and cause the matching to get stuck.

[0034] In this embodiment, preferably, see the attached Figure 5 、 6The rotary actuator 7 includes a cam 11, one end of which is in driving connection with the motor shaft 6. The other end of the cam 11 is provided with an eccentric groove 12. The end of the slider 8 away from the shift fork 9 is movably mounted in the eccentric groove 12. The motor shaft 6 drives the cam 11 to rotate circumferentially. During this rotation, under the action of the eccentric groove 12, the slider 8 will translate along the axial direction of the active gear sleeve 4, thereby driving the axial translation of the shift fork 9. This structure is simple and the driving force is stable.

[0035] More specifically, a mounting tube 13 perpendicular to its axis is connected to the outer wall of the shell 1, and the mounting tube 13 is connected to the inner cavity of the shell 1. The control motor 5 is axially connected to the outer end of the mounting tube 13, and the motor shaft 6 extends vertically into the shell 1. The inner wall of the mounting tube 13 is connected to a sliding guide rail extending axially along the active gear sleeve 4, and the slider 8 slides on the sliding guide rail to ensure that the moving direction of the slider 8 is accurate, controllable, and moves smoothly.

[0036] In this embodiment, see the attached Figure 4 、 5 , and 6, a positioning ring 14 is installed on the inner wall of the mounting tube 13, and two guide rods 15 parallel to the power input shaft 2 are connected to the inner wall of the positioning ring 14, and the slider 8 is slidably fitted on the two guide rods 15; in addition, the end of the cam 11 away from the motor shaft 6 is rotatably mounted in the positioning ring 14, ensuring that the cam 11 rotates smoothly and controllably without radial swing, thereby ensuring the stability of the axial movement of the active gear sleeve 4 driven by the shift fork 9, thereby avoiding the deflection of the active gear sleeve 4 during the movement process, resulting in the power output shaft 3 and the active rack 4 not being self-locked and stuck during the engagement process, thereby improving the reliability of power switching.

[0037] Furthermore, in the above structure, two connecting holes are opened on the slider 8, and bearing sleeves are installed in the two connecting holes. The two guide rods 15 can be slidably inserted into the corresponding bearing sleeves, which not only increases the wear resistance, but also avoids the noise generated during the sliding process of the slider 8.

[0038] Preferably, the above-mentioned eccentric groove 12 is a long strip structure, and a positioning column 16 is connected to the slider 8. The outer part of the positioning column 16 is provided with a bearing 17, and the bearing 17 is slidably fitted in the eccentric groove 12. The structural setting of the bearing 17 here not only facilitates the active cooperation between one end of the slider 8 and the cam 11, but also has the effect of wear resistance and noise reduction; in addition, the cam 11 structure is used to rotate and control the translation of the slider 8, and accurately control the engagement and disengagement movement of the power input shaft 2 and the power output shaft 3, thereby ensuring the accuracy of the engagement and increasing the reliability of the product.

[0039] In the above structure, in order to facilitate the installation of the positioning ring 14 and ensure the stability of the positioning ring 14 after installation, an annular positioning boss 22 is provided on the outer wall of the positioning ring 14, and the positioning boss 22 is connected to a positioning pin 23 extending along its axial direction. A positioning groove 24 is provided on the side wall of the inner end of the mounting tube 13, and a positioning pin hole is provided on the bottom surface of the positioning groove 24. The positioning ring 14 is fitted in the positioning groove 24 through the positioning boss 22, and the positioning pin 23 is inserted into the positioning pin hole to effectively prevent the positioning ring 14 from circumferential rotation, thereby ensuring the smooth sliding of the slider 8.

[0040] In addition, in this embodiment, for the convenience of processing and installation, the shift fork 9 and the slider 8 are detachable oblique mounting structures, specifically, a mounting groove 25 is provided at the end of the slider 8 away from the positioning column 16, and a mounting protrusion 26 is provided in the middle of the end of the shift fork 9 away from the active gear sleeve 4. The mounting protrusion 26 is detachably embedded in the mounting groove 25, and a plurality of fastening screws are further connected between the mounting protrusion 26 and the slider 8 to ensure the stability of the connection structure.

[0041] Furthermore, in this embodiment, to increase the axial thrust of the shift fork 9, a planetary gear mechanism is also installed within the housing 1. The input end of the planetary gear mechanism is connected to the power output end of the control motor 5, and the output end of the planetary gear mechanism is connected to the rotary actuator 7. The planetary gear mechanism is used to amplify the output torque of the control motor 5, thereby increasing the axial force of the shift fork 9 and ensuring that the mating teeth between the driving gear sleeve 4 and the power output shaft 3 have sufficient bonding force.

[0042] For details, see the attached Figure 4 、 5 The planetary gear mechanism includes a sun gear 18, three planetary gears 19, a planetary carrier 20 and an outer ring gear 21. The outer ring gear 21 is fixedly connected to the housing 1, specifically, it is tightly mounted on the inner wall of the mounting sleeve. The sun gear 18 is axially connected to the middle part of one end of the planetary carrier 20, and the sun gear 18 is connected to the motor shaft 6 of the control motor 5. The other end of the planetary carrier 20 is connected to the rotating brake member. The three planetary gears 19 are evenly distributed along the circumference and are rotatably connected to the planetary carrier 20 along their own axes. The three planetary gears 19 are simultaneously engaged with the sun gear 18, and the three planetary gears 19 are also simultaneously engaged with the inner ring of the outer ring gear 21.

[0043] In this embodiment, the planetary gear mechanism can also achieve axial compression and limiting effect on the positioning ring 14 through the cam 11 structure. No other connection is required for the positioning ring 14, making the overall installation structure more compact and simple.

[0044] In the description of this application, the description with reference to the terms "this embodiment", "some embodiments", etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are mutually inconsistent.

[0045] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A shift fork type intelligent disconnector, comprising a housing (1), a power input shaft (2), a power output shaft (3) and an active gear sleeve (4) arranged in the housing (1), a control motor (5) connected to the housing (1), a motor shaft (6) of the control motor (5) being perpendicular to the power input shaft (2), and characterized in that: The motor shaft (6) is connected to a rotary actuator (7). A slider (8) slidable along the axial direction of the active gear sleeve (4) is further provided in the housing (1). A shift fork (9) is connected to the slider (8), and the shift fork (9) is connected to the active gear sleeve (4). The control motor (5) is used to drive the rotary actuator (7) to rotate circumferentially to drive the slider (8) to translate axially. The slider (8) drives the active gear sleeve (4) to translate through the shift fork (9) to achieve connection and disconnection between the power input shaft (2) and the power output shaft (3).

2. The fork-type intelligent release device according to claim 1, characterized in that: The rotary actuator (7) includes a cam (11), one end of the cam (11) is connected to the motor shaft (6), the other end of the cam (11) is provided with an eccentric groove (12), and one end of the slider (8) is movably mounted in the eccentric groove (12).

3. The fork-type intelligent release device according to claim 2, characterized in that: The outer wall of the housing (1) is connected to a mounting tube (13) perpendicular to its axis, the control motor (5) is connected to the outer end of the mounting tube (13), the inner wall of the mounting tube (13) is connected to a sliding guide rail extending along the axial direction of the active gear sleeve (4), and the slider (8) is slidably fitted on the sliding guide rail.

4. The fork-type intelligent release device according to claim 3, characterized in that: A positioning ring (14) is mounted on the inner wall of the mounting tube (13), a guide rod (15) parallel to the power input shaft (2) is connected to the inner wall of the positioning ring (14), and the slider (8) is slidably fitted on the guide rod (15); the end of the cam (11) away from the motor shaft (6) is rotatably mounted in the positioning ring (14).

5. The fork-type intelligent release device according to claim 2, 3 or 4, characterized in that: The eccentric groove (12) is a long strip structure. A positioning column (16) is connected to the slider (8). A bearing (17) is sleeved on the outside of the positioning column (16). The bearing (17) is slidably fitted in the eccentric groove (12).

6. The fork-type intelligent release device according to claim 4, characterized in that: A positioning boss (22) is provided on the outer wall of the positioning ring (14), and a positioning pin (23) extending along its axial direction is connected to the positioning boss (22). A positioning groove (24) is provided on the side wall of the inner end of the mounting tube (13), and a positioning pin hole is provided on the bottom surface of the positioning groove (24). The positioning ring (14) is fitted into the positioning groove (24) through the positioning boss (22), and the positioning pin (23) is inserted into the positioning pin hole.

7. The fork-type intelligent release device according to claim 5, characterized in that: An installation groove (25) is provided at one end of the slider (8) away from the positioning column (16), and an installation protrusion (26) is provided at the middle of one end of the shift fork (9) away from the active gear sleeve (4). The installation protrusion (26) is detachably embedded in the installation groove (25).

8. The fork-type intelligent release device according to claim 1, characterized in that: The power input shaft (2) is provided with driving external teeth on its outer wall near one end of the power output shaft (3), and a plurality of positioning external teeth are provided on its outer wall near one end of the power input shaft (2) and are distributed at intervals along the axial direction; one end of the active gear sleeve (4) is sleeved on the outside of the power input shaft (2) and meshes with the driving external teeth, and the other end is sleeved on the outside of the power input shaft (2) and is engaged with or disengaged from the positioning external teeth as the active gear sleeve (4) moves axially.

9. The fork-type intelligent release device according to claim 1 or 8, characterized in that: A planetary gear mechanism is also installed in the housing (1), the input end of the planetary gear mechanism is connected to the power output end of the control motor (5), and the output end of the planetary gear mechanism is connected to the rotary actuator (7).

10. The fork-type intelligent release device according to claim 9, characterized in that: The planetary gear mechanism comprises a sun gear (18), three planetary gears (19), a planetary carrier (20) and an outer gear ring (21), wherein the outer gear ring (21) is fixedly connected in the housing (1), the sun gear (18) is axially connected to the middle of one end of the planetary carrier (20), and the sun gear (18) is connected to the motor shaft (6) of the control motor (5), and the other end of the planetary carrier (20) is connected to the rotary actuator (7), the three planetary gears (19) are distributed in the circumferential direction and are rotatably connected to the planetary carrier (20) along their own axes, and the three planetary gears (19) are simultaneously engaged with the sun gear (18), and the three planetary gears (19) are also simultaneously engaged with the inner ring of the outer gear ring (21).

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