Modularized electric gear shifting executing mechanism assembly

Abstract

The invention relates to a modularized electric gear shifting executing mechanism assembly, which solves the problem that the existing gear shifting executing mechanism cannot simultaneously meet the gear selecting and shifting adjustment requirements of a multi-gear gearbox on X-Y and Y-Y structures, and comprises two motors which are connected at one end of a shell side by side, output shafts of the two motors extend into the shell, each output shaft is connected with a gear shifting assembly, each gear shifting assembly comprises a lead screw connected to the corresponding output shaft and a nut screwed to the corresponding lead screw, two connecting columns are symmetrically arranged on the outer wall of the corresponding lead screw nut, a U-shaped groove is formed in the upper end of the gear shifting block, and a gear shifting block is arranged in the U-shaped groove. The two ends of the U-shaped groove are hinged to the two connecting columns of the corresponding lead screw nuts respectively. A pivot shaft is arranged in the shell, the axis of the pivot shaft is perpendicular to the axis of the lead screw, and the pivot shaft is located in the shaft holes of the two gear shifting blocks. Two sets of sensor assemblies are further arranged corresponding to the two motors and used for detecting the position of the gear shifting block and transmitting position information to the motors, and the motors adjust the output torque and the rotating speed.

Description

TECHNICAL FIELD

[0001] The present application relates to shift actuators, in particular to a modular electric shift actuator assembly. BACKGROUND

[0002] As one of the important components of the gearbox, the performance and quality of the shift actuator are closely related to the user's driving experience and personal safety. At present, AMT, pure electric and other automatic shift gearboxes gradually become the mainstream of the market due to their easy operation and good economy. According to the different power sources of the shift actuator, the shift control mechanism can be divided into electric control electric, electric control hydraulic and electric control pneumatic types. Different types of power sources are suitable for vehicles in different working conditions.

[0003] The electric control electric control mechanism has many advantages such as adjustable selection / shifting force, adjustable selection / shifting stroke, small shifting impact, strong versatility and high compatibility, so it is widely used in heavy machinery that uses liquid brake and does not provide air supply for the whole vehicle. Commonly used multi-gear electric shift actuators generally use X-Y or Y-Y structure arrangement. Y-Y structure is to use two sets of two-gear actuators in parallel, and X-Y structure is to add a selection gear single machine based on two-gear actuators. The X-Y structure includes selection and shifting control actions, and the control process is relatively complex. The gear engagement action is always performed by one set of components, and the reliability is relatively poor. The Y-Y structure control is relatively simple. In a four-gear actuator, the cost of X-Y and Y-Y structures is close, and Y-Y is the preferred solution. In a six-gear or more gear actuator, the cost advantage of X-Y is significant.

[0004] The Chinese invention patent with publication number CN113775743A discloses an AMT selection and shifting actuator and a transmission. The AMT selection and shifting actuator includes a selection and shifting shaft, a shifting rocker arm, a shifting drive assembly, and a selection drive assembly. The shifting drive assembly drives the selection and shifting shaft to rotate around its axial direction through the shifting rocker arm. A sliding shift knob is installed on the selection and shifting shaft along its axial direction. The selection drive assembly includes a selection screw rod. The selection screw rod is screwed with a selection screw rod nut, and the selection screw rod nut is connected with the sliding shift knob. One end of the selection screw rod is connected with a selection motor through a selection coupling. A sealing plug is screwed on the selection screw rod, and the sealing plug is located in the recess hole of the housing. An elastic retaining ring is installed between the sealing plug and the selection coupling. The outer periphery of the sealing plug is provided with an external thread, and the recess hole is provided with an internal thread matched with the external thread. The above-mentioned invention has strong versatility, simplifies the transmission of the overall mechanism, reduces the workload in the assembly process, and reduces the assembly cost. However, it is only suitable for X-Y structure and cannot meet the selection and shifting adjustment requirements of X-Y and Y-Y structures of multi-gear transmissions. SUMMARY

[0005] The application aims at solving the problem that the existing shift actuator cannot simultaneously meet the X-Y and Y-Y structure selection and shift adjustment requirements of a multi-gear transmission, and providing a modular electric shift actuator assembly.

[0006] In order to achieve the above-mentioned application purposes, the application provides the following technical solutions:

[0007] A modular electric shift actuator assembly, characterized in that it comprises a motor, a housing, a shift assembly, a central shaft and a sensor assembly; the housing is arranged on a transmission; the motor is arranged on one end of the housing; the shift assembly is arranged on the housing; the central shaft is arranged in the housing and fixedly connected with the housing; the sensor assembly is arranged on the housing and electrically connected with the motor.

[0008] The motor is provided with two motors which are connected side by side at one end of the housing.

[0009] The shift assembly is provided with two sets, each set of the shift assembly comprises a shift knob, a lead screw and a lead screw nut; the output shaft of the motor extends into the housing and is connected with the corresponding lead screw; the lead screw nut is screwed on the corresponding lead screw, and two connecting columns are symmetrically arranged on the outer wall of the lead screw nut in the radial direction; a U-shaped groove is formed in the upper end of the shift knob, and the two ends of the U-shaped groove are hingedly connected with the two connecting columns of the corresponding lead screw nut.

[0010] The central shaft is arranged in the housing and fixedly connected with the housing, the axis direction of the central shaft is perpendicular to the axis direction of the lead screw, and an axle hole is arranged in the middle of each of the two shift knobs; the central shaft is located in the axle hole, so that the shift knob can rotate around the central shaft.

[0011] The sensor assembly is provided with two sets, and the two sets of sensor assemblies are respectively arranged corresponding to the two motors; each set of the sensor assembly is electrically connected with the corresponding motor; the sensor assembly is used for detecting the position of the shift knob and transmitting the position information to the motor; the motor adjusts the output torque and rotating speed according to the position information and the shift signal.

[0012] Further, the sensor assembly comprises a magnet assembly arranged on the corresponding lead screw nut and a displacement sensor arranged on the housing; the output end of the displacement sensor is electrically connected with the integrated controller of the corresponding motor; the displacement sensor indirectly judges the position of the shift knob by measuring the relative position between the displacement sensor and the magnet assembly.

[0013] Further, the magnet assembly comprises a base and a magnet arranged on the base; the base is connected with the lead screw nut through bolts, and the lead screw nut and the base are both provided with a positioning pin hole in which a positioning pin is inserted; the displacement sensor indirectly judges the position of the shift knob by measuring the relative position between the displacement sensor and the magnet.

[0014] Further, a blind hole for mounting the central shaft is formed in the inner wall of the housing; one end of the central shaft extends into the blind hole, and the central shaft is gap-fitted with the blind hole.

[0015] One end of the central shaft is provided with a first mounting hole in the radial direction, a threaded hole is arranged on the shell corresponding to the first mounting hole, a set screw is screwed into the threaded hole, one end of the set screw is located in the first mounting hole and fits with the first mounting hole with a gap, and the one end of the central shaft is fixed in the blind hole; the gap between the central shaft and the blind hole of the shell is smaller than the gap between the set screw and the first mounting hole.

[0016] The other end of the central shaft is provided with a second threaded hole in the axial direction and located in the through hole arranged on the shell, a threaded hole is arranged on the shell corresponding to the position of the through hole, and a plug is screwed into the threaded hole.

[0017] Further, the motor and the shell are connected by bolts, and a sealing ring is sleeved on the outer edge of the connecting lip of the motor; a sealing gasket is arranged at the connecting end surface of the shell and the motor.

[0018] Further, the shell is provided with a vent hole at the top, and a vent plug is screwed into the vent hole.

[0019] Further, the shell is provided with mounting holes at four corners for fixing the shell on the gearbox, and two positioning sleeves are diagonally arranged at the bottom of the shell for cooperating with the positioning holes of the cover of the gearbox, each positioning sleeve is located in the mounting hole and fits with the mounting hole with an interference fit.

[0020] Further, a shaft sleeve is arranged between the central shaft and the shaft hole of the shift knob.

[0021] A modular electric gear shifting actuator assembly, characterized in that it comprises a motor, a shell, a gear shifting assembly, a central shaft and a sensor assembly; the shell is arranged on the gearbox;

[0022] The motor is provided with two, and the two motors are connected to the two adjacent sides of the shell respectively;

[0023] The gear shifting assembly is provided with two sets, each set of gear shifting assembly comprises a shift knob, a lead screw and a lead screw nut; the output shaft of the motor extends into the shell and is connected with the corresponding lead screw, the output shafts of the two motors are perpendicular to each other; the lead screw nut is screwed on the corresponding lead screw, two connecting columns are symmetrically arranged on the outer wall of the lead screw nut in the radial direction; the U-shaped groove is arranged on the upper end of the shift knob, and the two ends of the U-shaped groove are respectively hinged with the two connecting columns of the corresponding lead screw nut;

[0024] The central shafts are provided with two, and the two central shafts are arranged in the shell and fixedly connected with the shell, the shaft holes are arranged in the middle of the two shift knobs, the two central shafts are located in the shaft holes of the two shift knobs respectively, so that the shift knob can rotate around the corresponding central shaft, and the axial directions of the two central shafts are perpendicular to the axial directions of the corresponding lead screws respectively;

[0025] The sensor assembly is provided with two sets, and the two sets of sensor assemblies correspond to the two motors respectively, each set of sensor assembly is electrically connected with the corresponding motor, the sensor assembly is used for detecting the position of the shift knob and transmitting the position information to the motor, and the motor adjusts the output torque and rotating speed according to the position information and the shift signal.

[0026] Further, the control plate arranged below the two shift knobs is further included, two recesses are arranged on the control plate, the bottom ends of the two shift knobs are arranged in the corresponding recesses respectively, and the extension directions of the recesses are the same as the axial directions of the central shafts connected to the corresponding shift knobs;

[0027] The control plate is provided with a lug and a plurality of gear position guide blocks, a guide groove matched with the lug is arranged on each gear position guide block, and the guide grooves of the plurality of gear position guide blocks are spliced to form a sliding groove for the lug to slide; and the plurality of gear position guide blocks are arranged in the gearbox.

[0028] Compared with the prior art, the beneficial effects of the present application are:

[0029] (1) The modular electric shift execution mechanism assembly provided by the present application includes two arrangement modes, one is suitable for Y-Y structure gear selection and shift adjustment, which includes a motor, two motors are arranged side by side at one end of the shell, the output ends of the two motors are arranged in the shell and connected with a set of shift assembly respectively, the central shaft with the axial direction perpendicular to the lead screw is arranged in the shell, when the motor drives the lead screw to rotate, the shift knob rotates around the central shaft, thereby realizing gear shifting, the position of the shift knob is detected by the sensor assembly and the position information is transmitted to the motor, and the motor adjusts the output torque and rotating speed according to the position information and the shift signal. The other is suitable for X-Y structure gear selection and shift adjustment, which is different from the Y-Y structure, the two motors are connected on the adjacent sides of the shell and the output shafts of the two motors are perpendicular to each other, through the above two structure forms, the gear selection and shift adjustment requirements of X-Y and Y-Y structures of multi-gearboxes can be met, and most of the parts of the two structure forms can be used universally, thereby saving the manufacturing cost.

[0030] (2) The sensor assembly of the modular electric gear shifting actuator assembly comprises a magnet assembly arranged on the screw nut and a displacement sensor arranged on the shell, the displacement sensor indirectly judges the position of the gear shifting knob by measuring the relative position between the displacement sensor and the magnet assembly, the structure is simple, and the position measurement difficulty is simplified.

[0031] (3) One end of the central shaft of the modular electric gear shifting actuator assembly is located in a blind hole formed in the shell and gap-fitted with the blind hole; a first mounting hole is formed in the radial direction at one end of the central shaft, a threaded hole is arranged on the shell corresponding to the first mounting hole, a clamping screw is screwed in the threaded hole, one end of the clamping screw is located in the first mounting hole and gap-fitted with the first mounting hole, one end of the central shaft is fixed in the blind hole, and the gap between the central shaft and the blind hole on the shell is smaller than the gap between the clamping screw and the first mounting hole. The situation that the clamping screw may be broken is that the gap between the central shaft and the blind hole is too large, and the gap between the first mounting hole on the central shaft and the screw is too small, so that the lateral force generated when the central shaft works is all applied to the clamping screw and the clamping screw is broken; therefore, the gap between the central shaft and the blind hole on the shell is smaller than the gap between the clamping screw and the first mounting hole, so that the lateral force generated when the central shaft works is applied to the blind hole, and the risk of clamping screw breakage is reduced.

[0032] (4) The modular electric gear shifting actuator assembly is provided with a vent hole in the top of the shell, and a vent plug is screwed in the vent hole. The vent hole can be used to balance the internal pressure of the shell and prevent problems such as lubricating oil leakage caused by high temperature and high pressure environment in the closed working of the shell. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a perspective structural schematic view of the first embodiment of the modular electric gear shifting actuator assembly of the application;

[0034] Figure 2 It is a top view of the first embodiment of the application;

[0035] Figure 3 It is a Y-Y direction partial sectional view of Figure 2

[0036] Figure 4 It is an X-X direction sectional view of Figure 2

[0037] Figure 5 It is a force analysis diagram of the gear shifting knob and the screw nut in the first embodiment of the application;

[0038] Figure 6 It is a force analysis diagram of the gear shifting knob and the central shaft in the first embodiment of the application;

[0039] ​​Figure 7 Figure 1 is a schematic diagram of the cooperation of the motor, screw rod, screw nut, sensor assembly and shift knob in the first embodiment of the present application;

[0040] Figure 8 Figure 2 is a sectional view of the magnet assembly in the first embodiment of the present application;

[0041] Figure 9 Figure 3 is a schematic diagram of the three-dimensional structure of the second embodiment of the modular electric shift actuator assembly of the present application (without showing the shell);

[0042] Figure 10 Figure 4 is a schematic diagram of the three-dimensional structure of the control board in the second embodiment of the present application; Figure 1

[0043] Figure 11 Figure 5 is a schematic diagram of the three-dimensional structure of the control board in the second embodiment of the present application; Figure 2

[0044] The reference signs are explained as follows:

[0045] 1 - motor, 2 - shell, 3 - shift knob, 4 - screw rod, 41 - connecting shaft; 5 - screw nut, 51 - connecting column; 6 - central shaft, 7 - displacement sensor, 8 - magnet assembly, 81 - base, 82 - magnet; 9 - thrust bearing, 10 - sliding bearing, 11 - sealing ring, 12 - sealing gasket, 13 - air vent plug, 14 - set screw, 15 - plug, 16 - positioning sleeve, 17 - shaft sleeve, 18 - control board, 181 - protrusion, 182 - weight-reducing hole; 19 - gear position guide block. DETAILED DESCRIPTION

[0046] The present application is further described below in conjunction with the drawings and exemplary embodiments.

[0047] Embodiment I

[0048] With reference to Figures 1-8 , the first embodiment of the modular electric shift actuator assembly of the present application is suitable for a gearbox with Y-Y structure for gear selection and adjustment, which comprises a shell 2, and the structure of the shell 2 is as follows Figure 1 ​​As shown, it is a cuboid structure, a vent hole is formed at the top, and a vent plug 13 is screwed in the vent hole. The vent hole can be used to balance the air pressure inside the shell 2, to prevent the high temperature and high pressure environment inside the shell 2 from causing lubricating oil leakage and other problems when the closed work is prevented. Four mounting holes are provided at the four corners of the shell 2, because the entire shell 2 is to be installed on the upper cover of the transmission case, bolts are provided in the mounting holes, which can be used for the connection of the shell 2 and the upper cover of the transmission case. In order to ensure the positioning accuracy of the shell 2 during installation, positioning sleeves 16 are provided at the bottom of the shell 2. The positioning sleeves 16 are diagonally arranged in two. In order to simplify the connection difficulty, the positioning sleeves 16 are located in the mounting holes and are in interference fit with the mounting holes. In this way, during the installation of the shell 2, the positioning sleeves 16 are matched with the positioning holes of the upper cover of the transmission case to achieve precise positioning, which is simple in structure and convenient to operate.

[0049] Two motors 1 are connected side by side by bolts at one end of the shell 2. In order to prevent the lubricating oil inside the shell 2 from seeping out from the connecting end face of the motor 1, a sealing ring 11 is provided around the connecting rim of the motor 1, and a sealing gasket 12 is provided at the connecting end face of the motor 1 and the shell 2. In this way, the sealing of the shell 2 is ensured by the protection of the two layers of sealing elements.

[0050] The output shaft of each motor 1 extends into the shell 2, and a corresponding lead screw 4 is connected to the output shaft of the motor 1. However, in this way, the lead screw 4 is only connected to the output shaft of the motor 1 at one end, and the other end is suspended, which is not stable. Therefore, a connecting shaft 41 is coaxially provided at the end of the lead screw 4 away from the output shaft of the motor 1. The connecting shaft 41 is a straight shaft, and its outer diameter is smaller than that of the lead screw 4. A ring groove is formed on the inner wall of the shell 2, and a thrust bearing 9 is installed in the ring groove. The connecting shaft 41 is rotatably connected to the thrust bearing 9. The outer side surface of the thrust bearing 9 abuts against the end surface of the lead screw 4. A blind hole is formed in the center of the bottom of the ring groove, and a sliding bearing 10 is provided in the blind hole. Part of the connecting shaft 41 is located in the blind hole and cooperates with the sliding bearing 10. In this way, both ends of the lead screw 4 are supported, and it is more stable during rotation. In this embodiment, the lead screw 4 and the lead screw nut 5 are selected as ball screws and ball screw nuts. Because the lead screw 4 and the lead screw nut 5 of this structure are more smooth during rotation, they can prevent the gear shifting from being jerky.

[0051] The lead screw nut 5 is screwed onto the lead screw 4. Two connecting posts 51 are symmetrically arranged radially on its outer wall. A U-shaped groove is formed at the upper end of the shift head 3, and the two ends of the U-shaped groove are hinged to the two connecting posts 51 of the corresponding lead screw nut 5. A shaft hole is formed in the middle of each of the two shift heads 3, and a central shaft 6 is located in the shaft hole, allowing the shift head 3 to rotate around the central shaft 6. The axis of the central shaft 6 is perpendicular to the axis of the lead screw 4. The central shaft 6 provides a fulcrum for the rotation of the two shift heads 3; therefore, it is necessary to prevent wear between them. A bushing 17 is provided between the central shaft 6 and the shaft hole of the shift head 3. The bushing 17 is generally made of a soft metal such as copper to reduce friction.

[0052] The central shaft 6 is located inside the housing 2 and also needs to provide a fulcrum for the rotation of the two shift knobs 3. Therefore, its position must be fixed and it cannot be easily rotated. Thus, the central shaft 6 needs to be connected to the housing 2 to fix the position of the central shaft 6.

[0053] according to Figure 5 , Figure 6 From the force analysis diagram, we can see that the lead of the lead screw 4 is P, the pitch circle diameter is D, and the motor output torque is M. When the lead screw 4 rotates one revolution, the axial displacement of the balls in the lead screw nut 5 is equal to the lead of the lead screw 4, both being P. The circumferential displacement of the balls is πD. Therefore, the normal force on the balls is M / (D / 2), and the axial force on the lead screw nut 5 is F1.

[0054] Then we have: F1*P=M / (D / 2)*πD

[0055] The result is F1 = M * 2π / P;

[0056] The distance from the center of the central shaft 6 to the center of the lead screw nut 5 is H1, the distance from the center of the central shaft 6 to the contact point between the shift knob 3 and the shift assembly is H2, and the shifting force of the shift knob 3 is F2.

[0057] Therefore, F1*H1=F2*H2

[0058] The result is F2 = F1 * H1 / H2;

[0059] If the lower end of the shift knob 3 is fixed, the shift knob 3 will be subjected to a force F2' which is equal in magnitude and opposite in direction to the shift force F2. The forces F1 and F2' will generate a resultant force F3 at the position of the central shaft 6, and F3=F1+F2'. The friction generated when the shift knob 3 rotates around the central shaft 6 is extremely small, and the torque will not cause the tightening screw 14 to break. The possible breaking of the screw is that the gap between the central shaft 6 and the housing 2 is too large, and the gap between the central shaft 6 and the tightening screw 14 is too small, so that the lateral force F3 generated when the central shaft 6 works is entirely applied to the tightening screw 14, causing the tightening screw 14 to break. A first mounting hole is formed in the radial direction at one end of the central shaft 6, a threaded hole is formed in the housing 2 corresponding to the first mounting hole, and the tightening screw 14 is screwed into the threaded hole. One end of the tightening screw 14 is located in the first mounting hole and is in clearance fit with the first mounting hole, fixing one end of the central shaft 6 in the blind hole. The gap between the central shaft 6 and the blind hole in the housing 2 is smaller than the gap between the tightening screw 14 and the first mounting hole, so that the lateral force F3 generated when the central shaft 6 works is applied to the blind hole, reducing the risk of breaking the tightening screw 14. A second threaded hole is formed in the axial direction at the other end of the central shaft 6 and is located in the through hole formed in the housing 2. A threaded hole is formed in the housing 2 corresponding to the position of the through hole, and the plug 15 is screwed into the threaded hole.

[0060] The second threaded hole is used to disassemble and assemble the central shaft 6. When assembling or disassembling, the bolt or threaded tool can be twisted into the second threaded hole, so that the central shaft 6 can be moved or rotated, thereby ensuring that the first mounting hole of the central shaft 6 is aligned with the corresponding threaded hole in the housing 2, making the assembly more convenient. When disassembling, the tightening screw 14 is removed first, the bolt or threaded tool is twisted into the second threaded hole, and the central shaft 6 is pulled out, and the disassembly is completed. The plug 15 is screwed into the threaded hole formed in the housing 2 corresponding to the position of the through hole. The plug 15 has a certain gap with the central shaft 6. The tightening screw 14 can limit the axial movement and rotation of the central shaft 6, and the plug 15 is used to seal the through hole after the central shaft 6 is assembled.

[0061] To monitor whether the shift knob 3 has moved to the corresponding gear position, a sensor assembly is also provided. Two sets of sensor assemblies are provided, each corresponding to one of the two motors 1. Each set of sensor assemblies includes a displacement sensor 7 and a magnet assembly 8. The displacement sensor 7 is mounted on the housing 2, and the magnet assembly 8 is mounted on the lead screw nut 5. In this embodiment, the displacement sensor 7 is a non-contact wire-spinning sensor. The displacement sensor 7 indirectly determines the position of the shift knob 3 by measuring its relative position with the magnet assembly 8. The output terminal of the displacement sensor 7 is electrically connected to the integrated controller on the motor 1. The displacement sensor 7 transmits the detected position information to the motor 1, and the motor 1 adjusts the output torque and speed according to the position information and the shift signal. The magnet assembly 8 includes a base 81 and a magnet 82 mounted on the base 81. Since the displacement sensor 7 mainly detects the position of the magnet 82 to determine the position of the shift head 3, the position of the magnet 82 must be accurate. To ensure the accuracy of the magnet 82, locating pin holes are provided on both the base 81 and the lead screw nut 5, and locating pins are inserted into the locating pin holes to ensure the positional accuracy of the base 81. Then, the base 81 and the lead screw nut 5 are connected by bolts. In this way, the positional accuracy of the magnet 82 mounted on the base 81 is guaranteed, and the displacement sensor 7 can indirectly determine the position of the shift head 3 by measuring its relative position with the magnet 82.

[0062] Example 2

[0063] A second embodiment of the modular electric shift actuator assembly of the present invention is as follows: Figures 9-11 As shown, this is applicable to a gearbox with XY structure gear shift adjustment. Unlike Embodiment 1, in Embodiment 2, the two motors 1 are connected to two adjacent sides of the housing 2, which is mounted on the gearbox's top cover. The connection method of the motors 1 and the sealing method of the connection end faces between the motors 1 and the housing 2 are the same as in Embodiment 1, and will not be repeated here. The output shafts of the two motors 1 extend into the housing 2 and are connected to the corresponding lead screws 4. The axes of the output shafts of the two motors 1 are perpendicular to each other. A lead screw nut 5 is screwed onto the lead screw 4. Two connecting posts 51 are symmetrically arranged radially on the outer wall of the lead screw nut 5. A U-shaped groove is provided at the upper end of the shift head 3, and the two ends of the U-shaped groove are hinged to the two connecting posts 51 of the corresponding lead screw nut 5. Because the two shift heads 3 are in different positions, two central shafts 6 are also provided, and both central shafts 6 are located inside the housing 2 and fixedly connected to it. The connection method between the central shafts 6 and the housing 2 is the same as in Embodiment 1, and will not be repeated here. A shaft hole is provided in the middle of each of the two shift heads 3, and two central shafts 6 are respectively located in the shaft holes of the two shift heads 3, so that the shift heads 3 can rotate around the corresponding central shafts 6; and the axial directions of the two central shafts 6 are perpendicular to the axial direction of the corresponding lead screw 4.

[0064] In order to detect the position of the shift knob 3, two sets of sensor assemblies are also provided in Embodiment 2. The two sets of sensor assemblies are respectively set for two motors 1. Each set of sensor assemblies is electrically connected to the corresponding motor 1. The sensor assemblies are the same as those in Embodiment 1. The specific composition and structure will not be described again. The output terminal of the displacement sensor 7 in the sensor assembly is electrically connected to the integrated controller on the motor 1. The sensor assembly will detect the position of the shift knob 3 and transmit the position information to the motor 1. The motor 1 adjusts the output torque and speed according to the position information and the shift signal.

[0065] Because it is a gearbox suitable for XY structure gear selection and shifting adjustment, one set of the two shifting components connected to the two motors is used for gear selection and the other for shifting. A control plate 18 is provided below the two shift paddles 3, and two grooves are opened on the control plate 18. The bottom ends of the two shift paddles 3 are respectively located in the corresponding grooves, and the extension direction of the grooves is the same as the axis of the central shaft 6 connected to the shift paddles 3 in the grooves. At the bottom of the control plate 18, there are protrusions 181 and multiple gear guide blocks 19. Each of the multiple gear guide blocks 19 has a guide groove that matches the protrusion 181, and all gear guide blocks 19 are located inside the gearbox. When the torque of motor 1 in the selected gear direction is applied to the corresponding shift head 3 via a ball screw, the shift head 3 rotates, causing its bottom end to push against the sidewall of the groove, thus moving the control plate 18 along the selected gear direction. This causes the protrusion 181 at the bottom of the control plate 18 to slide along the groove formed by the splicing of multiple gear guide blocks 19. After selecting the target gear guide block 19, motor 1 in the selected gear direction stops, and the protrusion 181 is located in the guide groove of the target gear guide block 19. The torque of motor 1 in the shift direction is applied to the corresponding shift head 3 via a ball screw, causing the shift head 3 to rotate. This causes its bottom end to push against the sidewall of the groove, thus moving the control plate 18 along the shift direction. This causes the protrusion 181 at the bottom of the control plate 18 to push the target gear guide block 19, completing the gear selection / shifting action. To make the movement of the control block 18 more flexible, such as... Figure 10 , 11 As shown, a weight reduction hole 182 is also provided on the control panel 18 to reduce the force required for shifting gears.

[0066] The embodiments described above are merely illustrative of specific implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A modular electric shift actuator assembly, characterized in that, It includes a motor (1), a housing (2), a shift assembly, a central shaft (6), and a sensor assembly; the housing (2) is used to mount the gearbox; There are two motors (1), which are connected side by side to one end of the housing (2); Two sets of the shift assembly are provided. Each set of the shift assembly includes a shift head (3), a lead screw (4) and a lead screw nut (5). The output shaft of the motor (1) extends into the housing (2) and is connected to the corresponding lead screw (4). The lead screw nut (5) is screwed onto the corresponding lead screw (4). Two connecting posts (51) are symmetrically arranged in the radial direction on the outer wall of the lead screw nut (5). The shift head (3) has a U-shaped groove at its upper end. The two ends of the U-shaped groove are respectively hinged to the two connecting posts (51) of the corresponding lead screw nut (5). The central shaft (6) is set inside the housing (2) and fixedly connected to the housing (2). The axis of the central shaft (6) is perpendicular to the axis of the lead screw (4). A shaft hole is provided in the middle of the two shift heads (3). The central shaft (6) is located in the shaft hole, so that the shift heads (3) can rotate around the central shaft (6). The sensor assembly is provided in two sets, and the two sets of sensor assemblies are respectively set for two motors (1). Each set of sensor assemblies is electrically connected to the corresponding motor (1). The sensor assembly is used to detect the position of the shift head (3) and transmit the position information to the motor (1). The motor (1) adjusts the output torque and speed according to the position information and the shift signal.

2. The modular electric shift actuator assembly according to claim 1, characterized in that: The sensor assembly includes a magnet assembly (8) mounted on the corresponding lead screw nut (5) and a displacement sensor (7) mounted on the housing (2). The output of the displacement sensor (7) is electrically connected to the integrated controller of the corresponding motor (1). The displacement sensor (7) indirectly determines the position of the shift head (3) by measuring its relative position with the magnet assembly (8).

3. The modular electric shift actuator assembly according to claim 2, characterized in that: The magnet assembly (8) includes a base (81) and a magnet (82) disposed on the base (81). The base (81) is connected to the lead screw nut (5) by bolts. Both the lead screw nut (5) and the base (81) are provided with positioning pin holes, and positioning pins are inserted into the positioning pin holes. The displacement sensor (7) indirectly determines the position of the shift head (3) by measuring its relative position with the magnet (82).

4. The modular electric shift actuator assembly according to any one of claims 1-3, characterized in that: The inner wall of the housing (2) is provided with a blind hole for installing the central shaft (6), one end of the central shaft (6) extends into the blind hole, and the central shaft (6) is clearance-fitted with the blind hole; One end of the central shaft (6) is provided with a first mounting hole in the radial direction. A threaded hole is provided on the housing (2) corresponding to the first mounting hole. A set screw (14) is screwed into the threaded hole. One end of the set screw (14) is located in the first mounting hole and is clearance-fitted with the first mounting hole, thereby fixing one end of the central shaft (6) in the blind hole. The gap between the central shaft (6) and the blind hole on the housing (2) is smaller than the gap between the set screw (14) and the first mounting hole. The other end of the central shaft (6) has a second threaded hole along the axial direction and is located in the through hole opened on the housing (2). The housing (2) has a threaded hole corresponding to the position of the through hole, and a screw plug (15) is screwed into the threaded hole.

5. The modular electric shift actuator assembly according to claim 4, characterized in that: The motor (1) is connected to the housing (2) by bolts, and a sealing ring (11) is fitted on the outer edge of the connection stop of the motor (1); a sealing gasket (12) is provided at the connection end face of the housing (2) and the motor (1).

6. The modular electric shift actuator assembly according to claim 5, characterized in that: The top of the housing (2) is provided with a vent hole, and a vent plug (13) is screwed into the vent hole.

7. The modular electric shift actuator assembly according to claim 8, characterized in that: The housing (2) has mounting holes at all four corners for fixing the housing (2) to the gearbox. Two positioning sleeves (16) are provided diagonally at the bottom of the housing (2) for engaging with the positioning holes of the gearbox cover. Each positioning sleeve (16) is located inside the mounting hole and is interference-fitted with the mounting hole.

8. The modular electric shift actuator assembly according to claim 9, characterized in that: A bushing (17) is provided between the pivot shaft (6) and the shaft hole of the shift head (3).

9. A modular electric shift actuator assembly, characterized in that, It includes a motor (1), a housing (2), a shift assembly, a central shaft (6), and a sensor assembly; the housing (2) is used to mount the gearbox; There are two motors (1), and the two motors (1) are respectively connected to two adjacent sides of the housing (2); The shifting assembly is provided in two sets. Each set of shifting assembly includes a shifting head (3), a lead screw (4) and a lead screw nut (5). The output shaft of the motor (1) extends into the housing (2) and is connected to the corresponding lead screw (4). The output shaft axes of the two motors (1) are perpendicular to each other. The lead screw nut (5) is screwed onto the corresponding lead screw (4). Two connecting posts (51) are symmetrically arranged in the radial direction on the outer wall of the lead screw nut (5). The shifting head (3) has a U-shaped groove at its upper end. The two ends of the U-shaped groove are respectively hinged to the two connecting posts (51) of the corresponding lead screw nut (5). Two central shafts (6) are provided, and both central shafts (6) are located inside the housing (2) and fixedly connected to the housing (2). A shaft hole is provided in the middle of the two shift heads (3). The two central shafts (6) are respectively located in the shaft holes of the two shift heads (3), so that the shift heads (3) can rotate around the corresponding central shafts (6); and the axial direction of the two central shafts (6) is perpendicular to the axial direction of the corresponding lead screw (4). The sensor assembly is provided in two sets, and the two sets of sensor assemblies are respectively set for two motors (1). Each set of sensor assemblies is electrically connected to the corresponding motor (1). The sensor assembly is used to detect the position of the shift head (3) and transmit the position information to the motor (1). The motor (1) adjusts the output torque and speed according to the position information and the shift signal.

10. The modular electric shift actuator assembly according to claim 9, characterized in that: It also includes a control plate (18) set below the two shift paddles (3), the control plate (18) has two grooves, the bottom ends of the two shift paddles (3) are respectively in the corresponding grooves, and the extension direction of the grooves is the same as the axis direction of the central shaft (6) connected to the corresponding shift paddles (3). The bottom of the control panel (18) is provided with a protrusion (181) and multiple gear guide blocks (19). Each gear guide block (19) has a guide groove that matches the protrusion (181), and the guide grooves of the multiple gear guide blocks (19) are spliced ​​together to form a sliding groove for the protrusion (181) to slide. The multiple gear guide blocks (19) are located inside the gearbox.

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