Worm and gear parallel electric control electric gear shifting executing mechanism assembly

Abstract

The utility model relates to a gear shifting executing mechanism, in particular to a worm and gear parallel electric control electric gear shifting executing mechanism assembly which solves the problems that an existing electric control electric gear shifting executing mechanism is large in machining difficulty and high in cost, and the whole executing mechanism is large in occupied space and complex in structure. The gear shifting mechanism comprises two gear shifting motors which are connected to one side of a shell side by side, an output shaft of each gear shifting motor extends into the shell and is connected with a worm, a worm gear of a fan-shaped structure is arranged above the worm, the worm gears are meshed with the worm, the worm gears are rotationally installed on worm gear shafts, the outer ends of shifting pins arranged on the worm gears are located in U-shaped grooves in the upper portions of shifting blocks, and the shifting blocks are connected with the worm gears. The position of the shifting block is detected through the sensor assembly, the position of the shifting block is adjusted through the gear shifting motor according to position information transmitted by the sensor assembly, the overall structure is simple, the worm gear of a fan-shaped structure is adopted, the installation space is saved, and the whole assembly structure is more compact.

Description

Technical Field

[0001] The utility model relates to a gear shifting actuator, in particular to a worm gear parallel electric-controlled electric gear shifting actuator assembly. Background Art

[0002] Nowadays, in the field of commercial vehicles, automatic shifting transmissions such as AMT and pure electric transmissions have gradually become the mainstream of the market due to their easy operation and good economic performance. Most of the shifting actuators in these transmissions are electric-controlled pneumatic shifting actuators. Because of their simple structure, reliable life and low cost, they have long dominated the market of automatic shifting transmissions for commercial vehicles. However, the pace of pure electrification in the commercial vehicle market is accelerating. Electric vehicle platforms are usually air-free platforms. Traditional electric-controlled pneumatic shifting actuators cannot work properly under this platform. Therefore, the market demand for electric-controlled electric shifting actuators has expanded accordingly. In addition, electric-controlled electric shifting actuators have many advantages such as adjustable selection / shifting force, adjustable selection / shifting travel, small shifting impact, strong versatility and high compatibility. Therefore, the development of electric-controlled electric shifting actuators has broad market prospects.

[0003] The Chinese invention patent with application publication number CN117759654A discloses a new type of electrically controlled electric clutch actuator, including a motor, a front housing, an intermediate housing and a rear housing. The motor is installed on one side of the front housing by bolts; a first gear and a second gear meshing with each other are provided between the intermediate housing and the rear housing, and the first gear is limited between the intermediate housing and the rear housing by a housing pin. The installation specifications use the specifications commonly available in the market, with high applicability. It uses a DC motor control to solve the problem that the pneumatic system is difficult to accurately control the clutch operation due to the small stiffness of the gas. No additional air pressure pump, hydraulic pump and other components are required, avoiding environmental pollution caused by system leakage.

[0004] However, the above-mentioned electronically controlled electric clutch actuator adopts a ball screw pair to realize the engagement and disengagement of the clutch. Although the ball screw has high precision and excellent performance, it is difficult and costly to process, and the entire actuator occupies a large space and has a complex structure. Utility Model Content

[0005] The utility model aims to solve the technical problems that the existing electronically controlled electric shift actuators are difficult to process, costly, and the entire actuator occupies a large space and has a complex structure, and to provide a worm gear parallel electronically controlled electric shift actuator assembly.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A worm gear parallel electric control electric shift actuator assembly, which is special in that it includes a shift motor, a housing, a transmission assembly, and a sensor assembly, wherein the housing is used to be arranged on a gearbox;

[0008] There are two shift motors, which are fixed side by side on one side of the housing;

[0009] The transmission assembly is provided with two sets, each set of the transmission assembly includes a shift head, a worm wheel and a worm; the output shaft of the shift motor extends into the housing and is connected to the corresponding worm, the worm wheel is located above the worm and meshes with the worm, a center hole is opened at the axis position of the two worm wheels, a worm wheel shaft is provided in the housing, the axis direction of the worm wheel shaft is perpendicular to the worm, the worm wheel shaft is located in the center hole, so that the worm wheel can rotate around the worm wheel shaft;

[0010] The middle of the two dial heads are provided with shaft holes, and a rotating shaft is arranged in the housing, the axis of the rotating shaft is perpendicular to the worm, and the rotating shaft is located below the worm, and the rotating shaft is located in the shaft hole;

[0011] The worm wheel is a fan-shaped structure, and a pull pin is arranged on the worm wheel along the axial direction. The pull pin is located on the peripheral side of the center hole, and the line connecting the axis of the pull pin and the center of the center hole is located on the mid-plane of the worm wheel; a U-shaped groove is opened on the upper part of the pull head, and the outer end of the pull pin is located in the U-shaped groove, which is used to pull the pull head to rotate around the rotation axis;

[0012] The sensor assembly is provided with two sets, and is respectively provided for two shift motors. The sensor assembly is electrically connected to the corresponding shift motor. The sensor assembly is used to detect the position of the shift head and transmit the position information to the shift motor. The shift motor adjusts the position of the shift head according to the position information.

[0013] Furthermore, two shifting heads are arranged between two worm gears, a first spacer is arranged between the shifting heads and the corresponding worm gears, and the first spacer is sleeved on the shifting pin;

[0014] A spacer sleeve is sleeved on the rotating shaft, one end of the spacer sleeve abuts against one dial head, and the other end of the spacer sleeve abuts against another dial head;

[0015] A second spacer is arranged between the worm wheel and the inner wall of the shell, and the second spacer is sleeved on the worm wheel shaft.

[0016] Furthermore, the sensor assembly includes a displacement sensor and a magnet. The displacement sensor is arranged on the housing, and the magnet is arranged on the top of the worm gear. The displacement sensor is electrically connected to the shift motor. The displacement sensor determines the rotation position of the worm gear by measuring the relative position between the displacement sensor and the magnet, and then determines the position of the dial head through the rotation position of the worm gear, and transmits the position information of the dial head to the corresponding shift motor. The shift motor adjusts the position of the dial head according to the position information.

[0017] Further, a first blind hole is formed on an inner wall of one side of the shell, and one end of the rotating shaft is located in the first blind hole; a first through hole is formed on an inner wall of the shell on the other side opposite to the first blind hole, and the other end of the rotating shaft is located in the first through hole and is loosely matched with the first through hole; a first fixing hole is formed radially on the rotating shaft corresponding to the position of the first through hole; a first threaded hole is provided on the shell corresponding to the first fixing hole; a fastening screw is screwed into the first threaded hole, and one end of the fastening screw is located in the first fixing hole and is loosely matched with the first fixing hole; the gap between the rotating shaft and the first through hole is smaller than the gap between the fastening screw and the first fixing hole;

[0018] One end of the rotating shaft is located in the first through hole, and a second threaded hole is opened in the axial direction at the end of the rotating shaft. A third threaded hole is arranged on the housing corresponding to the position of the first through hole, and a first screw plug is screwed into the third threaded hole.

[0019] A second shaft sleeve is arranged between the rotating shaft and the shaft hole. The second shaft sleeve is arranged in the shaft hole. The dial head is sleeved on the rotating shaft through the second shaft sleeve.

[0020] Furthermore, a vent hole is provided on the top of the shell, and a vent plug is screwed into the vent hole.

[0021] Furthermore, a second blind hole is opened on the inner wall of the shell, and a support shaft is provided at the end of the worm that is not connected to the output shaft of the shift motor. The support shaft is located in the second blind hole, and a first sleeve is provided between the second blind hole and the support shaft, and the first sleeve is sleeved on the support shaft.

[0022] Furthermore, a slot is provided on the inner wall of the shell corresponding to the position of the second blind hole, and an end needle roller bearing is arranged in the slot and sleeved on the support shaft. One end of the end needle roller bearing abuts against the bottom of the slot, and the other end abuts against the boss arranged on the worm.

[0023] Furthermore, a third blind hole is opened on the inner wall of one side of the shell, and one end of the worm gear shaft is located in the third blind hole; a second through hole is opened on the inner wall of the shell on the other side opposite to the third blind hole, and the other end of the worm gear shaft is located in the second through hole, and a fourth threaded hole is provided on the shell corresponding to the second through hole, and a second screw plug is screwed into the fourth threaded hole, and the inner end surface of the second screw plug abuts against the worm gear shaft.

[0024] Furthermore, sealing gaskets are arranged between the tails of the first screw plug, the second screw plug and the housing; and a liner is arranged between the shift motor and the housing.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] (1) The utility model provides a worm gear parallel electric control electric shift actuator assembly including two shift motors connected side by side on one side of a housing, the output shafts of the two shift motors both extend into the housing and a worm is connected to each output shaft, a worm wheel with a fan-shaped structure is arranged above the worm, and the worm wheel and the worm are meshed for transmission, a center hole is opened at the center position of the two worm wheels, the worm wheels are rotatably mounted on the worm wheel shaft through the center hole, an axial hole is opened in the middle of two shift heads, the shift heads are rotatably mounted on the rotating shaft through the axial hole, a U-shaped groove is opened at the upper part of the shift head, the shift heads are rotated around the rotating shaft by a shift pin arranged on the worm wheel, and the position of the shift heads is detected by a sensor assembly, and the shift motor adjusts the position of the shift head according to the position information, the overall structure is simple, and the fan-shaped worm wheel is adopted, compared with the traditional circular worm wheel, the required installation height of the worm wheel is greatly reduced, saving installation space, making the entire assembly structure more compact, and convenient for arranging other parts.

[0027] (2) The utility model provides a worm gear parallel electric control electric shift actuator assembly, in which the rotating shaft and the first through hole are gap-matched, and one end of the fastening screw is located in the first fixing hole and is gap-matched with the first fixing hole, and the gap between the rotating shaft and the first through hole is smaller than the gap between the fastening screw and the first fixing hole. The fastening screw may break if the gap between the rotating shaft and the first through hole is too large, while the gap between the fastening screw and the first fixing hole is too small, resulting in the horizontal force on the rotating shaft during operation acting entirely on the fastening screw, causing it to break. Therefore, in the utility model, the gap between the rotating shaft and the first through hole is smaller than the gap between the fastening screw and the first fixing hole, so that the horizontal force on the rotating shaft acts entirely on the first through hole, thereby reducing the risk of the fastening screw breaking.

[0028] (3) The utility model provides a worm gear parallel electric control electric shift actuator assembly in which two shift heads are arranged between two worm wheels, and a first spacer is arranged between the shift heads and the corresponding worm wheels, and the first spacer is sleeved on the shift pin; a spacer is sleeved on the rotating shaft, one end of the spacer is abutted against one shift head, and the other end is abutted against the other shift head, the axial position of the shift head is limited by the spacer sleeve and the first spacer to prevent axial displacement during rotation, and a second spacer is arranged between the worm wheel and the inner wall of the housing, and the second spacer is sleeved on the worm wheel shaft, and the second spacer is prevented from axial displacement during rotation of the worm wheel and causing wear to the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The three-dimensional structure diagram of a worm gear parallel electric control electric shift actuator assembly embodiment of the utility model Figure 1 ;

[0030] Figure 2 for Figure 1 A top view of

[0031] Figure 3 for Figure 2 XX section view (rotated 90° clockwise);

[0032] Figure 4 for Figure 2 YY-direction sectional view;

[0033] Figure 5 The three-dimensional structure of the embodiment of the utility model is shown in FIG. Figure 2 (Housing not shown).

[0034] The following are the descriptions of the reference numerals:

[0035] 1-shift motor, 2-housing, 3-worm gear, 4-worm, 41-support shaft, 42-boss; 5-shift head, 6-worm gear shaft, 7-rotation shaft, 8-displacement sensor, 9-magnet, 10-shift pin, 11-first spacer, 12-second spacer, 13-spacer sleeve, 14-fastening screw, 15-first plug screw, 16-second plug screw, 17-vent plug, 18-first sleeve, 19-end needle bearing, 20-sealing pad, 21-second sleeve, 22-liner. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and exemplary embodiments.

[0037] Reference Figure 1-Figure 5 The utility model is a worm gear parallel electric control electric shift actuator assembly including a housing 2 arranged on a gearbox, a vent hole is arranged on the top of the housing 2, a vent plug 17 is screwed into the vent hole, the vent hole can balance the internal air pressure, timely discharge the internal high temperature and high pressure gas, and prevent the high temperature and high pressure environment generated during the internal closed work from causing oil leakage, oil seepage or oil deterioration. Two shift motors 1 are fixedly installed side by side on one side of the housing 2, and a gasket 22 is arranged between the shift motor 1 and the housing 2 to strengthen the seal between the shift motor 1 and the housing 2 to prevent oil leakage. The output shaft of each shift motor 1 extends into the housing 2.

[0038] Corresponding to the two shifting motors 1, two sets of transmission components are also provided, each set of transmission components includes a shift head 5, a worm wheel 3 and a worm 4. The output shaft of each shifting motor 1 is connected to the corresponding worm 4. A worm wheel 3 is provided above the worm 4, and the worm wheel 3 is meshed with the worm 4. Compared with the traditional circular worm wheel, the worm wheel 3 in the utility model adopts a fan-shaped structure, so that the required installation height of the worm wheel 3 is greatly reduced, saving installation space, making the entire assembly structure more compact, and facilitating the arrangement of other parts.

[0039] In order to better support the worm 4, a second blind hole is provided on the inner wall of the housing 2. A support shaft 41 is provided at one end of the worm 4 away from the output shaft of the gear shifting motor 1. The support shaft 41 is located in the second blind hole, and a first sleeve 18 is provided between the second blind hole and the support shaft 41. The first sleeve 18 is sleeved on the support shaft 41. The first sleeve 18 is made of a softer metal such as copper, which can effectively prevent wear when the worm 4 rotates. A slot is provided on the inner wall of the housing 2 corresponding to the position of the second blind hole. An end face needle bearing 19 is provided in the slot, which is sleeved on the support shaft 41. One end of the end face needle bearing 19 abuts against the bottom of the slot, and the other end abuts against the boss 42 on the worm 4. In this way, both ends of the worm 4 are supported, and it will be more stable when rotating.

[0040] In order to detect the real-time position of the dial head 5 and perform gear shifting adjustment, two sets of sensor components are provided, which are electrically connected to the two gear shifting motors 1 respectively. Each set of sensor components includes a displacement sensor 8 and a magnet 9. The magnet 9 is arranged on the top of the worm gear 3, and the displacement sensor 8 is arranged on the housing 2. The displacement sensor 8 is electrically connected to the gear shifting motor 1. The displacement sensor 8 determines the rotation position of the worm gear 3 by measuring the relative position between the displacement sensor 8 and the magnet 9, and then determines the position of the dial head 5 through the rotation position of the worm gear 3, and transmits the position information of the dial head 5 to the corresponding gear shifting motor 1. The gear shifting motor 1 then adjusts the position of the dial head 5 according to the position information.

[0041] A center hole is provided at the axis center position of the two worm wheels 3, and a worm wheel shaft 6 whose axis direction is perpendicular to the worm 4 is provided inside the housing 2. The worm wheel shaft 6 is located in the center holes of the two worm wheels 3, so that the worm wheels 3 can rotate around the worm wheel shaft 6. In order to facilitate the installation of the worm wheel shaft 6, a third blind hole is provided on the inner wall of one side of the housing 2, and one end of the worm wheel shaft 6 is located in the third blind hole. A second through hole is provided on the inner wall of the housing 2 on the other side opposite to the third blind hole, and the other end of the worm wheel shaft 6 is located in the second through hole. A fourth threaded hole is provided on the housing 2 corresponding to the second through hole, and a second screw plug 16 is screwed into the fourth threaded hole. The inner end face of the second screw plug 16 abuts against the worm wheel shaft 6. In order to ensure the sealing performance, a sealing gasket 20 is provided between the tail of the second screw plug 16 and the housing 2, so that the worm wheel shaft 6 can be taken out by opening the second screw plug 16, and the operation is simple and convenient.

[0042] An axial hole is provided in the middle of the two dial heads 5, and a rotating shaft 7 is arranged in the shell 2. The axis of the rotating shaft 7 is perpendicular to the worm 4, and the rotating shaft 7 is located below the worm 4. The rotating shaft 7 is located in the axial holes of the two dial heads 5. In order to facilitate the installation of the rotating shaft 7, a first blind hole is provided on the inner wall of one side of the shell 2, and one end of the rotating shaft 7 is located in the first blind hole. A first through hole is provided on the inner wall of the shell 2 on the other side opposite to the first blind hole, and the other end of the rotating shaft 7 is located in the first through hole. A first fixing hole is radially provided on the rotating shaft 7 corresponding to the position of the first through hole, and a first threaded hole is provided on the shell 2 corresponding to the first fixing hole. A fastening screw 14 is screwed into the first threaded hole, and the axial position of the rotating shaft 7 is fixed by the fastening screw 14 and the rotation thereof is prevented. A first through hole is provided on the inner wall of the housing 2 on the other side opposite to the blind hole, and the other end of the rotating shaft 7 is located in the first through hole. A third threaded hole is provided on the housing 2 corresponding to the position of the first through hole, and a first screw plug 15 is screwed into the third threaded hole. In order to ensure the sealing performance, a sealing gasket 20 is provided between the tail of the first screw plug 15 and the housing 2. In this way, the rotating shaft 7 can be taken out by opening the first screw plug 15. In order to reduce the friction when the dial head 5 rotates around the rotating shaft 7, a second sleeve 21 is provided between the rotating shaft 7 and the shaft hole. The second sleeve 21 is provided in the shaft hole, and the dial head 5 is sleeved on the rotating shaft 7 through the second sleeve 21. The second sleeve 21 is made of a softer metal such as copper.

[0043] In order to transmit the shifting force generated by the worm gear pair to the shift head 5, a U-shaped groove is opened on the upper part of the shift head 5, and a shift pin 10 is axially arranged on the worm wheel 3. The shift pin 10 is located on the circumferential side of the center hole, and the line connecting the axis of the shift pin 10 and the center of the center hole is located on the center dividing plane of the worm wheel 3. The outer end of the shift pin 10 is located in the U-shaped groove. In this way, when the worm 4 is driven to rotate by the shifting motor 1, the worm wheel 3 will rotate around the worm wheel shaft 6, and then the shift head 5 is driven to rotate around the rotating shaft 7 through the shift pin 10 to complete the shifting action.

[0044] In order to prevent the axial displacement of the dial head 5 when it rotates on the rotating shaft 7, the two dial heads 5 are arranged between the two worm gears 3, and a spacer sleeve 13 is sleeved on the rotating shaft 7. One end of the spacer sleeve 13 abuts against one dial head 5, and the other end abuts against the other dial head 5. A first spacer 11 is arranged between the dial head 5 and the corresponding worm gear 3. The first spacer 11 is sleeved on the dial pin 10. In this way, the axial positions of the two dial heads 5 are limited by the first spacer 11 and the spacer sleeve 13 to prevent axial displacement when they rotate.

[0045] A second spacer 12 is provided between the worm wheel 3 and the inner wall of the housing 2 . The second spacer 12 is sleeved on the worm wheel shaft 6 , and the axial position of the worm wheel 3 is also limited to prevent the axial displacement of the worm wheel 3 during rotation, thereby preventing the worm wheel 3 from wearing itself and the housing 2 .

[0046] Define the output torque of the shift motor 1 as T1, the number of heads of the worm 4 as n, and the number of teeth of the worm wheel 3 as Z, as follows: Figure 4 As shown, the axial distance between the detent pin 10 and the worm shaft 6 is H1, the axial distance between the detent pin 10 and the rotating shaft 7 is H2, and the axial distance between the rotating shaft 7 and the lower ball head of the detent head 5 is H3;

[0047] Then the torque T2 at the worm gear 3 is: T2 = T1*Z / n;

[0048] The force F1 on the push pin 10 is: F1 = T2 / H1 = T1*Z / n / H1;

[0049] The force on the ball head at the bottom of the shift head 5, i.e. the shift force F2, is: F2 = T1*Z / n / H1*H2 / H3;

[0050] If the mechanical transmission efficiency i is taken into consideration, the calculation formula of the shift force F2 of the shift head 5 during shifting is as follows:

[0051] F2 = T1*Z / n / H1*H2 / H3*i;

[0052] If the lower part of the shift head 5 is fixed (such as in the shifting stage), according to the lever effect, the shift head 5 will generate a horizontal force F2′={T1*Z / n / H1*(H2+H3)} / H3 at the rotating shaft 7. If the rotating shaft 7 is rigidly connected to the fastening screw 14, the fastening screw 14 has a greater risk of breaking under the action of F2′. Therefore, the rotating shaft 7 is clearance-matched with the first through hole, and one end of the fastening screw 14 is located in the first fixing hole and clearance-matched with the first fixing hole. The clearance between the rotating shaft 7 and the first through hole is smaller than the clearance of the fastening screw 14. There is a gap between the nail 14 and the first fixing hole. In this way, the horizontal force F2′ on the rotating shaft 7 will act on the first through hole, reducing the risk of breakage of the fastening screw 14. The rotating shaft 7 is located at one end in the first through hole, and a second threaded hole is axially opened at its end. The second threaded hole can be used for disassembling and assembling the rotating shaft 7. When installing or removing, the bolt or threaded tool can be screwed into the second threaded hole to move or rotate the rotating shaft 7, thereby ensuring that the first threaded hole of the rotating shaft 7 is aligned with the corresponding first fixing hole on the shell 2, making installation more convenient.

[0053] When in use, the position of the magnet 9 is first detected by the displacement sensor 8 to determine the rotation position of the worm wheel 3, and then the position of the dial head 5 is determined by the rotation position of the worm wheel 3, and the position information of the dial head 5 is transmitted to the corresponding shift motor 1, and the shift motor 1 adjusts the position of the dial head 5 according to the position information. The adjustment process is as follows: the shift motor 1 drives the worm 4 to rotate, and the worm wheel 3 meshing with the worm 4 rotates around the worm wheel shaft 6 and then drives the dial head 5 to rotate around the rotating shaft 7 through the shift pin 10. When the displacement sensor 8 detects that the dial head 5 has rotated into place, the shift motor 1 stops and a shift operation is completed. The worm parallel electric control electric shift actuator assembly of the utility model has a compact structure and small space occupation, and is suitable for narrow spaces. Compared with ball screw transmission, it reduces production costs and is suitable for vehicle-mounted platforms without air sources.

[0054] The embodiments described above are merely descriptions of the specific implementation methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A worm gear parallel electric control electric shift actuator assembly, characterized in that: It comprises a gear shifting motor (1), a housing (2), a transmission assembly, and a sensor assembly, wherein the housing (2) is used to be arranged on a gearbox; There are two shift motors (1), which are fixed side by side on one side of the housing (2); The transmission assembly is provided in two sets, each set of the transmission assembly comprises a shift head (5), a worm wheel (3) and a worm (4); the output shaft of the gear shift motor (1) extends into the housing (2) and is connected to the corresponding worm (4); the worm wheel (3) is located above the worm (4) and meshes with the worm (4); a center hole is provided at the axis center position of the two worm wheels (3); a worm wheel shaft (6) is provided in the housing (2); the axis direction of the worm wheel shaft (6) is perpendicular to the worm (4); the worm wheel shaft (6) is located in the center hole, so that the worm wheel (3) can rotate around the worm wheel shaft (6); The middle parts of the two dial heads (5) are each provided with an axial hole, a rotating shaft (7) is arranged in the housing (2), the axis of the rotating shaft (7) is perpendicular to the worm (4), and the rotating shaft (7) is located below the worm (4), and the rotating shaft (7) is located in the axial hole; The worm wheel (3) is a fan-shaped structure. A push pin (10) is axially arranged on the worm wheel (3). The push pin (10) is located on the peripheral side of the center hole, and the line connecting the axis of the push pin (10) and the center of the center hole is located on the mid-plane of the worm wheel (3). A U-shaped groove is opened on the upper part of the shift head (5). The outer end of the push pin (10) is located in the U-shaped groove and is used to shift the shift head (5) to rotate around the rotation axis (7). The sensor assembly is provided in two sets and is electrically connected to two shift motors (1) respectively. The sensor assembly is used to detect the position of the shift head (5) and transmit the position information to the corresponding shift motor (1). The shift motor (1) adjusts the position of the shift head (5) according to the position information.

2. The worm gear parallel electric control electric shift actuator assembly according to claim 1, characterized in that: The two shifting heads (5) are arranged between the two worm wheels (3), a first spacer (11) is arranged between the shifting heads (5) and the corresponding worm wheels (3), and the first spacer (11) is sleeved on the shifting pin (10); A spacer sleeve (13) is sleeved on the rotating shaft (7), one end of the spacer sleeve (13) abuts against one dial head (5), and the other end of the spacer sleeve (13) abuts against another dial head (5); A second spacer (12) is arranged between the worm wheel (3) and the inner wall of the housing (2), and the second spacer (12) is sleeved on the worm wheel shaft (6).

3. The worm gear parallel electric control electric shift actuator assembly according to claim 2, characterized in that: The sensor assembly comprises a displacement sensor (8) and a magnet (9), wherein the displacement sensor (8) is arranged on a housing (2), the magnet (9) is arranged on the top of the worm gear (3), the displacement sensor (8) is electrically connected to the gear shifting motor (1), the displacement sensor (8) determines the rotational position of the worm gear (3) by measuring the relative position between the displacement sensor (8) and the magnet (9), and further determines the position of the shifting head (5) by the rotational position of the worm gear (3), and transmits the position information of the shifting head (5) to the corresponding gear shifting motor (1), and the gear shifting motor (1) adjusts the position of the shifting head (5) according to the position information.

4. The worm gear parallel electric control electric shift actuator assembly according to claim 3 is characterized in that: A first blind hole is provided on the inner wall of one side of the housing (2), and one end of the rotating shaft (7) is located in the first blind hole; a first through hole is provided on the inner wall of the housing (2) on the other side opposite to the first blind hole, and the other end of the rotating shaft (7) is located in the first through hole and is loosely matched with the first through hole; a first fixing hole is provided in the rotating shaft (7) along the radial direction corresponding to the position of the first through hole; a first threaded hole is provided on the housing (2) corresponding to the first fixing hole; a fastening screw (14) is screwed into the first threaded hole; one end of the fastening screw (14) is located in the first fixing hole and is loosely matched with the first fixing hole; the gap between the rotating shaft (7) and the first through hole is smaller than the gap between the fastening screw (14) and the first fixing hole; The rotating shaft (7) is located at one end in the first through hole, and a second threaded hole is opened in the axial direction at the end thereof. A third threaded hole is provided on the housing (2) corresponding to the position of the first through hole, and a first screw plug (15) is screwed into the third threaded hole. A second shaft sleeve (21) is arranged between the rotating shaft (7) and the shaft hole. The second shaft sleeve (21) is arranged in the shaft hole. The dial head (5) is sleeved on the rotating shaft (7) through the second shaft sleeve (21).

5. The worm gear parallel electric control electric shift actuator assembly according to claim 1, characterized in that: The top of the shell (2) is provided with a vent hole, and a vent plug (17) is screwed into the vent hole.

6. The worm gear parallel electric control electric shift actuator assembly according to claim 4, characterized in that: A second blind hole is provided on the inner wall of the housing (2); a support shaft (41) is provided at one end of the worm (4) away from the output shaft of the gear shift motor (1); the support shaft (41) is located in the second blind hole; and a first shaft sleeve (18) is provided between the second blind hole and the support shaft (41); the first shaft sleeve (18) is sleeved on the support shaft (41).

7. The worm gear parallel electric control electric shift actuator assembly according to claim 6, characterized in that: A slot is provided on the inner wall of the housing (2) corresponding to the position of the second blind hole, and an end face needle roller bearing (19) is arranged in the slot and sleeved on the support shaft (41). One end of the end face needle roller bearing (19) abuts against the bottom of the slot, and the other end abuts against a boss (42) arranged on the worm (4).

8. The worm gear parallel electric control electric shift actuator assembly according to claim 7, characterized in that: A third blind hole is provided on the inner wall of one side of the housing (2), and one end of the worm gear shaft (6) is located in the third blind hole; a second through hole is provided on the inner wall of the housing (2) on the other side opposite to the third blind hole, and the other end of the worm gear shaft (6) is located in the second through hole; a fourth threaded hole is provided on the housing (2) corresponding to the second through hole, and a second screw plug (16) is screwed into the fourth threaded hole, and the inner end surface of the second screw plug (16) abuts against the worm gear shaft (6).

9. The worm gear parallel electric control electric shift actuator assembly according to claim 8, characterized in that: A sealing gasket (20) is provided between the tail of the first screw plug (15), the tail of the second screw plug (16) and the housing (2); and a liner (22) is provided between the gear shift motor (1) and the housing (2).

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