Pure electric multi-gear transmission gear shifting upper cover assembly

Abstract

According to the gear shifting upper cover assembly of the pure electric multi-gear transmission, the spring steel ball limiting pin is installed on the upper cover, the self-locking grooves are formed in the rear end of the first-second gear shifting fork shaft and the rear end of the third-fourth shaft shifting fork shaft respectively, the shifting fork shafts are positioned and locked by the spring steel ball limiting pin when the gear is engaged in place, automatic gear shifting and gear disengaging are prevented, the shifting fork is accurately positioned, and the gear shifting efficiency is improved. The self-learning time of the gear shifting executing mechanism is shortened; the shifting fork interlocking assembly located between the first-second gear shifting fork shaft and the third-fourth gear shifting fork shaft is installed at the bottom of the upper cover, one shifting fork shaft locks the other shifting fork shaft in the gear engaging process, two shifting forks are prevented from moving at the same time, the fault that two gears are engaged at the same time is avoided, the assembly structure is simple, the occupied space size is small, arrangement of the internal space of the gearbox is facilitated, and the service life of the gearbox is prolonged. The shifting fork interlocking assembly can roll on the two shifting fork shafts respectively, abrasion is effectively reduced, the positioning reliability of the shifting fork shafts during interlocking is guaranteed, the service life of the interlocking structure is prolonged, and the interlocking reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pure electric multi -gear transmission gear shifting upper cover assembly belongs to pure electric multi -gear transmission technical field. BACKGROUND

[0002] With the motor high -speed development trend, pure electric transmission gradually goes on multi -gear, from which various types of gear shifting mechanism design layer emerges in an endless stream, but the gear shifting mechanism in the new energy field does not have self -locking and interlocking function, the position of gear shifting is relied on the self -learning of gear shifting mechanism to find the neutral position and gear position constantly, and the time is long, and the vehicle needs to learn zero position after each vehicle start or ignition off to start or power off. At the same time, there is no interlocking function between gears, when one gear shifting actuator fails in the gear position, the other gear shifting actuator goes to gear, which will cause two gears to be hung at the same time, permanent damage such as tooth hitting and shaft breaking, and driving safety problems and non - recoverable damage are prone to occur. In the prior art, to realize the self -locking of the fork, spring steel balls and a plurality of fork shafts designed with self -locking grooves are arranged in the transmission case, one of the fork shafts moves along the axial direction, and the remaining fork shafts realize self -locking through the cooperation of the steel balls and the self -locking grooves, and the interlocking of the fork generally adopts an interlocking plate, a protrusion is arranged on the interlocking plate to block and limit the axial displacement of the remaining fork shaft when one of the fork shafts moves, so as to prevent two gears from being hung at the same time.

[0003] 1. The self -locking and interlocking structure is complex, the number of required parts is large, the occupied space is large, and the manufacturing cost is high.

[0004] 2. After long -term use, the protrusion on the interlocking plate will be worn, the axial position of the fork shaft will change, and the interlocking reliability will decrease. INVENTION CONTENTS

[0005] The pure electric multi -gear transmission gear shifting upper cover assembly provided by the utility model prevents automatic gear shifting and gear shifting, the fork positioning is accurate, the self -learning time of the gear shifting actuator is reduced, the fault of simultaneously hanging two gears is avoided, the assembly structure is simple, the occupied space volume is small, the service life of the interlocking structure is prolonged, and the interlocking reliability is improved.

[0006] To achieve the above purpose, the utility model adopts the technical scheme that:

[0007] The application discloses a shift-up cover assembly of a pure electric multi-gear transmission, which comprises a cover, a shift execution mechanism I for controlling gear shifting of gears 1 and 2, a shift execution mechanism II for controlling gear shifting of gears 3 and 4, a movable gear 1-2 shift fork shaft arranged at the bottom of the cover, a movable gear 3-4 shift fork shaft arranged at the bottom of the cover and parallel to the gear 1-2 shift fork shaft, a gear 1-2 shift fork fixed on the gear 1-2 shift fork shaft, and a gear 3-4 shift fork fixed on the gear 3-4 shift fork shaft.

[0008] Preferably, three self-locking grooves corresponding to the shift fork gear positions are arranged on the gear 1-2 shift fork shaft and the gear 3-4 shift fork shaft respectively, the three self-locking grooves on the gear 1-2 shift fork shaft are a gear 1 self-locking groove, a neutral gear self-locking groove and a gear 2 self-locking groove arranged in sequence along the axial direction, the three self-locking grooves on the gear 3-4 shift fork shaft are a gear 3 self-locking groove, a neutral gear self-locking groove and a gear 4 self-locking groove arranged in sequence along the axial direction, the spring steel ball limiting pin comprises a pin sleeve threadedly arranged on the cover, and a steel ball arranged in the pin sleeve and pushed out of the bottom end of the pin sleeve by a spring, the steel ball is arranged in the self-locking groove to elastically position the gear 1-2 shift fork shaft and the gear 3-4 shift fork shaft.

[0009] Preferably, the gear 1-2 shift fork shaft and the gear 3-4 shift fork shaft are respectively provided with interlocking grooves corresponding to the shift fork interlocking assembly and in an arc shape, the bottom of the cover is provided with an interlocking mounting block, the gear 1-2 shift fork shaft and the gear 3-4 shift fork shaft penetrate through the interlocking mounting block, the interlocking mounting block is provided with an interlocking mounting cavity corresponding to the interlocking groove, the shift fork interlocking assembly is arranged in the interlocking mounting cavity and comprises an interlocking positioning pin and interlocking steel balls arranged at two ends of the interlocking positioning pin, and the gear 1-2 shift fork shaft or the gear 3-4 shift fork shaft is positioned when the interlocking steel balls are arranged in the interlocking groove.

[0010] Preferably, the two ends of the interlocking positioning pin are both provided with two interlocking steel balls in contact with each other.

[0011] Preferably, the bottom of the cover is further fixed with a gear 1-2 guide shaft parallel to the gear 1-2 shift fork shaft, the gear 1-2 guide shaft is guided and matched to penetrate through the gear 1-2 shift fork, and the gear 1-2 shift fork shaft is guided and matched to penetrate through the gear 3-4 shift fork.

[0012] Preferably, the shifting execution mechanism one is inserted into the corner groove of the first and second shifting fork, and the shifting execution mechanism two is inserted into the corner groove of the third and fourth shifting block.

[0013] The present application has the following advantages:

[0014] The spring steel ball limiting pin is installed on the upper cover, the self-locking grooves are arranged at the rear ends of the first and second shifting fork shaft and the third and fourth shifting fork shaft, the spring steel ball limiting pin is pressed into the self-locking groove to elastically fix the shifting fork shaft when the self-locking groove is aligned with the spring steel ball limiting pin during the movement of the shifting fork shaft, the shifting fork shaft is positioned and locked by the spring steel ball limiting pin when the shifting fork is engaged, the position of the shifting fork on the shifting fork shaft is locked at the corresponding gear position, the automatic shifting and disengagement are prevented, the shifting fork is accurately positioned, and the self-learning time of the shifting execution mechanism is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the shifting upper cover assembly of the pure electric multi-gear transmission.

[0016] Figure 2 It is another schematic view of the shifting upper cover assembly of the pure electric multi-gear transmission.

[0017] Figure 3 It is a top view of the shifting upper cover assembly of the pure electric multi-gear transmission.

[0018] Figure 4 It is a sectional view of the F-F direction of the shifting upper cover assembly of the pure electric multi-gear transmission. Figure 3

[0019] Figure 5 It is a sectional view of the T-T direction of the shifting upper cover assembly of the pure electric multi-gear transmission. Figure 3

[0020] Figure 6 It is a sectional view of the shifting upper cover assembly of the pure electric multi-gear transmission at the position of the shifting fork interlocking assembly. ​​DETAILED DESCRIPTION

[0021] The following description will be made in conjunction with Figures 1-6 The embodiments of the present utility model are described in detail.

[0022] The pure electric multi-gear transmission gear shift upper cover assembly comprises an upper cover 1, a gear shift actuator 1 2 for controlling gear shift of gears 1 and 2, a gear shift actuator 2 3 for controlling gear shift of gears 3 and 4, a gear shift fork shaft 4 for gears 1 and 2 movably arranged at the bottom of the upper cover 1, a gear shift fork shaft 5 for gears 3 and 4 movably arranged at the bottom of the upper cover 1 and parallel to the gear shift fork shaft 4 for gears 1 and 2, a gear shift fork 6 for gears 1 and 2 fixed on the gear shift fork shaft 4 for gears 1 and 2, a gear shift fork 7 for gears 3 and 4 fixed on the gear shift fork shaft 5 for gears 3 and 4, the gear shift actuator 1 2 drives the gear shift fork shaft 4 for gears 1 and 2 and the gear shift fork 6 for gears 1 and 2 to move, the gear shift actuator 2 3 drives the gear shift fork shaft 5 for gears 3 and 4 and the gear shift fork 7 for gears 3 and 4 to move, characterized in that: the rear ends of the gear shift fork shaft 4 for gears 1 and 2 and the gear shift fork shaft 5 for gears 3 and 4 are respectively provided with circular-arc-shaped self-locking grooves 8, the upper cover 1 is provided with spring steel ball limit pins 9 matched with the self-locking grooves 8, the spring steel ball limit pins 9 extend into the self-locking grooves 8 to elastically position the gear shift fork shaft 4 for gears 1 and 2 and the gear shift fork shaft 5 for gears 3 and 4, the bottom of the upper cover 1 is provided with a gear shift fork interlocking assembly 10 located between the gear shift fork shaft 4 for gears 1 and 2 and the gear shift fork shaft 5 for gears 3 and 4 and capable of rolling on the gear shift fork shaft 4 for gears 1 and 2 or the gear shift fork shaft 5 for gears 3 and 4, the gear shift fork interlocking assembly 10 positions the gear shift fork shaft 5 for gears 3 and 4 with the movement of the gear shift fork shaft 4 for gears 1 and 2, or positions the gear shift fork shaft 4 for gears 1 and 2 with the movement of the gear shift fork shaft 5 for gears 3 and 4.

[0023] The spring steel ball limiting pin 9 is installed on the upper cover 1, the self-locking grooves 8 are respectively formed at the rear ends of the first-second gear shift fork shaft 4 and the third-fourth gear shift fork shaft 6, when the self-locking grooves 8 are aligned with the spring steel ball limiting pin 9 during the movement of the shift fork shaft, the spring steel ball limiting pin 9 is pressed into the self-locking groove to elastically fix the shift fork shaft, so that the shift fork shaft is positioned and locked by the spring steel ball limiting pin 9 when the shift fork is engaged in the position, thereby locking the shift fork position on the shift fork shaft at the corresponding gear position, preventing automatic gear shifting and disengaging, accurately positioning the shift fork, and reducing the self-learning time of the gear shifting actuator; the shift fork interlocking assembly 10 is installed between the first-second gear shift fork shaft 4 and the third-fourth gear shift fork shaft 5 at the bottom of the upper cover 1, when the first-second gear shift fork shaft 4 moves, the shift fork interlocking assembly 10 is pushed to position the third-fourth gear shift fork shaft 5, when the third-fourth gear shift fork shaft 5 moves, the shift fork interlocking assembly 10 is pushed to position the first-second gear shift fork shaft 4, forming a shift fork shaft engaging lock for the other shift fork shaft, avoiding the simultaneous movement of two shift forks, to avoid the failure of engaging two gears at the same time, the spring steel ball limiting pin 9 is installed on the upper cover 1, the shift fork interlocking assembly 10 is installed at the bottom of the upper cover 1 and between the two shift fork shafts, the assembly structure is simple, the occupied space is small, which is beneficial to the internal space arrangement of the gearbox, the shift fork interlocking assembly 10 can roll on the two shift fork shafts respectively, effectively reducing the wear, ensuring the positioning reliability of the shift fork shaft during interlocking, prolonging the service life of the interlocking structure, and improving the interlocking reliability.

[0024] The three self-locking grooves 8 on the first-second gear shift fork shaft 4 are a first gear self-locking groove, a neutral self-locking groove and a second gear self-locking groove arranged in sequence along the axial direction; the three self-locking grooves 8 on the third-fourth gear shift fork shaft 5 are a third gear self-locking groove, a neutral self-locking groove and a fourth gear self-locking groove arranged in sequence along the axial direction; the spring steel ball limiting pin 9 comprises a pin sleeve 91 screwed on the upper cover 1 and a steel ball 92 in the pin sleeve 91 pushed out by a spring and extending to the bottom end of the pin sleeve 91; the steel ball 92 extends into the self-locking groove 8 to elastically position the first-second gear shift fork shaft 4 and the third-fourth gear shift fork shaft 5. The three self-locking grooves 8 are arranged on the first-second gear shift fork shaft 4; in the initial installation state, the steel ball 91 in the spring steel ball limiting pin 9 is pressed into the neutral self-locking groove in the middle to lock the first-second gear shift fork 6 in the initial neutral position; when the first-second gear shift fork shaft is axially moved by the gear shift actuator 2, the spring steel ball limiting pin 9 is aligned with the first gear self-locking groove or the second gear self-locking groove to press the steel ball into the first gear self-locking groove or the second gear self-locking groove, thereby locking the position of the first-second gear shift fork 6 when the first-second gear shift fork 6 is engaged with the first gear or the second gear, preventing automatic gear shifting or gear disengagement; the three self-locking grooves 8 are arranged on the third-fourth gear shift fork shaft 5; in the initial installation state, the steel ball 91 in the spring steel ball limiting pin 9 is pressed into the neutral self-locking groove in the middle to lock the third-fourth gear shift fork 7 in the initial neutral position; when the third-fourth gear shift fork shaft 5 is axially moved by the gear shift actuator 3, the spring steel ball limiting pin 9 is aligned with the third gear self-locking groove or the fourth gear self-locking groove to press the steel ball into the third gear self-locking groove or the fourth gear self-locking groove, thereby locking the position of the third-fourth gear shift fork 7 when the third-fourth gear shift fork 7 is engaged with the third gear or the fourth gear, preventing automatic gear shifting or gear disengagement.

[0025] The first and second shift fork shaft 4 and the third and fourth shift fork shaft 5 are respectively provided with a circular arc-shaped interlocking groove 11 corresponding to the shift fork interlocking assembly 10, the bottom of the upper cover 1 is provided with an interlocking mounting block 12, the first and second shift fork shaft 4 and the third and fourth shift fork shaft 5 penetrate through the interlocking mounting block 12, the interlocking mounting block 12 is provided with an interlocking mounting cavity 13 corresponding to the interlocking groove 11, the shift fork interlocking assembly 10 is mounted in the interlocking mounting cavity 13, and the first and second shift fork shaft 4 or the third and fourth shift fork shaft 5 is positioned by the interlocking steel ball 102 extending into the interlocking groove 11. The first and second shift fork shaft 4 and the third and fourth shift fork shaft 5 are respectively provided with an interlocking groove 11, the interlocking mounting cavity 13 on the interlocking mounting block 12 corresponds to the interlocking groove 11, the shift fork interlocking assembly 10 is mounted in the interlocking mounting cavity 12, when the first and second shift fork and the third and fourth shift fork are located at the neutral position, the interlocking grooves 11 of the two shift fork shafts are aligned, one end of the interlocking positioning pin 101 and the interlocking steel ball 102 extend into the interlocking groove 11 of the first and second shift fork shaft 4, when the first and second shift fork shaft 4 is engaged, the interlocking groove 11 and the interlocking steel ball 102 are misaligned, the interlocking steel ball 102 is pushed to roll to one side of the third and fourth shift fork shaft 4, the interlocking steel ball 102 pushes the interlocking positioning pin 101 to move to one side of the third and fourth shift fork shaft 104, the other end of the interlocking positioning pin 101 and the interlocking steel ball 102 extend into the interlocking groove 11 on the third and fourth shift fork shaft 5 to position the third and fourth shift fork shaft 5, so that the third and fourth shift fork is positioned at the neutral position, when one shift fork shaft is engaged from the neutral position, the interlocking steel ball can be pushed into the interlocking groove of the other shift fork shaft to form positioning, so that the two shift fork shafts cannot be engaged synchronously, thereby preventing the shift forks on the two shift fork shafts from being engaged synchronously, and avoiding the synchronous engagement failure.

[0026] The two ends of the interlocking positioning pin 101 are provided with two interlocking steel balls 102 in contact with each other. The two interlocking steel balls are arranged at the ends of the interlocking positioning pin to ensure that the interlocking steel balls 102 can rotate or slide more freely, reduce the wear of the interlocking steel balls 102 and the interlocking groove, ensure the positioning reliability of the shift fork shaft during interlocking, prolong the service life of the interlocking structure, and improve the interlocking reliability.

[0027] The bottom of the upper cover 1 is further fixed with a second gear shifting fork shaft 4, and a second gear shifting guide shaft 14 parallel to the second gear shifting fork shaft 4 is arranged, the second gear shifting guide shaft 14 is guided and matched with the second gear shifting fork 6, and the second gear shifting fork shaft 4 is guided and matched with the third gear shifting fork 7. The second gear shifting fork 6 is fixed with the second gear shifting fork shaft 4 and is guided and moved through the second gear shifting guide shaft 14, so that the second gear shifting fork 6 is prevented from rotating on the second gear shifting fork shaft 4, the third gear shifting fork 7 is fixed with the third gear shifting fork shaft 5 and is guided through the second gear shifting fork shaft 4, so that the third gear shifting fork 7 is prevented from rotating on the third gear shifting fork shaft 5, and the second gear shifting fork shaft 4 functions as the fixed shaft of the second gear shifting fork 6 and also functions as the guide shaft of the third gear shifting fork 7, so that the structure is effectively simplified and the space occupancy of the upper cover assembly is reduced.

[0028] The shifting execution mechanism one 2 is matched with the second gear shifting fork 6 and the third gear shifting guide block 51 is fixed on the third gear shifting fork shaft 5, and the shifting execution mechanism two 3 is matched with the third gear shifting guide block 51. The shifting execution mechanism one 2 is matched with the second gear shifting fork 6 and the third gear shifting guide block 51 is fixed on the third gear shifting fork shaft 5, and the shifting execution mechanism two 3 is matched with the third gear shifting guide block 51. The shifting execution mechanism one 2 is matched with the second gear shifting fork 6 and the third gear shifting guide block 51 is fixed on the third gear shifting fork shaft 5, and the shifting execution mechanism two 3 is matched with the third gear shifting guide block 51.

[0029] The technical scheme of the embodiments of the present application is described in combination with the drawings, and it should be noted that the described embodiments are only a part of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

Claims

1. A shift-up cover assembly of a pure electric multi-gear transmission, comprising a cover, a shift actuator I for controlling the shifting of gears 1 and 2, a shift actuator II for controlling the shifting of gears 3 and 4, a movable gear 1-2 shift fork shaft installed at the bottom of the cover, a movable gear 3-4 shift fork shaft installed at the bottom of the cover and parallel to the gear 1-2 shift fork shaft, a gear 1-2 shift fork fixed on the gear 1-2 shift fork shaft, and a gear 3-4 shift fork fixed on the gear 3-4 shift fork shaft, the shift actuator I drives the gear 1-2 shift fork shaft and the gear 1-2 shift fork to move, and the shift actuator II drives the gear 3-4 shift fork shaft and the gear 3-4 shift fork to move, characterized in that: The rear end of the first-second shift fork shaft and the third-fourth shift fork shaft is respectively provided with a circular arc-shaped self-locking groove, the upper cover is provided with a spring steel ball limit pin matched with the self-locking groove, the spring steel ball limit pin extends into the self-locking groove to elastically position the first-second shift fork shaft and the third-fourth shift fork shaft, the bottom of the upper cover is provided with a shift fork interlocking assembly located between the first-second shift fork shaft and the third-fourth shift fork shaft and capable of rolling on the first-second shift fork shaft or the third-fourth shift fork shaft, the shift fork interlocking assembly is positioned with the first-second shift fork shaft or the third-fourth shift fork shaft according to the movement of the first-second shift fork shaft or the third-fourth shift fork shaft. ​ 2. The pure electric multi-speed transmission shift-on-gear cover assembly of claim 1, wherein: The first-second shift fork shaft and the third-fourth shift fork shaft are respectively provided with three self-locking grooves corresponding to the shift fork gear positions, the three self-locking grooves on the first-second shift fork shaft are a first gear self-locking groove, a neutral gear self-locking groove and a second gear self-locking groove arranged in sequence along the axial direction, and the three self-locking grooves on the third-fourth shift fork shaft are a third gear self-locking groove, a neutral gear self-locking groove and a fourth gear self-locking groove arranged in sequence along the axial direction, the spring steel ball limit pin comprises a pin sleeve threadedly matched with the upper cover and a steel ball arranged in the pin sleeve and pushed out of the bottom end of the pin sleeve by a spring, and the steel ball extends into the self-locking groove to elastically position the first-second shift fork shaft and the third-fourth shift fork shaft.

3. The pure electric multi-speed transmission shift-on-gear cover assembly of claim 1, wherein: The first-second shift fork shaft and the third-fourth shift fork shaft are respectively provided with interlocking grooves corresponding to the shift fork interlocking assembly and in a circular arc shape, the bottom of the upper cover is provided with an interlocking mounting block, the first-second shift fork shaft and the third-fourth shift fork shaft penetrate through the interlocking mounting block, the interlocking mounting block is provided with an interlocking mounting cavity corresponding to the interlocking groove, the shift fork interlocking assembly is arranged in the interlocking mounting cavity and comprises an interlocking positioning pin and interlocking steel balls arranged at both ends of the interlocking positioning pin, and the first-second shift fork shaft or the third-fourth shift fork shaft is positioned according to the extension of the interlocking steel balls into the interlocking groove.

4. The pure electric multi-speed transmission shift-on-gear cover assembly of claim 3, wherein: Both ends of the interlocking positioning pin are provided with two interlocking steel balls in contact with each other.

5. The pure electric multi-speed transmission shift-on-gear cover assembly of claim 1, wherein: The bottom of the upper cover is further fixed with a first-second guide shaft parallel to the first-second shift fork shaft, the first-second guide shaft is guided and matched to penetrate through the first-second shift fork, and the first-second shift fork shaft is guided and matched to penetrate through the third-fourth shift fork.

6. The pure electric multi-speed transmission shift-on-gear cover assembly of claim 1, wherein: The shift head of the shift actuator one is matched to extend into the corner groove of the first-second shift fork, and the third-fourth shift fork shaft is fixed with a third-fourth guide block, and the shift head of the shift actuator two is matched to extend into the corner groove of the third-fourth guide block.

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