A self-amplifying synchronizer for automobile gearbox

Abstract

The present invention discloses a self-amplifying synchronizer for an automobile gearbox, comprising a gear hub, an outer side of the gear hub is provided with an external spline, three pairs of force-amplifying bosses are evenly provided on the outer side of the gear hub, a first positioning surface and a first force-amplifying surface are provided on the force-amplifying bosses, gear gears are arranged on both sides of the gear hub, a friction cone disk is fixedly installed on each of the two gear gears, a sliding sleeve is provided on the outer sliding sleeve of the gear hub, and an inner spline matched with the outer spline of the gear hub is provided on the inner surface of the sliding sleeve. The present invention provides a force-amplifying boss and a force-amplifying pin, and in the process of shifting gears, under the action of the shifting force, the sliding disk carries the force-amplifying pin and moves axially with the synchronizer ring, and when the friction cone surface of the synchronizer ring contacts the friction cone surface of the friction cone disk, a friction torque is generated, thereby reducing the shifting force that the driver must provide when shifting gears, which makes it easier for the driver to shift gears. It is suitable for automobiles.

Description

Technical Field

[0001] The invention relates to the technical field of synchronizers, in particular to a self-amplifying synchronizer for an automobile gearbox. Background Art

[0002] The synchronizer is an important part of the automobile transmission. It synchronizes the input and output parts of the synchronizer and then combines them, thereby reducing the impact and noise during gear shifting, reducing the gear shifting force, making the gear shifting smooth and light, reducing the driver's fatigue, extending the life of the transmission, improving the safety and ride comfort of the car, and improving the acceleration and economy of the car when starting. It plays an extremely important role.

[0003] As we all know, the shifting force of a manual transmission must be manually applied to the synchronizer by the vehicle driver. As people's requirements for the comfort of automobile shifting operations increase, they hope that the shifting process will be light and fast. This requires that the driver reduce the shifting force while shortening the shifting time. All these put higher requirements on the design of the synchronizer.

[0004] Chinese patent CN201910071341.0 discloses a synchronizer for an automobile gearbox, comprising a gear hub, gears are arranged on both sides of the gear hub, a sliding sleeve is slidably mounted on the outer side of the gear hub, sleeve locking surfaces are respectively arranged at both ends of the outer spline of the sliding sleeve, a sliding disc is fixedly mounted on the outer surface of the sliding sleeve, and an even number of sliding disc notches are arranged on the inner surface of the sliding disc; a synchronizer ring is slidably mounted on the outer surface of the sliding sleeve at positions corresponding to both sides of the sliding disc, and a limiting boss is arranged on the inner end surface of the synchronizer ring and is inserted into the notch of the sliding disc at intervals; an inner spline is arranged on the inner surface of the synchronizer ring, the inner spline is staggered with the notch of the sliding disc, a synchronizer ring locking surface is arranged at the inner end of the inner spline on the synchronizer ring, and the outer surface of the synchronizer ring is a friction cone surface; a spring piece that can drive the synchronizer ring to slide is clamped on the outer surface of the sliding sleeve; a friction cone disk is fixedly mounted on each of the two gear gears, and the inner surface of the friction cone disk is a friction cone surface that matches the friction cone surface of the synchronizer ring, and is suitable for a gearbox.

[0005] The automobile transmission synchronizer is designed with a friction cone disk separately, so that the width of the friction cone surface can be increased by reducing the thickness of the sliding disk, so that the synchronizer has a larger synchronization capacity and improves the overload resistance of the synchronizer; the sliding sleeve and the sliding disk are designed as an assembled structure, which greatly reduces the difficulty of parts production. However, it is still difficult to improve the comfort of the driver in shifting gears. Summary of the invention

[0006] The purpose of the present invention is to provide a self-energizing synchronizer for an automobile gearbox.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-amplifying synchronizer for an automobile gearbox, comprising a gear hub, an outer side of the gear hub is provided with an external spline, three pairs of force-amplifying bosses are evenly provided on the outer side of the gear hub, a first positioning surface and a first force-amplifying surface are provided on the force-amplifying bosses, gears are arranged on both sides of the gear hub, a friction cone disk is fixedly installed on each of the two gear gears, a sliding sleeve is slidingly sleeved on the outer side of the gear hub, an inner spline matching the outer spline of the gear hub is provided on the inner surface of the sliding sleeve, a waist-shaped hole corresponding to the position of the force-amplifying boss of the gear hub is also provided on the sliding sleeve, a locking ring is sleeved on the outer side of the sliding sleeve, first locking surfaces are provided on both side surfaces of the locking ring, and a through hole is provided in the middle of the locking ring;

[0008] A sliding disk is fixedly mounted on the outer surface of the locking ring, a first notch, a second notch and a third notch are arranged on the inner surface of the sliding disk, the number of the second notch is equal to the waist-shaped hole and the through hole, the second notch is arranged corresponding to the waist-shaped hole and the through hole, a force-enhancing pin is arranged at the second notch on the inner surface of the sliding disk, the force-enhancing pin passes through the waist-shaped hole on the sliding sleeve and the through hole on the locking ring in sequence, and the top of the force-enhancing pin is fixedly installed in the second notch, and the tail of the force-enhancing pin is in sliding contact with the force-enhancing boss of the gear hub;

[0009] A synchronizer ring is slidably mounted on the outer surface of the locking ring at positions corresponding to both sides of the sliding disk, a second locking surface and three evenly distributed notches are arranged on the inner side surface of the synchronizer ring, and a first friction cone surface is arranged on the outer surface of the synchronizer ring.

[0010] Preferably, each of the force-enhancing bosses is respectively provided with two first force-enhancing surfaces and one first positioning surface.

[0011] Preferably, the tail of the force boosting pin is symmetrically provided with four second force boosting surfaces and two second positioning surfaces, the second positioning surface of the force boosting pin has the same shape as the first positioning surface of the force boosting boss, the first positioning surface and the second positioning surface are respectively parallel to the center axis of the synchronizer, the second force boosting surface of the force boosting pin has the same shape as the first force boosting surface of the force boosting boss, the middle part of the force boosting pin is a cylindrical surface, the diameter of the cylindrical surface is the same as the width of the waist hole of the sliding sleeve and the diameter of the through hole on the locking ring, the length of the waist hole of the sliding sleeve is larger than the diameter of the cylindrical surface of the force boosting pin, the top of the force boosting pin is rectangular, and the width of the top of the force boosting pin is equal to the width of the second notch on the sliding disk.

[0012] Preferably, a blind hole is provided on the outer side of the gear hub, and a coil spring and a support pin are inserted into the blind hole in sequence. The coil spring is at the bottom of the blind hole, supporting the bottom of the support pin outward. The bottom of the support pin is a plane, and the top is an outer arc surface. When the sleeve is mounted on the gear hub, the top of the support pin is pushed into the socket of the sleeve, and the coil spring is in a compressed state.

[0013] Preferably, a connecting block is provided between the two synchronizer rings, the connecting block passes through the first notch of the sliding disk and is fixedly installed in the notch of the synchronizer ring, the width of the connecting block is equal to the width of the notch of the synchronizer ring, the width of the first notch of the sliding disk is greater than the width of the connecting block, the connecting block and the synchronizer ring notch are installed by welding or interference fitting, and the two synchronizer rings are connected into one, a locking boss is provided on the inner side of the synchronizer ring, and second locking surfaces are provided at both ends of the inner side surface of the locking boss, and the number and position of the second locking surfaces of the synchronizer ring are equal to the first locking surfaces on the same side of the locking ring.

[0014] Preferably, three arc grooves evenly distributed along the circumference are provided on the outer circular surface of the locking ring, a pre-synchronization spring is arranged between the locking ring and the connecting block, the pre-synchronization spring is fixedly mounted on the connecting block, and the pre-synchronization spring is provided with an arc surface protruding inward, and the position of the arc surface corresponds to the position of the arc groove on the locking ring.

[0015] Preferably, the force-boosting pin is connected to the sliding plate as a whole by welding after being installed in place.

[0016] Preferably, a second friction cone surface is provided on the inner side of the friction cone disk, and the second friction cone surface and the first friction cone surface of the synchronizer ring form a mutual friction surface.

[0017] The present invention provides a self-amplifying synchronizer for an automobile gearbox, which has the following beneficial effects:

[0018] 1. By setting the force-enhancing boss and the force-enhancing pin, during the gear-engaging process, under the action of the gear-engaging force, the sliding plate carries the force-enhancing pin and the synchronizer ring to move axially. When the friction cone surface of the synchronizer ring contacts the friction cone surface of the friction cone plate, a friction torque is generated. The sliding plate and the force-enhancing pin rotate under the action of the friction torque, so that the force-enhancing surface of the force-enhancing pin rotates to contact and press the force-enhancing surface of the force-enhancing boss. At this time, an axial force component toward the gear-engaging side is generated between the force-enhancing surfaces. The axial force component is transmitted to the sliding plate through the force-enhancing pin and then to the synchronizer ring, so that the synchronizer ring obtains an additional axial force in addition to the gear-engaging force provided by the vehicle driver during operation, thereby reducing the gear-engaging force that the driver must provide when engaging the gear, which makes it easier for the driver to engage the gear.

[0019] 2. By dividing the gear sleeve of the traditional lock ring synchronizer into a sliding sleeve, a locking ring and a sliding plate according to their functions, and connecting the three together through a force-enhancing pin to form a sliding sleeve assembly, on the one hand, the structure of each component is greatly simplified, and they can be processed and assembled separately, thereby reducing the processing cost; on the other hand, the head of the force-enhancing pin is rigidly connected to the sliding plate through a fixed connection, the middle part of the force-enhancing pin passes through the through hole of the locking ring, and the diameter of the middle part of the force-enhancing pin is equal to the diameter of the through hole of the locking ring, so that the sliding plate and the locking ring are rigidly connected to each other, and the middle part of the force-enhancing pin is rigidly connected to the locking ring. The waist-shaped hole passes through the sliding sleeve, and the width of the waist-shaped hole is equal to the middle diameter of the force-boosting pin, and the length of the waist-shaped hole is greater than the middle diameter of the force-boosting pin. In this way, the sliding plate is completely fixed to the locking ring and the sliding plate in the axial direction, and there is a certain relative rotation space in the circumferential direction, so that the axial movement and force of the sliding sleeve assembly are completely consistent, and the force-boosting pin can move with the axial position during operation, and the force-boosting surface can always fit and press with the force-boosting surface of the force-boosting boss through circumferential rotation, so as to achieve a continuous force-boosting effect until the gear is engaged.

[0020] 3. Positioning surfaces are respectively provided at the tail of the force-boosting boss and the force-boosting pin, and the positioning surface of the force-boosting pin has the same shape as the positioning surface of the force-boosting boss, and the two groups of positioning surfaces are respectively parallel to the central axis of the synchronizer. In this way, when in the neutral position, the positioning surface of the force-boosting pin contacts the positioning surface of the force-boosting boss, which can limit the relative rotation of the sliding sleeve and the gear hub, and avoid the contact between the force-boosting pin and the force-boosting surface of the gear hub. No axial force component is generated in the neutral position, so that the sliding sleeve and the gear hub will not have relative rotation in the circumferential direction and relative movement in the axial direction when the synchronizer is in the neutral position, thereby reducing the failure risk of the synchronizer and the noise of the gearbox.

[0021] 4. By setting the coil spring and the support pin, the sleeve can be radially supported by the support pin. In order to enable the sleeve to slide smoothly on the gear hub, a large gap is designed between the inner spline and the outer spline of the gear hub. With the support of the support pin, the sleeve and the gear hub can maintain good coaxiality, avoiding the sleeve from deviating from the center position under the action of external forces such as gravity, resulting in jamming or failure to engage the gear when shifting gears.

[0022] 5. The two synchronizer rings are connected as one by setting a connecting block. When the synchronizer is shifted from one gear to the other, the friction cone surface of the synchronizer ring on the shifting side will be automatically separated from the friction cone surface of the friction cone plate under the action of the gear shifting force, so as to avoid the friction cone surface being too tight and difficult to separate without external force, resulting in the failure of the friction cone surface due to continuous friction. After the gear is shifted, the synchronizer ring on the non-gear side is integrated with the synchronizer ring on the gear shifting side, so there will be no shaking, so as to avoid the synchronizer ring on the non-gear side being damaged by contact with other parts due to excessive shaking of the synchronizer ring.

[0023] 6. By installing the booster pin in place and then welding it to the sliding plate as a whole, the sliding sleeve assembly can be split into the sliding sleeve, locking ring and sliding plate according to the function, and then connected through the booster pin, so as to realize the above-mentioned synchronizer booster function. The welding process makes the connection strength between the booster pin and the sliding plate high, and the axial booster force generated by the booster pin can be reliably transmitted to the sliding plate, reducing the risk of separation between the two due to unreliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention when it is in a neutral state;

[0025] Figure 2 It is a schematic diagram of the installation structure of the gear hub, the sliding sleeve, the coil spring and the support pin;

[0026] Figure 3 It is a schematic diagram of the installation structure of the sliding sleeve, locking ring, sliding plate and force amplification pin;

[0027] Figure 4 It is an exploded schematic diagram of the installation of the gear hub, sliding sleeve, locking ring, sliding plate and force amplification pin;

[0028] Figure 5 It is a partial broken section schematic diagram of the installation structure of the sliding plate, the synchronizer ring, the connecting block and the pre-synchronization spring;

[0029] Figure 6 is a schematic diagram of the structure of the gear hub;

[0030] Figure 7 It is a structural schematic diagram of the locking ring;

[0031] Figure 8 It is a structural schematic diagram of a sliding plate;

[0032] Fig. 9 is a structural schematic diagram of a synchronization ring;

[0033] Fig.10 The top view and front view of the positional relationship between the gear hub booster boss and the booster pin when in neutral state;

[0034] Fig.11 This is a structural schematic diagram of the positional relationship between the gear hub force-enhancing boss and the force-enhancing pin during the gear shifting process.

[0035] In the figure: gear hub 1, force-enhancing boss 1a, first positioning surface 1a1, first force-enhancing surface 1a2, blind hole 1b, gear position gear 2, sleeve 3, waist-shaped hole 3a, socket hole 3b, locking ring 4, first locking surface 4a, through hole 4b, arc groove 4c, sliding plate 5, first notch 5a, second notch 5b, third notch 5c, synchronizer ring 6, locking boss 6a, second locking surface 6a1, notch 6b, first friction cone surface 6c, connecting block 7, pre-synchronization spring 8, arc surface 8a, force-enhancing pin 9, second positioning surface 9a, second force-enhancing surface 9b, cylindrical surface 9c, support pin 10, coil spring 11, friction cone plate 12, second friction cone surface 12a. DETAILED DESCRIPTION

[0036] like Figure 1-11 As shown, the present invention provides a technical solution: a self-amplifying synchronizer for an automobile gearbox, comprising a gear hub 1, an outer side of the gear hub 1 is provided with an external spline, three pairs of force-enhancing bosses 1a are evenly provided on the outer side of the gear hub 1, a first positioning surface 1a1 and a first force-enhancing surface 1a2 are provided on the force-enhancing bosses 1a, gears 2 are arranged on both sides of the gear hub 1, and a friction cone 12 is fixedly installed on each of the two gear gears 2, a sliding sleeve 3 is slidingly sleeved on the outer side of the gear hub 1, an inner spline matching the external spline of the gear hub 1 is provided on the inner surface of the sliding sleeve 3, a waist-shaped hole 3a corresponding to the position of the force-enhancing boss 1a of the gear hub 1 is also provided on the sliding sleeve 3, a locking ring 4 is sleeved on the outer side of the sliding sleeve 3, first locking surfaces 4a are provided on both side surfaces of the locking ring 4, and a through hole 4b is provided in the middle of the locking ring 4;

[0037] A sliding plate 5 is fixedly mounted on the outer surface of the locking ring 4, and a first notch 5a, a second notch 5b and a third notch 5c are arranged on the inner surface of the sliding plate 5. The number of the second notches 5b is equal to that of the waist-shaped holes 3a and the through holes 4b, and the second notches 5b are arranged corresponding to the waist-shaped holes 3a and the through holes 4b. A force-enhancing pin 9 is arranged at the second notch 5b on the inner surface of the sliding plate 5. The force-enhancing pin 9 passes through the waist-shaped hole 3a on the sliding sleeve 3 and the through hole 4b on the locking ring 4 in sequence, and the top of the force-enhancing pin 9 is fixedly installed in the second notch 5b, and the tail of the force-enhancing pin 9 is in sliding contact with the force-enhancing boss 1a of the gear hub 1;

[0038] A synchronizer ring 6 is slidably mounted on the outer surface of the locking ring 4 at positions corresponding to both sides of the sliding disk 5. A second locking surface 6a and three evenly distributed notches 6b are arranged on the inner side surface of the synchronizer ring 6. A first friction cone surface 6c is arranged on the outer surface of the synchronizer ring 6.

[0039] Each force-enhancing boss 1a is respectively provided with two first force-enhancing surfaces 1a2 and one first positioning surface 1a1.

[0040] The tail of the force boosting pin 9 is symmetrically provided with four second force boosting surfaces 9b and two second positioning surfaces 9a. The second positioning surface 9a of the force boosting pin 9 has the same shape as the first positioning surface 1a1 of the force boosting boss 1a. The first positioning surface 1a1 and the second positioning surface 9a are respectively parallel to the center axis of the synchronizer. The second force boosting surface 9b of the force boosting pin 9 has the same shape as the first force boosting surface 1a2 of the force boosting boss 1a. The middle part of the force boosting pin 9 is a cylindrical surface 9c. The diameter of the cylindrical surface 9c is the same as the width of the waist hole 3a of the sliding sleeve and the diameter of the through hole 4b on the locking ring 4. The length of the waist hole 3a of the sliding sleeve is greater than the diameter of the cylindrical surface 9c of the force boosting pin. The top of the force boosting pin 9 is rectangular, and the width of the top of the force boosting pin 9 is equal to the width of the second notch 5b on the sliding disk 5.

[0041] A blind hole 1b is provided on the outer side of the gear hub 1, and a coil spring 11 and a support pin 10 are inserted into the blind hole 1b in sequence. The coil spring 11 is at the bottom of the blind hole 1b, supporting the bottom of the support pin 10 outward. The bottom of the support pin 10 is a flat surface, and the top is an outer arc surface. When the sleeve 3 is mounted on the gear hub 1, the top of the support pin 10 is pushed into the socket 3b of the sleeve 3, and the coil spring 11 is in a compressed state.

[0042] A connecting block 7 is provided between the two synchronizer rings 6. The connecting block 7 passes through the first notch 5a of the sliding plate 5 and is fixedly installed in the notch 6b of the synchronizer ring 6. The width of the connecting block 7 is equal to the width of the notch 6b of the synchronizer ring 6. The width of the first notch 5a of the sliding plate 5 is greater than the width of the connecting block 7. The connecting block 7 and the synchronizer ring notch 6b are installed by welding or interference fitting to connect the two synchronizer rings 6 into one. A locking boss 6a is provided on the inner side of the synchronizer ring 6. Second locking surfaces 6a1 are provided at both ends of the inner side surface of the locking boss 6a. The number of the second locking surfaces 6a1 of the synchronizer ring is equal to the first locking surface 4a on the same side of the locking ring 4, and the position corresponds.

[0043] Three arc grooves 4c evenly distributed along the circumference are provided on the outer circular surface of the locking ring 4. A pre-synchronization spring 8 is arranged between the locking ring 4 and the connecting block 7. The pre-synchronization spring 8 is fixedly mounted on the connecting block 7. The pre-synchronization spring 8 is provided with an arc surface 8a protruding inwardly. The position of the arc surface 8a corresponds to the position of the arc groove 4c on the locking ring 4.

[0044] The booster pin 9 is connected to the sliding plate 5 as a whole by welding after being installed in place. By installing the booster pin 9 in place and then welding it to the sliding plate 5 as a whole, the sliding sleeve assembly can be split into a sliding sleeve, a locking ring and a sliding plate according to their functions, and then connected through the booster pin 9, thereby realizing the above-mentioned synchronizer booster function. In addition, the welding process makes the connection strength between the booster pin 9 and the sliding plate 5 high, and the axial booster force generated by the booster pin 9 can be reliably transmitted to the sliding plate 5, reducing the risk of separation between the two due to unreliable connection.

[0045] A second friction cone surface 12 a is provided on the inner side of the friction cone disk 12 , and the second friction cone surface 12 a and the first friction cone surface 6 c of the synchronizer ring 6 form a mutual friction surface.

[0046] When in use, first, fix the two friction cones 12 on the two gears 2 respectively; then, sleeve the locking ring 4 on the outer surface of the sliding sleeve 3, so that the through hole 4b corresponds to the waist hole 3a, and then slide the sliding plate 5 on the locking ring, and make the second notch 5b correspond to the through hole 4b of the locking ring 4, and then pass the head of the force-enhancing pin 9 through the waist hole 3a and the through hole 4b in turn and install it into the second notch 5b, and fix the head of the force-enhancing pin 9 with the second notch 5b by welding. At this time, the sliding sleeve 3, the locking ring 5, the sliding plate 6 and the force-enhancing pin 9 are assembled into a sliding sleeve assembly; then , pass the connecting block 7 through the first notch 5a of the sliding plate 5, fix the notches 6b of the synchronizing ring 6 on both sides to the two ends of the connecting block 7, and then install the pre-synchronizing spring 8 into the connecting block 7; then, slide the sliding sleeve assembly with the synchronizing ring assembled on the gear hub 1, so that the internal splines of the sliding sleeve 3 are meshed with the external splines of the gear hub, and when assembling, make the socket 3b of the sliding sleeve 3 correspond to the position of the support pin 10, so that after the assembly is completed, the head of the support pin 10 is pushed into the socket 3b of the sliding sleeve 3, and the arc surface 8a of the pre-synchronizing spring 8 is stuck in the arc groove 4c of the locking ring 4. At this time, a set of automobile gearbox self-amplifying synchronizer assembly and the gears on both sides are assembled.

Claims

1. A self-amplifying synchronizer for an automobile transmission, comprising a gear hub (1), characterized in that: The gear hub (1) is provided with an external spline on the outside, and three pairs of force-enhancing bosses (1a) are evenly arranged on the outside of the gear hub (1). The force-enhancing bosses (1a) are provided with a first positioning surface (1a1) and a first force-enhancing surface (1a2). The gear hub (1) is provided with gear gears (2) on both sides, and a friction cone disk (12) is fixedly installed on each of the two gear gears (2). The gear hub (1) is provided with a sliding sleeve (3) on the outside of the gear hub (1). The inner surface of the sliding sleeve (3) is provided with an internal spline that matches the external spline of the gear hub (1). The sliding sleeve (3) is also provided with a waist-shaped hole (3a) corresponding to the position of the force-enhancing bosses (1a) of the gear hub (1). The sliding sleeve (3) is provided with a locking ring (4) on the outside of the sliding sleeve (3). The two side surfaces of the locking ring (4) are provided with first locking surfaces (4a), and the middle of the locking ring (4) is provided with a through hole (4b); A sliding disk (5) is fixedly mounted on the outer surface of the locking ring (4); a first notch (5a), a second notch (5b) and a third notch (5c) are arranged on the inner surface of the sliding disk (5); the number of the second notches (5b) is equal to the number of the waist-shaped holes (3a) and the through hole (4b); the second notches (5b) are arranged corresponding to the positions of the waist-shaped holes (3a) and the through hole (4b); a force-enhancing pin (9) is arranged at the second notch (5b) on the inner surface of the sliding disk (5); the force-enhancing pin (9) passes through the waist-shaped holes (3a) on the sliding sleeve (3) and the through hole (4b) on the locking ring (4) in sequence, and the top of the force-enhancing pin (9) is fixedly installed in the second notch (5b); the tail of the force-enhancing pin (9) is in sliding contact with the force-enhancing boss (1a) of the gear hub (1); A synchronizer ring (6) is slidably mounted on the outer surface of the locking ring (4) at positions corresponding to both sides of the sliding disk (5), a second locking surface (6a1) and three evenly distributed notches (6b) are provided on the inner side surface of the synchronizer ring (6), and a first friction cone surface (6c) is provided on the outer surface of the synchronizer ring (6); The tail of the force-enhancing pin (9) is symmetrically provided with four second force-enhancing surfaces (9b) and two second positioning surfaces (9a); the second positioning surface (9a) of the force-enhancing pin (9) is of the same shape as the first positioning surface (1a1) of the force-enhancing boss (1a); the first positioning surface (1a1) and the second positioning surface (9a) are respectively parallel to the center axis of the synchronizer; the second force-enhancing surface (9b) of the force-enhancing pin (9) is parallel to the first force-enhancing surface (1a2) of the force-enhancing boss (1a) The force-enhancing pin (9) has the same shape, the middle part of the force-enhancing pin (9) is a cylindrical surface (9c), the diameter of the cylindrical surface (9c) is the same as the width of the waist-shaped hole (3a) of the sliding sleeve and the diameter of the through hole (4b) on the locking ring (4), the length of the waist-shaped hole (3a) of the sliding sleeve is greater than the diameter of the cylindrical surface (9c) of the force-enhancing pin, the top of the force-enhancing pin (9) is rectangular, and the width of the top of the force-enhancing pin (9) is equal to the width of the second notch (5b) on the sliding disk (5); The gear hub (1) is provided with a blind hole (1b) on the outside, and a coil spring (11) and a support pin (10) are inserted into the blind hole (1b) in sequence. The coil spring (11) is at the bottom of the blind hole (1b) and supports the bottom of the support pin (10) outwardly. The bottom of the support pin (10) is a flat surface, and the top is an outer arc surface. When the sliding sleeve (3) is sleeved on the gear hub (1), the top of the support pin (10) is pushed into the socket (3b) of the sliding sleeve (3), and at this time, the coil spring (11) is in a compressed state. A connecting block (7) is provided between the two synchronizer rings (6). The connecting block (7) passes through the first notch (5a) of the sliding disk (5) and is fixedly installed in the notch (6b) of the synchronizer ring (6). The width of the connecting block (7) is equal to the width of the notch (6b) of the synchronizer ring (6). The width of the first notch (5a) of the sliding disk (5) is greater than the width of the connecting block (7). The connecting block (7) and the notch (6b) of the synchronizer ring are installed by welding or interference fitting to connect the two synchronizer rings (6) into one. A locking boss (6a) is provided on the inner side of the synchronizer ring (6). Both ends of the inner side surface of the locking boss (6a) are provided with second locking surfaces (6a1). The number of the second locking surfaces (6a1) of the synchronizer ring is equal to that of the first locking surface (4a) on the same side of the locking ring (4) and the positions are corresponding.

2. The self-amplifying synchronizer for an automobile transmission according to claim 1, characterized in that: Each of the force-enhancing bosses (1a) is respectively provided with two first force-enhancing surfaces (1a2) and a first positioning surface (1a1).

3. The self-amplifying synchronizer for an automobile transmission according to claim 1, characterized in that: The outer circumferential surface of the locking ring (4) is provided with three circular arc grooves (4c) evenly distributed along the circumference; a pre-synchronization spring (8) is arranged between the locking ring (4) and the connecting block (7); the pre-synchronization spring (8) is fixedly mounted on the connecting block (7); the pre-synchronization spring (8) is provided with an arc surface (8a) protruding inwardly; the position of the arc surface (8a) corresponds to the position of the circular arc groove (4c) on the locking ring (4).

4. The self-amplifying synchronizer for an automobile transmission according to claim 1, characterized in that: The force-enhancing pin (9) is connected to the sliding plate (5) as a whole by welding after being installed in place.

5. The self-amplifying synchronizer for an automobile transmission according to claim 1, characterized in that: A second friction cone surface (12a) is provided on the inner side of the friction cone disk (12), and the second friction cone surface (12a) and the first friction cone surface (6c) of the synchronization ring (6) form a mutual friction surface.

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