A gearbox synchroniser

Abstract

The utility model relates to a kind of gearbox synchronizer, including tooth cover, tooth hub, the outer cone ring being equipped with first inner taper face, the intermediate taper ring being equipped with first outer taper face and second inner taper face, the inner taper ring being equipped with second outer taper face, gear, shaft, spring and push block;It further includes the connecting gear of transmission connection and synchronous rotation with gear;Several recesses are evenly provided on the circumference of tooth hub, and connecting block is movably embedded in recess;First through slot and second through slot are provided on connecting block;First boss extends into first through slot, and third boss extends into second through slot;Through hole is provided on connecting gear, and second boss is provided on intermediate taper ring, and second boss extends into through hole.The gearbox synchronizer of the utility model is easy to maintain and operate, has less component replacement, high efficiency and low cost.

Description

Technical Field

[0001] This utility model relates to a gearbox synchronizer and belongs to the field of vehicle manufacturing technology. Background Technology

[0002] A gearbox synchronizer is a mechanical device used to ensure smooth gear engagement during gear shifting, preventing shock and damage. The synchronizer achieves this by bringing the gears to a uniform speed, thus facilitating the shifting process. However, existing synchronizers typically rely on friction from a conical surface structure to synchronize speeds and transmit torque during gear shifting. This friction-related process makes multiple components prone to wear and failure, especially under high-torque synchronization conditions. This leads to a shortened synchronizer lifespan, requiring frequent maintenance and often necessitating the replacement of numerous components, resulting in relatively high costs.

[0003] Chinese patent CN106402189B discloses a synchronizer and gearbox. The synchronizer includes a gear sleeve, a gear hub, an outer cone ring, a middle cone ring, an inner cone ring, a cone, a spring, and a push block. This solution, based on the existing double-cone synchronizer, adds conical surface friction between the inner cone ring and the cone to form a triple-cone synchronizer. This can increase the synchronizing torque without increasing the radial dimension of the product, thereby shortening the shift synchronization time. A clearance part consisting of through holes and / or through grooves is opened on the gear hub. The boss on the outer cone ring and the claw on the inner cone ring extend into the clearance part. This can reduce the axial dimension of the synchronizer and shorten the shift stroke of the synchronizer. Thus, while keeping the shift distance in the cab unchanged, the overall shift lever ratio can be increased to reduce the shifting operation force. The friction components involved in this solution mainly include an outer conical ring, an intermediate conical ring, and an inner conical ring, all of which are independent components and can be replaced individually after wear. At the same time, the above three components are inserted into the through holes, through slots, and connecting holes of the gear hub or cone through protruding structures such as bosses and claws to realize the power transmission between the gear hub and the cone. Under high torque synchronization, these connecting parts are also prone to wear, resulting in the gear hub and cone still needing to be replaced frequently. Maintenance requires disassembly and replacement of many components, which is cumbersome, inefficient, and increases maintenance costs.

[0004] Therefore, there is an urgent need for a gearbox synchronizer that is easy to maintain and operate, requires fewer parts replacements, is highly efficient, and has low cost. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a gearbox synchronizer that is easy to maintain and operate, requires fewer parts replacements, is highly efficient, and has low cost.

[0006] The purpose of this utility model is achieved as follows:

[0007] A gearbox synchronizer includes a gear sleeve, a gear hub, an outer conical ring with a first inner conical surface, an intermediate conical ring with a first outer conical surface and a second inner conical surface, an inner conical ring with a second outer conical surface, a gear, a shaft, a spring, and a push block; the first inner conical surface mates with the first outer conical surface, and the second inner conical surface mates with the second outer conical surface; the outer conical ring has a first boss, and the inner conical ring has a third boss; it also includes a connecting gear that is driven and synchronously rotates with the gear.

[0008] The gear hub has several grooves evenly distributed around its circumference, and a connecting block is movably embedded in the grooves; the connecting block has a first through groove and a second through groove; the first boss extends into the first through groove, and the third boss extends into the second through groove.

[0009] The connecting gear has a through hole, and the intermediate cone ring has a second boss that extends into the through hole.

[0010] Preferably, the inner contour shape of the groove is adapted to the outer contour shape of the connecting block.

[0011] Preferably, the inner contour shape of the groove is U-shaped.

[0012] Preferably, three grooves are evenly formed on the gear hub, and three connecting blocks are respectively embedded therein.

[0013] Preferably, the outer conical ring has three first protrusions, which respectively extend into the first through grooves of the three connecting blocks; the inner conical ring has three third protrusions, which respectively extend into the second through grooves of the three connecting blocks.

[0014] Preferably, the connecting gear has six through holes evenly distributed on the same circumference, and the intermediate conical ring has six corresponding second bosses extending into the corresponding six through holes.

[0015] Preferably, the connecting block includes two first through slots and one second through slot; the three through slots are distributed on the circumference of concentric circles with the axis center line as the axis, wherein the two first through slots are located on the same large-diameter concentric circle circumference, and the one second through slot is located on the small-diameter concentric circle circumference, and the three through slots are distributed in a triangular shape.

[0016] Preferably, a first through groove accommodates a first boss, and a second through groove accommodates two third bosses extending side by side.

[0017] Preferably, there are two sets of the outer conical ring, the middle conical ring, the inner conical ring, the gear shifting gear, and the connecting gear, and each set is respectively located on the left and right sides of the gear hub.

[0018] Preferably, the gear hub and the shaft are connected by a spline and rotate synchronously; the connecting gear and the gear shifting gear are connected by a spline and rotate synchronously.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention utilizes a connecting block movably embedded in the gear hub, employing a connection structure that connects the connecting block with the bosses and through slots of the outer and inner conical rings to transmit torque, thus protecting the main structure of the gear hub from wear under high torque conditions. A connecting gear is positioned between the shift gear and the intermediate conical ring, using a connection structure that connects the connecting gear with the bosses and through holes of the intermediate conical ring to transmit torque, protecting the shift gear from wear under high torque conditions. The inner and outer conical surfaces of the intermediate conical ring respectively rub against the conical surfaces of the outer and inner conical rings to transmit torque, achieving a synchronous function by transmitting torque between the gear hub and the shift gear. Under high torque conditions, the most wear-prone areas are controlled to five small parts: the outer conical ring, the intermediate conical ring, the inner conical ring, the connecting block, and the connecting gear. Maintenance only requires replacing these small parts, simplifying maintenance operations, improving efficiency, and reducing costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a gearbox synchronizer according to the present invention.

[0022] Figure 2 This is a schematic diagram of the gear hub structure of a gearbox synchronizer according to the present invention.

[0023] Figure 3 This is a schematic diagram of the connecting block structure of a gearbox synchronizer according to the present invention.

[0024] Figure 4 This is a schematic diagram of the outer cone ring structure of a gearbox synchronizer according to the present invention.

[0025] Figure 5 This is a schematic diagram of the intermediate cone ring structure of a gearbox synchronizer according to the present invention.

[0026] Figure 6 This is a schematic diagram of the inner cone ring structure of a gearbox synchronizer according to the present invention.

[0027] Figure 7 This is a schematic diagram of the gearbox synchronizer structure according to the present invention.

[0028] Figure 8 This is a schematic diagram of the connecting gear structure of a gearbox synchronizer according to the present invention.

[0029] Figure 9 This is a schematic diagram of the gear sleeve structure of a gearbox synchronizer according to the present invention.

[0030] in:

[0031] 1. Gear sleeve; 2. Gear hub; 3. Outer conical ring; 4. Middle conical ring; 5. Inner conical ring; 6. Gear position gear; 7. Shaft; 8. Connecting gear; 9. Spring; 10. Push block.

[0032] Groove 21, connecting block 22, first through groove 23, second through groove 24, first boss 31, second boss 41, third boss 51, through hole 81. Detailed Implementation

[0033] See Figures 1-9 This utility model relates to a gearbox synchronizer, comprising a gear sleeve 1, a gear hub 2, an outer conical ring 3 with a first inner conical surface, an intermediate conical ring 4 with a first outer conical surface and a second inner conical surface, an inner conical ring 5 with a second outer conical surface, a gear 6, a shaft 7, a connecting gear 8 that is driven and rotates synchronously with the gear 6, a spring 9, and a push block 10; the first inner conical surface mates with the first outer conical surface, and the second inner conical surface mates with the second outer conical surface; the outer conical ring 3, the intermediate conical ring 4, the inner conical ring 5, the gear 6, and the connecting gear 8 are all in two sets, and each is respectively disposed on the shaft 7 on the left and right sides of the gear hub 2, wherein the gear 6 is rotatably disposed on the shaft 7 or the gear hub 2, and in this embodiment, the gear 6 is rotatably disposed on the gear hub 2; the gear hub 2 and the shaft 7 are connected by a spline and rotate synchronously; the connecting gear 8 and the gear 6 are connected by a spline and rotate synchronously; before synchronization, there is no transmission connection between the gear hub 2 and the gear 6;

[0034] Three grooves 21 are evenly distributed on the circumference of the gear hub 2, and three connecting blocks 22 are movably embedded in the three grooves 21 respectively. The inner contour shape of the groove 21 matches the outer contour shape of the connecting block 22. In this embodiment, the inner contour shape of the groove 21 is U-shaped. When the gear hub 2 rotates, the groove 21 drives the connecting block 22 to rotate synchronously. Two first through slots 23 and one second through slot 24 are provided on the connecting block 22. The three through slots are distributed on the circumference of a concentric circle with the center line of shaft 7 as the axis. The two first through slots 23 are located on the same large-diameter concentric circle, and the one second through slot 24 is located on the small-diameter concentric circle. The three through slots are distributed in a triangular pattern. Six through holes 81 are evenly distributed on the same circumference on the connecting gear 8.

[0035] The outer conical ring 3 is provided with three first protrusions 31, which extend into the first through slots 23 of the three connecting blocks 22 and rotate synchronously with the connecting blocks 22. Since there are two outer conical rings 3 on both sides of the gear hub 2, there are a total of six first protrusions 31, and the three connecting blocks 22 have a total of six first through slots 23. The six first protrusions 31 are matched one-to-one with the six first through slots 23, that is, each first through slot 23 only accommodates one first protrusion 31. Through the above-mentioned matching structure of the first protrusions 31 and the first through slots 23, the outer conical ring 3 and the connecting blocks 22 rotate synchronously.

[0036] The inner conical ring 5 is provided with three third protrusions 51; the three third protrusions 51 extend into the second through slots 24 of the three connecting blocks 22 and rotate synchronously with the connecting blocks 22; since there are two inner conical rings 5 ​​on both sides of the gear hub 2, there are a total of six third protrusions 51, and the three connecting blocks 22 have a total of three second through slots 24. The six third protrusions 51 extend into the three second through slots 24 respectively, that is, each second through slot 24 accommodates two third protrusions 51 extending side by side. Through the above-mentioned cooperation structure of the third protrusions 51 and the second through slots 24, the inner conical ring 5 and the connecting blocks 22 rotate synchronously.

[0037] Since the connecting block 22 and the gear hub 2 are engaged through the groove 21, the connecting block 22 and the gear hub 2 rotate synchronously. Therefore, the four components, namely the outer cone ring 3, the inner cone ring 5, the connecting block 22 and the gear hub 2, rotate synchronously.

[0038] The intermediate cone ring 4 is provided with six second protrusions 41, which extend into the six corresponding through holes 81 of the connecting gear 8 and rotate synchronously with the connecting gear 8. Since the connecting gear 8 and the gear 6 are splinedly connected, the three components of the intermediate cone ring 4, the connecting gear 8 and the gear 6 rotate synchronously.

[0039] When the gearbox shifts gears synchronously, the gear sleeve 1 moves to the left (right), which drives the push block 10 to move to the left (right). The push block 10 pushes the left (right) outer cone ring 3 to the left (right). Utilizing the cone surface structure, the outer cone ring 3 gradually presses the middle cone ring 4 against the inner cone ring 5. By utilizing the frictional cooperation between the two sets of cone surfaces between the three cone rings, the speeds of the three cone rings are gradually synchronized, thereby synchronizing the rotational speeds of the left (right) gear 6 and the gear hub 2, thus preparing for the completion of the gear shift.

[0040] In the above synchronization process, among the components that transmit torque, the three cone rings are set as independent components, and the outer cone ring 3, inner cone ring 5 and gear hub 2 transmit torque through independent connecting blocks 22. The middle cone 4 transmits torque through independent connecting gear 8 and gear 6. Therefore, each link in the torque transmission is set as an independent component.

[0041] During torque transmission, the two sets of conical friction surfaces between the outer conical ring 3, the intermediate conical ring 4, and the inner conical ring 5 are among the most prone to wear. Additionally, the boss-slot mating structure between the outer conical ring 3, the inner conical ring 5, and the connecting block 22 is another prone to wear, as is the boss-through-hole mating structure between the intermediate conical ring 4 and the connecting gear 8. When wear occurs, only the outer conical ring 3, the intermediate conical ring 4, the inner conical ring 5, the connecting block 22, or the connecting gear 8 needs to be replaced. The gear hub 2 and the gear shifting gear 6, as key components, are protected and do not require replacement. This simplifies disassembly and assembly during maintenance, improves maintenance efficiency, and reduces maintenance costs because the replacement parts are all small.

[0042] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A gearbox synchronizer, comprising a gear sleeve (1), a gear hub (2), an outer conical ring (3) having a first inner conical surface, an intermediate conical ring (4) having a first outer conical surface and a second inner conical surface, an inner conical ring (5) having a second outer conical surface, a gear (6), a shaft (7), a spring (9), and a pusher (10); the first inner conical surface engages with the first outer conical surface, and the second inner conical surface engages with the second outer conical surface; the outer conical ring (3) has a first boss (31), and the inner conical ring (5) has a third boss (51), characterized in that: It also includes a connecting gear (8) that is connected to the gear position gear (6) and rotates synchronously. The toothed hub (2) has several grooves (21) evenly distributed on its circumference, and a connecting block (22) is movably embedded in the groove (21); the connecting block (22) has a first through groove (23) and a second through groove (24); the first boss (31) extends into the first through groove (23), and the third boss (51) extends into the second through groove (24); The connecting gear (8) has a through hole (81), and the intermediate cone ring (4) has a second boss (41) that extends into the through hole (81).

2. The gearbox synchronizer according to claim 1, characterized in that: The inner contour shape of the groove (21) is adapted to the outer contour shape of the connecting block (22).

3. The gearbox synchronizer according to claim 2, characterized in that: The inner contour of the groove (21) is U-shaped.

4. The gearbox synchronizer according to claim 1, characterized in that: Three grooves (21) are evenly opened on the gear hub (2), and three connecting blocks (22) are respectively embedded therein.

5. The gearbox synchronizer according to claim 4, characterized in that: The outer conical ring (3) is provided with three first protrusions (31), which respectively extend into the first through grooves (23) of the three connecting blocks (22); the inner conical ring (5) is provided with three third protrusions (51), which respectively extend into the second through grooves (24) of the three connecting blocks (22).

6. The gearbox synchronizer according to claim 1, characterized in that: The connecting gear (8) has six through holes (81) evenly distributed on the same circumference, and the intermediate cone ring (4) has six corresponding second bosses (41) extending into the corresponding six through holes (81).

7. The gearbox synchronizer according to claim 1, characterized in that: The connecting block (22) includes two first through slots (23) and one second through slot (24); the three through slots are distributed on the circumference of a concentric circle with the center line of the shaft (7) as the axis, wherein the two first through slots (23) are located on the same large diameter concentric circle, and the one second through slot (24) is located on the small diameter concentric circle, and the three through slots are distributed in a triangular shape.

8. The gearbox synchronizer according to claim 7, characterized in that: A first through slot (23) accommodates a first boss (31), and a second through slot (24) accommodates two third bosses (51) extending side by side.

9. The gearbox synchronizer according to claim 1, characterized in that: The outer conical ring (3), the middle conical ring (4), the inner conical ring (5), the gear (6), and the connecting gear (8) are all in two sets, and each is respectively set on the left and right sides of the gear hub (2).

10. The gearbox synchronizer according to claim 1, characterized in that: The gear hub (2) is connected to the shaft (7) by a spline and rotates synchronously; the connecting gear (8) is connected to the gear position gear (6) by a spline and rotates synchronously.

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