CN116164052A - Synchronizer ring structure - Google Patents

Abstract

The invention provides a synchronizer ring structure, which belongs to the field of auto parts. It solves the problem of poor life of the existing ring gear. The gear ring structure of the synchronizer includes an outer ring and an inner ring. An annular shoulder is formed on the inner wall of the lower end of the outer ring, and the bottom surface of the inner ring is pressed tightly on the annular shoulder. The annular cavity is provided with a plastic ring. The plastic ring is formed in the annular cavity by injection molding and becomes a whole with the inner ring and the outer ring; A circle of bar-shaped groove 2 is axially arranged on the inner wall, and the inner wall of the plastic ring extends in the direction of the bar-shaped groove 1 and is integrally formed with a key block 1 matching the bar-shaped groove 1, and the outer wall of the plastic ring extends in the direction of the bar-shaped groove 2 and is integrally formed with Key block two matched with bar groove two. The ring structure of the synchronizer has a long service life.

Description

Synchronizer ring structure

technical field

The invention belongs to the field of auto parts, and relates to a synchronizer, in particular to a synchronizer ring structure.

Background technique

The synchronizer gear ring is an important part of the automobile transmission system. Its structure is like a friction ring of a synchronizer proposed by the applicant (application number: 201721296178.0), including a cone-shaped outer ring. ring, the inner side wall of the outer ring is provided with a shoulder, one end of the inner ring is against the inner end surface of the shoulder, and the inner side wall of the other end of the outer ring is provided with an annular groove, and a retaining ring is arranged in the annular groove, and the retaining ring The spring leans against the other end surface of the inner ring.

When the synchronizer ring is in use, after the friction surface of the inner ring contacts the outer surface of the gear ring to be joined, under the action of friction torque, the two rotate synchronously, and the speed of the gear to be joined relative to the ring gear is zero, and with the gear The ring moves so that the teeth on the ring gear engage the teeth of the gear to be engaged, thus completing the shift. However, during the shifting operation, the movement of the gear ring will produce a certain radial impact, which will cause the gear ring to move and vibrate, resulting in collision and meshing between the gear ring and the gear to be engaged.

Contents of the invention

The object of the present invention is to propose a synchronizer ring structure with long service life in view of the above-mentioned problems in the prior art.

The object of the present invention can be achieved through the following technical solutions: the synchronizer gear ring structure includes an outer ring and an inner ring arranged coaxially, a ring gear is formed on the outer wall of the lower end of the outer ring, and an annular shoulder is formed on the inner wall of the lower end of the outer ring. And the bottom surface of the inner ring is tightly pressed on the annular shoulder, which is characterized in that an annular cavity is formed between the inner ring, the outer ring and the annular shoulder, and the annular cavity and the outer ring are coaxially arranged; the annular cavity is provided with shapes and A plastic ring whose size matches the annular cavity. The plastic ring is molded in the annular cavity by injection molding and becomes a whole with the inner ring and the outer ring; There is a circle of strip-shaped groove 2 axially arranged on the wall, and the upper end of the strip-shaped groove 2 is open; both strip-shaped groove 1 and strip-shaped groove 2 are connected to the above-mentioned annular cavity; the inner wall of the plastic ring extends in the direction of strip-shaped groove 1 The key block 1 matched with the bar groove 1, the number of key blocks 1 and the bar groove 1 are the same and the positions are one-to-one correspondence; the outer wall of the plastic ring extends in the direction of the bar groove 2, and the key block 2 matching the bar groove 2 is integrally formed. The second key block and the second bar groove have the same number and one-to-one correspondence.

The inner ring and the outer ring are completely connected as a whole through the plastic ring between the two by injection molding, and the key block 1 and the bar-shaped groove 1 and the key block 2 and the bar-shaped groove 2 are used to cooperate to ensure the inner ring and the outer ring. Under the premise of stable transmission, an elastic protective layer is formed between the inner ring and the outer ring, so as to use the elasticity of the plastic ring to buffer the radial force transmitted from the inner ring, so that the meshing process of the ring gear is smoother and more effective Reduce the probability of breakage of the ring gear when meshing, and improve the life of the synchronizer ring.

In the above-mentioned synchronizer ring structure, a ring of connecting holes axially penetrates the annular shoulder, and the upper end of each connecting hole is connected to the above-mentioned annular cavity, and the plastic ring extends in the direction of the connecting hole and is integrally formed with a ring matching the connecting hole. Positioning posts, the positioning posts and connecting holes have the same number and one-to-one correspondence. The connection hole is not only used to discharge the air in the ring cavity, so that the injection molding process can be carried out stably, but also can form a positioning column to effectively improve the bonding strength of the plastic ring and the outer ring, thereby further enhancing the overall structural stability of the gear ring.

In the above synchronizer ring structure, the connection hole is composed of an upper hole and a lower hole arranged coaxially, and the diameter of the upper hole is smaller than the width of the annular cavity and the diameter of the lower hole. With the above design, the connecting column has a small top and a large bottom structure, and the diameter of the upper end of the connecting column is smaller than the width of the annular cavity to form an axial limit, and the plastic ring can be better locked between the inner ring and the outer ring to fully play the buffer Effect, so that the purpose of prolonging the life of the gear ring can be realized stably.

In the above synchronizer gear ring structure, a plurality of buffer holes are formed in the plastic ring, that is, the inner part of the plastic ring is hollowed out to form an air layer, so as to further enhance the buffering effect of the plastic ring.

In the above synchronizer gear ring structure, the buffer holes are straight and extend in the axial direction of the plastic ring, a plurality of buffer holes are evenly distributed along the circumference of the plastic ring, and the upper ports of the buffer holes are located on the top surface of the plastic ring. The buffer hole is set vertically, which can better buffer the radial force, thereby further prolonging the life of the gear ring.

In the aforementioned structure of the synchronizer gear ring, the buffer hole is a blind hole, and the bottom surface of the buffer hole is an arc surface to ensure the overall strength of the plastic ring.

In the aforementioned structure of the synchronizer ring gear, the upper end of the outer ring is fixed with a pressing piece that makes the inner ring move downward, so as to further limit the inner ring in the axial direction and make the ring gear structure more stable.

In the above-mentioned structure of the synchronizer gear ring, the pressing piece is in the form of a ring, the pressing piece is coaxial with the inner ring, and the bottom surface of the pressing piece is tightly pressed against the top surface of the inner ring.

In the above synchronizer gear ring structure, the bottom surface of the pressing piece is also pressed against the top surface of the plastic ring and at the same time the openings of all the buffer holes are closed to prevent impurities such as wear and debris from entering the buffer holes, so that the plastic ring can play a stable role in buffering. Effect.

The pressing piece can not only further limit the inner ring in the axial direction, strengthen the structural stability of the gear ring, but also be used to close the buffer hole orifice. That is to say, in this application, the pressing piece has a double-purpose effect. Easy to assemble.

In the above synchronizer gear ring structure, the pressing piece is an annular circlip, and an annular circlip groove for installing the annular circlip is opened on the inner wall of the outer ring. The above-mentioned design has the advantages of simple structure and convenient assembly.

As another solution, in the above-mentioned structure of the synchronizer ring gear, the pressing member is a plurality of pressing blocks uniformly distributed along the circumference of the outer ring, and each pressing block is tightly pressed on the top surface of the inner ring.

Compared with the prior art, the synchronizer ring structure has the following advantages:

1. The inner ring and the outer ring are completely connected as a whole through the plastic ring between the two by injection molding, and the key block 1 and the bar groove 1 and the key block 2 and the bar groove 2 are used to ensure the inner ring and the bar groove. Under the premise of stable transmission of the outer ring, an elastic protective layer is formed between the inner ring and the outer ring to use the elasticity of the plastic ring to buffer the radial force transmitted from the inner ring, so that the meshing process of the ring gear is smoother. In order to effectively reduce the probability of breaking the ring gear when meshing, and improve the life of the synchronizer ring.

2. The connection hole is not only used to discharge the air in the annular cavity, so that the injection molding process can be carried out stably, but also can form a positioning column to effectively improve the bonding strength between the plastic ring and the outer ring, thereby further strengthening the overall structural stability of the gear ring.

3. The pressing piece can not only further limit the inner ring in the axial direction, strengthen the structural stability of the gear ring, but also be used to close the buffer hole orifice. That is, in this application, the pressing piece has the effect of one thing with dual purposes. At the same time, it is convenient to assemble.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the synchronizer ring.

Fig. 2 is a schematic diagram of the structure of the outer ring.

Fig. 3 is a schematic diagram of the structure of the plastic ring.

Fig. 4 is a structural schematic diagram of the inner ring.

In the figure, 1, the outer ring; 1a, the ring gear; 1b, the annular shoulder; 1c, the second bar groove; 1d, the connection hole; 1d1, the upper hole; 1d2, the lower hole; 2, the inner ring; 2a, the separation groove ; 2b, strip groove one; 3, plastic ring; 3a, key block one; 3b, key block two; 3c, positioning column; 3d, buffer hole; 4, pressing piece.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

Embodiment one

As shown in FIG. 1 , the synchronizer ring structure includes an outer ring 1 and an inner ring 2 arranged coaxially.

in,

A ring gear 1a is formed on the outer wall of the lower end of the outer ring 1, and a ring gear 1a is formed on the inner wall of the lower end of the outer ring 1.

Ring-shaped shoulder 1b, the ring-shaped shoulder 1b and the outer ring 1 are coaxially arranged, and the two are integrated

structure.

The inner ring 2 is located in the outer ring 1, and the bottom surface of the inner ring 2 is pressed against the annular shoulder 1b. In the actual product, friction textures are provided on the inner surface of the inner ring 2, and a circle of separation grooves 2a vertically penetrates the inner surface of the inner ring 2, and the separation grooves 2a divide the friction textures into multiple small pieces uniformly distributed along the circumference of the inner ring 2.

As shown in FIG. 2 , FIG. 3 and FIG. 4 , an annular cavity is formed among the inner ring 2 , the outer ring 1 and the annular shoulder 1 b, and the annular cavity and the outer ring 1 are coaxially arranged. A plastic ring 3 whose shape and size match the annular cavity is provided in the annular cavity, and the plastic ring 3 is molded in the annular cavity by injection molding and forms an integral body with the inner ring 2 and the outer ring 1 . To further illustrate, a circle of bar-shaped grooves 2b is axially penetrated on the outer wall of the inner ring 2, and a circle of bar-shaped grooves 1c is axially arranged on the inner wall of the outer ring 1, and the upper end of the bar-shaped grooves 1c is open; 2b and strip groove two 1c are all connected to the above-mentioned annular cavity; the inner wall of the plastic ring 3 extends toward the direction of strip groove one 2b and is integrally formed with a key block one 3a matching the strip groove one 2b, key block one 3a and the strip groove The number of one 2b is the same and the positions correspond to each other; the outer wall of the plastic ring 3 extends toward the direction of the second strip groove 1c, and the key block two 3b matching the second strip groove 1c is integrally formed, and the number of the key block two 3b and the second strip groove 1c are the same And the positions correspond to each other.

The inner ring 2 and the outer ring 1 are completely connected as a whole by injection molding the plastic ring 3 between the two, and the key block 3a is used to cooperate with the bar-shaped groove 1 2b and the key block 2 3b is matched with the bar-shaped groove 2 1c, On the premise of ensuring the smooth transmission of the inner ring 2 and the outer ring 1, an elastic protective layer is formed between the inner ring 2 and the outer ring 1, so as to use the elasticity of the plastic ring 3 to buffer the radial action transmitted from the inner ring 2 Force, so that the meshing process of the ring gear 1a is smoother, so as to effectively reduce the probability of breaking the ring gear 1a when meshing, and improve the life of the synchronizer ring.

To further illustrate, a ring of connection holes 1d is axially penetrated on the annular shoulder 1b, and the upper end of each connection hole 1d is connected to the above-mentioned annular cavity, and the plastic ring 3 extends in the direction of the connection hole 1d and is integrally formed with a positioning The posts 3c, the positioning posts 3c and the connection holes 1d are the same in number and correspond to each other. The connection hole 1d is not only used to discharge the air in the annular cavity, so that the injection molding process can be carried out stably, but also can form the positioning column 3c, so as to effectively improve the bonding strength between the plastic ring 3 and the outer ring 1, thereby further enhancing the overall structural stability of the gear ring.

Wherein, the structure of the connecting hole 1d is as follows: the connecting hole 1d is composed of an upper hole 1d1 and a lower hole 1d2 arranged coaxially, and the upper hole 1d1 is connected to the small hole. Among them, the diameter of the upper hole 1d1 is smaller than the width of the annular cavity and the diameter of the lower hole 1d2. At this time, the connecting column has a structure with a small upper part and a large lower part, and the diameter of the upper end of the connecting column is smaller than the width of the annular cavity to form an axial limit. The plastic ring 3 It is better locked between the inner ring 2 and the outer ring 1, and the cushioning effect is fully exerted, so that the purpose of prolonging the service life of the gear ring can be stably realized.

As shown in FIG. 1 and FIG. 3 , a plurality of buffer holes 3 d are formed in the plastic ring 3 , that is, the inner part of the plastic ring 3 is hollowed out to form an air layer, so as to further enhance the buffering effect of the plastic ring 3 . Preferably, the buffer hole 3d is straight and extends along the axial direction of the plastic ring 3 , the buffer hole 3d is a blind hole, and the bottom surface of the buffer hole 3d is an arc surface, so as to ensure the overall strength of the plastic ring 3 . A plurality of buffer holes 3 d are evenly distributed along the circumference of the plastic ring 3 , and the upper ports of the buffer holes 3 d are located on the top surface of the plastic ring 3 . The buffer hole 3d is arranged vertically, which can better buffer the radial force, thereby further prolonging the service life of the gear ring.

In order to further strengthen the positioning strength of the inner ring 2, the application also fixes a pressing piece 4 on the upper end of the outer ring 1 to make the inner ring 2 move downward, so as to further limit the inner ring 2 in the axial direction and make the ring gear structure more stable. for stability.

Preferably, the pressure piece 4 is in the shape of a ring, the pressure piece 4 is coaxial with the inner ring 2 , and the bottom surface of the pressure piece 4 is tightly pressed against the top surface of the inner ring 2 . To further illustrate, the bottom surface of the pressing piece 4 also presses against the top surface of the plastic ring 3 and simultaneously closes the openings of all the buffer holes 3d to prevent impurities such as wear and debris from entering the buffer holes 3d, so that the plastic ring 3 can stably exert a buffering effect. The pressing piece 4 can not only further limit the inner ring 2 in the axial direction, strengthen the structural stability of the gear ring, but also be used to close the buffer hole 3d orifice. Simplify the structure and facilitate assembly.

In the actual product, the pressing piece 4 is an annular circlip, and the inner wall of the outer ring 1 is provided with an annular circlip groove for installing the annular circlip. The above-mentioned design has the advantages of simple structure and convenient assembly.

Embodiment two

The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that the pressure piece 4 is a plurality of pressing blocks uniformly distributed along the circumference of the outer ring 1, and each pressing block is tightly pressed against the top of the inner ring 2. face.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (10)

1. Synchronizer gear ring structure, including outer ring (1) and inner ring (2) arranged coaxially, ring gear (1a) is formed on the outer wall of the lower end of the outer ring (1), and formed on the inner wall of the lower end of the outer ring (1) There is an annular shoulder (1b), and the bottom surface of the inner ring (2) is tightly pressed on the annular shoulder (1b), and it is characterized in that the inner ring (2), the outer ring (1) and the annular shoulder (1b) An annular cavity is formed between them, and the annular cavity and the outer ring (1) are coaxially arranged; a plastic ring (3) whose shape and size match the annular cavity is arranged in the annular cavity, and the plastic ring (3) is formed on the annular cavity by injection molding. The cavity is formed as a whole with the inner ring (2) and the outer ring (1); a circle of bar-shaped grooves (2b) runs through the outer wall of the inner ring (2) axially, and the inner wall of the outer ring (1) is axially There is a circle of strip-shaped groove two (1c), and the upper end of strip-shaped groove two (1c) is open; strip-shaped groove one (2b) and strip-shaped groove two (1c) are connected to the above-mentioned annular cavity; plastic ring (3) The inner wall extends toward the bar-shaped groove 1 (2b) and is integrally formed with a key block 1 (3a) matching the bar-shaped groove 1 (2b). The key block 1 (3a) and the bar-shaped groove 1 (2b) have the same number and position One correspondence; the outer wall of the plastic ring (3) extends toward the direction of the second bar-shaped groove (1c) and integrally formed with the second key block (3b) matching the second bar-shaped groove (1c), the second key block (3b) and the second bar-shaped groove (1c) The number is the same and the positions correspond to each other. 2. The synchronizer ring structure according to claim 1, characterized in that a ring of connecting holes (1d) axially penetrates the annular shoulder (1b), and the upper end of each connecting hole (1d) communicates with the above-mentioned In the annular cavity, the plastic ring (3) extends toward the connection hole (1d) and is integrally formed with a positioning post (3c) matching the connection hole (1d). The number of positioning posts (3c) and the connection hole (1d) are the same and the positions are one by one. correspond. 3. The synchronizer ring structure according to claim 2, characterized in that the connecting hole (1d) is composed of an upper hole (1d1) and a lower hole (1d2) arranged coaxially, and the diameter of the upper hole (1d1) is equal to Smaller than the width of the annular cavity and the diameter of the lower hole (1d2). 4. The synchronizer ring structure according to claim 1, characterized in that a plurality of buffer holes (3d) are formed in the plastic ring (3). 5. The synchronizer ring structure according to claim 4, characterized in that, the buffer holes (3d) are straight and the length extends axially along the plastic ring (3), and a plurality of buffer holes (3d) extend along the plastic ring (3) uniformly distributed in the circumferential direction, and the upper port of the buffer hole (3d) is located on the top surface of the plastic ring (3). 6. The synchronizer ring structure according to claim 5, characterized in that the buffer hole (3d) is a blind hole, and the bottom surface of the buffer hole (3d) is an arc surface. 7 . The synchronizer ring structure according to claim 5 or 6 , characterized in that, the upper end of the outer ring ( 1 ) is fixed with a pressing piece ( 4 ) that makes the inner ring ( 2 ) move downward. 8. The synchronizer ring structure according to claim 7, characterized in that the pressure piece (4) is annular, the pressure piece (4) is coaxial with the inner ring (2), and the bottom surface of the pressure piece (4) is tightly pressed On the top surface of the inner ring (2). 9. The synchronizer ring structure according to claim 8, characterized in that the bottom surface of the pressing piece (4) also presses on the top surface of the plastic ring (3) and simultaneously closes the openings of all buffer holes (3d). 10. The synchronizer ring structure according to claim 8, characterized in that the pressing piece (4) is an annular circlip, and the inner wall of the outer ring (1) is provided with an annular circlip for installing the annular circlip spring groove.

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