Improved structure of a synchronous ring

Abstract

The application provides a synchronous ring with improved structure, and belongs to the field of automobile accessories. The synchronous ring with improved structure solves the problem of poor service life of the existing synchronous ring. The synchronous ring with improved structure comprises an outer ring and an inner ring coaxially arranged, a gear ring is formed on the outer wall of the lower end of the outer ring, an annular shoulder is formed on the inner wall of the lower end of the outer ring, the bottom surface of the inner ring is tightly pressed on the annular shoulder, a rubber ring is vertically arranged between the inner ring and the outer ring, the inner and outer sides of the rubber ring are tightly attached to the inner ring and the outer ring respectively, and the bottom surface of the rubber ring is pressed on the top surface of the annular shoulder; an annular groove is coaxially arranged on the annular shoulder and faces the inner ring, a plurality of protruding columns are integrally formed on the bottom surface of the inner ring, and all the protruding columns are inserted into the annular groove; an injection hole is arranged on the bottom surface of the annular shoulder and is communicated with the annular groove, the annular groove is filled with plastic by injection molding to form a plastic ring, and all the protruding columns are wrapped in the plastic ring. The synchronous ring with improved structure has a long service life.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of automobile accessories, and relates to a synchronizer ring, in particular a synchronizer ring with an improved structure. BACKGROUND

[0002] The synchronizer ring, referred to as a synchronizer ring for short, is an important part of an automobile transmission system.

[0003] The existing synchronizer ring, such as a synchronizer friction ring (application number: 201721296178.0) proposed by the applicant previously, comprises an outer ring in a conical cylinder shape, an inner ring arranged on the inner side of the outer ring, a shoulder arranged on the inner side wall of the outer ring, and the inner ring is abutted on the inner end face of the shoulder, an annular groove is arranged on the inner side wall of the other end of the outer ring, a clamping spring is arranged in the annular groove, and the clamping spring is abutted on the other end face of the inner ring.

[0004] In use, the inner ring friction surface is in contact with the outer surface of the gear ring to be engaged, and under the action of the friction torque, the two rotate synchronously, the rotation speed of the gear to be engaged relative to the synchronizer ring is zero, and the teeth on the synchronizer ring are engaged with the teeth of the gear to be engaged by moving the synchronizer ring, so that gear shifting is completed. However, during the gear shifting operation, the movement of the synchronizer ring will produce a certain radial impact, causing the synchronizer ring to vibrate and collide with the gear to be engaged, increasing the probability of tooth breakage of the synchronizer ring and affecting the normal use of the synchronizer. SUMMARY

[0005] The application aims at the above-mentioned problems existing in the prior art and provides a synchronizer ring with an improved structure and long service life.

[0006] The application can be realized by the following technical scheme: the synchronizer ring with an improved structure comprises an outer ring and an inner ring arranged coaxially, a gear ring is formed on the outer wall of the lower end of the outer 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 tightly pressed on the annular shoulder, characterized in that a rubber ring is vertically arranged between the inner ring and the outer ring, the inner and outer sides of the rubber ring are tightly attached to the inner ring and the outer ring respectively, and the bottom surface of the rubber ring is pressed on the top surface of the annular shoulder; the annular shoulder is coaxially provided with an annular groove opposite to the inner ring, a plurality of protruding columns are integrally formed on the bottom surface of the inner ring, and all the protruding columns are inserted into the annular groove; the bottom surface of the annular shoulder is provided with an injection hole communicating with the annular groove, and the annular groove is filled with plastic by injection molding to form a plastic ring, and all the protruding columns are wrapped in the plastic ring.

[0007] The plastic ring in which the inner ring is injection molded in the annular groove is formed into a whole with the outer ring, so as to ensure the stability of the overall structure of the synchronizer ring.

[0008] The rubber ring is clamped between the inner ring and the outer ring, and the convex column is completely wrapped in the plastic ring, so that the contact position of the inner ring and the outer ring is provided with an elastic layer formed by the rubber ring or the plastic ring, and the radial force transmitted to the inner ring is buffered by the elastic layer, so that the meshing process of the synchronizing ring is smoother, the probability of breaking during meshing of the synchronizing ring is effectively reduced, and the service life of the synchronizing ring is improved.

[0009] In the improved structure of the synchronizing ring, the convex column is substantially inverted T-shaped, the plastic ring is formed on the upper side of the head of the convex column, the upward movement of the inner ring is effectively inhibited, the bonding strength of the inner ring and the outer ring is strengthened, and the structural stability of the synchronizing ring is improved.

[0010] In the improved structure of the synchronizing ring, the inner wall of the annular groove is composed of two groove side surfaces and a groove bottom surface between the two groove side surfaces, the upper hole of the injection hole is located on the groove bottom surface, the two groove side surfaces are tapered surfaces and are symmetrically arranged, and the diameter of the groove side surface gradually increases from top to bottom. The two groove side surfaces are designed to be symmetrically arranged tapered surfaces, which play a guiding role, so that the injected plastic is drawn together in the middle to uniformly fill the annular groove, and the bonding strength and stability of the convex column and the outer ring are strengthened.

[0011] In the improved structure of the synchronizing ring, the injection hole has at least two and is uniformly distributed along the circumference of the outer ring, the plastic ring integrally forms a connecting block with a shape and size matched with the injection hole in the direction of the injection hole, the number of the connecting block and the injection hole is the same and one-to-one corresponding, so as to strengthen the bonding strength of the plastic ring and the outer ring.

[0012] In the improved structure of the synchronizing ring, the injection hole is tapered, and the diameter of the injection hole gradually increases from top to bottom, that is, the connecting block is tapered with a small upper part and a large lower part, and cooperates with the shape of the plastic ring to simultaneously inhibit the upward and downward movement of the plastic ring, thereby further strengthening the bonding strength of the plastic ring and the outer ring, and further improving the structural stability of the synchronizing ring.

[0013] In the improved structure of the synchronizing ring, the head of each convex column is axially penetrated by at least one through hole, and the plastic ring extends into the through hole to form a column, and the number of the column and the through hole is the same and one-to-one corresponding. The above design makes the convex column and the plastic ring form a circumferential cooperation, further improving the structural stability of the synchronizing ring.

[0014] In the improved structure of the synchronizing ring, the inner side wall and the outer side wall of the rubber ring are provided with annular crushing grooves, and the crushing grooves are coaxial with the rubber ring, so that the rubber ring can be elastically deformed faster and better, and better buffering effect can be achieved.

[0015] In the improved structure of the synchronizing ring, the outer ring is fixed with a pressing piece at the upper end, which makes the inner ring have a downward movement tendency, so as to further limit the inner ring in the axial direction, and make the structure of the synchronizing ring more stable.

[0016] In the improved synchronous ring, the pressing member is annular, the pressing member is coaxial with the inner ring, and the bottom surface of the pressing member is tightly pressed on the top surface of the inner ring.

[0017] In the improved synchronous ring, the pressing member is an annular snap spring, and the inner wall of the outer ring is provided with a snap spring groove in annular shape for mounting the annular snap spring. The above design has the advantages of simple structure and convenient assembly.

[0018] As another option, in the improved synchronous ring, the pressing member is a plurality of pressing blocks distributed along the circumference of the outer ring, and each pressing block is tightly pressed on the top surface of the inner ring.

[0019] Compared with the prior art, the improved synchronous ring has the following advantages:

[0020] 1. The rubber ring clamped between the inner ring and the outer ring and the protruding column are completely wrapped in the plastic ring, so that the contact position of the inner ring and the outer ring is provided with an elastic layer formed by the rubber ring or the plastic ring, and the elastic layer is used to buffer the radial force transmitted at the inner ring, so that the synchronous ring engagement process is smoother, the probability of breaking during synchronous ring engagement is effectively reduced, and the service life of the synchronous ring is improved.

[0021] 2. The injection hole is tapered, and the hole diameter of the injection hole gradually increases from top to bottom, that is, the connecting block is tapered from small to large, and cooperates with the shape of the plastic ring to simultaneously inhibit the upward and downward movement of the plastic ring, thereby further enhancing the bonding strength of the plastic ring and the outer ring and further improving the structural stability of the synchronous ring. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the improved synchronous ring.

[0023] Figure 2 is Figure 1 is an enlarged structural schematic view of A in

[0024] Figure 3 is a structural schematic view of the outer ring.

[0025] Figure 4 is a structural schematic view of the inner ring.

[0026] In the drawings, 1 is the outer ring; 1a is the gear ring; 1b is the annular shoulder; 1c is the annular groove; 1c1 is the groove side surface; 1d is the injection hole; 2 is the inner ring; 2a is the separation groove; 2b is the protruding column; 2b1 is the through hole; 3 is the rubber ring; 3a is the crushing groove; 4 is the plastic ring; 4a is the column body; 4c is the connecting block; 5 is the pressing member. DETAILED DESCRIPTION

[0027] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.

[0028] Example 1

[0029] like Figure 1 As shown, the synchronization ring of this improved structure includes an outer ring 1 and an inner ring 2 arranged coaxially.

[0030] in,

[0031] A toothed ring 1a is formed on the lower outer wall of the outer ring 1, and an annular shoulder 1b is formed on the lower inner wall of the outer ring 1. The annular shoulder 1b and the outer ring 1 are coaxially arranged and are an integral structure.

[0032] The inner ring 2 is located within the outer ring 1, and the bottom surface of the inner ring 2 is pressed tightly against the annular shoulder 1b. In the actual product, the inner surface of the inner ring 2 is provided with friction texture, and a dividing groove 2a runs vertically through the inner surface of the inner ring 2, dividing the friction texture into multiple small blocks evenly distributed along the circumference of the inner ring 2.

[0033] like Figure 1 As shown, a rubber ring 3 is vertically positioned between the inner ring 2 and the outer ring 1. The inner and outer sides of the rubber ring 3 are tightly attached to the inner ring 2 and the outer ring 1, respectively, and the bottom surface of the rubber ring 3 presses against the top surface of the annular shoulder 1b. Further, annular crushing grooves 3a are formed on both the inner and outer walls of the rubber ring 3, and these crushing grooves 3a are coaxial with the rubber ring 3, allowing the rubber ring 3 to undergo elastic deformation more quickly and effectively, achieving a better cushioning effect. In actual products, the axial cross-section of the crushing groove 3a is arc-shaped; multiple annular crushing grooves 3a are formed on both the inner and outer walls of the rubber ring 3, and the crushing grooves 3a on the same side are evenly distributed along the axial direction of the rubber ring 3.

[0034] An annular groove 1c is coaxially formed on the annular shoulder 1b, directly opposite the inner ring 2, and the annular groove 1c and the outer ring 1 are coaxially arranged. For example... Figure 1 , Figure 2 and Figure 4 As shown, a ring of protruding posts 2b is integrally formed on the bottom surface of the inner ring 2, and all protruding posts 2b are inserted into the aforementioned annular groove 1c. An injection hole 1d is provided on the bottom surface of the annular shoulder 1b, communicating with the annular groove 1c. The annular groove 1c is filled with plastic by injection molding to form a plastic ring 4, and all protruding posts 2b are encased within the plastic ring 4. The inner ring 2, through the injection-molded plastic ring 4 in the annular groove 1c, forms a single unit with the outer ring 1 to ensure the overall structural stability of the synchronization ring.

[0035] The rubber ring 3 and the protrusion 2b between the inner ring 2 and the outer ring 1 are completely wrapped in the plastic ring 4. The contact points of the inner ring 2 and the outer ring 1 are provided with an elastic layer formed by the rubber ring 3 or the plastic ring 4. The elastic layer is used to buffer the radial force transmitted from the inner ring 2, making the synchronizing ring meshing process smoother, effectively reducing the probability of the synchronizing ring breaking during meshing, and improving the life of the synchronizing ring.

[0036] In the present embodiment,

[0037] The convex column 2b is substantially inverted T-shaped, and the plastic ring 4 forms a barrier on the upper side of the head of the convex column 2b, effectively inhibiting the upward movement of the inner ring 2, strengthening the bonding strength of the inner ring 2 and the outer ring 1, and improving the stability of the structure of the present synchronous ring. Further, at least one through hole 2b1 is axially formed on the head of each convex column 2b, the plastic ring 4 extends into the through hole 2b1 to form a column body 4a, the number of the column body 4a and the through hole 2b1 is the same and one-to-one corresponding, so that the circumferential cooperation between the convex column 2b and the plastic ring 4 is formed, and the stability of the structure of the present synchronous ring is further improved. Preferably, two through holes 2b1 are provided on each convex column 2b, and the two through holes 2b1 on the same convex column 2b are respectively located on both sides of the stem of the convex column 2b.

[0038] As shown in Figure 3 , the annular groove 1c has the following structure: the inner wall of the annular groove 1c is composed of two groove side surfaces 1c1 and a groove bottom surface between the two groove side surfaces 1c1, the upper hole of the injection hole 1d is located on the groove bottom surface, the two groove side surfaces 1c1 are tapered surfaces and are symmetrically arranged, and the diameter of the groove side surface 1c1 gradually increases from top to bottom. The two groove side surfaces 1c1 are designed to be tapered surfaces arranged symmetrically, which plays a guiding role, so that the injected plastic is drawn together in the middle to uniformly fill the annular groove 1c, thereby strengthening the bonding strength and stability of the convex column 2b and the outer ring 1.

[0039] In order to further strengthen the bonding strength of the plastic ring 4 and the outer ring 1, the plastic ring 4 is integrally formed with a connecting block 4c extending in the direction of the injection hole 1d, the connecting block 4c has a shape and size matching the injection hole 1d, the injection hole 1d is at least two and is uniformly distributed along the circumference of the outer ring 1, and the number of the connecting block 4c and the injection hole 1d is the same and one-to-one corresponding. Further, the injection hole 1d is tapered, and the diameter of the injection hole 1d gradually increases from top to bottom, that is, the connecting block 4c is tapered with the upper small and the lower large, and cooperates with the shape of the plastic ring 4 to simultaneously inhibit the upward and downward movement of the plastic ring 4, thereby further strengthening the bonding strength of the plastic ring 4 and the outer ring 1, and further improving the structural stability of the present synchronous ring.

[0040] As shown in Figure 1 , the outer ring 1 is fixed with a pressing piece 5 at the upper end, which makes the inner ring 2 have a downward movement tendency, so as to further limit the inner ring 2 in the axial direction, and make the structure of the synchronous ring more stable. Preferably, the pressing piece 5 is annular, the pressing piece 5 is coaxial with the inner ring 2, and the bottom surface of the pressing piece 5 is tightly pressed on the top surface of the inner ring 2. In the actual product, the pressing piece 5 is a ring-shaped clasp spring, and a clasp spring groove in the shape of a ring is formed on the inner wall of the outer ring 1 for installing the ring-shaped clasp spring. The above design has the advantages of simple structure and convenient assembly.

[0041] Embodiment two

[0042] The structure and principle of the second embodiment are basically the same as those of the first embodiment, and the difference lies in that the pressing piece 5 is a plurality of pressing blocks uniformly distributed along the circumference of the outer ring 1, and each pressing block is tightly pressed on the top surface of the inner ring 2.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art can make various modifications or supplements to the specific embodiments described or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A synchronizer ring with an improved structure, comprising an outer ring (1) and an inner ring (2) coaxially arranged, wherein a toothed ring (1a) is formed on the lower outer wall of the outer ring (1), and an annular shoulder (1b) is formed on the lower inner wall of the outer ring (1), and the bottom surface of the inner ring (2) is pressed tightly against the annular shoulder (1b), characterized in that, A rubber ring (3) is vertically arranged between the inner ring (2) and the outer ring (1). The inner and outer sides of the rubber ring (3) are tightly attached to the inner ring (2) and the outer ring (1), respectively, and the bottom surface of the rubber ring (3) presses against the top surface of the annular shoulder (1b). An annular groove (1c) is coaxially formed on the annular shoulder (1b) and is directly opposite to the inner ring (2). A ring of protruding posts (2b) is integrally formed on the bottom surface of the inner ring (2), and all the protruding posts (2b) are inserted into the annular groove (1c). A ring of protruding posts (2b) is formed on the bottom surface of the annular shoulder (1b). The injection hole (1d) of the annular groove (1c) is connected. The annular groove (1c) is filled with plastic by injection molding to form a plastic ring (4). All the protrusions (2b) are wrapped in the plastic ring (4). The protrusions (2b) are roughly inverted T-shaped. The inner wall of the annular groove (1c) is composed of two groove sides (1c1) and the groove bottom surface between the two groove sides (1c1). The upper opening of the injection hole (1d) is located on the groove bottom surface. The two groove sides (1c1) are both conical surfaces and are symmetrically arranged. The diameter of the groove sides (1c1) gradually increases from top to bottom.

2. The improved synchronization ring according to claim 1, characterized in that, There are at least two injection holes (1d) and they are evenly distributed around the outer ring (1). The plastic ring (4) extends in the direction of the injection hole (1d) and is integrally formed with a connecting block (4c) whose shape and size match the injection hole (1d). The number of connecting blocks (4c) and injection holes (1d) are the same and their positions correspond one-to-one.

3. The improved synchronization ring according to claim 2, characterized in that, The injection hole (1d) is conical, and the diameter of the injection hole (1d) gradually increases from top to bottom.

4. The improved synchronization ring according to claim 1, characterized in that, Each protruding post (2b) has at least one through hole (2b1) axially penetrating its head. The plastic ring (4) extends into the through hole (2b1) to form a post (4a). The number of posts (4a) and through holes (2b1) are the same and their positions correspond one-to-one.

5. The improved synchronization ring according to claim 1, characterized in that, The inner and outer walls of the rubber ring (3) are provided with annular crushing grooves (3a), and the crushing grooves (3a) are coaxial with the rubber ring (3).

6. The improved synchronization ring according to claim 1, characterized in that, The upper end of the outer ring (1) is fixed with a pressure member (5) that makes the inner ring (2) tend to move downward.

7. The improved synchronization ring according to claim 6, characterized in that, The pressure piece (5) is ring-shaped and coaxial with the inner ring (2), and the bottom surface of the pressure piece (5) is pressed tightly against the top surface of the inner ring (2).

8. The improved synchronization ring according to claim 7, characterized in that, The pressure piece (5) is a ring snap ring, and the inner wall of the outer ring (1) is provided with a ring-shaped snap ring groove for installing the ring snap ring.

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