Synchronizer structure of gearbox

Abstract

The utility model provides a synchronizer structure of a gearbox, and belongs to the technical field of gearboxes. The problem that in the prior art, a single spring structure provides insufficient buffering is solved. The synchronous mechanism comprises a first synchronous ring, a second synchronous ring, a joint gear sleeve, a first spring ring, a second spring ring, a synchronous gear and a synchronous sliding block, the lower ends, extending out of the two sides of the joint gear sleeve, of the surfaces of outer teeth form limiting cambered surfaces, a sliding block groove is formed in the periphery of the joint gear sleeve, the synchronous sliding block is arranged in the sliding block groove, and limiting convex bodies are formed on the two sides of the synchronous sliding block. The first spring ring and the second spring ring are of an annular structure with an opening, are attached to the lower ends of the limiting convex bodies on the two sides of the synchronous sliding block correspondingly, and are attached to the end faces of the two sides of the joint gear sleeve correspondingly. And the first synchronous ring and the second synchronous ring are respectively inserted into the first limiting groove and the second limiting groove. The buffering device has the advantages of being stable in structure and high in buffering capacity.

Description

Technical Field

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

[0002] The working principle of a synchronizer is to use the friction between the synchronizer ring and the driven gear to make the driven gear rotate at the same speed as the output shaft, and then the sliding engagement sleeve engages with the side gear ring of the driven gear to complete the gear shifting operation.

[0003] Chinese patent publication number CN206190768U discloses a synchronizer and gearbox, including 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 cone, a spring, and a push block. The first inner conical surface can mate with the first outer conical surface, and the second inner conical surface can mate with the second outer conical surface. The cone has a third outer conical surface, and the inner conical ring also has a third inner conical surface and a pawl. The third inner conical surface can mate with the third outer conical surface. The outer conical ring also has a boss, and the gear hub has a clearance portion. The clearance portion includes a through groove and / or through hole opened along the axial direction of the gear hub, and the boss and pawl extend into the clearance portion.

[0004] The patent provides a synchronizer and gearbox that uses a single-spring structure. During gear shifting, when the synchronizer is subjected to abnormal external interference, the single-spring structure is difficult to provide sufficient buffering and compensation. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a synchronizer structure for a gearbox.

[0006] The objective of this utility model can be achieved through the following technical solution: A synchronizer structure for a gearbox includes a first synchronizer ring, a second synchronizer ring, a connecting sleeve, a first spring ring, a second spring ring, a synchronizer gear, and a synchronizer slider. The connecting sleeve has a ring structure and an external tooth surface on its exterior. The external tooth surface extends outward from both sides of the connecting sleeve, and the lower end of the external tooth surface extending outward from both sides of the connecting sleeve forms a limiting arc surface. A plurality of slider grooves are formed on the outer circumference of the connecting sleeve. The number of synchronizer sliders is the same as the number of slider grooves, and the synchronizer sliders are disposed in the slider grooves. Limiting protrusions are formed on both sides of the synchronizer sliders. The first spring ring and the second spring ring are annular structures with openings, and the first spring ring and the second spring ring are respectively fitted to the lower ends of the limiting protrusions on both sides of the synchronizer sliders. The first spring ring and the second spring ring are respectively fitted to the end faces on both sides of the connecting sleeve. A first limiting groove and a second limiting groove are respectively formed between the first spring ring and the second spring ring and the limiting arc surface on both sides of the connecting sleeve. The first synchronizer ring and the second synchronizer ring are respectively inserted into the first limiting groove and the second limiting groove.

[0007] In the synchronizer structure of the aforementioned gearbox, the synchronizer gear is a ring structure and has an internal tooth surface formed inside. The synchronizer gear is sleeved outside the engagement sleeve and the internal tooth surface meshes with the external tooth surface.

[0008] In the synchronizer structure of the gearbox described above, the first synchronizer ring and the second synchronizer ring are respectively provided with a first groove and a second groove, and the two sides of the synchronizer slider are respectively disposed in the first groove and the second groove.

[0009] In the synchronizer structure of the aforementioned gearbox, a shift fork groove is formed on the outer periphery of the synchronizer gear.

[0010] In the synchronizer structure of the gearbox described above, the ends of the first spring ring and the second spring ring are respectively provided with a first fixed protrusion and a second fixed protrusion, and the first fixed protrusion and the second fixed protrusion are respectively connected to both sides of the synchronizer slider.

[0011] In the synchronizer structure of the aforementioned gearbox, the inner tooth surface is provided with a meshing groove, and the outer surface of the synchronizing slider is formed with a meshing protrusion, which meshes with the meshing groove.

[0012] Compared with the prior art, the synchronizer structure of the gearbox provided by this utility model has the following beneficial effects: 1. The first spring ring and the second spring ring are open annular structures, respectively fitting with the lower ends of the limiting protrusions on both sides of the synchronizer slider, and are directly connected to both sides of the synchronizer slider through the first fixed protrusion and the second fixed protrusion respectively provided at the ends. This symmetrical fit design can evenly transmit the spring force to both sides of each synchronizer slider, avoiding the problem of uneven force on the slider caused by a single-sided spring or complex spring structure in the prior art; 2. The first spring ring and the second spring ring respectively fit with the end faces of the engagement sleeve, and form a first limiting groove and a second limiting groove with the limiting arc surface of the engagement sleeve. The first synchronizer ring and the second synchronizer ring are inserted into the corresponding grooves. This structure restricts the axial movement of the first synchronizer ring and the second synchronizer ring through the cooperation of the double spring ring and the limiting arc surface, avoiding the problem of unstable synchronization gap caused by loose positioning of the synchronizer ring in the prior art. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0015] Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention.

[0016] In the figure: 1. First synchronizing ring; 11. First groove; 2. Second synchronizing ring; 21. Second groove; 3. Engaging gear sleeve; 31. External tooth surface; 32. Limiting arc surface; 33. Slider groove; 34. First limiting groove; 35. Second limiting groove; 4. First spring ring; 41. First fixed protrusion; 5. Second spring ring; 51. Second fixed protrusion; 6. Synchronizing gear; 61. Internal tooth surface; 62. Shift fork groove; 63. Meshing groove; 7. Synchronizing slider; 71. Limiting protrusion; 72. Meshing protrusion. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figures 1 to 3 As shown, this embodiment includes a first synchronizing ring 1, a second synchronizing ring 2, a gear sleeve 3, a first spring ring 4, a second spring ring 5, a synchronizing gear 6, and a synchronizing slider 7, which constitute a complete gearbox synchronizer structure.

[0019] like Figures 1 to 3 As shown, the engaging tooth sleeve 3 has a ring structure with an external tooth surface 31 on its exterior. The external tooth surface 31 extends to both sides of the engaging tooth sleeve 3, and the lower ends of the external tooth surface 31 extending to both sides of the engaging tooth sleeve 3 form a limiting arc surface 32. A plurality of slider grooves 33 are evenly opened on the outer circumference of the engaging tooth sleeve 3. The number of synchronous sliders 7 is the same as the number of slider grooves 33 and they are arranged one-to-one in the slider grooves 33. Limiting protrusions 71 are integrally formed on both sides of the synchronous sliders 7. The first spring ring 4 and the second spring ring 5 are both annular structures with openings and The first spring ring 4 and the second spring ring 5 are respectively fitted to the lower ends of the limiting protrusions 71 on both sides of the synchronous slider 7. At the same time, the first spring ring 4 and the second spring ring 5 are also tightly fitted to the end faces on both sides of the engaging tooth sleeve 3. The first spring ring 4 and the limiting arc surface 32 on one side of the engaging tooth sleeve 3 form a first limiting groove 34, and the second spring ring 5 and the limiting arc surface 32 on the other side of the engaging tooth sleeve 3 form a second limiting groove 35. The first synchronous ring 1 and the second synchronous ring 2 are respectively inserted into the first limiting groove 34 and the second limiting groove 35 to achieve precise positioning.

[0020] like Figures 1 to 3 As shown, the synchronous gear 6 has a ring structure with an internal tooth surface 61. The synchronous gear 6 is sleeved on the outside of the engagement sleeve 3, and the internal tooth surface 61 meshes with the external tooth surface 31 of the engagement sleeve 3 to ensure the stability of power transmission. The synchronous gear 6 also has a shift fork groove 62 on its outer periphery, which facilitates the shifting operation by cooperating with the external shift fork structure.

[0021] To elaborate further, such as Figure 2 and Figure 3As shown, the first synchronous ring 1 and the second synchronous ring 2 are respectively provided with a first groove 11 and a second groove 21. The two sides of the synchronous slider 7 are respectively provided in the first groove 11 and the second groove 21 to form a multi-directional limiting structure, which improves the stability of the synchronization process. The inner tooth surface 61 is provided with a meshing groove 63, and the outer surface of the synchronous slider 7 is correspondingly provided with a meshing protrusion 72. The meshing protrusion 72 meshes with the meshing groove 63 to further optimize the power transmission path.

[0022] To elaborate further, such as Figure 2 As shown, the ends of the first spring ring 4 and the second spring ring 5 are integrally formed with a first fixed protrusion 41 and a second fixed protrusion 51, respectively. The first fixed protrusion 41 and the second fixed protrusion 51 are fixedly connected to both sides of the synchronous slider 7. This connection method ensures that the spring force can be evenly transmitted to each synchronous slider 7, ensuring the consistency of synchronous action.

[0023] To elaborate further, such as Figure 2 As shown, the first spring ring 4 and the second spring ring 5 are symmetrically matched, and the spring force is evenly transmitted to both sides of each synchronous slider 7 through this structure.

[0024] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0025] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A synchronizer structure for a gearbox, comprising a first synchronizer ring (1), a second synchronizer ring (2), a gear sleeve (3), a first spring ring (4), a second spring ring (5), a synchronizer gear (6), and a synchronizer slider (7), characterized in that: The engaging tooth sleeve (3) has a ring structure and an external tooth surface (31) is provided on the outside of the engaging tooth sleeve (3). The external tooth surface (31) extends out of both sides of the engaging tooth sleeve (3). The lower end of the external tooth surface (31) extending out of both sides of the engaging tooth sleeve (3) forms a limiting arc surface (32). A plurality of slider grooves (33) are opened on the outer periphery of the engaging tooth sleeve (3). The number of synchronous sliders (7) is the same as the number of slider grooves (33) and the synchronous sliders (7) are set in the slider grooves (33). Limiting protrusions (71) are formed on both sides of the synchronous sliders (7). The first spring ring (4) and the second spring ring (5) The first spring ring (4) and the second spring ring (5) are respectively fitted to the lower ends of the limiting protrusions (71) on both sides of the synchronous slider (7). The first spring ring (4) and the second spring ring (5) are respectively fitted to the end faces on both sides of the engagement tooth sleeve (3). The first spring ring (4) and the second spring ring (5) form a first limiting groove (34) and a second limiting groove (35) between the first spring ring (4) and the second spring ring (5) and the limiting arc surfaces (32) on both sides of the engagement tooth sleeve (3). The first synchronous ring (1) and the second synchronous ring (2) are respectively inserted into the first limiting groove (34) and the second limiting groove (35).

2. The synchronizer structure of a gearbox according to claim 1, characterized in that: The synchronous gear (6) has a ring structure and an internal tooth surface (61) is formed inside the synchronous gear (6). The synchronous gear (6) is sleeved on the outside of the engagement sleeve (3) and the internal tooth surface (61) meshes with the external tooth surface (31).

3. The synchronizer structure of a gearbox according to claim 1, characterized in that: The first synchronization ring (1) and the second synchronization ring (2) are respectively provided with a first groove (11) and a second groove (21), and the two sides of the synchronization slider (7) are respectively disposed in the first groove (11) and the second groove (21).

4. The synchronizer structure of a gearbox according to claim 1, characterized in that: The outer periphery of the synchronizing gear (6) has a shift fork groove (62).

5. The synchronizer structure of a gearbox according to claim 1, characterized in that: The first spring ring (4) and the second spring ring (5) are respectively provided with a first fixed protrusion (41) and a second fixed protrusion (51) at their ends, and the first fixed protrusion (41) and the second fixed protrusion (51) are respectively connected to both sides of the synchronous slider (7).

6. The synchronizer structure of a gearbox according to claim 2, characterized in that: The inner tooth surface (61) is provided with a meshing groove (63), and the outer surface of the synchronous slider (7) is provided with a meshing protrusion (72), which meshes with the meshing groove (63).

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