Integrated planetary mechanism auxiliary box synchronizer

Abstract

The present invention discloses an integrated planetary mechanism sub-box synchronizer, comprising a low-speed coupling tooth fixedly mounted on the inner wall of the housing of the sub-transmission, a high-speed coupling tooth fixedly mounted on the output shaft of the sub-transmission, and a planetary mechanism gear ring arranged between the low-speed coupling tooth and the high-speed coupling tooth, the planetary mechanism gear ring integrates the function of a synchronizer sliding gear sleeve, a synchronizer ring is inserted at the outer side of the gear ring corresponding to the position of the low-speed coupling tooth and the high-speed coupling tooth, and a pre-synchronization component of an elastic structure is arranged between the synchronizer ring and the gear ring. It is suitable for transmissions.

Description

Technical Field

[0001] The invention relates to the field of transmissions, and in particular to an integrated planetary mechanism auxiliary box synchronizer. Background Art

[0002] At present, a planetary gear type subtransmission refers to a subtransmission that uses a planetary gear mechanism to achieve speed change, which generally includes a housing, a sun gear with an input shaft installed in the housing, planetary gears installed around the sun gear, a ring gear sleeved outside the planetary gears, a synchronizer installed between the housing and the output shaft, and a ring gear bracket, one end of the ring gear bracket is connected to the ring gear, and the other end of the ring gear bracket is connected to the gear seat of the synchronizer.

[0003] The synchronizer includes a low-speed coupling tooth fixedly mounted on the inner wall of the housing, a high-speed coupling tooth fixedly mounted on the output shaft, a tooth seat arranged between the low-speed coupling tooth and the high-speed coupling tooth, and a synchronizer ring, a push block and a sliding gear sleeve installed on the tooth seat. The low-speed coupling tooth is arranged at the end of the sliding gear sleeve facing the input shaft, and the high-speed coupling tooth is arranged at the end of the sliding gear sleeve facing the output shaft. The synchronizer and auxiliary box of this structure have the following problems:

[0004] 1. When the synchronizer of this structure is applied to the auxiliary transmission, the synchronization of the ring gear with the high-speed combined gear and the low-speed combined gear requires the transmission transition of the ring gear bracket, and the ring gear bracket has a complex structure, high precision requirements, and difficult processing. Therefore, the synchronizer of this structure will cause the planetary gear type auxiliary transmission to have a complex structure and high manufacturing cost;

[0005] 2. The axial installation space of the entire planetary mechanism auxiliary box is relatively large, which will lead to a longer gearbox length;

[0006] 3. This type of synchronizer generally uses a single-cone design. The friction circle diameter of the synchronizer ring cannot exceed the outer diameter of the sleeve. The synchronizer's synchronization capacity is relatively small. However, if the synchronization capacity needs to be increased, only a double-cone structure can be used, which will inevitably increase a lot of costs. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a synchronizer for a planetary gear type auxiliary transmission with high shifting efficiency, good reliability, large synchronizer capacity and simplified planetary gear type auxiliary transmission structure.

[0008] In order to achieve the above objectives, the present invention provides an integrated planetary mechanism sub-box synchronizer, comprising a low-gear combining tooth, a high-gear combining tooth and a planetary mechanism ring gear arranged between the low-gear combining tooth and the high-gear combining tooth, the planetary mechanism ring gear integrating the function of a synchronizer sliding gear sleeve, a synchronizer ring is inserted on the outer side of the planetary mechanism ring gear corresponding to the position of the low-gear combining tooth and the high-gear combining tooth, and a pre-synchronization component with an elastic structure is provided between the synchronizer ring and the ring gear.

[0009] In the above scheme, an external spline is provided on one side of the outer ring of the planetary mechanism gear ring, and an axial through groove, a high-speed first locking bevel, a low-speed first locking bevel and an annular groove are provided on the external spline. The through groove cooperates with the first boss and the second boss of the inner ring of the synchronous ring, and a fork groove is provided on the other side of the outer ring of the planetary mechanism gear ring.

[0010] In the above scheme, the inner ring of the planetary mechanism gear ring is provided with an internal spline, which cooperates with the planetary wheel of the planetary mechanism. The internal spline is provided with meshing teeth near the high-grade side end face. After the high gear is engaged, the meshing teeth are connected with the meshing teeth of the high-grade cone hub.

[0011] In the above scheme, the pre-synchronization component is an elastic steel wire ring, which is installed in the ring groove of the planetary mechanism gear ring. The outer ring of the pre-synchronization component contacts the grooves set on the first boss and the second boss of the inner ring of the synchronization ring. When the gear is engaged, the synchronization component moves axially along the groove.

[0012] In the above scheme, the integrated planetary mechanism sub-box synchronizer is characterized in that the first boss side is provided with a second locking bevel matched with the high-speed first locking bevel, and the second boss side is provided with a second locking bevel matched with the low-speed first locking bevel.

[0013] In the above scheme, the high-grade cone hub adopts a split structure, which is composed of an inner ring meshing gear ring and an outer ring stamped cone disk. The inner ring meshing gear ring is provided with a first boss and a second boss for clamping the stamped cone disk. The first boss is provided with an axial groove, and the second boss is provided with a radial groove. The inner ring of the stamped cone disk is provided with a mounting boss and a claw. During assembly, the mounting boss is installed in the groove, and the claw is installed in the radial groove.

[0014] In the above scheme, the number of the synchronizer ring is one, and the outer ring of the synchronizer ring is provided with two conical surfaces, and the two conical surfaces are respectively a high-speed combined tooth conical surface and a low-speed combined tooth conical surface to form a friction pair.

[0015] In the above solution, all pre-synchronization components of the elastic structure are in a compressed state.

[0016] The beneficial effects brought by the technical solution provided by the present invention are:

[0017] 1. By integrating the planetary gear ring and the synchronizer sleeve, and reducing the gear ring bracket and synchronizer gear seat, the available installation space in the auxiliary transmission is larger, which provides conditions for reducing the volume of the auxiliary transmission;

[0018] 2. When the auxiliary box shifts gears, the shift fork drives the planetary gear ring to move axially, the planetary gear ring drives the pre-synchronization component, and the pre-synchronization component drives the synchronizer ring to reach the locking position. After the synchronization is completed, the planetary gear ring meshes with the high-speed or low-speed combination teeth to complete the gear shift. The synchronizer structure is simpler, the cost is lower, the gear shifting efficiency is higher, and the reliability is better;

[0019] 3. The pre-synchronization component is an elastic wire ring, which is installed in the ring groove of the planetary mechanism gear ring. The outer ring of the pre-synchronization component contacts the grooves set on the first boss and the second boss of the inner ring of the synchronization ring. When the gear is engaged, the synchronization component moves axially along the groove, which can further reduce the cost;

[0020] 4. During assembly, the synchronizer ring is set on the outside of the planetary mechanism gear ring. Only one synchronizer ring is needed. Two conical surfaces are set on the outer ring of the synchronizer ring. The two conical surfaces are the high-speed combined tooth cone surface and the low-speed combined tooth cone surface to form a friction pair. In this way, the diameter of the friction cone is much larger than the outer diameter of the planetary mechanism gear ring, which can effectively increase the synchronization capacity and improve the synchronization performance.

[0021] 5. Compared with the prior art, the present invention fully demonstrates its superiority in that the synchronization action is more direct, the gear shifting efficiency is higher, the reliability is better, the synchronization capacity is larger, and the structure of the planetary gear sub-transmission can be simplified and its manufacturing cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the transmission principle structure of the embodiment;

[0023] Figure 2 It is a schematic diagram of the transmission principle structure of a traditional auxiliary transmission;

[0024] Figure 3 It is a structural schematic diagram of a synchronizer in an embodiment;

[0025] Figure 4 for Figure 3 Schematic diagram of the explosion structure;

[0026] Figure 5 for Figure 3 Structural diagram of the ring gear of the planetary mechanism;

[0027] Figure 6 for Figure 3 The structural diagram of the synchronization ring;

[0028] Figure 7 for Figure 3 Schematic diagram of the middle and high-end combined teeth;

[0029] Figure 8 for Figure 7 Schematic diagram of the explosion structure;

[0030] In the figure: housing 1, sun gear 2, planetary gear 3, synchronizer 4, high-speed coupling tooth 4a, meshing gear ring 4a1, stamped cone disk 4a2, meshing tooth 4a3, first boss 4a4, second boss 4a5, groove 4a6, radial groove 4a7, mounting boss 4a8, claw 4a9, synchronizer ring 4b, synchronizer ring first boss 4b1, synchronizer ring second boss 4b2, high-speed second locking inclined surface 4b3, low-speed second locking inclined surface 4b4, groove 4b5, low-speed coupling tooth 4c, sliding gear sleeve 4d, planetary mechanism gear ring 5, through groove 5c1, high-speed first locking inclined surface 5c2, low-speed first locking inclined surface 5c3, ring groove 5c4, fork groove 5c5, meshing tooth 5c6. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present invention.

[0032] An integrated planetary mechanism auxiliary case synchronizer comprises a low-speed coupling tooth 4c, a high-speed coupling tooth 4a and a planetary mechanism ring gear 5 arranged between the low-speed coupling tooth 4c and the high-speed coupling tooth 4a, the planetary mechanism ring gear 5 integrates the function of a synchronizer sliding gear sleeve, a synchronizer ring 4b is inserted at the outer side of the planetary mechanism ring gear 5 corresponding to the position of the low-speed coupling tooth 4c and the high-speed coupling tooth 4a, and a pre-synchronization component 4d of an elastic structure is arranged between the synchronizer ring 4b and the ring gear 5. It is suitable for transmissions.

[0033] An external spline is provided on one side of the outer ring of the planetary mechanism gear ring 5, and an axial through groove 5c1, a high-speed first locking bevel 5c2, a low-speed first locking bevel 5c3, and an annular groove 5c4 are provided on the external spline. The through groove 5c1 cooperates with the first boss 4b1 and the second boss 4b2 of the inner ring of the synchronizer ring 4b, and a fork groove 5c5 is provided on the other side of the outer ring of the planetary mechanism gear ring 5.

[0034] The inner ring of the planetary mechanism gear ring 5 is provided with an internal spline, which cooperates with the planetary gear of the planetary mechanism. The internal spline is provided with meshing teeth 5c6 near the high-grade side end face. After the high gear is engaged, the meshing teeth 5c6 are connected with the meshing teeth 4a3 of the high-grade cone hub 4a.

[0035] The above-mentioned pre-synchronization component 4d is an elastic steel wire ring, which is installed in the ring groove 5c4 of the planetary mechanism gear ring 5. The outer ring of the pre-synchronization component 4d contacts the groove 4b5 set on the first boss 4b1 and the second boss 4b2 of the inner ring of the synchronization ring 4b. When the gear is engaged, the synchronization component 4d moves axially along the groove 4b5.

[0036] The first boss 4b1 has a high-speed second locking slope 4b3 matched with the high-speed first locking slope 5c2 on its side, and the second boss 4b2 has a low-speed second locking slope 4b4 matched with the low-speed first locking slope 5c3 on its side.

[0037] The high-grade cone hub 4a adopts a split structure, which is composed of an inner ring meshing gear ring 4a1 and an outer ring stamped cone disk 4a2. The inner ring meshing gear ring 4a1 is provided with a first boss 4a4 and a second boss 4a5 for clamping the stamped cone disk 4a2. The first boss 4a4 is provided with an axial groove 4a6, and the second boss 4a5 is provided with a radial groove 4a7. The inner ring of the stamped cone disk 4a2 is provided with a mounting boss 4a8 and a claw 4a9. During assembly, the mounting boss 4a8 is installed in the groove 4a6, and the claw 4a9 is installed in the radial groove 4a7.

[0038] The number of the above-mentioned synchronizer ring 4b is one, and the outer ring of the synchronizer ring 4b is provided with two conical surfaces, and the two conical surfaces respectively form a friction pair with the conical surface of the high-speed coupling tooth 4a and the conical surface of the low-speed coupling tooth 4c.

[0039] The pre-synchronization components 4d of the elastic structure are all in a compressed state.

[0040] Working principle: When in use, the planetary mechanism ring gear and the synchronizer sleeve are integrated into an integrated design, and the ring gear bracket and synchronizer gear seat are reduced. The available installation space in this sub-transmission is larger, which provides conditions for reducing the volume of the sub-transmission. When the sub-box shifts gears, the shift fork drives the planetary mechanism ring gear to move axially, and the planetary mechanism ring gear drives the pre-synchronization component, and the pre-synchronization component drives the synchronizer ring to reach the locking position. After the synchronization is completed, the planetary mechanism ring gear engages with the high-speed or low-speed combining teeth to complete the gear shift. The synchronizer structure is simpler, the cost is lower, the shifting efficiency is higher, and the reliability is better. During assembly, the synchronizer ring is arranged on the outside of the planetary mechanism ring gear. Only one synchronizer ring is required. Two conical surfaces are arranged on the outer ring of the synchronizer ring. The two conical surfaces are the high-speed combining tooth conical surface and the low-speed combining tooth conical surface to form a friction pair. In this way, the diameter of the friction cone is much larger than the outer diameter of the planetary mechanism ring gear, which can effectively increase the synchronization capacity and improve the synchronization performance.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated planetary mechanism auxiliary case synchronizer, comprising a low-gear coupling tooth (4c), a high-gear coupling tooth (4a), and a planetary mechanism ring gear (5) arranged between the low-gear coupling tooth (4c) and the high-gear coupling tooth (4a), the planetary mechanism ring gear (5) integrating the function of a synchronizer sliding gear sleeve, a synchronizer ring (4b) being inserted at a position corresponding to the low-gear coupling tooth (4c) and the high-gear coupling tooth (4a) on the outer side of the planetary mechanism ring gear (5), and a pre-synchronization component (4d) of an elastic structure being arranged between the synchronizer ring gear (4b) and the planetary mechanism ring gear (5); An external spline is provided on one side of the outer ring of the planetary mechanism gear ring (5), and an axial through groove (5c1), a high-speed first locking bevel (5c2), a low-speed first locking bevel (5c3), and an annular groove (5c4) are provided on the external spline; the through groove (5c1) cooperates with a first boss (4b1) and a second boss (4b2) on the inner ring of the synchronization ring (4b); and a shift fork groove (5c5) is provided on the other side of the outer ring of the planetary mechanism gear ring (5); The inner ring of the planetary mechanism gear ring (5) is provided with an internal spline, the internal spline cooperates with the planetary gear of the planetary mechanism, the internal spline is provided with a first meshing tooth (5c6) near the high-speed side end face, and after the high-speed gear is engaged, the first meshing tooth (5c6) is connected with the meshing tooth (4a3) of the high-speed coupling tooth (4a); The pre-synchronization component (4d) is an elastic steel wire ring, which is installed in the ring groove (5c4) of the planetary mechanism gear ring (5). The outer ring of the pre-synchronization component (4d) contacts the grooves (4b5) provided on the first boss (4b1) and the second boss (4b2) of the inner ring of the synchronization ring (4b). When the gear is engaged, the pre-synchronization component (4d) moves axially along the grooves (4b5); A high-speed second locking bevel (4b3) matching the high-speed first locking bevel (5c2) is provided on the side of the first boss (4b1), and a low-speed second locking bevel (4b4) matching the low-speed first locking bevel (5c3) is provided on the side of the second boss (4b2).

2. The integrated planetary mechanism auxiliary box synchronizer according to claim 1, characterized in that: The high-grade coupling tooth (4a) adopts a split structure, and is composed of an inner ring meshing gear ring (4a1) and an outer ring stamping cone disk (4a2); the inner ring meshing gear ring (4a1) is provided with a third boss (4a4) and a fourth boss (4a5) for clamping the stamping cone disk (4a2); the third boss (4a4) is provided with an axial groove (4a6); the fourth boss (4a5) is provided with a radial groove (4a7); the inner ring of the stamping cone disk (4a2) is provided with a mounting boss (4a8) and a clamping claw (4a9); during assembly, the mounting boss (4a8) is inserted into the axial groove (4a6), and the clamping claw (4a9) is inserted into the radial groove (4a7).

3. The integrated planetary mechanism auxiliary box synchronizer as claimed in claim 2, characterized in that: The number of the synchronizer ring (4b) is one, and the outer ring of the synchronizer ring (4b) is provided with two conical surfaces, and the two conical surfaces respectively form a friction pair with the conical surface of the high-speed coupling tooth (4a) and the conical surface of the low-speed coupling tooth (4c).

4. The integrated planetary mechanism auxiliary box synchronizer as claimed in claim 3, characterized in that: The pre-synchronization components (4d) of the elastic structure are all in a compressed state.

Images