CN215980700U - End tooth structure of triple gear - Google Patents
End tooth structure of triple gear Download PDFInfo
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- CN215980700U CN215980700U CN202121761955.0U CN202121761955U CN215980700U CN 215980700 U CN215980700 U CN 215980700U CN 202121761955 U CN202121761955 U CN 202121761955U CN 215980700 U CN215980700 U CN 215980700U
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Abstract
The utility model relates to an end tooth structure of a triple gear. An end tooth construction for a triple gear comprising: the meshing sleeve combination teeth are arranged on the end face of the triple gear and are used for being combined with the sliding meshing sleeves on the corresponding drive axles so as to enable the inter-axle differential to be in a differential locking state; the transition chamfer is arranged at the tooth root of the engaging sleeve engaging tooth; two avoidance grooves are arranged on the bottom wall of a tooth groove formed between two adjacent meshing sleeve combined teeth, and the two avoidance grooves are respectively positioned at the tooth roots of the two meshing sleeve combined teeth; at least one part of the transition chamfer is positioned in the avoiding groove and is used for avoiding the adaptive teeth on the sliding meshing sleeve. According to the scheme, the problems that the meshing sleeve combined tooth on the triple gear is high in height and large in axial size in the prior art can be solved, the axial size of the triple gear is favorably reduced, the strength of the meshing sleeve combined tooth is guaranteed, and the lubricating effect of the meshing sleeve combined tooth is favorably improved.
Description
Technical Field
The utility model relates to an end tooth structure of a triple gear.
Background
The differential is an important structure of a drive axle, is a mechanism which can enable left and right (or front and rear) driving wheels to rotate at different rotating speeds, and has the function of enabling the left and right wheels to roll at different rotating speeds when an automobile turns or runs on an uneven road surface, so as to ensure that the driving wheels on two sides do pure rolling motion. For trucks, a strong driving force is required to meet load requirements and different road conditions, a dual drive axle is generally used, a four-wheel drive structure is adopted, the power of an engine is transmitted to a through type middle axle and then transmitted to an inter-axle differential (also called an inter-axle differential) on the middle axle to an inter-axle differential and a rear-axle inter-wheel differential, and the inter-axle differential and the rear-axle inter-wheel differential distribute the power to corresponding wheels on the left side and the right side of a vehicle.
The conventional inter-axle differential is disclosed in chinese patent publication No. CN202264605U, and includes an input shaft for transmission connection with an engine, and the input shaft is provided with a sliding engagement sleeve, a triple gear, a cross shaft, and a side gear in order along an axial direction. The end face of one end of the triple gear is provided with engaging sleeve combining teeth, the end face of the other end of the triple gear is provided with bevel teeth, and the peripheral surface of the triple gear is provided with front differential half shaft transmission teeth. The meshing sleeve combination teeth are used for being combined with the sliding meshing sleeve to achieve differential locking, the bevel teeth are used for being meshed with the planetary gears on the cross shafts, and the front differential half shaft transmission teeth are used for outputting power to the inter-wheel differential of the front wheels. In the process of the drive axle working, the sliding meshing sleeve can slide along the input shaft under the action of the shifting fork and is combined with and separated from the meshing sleeve on the end face of the triple gear.
In order to meet the requirement of torque transmission, the meshing sleeve combined teeth on the triple gear need to meet a certain tooth height requirement; however, in order to avoid stress concentration, a transition chamfer needs to be arranged at the tooth root of the engaging sleeve combining teeth, the transition chamfer is arranged between the bottom wall of a tooth groove formed between two adjacent engaging sleeve combining teeth and the tooth flank of the engaging sleeve combining teeth, and the transition chamfer can interfere with adaptive teeth on a sliding engaging sleeve, so that the height of the engaging teeth of the triple gear in the prior art is higher, and the reduction of the axial size of the triple gear and the size reduction of the differential in the corresponding direction between shafts are not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an end tooth structure of a triple gear, which solves the problems of high combined tooth height and large axial size of a meshing sleeve on the triple gear in the prior art.
The utility model adopts the following technical scheme:
an end tooth construction for a triple gear comprising:
the meshing sleeve combination teeth are arranged on the end face of the triple gear and are used for being combined with the sliding meshing sleeves on the corresponding drive axles so as to enable the inter-axle differential to be in a differential locking state;
the transition chamfer is arranged at the tooth root of the engaging sleeve engaging tooth;
two avoidance grooves are arranged on the bottom wall of a tooth groove formed between two adjacent meshing sleeve combined teeth, and the two avoidance grooves are respectively positioned at the tooth roots of the two meshing sleeve combined teeth;
at least one part of the transition chamfer is positioned in the avoiding groove and is used for avoiding the adaptive teeth on the sliding meshing sleeve.
Has the advantages that: by adopting the technical scheme, the avoiding groove at the tooth root of the meshing sleeve combined tooth can avoid the adaptive tooth on the sliding meshing sleeve, so that under the condition of avoiding the stress concentration at the tooth root of the meshing sleeve combined tooth, the tooth height of the meshing sleeve combined tooth is reduced, the axial size of the triple gear is reduced, and the strength of the meshing sleeve combined tooth is ensured. Meanwhile, the avoiding groove can form a lubricating oil storage space, and the lubricating oil storage space is directly adjacent to the tooth flank of the meshing sleeve combined tooth, so that the lubricating effect of the meshing sleeve combined tooth is improved.
As a preferred technical scheme: one end of the avoidance groove close to the axis of the triple gear is of a closed structure, and the other end of the avoidance groove is provided with an opening; alternatively, the first and second electrodes may be,
one end, away from the axis of the triple gear, of the avoiding groove is of a closed structure, and the other end of the avoiding groove is provided with an opening.
Has the advantages that: by adopting the technical scheme, the structural strength of the engaging teeth of the engaging sleeve can be improved under the condition of adapting to different engaging parts of the adapting teeth on the sliding engaging sleeve.
As a preferred technical scheme: the outline shape of the closed end of the avoidance groove is arc-shaped.
Has the advantages that: by adopting the technical scheme, the triple gear is conveniently formed by adopting a forging mode, and the strength is favorably improved.
As a preferred technical scheme: and openings are formed in one end, close to the axis of the triple gear, of the avoidance groove and one end, far away from the axis of the triple gear, of the avoidance groove to form a through groove.
Has the advantages that: by adopting the technical scheme, the sliding meshing sleeve can adapt to the condition that the meshing part of the adaptive teeth on the sliding meshing sleeve is longer.
As a preferred technical scheme: the opening of the avoiding groove is of a flaring structure.
Has the advantages that: adopt above-mentioned technical scheme to be convenient for adopt forged mode shaping triple gear.
As a preferred technical scheme: and the opening of the avoidance groove is provided with a fillet to form an arc-shaped flaring.
As a preferred technical scheme: the transition chamfer is completely positioned in the avoiding groove, and the tooth flank of the meshing sleeve combined tooth forms a part of the avoiding groove.
Has the advantages that: by adopting the technical scheme, the tooth height of the engaging sleeve combining teeth can be controlled to a greater extent.
As a preferred technical scheme: the avoidance groove extends in the radial direction of the triple gear.
Has the advantages that: by adopting the technical scheme, the structure of the avoiding groove is regular and convenient to manufacture.
As a preferred technical scheme: the end face of the triple gear is provided with an annular step, the annular step is positioned on the outer side of the meshing sleeve combining teeth in the radial direction of the triple gear, and the step surface of the annular step is lower than the groove bottom wall of the avoiding groove.
As a preferred technical scheme: the triple gear is a forged piece, and the avoidance groove is formed by forging.
Has the advantages that: by adopting the technical scheme, the strength of the triple gear is improved, and the cost is saved.
Drawings
FIG. 1 is a schematic view of an end tooth structure of a triple gear in accordance with an embodiment 1 of the present invention in use;
FIG. 2 is a front cross-sectional view of the triple gear of FIG. 1;
FIG. 3 is a right side view of FIG. 2;
fig. 4 is a left side view of fig. 2.
The names of the components corresponding to the corresponding reference numerals in the drawings are: 10. an input shaft; 20. sliding the meshing sleeve; 30. a triple gear; 31. engaging sleeve engaging teeth; 32. conical teeth; 33. front differential half shaft transmission teeth; 34. sinking a groove; 35. a sloping transition surface; 36. a base portion; 37. an outer edge portion; 38. an avoidance groove; 39. an annular step; 40. a differential case; 41. a cross shaft; 42. a planetary gear; 43. a half shaft gear; 50. an inter-wheel differential.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Example 1 of the end tooth structure of the triple gear in the present invention:
as shown in fig. 1, the triple gear 30 is adapted to be installed in an inter-axle drive axle including an input shaft 10, the input shaft 10 being adapted to be drivingly connected to an engine, and a sliding sleeve 20, the triple gear 30, a cross shaft 41, and a side gear 43 are provided thereon in this order in an axial direction. The end face of one end of the triple gear 30 is provided with engaging sleeve combining teeth 31, the end face of the other end is provided with bevel teeth 32, and the outer peripheral surface is provided with front differential half shaft transmission teeth 33. The engaging sleeve engaging teeth 31 are used for engaging with the sliding engaging sleeve 20 to realize differential locking, the bevel teeth 32 are used for engaging with the planetary gears 42 on the cross shafts 41, and the front differential half-shaft transmission teeth 33 are straight gears for outputting power to the inter-wheel differential 50 of the front wheels. A differential case 40 is also provided on the inter-axle transaxle axially outward of the planetary gears 42.
The triple gear 30 of the present invention is a forged part, and is different from the prior art in that, as shown in fig. 2 and 4, two relief grooves 38 are provided on the bottom wall of the tooth space formed between two adjacent engaging sleeve engaging teeth 31, and the two relief grooves 38 are respectively located at the tooth root of the two engaging sleeve engaging teeth 31 and extend in the radial direction of the triple gear 30. The transition chamfer at the tooth root of the sleeve engaging tooth 31 is located entirely within the avoiding groove 38 on one side in the width direction of the avoiding groove 38, and the flank of the sleeve engaging tooth 31 forms a part of the avoiding groove 38. The contour of the transition chamfer is not shown in the figures because the transition chamfer at the root of the sleeve engaging tooth 31 is a smooth transition with the flank of the sleeve engaging tooth 31.
An opening is formed in one end, facing the radial outer side of the triple gear 30, of the avoiding groove 38, and a rounding angle is formed at the opening, so that an arc-shaped flaring is formed, and the processing is convenient. The end of the avoiding groove 38 close to the axis of the triple gear 30 is of a closed structure, and the outline of the end is circular arc, so that a circular arc closed end is formed. Meanwhile, the top notch edge of the avoiding groove 38 is provided with a fillet, so that the forging and forming are facilitated.
In addition, an annular step 39 is provided on an end surface of the triple gear 30, the annular step 39 is located outside the engaging sleeve engaging teeth 31 in the radial direction of the triple gear 30, and a step surface of the annular step 39 is lower than a groove bottom wall of the avoiding groove 38.
As shown in fig. 2 and 3, a sunk groove 34 is formed in an end face of one end of the triple gear 30, which is provided with the bevel gear 32, and the sunk groove 34 is used for avoiding a differential case 40 of the inter-axle differential and allowing a part of the differential case 40 to enter, so that the space occupation of the differential case 40 is reduced, and the space occupation of the whole inter-axle drive axle is further reduced. The bevel gear 32 is arranged on the bottom wall of the sink groove 34 and is completely positioned in the sink groove 34, and the tooth crest of the small end of the bevel gear is lower than the opening edge of the sink groove 34. The tank side walls of the sink tank 34 are sloped side walls such that the sink tank 34 forms a flared structure.
The part of the triple gear 30 provided with the meshing sleeve combination teeth 31 and the bevel teeth 32 is used as a base part 36, the part provided with the front differential half shaft transmission teeth 33 is used as an outer edge part 37, and the inclined side wall of the sinking groove 34 and the inclined transition surface 35 enable the outer edge part 37 of the triple gear 30 to be in an offset state relative to the base part 36 along the axial direction of the triple gear 30, so that the overall weight of the triple gear 30 is favorably reduced and the space occupation is favorably reduced under the condition of meeting the transmission requirement.
The triple gear 30 is used as a forging piece, and the avoiding groove 38, the meshing sleeve combination tooth 31, the bevel gear 32 and the front differential half shaft transmission tooth 33 are integrally formed in the forging process of the triple gear 30, so that the structural strength is high, and the cost is low.
When the triple gear 30 is mounted on the inter-axle drive axle, the avoiding groove 38 can avoid the adaptive teeth on the sliding meshing sleeve, so that under the condition of avoiding stress concentration at the tooth root of the meshing sleeve combining teeth 31, the tooth height of the meshing sleeve combining teeth 31 is reduced, the axial size of the triple gear 30 is favorably reduced, and the strength of the meshing sleeve combining teeth 31 is ensured.
Example 2 of the end tooth structure of the triple gear in the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, one end of the avoiding groove 38 close to the axis of the triple gear 30 is a closed structure, and the other end is provided with an opening, which can adapt to the meshing position of the adaptive teeth on the sliding meshing sleeve, as shown in fig. 1; in the present embodiment, according to the meshing position of the adaptive teeth on the sliding sleeve, one end of the avoiding groove 38 away from the axis of the triple gear 30 is a closed structure, and the other end is provided with an opening.
Of course, in other embodiments, depending on the engagement position of the mating teeth on the sliding sleeve, the escape groove 38 may be provided as a through groove, with openings at both the end near the axis of the triple gear 30 and the end away from the axis of the triple gear 30. In addition, both ends of the avoiding groove 38 may be closed structures according to the meshing position of the adaptive teeth on the sliding meshing sleeve.
Example 3 of the end tooth structure of the triple gear in the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the transition chamfer at the tooth root of the sleeve-engaging tooth 31 is completely located in the avoiding groove 38, whereas in the present embodiment, the transition chamfer at the tooth root of the sleeve-engaging tooth 31 is located only partially in the avoiding groove 38 and partially higher than the notch of the avoiding groove 38.
Example 4 of the end tooth structure of the triple gear in the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the transition chamfer at the tooth root of the sleeve-engaging tooth 31 is located on one side in the width direction of the avoiding groove 38, whereas in the present embodiment, the profile of the avoiding groove 38 in the longitudinal section is circular arc-shaped, and the transition chamfer forms half the profile of the avoiding groove 38.
Example 5 of the end tooth structure of the triple gear in the present invention:
the difference between the present embodiment and embodiment 1 is that in embodiment 1, a rounded corner is provided at the opening of the avoiding groove 38 to form an arc-shaped flared opening, while in the present embodiment, the groove wall at the opening of the avoiding groove 38 is linearly and obliquely arranged to form a funnel-shaped structure. Of course, in other embodiments, the opening of the bypass groove 38 may be a straight opening.
Example 6 of the end tooth structure of the triple gear in the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the escape groove 38 extends in the radial direction of the triple gear 30, whereas in the present embodiment, the escape groove 38 is arranged obliquely with respect to the radial direction of the triple gear 30.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. An end tooth construction for a triple gear comprising:
meshing sleeve combination teeth (31) are arranged on the end face of the triple gear (30) and are used for being combined with sliding meshing sleeves (20) on corresponding drive axles so as to enable the inter-axle differential to be in a differential locking state;
a transition chamfer arranged at the tooth root of the engaging sleeve engaging tooth (31);
it is characterized in that the preparation method is characterized in that,
two avoidance grooves (38) are formed in the bottom wall of the tooth groove formed between every two adjacent meshing sleeve combination teeth (31), and the two avoidance grooves (38) are respectively located at the tooth roots of the two meshing sleeve combination teeth (31);
at least a portion of the transition chamfer is located within the relief groove (38) for relieving the mating teeth on the sliding sleeve.
2. End tooth construction according to claim 1, wherein the end of the avoiding groove (38) close to the axis of the triple gear (30) is closed and the other end is provided with an opening; alternatively, the first and second electrodes may be,
one end, away from the axis of the triple gear (30), of the avoiding groove (38) is of a closed structure, and the other end of the avoiding groove is provided with an opening.
3. An end tooth construction according to claim 2, wherein the closed end of the avoidance groove (38) is profiled in the shape of a circular arc.
4. End tooth construction according to claim 1, wherein the avoidance slot (38) is provided with an opening at both its end close to the axis of the triple gear (30) and its end remote from the axis of the triple gear (30) forming a through slot.
5. An end tooth construction according to claim 2 or 3 or 4, characterized in that the opening of said avoiding groove (38) is a flared construction.
6. An end tooth construction according to claim 5, wherein the opening of said avoiding groove (38) is rounded to form an arcuate flare.
7. An end tooth construction according to claim 1 or 2 or 3 or 4, characterized in that said transition chamfer is located entirely within said avoiding groove (38), the flank of the engaging sleeve engaging tooth (31) forming part of the avoiding groove (38).
8. An end tooth construction according to claim 1 or 2 or 3 or 4, characterized in that the avoidance groove (38) extends in the radial direction of the triple gear.
9. An end tooth construction according to claim 1 or 2 or 3 or 4, characterized in that an annular step (39) is provided on the end face of the triple gear, the annular step (39) being located outside the sleeve engaging tooth (31) in the radial direction of the triple gear, the step face of the annular step (39) being lower than the groove bottom wall of the avoiding groove (38).
10. End tooth construction according to claim 1 or 2 or 3 or 4, characterized in that the triple gear (30) is a forging, the avoiding groove (38) being formed by forging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121761955.0U CN215980700U (en) | 2021-07-30 | 2021-07-30 | End tooth structure of triple gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121761955.0U CN215980700U (en) | 2021-07-30 | 2021-07-30 | End tooth structure of triple gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215980700U true CN215980700U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121761955.0U Active CN215980700U (en) | 2021-07-30 | 2021-07-30 | End tooth structure of triple gear |
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|---|---|
| CN (1) | CN215980700U (en) |
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2021
- 2021-07-30 CN CN202121761955.0U patent/CN215980700U/en active Active
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