Wheel train positioning structure, transmission and vehicle

Abstract

The utility model provides a gear train positioning structure, a transmission and a vehicle, and relates to the technical field of vehicle parts, the gear train positioning structure comprises a planet carrier output shaft, a rotating supporting piece, a sun gear and a sun gear output shaft, a planet gear is arranged on the planet carrier output shaft, and a guide sleeve is arranged on the end face of the planet carrier output shaft; the rotary supporting piece is fixedly connected to the inner side wall of the guide sleeve; the sun gear is meshed with the planetary gear; one end of the sun gear output shaft is fixedly connected with the sun gear, and the other end of the sun gear output shaft is rotationally connected with the rotary supporting piece. The sun gear and the planet carrier output shaft are supported and positioned through the rotating supporting piece, the rotating precision of the sun gear is improved, and the situation that due to the fact that the planet gear irregularly rotates around the sun gear, the planet carrier output shaft connected with the sun gear shakes seriously, and then shell cracking in a transmission, oil leakage of an oil seal and NVH of a whole vehicle are caused is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle parts, and in particular to a wheel train positioning structure, a transmission and a vehicle. Background Art

[0002] The planetary gear train structure is a commonly used structure for automobile transmissions, which has the characteristics of small installation space, compact structure, large transmission range and strong bearing capacity.

[0003] At present, in the planetary gear train structure in the related technology, the planetary gears are directly placed on the sun gear. Due to the existence of tooth side clearance, when the sun gear rotates at high speed, the planetary gears rotate irregularly around the sun gear, resulting in large shaking of the planetary carrier output shaft connected to the sun gear. An output flange is provided at one end of the planetary carrier output shaft, which in turn causes large shaking of the transmission shaft connected to the output flange, ultimately leading to cracking of the transmission housing, oil seal leakage and NVH (Noise, Vibration and Harshness) problems of the entire vehicle. Utility Model Content

[0004] The utility model aims to solve the technical problem that the planetary gear rotates irregularly around the sun gear, causing the housing in the transmission to crack, the oil seal to leak and the NVH of the whole vehicle.

[0005] To this end, the first aspect of the utility model provides a gear train positioning structure;

[0006] A second aspect of the utility model provides a transmission;

[0007] A third aspect of the utility model provides a vehicle.

[0008] According to a first aspect of the utility model, a gear train positioning structure is proposed, comprising:

[0009] A planetary carrier output shaft, on which a planetary gear is arranged, and on the end surface of which a guide sleeve is arranged;

[0010] A rotating support member is fixedly connected to the inner wall of the guide sleeve;

[0011] A sun gear meshes with the planetary gears;

[0012] A sun gear output shaft, one end of which is fixedly connected to the sun gear, and the other end of which is rotatably connected to the rotating support.

[0013] The gear train positioning structure provided by the utility model adds a rotating support member at the front end of the sun gear output shaft and in the guide sleeve of the planetary carrier output shaft, so as to achieve the radial limiting effect on the sun gear output shaft, eliminate the influence of the tooth side clearance, and make the circumferential direction of the output of the planetary carrier output shaft more stable.

[0014] By supporting and positioning the sun gear and the planetary carrier output shaft through rotating supports, the rotation accuracy of the sun gear is improved, and the planetary gears are prevented from making irregular rotation around the sun gear, which would cause large shaking of the planetary carrier output shaft connected to the sun gear, and further cause cracking of the transmission housing, oil seal leakage and NVH of the entire vehicle.

[0015] In addition, the technical solution provided by the utility model may also have the following additional technical features:

[0016] In any of the above technical solutions, further, a low gear combining gear ring and a gear seat are provided on the planetary carrier output shaft, and a combining sleeve is slidably connected to the gear seat. Under the action of external force, the combining sleeve meshes with the low gear combining gear ring or separates from the low gear combining gear ring.

[0017] In this technical solution, by arranging the coupling sleeve on the gear seat, the coupling sleeve slides to the left side under the driving action of the shift fork and meshes with the low-speed coupling gear ring, thereby switching to the low-speed gear of the transmission.

[0018] In any of the above technical solutions, further, a high-gear combining ring gear is provided on the output shaft of the planetary carrier, and the high-gear combining ring gear is located on the side of the gear seat away from the low-gear combining ring gear. Under the action of external force, the combining sleeve is meshed with the high-gear combining ring gear or the combining sleeve is separated from the high-gear combining ring gear.

[0019] In this technical solution, by arranging the coupling sleeve on the gear seat, the coupling sleeve slides to the right side under the driving action of the shift fork and meshes with the high-gear coupling gear ring, thereby switching to the high-speed gear of the transmission.

[0020] In any of the above technical solutions, further, a shell and a fixed plate are provided on the planetary carrier output shaft, the shell and the fixed plate are detachably connected, and the low-gear combined gear ring, the gear seat and the high-gear combined gear ring are all located between the shell and the fixed plate.

[0021] In this technical solution, by arranging the low-gear combined gear ring, the gear seat and the high-gear combined gear ring between the shell and the fixed plate, the fixed connection between the shell and the fixed plate forms a box structure, which provides an operating environment for the low-gear combined gear ring, the gear seat and the high-gear combined gear ring.

[0022] In any of the above technical solutions, further, the gear train positioning structure also includes:

[0023] The ring gear is sleeved on the output shaft of the planetary carrier and meshes with the planetary gears.

[0024] In this technical solution, when the planetary gear is driven by an external force, it drives the ring gear to rotate.

[0025] In any of the above technical solutions, further, a fixed inner ring is rotatably connected to the output shaft of the planet carrier, one side of the fixed inner ring is rotatably connected to the gear ring, and the other side is rotatably connected to the gear seat.

[0026] In this technical solution, when the gear ring rotates, it drives the fixed inner ring to rotate, and the fixed inner ring drives the gear seat to rotate.

[0027] In any of the above technical solutions, further, an output component is provided at one end of the planetary carrier output shaft away from the sun gear, and the output component includes an output flange.

[0028] In this technical solution, power is input to the sun gear, driving the planetary gears, the planetary carrier output shaft and the ring gear to rotate together, and finally the power is input to the output component through the planetary carrier output shaft, and then the output component transmits the power to the drive shaft on the vehicle.

[0029] In any of the above technical solutions, further, the rotating support member is sleeved on the output shaft of the sun gear, and the rotating support member includes a support bearing.

[0030] In this technical solution, the outer ring of the support bearing is fixedly connected to the inner wall of the guide sleeve; the inner ring of the support bearing is sleeved on the sun gear output shaft and fixedly connected to the sun gear output shaft; the outer ring and inner ring of the support bearing rotate relative to each other through rollers.

[0031] According to a second aspect of the present invention, a transmission is provided. The transmission includes the gear train positioning structure according to the first aspect.

[0032] The transmission provided by the utility model has all the structures of the gear train positioning structure of the first aspect, and therefore has all the beneficial effects of the gear train positioning structure of the first aspect.

[0033] According to a third aspect of the present invention, a vehicle is provided. The vehicle comprises the wheel train positioning structure as in the first aspect or the transmission as in the second aspect.

[0034] The vehicle provided by the utility model has all the structures of the wheel train positioning structure of the first aspect, and therefore has all the beneficial effects of the wheel train positioning structure of the first aspect.

[0035] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0037] Figure 1 A schematic structural diagram of a gear train positioning structure in a low gear state provided by an embodiment of the present application is shown;

[0038] Figure 2 A schematic structural diagram of a gear train positioning structure in a high gear state provided by an embodiment of the present application is shown.

[0039] Figure 1 and Figure 2 10. Planetary carrier output shaft; 1001. Ring gear; 1002. Guide sleeve; 20. Planetary gear; 30. Rotating support; 40. Sun gear; 50. Housing; 60. Low gear combined ring gear; 70. Gear seat; 7001. Combination sleeve; 80. High gear combined ring gear; 90. Fixed plate; 100. Fixed inner ring; 110. Output component; 120. Oil seal; 130. Cylindrical pin; 140. Sun gear output shaft. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0041] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0042] In the description of the present application, it should be understood that the terms "upper", "inner", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] Combine the following Figure 1 and Figure 2 , describing the wheel train positioning structure, transmission and vehicle of the embodiments of the present application.

[0045] According to the first aspect of the present embodiment, a gear train positioning structure is proposed, which includes a planetary carrier output shaft 10, a rotating support member 30, a sun gear 40, and a sun gear output shaft 140. Among them, the planetary carrier output shaft 10 is provided with a planetary gear 20, and a guide sleeve 1002 is provided on the end surface of one side of the planetary carrier output shaft 10; the rotating support member 30 is fixedly connected to the inner side wall of the guide sleeve 1002; the sun gear 40 is meshed with the planetary gear 20; one end of the sun gear output shaft 140 is fixedly connected to the sun gear 40, and the other end is rotatably connected to the rotating support member 30.

[0046] It should be noted that a rotating support member 30 is added at the front end of the sun gear output shaft 140 and in the guide sleeve 1002 of the planetary carrier output shaft 10 to achieve a radial limiting effect on the sun gear output shaft 140, eliminate the influence of the tooth side clearance, and make the circumferential direction of the output of the planetary carrier output shaft 10 more stable.

[0047] By supporting and positioning the sun gear 40 and the planetary carrier output shaft 10 through the rotating support 30, the rotation accuracy of the sun gear 40 is improved, and the planetary gear 20 is prevented from making irregular rotation around the sun gear 40, which causes large shaking of the planetary carrier output shaft 10 connected to the sun gear 40, thereby causing cracks in the housing 50 in the transmission, oil leakage of the oil seal 120 and NVH of the entire vehicle.

[0048] In some embodiments, the rotating support member 30 is sleeved on the sun gear output shaft 140, and the rotating support member 30 includes a supporting bearing. Specifically, the outer ring of the supporting bearing is fixedly connected to the inner side wall of the guide sleeve 1002; the inner ring of the supporting bearing is sleeved on the sun gear output shaft 140 and fixedly connected to the sun gear output shaft 140; the outer ring and the inner ring of the supporting bearing rotate relative to each other through rollers.

[0049] In some embodiments, a low gear coupling ring gear 60 and a gear seat 70 are also provided on the planetary carrier output shaft 10, and a coupling sleeve 7001 is slidably connected to the gear seat 70. By external force driving, the coupling sleeve 7001 is engaged with the low gear coupling ring gear 60 or the coupling sleeve 7001 is separated from the low gear coupling ring gear 60.

[0050] For specific examples, see Figure 1 The coupling sleeve 7001 is sleeved on the gear seat 70. The coupling sleeve 7001 slides to the left under the driving action of the shift fork and meshes with the low-speed coupling gear ring 60, thereby switching to the low-speed gear of the transmission.

[0051] In some embodiments, a high-gear coupling ring gear 80 is also provided on the planetary carrier output shaft 10. The high-gear coupling ring gear 80 is located on the side of the gear seat 70 away from the low-gear coupling ring gear 60. By external force driving, the coupling sleeve 7001 is engaged with the high-gear coupling ring gear 80 or the coupling sleeve 7001 is separated from the high-gear coupling ring gear 80.

[0052] For specific examples, see Figure 2 The coupling sleeve 7001 is sleeved on the gear seat 70. Driven by the shift fork, the coupling sleeve 7001 slides to the right and meshes with the high-gear coupling gear ring 80, thereby switching to the high-speed gear of the transmission.

[0053] In some embodiments, a shell 50 and a fixed plate 90 are also provided on the planetary carrier output shaft 10, and the shell 50 and the fixed plate 90 are detachably connected. Specifically, the shell 50 and the fixed plate 90 are fixedly connected by four cylindrical pins 130; the low-gear combined gear ring 60, the gear seat 70 and the high-gear combined gear ring 80 are all located between the shell 50 and the fixed plate 90, and the fixed connection between the shell 50 and the fixed plate 90 forms a box structure, which provides an operating environment for the low-gear combined gear ring 60, the gear seat 70 and the high-gear combined gear ring 80.

[0054] As a further description of this embodiment, an oil seal 120 is disposed on the housing 50 to prevent leakage of oil in the housing 50 .

[0055] In some embodiments, a ring gear 1001 is sleeved on the planetary carrier output shaft 10, and the ring gear 1001 is meshed with the planetary gear 20. When the planetary gear 20 is driven by an external force, the ring gear 1001 is driven to rotate.

[0056] In some embodiments, a fixed inner ring 100 is rotatably connected to the planetary carrier output shaft 10 , one side of the fixed inner ring 100 is rotatably connected to the ring gear 1001 , and the other side of the fixed inner ring 100 is rotatably connected to the gear seat 70 .

[0057] It should be noted that when the gear ring 1001 rotates, it drives the fixed inner ring 100 to rotate, and the fixed inner ring 100 drives the gear seat 70 to rotate.

[0058] In some embodiments, an output component 110 is provided at one end of the planetary carrier output shaft 10 away from the sun gear 40, and the output component 110 includes an output flange for connecting to a transmission shaft on a vehicle. Of course, it should be understood that a transmission structure other than the output flange can be used if actual needs are met, which is not limited in this embodiment.

[0059] The low gear and high gear of the gear train positioning structure are described in detail below:

[0060] In low gear, the coupling sleeve 7001 is driven by the shift fork to shift gears to the left. At this time, the coupling sleeve 7001, the gear seat 70 and the low gear coupling ring gear 60 are fixed as a whole through splines. The right side of the fixed inner ring 100 is connected to the gear seat 70 through splines, and the left side is connected to the ring gear 1001 through splines.

[0061] At this time, the ring gear 1001 is stationary, and the planetary gear 20 is installed on the planetary carrier output shaft 10. After the power is input to the sun gear 40, the planetary gear 20 and the planetary carrier output shaft 10 are driven to rotate around the ring gear 1001, which plays a role of reducing speed and increasing torque. Finally, the power is input to the output component 110 through the planetary carrier output shaft 10, and then the output component 110 transmits the power to the transmission shaft on the vehicle.

[0062] When in high gear, the coupling sleeve 7001 is driven by the shift fork to shift gears to the right. At this time, the coupling sleeve 7001, the gear seat 70 and the high gear coupling ring gear 80 are fixed as a whole through splines. The right side of the fixed inner ring 100 is connected to the gear seat 70 through splines, and the left side is connected to the ring gear 1001 through splines. The high gear coupling ring gear 80 is also connected to the planetary carrier output shaft 10 through splines.

[0063] After the power is input to the sun gear 40, the planetary gears 20, the planetary carrier output shaft 10 and the ring gear 1001 are driven to rotate together, and finally the power is input to the output component 110 through the planetary carrier output shaft 10, and then the output component 110 transmits the power to the transmission shaft on the vehicle.

[0064] According to a second aspect of the present embodiment, a transmission is provided. The transmission includes the gear train positioning structure according to the first aspect.

[0065] The transmission provided in this embodiment has all the structures of the gear train positioning structure of the first aspect, and therefore has all the beneficial effects of the gear train positioning structure of the first aspect.

[0066] According to a third aspect of the present embodiment, a vehicle is provided. The vehicle includes the gear train positioning structure according to the first aspect or the transmission according to the second aspect.

[0067] The vehicle provided by the utility model has all the structures of the wheel train positioning structure of the first aspect, and therefore has all the beneficial effects of the wheel train positioning structure of the first aspect.

[0068] In the description of this specification, the description with reference to the terms "one embodiment" or "specific embodiment" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A gear train positioning structure, characterized in that: include: A planetary carrier output shaft (10), wherein a planetary gear (20) is provided on the planetary carrier output shaft (10), and a guide sleeve (1002) is provided on the end surface of the planetary carrier output shaft (10); A rotating support member (30) fixedly connected to the inner wall of the guide sleeve (1002); A sun gear (40), the sun gear (40) being meshed with the planetary gears (20); A sun gear output shaft (140), one end of the sun gear output shaft (140) being fixedly connected to the sun gear (40), and the other end of the sun gear output shaft (140) being rotatably connected to the rotating support member (30).

2. The gear train positioning structure according to claim 1, characterized in that: A low-gear coupling ring gear (60) and a gear seat (70) are also provided on the planetary carrier output shaft (10); a coupling sleeve (7001) is slidably connected to the gear seat (70); under the action of an external force, the coupling sleeve (7001) meshes with the low-gear coupling ring gear (60) or the coupling sleeve (7001) and the low-gear coupling ring gear (60) are separated.

3. The gear train positioning structure according to claim 2, characterized in that: A high-gear coupling ring gear (80) is also provided on the planetary carrier output shaft (10). The high-gear coupling ring gear (80) is located on a side of the gear seat (70) away from the low-gear coupling ring gear (60). Under the action of an external force, the coupling sleeve (7001) meshes with the high-gear coupling ring gear (80) or the coupling sleeve (7001) and the high-gear coupling ring gear (80) are separated.

4. The gear train positioning structure according to claim 3, characterized in that: A housing (50) and a fixing plate (90) are also provided on the planetary carrier output shaft (10); the housing (50) and the fixing plate (90) are detachably connected; the low-gear combined gear ring (60), the gear seat (70) and the high-gear combined gear ring (80) are all located between the housing (50) and the fixing plate (90).

5. The gear train positioning structure according to claim 3, characterized in that: The gear train positioning structure also includes: The ring gear (1001) is sleeved on the planetary carrier output shaft (10) and meshes with the planetary gear (20).

6. The gear train positioning structure according to claim 5, characterized in that: A fixed inner ring (100) is rotatably connected to the planet carrier output shaft (10); one side of the fixed inner ring (100) is rotatably connected to the gear ring (1001), and the other side of the fixed inner ring (100) is rotatably connected to the gear seat (70).

7. The gear train positioning structure according to claim 1, characterized in that: An output component (110) is provided at one end of the planet carrier output shaft (10) away from the sun gear (40), and the output component (110) comprises an output flange.

8. The gear train positioning structure according to claim 1, characterized in that: The rotating support member (30) is sleeved on the sun gear output shaft (140), and the rotating support member (30) comprises a supporting bearing.

9. A transmission, characterized in that: The transmission comprises a gear train positioning structure as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle comprises the gear train positioning structure according to any one of claims 1 to 8 or the transmission according to claim 9.

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