Oil guide pipe between second shaft of transmission and main shaft of auxiliary box and transmission

Abstract

The utility model discloses an oil guide pipe between a transmission second shaft and an auxiliary box main shaft and a transmission. One end of the oil guide pipe is of a horn mouth structure, and the other end of the oil guide pipe is of a cylindrical structure. When the oil guide pipe is used, one end of the horn mouth structure is connected with a main shaft, one end of the cylindrical structure is connected with a second shaft, the inclination of the oil guide pipe during installation can be effectively reduced through the end of the cylindrical structure, the oil guide pipe can be assembled at will without being vertically placed during assembly, and meanwhile the long oil guide pipe is prevented from being crushed. And the assembly efficiency of the production line is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission oil guide pipe development, and relates to an oil guide pipe between a transmission secondary shaft and a secondary box main shaft and a transmission. Background Art

[0002] As the application of forced lubrication system in transmission is paid more and more attention, the lubrication route of forced lubrication system is getting longer and longer, and the number of lubrication points is increasing, which makes more key parts of transmission get lubrication, greatly improving the service life of transmission assembly products. For box-type transmission, the synchronizer, gear spacer and second shaft shaft head bearing in the second shaft assembly are the lubrication points at the end of the forced lubrication system. These parts mainly transmit lubricating oil through the oil guide pipe at the rear end of the second shaft and the front end of the auxiliary box main shaft. The two ends of the common oil guide pipe are bell-mouthed, and the axial spacing between the front end of the auxiliary box main shaft and the rear end of the second shaft of different types of transmissions is different, which makes the length of the oil guide pipe change accordingly. However, due to the existence of installation clearance, this long bell-mouthed oil guide pipe has a large tilt during assembly, which will cause the oil guide pipe to be crushed by the auxiliary box main shaft during assembly and directly affect the assembly efficiency of the production line. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides an oil guide pipe between the second shaft of a transmission and the auxiliary box main shaft and a transmission, thereby solving the technical problem in the prior art that the oil guide pipe is easily crushed by the auxiliary box main shaft, affecting the assembly efficiency.

[0004] The utility model is realized by the following technical solutions:

[0005] An oil guide pipe between a transmission shaft and an auxiliary box main shaft, wherein one end of the oil guide pipe is a bell-mouth structure and the other end is a cylindrical structure; when the oil guide pipe is used, one end of the bell-mouth structure is connected to the main shaft and one end of the cylindrical structure is connected to the second shaft.

[0006] Preferably, the oil guide pipe comprises a first pipe section, a second pipe section, a third pipe section and a fourth pipe section which are integrally arranged, the first pipe section is a cylindrical structure, and the fourth pipe section is a bell-mouth structure.

[0007] Preferably, the length of the first pipe section is greater than the depth of the oil guide pipe mounting hole on the second shaft.

[0008] Preferably, the length of the first tube segment is 12-15 mm.

[0009] Preferably, the first pipe section is clearance-matched with the two shafts.

[0010] Preferably, the clearance between the first pipe section and the two shafts is less than 0.2 mm.

[0011] Preferably, the fourth pipe section is clearance-matched with the main shaft.

[0012] Preferably, the second pipe section is an arc structure.

[0013] Preferably, after the oil guide pipe is connected to the two shafts, the maximum angle between the axis of the oil guide pipe and the axis of the two shafts is 2.8°.

[0014] A transmission comprises the above-mentioned oil guide pipe between the second shaft of the transmission and the auxiliary box main shaft.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model discloses an oil guide pipe between a second shaft of a transmission and a main shaft of an auxiliary box, wherein one end of the oil guide pipe is a bell-mouth structure and the other end is a cylindrical structure; when the oil guide pipe is used, one end of the bell-mouth structure is connected to the main shaft, and one end of the cylindrical structure is connected to the second shaft; the end of the cylindrical structure can effectively reduce the inclination of the oil guide pipe during installation; during assembly, the oil pipe can be assembled arbitrarily without ensuring that it is placed vertically; at the same time, it can also avoid the long oil guide pipe from being crushed, thereby greatly improving the assembly efficiency of the production line.

[0017] Furthermore, the length of the first pipe section is greater than the depth of the oil guide pipe mounting hole on the second shaft, which effectively constrains the inclination angle of the oil guide pipe.

[0018] Furthermore, the length of the first pipe section is 12 to 15 mm, which effectively ensures the stability of the oil guide pipe during installation.

[0019] Furthermore, the first pipe section is clearance-matched with the second shaft, making the installation of the oil guide pipe more convenient.

[0020] Furthermore, the clearance between the first pipe section and the second shaft is less than 0.2 mm, which effectively constrains the angle between the oil guide pipe and the axis of the second shaft.

[0021] Furthermore, the fourth pipe section is clearance-matched with the main shaft, making the matching installation of the oil guide pipe and the main shaft more convenient.

[0022] Furthermore, after the oil guide pipe is connected to the second shaft, the maximum angle between the axis of the oil guide pipe and the axis of the second shaft is 2.8°, which effectively restricts the inclination of the oil guide pipe and improves the assembly efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of an oil guide pipe with bell-shaped ends in the prior art;

[0025] Figure 2 It is a schematic diagram of the interference assembly of the bell-mouth oil guide pipe at both ends in the prior art;

[0026] Figure 3 This is a schematic diagram of the structure of the oil guide pipe in the utility model;

[0027] Figure 4 It is a schematic diagram of the assembly of the oil guide pipe in the utility model.

[0028] Among them: 1. second shaft, 2. oil guide pipe in the prior art, 3. main shaft, 4. oil pipe, 41. first pipe section, 42. second pipe section, 43. third pipe section, 44. fourth pipe section. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 the present utility model can be understood according to specific circumstances.

[0035] The utility model is further described in detail below with reference to the accompanying drawings:

[0036] like Figure 1 The figure shows the schematic diagram of the bell-mouth oil guide pipe structure at both ends. Figure 2 This is a schematic diagram of the interference of the trumpet-mouth oil pipe assembly at both ends of a certain twelve-speed transmission with a forced lubrication system. Its characteristic is that the axial spacing between the rear end of the second shaft 1 and the front end of the auxiliary box main shaft 3 is large, which makes the oil pipe 2 designed to be longer in the prior art. The total length of the oil pipe of the twelve-speed transmission is 52mm. The long oil pipe will tilt due to the installation gap. The maximum inclination angle of the oil pipe 2 of the twelve-speed transmission is 14.2° on one side, which will directly cause the auxiliary box main shaft 3 to crush the oil pipe 2 during the assembly of the auxiliary box assembly. This requires that during the assembly of the transmission box production line, the oil pipe 2 must be placed vertically in the oil hole at the rear end of the second shaft 1, but this will affect the beat of the production line and reduce assembly efficiency.

[0037] The utility model improves the oil guide pipe 2 in the prior art, and the structure is as follows Figure 3 As shown, one end of the oil guide pipe 4 is a bell-mouth structure, and the other end is a cylindrical structure; when the oil guide pipe is used, one end of the bell-mouth structure is connected to the main shaft 3, and one end of the cylindrical structure is connected to the second shaft 1. The oil guide pipe 4 includes a first pipe section 41, a second pipe section 42, a third pipe section 43 and a fourth pipe section 44 that are integrally arranged, the first pipe section 41 is a cylindrical structure, and the fourth pipe section 44 is a bell-mouth structure.

[0038] In a preferred embodiment, the length of the first pipe section 41 is greater than the depth of the oil pipe installation hole on the second shaft 1. The length of the first pipe section 41 is 12-15 mm, which effectively constrains the inclination angle of the oil pipe and ensures the stability of the oil pipe during installation.

[0039] In another more preferred embodiment, the first pipe section 41 and the second shaft 1 have a clearance fit, and the clearance between the first pipe section 41 and the second shaft 1 is less than 0.2 mm, which effectively constrains the angle between the oil guide pipe and the axis of the second shaft.

[0040] In addition, the fourth pipe section 44 is clearance-matched with the main shaft 3, making the matching and installation of the oil guide pipe and the main shaft more convenient. The second pipe section 42 is an arc structure.

[0041] After the present invention is optimized, when the oil guide pipe 4 is connected to the second shaft 1, the maximum angle between the axis of the oil guide pipe 4 and the axis of the second shaft 1 is 2.8°.

[0042] That is, the utility model is an improvement on the problem of the oil guide pipe between the transmission shaft 1 and the auxiliary box main shaft 3 being crushed. Figure 3 It is a schematic diagram of the optimized single-sided bell-mouth oil guide pipe structure. The total length of the oil guide pipe 4 remains unchanged and the bell-mouth structure is retained at the rear end. The bell-mouth structure at the front end is optimized to a cylindrical section with a diameter of φ14.8mm and a length of 12mm. During the assembly process, this section is placed in the oil hole at the rear end of the second shaft 1. Its length is greater than the depth of the oil hole. At the same time, a tolerance of φ14.8m±0.1mm is given to strictly control the assembly clearance. The matching clearance is less than 0.2mm. The above two points can greatly constrain the inclination angle of the oil guide pipe 4. The maximum inclination angle of the optimized oil guide pipe 4 is 2.8° on one side, that is, after the oil guide pipe 4 is connected to the second shaft 1, the maximum angle between the axis of the oil guide pipe 4 and the axis of the second shaft 1 is 2.8°. This directly avoids the oil guide pipe 4 being crushed by the auxiliary box main shaft 3 during the assembly of the auxiliary box assembly, while reducing the assembly difficulty of the production line and greatly improving the assembly efficiency of the production line.

[0043] The utility model optimizes the oil guide pipe structure between the secondary shaft 1 and the auxiliary box main shaft 3, such as Figure 4 Assembly diagram, the specific assembly process is: the transmission main case is placed vertically, the second shaft 1 is vertically upward, and then the cylindrical section at the front end of the oil guide pipe 4, that is, the first pipe section 41, is placed in the oil hole at the rear end of the second shaft 1, and the auxiliary case assembly falls downward, so that the rear end bell mouth of the oil guide pipe 4, that is, the fourth pipe section 44, is inserted into the oil hole at the front end of the auxiliary case main shaft 3. In the forced lubrication system, the flow path of the lubricating oil is: the central oil passage of the auxiliary case main shaft 3 → oil guide pipe 4 → the central oil passage of the second shaft 1.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil guide pipe between the second shaft of a transmission and the main shaft of an auxiliary box, characterized in that: One end of the oil guide pipe (4) is a bell-mouth structure, and the other end is a cylindrical structure; when the oil guide pipe is used, one end of the bell-mouth structure is connected to the main shaft (3), and one end of the cylindrical structure is connected to the second shaft (1).

2. The oil guide pipe between the secondary shaft of the transmission and the auxiliary gearbox main shaft according to claim 1, characterized in that: The oil guide pipe (4) comprises a first pipe section (41), a second pipe section (42), a third pipe section (43) and a fourth pipe section (44) which are integrally arranged; the first pipe section (41) is a cylindrical structure, and the fourth pipe section (44) is a bell-mouth structure.

3. The oil guide pipe between the secondary transmission shaft and the auxiliary gearbox main shaft according to claim 2, characterized in that: The length of the first pipe section (41) is greater than the depth of the oil guide pipe installation hole on the second shaft (1).

4. The oil guide pipe between the secondary shaft of the transmission and the auxiliary gearbox main shaft according to claim 2, characterized in that: The length of the first tube section (41) is 12-15 mm.

5. The oil guide pipe between the secondary shaft of the transmission and the auxiliary gearbox main shaft according to claim 2, characterized in that: The first pipe section (41) is clearance-matched with the two shafts (1).

6. The oil guide pipe between the secondary shaft of the transmission and the auxiliary gearbox main shaft according to claim 2, characterized in that: The matching clearance between the first pipe section (41) and the two shafts (1) is less than 0.2 mm.

7. The oil guide pipe between the secondary shaft of the transmission and the auxiliary gearbox main shaft according to claim 2, characterized in that: The fourth pipe section (44) is clearance-matched with the main shaft (3).

8. The oil guide pipe between the secondary shaft of the transmission and the auxiliary gearbox main shaft according to claim 2, characterized in that: The second pipe section (42) is an arc structure.

9. The oil guide pipe between the secondary shaft of the transmission and the auxiliary gearbox main shaft according to claim 1, characterized in that: After the oil guide pipe (4) is connected to the two shafts (1), the maximum included angle between the axis of the oil guide pipe (4) and the axis of the two shafts (1) is 2.8°.

10. A transmission, characterized in that: It comprises an oil guide pipe between the second shaft of a transmission and the main shaft of an auxiliary box as described in any one of claims 1 to 9.

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