Vehicle and gearbox thereof

Abstract

The present invention discloses a gearbox, comprising an input shaft; a main shaft connected to the end of the input shaft through a tapered roller bearing; wherein the outer ring of the tapered roller bearing is arranged at the end of the input shaft, the end of the input shaft protrudes from the mounting end surface of the outer ring and forms a mounting light hole, an annular oil retaining mechanism is arranged in the mounting light hole, and the inner diameter of the oil retaining mechanism is smaller than the aperture of the mounting end of the outer ring. The above gearbox can reduce the loss of oil in the tapered roller bearing, and solves the problem of insufficient lubrication of the tapered roller bearing. In addition, the present invention also discloses a vehicle comprising the above gearbox.

Description

Technical Field

[0001] The present invention relates to the technical field of oil seals, and in particular to a gearbox. In addition, the present invention also relates to a vehicle comprising the gearbox. Background Art

[0002] The gearbox in the vehicle transmission system mainly adopts a gear shaft structure, which inevitably requires the installation of bearings. In order to increase the service life of the bearings, the bearings should be forced to be lubricated to avoid the situation where the bearings cannot be fully lubricated due to complex road conditions.

[0003] At present, a tapered roller bearing is provided between the main shaft and the input shaft in the gearbox. The input shaft and the main shaft are arranged in sequence from front to rear relative to the vehicle body. The inner ring of the tapered roller bearing is connected to the input shaft. An oil passage is provided between the input shaft and the tapered roller bearing to allow the engine oil to flow to the tapered roller bearing. However, when the vehicle body is in a state where the front is high and the rear is low, the engine oil will flow along the inclined supporting surface of the tapered roller bearing, thereby causing the problem of insufficient lubrication of the tapered roller bearing. Summary of the invention

[0004] The object of the present invention is to provide a gearbox which can reduce the loss of oil in the tapered roller bearing and solve the problem of insufficient lubrication of the tapered roller bearing. Another object of the present invention is to provide a vehicle including the above gearbox.

[0005] To achieve the above-mentioned purpose, the present invention provides a gearbox, comprising: an input shaft; a main shaft connected to the end of the input shaft through a tapered roller bearing; wherein the outer ring of the tapered roller bearing is arranged at the end of the input shaft, the end of the input shaft protrudes from the mounting end surface of the outer ring and forms a mounting light hole, an annular oil retaining mechanism is arranged in the mounting light hole, and the inner diameter of the oil retaining mechanism is smaller than the hole diameter of the mounting end of the outer ring.

[0006] Preferably, the outer ring is integrally formed with the input shaft; the inner ring of the tapered roller bearing is sleeved on the main shaft, and the rollers of the tapered roller bearing are arranged on the inner ring.

[0007] Preferably, the oil deflector mechanism comprises: an oil deflector ring arranged in the mounting light hole; a skeleton which is annular and nested in the mounting light hole and is used to fix the oil deflector ring; wherein the aperture of the oil deflector ring is smaller than the aperture of the mounting end of the outer ring, and the oil deflector ring and the skeleton are arranged in sequence in a direction away from the outer ring.

[0008] Preferably, the oil deflector ring is specifically an oil deflector soft ring, the aperture of the oil deflector soft ring is smaller than the major diameter of the mounting end of the roller, and the oil deflector soft ring is provided with an opening.

[0009] Preferably, the material of the oil retaining soft ring is synthetic rubber.

[0010] Preferably, the skeleton comprises: a positioning end which abuts against the oil deflector ring and is used to cooperate with the mounting end face of the outer ring to clamp the oil deflector ring; and a connecting end which abuts against the hole wall of the mounting light hole; wherein the positioning end extends radially and the connecting end extends axially.

[0011] Preferably, the connecting end is interference fit with the mounting light hole.

[0012] Compared with the above background technology, the gearbox provided by the present invention reduces the loss of engine oil by arranging an oil retaining mechanism at the mounting end of the tapered roller bearing. Specifically, the oil retaining mechanism is arranged at the mounting end of the tapered roller bearing, and when the vehicle body is in a state where the front is high and the rear is low, the oil retaining mechanism blocks the engine oil and makes it gather at the mounting end of the tapered roller bearing, so as to reduce the loss of engine oil in the tapered roller bearing, and then the gathered engine oil lubricates the tapered roller bearing.

[0013] The present invention further provides a vehicle, comprising a gearbox as described in any one of the above items, wherein the input shaft is arranged close to the front of the vehicle, and the main shaft is arranged close to the rear of the vehicle.

[0014] Preferably, the vehicle is a heavy truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a gearbox provided by the present invention;

[0017] Figure 2 for Figure 1 A magnified view of part A;

[0018] Figure 3 A schematic diagram of an input shaft connected to an oil retaining mechanism provided by the present invention;

[0019] Figure 4 for Figure 3 A magnified view of part B;

[0020] Figure 5 A front view of an oil retaining mechanism provided by the present invention;

[0021] Figure 6 for Figure 5 sectional view of;

[0022] Figure 7 for Figure 6 Enlarged view of part C;

[0023] in,

[0024] 1-input shaft, 11-mounting hole, 12-oil channel, 21-outer ring, 22-inner ring, 23-roller, 3-main shaft, 4-oil deflector mechanism, 41-oil deflector ring, 411-opening, 42-skeleton, 421-positioning end, 422-connecting end. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Please refer to Figures 1 to 7 , Figure 1 A schematic diagram of the structure of a gearbox provided by the present invention; Figure 2 for Figure 1 A magnified view of part A; Figure 3 A schematic diagram of an input shaft connected to an oil retaining mechanism provided by the present invention; Figure 4 for Figure 3 A magnified view of part B; Figure 5 A front view of an oil retaining mechanism provided by the present invention; Figure 6 for Figure 5 sectional view of; Figure 7 for Figure 6 Magnified view of part C.

[0028] The present invention provides a gearbox, such as Figure 1 and Figure 2 As shown in FIG. 1 , the gearbox mainly includes an input shaft 1, a tapered roller bearing, a main shaft 3 and an oil retaining mechanism 4. The input shaft 1 has an oil passage 12 inside. Figure 3As shown, the oil passage 12 extends to its end so as to provide oil to the tapered roller bearing, thereby forcing the tapered roller bearing to be lubricated. The setting method of the oil passage 12 can refer to the prior art, and this article does not make any improvements thereto. The main shaft 3 is connected to the end of the input shaft 1 through the tapered roller bearing. Specifically, the inner ring 22 of the tapered roller bearing is sleeved on the end of the main shaft 3, and the roller 23 of the tapered roller bearing is mounted on the inner ring 22 by a retaining frame, and the outer ring 21 of the tapered roller bearing is arranged at the end of the input shaft 1, and the end of the input shaft 1 protrudes from the mounting of the outer ring 21. The end face forms a mounting light hole 11; the oil retaining mechanism 4 is annular, and its outer ring is against the hole wall of the mounting light hole 11, and its inner ring is used to block the oil from flowing out from the mounting end of the outer ring 21, which means that the inner ring diameter of the oil retaining mechanism 4 should be smaller than the aperture of the mounting end of the outer ring 21. When the vehicle body is in a state of high front and low rear, the oil will gather between the oil retaining mechanism 4 and the mounting end of the outer ring 21, reducing the oil loss in the tapered roller bearing, and then the above-mentioned gathered oil can still lubricate the tapered roller bearing, solving the problem of insufficient lubrication of the tapered roller bearing.

[0029] In the first embodiment, if Figures 1 to 4 As shown, in order to reduce the radial space occupied by the tapered roller bearing, the outer ring 21 of the tapered roller bearing is formed integrally with the input shaft 1, that is, by providing an inclined support surface of the outer ring 21 at the end of the input shaft 1, the radial size occupied by the outer ring 21 is saved to meet the design concept of lightweight vehicle. Of course, the outer ring 21 of the tapered roller bearing can also be sleeved on the end of the input shaft 1.

[0030] In the second embodiment, if Figure 2 as well as Figures 4 to 7 As shown, the oil deflector mechanism 4 includes: an oil deflector ring 41 and a skeleton 42 which are sequentially arranged in a direction away from the outer ring 21, wherein the oil deflector ring 41 can be arranged in the mounting light hole 11 and abut against the mounting end face of the outer ring 21, that is, the outer diameter of the oil deflector ring 41 is larger than the aperture of the mounting end of the outer ring 21, and in order to achieve oil blocking, the aperture of the oil deflector ring 41 is smaller than the aperture of the mounting end of the outer ring 21; the skeleton 42 is in a circular ring shape, which can be nested in the mounting light hole 11 and plays a role in fixing the oil deflector ring 41.

[0031] In the third embodiment, in order to further improve the oil retaining capacity of the oil retaining ring 41, as shown in FIG. Figure 2 As shown, the hole diameter of the oil retaining ring 41 is designed to be smaller than the major diameter of the mounting end of the roller 23. The so-called "major diameter of the mounting end of the roller 23" refers to the longest distance d from the mounting end of the roller 23 on the inner ring 22 to the axis of the input shaft 1.

[0032] Considering that the inner hole size of the oil retaining ring 41 is difficult for the inner ring 22 to pass through and cooperate with the outer ring 21, the oil retaining ring 41 is designed to be an oil retaining soft ring. Since the oil retaining soft ring is soft in texture, the inner ring 22 can make the oil retaining soft ring elastically deform and pass through the inner hole of the oil retaining soft ring. In order to extend the service life of the oil retaining soft ring, Figure 5 and Figure 6 As shown, an opening 411 is designed at the inner ring of the oil-deflecting soft ring, thereby reducing the deformation of the inner ring of the oil-deflecting soft ring.

[0033] Preferably, the oil retaining ring is made of synthetic rubber (such as nitrile rubber and fluororubber). Synthetic rubber material has the advantages of good elasticity, corrosion resistance and oil resistance. Of course, the oil retaining ring can also be made of other materials with good elasticity and oil resistance.

[0034] In the fourth embodiment, if Figure 7 As shown, the revolving cross-section of the skeleton 42 is L-shaped. From the perspective of its revolving cross-section, the skeleton 42 has a positioning end 421 and a connecting end 422. The positioning end 421 of the skeleton 42 extends radially and can abut against the oil deflector ring 41 to cooperate with the mounting end face of the outer ring 21 to clamp the oil deflector ring 41, thereby playing a role in fixing the oil deflector ring 41; the connecting end 422 of the skeleton 42 extends axially and can abut against the hole wall of the mounting light hole 11 so that the skeleton 42 can be fixed in the mounting light hole 11 to ensure that the relative position of the oil deflector mechanism 4 and the input shaft 1 is fixed.

[0035] Preferably, the connecting end 422 of the above-mentioned skeleton 42 is interference fit with the mounting light hole 11. Of course, an annular groove can also be set in the mounting light hole 11, and the outer end of the connecting end 422 of the skeleton 42 can be placed in the annular groove, and at the same time, the inner circle 22 of the connecting end 422 of the skeleton 42 can be protruded from the annular groove to achieve connection with the positioning end 421 of the skeleton 42.

[0036] It should be noted that other parts in the gearbox belong to the prior art, and this article does not make any improvements on them, so they will not be described in detail; the "radial" and "axial" in the present invention refer to the radial direction of the input shaft 1 and the axial direction of the input shaft 1 respectively, and the "installation end" is the end close to the main shaft 3 in the accompanying drawings.

[0037] A vehicle provided by the present invention mainly includes the gearbox as described above, wherein the input shaft 1 is arranged near the front of the vehicle, and the main shaft 3 is arranged near the rear of the vehicle, so that when the vehicle body is in a state of high front and low rear, the oil baffle mechanism 4 can reduce the loss of oil in the tapered roller bearing; preferably, the above-mentioned vehicle is specifically a heavy-duty truck, and other parts of the vehicle (or heavy-duty truck) can refer to the prior art and will not be expanded in this article.

[0038] The vehicle and the gearbox thereof provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A gearbox, characterized in that: include: Input shaft (1); A main shaft (3) connected to the end of the input shaft (1) via a tapered roller bearing; The outer ring (21) of the tapered roller bearing is arranged at the end of the input shaft (1), the end of the input shaft (1) protrudes from the mounting end surface of the outer ring (21) and forms a mounting light hole (11), an annular oil retaining mechanism (4) is arranged in the mounting light hole (11), and the inner diameter of the oil retaining mechanism (4) is smaller than the hole diameter of the mounting end of the outer ring (21); The oil blocking mechanism (4) comprises: An oil deflector ring (41) disposed in the mounting light hole (11); A framework (42) which is annular and nested in the mounting hole (11) and is used to fix the oil deflector ring (41); The aperture of the oil deflector ring (41) is smaller than the aperture of the mounting end of the outer ring (21), and the oil deflector ring (41) and the skeleton (42) are sequentially arranged in a direction away from the outer ring (21); The skeleton (42) has: A positioning end (421) abutting against the oil deflector ring (41) and used to cooperate with the mounting end surface of the outer ring (21) to clamp the oil deflector ring (41); A connecting end (422) abutting against a hole wall of the mounting light hole (11); Wherein, the positioning end (421) extends in the radial direction, and the connecting end (422) extends in the axial direction.

2. The gearbox according to claim 1, characterized in that: The outer ring (21) and the input shaft (1) are integrally formed; the inner ring (22) of the tapered roller bearing is sleeved on the main shaft (3), and the rollers (23) of the tapered roller bearing are arranged on the inner ring (22).

3. The gearbox according to claim 1 or 2, characterized in that: The oil deflector ring (41) is specifically an oil deflector soft ring, the hole diameter of the oil deflector soft ring is smaller than the major diameter of the mounting end of the roller (23), and the oil deflector soft ring is provided with an opening (411).

4. The gearbox according to claim 3, characterized in that: The material of the oil retaining soft ring is synthetic rubber.

5. The gearbox according to claim 4, characterized in that: The connection end (422) is interference-fitted with the mounting light hole (11).

6. A vehicle, characterized in that: It comprises a gearbox as claimed in any one of claims 1 to 5, wherein the input shaft (1) is arranged close to the front of the vehicle, and the main shaft (3) is arranged close to the rear of the vehicle.

7. The vehicle according to claim 6, characterized in that The vehicle is specifically a heavy truck.

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