Power transmission structure and grader

Abstract

This utility model belongs to the technical field of engineering machinery, and discloses a power transmission structure and a grader. The power transmission structure includes a driven disc hub, a support base, and a drive shaft. The driven disc hub includes a connecting disc and an output shaft disposed on one side of the connecting disc. The connecting disc is fixedly connected to a flywheel by screws. The support base is connected to the machine housing and is provided with a mounting hole. The output shaft is rotatably connected to the mounting hole. One end of the drive shaft is connected to the output shaft, and the other end is connected to the input shaft. The flywheel is connected to the connecting disc so that when the flywheel rotates, it can drive the output shaft to rotate through the connecting disc, thereby driving the input shaft of the gearbox to rotate through the drive shaft. In the above structure, the gearbox applies stress to the output shaft through the drive shaft, and the output shaft is rotatably disposed in the mounting hole, so that the support base provides support force to the output shaft, thereby avoiding stress transmission to the flywheel and solving the problem of deformation of the engine rear cylinder block caused by excessive weight of the gearbox.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a power transmission structure and a grader. Background Technology

[0002] In existing graders, the engine and gearbox are directly coupled, meaning the flywheel at the engine output is bolted directly to the elastic plate at the gearbox input, and the gearbox housing is also bolted to the engine housing. Due to the gearbox's significant weight, it exerts considerable stress on the engine's flywheel and housing. When the grader operates in uneven mining areas, this stress may cause deformation of the engine's rear cylinder block, reducing the grader's lifespan. Utility Model Content

[0003] The purpose of this utility model is to provide a power transmission structure and a grader. By connecting the power transmission structure between the engine and the gearbox, the gearbox is not directly connected to the engine, thus avoiding the problem of deformation of the engine's rear cylinder block caused by the excessive weight of the gearbox.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A power transmission structure for connecting an engine and a gearbox, wherein the engine includes a housing and a flywheel rotatably disposed within the housing, and the gearbox is provided with an input shaft; the power transmission structure includes:

[0006] The driven hub includes a connecting plate and an output shaft disposed on one side of the connecting plate. The axis of the output shaft coincides with the center line of the connecting plate, and the connecting plate is connected to the flywheel.

[0007] A support base is provided with mounting holes, the support base is connected to the housing, and the output shaft is rotatably connected to the mounting holes;

[0008] The drive shaft is connected at one end to the output shaft and at the other end to the input shaft.

[0009] As an alternative, the outer peripheral surface of the output shaft and the inner wall of the mounting hole are rotatably connected by a wear-resistant component.

[0010] As an optional feature, the output shaft is provided with a shoulder;

[0011] The power transmission structure also includes an output flange sleeve, which includes an output flange plate and an output shaft sleeve disposed on one side of the output flange plate. The output shaft sleeve is fixedly sleeved on the output shaft. One end of the transmission shaft is connected to the output flange plate. The wear-resistant part is located between the shaft shoulder and the output shaft sleeve.

[0012] As an optional solution, the power transmission structure further includes a positioning plate, which is connected to the end face of the output shaft and presses against the output flange.

[0013] As an alternative, the output shaft sleeve and the output shaft are configured with a key connection.

[0014] As an optional solution, a first sealing ring is provided between the outer peripheral surface of the shoulder and the inner wall of the mounting hole; a second sealing ring is provided between the outer peripheral surface of the output shaft sleeve and the inner wall of the mounting hole.

[0015] As an optional solution, the outer peripheral surface of the output shaft sleeve is also provided with a sealing retaining ring, which extends into the mounting hole and is located between the second sealing ring and the output flange, and has a set gap with the inner wall of the mounting hole.

[0016] As an alternative, the wear-resistant component is a deep groove ball bearing or a wear-resistant bushing.

[0017] As an optional solution, the driven disc hub also includes a positioning shaft disposed on the other side of the connecting disc, the positioning shaft and the output shaft axis are coincident, the flywheel is provided with a positioning groove, and the positioning shaft is inserted into the positioning groove.

[0018] A grader includes an engine, a gearbox, and a power transmission structure as described in any of the above embodiments, wherein the power transmission structure is connected between the engine and the gearbox.

[0019] The beneficial effects of this utility model are:

[0020] The power transmission structure provided by this utility model is connected to the flywheel via a connecting disc, so that when the flywheel rotates, it can drive the output shaft to rotate via the connecting disc, thereby driving the input shaft of the gearbox to rotate via the transmission shaft. In the above structure, the gearbox applies stress to the output shaft via the transmission shaft, and the output shaft is rotatably mounted in the mounting hole, so that the support seat provides support for the output shaft, thereby avoiding stress transmission to the flywheel, effectively ensuring that the engine is not affected by the above stress, and solving the problem of deformation of the engine rear cylinder block caused by excessive gearbox weight. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the connection structure of the engine, gearbox, and power transmission structure involved in the embodiments of this utility model;

[0022] Figure 2 This is a cross-sectional view of the connection structure of the engine, gearbox, and power transmission structure involved in the embodiments of this utility model;

[0023] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle;

[0024] Figure 4 A schematic diagram of the driven disc hub involved in this embodiment of the utility model.

[0025] In the picture:

[0026] 10. Power transmission structure; 11. Driven disc hub; 111. Connecting disc; 112. Output shaft; 1121. Shaft shoulder; 113. Positioning shaft; 12. Support seat; 121. Oil injection hole; 13. Drive shaft; 14. Wear-resistant parts; 15. Output flange sleeve; 151. Output flange; 152. Output shaft sleeve; 16. Positioning pressure plate; 17. First sealing ring; 18. Second sealing ring; 19. Sealing retaining ring;

[0027] 20. Engine; 21. Housing; 22. Flywheel;

[0028] 30. Gearbox; 31. Input shaft. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] This utility model embodiment provides a power transmission structure 10 for connecting an engine 20 and a gearbox 30. The engine 20 includes a housing 21 and a flywheel 22 rotatably disposed within the housing 21. The gearbox 30 is provided with an input shaft 31.

[0034] like Figures 1-4 As shown, the power transmission structure 10 includes a driven hub 11, a support base 12, and a drive shaft 13. The driven hub 11 includes a connecting plate 111 and an output shaft 112 disposed on one side of the connecting plate 111. The axis of the output shaft 112 coincides with the center line of the connecting plate 111. The connecting plate 111 is fixedly connected to the flywheel 22 by screws, so that the flywheel 22 of the engine 20 can drive the driven hub 11 to rotate simultaneously when it rotates. The support base 12 is fixedly connected to the housing 21 by screws, and the support base 12 is provided with mounting holes. The output shaft 112 is rotatably connected to the mounting holes, so that the support base 12 can support the output shaft 112 through the mounting holes. One end of the drive shaft 13 is connected to the output shaft 112, and the other end is connected to the input shaft 31.

[0035] The flywheel 22 is connected to the connecting plate 111 so that when the flywheel 22 rotates, it can drive the output shaft 112 to rotate through the connecting plate 111. This, in turn, drives the input shaft 31 of the gearbox 30 to rotate through the transmission shaft 13. In the above structure, the gearbox 30 applies stress to the output shaft 112 through the transmission shaft 13. The output shaft 112 is rotatably mounted in the mounting hole, so that the support seat 12 provides support for the output shaft 112. This avoids stress transmission to the flywheel 22, effectively ensuring that the engine 20 is not affected by the above stress, and solving the problem of deformation of the rear cylinder block of the engine 20 caused by the excessive weight of the gearbox 30.

[0036] To reduce wear on the output shaft 112 and the support seat 12, a wear-resistant part 14 may be provided between the outer peripheral surface of the output shaft 112 and the inner wall of the mounting hole. The output shaft 112 and the support seat 12 are rotatably connected through the wear-resistant part 14, which can effectively prevent direct friction between the output shaft 112 and the support seat 12, effectively reduce wear, and improve the service life of the parts.

[0037] Alternatively, the wear-resistant part 14 can be a deep groove ball bearing or a wear-resistant bushing.

[0038] To prevent axial movement of the wear-resistant part 14, such as Figures 3-4As shown, the output shaft 112 has a shoulder 1121 on the side near the connecting plate 111. The power transmission structure 10 also includes an output flange sleeve 15, which includes an output flange 151 and an output shaft sleeve 152 disposed on one side of the output flange 151. The output shaft sleeve 152 is fixedly fitted onto the output shaft 112 and extends into the mounting hole, allowing the output shaft 112 to drive the output flange sleeve 15 to rotate. One end of the transmission shaft 13 is connected to the output flange 151 (which can be fixed with screws). The wear-resistant part 14 is positioned between the shoulder 1121 and the output shaft sleeve 152, meaning that both ends of the wear-resistant part 14 abut against the output shaft sleeve 152 and the shoulder 1121, respectively. This structure, by providing the output flange sleeve 15, not only limits the position of the wear-resistant part 14 but also allows the transmission shaft 13 to be fixedly connected to the output shaft 112 via the connection to the output flange 151, making the connection between the input shaft 31 and the transmission shaft 13 convenient.

[0039] Optionally, the output sleeve 152 and the output shaft 112 are configured with a key connection. The output sleeve 152 and the output shaft 112 can be connected by a flat key or by a spline connection, which enables the transmission of greater torque.

[0040] Furthermore, the power transmission structure 10 also includes a positioning plate 16, which is connected to the end face of the output shaft 112 (it can be fixedly connected with screws). The positioning plate 16 can press against the output flange 151. By pressing the output flange 151 with the positioning plate 16, the output flange sleeve 15 can be installed on the output shaft 112, and the output shaft sleeve 152 can press against the wear-resistant part 14, thereby preventing the output flange sleeve 15 from moving along the axis of the output shaft 112, making the structure more stable.

[0041] To prevent the positioning plate 16 from interfering with the drive shaft 13 and to facilitate the connection between the drive shaft 13 and the output flange 151, a relief groove is provided on the side of the output flange 151 away from the output shaft sleeve 152. When the positioning plate 16 is connected to the end face of the output flange 151, the positioning plate 16 is located in the relief groove and presses against the bottom surface of the relief groove.

[0042] To prevent dust and other particulate impurities from entering and contaminating the wear-resistant part 14, a first sealing ring 17 is provided between the outer peripheral surface of the shoulder 1121 and the inner wall of the mounting hole; a second sealing ring 18 is provided between the outer peripheral surface of the output shaft sleeve 152 and the inner wall of the mounting hole. By placing the first sealing ring 17 and the second sealing ring 18 on both sides of the wear-resistant part 14, it is possible to effectively prevent dust and other particulate impurities from entering the mounting hole located between the first sealing ring 17 and the second sealing ring 18, thereby improving the service life of the wear-resistant part 14.

[0043] In this embodiment, both the first sealing ring 17 and the second sealing ring 18 are skeleton oil seals.

[0044] Since the second sealing ring 18 is located on the outer side of the mounting hole, away from the driven hub 11, this side is more susceptible to dust contamination. To further improve the dustproof performance on this side, a sealing retaining ring 19 is also provided on the outer circumferential surface of the output shaft sleeve 152. The sealing retaining ring 19 extends into the mounting hole and is located between the second sealing ring 18 and the output flange 151. A set gap (which can be set to no more than 2 mm) exists between the sealing retaining ring 19 and the inner wall of the mounting hole. This set gap is used to prevent the sealing retaining ring 19 from rubbing against the inner wall of the mounting hole when it rotates with the output shaft 112. By adding a sealing retaining ring 19 on this side, dust and other particles are first blocked by the sealing retaining ring 19, and then the second sealing ring 18 provides secondary blocking, thus improving the sealing performance.

[0045] In this embodiment, the sealing ring 19 and the output shaft sleeve 152 are interference fit. By pressing the sealing ring 19 into the outer circumferential surface of the output shaft sleeve 152, the use of fasteners is avoided, making installation more convenient and providing better sealing performance.

[0046] To ensure accurate positioning during installation of the driven disc hub 11 and flywheel 22, such as Figure 4 and combined Figure 2 As shown, a positioning shaft 113 is provided on the other side of the connecting plate 111, and the axis of the positioning shaft 113 coincides with the axis of the output shaft 112; the flywheel 22 is provided with a positioning groove, and when the connecting plate 111 is connected to the flywheel 22, the positioning shaft 113 is inserted into the positioning groove to facilitate the connection of the driven plate hub 11 with the flywheel 22.

[0047] To facilitate lubrication of the wear-resistant part 14, the support base 12 is provided with an oil injection hole 121. Lubricating grease can be added into the mounting hole through the oil injection hole 121 to lubricate the wear-resistant part 14.

[0048] This utility model embodiment also provides a grader, including an engine 20, a gearbox 30, and the aforementioned power transmission structure 10. By connecting the power transmission structure 10 between the gearbox 30 and the engine 20, the problem of deformation of the rear cylinder of the engine 20 caused by the excessive weight of the gearbox 30 is avoided.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A power transmission structure for connecting an engine (20) and a gearbox (30), wherein the engine (20) includes a housing (21) and a flywheel (22) rotatably disposed within the housing (21), and the gearbox (30) is provided with an input shaft (31); characterized in that, The power transmission structure (10) includes: Driven hub (11) includes a connecting plate (111) and an output shaft (112) disposed on one side of the connecting plate (111). The axis of the output shaft (112) coincides with the center line of the connecting plate (111). The connecting plate (111) is connected to the flywheel (22). A support base (12) is provided with a mounting hole. The support base (12) is connected to the housing (21), and the output shaft (112) is rotatably connected to the mounting hole. The drive shaft (13) is connected at one end to the output shaft (112) and at the other end to the input shaft (31).

2. The power transmission structure according to claim 1, characterized in that, The outer peripheral surface of the output shaft (112) and the inner wall of the mounting hole are rotatably connected by a wear-resistant component (14).

3. The power transmission structure according to claim 2, characterized in that, The output shaft (112) is provided with a shoulder (1121); The power transmission structure (10) further includes an output flange sleeve (15), which includes an output flange (151) and an output shaft sleeve (152) disposed on one side of the output flange (151). The output shaft sleeve (152) is fixedly sleeved on the output shaft (112). One end of the transmission shaft (13) is connected to the output flange (151). The wear-resistant part (14) is located between the shaft shoulder (1121) and the output shaft sleeve (152).

4. The power transmission structure according to claim 3, characterized in that, The power transmission structure (10) also includes a positioning plate (16), which is connected to the end face of the output shaft (112) and presses against the output flange (151).

5. The power transmission structure according to claim 3, characterized in that, The output shaft sleeve (152) and the output shaft (112) are connected by a key.

6. The power transmission structure according to claim 3, characterized in that, A first sealing ring (17) is provided between the outer peripheral surface of the shoulder (1121) and the inner wall of the mounting hole; a second sealing ring (18) is provided between the outer peripheral surface of the output shaft sleeve (152) and the inner wall of the mounting hole.

7. The power transmission structure according to claim 6, characterized in that, The outer circumferential surface of the output shaft sleeve (152) is also provided with a sealing retaining ring (19), which extends into the mounting hole and is located between the second sealing ring (18) and the output flange (151), and has a set gap with the inner wall of the mounting hole.

8. The power transmission structure according to claim 2, characterized in that, The wear-resistant part (14) is a deep groove ball bearing or a wear-resistant bushing.

9. The power transmission structure according to claim 1, characterized in that, The driven hub (11) also includes a positioning shaft (113) disposed on the other side of the connecting disk (111). The positioning shaft (113) and the output shaft (112) have the same axis. The flywheel (22) is provided with a positioning groove, and the positioning shaft (113) is inserted into the positioning groove.

10. A grader, characterized in that, It includes an engine (20), a gearbox (30), and a power transmission structure (10) as described in any one of claims 1-9, wherein the power transmission structure (10) is connected between the engine (20) and the gearbox (30).

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