Transmission shaft assembly for engineering machinery and engineering machinery

Abstract

The utility model relates to a transmission shaft assembly and engineering machinery comprising the transmission shaft assembly. The transmission shaft assembly comprises a transmission shaft body, a transmission shaft support and a base plate. The transmission shaft body comprises a first transmission shaft and a second transmission shaft which can be in transmission connection. The transmission shaft bracket is directly connected with the first transmission shaft; the transmission shaft support is installed on a rack of the engineering machine through the base plate, so that the first transmission shaft and the second transmission shaft are matched to be on the same axis. According to the utility model, the first transmission shaft of the transmission shaft assembly is directly connected with the transmission shaft bracket, and the mounting height from the transmission shaft bracket to the rack of the engineering machinery can be adjusted through the base plate, so that the orientation of the central axis of the first transmission shaft can be adjusted to be aligned with the orientation of the central axis of the second transmission shaft; therefore, the connecting structure of the transmission shaft assembly is simplified, and the manufacturing and mounting cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission shafts of engineering machinery, in particular to a transmission shaft assembly for engineering machinery and engineering machinery comprising the transmission shaft assembly. Background Art

[0002] The drive shaft is an important component for transmitting power in the transmission system of construction machinery or motor vehicles. Its function is to transmit the power of the engine to the wheels together with the gearbox and drive axle, thereby driving the construction machinery or motor vehicle to move forward.

[0003] In conventional motor vehicles, particularly construction machinery, the distance between the front and rear drive axles is long, and the span of the drive shaft connecting them is large. Therefore, the drive shaft is typically constructed from multiple sections, with adjacent sections connected via universal joints to ensure coaxiality. For example, the transmission system of construction machinery may include components such as a front drive shaft, an intermediate drive shaft, a gearbox, and a rear drive shaft, with adjacent components connected via universal joints. Furthermore, a drive shaft support is typically provided between the front and intermediate drive shafts to support the drive shafts, with universal joints provided on either side of the drive shaft support to connect to the front and intermediate drive shafts, respectively. This type of drive shaft is complex in structure and expensive to manufacture and install. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above problems and / or other problems existing in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a drive shaft assembly for construction machinery is provided, comprising a drive shaft body, a drive shaft bracket, and a backing plate. The drive shaft body comprises a first drive shaft and a second drive shaft capable of transmission connection; the drive shaft bracket is directly connected to the first drive shaft; and the drive shaft bracket is mounted on the frame of the construction machinery via the backing plate, so that the first and second drive shafts are aligned on the same axis.

[0006] According to one embodiment of the present invention, the transmission shaft assembly includes a plurality of pads with different thicknesses.

[0007] According to one embodiment of the present invention, the transmission shaft bracket includes an annular shell portion and a plate-shaped portion formed at the bottom of the annular shell portion, the annular shell portion defines a cavity for receiving the first transmission shaft, and the plate-shaped portion extends in a direction perpendicular to the axial direction of the first transmission shaft.

[0008] According to one embodiment of the present invention, the pad is configured to be compatible with the shape of the plate-shaped portion.

[0009] According to one embodiment of the present invention, the plate-shaped portion has a bracket mounting hole, and the pad has a pad mounting hole corresponding to the bracket mounting hole. Bolts can pass through the bracket mounting hole and the pad mounting hole to fix the transmission shaft bracket to the frame via the pad.

[0010] According to one embodiment of the present invention, a bearing for receiving the first transmission shaft and a flexible gasket located between the bearing and the inner wall of the annular housing portion are provided in the cavity of the annular housing portion.

[0011] According to one embodiment of the present invention, the first transmission shaft is in transmission connection with the second transmission shaft via a first intermediate universal joint coupling.

[0012] According to one embodiment of the present invention, the transmission shaft assembly also includes a third transmission shaft, wherein the axial end of the first transmission shaft opposite to the second transmission shaft is intended to be connected to the front drive axle via a front end universal joint coupling, the axial end of the second transmission shaft opposite to the first transmission shaft is intended to be connected to the gearbox via an intermediate second universal joint coupling, and the third transmission shaft is intended to be connected to the gearbox via an intermediate third universal joint coupling at one end and to the rear drive axle via a rear end universal joint coupling at the other end.

[0013] According to another aspect of the present invention, a construction machine is provided. The construction machine includes the transmission shaft assembly as described above.

[0014] The present invention directly connects a first drive shaft (particularly the front drive shaft) to a drive shaft bracket to form an integrated drive shaft. A pad is used to adjust the installation height of the integrated drive shaft on the frame of the construction machinery. This allows the first drive shaft to be coaxial with, or maintain central axis alignment with, the connected second drive shaft (particularly the intermediate drive shaft). This eliminates the need for a universal joint coupling connected to the first drive shaft in known solutions, simplifies the connection structure of the entire drive shaft assembly, and reduces the manufacturing and installation costs of the drive shaft assembly.

[0015] It should be noted that, in the present invention, "direct connection" between two components means that there are no other parts between them except those necessary for the connection. It is understood that the direct connection between the first transmission shaft and the transmission shaft bracket means that the first transmission shaft can extend into the transmission shaft bracket, and there are no other parts between them except for necessary supporting parts such as bearings. In particular, the connection is no longer via a universal joint as in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limiting the present invention, wherein:

[0017] Figure 1 A schematic diagram showing a transmission system of an engineering machine, including a transmission shaft assembly according to the present utility model;

[0018] Figure 2 A perspective view showing a drive shaft assembly according to one embodiment of the present invention;

[0019] Figure 3 Show Figure 2 Drive shaft bracket of the drive shaft assembly in.

[0020] Description of reference numerals:

[0021] 10. Drive shaft body; 11. First drive shaft; 12. Second drive shaft; 20. Drive shaft bracket; 21. Annular shell portion; 22. Plate-shaped portion; 30. Pad; 40. First intermediate universal joint coupling; 50. Front end universal joint coupling; 60. Front drive axle; 70. Second intermediate universal joint coupling; 80. Gearbox; 90. Third drive shaft; 100. Third intermediate universal joint coupling; 110. Rear end universal joint coupling; 120. Rear drive axle. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented without some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be considered as elements or limitations of the claims unless expressly set forth in the claims.

[0023] In the following description, terms such as "first," "second," and the like are used to describe elements of the present application. These terms are only used to distinguish between the elements and are not used to limit the nature, order, or number of the elements. The terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components may be present in addition to the listed elements / components.

[0024] Figure 1The figure shows a schematic diagram of a transmission system for an engineering machine, which may include a drive shaft assembly according to an embodiment of the present invention, a front drive axle 60, a gearbox 80, and a rear drive axle 120. The front end of the drive shaft assembly may be connected to the front drive axle 60 via a front universal joint coupling 50, while the rear end may be connected to the rear drive axle 120 via a rear universal joint coupling 110, so that the engine power is transmitted to the front drive axle 60 and the rear drive axle 120 via the gearbox 80, thereby driving the front and rear wheels mounted on these drive axles to rotate.

[0025] Figure 2 FIG2 shows a perspective view of a transmission shaft assembly according to an embodiment of the present invention. Figure 2 As shown, the transmission shaft assembly according to this embodiment may include a transmission shaft body 10 , a transmission shaft bracket 20 and a backing plate 30 .

[0026] The drive shaft body 10 may include a first drive shaft 11 and a second drive shaft 12 in driving connection. The front end of the first drive shaft 11 is drivingly connected to the front drive axle 60 via a front universal joint 50, and the rear end is drivingly connected to the front end of the second drive shaft 12 via an intermediate first universal joint 40. The portion of the first drive shaft 11 intended for connection to the second drive shaft 12 passes through and is directly connected to the drive shaft bracket 20, thereby forming an integrated drive shaft body including the first drive shaft 11 and the drive shaft bracket 20. In this embodiment, the rear end of the second drive shaft 12 is drivingly connected to the gearbox 80 via an intermediate second universal joint 70.

[0027] The transmission shaft bracket 20 is mounted to the frame (not shown) of the engineering machinery via a backing plate 30, thereby supporting the first transmission shaft 11 and the second transmission shaft 12, which have a relatively large length, and ensuring smooth transmission of power between the two transmission shafts. For different models of engineering machinery, the distance from the first transmission shaft 11 and / or the second transmission shaft 12 to the frame may be different, which easily leads to installation requirements at different angles. By arranging the backing plate 30 between the transmission shaft bracket 20 and the frame, this difference in distance (also called installation height) can be accommodated, so that the first transmission shaft 11 and the second transmission shaft 12 can be adapted to be on the same axis without the need for a traditional universal joint coupling.

[0028] Optionally, the drive shaft assembly of the present invention may include multiple shims 30 of varying thicknesses. By selecting the appropriate thickness and number of shims 30, the distance between the drive shaft bracket 20 and the frame of different types of engineering machinery can be matched, thereby ensuring that the vertical distance (installation height) from the central axis of the first drive shaft 11 to the frame matches the height of, for example, a corresponding portion of the front drive axle, thereby ensuring the coaxiality of the first drive shaft 11 and the second drive shaft 12, particularly ensuring that their central axes are aligned or coincident.

[0029] refer to Figure 3 Combined with Figure 2 The drive shaft support 20 may include an annular housing portion 21 and a plate-shaped portion 22. The annular housing portion 21 defines a cavity for receiving the first drive shaft 11 (particularly the end portion of the first drive shaft 11 intended for transmission connection with the second drive shaft 12). The annular housing portion 21 may have a peripheral wall surrounding the outer circumference of the first drive shaft 11 and, if desired, may include cover plates on either side of the peripheral wall to seal the cavity. The plate-shaped portion 22 is formed at the bottom of the annular housing portion 21 and extends perpendicular to the axial direction of the first drive shaft 11. Therefore, when viewed in cross-section through the drive shaft support 20, the cross-section of the plate-shaped portion 22 lies tangentially to the annular housing portion 21 and parallel to the contact surface of the frame. The plate-shaped portion 22 may advantageously be configured to match the shape of the backing plate 30, such that when positioned between the plate-shaped portion 22 and the frame, the backing plate 30 can fully conform to the contact surface between the plate-shaped portion 22 and the frame.

[0030] Specifically, refer to Figure 3 The end portions of the plate-like portion 22 extending from both sides of the annular housing portion 21 may be provided with bracket mounting holes for passing bolts. Correspondingly, the backing plate 30 may be provided with backing plate mounting holes whose number and positions match the bracket mounting holes. Bolts may pass through the corresponding bracket mounting holes and backing plate mounting holes to secure the drive shaft bracket 20 and backing plate 30 to the frame. In this embodiment, the number of bracket mounting holes provided on each side end of the plate-like portion 22 includes, but is not limited to, one, and the number may be determined based on the width and length of the plate-like portion 22.

[0031] Advantageously, a bearing (not shown) and a flexible washer (not shown) may be disposed within the cavity of the annular housing portion 21. The bearing may be used to support the first transmission shaft 11 to facilitate its rotation. The flexible washer may be disposed between the bearing and the inner circumferential wall of the annular housing portion 21 to eliminate misalignment between the first transmission shaft 11 and the second transmission shaft 12 (i.e., deviation between their central axes) caused by the rigid connection between the first transmission shaft 11 and the transmission shaft bracket 20.

[0032] according to Figure 1-2In the illustrated embodiment, the propeller shaft assembly may further include a third propeller shaft 90, which may be connected to the gearbox 80 at one end (front end) via an intermediate third universal joint coupling 100, and connected to the rear drive axle 120 at the other end (rear end) via the rear universal joint coupling 110. In this case, the first propeller shaft 11 and the propeller shaft bracket 20 may be collectively referred to as an integrated front propeller shaft, the second propeller shaft 12 may be referred to as an intermediate propeller shaft, and the third propeller shaft 90 may be referred to as a rear propeller shaft.

[0033] The utility model also provides an engineering machine comprising the transmission shaft assembly.

[0034] Industrial Applicability

[0035] The transmission shaft assembly according to the present invention is particularly suitable for transmission systems of engineering machinery with a long distance between the gearbox and the drive axle or with multiple transmission shafts connected between the gearbox and the drive axle. However, it should be understood that the transmission shaft assembly according to the present invention can also be used in other equipment such as motor vehicles.

[0036] Conventional drive shafts are typically used to connect a transmission and axle. If the transmission and axle are far apart, multiple drive shafts are often connected via universal joints, with additional drive shaft supports used to support the multiple shafts. However, the position of the drive shaft supports is fixed, necessitating the addition of universal joints to adjust the position between adjacent drive shafts and the drive shaft supports. This inevitably complicates the overall structure of the drive shaft and increases manufacturing costs.

[0037] Compared to the prior art, the solution of the present invention is to directly connect the first transmission shaft 11 to the transmission shaft bracket 20, and to adjust the height of the transmission shaft bracket 20 to the frame of the engineering machinery via the pad 30, thereby adjusting the orientation of the central axis of the first transmission shaft 11 so that it can be adapted to the orientation of the central axis of the second transmission shaft 12 on the same axis (such as the horizontal axis). By replacing the transmission shaft support and universal joint coupling of the prior art with the pad 30 and the transmission shaft bracket 20, the connection structure of the transmission shaft is simplified and the manufacturing cost is reduced. By using pads 30 of different thicknesses to match the transmission shaft assembly with different models of engineering machinery, the requirements of different installation angles between the first transmission shaft 11 and the second transmission shaft 12 can be met, and it is ensured that the central axis of the entire transmission shaft assembly remains in the horizontal direction.

[0038] It will be apparent to those skilled in the art that various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the present invention. Other embodiments of the present invention will be apparent to those skilled in the art from the practice of the present invention as disclosed herein. This specification and the examples disclosed herein should be considered as illustrative only, and the true scope of the present invention is indicated by the appended claims and their equivalents.

Claims

1. A transmission shaft assembly for engineering machinery, characterized in that: The transmission shaft assembly includes: A transmission shaft body (10), the transmission shaft body (10) comprising a first transmission shaft (11) and a second transmission shaft (12) capable of transmission connection; a transmission shaft bracket (20), the transmission shaft bracket (20) being directly connected to the first transmission shaft (11); and Pad (30); The transmission shaft bracket (20) is mounted on the frame of the engineering machine via the backing plate (30), so that the first transmission shaft (11) and the second transmission shaft (12) are adapted to be on the same axis.

2. The transmission shaft assembly according to claim 1, wherein: The transmission shaft assembly includes a plurality of backing plates (30) having different thicknesses.

3. The transmission shaft assembly according to claim 1 or 2, characterized in that: The transmission shaft bracket (20) includes an annular housing portion (21) and a plate-shaped portion (22) formed at the bottom of the annular housing portion (21), wherein the annular housing portion (21) defines a cavity for receiving the first transmission shaft (11), and the plate-shaped portion (22) extends in a direction perpendicular to the axial direction of the first transmission shaft (11).

4. The transmission shaft assembly according to claim 3, characterized in that The backing plate (30) is configured to be adapted to the shape of the plate-shaped portion (22).

5. The transmission shaft assembly according to claim 4, characterized in that The plate-shaped portion (22) has a bracket mounting hole, and the backing plate (30) has a backing plate mounting hole corresponding to the bracket mounting hole; a bolt can pass through the bracket mounting hole and the backing plate mounting hole to fix the transmission shaft bracket (20) to the frame via the backing plate (30).

6. The transmission shaft assembly according to claim 3, wherein: A bearing for receiving the first transmission shaft (11) and a flexible washer located between the bearing and the inner wall of the annular housing portion (21) are provided in the cavity of the annular housing portion.

7. The transmission shaft assembly according to claim 6, wherein: The first transmission shaft (11) passes through the transmission shaft bracket (20) and is connected to the second transmission shaft (12) via a first intermediate universal joint coupling (40).

8. The transmission shaft assembly according to claim 7, wherein: The transmission shaft assembly also includes a third transmission shaft (90), wherein the axial end of the first transmission shaft (11) opposite to the second transmission shaft (12) is connected to the front drive axle (60) via a front end universal joint coupling (50), the axial end of the second transmission shaft (12) opposite to the first transmission shaft (11) is connected to the gearbox (80) via an intermediate second universal joint coupling (70), and the third transmission shaft (90) is connected to the gearbox (80) via an intermediate third universal joint coupling (100) at one end and is connected to the rear drive axle (120) via a rear end universal joint coupling (110) at the other end.

9. An engineering machine, characterized in that: It comprises a drive shaft assembly according to any one of claims 1 to 8.

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