Vibration damping device for transmission system and new energy construction machinery

Abstract

The present invention belongs to the technical field of vibration reduction of new energy engineering machinery, and discloses a vibration reduction device of a transmission system and a new energy engineering machinery. The transmission system includes a drive motor, a gearbox and a drive axle, and the gearbox is respectively connected to the drive motor and the drive axle by transmission; the vibration reduction device of the transmission system includes a main plate, a horizontal plate and a vertical plate, and the horizontal plate and the vertical plate are both fixedly connected to the main plate, and the main plate is connected to the gearbox, the horizontal plate is connected to the drive axle, and the vertical plate is connected to the drive motor. The vibration reduction device of the transmission system is fixedly connected to each other through the main plate, the horizontal plate and the vertical plate, and is respectively connected to the gearbox, the drive axle and the drive motor, forming a stable three-point connection structure, changing the force form, and transforming the transmission system from a cantilever structure to an integral structure, reducing the frequency of the pitch mode caused by the drive motor when driving the gearbox to rotate, reducing the vibration amplitude, and has a simple structure and is easy to install.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction for new energy construction machinery, and particularly to a vibration reduction device for a transmission system and new energy construction machinery. Background Art

[0002] As an important core for ensuring power transmission in new energy construction machinery, the service performance of the transmission system directly determines the working performance, reliability, and comfort of the whole vehicle. Compared with traditional engine vehicles, the transmission system of new energy is simplified. The input end of the gearbox is directly connected to the output shaft of the drive motor in a transmission connection, and the output end of the gearbox is connected to the transmission shaft of the drive axle in a transmission connection. This transmission system structure is extremely compact, and the input speed of the drive motor is relatively high, resulting in relatively large vibrations. Therefore, the vibrations generated by the drive motor are transmitted through the gearbox and then through the transmission shaft to the drive axle, causing vibrations of the whole vehicle of the new energy construction machinery.

[0003] In the prior art, a vibration reduction and noise reduction device for a pure electric vehicle transmission system has been proposed. By arranging a spline connection assembly and a flexible coupling between the output end of the gearbox and the transmission shaft, the spline connection assembly is arranged at the output end of the gearbox, and the spline connection assembly is connected to the transmission shaft through the flexible coupling. In this device, the spline connection assembly can reduce the centrifugal force and imbalance of the transmission shaft during rotation, and the flexible coupling can make the assembly processability of the whole vehicle better compared with the rigid connection structure, reducing the vibrations caused by assembly.

[0004] The starting point of the above device is that vibrations are transmitted from the transmission shaft to the drive axle. Therefore, the purpose of reducing vibrations can be achieved only by reducing the vibrations of the transmission shaft. However, this device cannot fundamentally solve the vibration problem of the drive motor.

[0005] Therefore, there is an urgent need for a vibration reduction device for a transmission system to fundamentally solve the vibration problem caused by the high-speed rotation of the drive motor. Summary of the Invention

[0006] An object of the present invention is to provide a vibration reduction device for a transmission system, which changes the force application form of the transmission system, can effectively suppress the vibrations of the transmission system fundamentally, reduces vibrations, and improves comfort.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A vibration reduction device for a transmission system, the transmission system includes a drive motor, a gearbox, and a drive axle. The gearbox is respectively connected to the drive motor and the drive axle in a transmission connection. The vibration reduction device for the transmission system includes:

[0009] A main body plate, which is connected to the gearbox;

[0010] A cross plate, fixedly connected to the main body plate, and the cross plate is connected to the drive axle;

[0011] A vertical plate, fixedly connected to the main body plate, and the vertical plate is connected to the drive motor.

[0012] As an alternative, the main body plate is in a triangular structure.

[0013] As an alternative, the damping device of the transmission system further includes an inclined beam, and two ends of the inclined beam are respectively fixedly connected to the main body plate and the vertical plate.

[0014] As an alternative, the damping device of the transmission system further includes a reinforcing rib, and the reinforcing rib is fixedly connected to both the main body plate and the cross plate at the same time.

[0015] As an alternative, mounting holes are provided on the main body plate, the cross plate and the vertical plate, and a plurality of bolts can respectively pass through the mounting holes on the main body plate, the cross plate and the vertical plate to be connected to the gearbox, the drive axle and the drive motor respectively.

[0016] As an alternative, two mounting holes are provided on the main body plate, the cross plate and the vertical plate.

[0017] As an alternative, the mounting hole is a long slot hole.

[0018] As an alternative, the cross plate and the vertical plate are both welded to the main body plate.

[0019] As an alternative, the main body plate is provided with a weight reduction opening.

[0020] Another object of the present invention is to provide a new energy construction machinery, including the damping device of the transmission system in any of the above solutions.

[0021] The beneficial effects of the present invention:

[0022] The present invention provides a vibration reduction device for a transmission system, which includes a drive motor, a gearbox and a drive axle, and the gearbox is respectively connected to the drive motor and the drive axle in a transmission manner; the vibration reduction device for the transmission system includes a main plate, a horizontal plate and a vertical plate, and the horizontal plate and the vertical plate are both fixedly connected to the main plate, and the main plate is connected to the gearbox, the horizontal plate is connected to the drive axle, and the vertical plate is connected to the drive motor. When the drive motor rotates at high speed, the modal analysis of the transmission system shows that the drive motor is in a pitch mode (that is, the output shaft of the drive motor swings up and down). The vibration damping device of the transmission system is fixedly connected to each other through the main plate, the horizontal plate and the vertical plate, and is respectively connected to the gearbox, the drive axle and the drive motor, so that the drive motor, the gearbox and the drive axle form a stable whole. When the drive motor swings up and down, it needs to drive the gearbox to swing, and the gearbox drives the drive axle to swing. The transmission systems that constitute the overall structure are connected to each other and restrain each other. The transmission system is transformed from a cantilever structure to an integral structure, and the force form is changed, which effectively suppresses the vibration generated by the drive motor from the root. The vibration damping device of the transmission system constitutes a stable three-point connection structure, which improves the natural frequency of the low-order mode of the transmission system, reduces the vibration amplitude, and has a simple structure and is easy to install.

[0023] The present invention provides a new energy engineering machinery that uses the above-mentioned transmission system vibration reduction device to effectively reduce the vibration of the transmission system, improve the comfort of the new energy engineering machinery, and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the connection between the vibration reduction device of the transmission system and the transmission system according to an embodiment of the present invention;

[0025] Figure 2 2 is a schematic structural diagram of a vibration reduction device for a transmission system according to an embodiment of the present invention.

[0026] In the figure:

[0027] 100, drive motor; 200, gearbox; 300, drive axle;

[0028] 1. Vibration damping device of the transmission system; 11. Main body plate; 111. Weight reduction opening; 12. Horizontal plate; 13. Vertical plate; 14. Diagonal beam; 15. Reinforcement rib; 16. Mounting hole. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0030] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, a mechanical connection, or an electrical connection. It may be directly connected, or indirectly connected through an intermediate medium. It may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0032] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] As Figure 1 - Figure 2 shown, an embodiment of the present invention provides a vibration damping device 1 for a transmission system, which is installed on the transmission system of a new energy construction machinery to reduce the vibration amplitude of the transmission system and improve the ride comfort of the new energy construction machinery. The transmission system of the new energy construction machinery includes a drive motor 100, a gearbox 200, and a drive axle 300. The output shaft of the drive motor 100 is in transmission connection with the input end of the gearbox 200, and the output end of the gearbox 200 is in transmission connection with the transmission shaft of the drive axle 300. The drive motor 100 drives the output shaft to rotate, and after deceleration by the gearbox 200, the power is transmitted to the drive axle 300. Since the rotational speed of the output shaft of the drive motor 100 is relatively high (the maximum rotational speed reaches 12,000 r / min) and the output torque is not stable, the overall amplitude of the transmission system is relatively large.

[0034] In the prior art, the problem of vehicle vibration is solved by reducing the vibration of the transmission shaft, and the vibration generated by the drive motor 100 cannot be fundamentally suppressed. Therefore, the vibration damping effect is not obvious. When the drive motor 100 rotates at a high speed, through the modal analysis of the transmission system, it can be seen that the overall transmission system presents a pitching mode (that is, the output shaft of the drive motor 100 sways up and down). For new energy construction machinery with high requirements for comfort, the vibration damping devices in the prior art cannot meet the current requirements.

[0035] The vibration damping device 1 of the transmission system in this embodiment includes a main body plate 11, a transverse plate 12, and a vertical plate 13. Among them, the transverse plate 12 is fixedly connected to one side surface of the main body plate 11, and the transverse plate 12 is perpendicular to the main body plate 11. The vertical plate 13 is fixedly connected to the other side surface of the main body plate 11, and the vertical plate 13 is parallel and attached to the main body plate 11 to reasonably arrange the parts. When in use, the main body plate 11 is connected to the transmission 200, the transverse plate 12 is connected to the drive axle 300, and the vertical plate 13 is connected to the drive motor 100, so that the transmission system becomes a stable whole.

[0036] The vibration damping device 1 of the transmission system is fixedly connected to each other through the main body plate 11, the transverse plate 12, and the vertical plate 13, and is respectively connected to the transmission 200, the drive axle 300, and the drive motor 100, forming a stable whole with the drive motor 100, the transmission 200, and the drive axle 300. When the drive motor 100 shakes up and down, since it is necessary to drive the transmission 200 to shake, the transmission 200 drives the drive axle 300 to shake. And the transmission system with an overall structure is connected to each other and restrains each other, transforming the cantilever type transmission system into an overall transmission system, so that the force form of the transmission system is transformed into an overall force form, effectively suppressing the vibration generated by the drive motor 100 fundamentally. The vibration damping device 1 of the transmission system forms a stable three-point connection structure, reducing the frequency of the pitch mode caused when the drive motor 100 drives the transmission 200 to rotate, reducing the vibration amplitude, effectively improving the natural frequency of the low-order mode of the transmission system, and having a simple structure and convenient installation.

[0037] Specifically, the main body plate 11 is a triangular structure, and the triangular main body plate 11 can bear stronger forces and has a more stable structure.

[0038] To further enhance the strength of the vertical plate 13, the vibration damping device 1 of the transmission system further includes an inclined beam 14, and both ends of the inclined beam 14 are fixedly connected to the main body plate 11 and the vertical plate 13 respectively. Referring to Figure 2 , the upper end of the vertical plate 13 is higher than the upper end of the main body plate 11. One end of the inclined beam 14 is fixedly connected to the main body plate 11, and the other end is fixedly connected to the upper end of the vertical plate 13 higher than the upper end of the main body plate 11, so as to form a triangular structure between the inclined beam 14, the vertical plate 13, and the main body plate 11, making the structure of the vertical plate 13 more stable.

[0039] To enhance the strength of the transverse plate 12, the vibration damping device 1 of the transmission system further includes a reinforcing rib 15, and the reinforcing rib 15 is fixedly connected to both the main body plate 11 and the transverse plate 12 at the same time. Continuing to refer to Figure 2 , the outer contour of the reinforcing rib 15 is a right triangle, and the two mutually perpendicular end faces of the right triangle reinforcing rib 15 are fixedly connected to the main body plate 11 and the transverse plate 12 respectively to improve the connection strength of the transverse plate 12.

[0040] To make the processing more convenient and improve the overall strength of the vibration damping device 1 of the transmission system, the main body plate 11, the transverse plate 12, the vertical plate 13, the inclined beam 14 and the reinforcing rib 15 are all fixed by welding.

[0041] The vibration damping device 1 of the transmission system is bolted to the transmission system to facilitate installation and disassembly. Specifically, mounting holes 16 are provided on the main body plate 11, the transverse plate 12 and the vertical plate 13, and a plurality of bolts can pass through the mounting holes 16 on the main body plate 11, the transverse plate 12 and the vertical plate 13 respectively to be connected to the gearbox 200, the drive axle 300 and the drive motor 100 respectively.

[0042] According to the layout of the gearbox 200, the drive axle 300 and the drive motor 100, the transverse plate 12 and the vertical plate 13 are located at the other end of the main body plate 11 away from the mounting holes 16, so that the connection between the vibration damping device 1 of the transmission system and the transmission system is more convenient and the structure is more reasonable.

[0043] Furthermore, in order to firmly connect the vibration damping device 1 of the transmission system to the transmission system, two mounting holes 16 are provided on the main body plate 11, the transverse plate 12 and the vertical plate 13. The main body plate 11, the transverse plate 12 and the vertical plate 13 are respectively connected to the gearbox 200, the drive axle 300 and the drive motor 100 by two bolts to make the connection more firm.

[0044] The mounting hole 16 is set as a long slot hole to reduce the assembly difficulty caused by machining errors.

[0045] In order to reduce the overall weight of the vibration damping device 1 of the transmission system, a weight reduction opening 111 is provided on the main body plate 11 to reduce the weight of the main body plate 11, and thus achieve the purpose of reducing the overall weight of the vibration damping device 1 of the transmission system.

[0046] The vibration damping device 1 of the transmission system has a simple structure, is convenient for processing and manufacturing, the materials are easy to obtain, and it is highly stable by welding and is connected to the transmission system by bolts, making disassembly and installation more convenient.

[0047] In the embodiment of the present invention, a new energy construction machinery is further provided. By installing the vibration damping device 1 of the transmission system on the transmission system of the new energy construction machinery, the vibration amplitude of the transmission system can be effectively reduced, the low-order modal natural frequency of the transmission system is effectively increased by 25%, greatly improving the comfort of the new energy construction machinery and enhancing the user experience feeling.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Vibration damping device for a transmission system, the transmission system comprising a drive motor (100), a gearbox (200) and a drive axle (300), the gearbox (200) being in transmission connection with the drive motor (100) and the drive axle (300) respectively, characterized in that, The shock absorber of the transmission system includes: A main body plate (11), which is connected to the gearbox (200); A transverse plate (12), fixedly connected to the main body plate (11), and the transverse plate (12) is connected to the drive axle (300); A vertical plate (13), fixedly connected to the main body plate (11), and the vertical plate (13) is connected to the drive motor (100); The main body plate (11) is of a triangular structure; The shock absorber of the transmission system further includes an inclined beam (14), and both ends of the inclined beam (14) are fixedly connected to the main body plate (11) and the vertical plate (13) respectively; The shock absorber of the transmission system further includes a reinforcing rib (15), and the reinforcing rib (15) is fixedly connected to both the main body plate (11) and the transverse plate (12) at the same time; The outer contour of the reinforcing rib (15) is a right triangle, and the two mutually perpendicular end faces of the right triangle-shaped reinforcing rib (15) are fixedly connected to the main body plate (11) and the transverse plate (12) respectively.

2. The vibration damping device of the transmission system according to claim 1, characterized in that, Mounting holes (16) are provided on the main body plate (11), the transverse plate (12) and the vertical plate (13), and a plurality of bolts can pass through the mounting holes (16) on the main body plate (11), the transverse plate (12) and the vertical plate (13) respectively to be connected to the gearbox (200), the drive axle (300) and the drive motor (100).

3. The vibration damping device of the transmission system according to claim 2, characterized in that, Two mounting holes (16) are provided on the main body plate (11), the transverse plate (12) and the vertical plate (13).

4. The vibration damping device of the transmission system according to claim 2, characterized in that, The mounting hole (16) is a long slot hole.

5. The vibration damping device of the transmission system according to claim 1, characterized in that, The transverse plate (12) and the vertical plate (13) are both welded to the main body plate (11).

6. The shock absorber of the transmission system according to claim 1, characterized in that The main body plate (11) is provided with a weight-reducing opening (111).

7. New energy construction machinery, characterized in that It includes the shock absorber of the transmission system according to any one of claims 1-6.

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