Transmission and excavator loader having same

Abstract

The utility model relates to excavator loader technical field discloses a transmission and has its excavator loader, transmission includes: output shaft, one end of output shaft is used for with gearbox connection, flange, the other end of output shaft is connected with flange, fastener, fastener is located between flange and output shaft, fastener has the locking state of locking flange with output shaft, and fastener has the release state of unlocking flange with output shaft. The utility model discloses a fastener between output shaft and flange, one end of flange is arranged in the outer ring of output shaft, and the fastener is operated, makes fastener have the locking state of locking output shaft with flange, and have the release state of unlocking flange with output shaft, improve the reliability and stability of output shaft and flange connection, reach the purpose of reducing failure rate, solve the problem that the reliability of flange fixed mode on gearbox is poor, and the failure rate is high in prior art.

Description

Technical Field

[0001] This utility model relates to the field of excavator loader technology, specifically to a transmission device and an excavator loader having the same. Background Technology

[0002] The transmission system of construction machinery such as loaders, backhoe loaders, and wheeled excavators mainly consists of a gearbox and a drive axle. Power transmission between the gearbox and drive axle is achieved through a drive shaft and connecting flange. In existing technology, the connecting flange is typically directly nested on one end of the axle's output shaft without being secured, allowing the drive shaft to slide axially to a certain extent during use. While this type of structure is low-cost and easy to install, its actual performance is poor, maintenance is difficult, and the failure rate is high. Utility Model Content

[0003] In view of this, the present invention provides a transmission device and an excavator loader having the same, to solve the problem of unreliable connection between the output shaft and the flange in the prior art.

[0004] In a first aspect, the present invention provides a transmission device, comprising: an output shaft, one end of which is connected to a gearbox; a flange, the other end of which is connected to the flange; and a fastener located between the flange and the output shaft, the fastener having a locked state for locking the flange and the output shaft, and a released state for unlocking the flange and the output shaft.

[0005] By setting a fastener between the output shaft and the flange, with one end of the flange located on the outer ring of the output shaft, and operating the fastener to achieve both a locked state (locking the output shaft and the flange) and a released state (unlocking the flange and the output shaft), the reliability and stability of the connection between the output shaft and the flange are improved, thereby reducing the failure rate and solving the problems of poor reliability and high failure rate of the flange fixing method on the gearbox in the prior art.

[0006] In one alternative implementation, there are at least two fasteners.

[0007] In one optional embodiment, the output shaft is provided with an arc-shaped groove, which is arranged circumferentially along the output shaft. The flange is provided with at least two channel structures, which are arranged symmetrically along the radial direction of the flange. When the fasteners are in the locked state, at least two fasteners are respectively located in at least two channel structures and are engaged at opposite ends of the arc-shaped groove. This allows at least two fasteners to pass through one channel structure when the output shaft is inside the flange, and at least two fasteners are engaged with the arc-shaped groove. Thus, at least two fasteners limit the output shaft, preventing axial movement of the output shaft inside the flange and avoiding scratches on the output shaft and flange that could reduce the service life of the equipment.

[0008] In one optional embodiment, the channel structure includes a first channel structure and a second channel structure. Both the first and second channel structures include: at least two notch structures, each notch structure being disposed on the outer surface of the flange, and the at least two notch structures being symmetrically arranged radially along the flange; and at least two first through slots, each notch structure having a first through slot, the centerlines of the at least two first through slots coinciding, and the at least two first through slots forming a channel for fasteners to pass through, so that when the fastener passes through the channel structure, a fastening force can be applied from a symmetrical position on the flange. This symmetrical layout ensures uniform force distribution between the flange and the output shaft, avoiding flange deformation or output shaft misalignment due to excessive local force, thereby ensuring balanced torque distribution during power transmission.

[0009] In one optional implementation, the distance between the center of the first channel structure and the center of the second channel structure is a, and the diameter of the arc groove is b, where a > b. This provides installation space for the fastener insertion and prevents the distance between the center of the first channel structure and the center of the second channel structure from being too small, which could cause interference between the fastener and the output shaft.

[0010] In one optional embodiment, the transmission device further includes: a transmission shaft connected to the end of a flange away from the output shaft; a cross joint is provided at the end of the transmission shaft connected to the flange; a clearance groove is provided at the end of the flange facing the transmission shaft to avoid the cross joint; a lug structure is provided at the end of the flange away from the output shaft; a pressure plate is provided on one side of the cross joint; the pressure plate presses the cross joint and the lug structure together, further eliminating the gap between the cross joint and the lug structure, avoiding loosening of the connection due to vibration, reducing impact and energy loss during power transmission, and ensuring efficient operation of the transmission system.

[0011] In one optional embodiment, the lug structure is provided with a second through groove, and the pressure plate is provided with a third through groove. The second through groove and the third through groove are positioned correspondingly. The pressure plate and the lug structure are connected to the third through groove and the second through groove through a fastener. This arrangement makes the structure simple and reliable. In one alternative embodiment, the flange is provided with an internal spline, and the output shaft is provided with an external spline at the end near the flange. The internal spline and the external spline are matched to strictly limit the relative rotation between the flange and the output shaft, ensuring that the two maintain synchronous movement during transmission.

[0012] In one optional embodiment, the outer peripheral surface of the flange is further provided with at least two fourth through grooves, the at least two fourth through grooves being provided in a one-to-one correspondence with at least two channel structures, each fourth through groove being located between at least two first through grooves of each channel structure, the length of the fourth through groove extending along the axial direction of the flange, the depth of the fourth through groove extending along the radial direction of the flange, the fourth through groove being connected to the channel structure and connected to the through hole of the internal spline.

[0013] Secondly, this utility model also provides an excavator loader, including the transmission device described in the above embodiment.

[0014] Since excavator loaders include a transmission system, the technical effects of which have been described above and will not be repeated here. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is an exploded structural diagram of a transmission device according to an embodiment of the present utility model; Figure 2 This is a front view of a transmission device according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of a flange of a transmission device according to an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached figures: 10. Output shaft; 11. Arc-shaped groove; 20. Flange; 21. Channel structure; 211. Notch structure; 212. First through groove; 22. Lug structure; 221. Second through groove; 23. Fourth through groove; 30. Fasteners; 31. Bolts; 32. Nuts; 40. Drive shaft; 41. Cross-shaped connector; 50. Pressure plate; 51. Third through groove; 60. Fasteners. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0022] In related technologies, the connecting flange is typically nested directly onto the output shaft of the axle without being secured, allowing for a certain degree of axial sliding of the drive shaft during use. However, this structure has many significant drawbacks, severely impacting the normal operation and user experience of construction machinery.

[0023] First, power transmission is unstable and prone to power loss. Because the connecting flange is not securely fastened to the input and output shafts of the axle, relative displacement and gaps can easily occur between the drive shaft and the axle input and output shafts during equipment operation. When the construction machinery is under heavy load or undergoes sudden speed changes, the power transmission will experience shocks and fluctuations due to these gaps, resulting in power not being transmitted smoothly and efficiently to the drive wheels.

[0024] Secondly, it accelerates component wear and shortens service life. During the axial sliding process of the driveshaft, frequent friction and collisions occur on the contact surfaces of the connecting flange and the axle input / output shafts. Prolonged exposure to this condition can lead to wear, scratches, and even deformation on the surfaces of the connecting flange and the axle input / output shafts. Simultaneously, this unstable connection subjects the driveshaft to additional stress, easily causing bending and breakage. As the wear of various components intensifies, the service life of the entire transmission system is significantly shortened, requiring frequent parts replacement and increasing equipment maintenance costs. Furthermore, maintenance is difficult and downtime is increased. Because the connecting flange is not securely fastened to the axle input / output shaft, it is difficult to accurately determine the root cause of a malfunction during repairs. For example, when the transmission system experiences abnormal noises or vibrations, it may be due to excessive clearance between the connecting flange and the axle input / output shaft, or it may be a fault in other components. Maintenance personnel need to spend a significant amount of time troubleshooting, increasing the difficulty and workload of maintenance. In addition, due to rapid component wear, the equipment requires frequent downtime for repairs and parts replacement, severely impacting project progress. Finally, the high failure rate poses safety hazards. The loose connection between the connecting flange and the axle input / output shafts makes the transmission system prone to various malfunctions during operation. For example, excessive clearance may cause the drive shaft to detach, resulting in equipment damage and personal injury. Furthermore, unstable power transmission can affect the equipment's operational performance, making it difficult for the driver to accurately control the equipment and increasing safety risks during operation. In summary, the existing technology, which involves directly nesting one end of the connecting flange onto the input and output shafts of the axle without securing it, has certain advantages in terms of cost and ease of installation. However, it also has many disadvantages in terms of power transmission, component wear, maintenance difficulty, and safety, which seriously affect the performance and effectiveness of the construction machinery. Therefore, it needs to be improved and optimized. The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0025] According to an embodiment of the present invention, a transmission device is provided, comprising: an output shaft 10, one end of which is connected to a gearbox; a flange 20, the other end of which is connected to the flange 20; and a fastener 30, which is located between the flange 20 and the output shaft 10, the fastener 30 having a locked state that locks the flange 20 and the output shaft 10, and a released state that unlocks the flange 20 and the output shaft 10.

[0026] like Figure 1 , Figure 2 As shown, in this embodiment, by setting a fastener 30 between the output shaft 10 and the flange 20, with one end of the flange 20 located on the outer ring of the output shaft 10, the fastener 30 can be operated to have a locked state that locks the output shaft 10 and the flange 20 together, and a released state that unlocks the flange 20 from the output shaft 10. This improves the reliability and stability of the connection between the output shaft 10 and the flange 20 when the gearbox drives the flange 20 to rotate, thereby reducing the failure rate and solving the problem of poor reliability and high failure rate of the flange fixing method on the gearbox in the prior art.

[0027] In one embodiment, there are at least two fasteners 30.

[0028] In one embodiment, the output shaft 10 is provided with an arc-shaped groove 11, which is arranged along the circumference of the output shaft 10. The flange 20 is provided with at least two channel structures 21, which are arranged symmetrically along the radial direction of the flange 20. When the fasteners 30 are in the locked state, at least two fasteners 30 are respectively located in at least two channel structures 21, and at least two fasteners 30 are engaged at opposite ends of the arc-shaped groove 11.

[0029] Specifically, by providing at least two channel structures 21 on the flange 20 for fasteners 30 to pass through, and an arc groove 11 on the outer ring of the output shaft 10, when the output shaft 10 is located inside the flange 20, at least two fasteners 30 can pass through one channel structure 21 respectively, and at least two fasteners 30 are engaged with the arc groove 11. Thus, at least two fasteners 30 limit the output shaft 10, preventing the output shaft 10 from moving axially inside the flange 20, and avoiding scratches between the output shaft 10 and the flange 20, which would reduce the service life of the equipment.

[0030] In this embodiment, the fastener 30 includes a bolt 31 and a nut 32. After the bolt passes through the channel structure 21, the nut 32 is tightened to achieve the fastening of the output shaft 10 and the flange 20.

[0031] In other embodiments, the type of fastener 30 is not limited to this; cylindrical pins or tapered pins may also be used. The fastening is achieved through an interference fit between the pin and the hole. Tapered pins have self-locking properties and are not easily loosened under vibration. Cylindrical pins need to be used in conjunction with other anti-loosening measures (such as cotter pins, adhesive coating inside the pin hole, etc.).

[0032] In one embodiment, such as Figure 3 As shown, the channel structure 21 includes a first channel structure and a second channel structure. Both the first channel structure and the second channel structure include: at least two notch structures 211, each notch structure 211 is disposed on the outer surface of the flange 20, and the at least two notch structures 211 are symmetrically disposed along the radial direction of the flange 20; at least two first through slots 212, each notch structure 211 is provided with a first through slot 212, the center lines of the at least two first through slots 212 coincide, and the at least two first through slots 212 form a channel for the fastener 30 to pass through.

[0033] Specifically, at least two notch structures 211 are arranged symmetrically along the radial direction of the flange 20, and the center lines of the first through slots 212 on each notch structure 211 coincide. This allows the fastener 30 to apply a tightening force from the symmetrical position of the flange 20 when it passes through the channel structure 21. This symmetrical layout ensures uniform force distribution between the flange 20 and the output shaft 10, avoiding deformation of the flange 20 or uneven load on the output shaft 10 due to excessive local force, thereby ensuring a balanced torque distribution during power transmission.

[0034] In one embodiment, the distance between the center of the first channel structure and the center of the second channel structure is 'a', and the diameter of the arc groove 11 is 'b', where a > b. This configuration provides installation space for the insertion of the fastener 30, preventing the distance between the centers of the first and second channel structures from being too small, which could cause interference between the fastener 30 and the output shaft 10.

[0035] In one embodiment, the transmission device further includes: a transmission shaft 40, which is connected to the end of the flange 20 away from the output shaft 10. The end of the transmission shaft 40 connected to the flange 20 is provided with a cross 41. The end of the flange 20 facing the transmission shaft 40 is provided with a relief groove to avoid the cross 41. The end of the flange 20 away from the output shaft 10 is provided with a lug structure 22. A pressure plate 50 is provided on one side of the cross 41, and the pressure plate 50 presses the cross 41 and the lug structure 22 together.

[0036] Specifically, the drive shaft 40 is connected to the lug structure 22 of the flange 20 via a universal joint 41. The universal joint 41, as a universal joint component, effectively compensates for the angular deviation between the drive shaft 40 and the flange 20, ensuring stable power transmission during equipment operation (such as during turning or bumping). The pressure plate 50 presses the universal joint 41 tightly and connects it to the lug structure 22, further eliminating the gap between them, preventing loosening due to vibration, reducing impact and energy loss during power transmission, and ensuring efficient operation of the transmission system. The clearance groove on the end of the flange 20 facing the drive shaft 40 provides dedicated space for the universal joint 41, preventing collisions and friction between the universal joint 41 and the flange 20 during rotation or oscillation.

[0037] In one embodiment, the lug structure 22 is provided with a second through groove 221, and the pressure plate 50 is provided with a third through groove 51. The second through groove 221 and the third through groove 51 are positioned correspondingly, and the pressure plate 50 and the lug structure 22 are connected to the third through groove 51 and the second through groove 221 by a fastener 60.

[0038] In this embodiment, there are two lug structures 22, and correspondingly, there are two pressure plates 50. The two lug structures 22 are symmetrically arranged, and the two pressure plates 50 are also symmetrically arranged, which ensures that the pressure plates 50 press the cross-shaped element 41 and the lug structure 22 evenly.

[0039] In one embodiment, flange 20 is provided with an internal spline, and the output shaft 10 near the end of flange 20 is provided with an external spline, with the internal and external splines matched. Spline connections transmit torque through the meshing of multiple teeth. Compared to single-key connections, this provides a larger contact area, distributing the load evenly across each tooth, effectively reducing the force per unit area and minimizing the risk of tooth surface wear and deformation. The precise matching of the tooth profiles of the internal and external splines strictly limits the relative rotation between flange 20 and output shaft 10, ensuring synchronized movement during transmission.

[0040] In one embodiment, the outer peripheral surface of the flange 20 is also provided with at least two fourth through grooves 23, and the at least two fourth through grooves 23 are provided in a one-to-one correspondence with at least two channel structures 21. Each fourth through groove 23 is located between at least two first through grooves 212 of each channel structure 21. The length of the fourth through groove 23 extends along the axial direction of the flange 20, and the depth of the fourth through groove 23 extends along the radial direction of the flange 20. The fourth through groove 23 is connected to the channel structure 21 and connected to the through hole of the internal spline.

[0041] from Figure 2 It can be seen that the groove depth of the fourth through groove 23 extends from the end of the inner spline of the flange 20 to the outer surface of the flange 20, so that the flange 20 can be deformed to a certain extent during the bolt 31 tightening process, so that the inner spline and the spline of the output shaft 10 are fully engaged, thereby strengthening the connection strength.

[0042] In one embodiment, the internal spline is an involute spline or a rectangular spline. The meshing of involute teeth is a line contact, and rolling friction occurs between the tooth surfaces during torque transmission, reducing wear and improving transmission efficiency. Rectangular splines have a simple tooth profile and are relatively easy to manufacture, reducing manufacturing costs. Furthermore, the spline surface undergoes high-frequency quenching to improve its surface hardness and wear resistance.

[0043] According to an embodiment of the present invention, another aspect is provided: an excavator loader including the transmission device described in the above embodiment.

[0044] By setting a fastener 30 between the output shaft 10 and the flange 20, with one end of the flange 20 located on the outer ring of the output shaft 10, and operating the fastener 30, the fastener 30 can be configured to have a locked state that locks the output shaft 10 and the flange 20 together, and a released state that unlocks the flange 20 and the output shaft 10. This improves the reliability and stability of the connection between the output shaft 10 and the flange 20, reduces the failure rate, and solves the problem of poor reliability and high failure rate of the flange fixing method on the gearbox in the prior art.

[0045] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0046] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0047] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A transmission device, characterized in that, include: An output shaft (10), one end of which is used to connect to a gearbox; Flange (20), the other end of the output shaft (10) is connected to the flange (20); Fastener (30) is located between the flange (20) and the output shaft (10), the fastener (30) having a locked state that locks the flange (20) and the output shaft (10), and the fastener (30) having a released state that unlocks the flange (20) and the output shaft (10); The output shaft (10) is provided with an arc-shaped groove (11) arranged along the circumference of the output shaft (10), and the flange (20) is provided with at least two channel structures (21) arranged symmetrically along the radial direction of the flange (20). When the fastener (30) is in the locked state, at least two of the fasteners (30) are respectively located in at least two of the channel structures (21), and at least two of the fasteners (30) are engaged at opposite ends of the arc groove (11); The channel structure (21) includes a first channel structure and a second channel structure, both of which include: At least two notch structures (211) are provided on the outer surface of the flange (20), and the at least two notch structures (211) are arranged symmetrically along the radial direction of the flange (20); At least two first through slots (212), each of the notch structures (211) is provided with a first through slot (212), the center lines of the at least two first through slots (212) are arranged to coincide, and the at least two first through slots (212) form a channel for the fastener (30) to pass through.

2. The transmission device according to claim 1, characterized in that, The fastener (30) is at least two.

3. The transmission device according to claim 1, characterized in that, The distance between the center of the first channel structure and the center of the second channel structure is a, and the diameter of the arc groove (11) is b, where a > b.

4. The transmission device according to claim 1, characterized in that, The transmission device also includes: A drive shaft (40) is connected to the end of the flange (20) away from the output shaft (10). The end of the drive shaft (40) connected to the flange (20) is provided with a ten-way connector (41). The end of the flange (20) facing the drive shaft (40) is provided with a relief groove to avoid the ten-way connector (41). The end of the flange (20) away from the output shaft (10) is provided with a lug structure (22). A pressure plate (50) is provided on one side of the ten-way connector (41). The pressure plate (50) presses the ten-way connector (41) and the lug structure (22) together.

5. The transmission device according to claim 4, characterized in that, The lug structure (22) is provided with a second through groove (221), and the pressure plate (50) is provided with a third through groove (51). The second through groove (221) and the third through groove (51) are positioned correspondingly. The pressure plate (50) and the lug structure (22) are connected to the third through groove (51) and the second through groove (221) by a fastener (60).

6. The transmission device according to claim 1, characterized in that, The flange (20) is provided with an internal spline, and the output shaft (10) is provided with an external spline at one end near the flange (20). The internal spline and the external spline are matched.

7. The transmission device according to claim 6, characterized in that, The outer peripheral surface of the flange (20) is also provided with at least two fourth through grooves (23). The at least two fourth through grooves (23) are provided in a one-to-one correspondence with at least two channel structures (21). Each fourth through groove (23) is located between at least two first through grooves (212) of each channel structure (21). The length of the fourth through groove (23) extends along the axial direction of the flange (20), and the depth of the fourth through groove (23) extends along the radial direction of the flange (20). The fourth through groove (23) is connected to the channel structure (21) and connected to the through hole of the internal spline.

8. An excavator loader, characterized in that, The transmission device includes any one of claims 1-7.

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