Heavy load forklift drive axle housing with anti-vibration structure

Abstract

The application relates to the technical field of forklift axle housings, in particular to a heavy-load forklift drive axle housing with an anti-vibration structure, which comprises an outer convex axle housing, a flange plate, a spline shaft, an output shaft, a speed change assembly and an anti-vibration assembly. The flange plate is installed on the outer side of the outer convex axle housing, the spline shaft is sleeved on the inner side of the flange plate, and the spline shaft is connected with the central shaft of a wheel at the end far from the flange plate. The heavy-load forklift drive axle housing with the anti-vibration structure can automatically transfer more power to the wheel with better adhesion when one wheel slips, so that the defect that a large amount of power is lost in the slipping wheel is avoided; the anti-vibration assembly arranged between the axle housing and the vehicle frame can significantly absorb and attenuate the impact and vibration from the road surface, the problem that the service life of elements is reduced due to the direct transmission of the impact and vibration of the transmission device is solved, and the overall service life of the drive axle is prolonged.

Description

Technical Field

[0001] This application relates to the field of forklift axle housing technology, and in particular to a heavy-duty forklift drive axle housing with an anti-vibration structure. Background Technology

[0002] Forklifts are industrial handling vehicles, referring to various wheeled handling vehicles used for loading, unloading, stacking, and short-distance transportation of palletized goods. They are commonly used for transporting large items in warehouses and are usually powered by fuel engines or batteries. The function of the forklift drive axle is to transmit power to the drive wheels, enabling the forklift to move.

[0003] Traditional drive axles typically employ open differentials with a single planetary gear set or bevel gear set. While these differentials provide basic differential functionality, under heavy loads and harsh conditions, when one drive wheel slips, a significant amount of power is lost to the slipping wheel, resulting in a severe decrease in vehicle traction and even impaired ability to escape difficult situations. This is a fatal flaw for heavy-duty forklifts that require high reliability and strong power. Furthermore, traditional open differentials lack the ability to actively limit the speed of the left and right wheels. They respond entirely passively to road resistance and cannot effectively suppress wheel speed differences caused by minor road surface variations when the vehicle is traveling in a straight line. This can affect driving stability and increase tire wear. The drive axle housing is rigidly or simply bushed to the frame. This structure directly transmits most of the impacts and vibrations from the road surface to the precision gears, bearings, and the frame itself inside the drive axle. Over the long term, this not only severely impacts driver comfort but also significantly reduces the lifespan of components within the drive axle. Utility Model Content

[0004] This application provides a heavy-duty forklift drive axle housing with a shock-resistant structure to address the following technical problem: the drive axle housing is rigidly or simply bushed to the frame, which directly transmits most of the impact and vibration from the road surface to the precision gears, bearings, and the frame itself inside the drive axle. Over time, this not only severely affects driver comfort but also significantly reduces the lifespan of the components within the drive axle.

[0005] This application provides a heavy-duty forklift drive axle housing with a shock-resistant structure, employing the following technical solution:

[0006] A heavy-duty forklift drive axle housing with a vibration-resistant structure includes an outward-convex axle housing, a flange, a splined shaft, an output shaft, a transmission assembly, and a vibration-resistant assembly. The flange is installed on the outside of the outward-convex axle housing, the splined shaft is sleeved on the inside of the flange, and one end of the splined shaft away from the flange is engaged with the central shaft of the wheel. The output shaft is rotatably connected to the other side of the outward-convex axle housing, the transmission assembly is installed inside the outward-convex axle housing, and the vibration-resistant assembly is installed on the outside of the protruding end of the outward-convex axle housing.

[0007] In one feasible technical solution of this application, the transmission assembly includes a transverse shaft, a hollow main wheel, an embedded turntable, a convex plate, a driving bevel gear, and a driven wheel. The transverse shaft is fixedly connected to one end of the spline shaft, and the transverse shaft on the other side is rotatably connected to the middle of the hollow main wheel. The outer side of the hollow main wheel is rotatably connected to the inner side of the embedded turntable. The outer side of the embedded turntable is fixedly connected to the surface of the convex plate. The top of the convex plate is rotatably connected to the top of the driving bevel gear. The outer teeth of the driving bevel gear mesh with the driven wheel. The middle parts of the driven wheel are fixedly connected to the opposite side surfaces of the transverse shaft.

[0008] In one feasible technical solution of this application, the anti-seismic component includes a galvanized steel cover, a chromium-molybdenum alloy steel spring, a damping rod, a guide plate, and a support plate. The galvanized steel cover is connected to the convex axle housing and the vehicle floor surface. The two sides of the chromium-molybdenum alloy steel spring are fixedly connected to the opposite side surfaces of the galvanized steel cover. The damping rod is sleeved on the inner side of the chromium-molybdenum alloy steel spring. The guide plate is fixedly connected to the two sides of the galvanized steel cover. The support plate is fixedly connected to the outer side of the protruding end of the convex axle housing, and the inner surface of the support plate is slidably connected to the surface of the guide plate.

[0009] In one feasible technical solution of this application, the interior of the raised platform is provided with several sets of limiting grooves that are adapted to the size of the guide support plate.

[0010] In one feasible technical solution of this application, a transmission wheel is also provided at one end of the output shaft located inside the convex bridge housing, and the external teeth of the transmission wheel mesh with the hollow main wheel disc.

[0011] In one feasible technical solution of this application, the damping rods are provided in several groups, and the several groups of damping rods are symmetrically arranged on both sides of the convex bridge housing.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] This device utilizes the meshing of multiple gears to automatically transfer more power to the wheel with better traction when one wheel slips, avoiding significant power loss on the slipping wheel and ensuring strong traction and off-road capability under heavy loads. The internal locking effect of this gear system actively suppresses the speed difference between the left and right wheels caused by minor road surface unevenness during straight-line driving, effectively improving vehicle stability and reducing abnormal tire wear. Through anti-vibration components positioned between the axle housing and the frame, this device significantly absorbs and attenuates impacts and vibrations from the road surface, preventing direct transmission to precision gears, bearings, and other components inside the convex axle housing. This solves the problem of reduced component lifespan caused by direct transmission of impact vibrations, extending the overall service life of the drive axle. Simultaneously, vibrations transmitted to the frame and cab are significantly reduced, significantly improving driver comfort and reducing fatigue during long-term operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a heavy-duty forklift drive axle housing with an anti-vibration structure according to an embodiment of this application.

[0016] Figure 2 This is a top view of the distribution of the spline shaft and output shaft in an embodiment of this application.

[0017] Figure 3 This is a cross-sectional view of the convex bridge housing in an embodiment of this application.

[0018] Figure 4 This is a schematic diagram of the transmission component in the embodiments of this application.

[0019] Figure 5 This is a schematic diagram of the structure of the anti-seismic component in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Externally projecting bridge housing; 2. Flange; 3. Splined shaft; 4. Output shaft;

[0022] 5. Transmission assembly; 51. Lateral shaft; 52. Hollow main wheel; 53. Embedded turntable; 54. Convex plate; 55. Driving bevel gear; 56. Driven wheel;

[0023] 6. Seismic resistant components; 61. Galvanized steel cover; 62. Chromium-molybdenum alloy steel spring; 63. Damping rod; 64. Guide support plate; 65. Elevation plate;

[0024] 7. Limiting groove; 8. Transmission wheel. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses a heavy-duty forklift drive axle housing with an anti-vibration structure. (Refer to...) Figures 1 to 5 The heavy-duty forklift drive axle housing with anti-vibration structure includes an externally projecting axle housing 1, a flange 2, a splined shaft 3, an output shaft 4, a transmission assembly 5, and an anti-vibration assembly 6. The flange 2 is installed on the outside of the externally projecting axle housing 1, the splined shaft 3 is sleeved on the inside of the flange 2, and the end of the splined shaft 3 away from the flange 2 is engaged with the central shaft of the wheel. The output shaft 4 is rotatably connected to the other side of the externally projecting axle housing 1. The transmission assembly 5 is installed inside the externally projecting axle housing 1, and the anti-vibration assembly 6 is installed on the outside of the protruding end of the externally projecting axle housing 1.

[0031] The transmission assembly 5 includes a transverse shaft 51, a hollow main wheel 52, an embedded turntable 53, a convex plate 54, a driving bevel gear 55, and a driven wheel 56. The transverse shaft 51 is fixedly connected to one end of the spline shaft 3, and the transverse shaft 51 on the other side is rotatably connected to the middle of the hollow main wheel 52. The outer side of the hollow main wheel 52 is rotatably connected to the inner side of the embedded turntable 53. The outer side of the embedded turntable 53 is fixedly connected to the surface of the convex plate 54. The top of the convex plate 54 is rotatably connected to the top of the driving bevel gear 55. The outer teeth of the driving bevel gear 55 mesh with the driven wheel 56. The middle part of the driven wheel 56 is fixedly connected to the opposite side surface of the transverse shaft 51.

[0032] Power is transmitted from the hollow main wheel 52 through the embedded turntable 53 and the convex plate 54, and finally evenly to the splined shafts 3 on both sides via the transverse shaft 51, thereby driving the wheels. At this time, there is no significant relative rotation between the driving bevel gear 55 and the driven wheel 56, and the system exhibits high rigidity transmission characteristics, effectively suppressing unnecessary wheel speed differences and ensuring the stability of straight-line driving.

[0033] The seismic-resistant component 6 includes a galvanized steel cover 61, a chromium-molybdenum alloy steel spring 62, a damping rod 63, a guide plate 64, and a support plate 65. The galvanized steel cover 61 is connected to the surface of the vehicle floor through the convex axle housing 1. The two sides of the chromium-molybdenum alloy steel spring 62 are fixedly connected to the opposite side surfaces of the galvanized steel cover 61. The damping rod 63 is sleeved on the inner side of the chromium-molybdenum alloy steel spring 62. The guide plate 64 is fixedly connected to the two sides of the galvanized steel cover 61. The support plate 65 is fixedly connected to the outer side of the convex end of the convex axle housing 1, and the inner surface of the support plate 65 is slidably connected to the surface of the guide plate 64.

[0034] The impact force is transmitted to the interior of the component through the galvanized steel cover 61. The chromium-molybdenum alloy steel spring 62, as the main load-bearing and buffering element, first undergoes elastic deformation to absorb and store most of the impact energy; at the same time, the damping rod 63 sleeved inside it provides motion resistance, quickly attenuating the reciprocating vibration of the spring and transforming the violent impact into smooth damping.

[0035] The interior of the raised platform 65 is provided with several sets of guide support plates 64 with corresponding limiting grooves 7.

[0036] The output shaft 4 is located inside the convex bridge housing 1 and is equipped with a transmission wheel 8. The external teeth of the transmission wheel 8 mesh with the hollow main wheel 52.

[0037] This speed difference forces the driving bevel gear 55 to rotate on its own axis in addition to its revolution around the sun. Through its meshing with the driven wheels 56 on both sides, it automatically adjusts the torque distributed to the left and right lateral shafts 51. This mechanism effectively limits the power spinning of the wheel on the slipping side, ensuring that most of the torque is continuously transmitted to the side with good traction, achieving excellent automatic limited-slip differential function and significantly improving the vehicle's passability and traction.

[0038] Several sets of damping rods 63 are provided, and the several sets of damping rods 63 are symmetrically arranged on both sides of the convex bridge housing 1.

[0039] The usage process of the heavy-duty forklift drive axle housing with anti-vibration structure in this embodiment of the application is roughly as follows:

[0040] Power is first input to the drive axle through the output shaft 4. The transmission wheel 8 at the end of the output shaft 4 rotates accordingly, transmitting power to the hollow main wheel 52 in the gearbox assembly 5. The hollow main wheel 52 drives the embedded turntable 53 to rotate through its outer side. The embedded turntable 53 then drives the convex plate 54 and the active bevel gear 55 mounted on it to revolve. When the vehicle is traveling in a straight line, the resistance of the wheels on both sides is basically equal. The above-mentioned assembly rotates as a whole, and the power is smoothly transmitted to the splined shafts 3 on both sides through the transverse shaft 51, ultimately driving the wheels. When the vehicle turns or one wheel encounters resistance, a speed difference is generated between the left and right wheels, forcing the active bevel gear 55 to rotate on its own axis while revolving. Through meshing with the driven wheels 56 on both sides, the torque distributed to the left and right transverse shafts 51 is automatically adjusted to achieve intelligent limited-slip differential and ensure effective traction output.

[0041] When the drive axle is impacted by the road surface, the galvanized steel cover 61, connected to the undercarriage, transmits the force to the shock-absorbing component 6. The chromium-molybdenum alloy steel spring 62, as the main elastic element, is first compressed, absorbing most of the impact energy; simultaneously, the damping rod 63, sleeved inside it, provides resistance to movement, quickly suppressing and attenuating the reciprocating vibration of the spring. During the shock absorption process, the guide plates 64, fixed to both sides of the galvanized steel cover 61, slide inside the support plate 65 fixed to the convex axle housing 1. The limiting groove 7 on the support plate 65 ensures that the guide plates 64 can only move vertically along a preset trajectory, effectively preventing the entire axle housing from lateral swaying or twisting during the shock absorption process, and ensuring the connection stability and operational reliability of the internal transmission components.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heavy-duty forklift drive axle housing with an anti-vibration structure, characterized in that, The axle housing includes an externally projecting axle housing (1), a flange (2), a splined shaft (3), an output shaft (4), a transmission assembly (5), and a shock-absorbing assembly (6). The flange (2) is installed on the outside of the externally projecting axle housing (1). The splined shaft (3) is sleeved on the inside of the flange (2), and the end of the splined shaft (3) away from the flange (2) is engaged with the central shaft of the wheel. The output shaft (4) is rotatably connected to the other side of the externally projecting axle housing (1). The transmission assembly (5) is installed inside the externally projecting axle housing (1), and the shock-absorbing assembly (6) is installed on the outside of the protruding end of the externally projecting axle housing (1).

2. The heavy-duty forklift drive axle housing with anti-seismic structure according to claim 1, characterized in that, The transmission assembly (5) includes a transverse shaft (51), a hollow main wheel (52), an embedded turntable (53), a convex plate (54), a driving bevel gear (55), and a driven wheel (56). The transverse shaft (51) is fixedly connected to one end of the spline shaft (3), and the transverse shaft (51) on the other side is rotatably connected to the middle part of the hollow main wheel (52). The outer side of the hollow main wheel (52) is rotatably connected to the inner side of the embedded turntable (53). The outer side of the embedded turntable (53) is fixedly connected to the surface of the convex plate (54). The top of the convex plate (54) is rotatably connected to the top of the driving bevel gear (55). The outer teeth of the driving bevel gear (55) mesh with the driven wheel (56). The middle part of the driven wheel (56) is fixedly connected to the opposite side surface of the transverse shaft (51).

3. The heavy-duty forklift drive axle housing with anti-seismic structure according to claim 1, characterized in that, The anti-seismic component (6) includes a galvanized steel cover (61), a chromium-molybdenum alloy steel spring (62), a damping rod (63), a guide plate (64), and a raised plate (65). The galvanized steel cover (61) is connected to the convex axle housing (1) and the vehicle floor surface. The two sides of the chromium-molybdenum alloy steel spring (62) are fixedly connected to the opposite side surfaces of the galvanized steel cover (61). The damping rod (63) is sleeved on the inner side of the chromium-molybdenum alloy steel spring (62). The guide plate (64) is fixedly connected to the two sides of the galvanized steel cover (61). The raised plate (65) is fixedly connected to the outer side of the protruding end of the convex axle housing (1), and the inner surface of the raised plate (65) is slidably connected to the surface of the guide plate (64).

4. The heavy-duty forklift drive axle housing with anti-seismic structure according to claim 3, characterized in that, The raised platform (65) has several sets of limiting grooves (7) with sizes adapted to the guide support plates (64) through it.

5. The heavy-duty forklift drive axle housing with an anti-seismic structure according to claim 2, characterized in that, The output shaft (4) is located inside the convex bridge housing (1) and a transmission wheel (8) is provided at one end. The external teeth of the transmission wheel (8) mesh with the hollow main wheel disc (52).

6. The heavy-duty forklift drive axle housing with anti-vibration structure according to claim 3, characterized in that, The damping rods (63) are provided in several groups, and the several groups of damping rods (63) are symmetrically arranged on both sides of the convex bridge shell (1).

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