Heavy drive axle structure for automatic guided vehicle of port

Abstract

The utility model relates to a heavy drive axle structure for an automatic guided vehicle of a port. The heavy drive axle structure is characterized by comprising an input module, a differential mechanism, a steering module, a wet brake, a wheel side planet module, a supporting beam, a universal coupling and a pressure-resistant oil seal structure, according to the heavy drive axle structure, the heavy load working condition (65t load, the maximum 70t load), the impact working condition and the climbing working condition (the gradient is 5%) can be realized; the requirement for the large steering angle of the AGV (the maximum steering angle is 35 degrees) is met; the vehicle speed can reach 22-25 Km / h; a running and parking integrated wet type hydraulic brake is arranged; the pressure-resistant oil seal is selected, and the internal high-pressure working condition is met; and the working capability and efficiency of the AGV are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of port transport vehicles, in particular to a heavy-duty drive axle structure for an automatic guided vehicle in a port. Background Art

[0002] In recent years, with the rapid development of technologies such as communication technology and automatic navigation, and in order to improve the efficiency of port operations, higher requirements have also been put forward for the horizontal transport equipment AGV in automated terminals, making the capabilities of conventional port AGV drive axles unable to meet the needs of technological development. The main manifestations are as follows:

[0003] 1. The load capacity of conventional AGV drive axles is insufficient, especially unable to withstand impacts, climbing and other working conditions for a long time, affecting the operation ability of the entire port. At present, the more common solution is to operate at a reduced speed, which affects the transport efficiency.

[0004] 2. The steering angle of conventional AGV drive axles is relatively small, increasing the turning radius during the operation of AGVs, and thus affecting the overall lane layout of the port.

[0005] 3. The running speed of conventional AGV drive axles is relatively slow, resulting in a long one-way carrying time. The current solution is to increase the number of AGVs to make up for the time efficiency. At the same time, it also brings problems such as complex overall control and logic algorithms due to too many AGV vehicles, and it is easy to have program errors.

[0006] 4. At present, most AGVs use dry or mechanical brakes. Such brakes have limited braking ability and are prone to heat generation. Moreover, the internal braking components wear greatly, are prone to oil leakage, and have a short replacement cycle.

[0007] 5. There is a high-pressure area inside the drive axle (compared with the transmission part), and the internal oil seals are prone to failure and leakage, affecting the operation of the overall axle.

[0008] The above factors restrict the operation efficiency of AGVs and do not match the current intelligent development. Content of the Utility Model

[0009] The technical problem to be solved by the utility model is to provide a heavy-duty drive axle structure for an automatic guided vehicle in a port, which can solve the problem that general automatic guided vehicles in ports cannot meet the use requirements.

[0010] To solve the above technical problem, the technical solution of the utility model is: a heavy-duty drive axle structure for an automatic guided vehicle in a port, the innovation of which lies in: including an input module, a differential, a steering module, a wet brake, a wheel-side planetary module, a support beam, a universal coupling and a pressure-resistant oil seal structure;

[0011] The input module is mounted on the support beam. The input module is a hyperbola spiral bevel gear driven by a power source. The output end of the input module transmits motion to the left and right wheel-side planetary module structures through a differential. The wheel-side planetary modules drive the wheel hubs to achieve motion. A universal joint is provided between the motion transmission output end of the input module and the left and right wheel hubs.

[0012] The steering module is installed on the support beam. The steering module consists of a hydraulic cylinder, a steering knuckle, a steering control rod, and a steering tie rod, forming a four-bar structure. Through drawing and simulation calculations, the geometric parameters of each component in the four-bar structure are continuously adjusted to achieve the technical requirements of a large steering angle.

[0013] The wet brake is installed on the left and right wheels to brake the left and right wheels;

[0014] The pressure-resistant oil seal structure is arranged in the cavity between the wet brake and the wheel-side planetary module, and the wet brake and the wheel-side planetary module are spatially isolated by the pressure-resistant oil seal structure.

[0015] Furthermore, the steering knuckle is mounted on a steering rod through a slewing module, and a pin hole for assembling with the steering knuckle is provided on the steering rod near the end, perpendicular to the axial direction; the slewing module includes an end cover, a steering bearing, an adjustment anti-wear washer and a pin; the steering knuckle has a U-shaped open end, and the U-shaped open end is nested on the end of the steering rod, and the U-shaped open end of the steering knuckle is connected to the steering rod through a pin; the steering bearing is nested on the pin and connected to the steering knuckle; the adjustment anti-wear washer is nested on the pin and padded between the steering rod and the steering knuckle; the end cover is buckled at the end of the pin.

[0016] Furthermore, the pressure-resistant oil seal structure is a left-side oil seal pressure-resistant structure, and the distance from the oil seal lip to the oil seal end face is shortened on the oil seal structure to reduce the force arm, enhance the stiffness of the lip part, and improve the oil seal pressure resistance and anti-flagging ability; or, the pressure-resistant oil seal structure is a back-to-back arrangement structure, using an ordinary oil seal, with a retaining ring installed in the middle to support the oil seal lip on the structure to enhance local stiffness and improve pressure resistance.

[0017] The advantages of the present invention are:

[0018] 1) The heavy-duty drive axle structure of this utility model can handle heavy-load conditions (65t load, maximum 70t load), impact conditions, and climbing conditions (slope 5%); it meets the AGV's large steering angle requirements (maximum 35°) and achieves a vehicle speed of 22-25km / h. It is equipped with integrated wet hydraulic brakes for both travel and parking, and uses pressure-resistant oil seals to meet internal high-pressure conditions, effectively improving the AGV's operating capacity and efficiency.

[0019] 2) The heavy-duty drive axle transmission system in the present utility model consists of a hypoid spiral bevel gear + wheel-side planetary structure; the hypoid spiral bevel gear can effectively ensure the requirements of smooth transmission, and can achieve the offset function of the offset gear, making full use of the vehicle body space structure; the wheel-side drive uses a planetary structure and adopts a multi-planetary wheel configuration, which can significantly improve the load-bearing capacity of the wheel-side structure while achieving smooth and efficient transmission, meeting the requirements of special working conditions; the AGV heavy-duty drive axle adopts an integrated running and parking wet brake; on the premise of ensuring sufficient braking capacity, the volume is reduced; and according to different functional requirements, brakes with different control forms and braking functions can be selected and configured; under the condition of not increasing the size and material of the oil seal structure, a special oil seal structure is selected to effectively improve the oil seal's pressure resistance and anti-deformation ability, and improve the reliability of the oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0021] Figure 1 It is a schematic diagram of the structural principle of a heavy-duty drive axle for an automatic guided vehicle at a port according to the present utility model.

[0022] Figure 2 It is a schematic diagram of the steering module of the structure of a heavy-duty drive axle for an automatic guided vehicle at a port according to the present utility model.

[0023] Figure 3 It is a schematic diagram of the assembly of the steering joint of the structure of a heavy-duty drive axle for an automatic guided vehicle at a port according to the present utility model.

[0024] Figure 4 It is the first schematic diagram of the pressure-resistant oil seal structure of the structure of a heavy-duty drive axle for an automatic guided vehicle at a port according to the present utility model.

[0025] Figure 5 It is the second schematic diagram of the pressure-resistant oil seal structure of the structure of a heavy-duty drive axle for an automatic guided vehicle at a port according to the present utility model. SPECIFIC EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0028] As Figures 1 to 5 shown, a heavy-duty drive axle structure for a port automatic guided vehicle includes an input module 1, a differential 2, a steering module 3, a wet brake 4, a wheel-side planetary module 5, a support beam 6, a universal coupling 7, and a pressure-resistant oil seal structure 8.

[0029] The input module 1 is installed on the support beam 6. The input module 1 is a hyperbolic spiral bevel gear driven by a power source, and the output end of the input module 1 transmits motion to the left and right wheel-side planetary module structures 5 through the differential 2. The wheel-side planetary module 5 drives the hub to achieve motion, and a universal coupling 7 is provided between the motion transmission output end of the input module 1 and the left and right hubs.

[0030] The steering module 3 is installed on the support beam 6. The steering module 3 is composed of a hydraulic cylinder 31, a steering joint 32, a steering control rod 33, and a steering tie rod 34, forming a four-bar linkage structure; through drawing and simulation calculation, the geometric parameters of each component in the four-bar linkage structure are continuously adjusted to meet the technical requirements of a large steering angle.

[0031] The wet brake 4 is installed at the left and right wheel sides to brake the left and right wheel sides.

[0032] The pressure-resistant oil seal structure 8 is arranged in the cavity between the wet brake 4 and the wheel-side planetary module 5, and the wet brake and the wheel-side planetary module are absolutely isolated in space through the pressure-resistant oil seal structure 8.

[0033] The steering joint is installed on a steering rod through a slewing module 9, and a pin shaft hole for assembling with the steering joint 32 is arranged perpendicular to the axis direction at a position near the end of the steering rod; the slewing module 9 includes an end cover 91, a steering bearing 92, an adjusting anti-wear washer 93, and a pin shaft 94; the steering joint 32 has a U-shaped open end, and the U-shaped open end is nested on the end of the steering rod. The U-shaped open end of the steering joint 32 is connected to the steering rod through the pin shaft 94; the steering bearing is nested on the pin shaft and connected to the steering joint; the adjusting anti-wear washer is nested on the pin shaft and padded between the steering rod and the steering joint; the end cover covers the end of the pin shaft.

[0034] The pressure-resistant oil seal structure 8 is a left-side oil seal pressure-resistant structure, in which the distance from the oil seal lip to the oil seal end face is shortened to reduce the lever arm, enhance the stiffness of the lip portion, and improve the oil seal's pressure resistance and anti-flagging capabilities; or, the pressure-resistant oil seal structure 8 is a back-to-back arrangement structure, utilizing an ordinary oil seal with a retaining ring installed in the middle to support the oil seal lip on the structure, in order to enhance local stiffness and improve pressure resistance.

[0035] The working principle of the utility model is as follows: the heavy-duty drive axle transmission system is composed of a hyperbolic spiral bevel gear + a wheel-side planetary structure; the hyperbolic spiral bevel gear can effectively ensure the transmission stability requirement, and can realize the offset gear offset function, and can make full use of the vehicle body space structure; the wheel-side transmission uses a planetary structure and adopts a multi-planetary gear configuration, which can significantly improve the bearing capacity of the wheel-side structure while achieving smooth and efficient transmission, and meet the requirements of special working conditions; the AGV heavy-duty drive axle adopts an integrated wet brake for traveling and parking; while ensuring sufficient braking capacity, the volume is reduced; and according to different functional requirements, brake structures with different control forms and braking functions can be selected; without increasing the size and material of the oil seal structure, a special oil seal structure is selected to effectively improve the oil seal's pressure resistance and anti-deformation capabilities, and improve the reliability of the oil seal.

[0036] Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements shall fall within the scope of the present invention to be protected.

Claims

1. A heavy-duty drive axle structure for an automated guided vehicle in a port, characterized in that: It includes input module, differential, steering module, wet brake, wheel side planetary module, support beam, universal joint and pressure oil seal structure; The input module is mounted on the support beam. The input module is a hyperbola spiral bevel gear driven by a power source. The output end of the input module transmits motion to the left and right wheel-side planetary module structures through a differential. The wheel-side planetary modules drive the wheel hubs to achieve motion. A universal joint is provided between the motion transmission output end of the input module and the left and right wheel hubs. The steering module is installed on the support beam, and the steering module is composed of a hydraulic cylinder, a steering joint, a steering control rod, and a steering tie rod to form a four-link structure; The wet brake is installed on the left and right wheels to brake the left and right wheels; The pressure-resistant oil seal structure is arranged in the cavity between the wet brake and the wheel-side planetary module, and the wet brake and the wheel-side planetary module are spatially isolated by the pressure-resistant oil seal structure.

2. The structure of a heavy-duty drive axle for a port automatic guided vehicle according to claim 1, wherein: The steering knuckle is mounted on a steering rod through a slewing module, and a pin hole for assembling with the steering knuckle is provided on the steering rod near the end, perpendicular to the axial direction; the slewing module includes an end cover, a steering bearing, an adjustment anti-wear washer and a pin; the steering knuckle has a U-shaped open end, and the U-shaped open end is nested on the end of the steering rod, and the U-shaped open end of the steering knuckle is connected to the steering rod through a pin; the steering bearing is nested on the pin and connected to the steering knuckle; the adjustment anti-wear washer is nested on the pin and padded between the steering rod and the steering knuckle; the end cover is buckled at the end of the pin.

3. The structure of a heavy-duty drive axle for a port automatic guided vehicle according to claim 1, wherein: The pressure-resistant oil seal structure is a left-side oil seal pressure-resistant structure, in which the distance from the oil seal lip to the oil seal end face is shortened to reduce the lever arm, enhance the stiffness of the lip portion, and improve the oil seal's pressure resistance and anti-flagging capabilities; or, the pressure-resistant oil seal structure is a back-to-back arrangement structure, utilizing an ordinary oil seal with a retaining ring installed in the middle to support the oil seal lip on the structure, in order to enhance local stiffness and improve pressure resistance.

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