Automatic transfer wheel axle structure

Abstract

The utility model provides an automatic transfer wheel axle structure which comprises a main beam, a hinged support and rotating mechanisms, the hinged support is detachably connected to a frame chassis of a transfer trolley, the middle of the main beam is correspondingly hinged to the upper portion of the hinged support, and the two ends of the main beam are connected with two driving wheels through the rotating mechanisms respectively. The fixed gear is fixedly connected to the lower surface of the main beam; the turntable is rotationally connected with the fixed gear through a rotating shaft, a mounting station extends out of the side part of the turntable, the mounting station is rotationally connected with a movable gear meshed with the fixed gear, and the movable gear is correspondingly connected with a first driving motor to drive the turntable to rotate relative to the fixed gear; the wheel seat is of an inverted-U-shaped structure fixed to the lower surface of the rotary disc, the driving wheel is rotationally connected into the wheel seat, and a second driving motor correspondingly connected with the driving wheel is arranged on the side portion of the wheel seat. The rotating mechanism is driven through gears, so that steering mechanisms such as connecting rods do not need to be installed, the occupied space of steering equipment is greatly reduced, and the internal space of the transfer trolley can be optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of AGV automatic transfer vehicles, and particularly relates to a wheel bridge structure of an automatic transfer vehicle. Background Art

[0002] AGV transfer vehicles are mostly used in fields such as assembly and logistics. The AGV transfer vehicle generally sets a steering mechanism at the front wheels or the rear wheels to achieve steering. The steering mechanism generally requires a relatively large space. However, the chassis of the traditional AGV vehicle is often limited by a relatively large space size, and the installation difficulty of the steering equipment is relatively large. Therefore, it is necessary to improve the traditional steering mechanism.

[0003] Therefore, it is necessary to provide an improved technical solution for the deficiencies of the above-mentioned existing technologies. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the above-mentioned existing technologies. The utility model provides a wheel bridge structure of an automatic transfer vehicle.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A wheel bridge structure of an automatic transfer vehicle, the wheel bridge structure includes a main beam, a hinge support and a rotating mechanism. The hinge support is connected to the frame chassis of the transfer vehicle in a detachable manner. The middle part of the main beam is correspondingly hinged above the hinge support. Two driving wheels are respectively connected to both ends of the main beam through the rotating mechanism;

[0007] The rotating mechanism includes:

[0008] A fixed gear, the fixed gear is fixedly connected to the lower surface of the main beam;

[0009] A turntable, the turntable is rotatably connected to the fixed gear through a rotating shaft. An installation station extends out from the side of the turntable. A moving gear meshing with the fixed gear is rotatably connected to the installation station. The moving gear is correspondingly connected to a first driving motor to drive the turntable to rotate relative to the fixed gear;

[0010] A wheel seat, the wheel seat is an inverted U-shaped structure fixed to the lower surface of the turntable. The driving wheel is rotatably connected to the wheel seat. A second driving motor corresponding to the driving wheel is provided on the side of the wheel seat.

[0011] Preferably, the main beam is a plate-like structure. Circular connection ends are provided at both ends of the main beam. The fixed gear is concentrically assembled with the circular connection ends.

[0012] Preferably, the middle part of the main beam is hinged above the hinge support through a hinge shaft, so that the main beam can rotate around the hinge shaft. Installation openings corresponding to the two driving wheels are provided on both sides of the vehicle frame, and the driving wheels extend out of the bottom surface of the transporter after passing through the installation openings.

[0013] The two buffer members are respectively located at both ends of the main beam. One end of the buffer member abuts against the upper surface of the main beam, and the other end abuts upward against the vehicle frame of the transporter.

[0014] Preferably, a plurality of guide columns evenly distributed circumferentially about the wheel seat are provided below the turntable. A flange corresponding to the guide columns is fixed above the wheel seat. The flange and the turntable are concentrically distributed. The flange is slidably assembled longitudinally on the plurality of guide columns, and an elastic member is sleeved on the outer wall of the guide column.

[0015] Preferably, two rib plates are provided in parallel above the main beam.

[0016] Preferably, the buffer member is a spring. A positioning column is provided between the two rib plates above the main beam, and the lower end of the spring is correspondingly sleeved on the positioning column.

[0017] Preferably, ear plates extend downward on both sides of the hinge support. An articulated plate corresponding to the two ear plates is provided above the hinge support. The hinge shaft correspondingly passes through the ear plates and the articulated plate along the center line of the transporter to form an articulation.

[0018] Preferably, the vehicle frame is a square truss welded by square steel. Square protective frames corresponding to the wheel bridge structures are provided at both ends of the vehicle frame, and a retaining rod corresponding to the buffer member is provided on the square protective frame.

[0019] Beneficial effects: A rotating mechanism is provided. The rotating mechanism is driven by gears, so that there is no need to install steering mechanisms such as connecting rods, thereby greatly reducing the occupied space of the steering equipment and optimizing the internal space of the transporter.

[0020] An articulated wheel bridge is provided, and buffer members are provided at both ends of the wheel bridge. The wheel bridge can rotate on the transporter, so as to improve the seismic resistance of the AGV transporter during the traveling process. In addition, an elastic member is provided to connect the wheel seat, so that the driving wheel always has a downward driving force. When encountering a bumpy road surface, the reaction force of the driving member makes the driving wheel always keep close to the ground, and the ground also provides a supporting force for the driving wheel at all times to ensure sufficient adhesion, ensuring that the AGV will not lose power due to uneven road surfaces. Description of the Drawings

[0021] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. Among them:

[0022] Figure 1 Schematic diagram of the assembly of the wheel axle in the specific embodiment provided by the present utility model;

[0023] Figure 2 Schematic diagram of the structure of the wheel axle in the specific embodiment provided by the present utility model.

[0024] In the figure: 1, vehicle frame; 2, square protective frame; 3, mounting opening; 4, drive wheel; 5, gear lever; 6, main beam; 7, positioning column; 8, fixed gear; 9, turntable; 10, second drive motor; 11, moving gear; 12, first drive motor; 13, hinge support; 14, wheel seat. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0026] In the description of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model rather than requiring the present utility model to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. The terms "connected" and "connected" used in the present utility model should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] Next, the present utility model will be described in detail with reference to the drawings and in combination with the embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0028] As Figure 1-2 shown, an automatic transfer wheel axle structure, the wheel axle structure includes a main beam 6, a hinge support 13 and a rotating mechanism, extends along the width direction of the transfer vehicle, and the length is adapted to the width of the transfer vehicle. An installation station corresponding to the hinge support 13 is provided on the chassis of the vehicle frame 1 of the transfer vehicle. The hinge support 13 is connected to the vehicle frame 1 of the transfer vehicle in a detachable manner. The hinge support 13 is located at the midline of the transfer vehicle. The middle part of the main beam 6 is correspondingly hinged above the hinge support 13. At both ends of the main beam 6, two drive wheels 4 are respectively connected through the rotating mechanism, and the drive wheels 4 are used to drive the transfer vehicle.

[0029] The rotating mechanism includes a fixed gear 8, a turntable 9, and a wheel seat 14. The fixed gear 8 is fixedly connected to the lower surface of the main beam 6, and the two are fixed by bolts. The turntable 9 is rotatably connected to the fixed gear 8 through a rotating shaft. A central shaft is provided in the middle of the turntable 9, and the central shaft passes upward through the fixed gear 8 to form a rotating connection. A stop member is provided after the lower section of the central shaft passes through the turntable 9. An installation station extends from the side of the turntable 9. The installation station is integrally formed with the turntable 9. A moving gear 11 is rotatably connected to the installation station. The moving gear 11 meshes with the fixed gear 8. A first driving motor 12 is provided below the installation station. The moving gear 11 is correspondingly connected to the first driving motor 12 to drive the turntable 9 to rotate relative to the fixed gear 8, thereby realizing the steering of the wheel seat 14.

[0030] The wheel seat 14 is an inverted U-shaped structure fixed to the lower surface of the turntable 9. The driving wheel 4 is rotatably connected inside the wheel seat 14. The two ends of the main shaft of the driving wheel 4 are respectively rotatably connected to both sides of the wheel seat 14. A second driving motor 10 corresponding to the driving wheel 4 is provided on one side of the wheel seat 14 to provide driving force for the transporter.

[0031] In an alternative embodiment, the main beam 6 is a plate-like structure welded by steel plates. Circular connection ends are provided at both ends of the main beam 6. The fixed gear 8 is concentrically assembled with the circular connection ends to ensure the accuracy of rotation.

[0032] The upper part of the hinge support 13 is hinged to the middle of the main beam 6 through a hinge shaft, so that the main beam 6 can rotate around the hinge shaft, thereby improving the anti-tilting ability and anti-seismic ability of the transporter. Installation openings 3 corresponding to the two driving wheels 4 are provided on both sides of the vehicle frame 1. The driving wheels 4 pass through the installation openings 3 and extend out of the bottom surface of the transporter, so that the driving wheels 4 can support the transporter and ensure that the steering of the driving wheels 4 will not be interfered by the vehicle frame 1.

[0033] Two buffer members are respectively located at both ends of the main beam 6. The buffer members can be buffer springs. The buffer springs have high strength, so that they can support the transporter under normal conditions and prevent the main beam 6 from making hard contact with the transporter. One end of the buffer spring abuts against the upper surface of the main beam 6, and the other end abuts upward against the vehicle frame 1 of the transporter, thereby meeting the buffer requirements through the buffer springs.

[0034] The buffer is a buffer spring. There is a positioning column 7 located between two rib plates above the main beam 6. The lower end of the spring is correspondingly sleeved on the positioning column 7. The vehicle frame 1 is a square truss welded by square steel. At both ends of the vehicle frame 1, there are square protective frames 2 corresponding to the wheel bridge structure. The square protective frames 2 are located above the mounting holes. In the middle of the vehicle frame 1, a connecting rod corresponding to the middle part below the square protective frame 2 is provided for installing the hinge support 13 to form a movable space for the wheel bridge structure. A retaining rod 5 corresponding to the buffer is provided on the protective frame. A sleeve corresponding to the spring is provided on the retaining rod 5. In this embodiment, there is a certain gap between the lower edge of the sleeve and the positioning column 7. During the rotation of the main beam 6, the gap between the lower edge of the sleeve and the positioning column 7 is not greater than the length of the buffer spring, thus simplifying the installation structure of the buffer spring. By setting the square protective frame 2 on the vehicle frame 1, the chassis structure is optimized, thereby reducing the installation difficulty of the wheel bridge and reducing the weight of the vehicle body Zhongxin.

[0035] In an alternative embodiment, a plurality of guide columns evenly distributed circumferentially about the wheel seat 14 are provided below the turntable 9. The guide columns are metal columns extending vertically downward. A flange corresponding to the guide columns is fixed above the wheel seat 14. The flange is concentric with the turntable 9. Perforations corresponding to the guide columns are provided at the edge of the flange. The flange is slidably assembled longitudinally on the plurality of guide columns. An elastic member is sleeved on the outer wall of the guide column. The elastic member can be a compression spring. A stop flange is provided after the lower end of the guide column passes through the flange, thereby forming a shock-absorbing floating structure for the driving wheel 4, enabling the driving wheel 4 to have the freedom of vertical compression. When the driving wheel 4 protrudes outward, due to the self-weight of the AGV, the driving wheel 4 is pressed to be flush with the auxiliary wheel. Through the shock-absorbing floating structure, the problem of multiple wheels touching the ground together is realized. In addition to ensuring the driving force of the AGV, the contact of the auxiliary wheel with the ground also shares a part of the load. The spring in the shock-absorbing floating structure will keep the driving wheel 4 always in close contact with the ground. When encountering a raised road surface, due to the floating property of the driving unit and the compressibility of the spring, it can be avoided that the driving unit drives the entire AGV to be lifted. The reaction force of the spring keeps the driving wheel 4 always in close contact with the ground, and the ground also provides a supporting force for the driving wheel 4 at all times to ensure sufficient adhesion, ensuring that the AGV will not lose power due to uneven road surfaces.

[0036] In an alternative embodiment, two rib plates are provided in parallel above the main beam 6. Thereby strengthening the strength of the main beam 6. Ear plates extend downward on both sides of the hinge support 13. An articulated plate corresponding to the two ear plates is provided above the hinge support 13. The hinge shaft passes through the ear plates and the articulated plate along the center line of the transporter to form an articulation.

[0037] Furthermore, a strip-shaped hole corresponding to the hinge shaft and extending longitudinally is provided on the articulated plate, thereby improving the seismic resistance effect. During actual use, the main beam 6 can move up and down along the strip-shaped hole according to the actual load, so that the weight of the transporter is borne by the spring.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model are within the scope of protection of the pending claims of the present utility model.

Claims

1. An automatic transport wheel bridge structure, characterized in that: The wheel bridge structure includes a main beam, a hinge support and a rotating mechanism, wherein the hinge support is detachably connected to the frame chassis of the transfer vehicle, the middle part of the main beam is correspondingly hinged above the hinge support, and two driving wheels are connected to the two ends of the main beam through the rotating mechanism; The rotating mechanism comprises: A fixed gear, the fixed gear being fixedly connected to the lower surface of the main beam; A turntable, wherein the turntable is rotatably connected to the fixed gear via a rotating shaft, an installation station is extended from the side of the turntable, the installation station is rotatably connected to a moving gear meshing with the fixed gear, and the moving gear is correspondingly connected to a first driving motor to drive the turntable to rotate relative to the fixed gear; The wheel seat is an inverted U-shaped structure fixed on the lower surface of the turntable, the driving wheel is rotatably connected in the wheel seat, and a second driving motor corresponding to the driving wheel is provided on the side of the wheel seat.

2. The automatic transport wheel bridge structure according to claim 1 is characterized in that: The main beam is a plate-shaped structure, and circular connecting ends are provided at both ends of the main beam. The fixed gear is concentrically assembled with the circular connecting ends.

3. The automatic transport wheel bridge structure according to claim 1 is characterized in that: The middle part of the main beam is hinged to the hinge support through a hinge shaft, so that the main beam can rotate around the hinge shaft. Mounting holes corresponding to the two driving wheels are provided on both sides of the frame, and the driving wheels extend out of the bottom surface of the transfer vehicle after passing through the mounting holes. The two buffers are respectively located at two ends of the main beam, one end of the buffer abuts against the upper surface of the main beam, and the other end upwardly abuts against the frame of the transfer vehicle.

4. The automatic transport wheel bridge structure according to claim 1 is characterized in that: A plurality of guide pillars evenly distributed around the wheel seat are provided below the turntable, a flange corresponding to the guide pillars is fixed above the wheel seat, the flange is concentrically distributed with the turntable, the flange is longitudinally slidably assembled on the plurality of guide pillars, and an elastic member is sleeved on the outer wall of the guide pillar.

5. The automatic transport wheel bridge structure according to claim 3 is characterized in that: Two ribs distributed in parallel are arranged above the main beam.

6. The automatic transport wheel bridge structure according to claim 5, characterized in that: The buffer is a spring, and a positioning column located between the two ribs is provided above the main beam, and the lower end of the spring is correspondingly sleeved on the positioning column.

7. The automatic transport wheel bridge structure according to claim 1 is characterized in that: Ear plates extend downwardly from both sides of the hinge support, and a hinge plate corresponding to the two ear plates is arranged above the hinge support, and the hinge shaft passes through the ear plates and the hinge plates along the center line of the transfer vehicle to form a hinge.

8. The automatic transport wheel bridge structure according to claim 6, characterized in that: The vehicle frame is a square truss formed by welding square steels. Square protective frames corresponding to the wheel bridge structure are arranged at both ends of the vehicle frame. The square protective frames are provided with a shift rod corresponding to the buffer member.

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